Nihon Spindle
Technical Report
No.58 2021

Nihon Spindle Manufacturing Co., Ltd.

For any inquiry on this issue, please contact Technical Report Editors Oﬃce, Technology Development Department (at the address and phone number listed below).

NIHON SPINDLE TECHNICAL REPORT
Vol. 58［Not for sale］
Published December 1, 2021
Publisher Nihon Spindle Manufacturing Co., Ltd.
〒661‑8510 4‑2‑30 Shioe, Amagasaki City, Hyogo Prefecture
Telephone 06‑6499‑4304
Publisher KATO Yasutaka
Unauthorized use of articles, photos or illustration contained in thisreport is prohibited.

NIHON SPINDLE TECHNICAL REPORTNO. 58 2021

CONTENTS
Foreword 


























































































KONDO Shigeo
FEATURE : FLOW FORMING◆ Company Profile of Leifeld Metal Spinning GmbH (LMS) 















































1
NILLIES Benedikt, HILTROP Beate◆ Manufacture by flow forming of automobile motor parts



















































9
HIGAKI Koji, SUZUKI Takashi◆ Introduction of the exhaust parts processing machine SRS150E-T4







































14
KOBAYASHI Sota, SOTODATE Katsuya◆ VF-LMS New Brand “Global Metal Forming Group” 






















































16
HILTROP Beate, SAITO Ayako
TECHNICAL REPORT◆ “JET PASTER” using Hydrodynamic Cavitation Effect 




















































18
ASAMI Keiichi◆ Static elimination function of NS Dry Booth 


































































29
MASUDA Katsuhiro
INTELLECTUAL PROPERTY REPORT 









































































33

Foreword
KONDO Shigeo, President
In August 2021, we heard a news that the highest
temperature in Greenland within the Arctic Circle exceeded theaverage temperature at this time of year as much as by 18 degrees
and it rained for the first time in the history of observation. In thesame month, a temperature of 48. 8 degrees, the highest in
Europe, was recorded in Sicily, Southern Italy. Among theenvironmental issues in the world reported almost every day,measures for the carbon neutrality to deal with global warming is
especially required. In such circumstances, EV shift is rapidly
progressing. The number of EVs (BEVs + PHVs) in the world finally exceeded 10 million andbecame 10.2 million last year, and it is said that it will be far beyond 100 million in 2030, ten
years later. In the world, this EV shift is especially accelerating in Europe, and the EU
announced their policy to virtually prohibit sales of gasoline vehicles including hybrid vehicles
in 2035. On the other hand, Japanese automobile manufacturers, which had a lead in hybrid
vehicles, fall behind overseas manufacturers in BEVs not using gasoline. They have announcedplans for large investment in BEV development one after another to recover from the delay. In
addition, since parts used for EVs tend to be modularized often compared to the parts ofgasoline vehicles and the barriers to enter the market are low, many manufacturers including
new manufactures strive to take initiative in the industry and make efforts in development.
In such circumstances, we also advance development to respond to EV shift. In this issue,
we focus on flow forming, one of the processing methods of automobile parts. Leifeld Metal
Spinning GmbH that participated in our group in June last year is a company that has theworld’s top share in the flow forming industry with their history of 130 years and excellent
technology and is an ultimate partner for our company to respond to EV shift in the future, as
well as to aim to build a company group to contribute to carbon neutrality. I expect that we willcontinuously learn from each other to grow.
In this issue, we also introduce technologies concerning JET PASTER, which ismanufacturing equipment of secondary battery materials, and dry thermal, which is equipment
to support its manufacturing environment, in addition to the contents described above. Let’s
work on actively in the future as well to create new products one after another that contribute torealization of a decarbonized society and resolution of various other social issues.

Nihon Spindle Technical Report No. 58 2021

FeatureCompany Profile of Leifeld Metal Spinning GmbH ( LMS)
Leifeld Metal Spinning

NILLIES Benedikt, HILTROP Beate
Abstract
Leifeld Metal Spinning (LMS) was established in Germany in 1891 as a pioneer of spinning machines, andjoined Nihon Spindle Group in June 2020. The company manufactures machine tools and delivers them fromfour bases to about 60 countries around the world. In this report, we introduce the history, the latest technology,
and the main products of LMS.
entire product lifecycle. The company offers all the

1. Company Portrait

services : ranging from research & development, technicalservice, spare parts procurement, consulting, and training

Strength. Trust. Certainty.
Leifeld Metal Spinning GmbH develops, manu-

to the retrofitting of second ‒ hand machines. Leifeld

factures, and distributes machine tools for chipless metal

develops new processes, technologies, and products, andforming. More than 150 employees work at locations in

has filed for patents on more than 140 inventions to date.

Germany, the USA, China, and Russia. The company is

2. History

present in all the major global markets due to numerous
branches on all the continents. The core industries areautomotive,

aerospace,energy,andindustrial

applications. The production sites and headquarter are

Beginning as a manufacturer of wooden barrels 130
years ago, Leifeld has advanced to become an industry‒
leader.

located in Ahlen, Germany.
The product range includes machine tools for the

1891- 1920 : The beginnings

manufacture of various intermediate or end products. The

It was in 1891

machines are equipped with multifaceted automation

that

Josef

Leifeld

solutions and can be individually adapted to suit theestablishedthecustomer’s requirements. In 130 years of business,‘Böttcherei

Leifeld’

Leifeld Metal Spinning has manufactured over 6, 125(‘Leifeld Cooperage’)machines and delivered them to 60 countries.

for

producingtubs,

Leifeld Metal Spinning also supports its customers

vats, butter centrifuges

with a comprehensive range of services which cover theand straw cutters. In

Fig. 1 Overview of the head office factory― 1 ―Nihon Spindle Technical Report No. 58 2021

Feature1920, Josef Leifeld II transforms the cooperage into a

2000- 2010 : World market leader in chipless metal

metalworking shop : ‘Josef Leifeld Blechwarenfabrik’

forming(‘Josef Leifeld Sheet Metal Goods Factory’).

Leifeld develops
the first machine for

1921- 1967 : Leifeld revolutionizes spinning machines

producing one ‒ piece,

The world’s firstweight ‒ optimised

manual spinning lathe

forgediswheels and the firstdevelopedby

Leifeld in 1930. The

machinealuminium
forthefirst hydraulic spin-

vertical production of aluminium and steel wheels as wellning machine in theas cast and forged aluminium wheels. In 2007, the Georg

world follows in 1945. Fifteen years later, the first

Kofler Group takes over Leifeld Metal Spinning GmbH.

hydraulic spinning machine with copy control and an

In 2010, Leifeld builds the longest flow ‒ forming

automatic program comes onto the market. Finally, inmachine in the world with a length over 30 m.

1967, Leifeld develops the world’s first NC spinning
2011- 2019 : International growthlathe.

In 2011, Leifeld
1968- 1999 : Years of innovation

expands to China and
The first CNC ‒establishes the com-controlled metal spin-pany

Leifeldning machine in the

Machinery Trading inworld is developed by

Shanghai. In 2013,

Leifeld in 1971. In 1988, Leifeld develops the firsta branch plant is set up in Artern. In the same year,

machine for producing multiple‒component aluminium

Leifeld develops the strongest flow‒forming machine inwheels, and a year later a new process for manufacturing

the world, followed one year later by the world’s biggest

one ‒ piece, weight ‒ optimised cast aluminium wheels,

horizontal CNC metal spinning machine. In 2015, Leifeld

which display a similar strength to forged wheels. The

expands into the USA and establishes Leifeld USA Corp.

first machine for producing clutch plate supports is

In 2016, the year of its 125 th anniversary, Leifeld

launched in 1995.

delivers its 6, 125 th machine. In 2017, a new site is
opened in Russia. A further production facility in Ahlen
is being built and opened in 2018.

Fig. 2 Milestones in Research & Development― 2 ―Nihon Spindle Technical Report No. 58 2021

Feature2020- today : Pioneering spirit

and the possibility of creating any kind of form changes
Leifeldis

at low tool cost and in fast production runs make metalawarded as “World

spinning for smaller and medium batches to one of theMarket Leader‒Future

most competitive alternatives for rotation symmetricChampion” and “Inno-parts to other processes, such as deep drawing. The highvation Leader” for its

work ‒ hardening rate enables the use of more cost ‒continuous pioneering spirit. Leifeld expands its digitaleffective materials, while nevertheless guaranteeing thesolutions as well as its online presence in the social

stability of the finished article and the required increased

media. In 2020, Nihon Spindle Manufacturing enters astrength. This results in an enormous savings potential instrategic partnership with Leifeld and takes over theterms of material and weight. Metal spinning tools

company. Besides two strong brands and the extended(spinning rollers) are primarily not bound to the

product portfolio, Nihon Spindle and Leifeld strengthen

geometry of the work piece. This means that changes intheir joint sales and service network worldwide. New

geometry can be made in virtually any areas of the work

technologies and machines with smart control are close topiece by implementing simple programming changes.

being launched on the market.

3.2 Flow forming

3. Market leading metal forming technologies

With flow forming pursuant to
DIN 8583, rotationally symmetrical

According to the German Industry Norm, Leifeld

hollow bodies with a cylindrical,

divides between five metal forming technologies.

conical or curved surface line areformed from a tube or bowl.

3.1 Metal spinning

A preform is slid onto the mandrel and clamped
Metal spinning pursuant to DIN

securely. As a rule, two, three or even more rotating flow

8584 consists of transforming a‒ forming rollers press radially onto the rotating work

circular blank by chipless forming

piece, such that the material flows in an axial direction.

with a roller into a rotationally

The wall thickness is thus reduced and the work piece issymmetrical hollow body.

lengthened. The process is also frequently referred to as

A preform is clamped against a spinning chuck andcylinder flow forming, whereby a distinction is madeset in rotation. The spinning roller forms the preform step

between forward and backward flow forming. An

by step until the material has been brought onto theessential criterion regarding the process to be used is thespinning chuck. Rotating tools generate a variety ofquestion of whether the workpiece is solely of tubular

surface lines on the work piece, which is also rotating, so

form or if it has a bottom and can be clamped. In the casethat the final form of the work piece is generated and theof forward flow forming, it is also possible to form teeth

surface is smoothed.

and so to produce a range of different internally toothed

A variety of other, additional machining processes

gear components.

can be performed in the same clamping setup, such as thesubsequent profiling of contour areas, the separation ofAdvantages of flow forming

marginal or base areas, the bordering of external edges,

The aim of flow forming is always to achieve aetc. In this way, virtually any type of hollow body can be

reduction in wall thickness. The final state is attained byproduced with complicated or complex geometries, very

pure compressive loading. The pressure applied to thenarrow tolerances and excellent surfaces.

material first of all serves to plastify the material andlengthen the work piece’s and also increases the strength

Advantages of metal spinningof the material. The result is an extended work piece with

Metal spinning displays obvious advantages in terms

enhanced material properties, a higher load ‒ bearingof cost‒effectiveness and flexibility. Savings in material

capacity and a longer service life than components― 3 ―Nihon Spindle Technical Report No. 58 2021

FeatureAdvantages of shear forming

produced by metal cutting processes.

The advantages of shear forming lie in the simplicity

3.3 Profilingof the process. All conically tapering components with an
Profiling consists of forming

angle of more than 18°can be made by shear forming in anotches, grooves, etc. into a roundsingle clamp. Since the process consists purely ofblank or preform over several stages.

material displacement, the change in the wall thickness of

The most important variants are thethe finished part can be optimally calculated. While thesplitting,compressing,shear forming roller moves parallel to the spinning chuck,thickening and rolling procedures. Hub moulding is also

the wall becomes increasingly thin in relation to the cone

associated with profiling technology.

angle (S1 = S0 sin α). The process results in narrow

bending,

A preform or round blank is clamped between thetolerances and polishable surfaces.

main spindle and the tailstock spindle and set in rotation.

3.5 Necking‒in

A variety of profiling forming rollers are now applied inseveral consecutive work steps and brought towards the

Necking ‒ in consists of gradu-

work piece. The profiles of the rollers are coordinated inally reducing the diameter of thesuch a way that they build on each other and ultimately

preform.

generate the material distribution and the final contours

particularly suitable for formingof the work piece.

necks at pipes or hollow parts for

Theprocedureispressurised vessels, gas cylinders or other metal bottles.
Advantages of profiling

Necking‒in is suitable for both vessel bottoms and necks,

Chipless profiling results in optimum material andbottoms in steel resulting in a permanently gas‒tight seal.

surface properties and narrow tolerances, which is

The preform is heated in an induction unit outside

essential for safety‒relevant parts in particular, such as

the necking‒in machine, clamped in the jaw chuck of thepistons for brake components. The enormous cost savingsmachine by an automatic feeding facility, and set inresulting from the low material input, creation of wear‒

rotation. A necking‒in roller installed on a 100°swivel

resistant or installation‒ready surfaces, lowest machining

support gradually moves material from the pipe to theremachining of the material overflow and very shortcentre of rotation. The number of swivel steps determines

cycle times should also be emphasised.

the wall thickness of the evolving bottom or neck of thevessel. A wall thickness bulge of up to 4x t0 is possible.

3.4 Shear Forming

To avoid slag inclusions in the centre of steel bottom, an
In shear forming, a round blank

optional cutting torch can be used to ensure aor preform is placed onto thehomogeneous material distribution and the vessel’s

external tool contours through shear

ultimate gas tightness.

forming rollers. Shear forming is anincremental forming process that is

Advantages of necking‒in
Necking ‒ in allows optimum determination of therelated to metal spinning.
A round blank or preform is clamped between thewall thickness progression in the diameter reduction

spinning chuck and the tailstock pressure disc and set inzone. Short cycle times, process reliability in production,

rotation. The round blank is formed parallel to thehighest machine availability and constant product quality

external contours of the tool by the shear forming rollers

result in cost‒effective manufacture.

and applied to the tool. In contrast to the gradual metal
spinning process, the material is applied in a single
overflow : the metal is projected from one level toanother.

― 4 ―Nihon Spindle Technical Report No. 58 2021

Feature4. Machines and processes for the
production of weight‒optimised wheels

But here, too, the weight savings can be attractive tomanufacturers and buyers who are less concerned withdesign and more with economy.

Less weight means fewer CO2 emissions ‒ this

4.1 Less weight and still more resilient

applies to both cars and trucks. There is a lot of saving
potential in wheel rims. With Leifeld Metal Spinning

If aluminium rims are often cast or forged in one

GmbH’s flow‒forming machines, the chipless production

piece, steel rims usually consist of a rim ring and a wheelof weight‒optimised wheels will be possible‒without loss

disk. The rim ring can be produced in the car sector, andof payload.

both parts can be produced in the truck sector using theflow ‒ forming process. Work hardening improves theWith our machines and technology, we can design

microstructure in the material and thus increases the final

steel rims for cars and trucks so that they’re significantly

strength. We have the possibility of reducing the material

lighter than conventional wheels and yet just as strong.

cross section at certain points and flexibly adjusting it to

Leifeld Metal Spinning GmbH develops machine tools

the load requirements of the wheels.

for chipless metal forming, which are used worldwide in

4.2 Weight‒optimised rim rings

the automotive industry, aerospace technology, theenergy industry and in various consumer and industrial

Leifeld Metal Spinning GmbH offers two different

goods sectors. One of our customers was able to use ourmachine production series and flow‒forming processes‒

technology to produce rims with a payload of 580

the FFM series (Fig. 4) for backward flow forming andkilograms, which is almost 900 grams lighter than with

the RSC + RC machines (Fig. 5) for biconical forward

other manufacturing processes. This pays off, especiallyflow forming. The difference here is the feed direction of

in terms of fuel consumption. And the more wheels are

the rollers and the flow direction of the material. Both ofused, the better the result. We think here of truck with athem form tubeless steel wheels in large or small

tractor unit with six wheels, plus spare wheels and trailer

quantities.

wheels.

Manufacturers can produce cylindrical components

Surely, aluminium wheels are much prettier thantheir steel alternatives and are very popular with car
buyers when they’ve been painted, mirror‒finished, mattbrushed and sometimes chrome‒plated. But they are also
more expensive‒and more vulnerable, e.g. to road salt or
impacts. Repair is costly and/or sometimes impossible.
Steel rims are much more resilient, and with the rightmanufacturing process they can actually be even lighterin the car sector. This is different than the truck sector.

Fig. 3 The rim ring is produced weight‒optimised by flow‒
forming technology.

Fig. 4 The FFM machines use the backward flow-forming process to form weight‒optimised rim rings. The
cycle time is approximately 12 seconds.

― 5 ―Nihon Spindle Technical Report No. 58 2021

Featuremachine side then removes the finished part from the tool
mandrel onto the unloading chute. Finally, a robot takes
the flow ‒ formed component out of the machine. The
automatic quick‒clamping device for tool mandrels androllers minimises set‒up times and thus increases cost‒effectiveness.
With cylindrical counter‒rotating flow forming, we
can use universally applicable tools for different wheel
widths. The preform is easy to measure ; there is a highdegree of work hardening and no need to cut off excess
Fig. 5 View into the working area of the Leifeld RSC Series
with 4 flow‒forming rollers : The machine ensures asymmetrical distribution of forces and a very highdegree of rotational accuracy for the component.

material. That’s what makes this machine so popular atour customers.

4.3 Forward flow forming for car wheel rims
With biconical forward flow forming (Fig. 6), thesuch as the rim rings on the FFM machine (Fig. 3). To

preforms for rim rings can be produced not only at an

get exact ring widths, measuring devices record

optimised weight, but also at an optimal weight.

tolerances in the circular ring, which are compensated by

However, this is only possible for biconical components

the machine control system‒without additional trimming.

with a cylindrical inner diameter and axial clamping

A modified cross‒section of the output sheet metal ring

range‒such as the drop‒centre area.

saves weight. Here is the actual process. A conveyor belt

Leifeld offers the RSC + RC series for this purpose.

transports the preform, which was cut from stripe,

A loading device or a robot picks up the preformedrounded, and welded into a sheet metal ring, to thecomponent and places it in the machine. There, it ismeasuring device. If everything fits, a robot picks up the

picked up by two mandrels in a form ‒ fit and force ‒component and places it in the machine’s loading device.

locked manner. Two co‒rotating rollers each press the

There, the preform is automatically pushed onto amaterial in the direction of the axial feed in opposite

mandrel and fixed. The main spindle drive sets the

directions. The area not yet involved in the forming

mandrel with preform in a turning motion. Under CNC

process is pushed in front of the roller. The machine thus

control, the roller, which runs in the opposite direction,

ensures a symmetrical distribution of forces and a veryflow‒form the material in an axial direction. The wallhigh degree of rotational accuracy for the component.

thickness of the preform is reduced to the desired

With forward flow forming, no additional calibration

thickness. The final component length is permanently

expansion and no section length measurement aremonitored and stopped in the machining program whenrequired. Greater preform and sheet metal tolerances can

the final rim ring width is reached. A scraper on thealso be used. The excess material is then removed in

Arrangement of the rollers

ProcessFig. 6 The biconical forward flow forming is proceeded by Leifeld’s RSC and RC series.

― 6 ―Nihon Spindle Technical Report No. 58 2021

FeatureFig. 7 SC Series

Fig. 8 Examples of processed products

another machine so that the desired material thickness
and length are achieved exactly. The component isMore than 950 Leifeld automatic Spinning Machines
worldwide are evidence of quality and success.

therefore free of weight differences resulting from the

5.2 WSC Series (Fig. 9)

sheet metal thickness tolerance of the pre‒material.
Manufacturers can use our machines to design the

Featureswheels as they are required by vehicle producers‒lightwith a high payload. They can thus safely withstand・Flow forming, splitting, and profiling of cast andforged wheel preforms

increasing competitive pressure in the future as well.

5. Flagship models
Among all the models, two of Leifeld Metal SpinningGmbH’s flagship models are introduced here.

5.1 SC Series (Fig. 7)
Features
・The spinning machine series with a wide variety ofmachines is covering the blank diameter up to 5000
mm.
・Manufacturing of rotationally symmetrical hollow
shapes from circular blanks, tubes or preforms(Fig. 8)
・Universal, flexible applicability from household
applications to wind generators
Fig. 9 WSC Series― 7 ―Nihon Spindle Technical Report No. 58 2021

FeatureFig. 10 Examples of processed products

・Processing of steel, aluminium, and other metals
・Warm or cold working, depending on raw material
・Output of more than 500,000 wheels per year
・The use of flow forming to create cylindrical rings
that are later formed into weight ‒ optimised rims
results in a significant reduction in weight and CO2
emissions for cars, trucks, and buses.
Leifeld’s solutions developed for the wheel industry
enable the production of highly stress‒resistant and yet
light wheel rims and discs as well as rim rings (Fig. 10).

― 8 ―Nihon Spindle Technical Report No. 58 2021

FeatureManufacture by flow forming of automobile motor parts
Industrial Machinery Moriyama Division

HIGAKI Koji, SUZUKI Takashi
Abstract
We introduce an example of using the flow forming method for the structural parts of automobile motors,
mainly for motor shafts. And we introduce an example of using flow forming for forming a high‒cost raw tube.
is aimed at. In addition, when the diameter reduction of a

1. Introduction

pipe material is carried out by forging, the side that is not

Currently, electrification of automobiles is rapidly

processed should be open because of the condition of the

progressing. In China, new vehicle sales will be limited todie, however, it is possible to carry out diameterelectric vehicles (hereinafter referred to as EVs) andreduction on both sides with flow forming. It is also

hybrid electric vehicles (hereinafter referred to as HEVs)

possible to easily accommodate flange processing andin 2035, and sales of gasoline vehicles and diesel vehicles

relatively complicated shapes such as a groove set on awill be prohibited. Such movement is also seen in France

raw tube as necessary by changing the tools and theand some states in Canada and the US. The UK evenprogram.

announced that it would be advanced and implemented in

In this technical report, we will first introduce the2030. Also in Japan, a government view that sales ofstructure and issues of the previous automobile motors

gasoline vehicles and diesel vehicles will be prohibited inand summarize the current situation of the manufacturing

the middle of 2030s as one of the approaches to achieve

method of motor shafts (rotor shafts) that exist in motors

carbon neutral status (total of exhaust and absorption ofof most types. Next, we will introduce cases we aregreenhouse effect gas will be zero) by 2050 has beenworking on concerning the items in which the flow

announced, which makes the automobile industry informing

Japan more perplexed.

improvement and manufacturing cost reduction of motor

methodcancontribute

to

the

function

As we are in such a revolutionary transition period,

shafts. It also includes a case in which the splitting

most automobile manufacturers that have mainly adopted

method used in hybrid unit parts (rotor shafts) thatinternal ‒ combustion engines promote development by

Nissan Motor Co., Ltd. developed with us approx. tenchanging from HEVs to EVs, and as for batteries andyears ago was adopted. Finally, we will briefly introduce

motors, development competition is intensifying in every

processing cases of parts (stator housing, water jacket)

organization from motor manufacturers to electricalother than motor shafts that we worked with.

manufacturers, as well as supplies related to automobiles.

2. Structure of Automobile Motors

For development of these units, they face a dilemma thatthe weight of each part cannot be increased very much

Fig. 1 shows a typical structure of brushless motors

while capacity enlargement and improvement of

installed in HEVs/EVs. In the structure of a motor shown

efficiency are desired, which has become a great

here, coils are placed on the external stator, and a rotor ischallenge. Approx. a half of the weight of a motor is that

positioned inside. The rotor consists of a core thatof structural parts, and as for rotating parts such as motor

supports the magnetic body and a shaft that transmits

shafts, hollowing with the flow forming method is atorque as an output shaft. Since normal on‒board motors

technology that has started attracting attention because

should be installed in limited vehicle space, permanent

reduction of weight can be achieved while a high torquemagnets

― 9 ―

that

easily

allow

size

reductionandNihon Spindle Technical Report No. 58 2021

FeatureOutput shaft

Bearing

Rotor

Bearing

Winding

StatorBracketStator
Coil

Rotor
Lead wireto power source

Fig. 1 On‒board motor structure1) 2)

improvement of efficiency are used for rotors in manyis because among the components of the motor unit,

cases.

weight reduction of the permanent magnets and coils isdifficult, and the shaft that has been manufactured with a

3. Issues of EV motors

solid material takes up great weight in the motor unit. For

It is feared that future new vehicle sales will bethis hollowing of the motor shaft, the flow forming

limited to EVs because of restrictions implemented inmethod is considered in various places. We will explain

various countries. One of the performance goals of EVs isthe effectiveness of this method in the following.

the “cruising distance.” The target cruising distance in a

4. Motor Shaft Shapefully charged state is approx. 600 km, which is equivalent
to the average cruising distance of current internalFirst, we will introduce motor shafts installed in EVs

combustion vehicles. The cruising distances of current

in the early days. In many cases, the external shape was

EVs are said to be 6 to 7 km per 1 kWh of battery. The

formed by hot forging or cutting from a round bar

capacity of the battery installed in Model S in 2020 ofmaterial, and a solid material was used as it was (Fig. 2

Tesla Motors is 100 kWh, and the cruising distance is 647(a)). On the outside of the motor shaft, a rotor core was

km (catalogue value). The battery weight of this Modelinserted, and the cooling unit was installed only on the

S is as much as 700 kg, and the weight of an EV taken up

outside of the stator. When EVs were initially released inby the battery is significant, considering that the gasoline

Japan around 2010, the battery cost was enormous in any

tank weight of an internal combustion vehicle is approx.

case, and the capacities of the batteries installed in the

35 kg. When the battery capacity is increased to achieve

initial type EVs were about 16 to 24 kWh, and the motor

the target cruising distance, the vehicle weight and cost

output was around 80 kW. Since EVs were mainly driven

increase accordingly, so vehicle manufacturers are eager

in town, the cooling unit may have just needed to meetforsuch usage. After that, for improvement of the“developmentofhighlyefficientmotors,”“improvement of cooling performance,” “improvement

practicabilityof battery energy density,” and “reduction of weight.”

environment described at the beginning of this report, aIn the current automobile motor development, forcruisingof

distanceEVs

toequivalentemphasize
to

that

the
of

globalinternal

size reduction and improvement of efficiency, copper

combustion vehicles and improvement of mobility havewires are changed from round wires to rectangular wires

been pursued, and the output of on ‒ board motors has

to improve the space factor to reduce copper loss in the

been dramatically increasing. While not only increase ofcoil part, and the laminated core in the rotor part is madethe motor size but also high‒speed rotation is consideredthinner to reduce iron loss. As for improvement of theto increase the output, suppression of heat generation thatbattery energy density, solid ‒ state batteries attract

accompanies increase of output has become a constantattention. To reduce the weight of parts, hollowing of thechallenge. Especially with EV motors in which

output shaft of the motor is considered, for example. This

permanent magnets are installed, performance as a motor― 10 ―

Nihon Spindle Technical Report No. 58 2021

Featuremade bigger than that of products manufactured withforging + cutting, which allows inexpensive shaft
formation. Shaft formation with the flow forming method
allows formation from two kinds of materials : a pipe(a) Solid state produced with (forging and) cutting

material and a disk material.

5.1 Formation from hollow pipe material(Fig. 2 (c))
Reduce the diameter of the one side of the pipe(b) (Forging and) cutting + Drillingmaterial, invert the material, and reduce the diameter ofthe opposite side. By doing this, a shaft with a large
hollow on the inner diameter side can be formed. Since amaterial with high hardness such as S45C is selected forthe material for motor shafts, the warm method in which
the material is preheated is used during processing. It isalso possible to form a flange that serves as a stopper(c) Flow forming

when the rotor core is inserted by processing with a

Fig. 2 Motor shaft cross section for each method

dedicated roller after diameter reduction is carried out on

is damaged by demagnetization caused by temperature

both ends. Because of the warm method, the formation

rise of the neodymium magnet used. Therefore, currently,

load is also small, and formation from a pipe material

shafts that were originally solid but drilled to cool fromwith a plate thickness of approx. 10 mm is relatively easy.

the inside are seen (Fig. 2 (b)). However, such

However, as described in the following, there is aformation of hollow shafts has a problem that the

problem that the material cost of the pipe material is highmanufacturing cost increases significantly because thecompared with a forging material.

drilling process is added to the conventional process

5.2 Processing from disk material(solid).

5. Hollow Shaft Formation with Flow
Forming Method
If

the

flow

forming

method

is

used

for

manufacturing of motor shafts, the hollow space can be

Disc material

SplittingMotor shafts are used with a high rotation speed, andextremely high accuracy is required for its concentricity
and cylindricity for the rotation performance. Therefore,
the raw tube becomes a seamless pipe, and the materialcanFlat pressing

be

often

expensive,

Ironing

Fig. 3 Raw tube formation with splitting method― 11 ―

includingthethermalNihon Spindle Technical Report No. 58 2021

FeatureFig. 4 Each process of raw tube formation

processibility after processing. As a manufacturingmethod of a seamless pipe, processing from a discmaterial with use of the flow forming method is possible
in addition to the drawing process.
Fig. 3 shows a process to process a thick cylindricalmaterial from a disc material by using a splitting method.
We developed this method on the assumption of a hub
shape that is not originally very long. The following is anFig. 5 Stator structure3)

example where the raw tube of a motor shaft was formedby using this method.

it is pressed against the die, and a length and plate

We adopted carbon steel of S35C to S45C class for

thickness that are arbitrary to a certain degree can be

the material of the disc material. In this case, the plate

selected by changing the program only if the die diameter

thickness is 10 mm. Because of the large material

is changed. The disadvantages are that the wall forvolume, splitting is carried out with an R roller with achucking remains in the center, and the processing time isrelatively large width. If high carbon steel is split withlonger because there are many processes in successive

cold working, it will be broken during processing, so

forming. In the case of the former disadvantage, if thewarm working (700℃ or above at the time ofwall is not necessary, it can be removed only in anotherpreheating) is applied. The plate thickness of theprocess after raw tube formation. However, as for theprocessed part is 6 to 7 mm when splitting has been done,

latter disadvantage, we aim to make the processing time

however, the plate thickness becomes 9 mm or moreas short as possible as a challenge in the future.

except for the part around the center when flat‒pressing

6. Efforts for Other Motor Parts(processing of the processed part in parallel with therotating shaft with a flat roller) in the next process is

6.1 Processing of Stator Housing

carried out. Finally, the inner diameter is extended along
the die with the R roller used at the beginning. Ironing is

Fig. 5 shows an example of the stator structure of acarried out to have a uniform plate thickness of approx.

motor. (The outer shell part of the stator is called a

6.5 mm.

housing.) In this structure, the flange part is integrated

After that, since the plate thickness near the tip

into the end of the cylindrical part, and the flange part iswhere the diameter was reduced with diameter reductionused as a piece of the attachment bolt in the machining in

described previously becomes larger, we think we canthe post‒process.

apply this processing example to typical motor shafts for

Generally, the plate thickness of the flange part in a

EVs and HEVs at present. The advantages of this method

product state is set larger than that of the cylindrical part,are that a shaft material can be manufactured from small

however, the plate thickness of the flange part is reduced

equipment by using an inexpensive material, post ‒because the diameter is larger than that of the cylindrical

processing for the inner diameter is not required because

part.

― 12 ―

Nihon Spindle Technical Report No. 58 2021

FeatureFig. 6 Stator housing structure and example of flange processing with flow forming

In the processing carried out this time, the thickness
reduction ratio was suppressed to 80% by bringing down

Die

Water jacket

the material diagonally with a taper roller in the firstprocess and then bringing it down orthogonally with a flatroller in the second process.

Eccentricity

6.2 Water Jacket

Roller

A water jacket is a part positioned outside theFig. 7 FF processing of water jacket

housing to form a hollow part between the housing andcool the motor by letting cooling water pass. It was

Level difference

common to process both ends of a cylindrical material,
which was made by rolling an iron plate and welding it,with a press from a viewpoint of the material yield,
however, processing with a press has become difficult as
the outer diameter has become larger. With processing

Water jacket

with flow forming, an eccentric die is used as shown in
Fig. 7, however, there is a problem that distortion in thematerial stage cannot be corrected completely while strict
accuracy is required for circularity, etc. of motor partsand processing in the tolerance range is difficult. In

Fig. 8 Level difference processing of housing

addition, we can propose to process only one side of thewater jacket by setting one level difference as shown in

the entire manufacturing industry including all theFig. 8 in flange processing of the stator housing described

suppliers,

above. One ‒ side processing is highly effective as it

manufacturers, etc. will be required to contribute to

makes dimension adjustment easy, and distortion isrealize a carbon neutral status in their manufacturing

expected to be reduced eventually.

processes respectively.

7. Future Prospectequipment

manufacturers,

8. Related Patent

To reach the great goal to achieve the carbon neutral

Patent No. 5707624 March 13, 2015

status by 2050 described at the beginning, replacement of

9. Sources

gasoline vehicles with EVs is mainly carried out globallyat present. In the automobile industry in Japan, not only

1) Nidec Corporation homepage

the generation rate of carbon dioxide gas during driving

2) Oriental Motor Co., Ltd. homepage

but also reduction of CO2 in the life cycle including3) Mitsubishi Electric Corporation homepage

manufacturing, transportation, disposal, and recycling of
automobiles has started attracting attention. In the future,― 13 ―

material

Nihon Spindle Technical Report No. 58 2021

FeatureIntroduction of the exhaust parts processing machine SRS150E- T4
Leifeld Metal Spinning

KOBAYASHI Sota

Industrial Machinery Moriyama Division

SOTODATE Katsuya

Abstract
We have released new model of spinning machine for exhaust system parts which is hydraulic‒free (fully
electric), more compact than the conventional model, and has shorter cycle time. In this report, we introduce thedetails.

to form automobile mufflers and catalytic converters

1. Introduction

from tube ‒ like works by spinning. Exhaust parts

One of our major products is the machine to processprocessors are roughly classified into those exclusively

exhaust parts, such as mufflers and catalytic converters

designed for concentric parts and eccentric and oblique

for automobiles. While the automobile industry is rapidly

parts. Fig. 1 shows examples of concentric parts andshifting towards EV, there are voices saying that theeccentric and oblique parts that have been processed.

internal combustion engines will not be obliterated

We have released a new model SRS150E‒T4, ancompletely in the immediate future because there are

improved version of concentric parts processor SRS150‒

issues remaining in the battery and infrastructures.

T4. This paper introduces its features (Fig. 2).

However, amid the decreasing demand, companies are
shying

away

from

the

conventional

mainstream

production method of large press because of the need fora very large initial investment including the mold and, on
the contrary, the demand for spinning machines, forwhich the investment required is relatively small, issteady for the time being. This exhaust parts processor is
one of the VARIFORMA® series products and a machine

Fig. 2 SRS150‒T4 (Conventional model)

2. Features of SRS150E‒T4(a) concentric parts

This section introduces features of SRS150E ‒ T4
focusing on improvements made from the conventionalmodel SRS150‒T4.

2.1 Hydraulic‒free
With the development of an electric work clamp, the(b) eccentric and oblique parts
Fig. 1 Product example after processing

hydraulic system used for the hydraulic clamp in the― 14 ―

Nihon Spindle Technical Report No. 58 2021

Featureconventional model has been eliminated to drive the

2.3 Space‒saving

entire system with electrical power. For this reason, theletter “E” has been added to the model number to indicate

By miniaturizing the control panel and unifying it

it is driven electrically. Compared to the electric motorwith the machine, a significant reduction of 40% in thecapacity of 1.5 kW for the conventional hydraulic unit,

footprint of the machine has been achieved compared to

the new model makes it possible to clamp the work with aconventional

0.5 kW servo motor and, with a reduction in the standby(Fig. 4).

machineswithsimilar

specifications

power consumption and the elimination of need forhydraulic fluid, is an energy and resource saving
machine.

2.2 Electric thin scroll chuck
There are two types of hydraulic work clamps forthe conventional model ... one using semicircular split
clamp blocks and another using a collet chuck with eightjaws. While the semicircular type is economical with asimple construction, it only allows tolerance in the
product’s outer diameter up to about ±0.3 mm. Althoughtolerance up to ±2 mm in the outer diameter are tolerated

Fig. 4 Space savingby the 8‒jaw collet chuck, it is big and relatively
expensive.

2.4 Reduction in the cycle timeOn the other hand, the newly developed electric
scroll chuck allows tolerance in the outer diameter up toWith the adoption of electric scroll chuck described±2 mm and is capable of processing both sides of theabove, both sides of the work can be processed with awork with a single chucking by reducing the clamp width

single chucking and this reduces the cycle time by about

to 100 mm and adopting a construction to allow the

15 seconds. The processes underlined in Fig. 5 are noclamp to turn 180 degrees. Fig. 3 illustrates thelonger necessary.

construction of the electric scroll chuck.

Loading the work → Positioning → Clamping → Processing→ Unclamping → Pulling out the work → 180-degree reversal→ Positioning → Clamping → Processing → Unclamping→ Unloading the work
Fig. 5 Exhaust parts processing cycle

3. Conclusion
With the significant reduction in the cycle time andsavings in the space, the new SRS150E‒T4 is a machinethat can enhance CSR activities of our customers insaving energy and resources, in addition to those of ourcompany. We will aim to expand the sale of SRS150E‒(a) Overall view of the chuck(b) Picture of chuck partFig. 3 Electric scroll chuck

T4 in the future and, at the same time, make an effort todevelop new products with a similar perspective.

― 15 ―

Nihon Spindle Technical Report No. 58 2021

FeatureVF- LMS New Brand “Global Metal Forming Group”
Leifeld Metal Spinning

HILTROP Beate

Planning Division

SAITO Ayako

1. Introduction

2. VF‒LMS new brand “Global Metal
Forming Group”

On May 29, 2020, Leifeld Metal Spinning(hereinafter referred to as LMS) of Germany, a pioneer

The logo of the new umbrella brand that is namedin spinning and flow forming, had been added to our“Global Metal Forming Group” combines elements of thegroup. An umbrella brand was built to communicate andNihon Spindle logo (red curve) and the LMS logo

underline the unity as a globally operating group with the(triangle) to represent our joint team, the history, and theassociated brands to the outside world.

values of both companies (Fig. 1).

We play a decisive role in writing the future of themetal forming sector. We aim to shape our industry forthebetter,representingadriving

force

in

its

transformation and adaptation to new paradigms.
Through innovative strength and dedication to excellent

Fig. 1 Global Metal Forming Group brand logo

execution, we set standards for future solutions inforward‒looking fields. Our role as a market leader

The new brand is positioned as an umbrella brandmeans an obligation : to take on the challenge offor our LMS business and for our VF businessadvancing technology as well as the industry as a

(VARIFORMA®

whole‒for the benefit of our clients.

Moriyama Division, this means for spinning and flow

brand)

forming machines (Fig. 2).

Fig. 2 Positioning of Global Metal Forming Group brand― 16 ―

withinthe

Machinery

Nihon Spindle Technical Report No. 58 2021

Feature3. Brand insights and brand launch
The Global Metal Forming Group brand wasofficially registered by the European Union Intellectual
Property Office in May 2021 (trademark no. 18357801),
followed by further international trademark registrations.
The core of our newly built brand are four values :strength, trust, aspiration, and transformation (Fig. 3).
In the course of the brand launch we publisheda new group website (globalmetalforming.com) andprocessed a corporate design relaunch. The new branddesign combines the best of both worlds‒Nihon Spindleand LMS‒and is present in various communication
channels, such as print and online media (Fig. 4).

Fig. 3 Core values of the Global Metal Forming GroupNew presentation layout

New website www.globalmetalforming.com
Fig. 4 Examples of brand commuication― 17 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report“JET PASTER” using Hydrodynamic Cavitation EffectMixing Business Center

ASAMI Keiichi
Abstract
In this report we explain about the next generated lithium ion battery slurry and polymer electrode fuel cell
(PEFC) slurry by “JET PASTER” using Hydrodynamic Cavitation Effect.

1. Introduction“JET PASTER” is a unique mixing / dispersing
device that utilizes the expansion/contraction effect of
bubbles (microbubbles) generated by hydrodynamic
cavitation.
Cavitation can be classified into two types :hydrodynamic cavitation and acoustic (ultrasonic)

Fig. 1 “JET PASTER” using cavitation effectcavitation. Acoustic cavitation is a method in which a gas
dissolved in a solvent is aggregated by ultrasonic

It is an epoch‒making JET PASTER that does notvibration to form bubbles. When the bubbles collide withrequire the kneading process for producing lithium‒ion

an object, the bubbles explode to be dispersed by thebattery slurries.

generated impact force. Therefore, erosion of the device
is likely to occur.

Professor Hosokawa of Kobe University, we found thatOn the other hand, the hydrodynamic cavitation is amethod in which bubbles generated by the rotation of therotor

repeatAs a result of a joint research with Associate

expansion

andcontractiondue

the bubbles generated by cavitation greatly contribute to
the dispersion.1)

toFigure 2 shows the dispersion mechanism byatmospheric pressure fluctuations in the device tobubbles

promote dispersion. Bubbles disappear naturally atmechanism by cavitation proceeds as follows.

atmospheric pressure.

generatedbycavitation.

The

dispersion

Aggregates such as the electrode active material at

2. Hydrodynamic Cavitation Effect andJET PASTER
Figure 1 shows a high ‒ speed camera picture of

the left end of Fig. 2, carbon nanotubes, and carbon blackwith platinum catalyst used in fuel cells become nuclei
and bubbles by cavitation are generated from inside theaggregates

andexpand.

The

bubbles

contract

bubbles (microbubbles) generated by hydrodynamic

approaching atmospheric pressure. By repeating thesecavitation (hereinafter, hydrodynamic cavitation iscycles, dispersion proceeds from the inside of theabbreviated as cavitation in this report) flowing out of theaggregate.

outflow part

Therefore, fibrous materials such as entangled

It is observed that uniform and very fine bubbles aredischarged from the outflow port. By this bubble
aggregatesofelectrodeactivematerial,

carbon nanotubes can be uniformly come loose anddispersed without damage.

carbonnanotubes, carbon black and carbon black with aplatinum catalyst can be dispersed relatively easily.
― 18 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report・Short ‒ time dissolution of poorly soluble

3. Comparing of conventional mixers and
JET PASTER

polymers and dispersion of minute carbon
materials are possible.
・ Continuous supply or simultaneous supply of

Table 1 shows the features of the conventional
mixers problems with conventional mixers are below.

various powder materials is possible by

1. Difficult to dissolve poorly soluble polymers (egvacuum suction force

CMC, flour, etc.).

2. Soft and uniform dispersion
・Dispersion

2. Difficult to disperse fine carbon materials such asacetylene black and carbon nanotubes.

ofsecondaryaggregationispossible・ Primary particles are not destroyed

3. Since it depends on a strong shearing force, theactive material is easily destroyed.

3. Compact design saves space

In addition to the conventional mixers listed in Table

4. Completely disassemble structure

1, in ‒ line mixers and vertical high ‒ speed mixers that

Very important points are the short‒time dissolution ofutilize strong shearing force have been put on the market,

poorly soluble polymers and the simultaneous supply of

but there are 1 to 3 problems as with the above devices.

powder materials. These features are created by the“JET PASTER” has the following features.

cavitation effect.

1. High‒speed dispersion

Fig. 2 Dispersion mechanism by bubbles generated by cavitation effect
Table 1 Features of the conventional mixers― 19 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

4. Electric Vehicles ( EV) and Fuel Cell
Vehicles ( FCV)hydroxide dissolved in a very small amount of water in an
organic solvent.
Therefore, complicated steps such as a step of

Due to Volkswagen’s clean diesel fraud, EU has

removing the alkaline component from the active

made a major shift from clean diesel to EV as anmaterial and a step of completely removing a traceenvironmental issue. Currently in EU, Sweden’s

amount of water present in the organic solvent are

Northvolt is building a Gigafactory. There are plans at

required. There is also the problem that a low dew point

several more locations and the development of lithium‒environment with as little water as possible is required.

ion batteries for EV has been actively carried out.

In addition, since an organic solvent is used, a large

Also in China, lithium‒ion battery makers such as

amount of capital investment is required, and the running

CATL and BYD are planning to expand Giga Factory incost is very high to recover and reuse the evaporatingorder to supply lithium ‒ ion batteries to automobile

organic solvent when coating.

makers around the world.

The large impact of organic solvents on the

In Japan, Toyota Motor Corporation announced that
it will produce 1 million EVs and 4.5 million HVs/PHVs

environment and the human body (special medical
examination is essential) is a major issue.

in 2025, and has a battery supply tie‒up with CATL andothers.

Since Si and SiO, which are silicon‒based high‒capacity negative electrode materials replace graphite,

In April 2020, Toyota Motor Corporation andhave extremely large volume expansion and contraction

Panasonic Corporation established a joint venture “Prime(2 to 5 times) during charging and discharging. So, only

Planet Energy & Solutions” to construct a lithium‒ion

5 to 10% of active material is currently added to graphite.

battery supply system for mass production of EVs.

There is also a problem that the performance is not fully

In addition to the globalization of EVs centered onbrought out because of limited use.

EU, it is expected that the competition for the initiative ofUnder these circumstances, we are focusing on

EV technology will begin in earnest, mainly among

making water‒based slurries of high‒nickel compounds

automobile manufacturers including Japan, the United

as next ‒ generation positive electrode active materials,

States, and China.

and silicon‒based negative electrode materials as next‒

As for fuel cell vehicles (FCVs), Toyota Motor

generation negative electrode active materials.

Corporation has developed and launched “Mirai” in

6. Water‒based slurry of next‒generated
High ‒ Nickel positive electrode active
material2) 3)Japan. In China, following EVs, FCVs are receiving large
subsidies, and development competition is intensifying.

5. Next‒generation Lib slurry

Research and development of high‒nickel positive

For in‒vehicle lithium‒ion batteries, increasing theelectrode active materials like ternary systems (NCM =capacity of batteries for the purpose of improving the

6/2/2, 8/1/1, etc.) and NCA have been developing in

cruising range has been a big issue.

order to extend the cruising range of EVs.

High ‒ capacity high ‒ nickel / ternary materials are

However, when such high ‒ nickel compounds

required for positive electrode active materials and alloy‒

contact with water, the excess included lithium hydroxidebased materials such as Si and SiO are required foris eluted and becomes strongly alkaline with pH 12 or

negative electrode active materials.

higher.

However, the high‒capacity high‒nickel compound

Since this strong alkali reacts with the aluminum foil

expected as a next‒generation positive electrode active

as a current collector to generate hydrogen, the coatedmaterial has a drawback that an electrode slurry can beelectrode becomes porous to make it impossible toproduced only with an organic solvent such as NMP.

manufacture batteries.

Further, there is a problem that polyvinylidene fluoride

In order to suppress such strong alkalization, a(PVdF) used as a binder is gelled due to lithium

method of adding a strong acid such as sulfuric acid or― 20 ―

Nihon Spindle Technical Report No. 58 2021

Technical Reporthydrochloric acid or a weak acid such as oxalic acid,slurry with a carbon dioxide gas supply jig attached.

citric acid and ammonium sulfate to neutralize has been

6.3 Preparation

proposed.

ofelectrodeslurryandelectrodes

However, in the case of strong acids such as sulfuric
acid, it is very difficult to neutralize the slurry and if it is

Add a predetermined amount of NCA, CB, VGCF

added a little excessively, it becomes strongly acidic andand acrylic binder to the JPSS‒X cup with the following

the aluminum foil for the current collector is dissolved. In

composition, NCA : CB : VGCF : acrylic binder = 92 : 3.5 :the other case of weak acids, the salt produced by the

0.5 : 4, and then supply carbon dioxide gas to prepare areactionslurry having a pH of 8.3. By the way, the pH was 12.2 in

with

Li

may

adversely

affectbattery

performance and for the ammonium sulfate, there is athe system without carbon dioxide gas.

problem of odor such as ammonia generated duringdrying. There are many problems to be solved.

When JPSS‒X is operated, the pressure inside thedevice becomes negative and carbon dioxide gas is

In this report, we were able to achieve an aqueous

sucked into the device to dissolve quickly in water withslurry of high nickel‒based active material by combining

the same effect as cavitation and neutralize. Figure 5

the cavitation effect of “JET PASTER” and carbon

shows the carbon dioxide neutralization mechanism bydioxide gas instead of the above acids to suppress strong
alkalinity.

6.1 Superiority of Carbon Dioxide gas
Even if carbon dioxide gas is added to water inexcess under normal pressure or reduced pressure, the pH
is at most 4, so it does not become strongly acidic and thealuminum foil does not dissolve even if the slurry iscoated on the aluminum foil.
As shown in Fig. 3, the aluminum foil does not reactand dissolve if the slurry has a pH in the range of 3 to 10.

Fig. 3 Aluminum foil non‒corrosion area

6.2 High Nickel active material : NCA
An example of producing a slurry neutralized with
“JET PASTER” using the strongest alkaline NCA as ahigh nickel compound will be described.
The device is JPSS‒X shown in Fig. 4 and is a smalllaboratory device capable of producing 150 to 300 ml ofFig. 4 JPSS‒X

Fig. 5 Carbon dioxide neutralization mechanism using cavitation effect― 21 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

Fig. 6 Electrode SEM after application with / without carbon dioxide neutralization

Fig. 7 Cycle characteristics with / without carbon dioxide neutralization

the cavitation effect.

6.4 Electrode characteristics

1. Supply carbon dioxide gas using the suction
power of “JET PASTER”

A CR2032 coin cell was made using NCA electrode

2. Inside of “JET PASTER”, cavitation bubbles

with Li metal as the counter electrode. The result of thecontaining carbon dioxide expand and contract.

electrode characteristics is shown in Fig. 7.

As a result, the interface volume of bubbles withcomparison, the cycle characteristics of a battery made ofwater increases much carbon dioxide gas toelectrodes prepared by using PVdF as a binder in an

dissolveorganic solvent are also shown.

rapidlyandneutralize

lithiumhydroxide.

For

Although the initial characteristics of the two water‒

3. The excess carbon dioxide gas is removed by thecavitation effect and hardly remains in the slurry,

based electrodes are similar, the deterioration is more
severe without carbon dioxide gas.
This is because the internal resistance (coating

so that it can be applied immediately after theslurry is preparedresistance and charge transfer resistance) of the

Figure 6 shows SEM of the electrodes obtained byapplying these slurries to aluminum foil and drying them.

unneutralized slurry increases significantly as the cycle isrepeated. (Fig 9)

When a slurry of pH = 12.2 without carbon dioxide

In the carbon dioxide gas‒neutralized slurry, it is

gas is applied, the aluminum foil reacts to generate apresumed that the produced lithium carbonate coats thelarge amount of hydrogen gas and make many holes. But

surface of the active material and thus suppresses theat pH 8.3, it does not react with the aluminum foil at all

reaction with the electrolyte.

and electrodes with a smooth surface and cross section
can be produced.

This can be understood from the TEM image oflithium carbonate covering the surface of the active― 22 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

Fig. 8 TEM of lithium carbonate on the surface of NCA

Fig. 9 Internal resistance of coin cell (Coating & Charge transfer resistance)material shown in Fig. 8.

However, it has a drawback that the volume

Furthermore, it is considered that the reason why the

expansion

andcontraction

duringcharging

andresistance does not increase is that carbon black is also

discharging is too big around two to three times and theincorporated in the lithium carbonate layer. From theseadhesion with the metal foil used as a current collector

facts, it is possible to easily obtain an aqueous slurry ofcannot be maintained.

high nickel‒based active material that can be applied to

Therefore, it is often used in combination withaluminum foil and exhibits good battery characteristics

graphite. However, the amount used is about 3% withby combining “JET PASTER” with carbon dioxide gas.

respect to graphite and at most about 10%. So, theFurther, even if carbon dioxide gas is applied, the high‒capacity of SiO cannot be fully utilized.

speed dispersibility of “JET PASTER” is not impaired.

An electrode was prepared and evaluated by “JETAs high nickel active materials, not only NCA but

PASTER” using SiO as a high ‒ capacity negative

also NCM622 and 811 are under development and study.

electrode active material and an aqueous polyimide

We have also found that each active material has optimalbinder.

carbon dioxide neutralization conditions.

Furthermore, full cell combined with the positive

We believe that the cavitation ‒ based “JET

electrode made of the high nickel‒based aqueous positive

PASTER” is ideal device for producing highly

electrode slurry described in the previous section were

productive, water‒based high‒nickel electrode slurries,

also evaluated.

and is fully compatible with future giga factories.

7. SiO high ‒ capacity water ‒ based
negative electrode slurry

6.5 Application of next ‒ generation high ‒capacity negative electrode active material towater‒based slurries

SiO : KB : Water‒based polyimide (PI) binder = 97‒
x : 3 : x wt% (x = 3, 5, 8, 10, 15 wt% slurry was preparedWe have also been developing water‒based slurries

with a small laboratory device (JPSS‒X) and stainless‒for next‒generation negative electrode materials such as

steel foil and the electrode performance was evaluated.

SiO.

When making a SiO slurry in an organic system, 15 to
The theoretical capacity of SiO is 2007 mAh / g

18% of PI binder is used. We changed it to 3 to 15% towhich is much larger than that of graphite 372 mAh/g. It

confirm the optimum amount of aqueous PI binder. The

is expected as a next ‒ generation negative electrodeelectrode performance was the best when 10% of thematerial.

aqueous PI binder was added. The results are shown in― 23 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

Fig. 10 Amount of water‒based polyimide binder and electrode performanceFig. 11 NCA / SiO Full Cell cycle characteristic

Fig 10.

The charge/discharge characteristics were evaluated

It is presumed that this is because the dispersibility

at 30℃ and 60℃. Both show good cycle characteristics.

was improved by the cavitation effect and a slurry having

At 60℃, the ionic conductivity of the electrolytic

good electrode performance could be produced with asolution and the ion diffusion rate of the electrodes are

small amount of aqueous PI binder. It is estimated thathigher than 30℃, so it is estimated that the capacity has

when the PI is 15%, the surface of the active material isimproved.

thickly covered and charging / discharging becomes

Full cell “NCA/SiO batteries” made from water‒difficult, so that the performance deteriorates. Since thebased slurries in this way have good cycle characteristics.

dispersibility of the conventional mixers is not so good, it

The possibility of creating water‒based slurries for high‒is considered that the electrode morphology cannot be

capacity positive and negative electrodes of lithium‒ion

maintained eve if 15 to 18% is used.

batteries has greatly expanded.

8. Full Cell consisting of high nickel
aqueous slurry and SiO aqueous slurry

We have been developing an aqueous slurry of thenext generation negative electrode active material Si
metal that does not use a polyimide binder.

By using JPSS‒X, carbon dioxide neutralized slurry

9. Application to platinum ‒ supported
carbon black slurry for polymer
electrolyte fuel cells ( PEFC) 5)

was prepared using NCA : CB : VGCF : acrylic binder =92 : 3.5 : 0.5 : 4 as a high‒capacity high‒nickel aqueousslurry composition for the positive electrode.
Similarly, for the negative electrode, a slurry was

The structure of the polymer electrolyte fuel cell

prepared using SiO : KB : aqueous polyimide (PI) binder(hereinafter abbreviated as PEFC) is shown in Fig. 12= 97 : 3 : 10.

(A) MEA for a PEFC, (B) catalyst layer structure andFull cells were assembled and evaluated using
positive and negative electrodes using these slurries. The(C) three‒phase boundary at the cathode using Pt/C anda proton.

results are shown in Fig. 11.

PEFCs have begun to spread as stationary fuel cells― 24 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

Fig. 12 (A) MEA for a PEFC (B) catalyst layer structure(C) three‒phase boundary at the cathode using Pt / C and a proton

Fig. 16 Cell properties of MEA

Fig. 13 Particle size distribution

for automobiles and homes, but there are still problems tobe solved before they become widespread.
One of the issues is the establishment of a mass
production process for a membrane ‒electrode assembly(MEA), which is the core of PEFC.
MEA has a structure in which both sides of anelectrolyte membrane are sandwiched between anode andcathode electrodes (catalyst layer and gas diffusion
layer). In MEA, the catalyst layer is the part where thefuel cell reaction occurs which is composed of platinum
nanoparticle ‒ supported carbon (Pt / C) and proton ‒conducting ionomer and the catalyst layer structure has agreat influence on the battery performance.
Therefore, as a control of the catalyst layer structure,
Fig. 14 SEM of electrode surface

the dispersion method of the catalyst slurry has beenenergetically researched and the ball mill method has
achieved high power generation performance. But theball mill method can produce only a small volume ofslurry.
In order to mass‒produce MEA, it is important to
prepare the slurry and to apply and dry the slurry to forma catalyst layer.
In this chapter, we report the results of making aslurry using “JET PASTER” in collaboration with Tokyo

Fig. 15 Pore size distribution

Institute of Technology, Prof. Yamaguchi and evaluating― 25 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

Table 2 Line‒up and How to use of “JET PASTER”

the battery characteristics. The comparison devices areformation are important for achieving high battery

commonly used ball mill and ultrasonic disperser.

performance.

The particle size distribution of the dispersion ‒From the above results, it was demonstrated that atreated catalyst slurry is shown in Fig. 13, and the SEM ishigh ‒ performance MEA can be produced by theshown in Fig. 14.

cavitation dispersion method using the swelling andFrom Fig. 13, when the ball mill and the cavitation

contraction of the cavitation bubble.

method are used, large aggregates were not found.. On

The dispersion method by cavitation can be

the other hand, in sonication, although the size of the

expected to contribute to the MEA mass production

agglomerates was similarly reduced, large agglomerates

process.

of several mm still existed.

10. Line ‒ up and How to use of “JETPASTER”

From the SEM shown in Fig. 14, sonication affected
the formation of the catalyst layer and many aggregatesand cracks were observed. On the other hand, when a ballAs shown in Table 2, we have several types “JET

mill or a cavitation method was used, a smooth catalyst

PASTER” that can respond to all kinds of applications

layer was observed.

from small laboratory equipment to mass production

From the mercury injection measurement of theequipment. In addition to Table 2, JP ‒ LL which cancatalyst layer, it was confirmed that the ball mill and the

produce 1000 to 2000 L of slurry in 1 to 2 hours iscavitation method have almost the same pore structurescheduled to be launched near future.

(Fig. 15).

1) How to use “JPSS‒X”

Fig. 16 shows the battery performance (80℃, H2/This device has a capacity of 150 to 300 ml and isair) of MEA prepared using different dispersion

for small ‒ scale production, and is for research andtreatments.

development such as composition study. Please note that

MEA using the cavitation method showed the same

it may take some time as the powder is supplied to thehigh power generation performance as the ball mill

cup little by little from a spatula or bag.

method which is an existing established technology.

2) How to use “JP‒S” and “JP‒L”
JP ‒ S and JP ‒ L are for pilot plants and mass

MEA with sonication showed lower performance than theother two dispersion methods.

production, respectively. As shown in FIG. 17,

From the electrochemical measurement of MEA, itdissolution / dispersion is promoted by circulating

was found that this difference in performance was mainly

operation with a JET PASTER through an external

due to the mass transfer resistance of oxygen gas at thestirring vessal and a pump. The powder is suckedcathode and proper slurry preparation and catalyst layer

together with air by the depressurizing force generated by― 26 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

Fig. 17 Combination of stiiring vessal with HB blade and JP

Fig. 18 Shape of HB blade

Fig. 19 Dispersion state of iodine in HB and paddle blades

the JET PASTER from the hopper. At the initial stage,

blade and the Full Zone blade and so on.

dispersion and dissolution have not yet progressed

3) Carbon Dioxide Neutralization Method

sufficiently. Therefore, if blades (paddle blade, anchor

The “JET PASTER” is a device that can easily

blade, etc.) having insufficient stirring capacity is used, aneutralize carbon dioxide gas by installing a carbon

short pass occurs in the stirring vessal. So, it is difficult todioxide gas generator (carbon dioxide gas cylinder, etc.)

obtain a uniform solution/slurry only by the performanceand a flow rate control device.

of the JET PASTER.

4) Other

For the above reasons, JP‒S and JP‒L have adopted

We believe that by supplying ultra‒dry air, argon,

the “Home Base (HB) blade” researched and developed

and nitrogen into the JET PASTER in the same way asin the Professor Kato’s Laboratory, Graduate School ofcarbon dioxide, it may be possible to produce sulfide‒based all ‒ solid ‒ state battery slurries without using a

6)Engineering, Nagoya Institute of Technology.

HB blade has the following three features.

glove box.

1. Shape : Simple

Further, since the “JET PASTER” has a structure in

2. Mixing performance : Speedy

which the powder is sucked under reduced pressure to

3. Flow : Stable

work on the dispersed portion, the suction force decreases

Fig. 18 shows the shape of the HB blade. Fig. 19

when the viscosity becomes high, so that there is an uppershows the stirring state. The left side of Fig. 19 is the HBlimit to the viscosity that can be produced.

blade and the right side is the paddle blade. Iodine can be
stirred more uniformly in the HB blade than in the paddle

Please be aware that it is difficult to handle high‒viscosity materials such as clay.

blade.

A test site “Techno Stage” has been set up in

Prof. Kato has clarified that the HB blade have theAmagasaki City, Hyogo Prefecture Japan. Evaluation

same or better stirring performance of the Max Blend

equipment such as rheometers and particle size

― 27 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

distribution analyzers are also available to prepare for

China, EU, and USA.

witness tests.

Development competition is taking place around theworld for both EVs and FCs as a departure from gasoline

11. Conclusions

engines.

By “JET PASTER” using the cavitation effect, thefollowing became clear :It may be affected by the coronavirus but we don’t
think there is any change in the big trends. We hope that

1) At the LiB positive electrode, carbon dioxide
neutralization technology has made it possible toour “JET PASTER” can make a big contribution in thefields of Lib and FC.

make an aqueous slurry of high nickel active
material.
2) For the negative electrode, high capacity wasachieved by combining a high capacity SiO
material with a less amount of water‒based PI
binder.

12. Citations
1）S. Hosokawa “2014 : Joint research report (inJapanese)” Kobe University2）K. Kimura, T. Sakamoto, T. Mukai, Y. Ikeuchi, N.
Yamashita, K. Onishi, K. Asami and M. Yanagida, :3) By combining the two electrodes, the possibility“Improvement of the Cyclability and Coulombicof developing and launching an unprecedented

Efficiency of Li‒Ion Batteries Using Li [Ni 0.8 Co 0.

high‒capacity lithium‒ion battery has expanded.

15 Al 0. 05] O2 Cathode Containing an Aqueous

Hwever, there remains the problem that it isBinder with Pressurized CO2 Gas Treatment”

difficult to use the current drying furnace for

Journal of The Electrochemical Society, 165, A16

water‒based graphite because a high temperature(2018).

of over 250℃ is required to cure the water‒based3）K Kimura, K Onishi, T Sakamoto, K Asami and M

PI binder. In order to solve this problem, we have

Yanagida ：“Achievement of the High ‒ Capacity

been proceeding with technological development

Retention Rate for the Li [Ni 0.8 Co 0.15 Al 0.05] O2

for next‒generation Si metals.

(NCA) Cathode Containing an Aqueous Binder

4) Biologging batteries has been under developmentwith CO2 Gas Treatment Using the Cavitation Effectin collaboration with the Atmosphere and Ocean(CTCE)” Journal of The Electrochemical Society,Research Institute, The University of Tokyo as an

166 (3) A5313-A5317 (2019)

application for full ‒ cell batteries consisting of4）Keiichi Asami “LIB next generated water ‒ basedslurry by high ‒ speed dispersion device withslurries produced by “JET PASTER”.
We would like to report when the data isavailable.

cavitation effect (in Japanese)” Kagaku Sochi.,No. 9. p 31-35. 2020

5) Slurries for fuel cells can also be produced with

5）Hidenori Kuroki, Keiichiro Onishi, Keiichi Asami“JET PASTER” and have good electrodeand Takeo Yamaguchi “Catalyst Slurry Preparation

characteristics.

Using a Hydrodynamic Cavitation Dispersion

By “JET PASTER”, not only the cruising range of
EV can be extended but also the initial capital investment
such as solvent recovery equipment in the battery
manufacturing

process

canbesuppressed.

Method for Polymer Electrolyte Fuel Cells” Ind.
Eng. Chem. Res. 2019, 58, 19545‒19550
6）Y Kato, H Furukawa, Y Ikeda, T Nakanishi, T Sano

The

and K Tomioka “Development of a Mixing Processenvironmental load caused by organic solvents and theUsing an HB ‒ Type Impeller to Easily Achieve

adverse effect on the human body can be reduced.

Scale‒UP by Maintaining Geometrical Similarity”

High productivity of “JET PASTER” can be
expected to reduce running costs.

International Journal of Chemical Engineering Vol
2018

We also feel great potential for application to PEFC
slurries.
We will strive to expand not only to Japan but also to― 28 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

Static elimination function of NS Dry BoothHVAC Division

MASUDA Katsuhiro
Abstract
We have developed a system that improves the capability of the current dry thermal and achieve a blowing
dew point temperature of －80℃ or less.
we will report the development and the outline of the

1. Introduction

equipment.

In the manufacturing process of lithium ‒ ion

2. Outline of Dry Thermal

batteries that are currently the mainstream in thesecondary battery market, a dew point temperature of

A dry thermal is a space‒saving low dew point air－40℃ or less is required, but it is obvious that a dew

controller with a blower, refrigerator, cooler, heater, andpoint temperature of －80℃ or less will be required indehumidifier contained in one housing. Fig. 1 shows a

the next ‒ generation solid ‒ state battery manufacturing

schematic drawing. In addition, Fig. 2 shows the layoutprocess. However, the blowing dew point temperature isof the devices described above that are contained in thelimited to －55℃ with the current dry thermal.

dry thermal.

Therefore, to meet the next‒generation solid‒state battery

3. Basic Specifications

manufacturing process, it is necessary to improve theability of the dry thermal to achieve a blowing dew pointtemperature of －80℃ or less. Consequently, we

Table 1 shows the basic specifications of the current
dry thermal.

achieved a blowing dew point temperature of －80℃ or

4. Points of Development

less by developing an air controller to dehumidify outside

It is known that the blowing dew point temperaturetemperature and combining it with the dry thermal. Here,varies depending on the amount of moisture contained in1960

air taken in that affects the dry thermal blowing dew point



1000

2000

Fig. 1 Schematic drawing of dry thermal― 29 ―

Nihon Spindle Technical Report No. 58 2021

Technical Reportreferred to as the pre dry) to dehumidify outside air(OA) taken in by the current dry thermal and verificationof improvement of the blowing dew point temperature

Regenerative
blowerRegenerative heater

performance of the current dry thermal with connectionof the current dry thermal and the pre dry (see Fig. 3).

Dehumidifier
ControlheaterWe set a goal that the blowing dew point temperature of
the current dry thermal would be －80℃ or less.

4.1 Pre Dry Basic Specifications
Cooler Process-ing
blowerRefrigerator

Table 2 shows the basic specifications of the pre dry.

4.2 Features of Pre Dry
The features of the developed pre dry are that it isFig. 2 Device layout in dry thermal

space saving, and the connection method with current dry
outside air (OA) taken in by the current dry thermal. We

thermal can be selected between two patterns (integrated

assumed that the blowing dew point temperature could be

or separated), which allows placement suitable to the

reduced if the amount of moisture of outside air could beinstallation location.

reduced and supplied to the dry thermal, and carried out
development and design of an air controller (hereinafter
Table 1. Basic specifications of current dry thermal
Name

Item

Unit

Specifications

Specifications

Blowing dew point temperature ℃ D. P. 55 ※1
Blowing dry‒bulb temperature℃ D. B. Ambient temperature －1 to ＋4

Supply air volume

m3/min16～20

Exhaust air volume

m /min8～9Outside air intake volume

m /min8～10External dimensions―

1000 W × 2000 D × 1960 H

Body material―

Steel plate3
3℃ D. B. 20～26

Ambient conditions Temperature％ R. H. 30～70

Humidity*1 The blowing dew point temperature varies depending on the ambient conditions.

Current dry thermal

Ultra-low dew point dry thermal

Outside air

Outside air

Outside air processing
air controller (pre dry)Dry thermal

Dry thermal

Regenerative exhaust

Low dew point air-55℃DP

Regenerative exhaust

Ultra-low dew point air-80℃DP or lessFig. 3 Connection schematic drawing of outside air processing air controller (pre dry)

― 30 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

Table 2 Pre dry basic specifications
Name

Item

Specification

Unit

12～15

Exhaust air volume

3

m /min2～3Dehumidifying amount

g/kg

2.5

External dimensions―

900 W × 1400 D × 1340 H

Body material―

Steel plate

Weightkg

600

Temperature℃ D. B.

20～26 ※1

Humidity％ R. H.

30～70 ※1

Processing air volume

Ambient conditions

Specification

3

m /min*1 The ambient condition range should be a wet‒bulb temperature of 19℃ or less.

Dew point temperature (℃)

Blowing dew point temperature

Blowing dew point temperature (℃)

Processing rotor exit dew point monitor4 (℃)

Target blowing dew point temperature (℃)

Blowing dew point temperature average (℃)

Fig. 4 Performance measurement resultin supply air (SA) and return air (RA) ducts to connect

5. Development Result

the pre dry and the current dry thermal. This utility unit
also allows to improve the operability of the booth

5.1 Performance Measurement Result

connection of the SA and RA ducts and to rotate the

The measurement result of the blowing dew pointconnection direction of the pre dry by 90 degrees.

temperature shows that a minimum ultimate dew point

6. Conclusion

temperature of －94. 1℃ was achieved, －90℃ was
mostly maintained during the operation for 24 hours, andWe could make supply of ultra‒low dew point dry

the target blowing dew point temperature of －80℃ or

air possible by focusing on processing of outside air taken

less was achieved. Fig. 4 shows the performancein by the current dry thermal as a necessary element tomeasurement result.

supply dry air with an ultra‒low dew point, developing anouter air processing air controller (pre dry) and5.2 Outline Drawing

combining it with the current dry thermal. Since we could

Fig. 5 shows the outline drawing of connection ofalso obtain data indicating that the blowing dew point

the pre dry fabricated in this development and the current

temperature can be decreased also in the current dry

dry thermal. This drawing shows a utility unit with bult‒

thermal alone, we believe we can propose objectively the― 31 ―

Nihon Spindle Technical Report No. 58 2021

Technical Report

Regenerative air exhaust port
Regenerative air exhaust port

Control panel

Dry thermal
Return duct

Inlet port

Fig. 5 Outline drawing of ultra-low dew point dry thermal

necessity to set up a dry thermal installation environment.

7. Related Patents
1) National Institute of Advanced Industrial Science andTechnology(AIST)andNihon

SpindleManufacturing Co., Ltd., Static Electricity Removal
Structure in Low Humidity Space, Patent No. 6376577
2) Nihon Spindle Manufacturing Co., Ltd., Dry Booth,Patent No. 6080202
3) Nihon Spindle Manufacturing Co., Ltd., Dry Booth,Patent No. 6066188― 32 ―

Nihon Spindle Technical Report No. 58 2021

Intellectual Property ReportIntellectual Property Report◆ Transition of domestically owned patent rights

7UDQVLWLRQRIRZQHGSDWHQWV

1XPEHURIFDVHV

2ZQHGSDWHQWV㸦FRQVROLGDWHG㸧



























<HDU

◆ Introduction of registered patents in 2018
【Industrial Machinery Moriyama Division】
Patent number
64266646426930
6430902

Title of the invention
Disc rotor and its manufacturing equipment, a roller, and method for manufacturing disc rotor
Screen changer
Closed kneader【Environment Division】
Patent number
64364596462453

Title of the invention
Filter cloth structure
Exhaust gas treatment device using filter cloth【HVAC Division】
Patent number
6376577

Title of the invention
Static electricity removal structure in low humidity space― 33 ―

Nihon Spindle Technical Report No. 58 2021

Intellectual Property Report◆ Introduction of registered patents in 2019
【Industrial Machinery Moriyama Division】
Patent number
65326946562504
6583884

Title of the invention
Rotating plastic processing equipment
Straining mechanism and screw extruder equipped with the straining mechanism
Spinning device and spinning molding method for cylindrical materials【Environment Division】
Patent number
66602676664847

Title of the invention
Member for protective mounting of ceramic filter
Control device and control method for injection operation of compressed air in dust collector【HVAC Division】
Patent number
66543306673702

Title of the invention
Filling plate for gas-liquid contact
Cooling tower equipped with axial flow air blower【Mixing Business Center】
Patent number
6576452
6610851
66666686671683

Title of the invention
Method for producing positive electrode slurry of non-aqueous electrolyte secondary battery andpositive electrode slurry of non-aqueous electrolyte secondary battery
Method for producing paste containing carbon
Fine particle dispersion method and fine particle dispersion device
Method and equipment for sterilization of liquid substance◆ Introduction of registered patents in 2020
【Industrial Machinery Moriyama Division】
Patent number
6751008
67591126815160
6837312

Title of the invention
Kneading state judgment system, kneading state judgment device, operation screen of kneading state
judgment system, and kneading state judgment assisting system
Rotating plastic processing equipment
Rotating plastic processing equipment, rotating plastic processing system and processing roller support
unit
Rotating plastic processing system and unit transfer wagon【Mixing Business Center】
Patent number
668742266936686698998
6707779674456968177196843894

Title of the invention
Dispersion system
Separation device and separation method
Nanoparticle synthesis device
Dispersion method and dispersion device for substance to be treated and method of producing liquid inwhich the substance to be treated generated by them and dispersion medium are mixed
Method for producing negative electrode slurry of non‒aqueous electrolyte secondary battery andnegative electrode slurry of non‒aqueous electrolyte secondary battery
Dispersion mixing device and its operation method
Liquid‒submerged plasma device― 34 ―

Nihon Spindle Technical Report No. 58 2021

Intellectual Property Report◆ Introduction of overview of notable patents

Patent No. 6583884 “Spinning device and spinning molding method for cylindrical material”[Technical field] The present invention relates to a spinning device and aspinning molding method for a cylindrical material.
[Claim 1] A spinning device for a cylindrical material, in which a cylindricalmaterial is mounted so as to cover a mandrel, and the cylindrical material isstretched and thinned by performing a squeezing process in which the cylindricalmaterial is pressed by a roller from the outer peripheral side while applying
tension in the axial direction of the cylindrical material, wherein the device has atension applying mechanism that applies tension in the axial direction of thecylindrical material via a holding portion projecting from the outer periphery of
the cylindrical material, and a support mechanism for holding the holding
portion of the cylindrical material with the tension applying mechanism, thesupport mechanism has a moving mechanism, and the holding portion of thecylindrical material can be supported in the axial direction by the moving
mechanism, and, by moving the holding portion of the cylindrical material in theaxial direction of the mandrel while being held between the tension applying
mechanism and the support mechanism, the squeezing process is performed
while applying tension in the axial direction of the cylindrical material.
Patent No. 6751008 “Kneading state judgment system, kneading state judgment device, operation screen of kneading state
judgment system, and kneading state judgment assisting system”
Ram posionMaterial
temperature

Electric power
Temperature
Ram posion[Technical field] The present invention relates to a kneading state
judgment system, a kneading state judgment device, an operation screenof the kneading state judgment system, and a kneading state judgment
assisting system.
[Claim 1] A kneading state judgment system having a kneading unit anda determination unit, wherein the kneading unit kneads a kneadingmaterial, and transmits a kneading state value indicating the kneaded
state to the determination unit, and the determination unit determines thekneading of the kneading material in the kneading unit according to theset determination conditions based on the kneading state valuetransmitted from the kneading unit, and the determination conditions
include the determination period and the state value range, and the statevalue range is set as a range for the kneading state value, and thedetermination period is a partial period in the period from the start to theend of kneading in the kneading unit, and the state value range is a range
in which the kneading state value is included in the partial period.

Electric powerStart kneading

Patent No. 6430902 “Closed kneader”[Technical field] The present invention relates to a closed kneader having a kneading tank forstoring a kneading material and a pair of rotors arranged in the kneading tank.
[Claim 1] A closed kneader having a kneading tank for storing a kneading material and a pair ofrotors arranged in the kneading tank, wherein the rotors have a cylindrical rotor shaft and a rotor
blade formed on the surface of the rotor shaft, and constitute a tangential mode in which the rotor
blades do not overlap each other between the pair of rotors facing each other, and the blade tip shear
deformation speed at the tip of the blade, in kneading the kneading material by rotating the rotors, isdefined as a value obtained by dividing the turning speed of the tip of the rotor blade by the distance
between the tip of the rotor blade and the inner surface of the kneading tank, and the shaft surface
shear deformation speed on the surface of the rotor shaft is defined as a value obtained by dividing
the turning speed of the surface of the rotor shaft by the distance between the surface of the rotor
shaft and the inner surface of the kneading tank, and the shear deformation speed ratio, which is thevalue obtained by dividing the blade tip shear deformation speed by the shaft surface shear
deformation speed, is 5.0 or more and 40 or less, and the diameter of the rotor shaft is 0.65 times ormore and 0.80 times or less the diameter of the inner surface of the kneading tank.
― 35 ―

Time

Nihon Spindle Technical Report No. 58 2021

Intellectual Property Report

Patent No. 6660267 “Member for protective mounting of ceramic filter”[Technical field] The present invention relates to a member for protective mounting of aceramic filter, for example, to a member for protective mounting of a ceramic filter, which isused in a partition wall type dust collector.
[Claim 1] A member for protective mounting of a ceramic filter, which is used for mounting aceramic filter on a thimble plate, wherein the member is constituted of a fixing member which isinterposed between the flange of the ceramic filter and the thimble plate and mounted on thethimble plate, a support member that is placed on the outer surface of the ceramic filter on the
opposite side of the flange, to support the ceramic filter, and a connecting member which
couples the fixing member and the supporting member, and the connecting member has atension adding member for adding tension in the longitudinal direction of the ceramic filter as acoupling portion in the middle or at the end of the connecting member.

Patent No. 6654330 “Filling plate for gas‒liquid contact”[Technical field] The present invention relates to a filling plate for gas‒liquidcontact, which is used as a filler in a cooling tower.
[Claim 1] A filling plate for gas‒liquid contact that exchanges heat by directcontact with air while flowing treating water along the surface of a sheet‒shaped
plate material, wherein on the surface of the plate material, an upward inclined
surface and a downward inclined surface having a zigzag shape in a verticalcross section are repeatedly formed in the vertical direction, and the rows of
upward inclined surfaces and downward inclined surfaces repeatedly formed in
the vertical direction are arranged in parallel with a phase shift in the width
direction of the filling plate for gas‒liquid contact, and, the ridgeline where theupward inclined surface and the downward inclined surface intersect is formed at
an angle with respect to the horizontal plane, and a flow resistance imparting
portion that acts as a resistance to the flow of the treating water is formed on thesurface of the plate material.
Patent No. 6576452 “Method for producing positive electrode slurry of non‒aqueous electrolyte secondary battery andpositive electrode slurry of non‒aqueous electrolyte secondary battery”[Technical field] The present invention relates to a method for producing a
positive electrode slurry of a non‒aqueous electrolyte secondary battery and apositive electrode slurry of a non‒aqueous electrolyte secondary battery.
[Claim 1] A method for producing a positive electrode slurry of a non‒aqueous
electrolyte secondary battery containing an alkali metal composite oxide,
comprising a neutralization step to neutralize an alkaline component in the slurryby introducing a carbon dioxide gas at a pressure of 0.12 MPa or more and 100
MPa or less, and a degassing step to degas inorganic carbon in the slurry as acarbon dioxide gas after the neutralization step.

Solvent (water)Acve substance, binder, etc.

Dispersion
and mixing step

Neutralizaon step

Degassing step

Posive electrode slurry― 36 ―

Carbon dioxide gas (pressurized state)

＜ Products ＞

Industrial Machinery

Dust Collector● VARIFORMA (Spinning Machines & Flow Forming Machines)● Spinning Machine for Exhaust Products● Aluminum Wheel Forming Machine● Playback NC Spinning Machine● Pulley Processing Machine● Drive Plate Processing Machine● Clutch Case Processing Machine● Special Spinning Machine and Flow
Forming Machine, Thickening Machine● Coolant Cleaning Devices● Spiclon● Clonace● Uzu Eco
● Powder Absorbing, Dissolving & Dispersion Devices (Jet Paster)● JPSS‒X (for Laboratory use)
● JPSS (for Experiment, Preproduction,
Development)● JPS (for Small lot pilot line)● JPL (High productivity)● Mixers● Double‒Arm Kneader (G・Vacuum type :GV)● Double ‒ Arm Kneader with Discharge
Valve (GB・Vacuum type : GBV)
● Double ‒ Arm Kneader ‒ Ruder (KR・
Vacuum type : KRV)● Dispersion Kneader‒Ruder (KRD)● Small Capacity Double‒Arm Kneader (S・Vacuum type : SV)● Dispersion Kneader (DS・DX・DP)● Wonder Kneader (WD)● High Speed Mixer (HS)● Mix‒Labo (ML)
● Under Mixer● Sheet Preforming Machine (SPM)● Pellet / Sheet Manufacturing Equipments● Feeder Ruder (FR)● Extruders● Twin Taper Single Extruder (2TR)● Twin Taper Screw Extruder (2TE)● Others● Hot Melt Manufacturing Machine● Rubber Cutting Machine● Batch off Machine● Bucket Conveyor (BKC)● Dust Collectors

Leifeld Metal Spinning GmbH
Spinning, Flow Forming, Necking-in and Profiling Machines for a broad
range of industries and applications :● Automotive● Wheels● Drive and Drive Train Components● Brake Components● Exhaust Parts● Pressure Vessels● Aerospace● Drive Components● Airframe Components● Pressure Vessels● Wind & Energy● Drive Components● Precision Pipes● Pressure Vessels● Pipes, Oil, Gas● Tanks● Pipes● Agriculture & Construction● Transmission Parts● Wheels● Tanks● Work Implements● Lighting● Pipes● Poles● Components● HVAC● Air‒conditioning Components● Food & Chemical● Separating Technology Components● Mixing Technology Components● Other industries● Components● For Blast Furnaces● Exhaust Gas Processing System for Electric
Furnaces● For Garbage Incinerators● Eco Pulser● Wet Dust Collector● Dust Collector Peripheral Equipments● Multi Cyclone● SP Filter● Small Dust Collector● Dustop● NS Mist Dust Collector● NS Oil Mist Dust Collector ODB● Collision Inertia Type Mist Dust Collector SMT● Electrostatic Dust Collector● Pneumatic Conveying System● Dust Treatment Equipments● Pan Pelletizing System for Fly Ash/collected
dusts

Precision Air Controller and Air Filter● Clean Room Systems● Clean Room System● Clean Room Equipments Air shower, Clean
booth, Pass box, Relief damper,
Clean supply, HEPA filter, Clean
bench, Clean unit

● Air Filter● Cooling Tower● Precision Air Controller Unit (Thermal Cube,
Thermostatic Booth)● Dry Room and Dry Booth● NS Air Filter NU Type (Charging Filter), EX
Type, P Type, PK Type, CG Type, E
Type● NS Air Filter F Series 30/30 Type, GF Type, KF
Type● NS Air Filter Selfresh (Automatic Regeneration
Air Filter)● NS Roll Filter● Open Circuit Cooling Tower (Round Shaped) :NE/NL series

SFK Co., LTD.
● Screws● Washers● Cold Headings● Special Products● Terminal Screw● Washer built‒in Screw● Samitite● Precision Screw● LH Sticks● Spring Washer● Plain Washer● Toothed Washer● Pin● Rivet● Multi‒Stage Products● Cutting Products● Pressed Products● Composite Processed ProductHead oﬃce / Oﬃce / Branch
Head oﬃce: 4‑2‑30 Shioe, Amagasaki City, Hyogo 661‑8510

TEL +81‑6‑6499‑5551

Tokyo Branch: Sumitomo Fudosan Ueno Building No. 5, 1‑10‑14 Kita‑Ueno, Taito‑ku, Tokyo 110‑0014

TEL +81‑3‑5246‑5610

Kansai Branch: 4‑2‑30 Shioe, Amagasaki City, Hyogo 661-8510

TEL +81‑6‑6499‑5830

Chubu Oﬃce : Sakae Ono Building, 1‑10‑24 Higashi Sakura, Higashi‑ku, Nagoya City, Aichi 461‑0005

TEL +81‑52‑957‑7380

Websitehttp://www.spindle.co.jp

Nihon Spindle Manufacturing Co., Ltd.
NIHON SPINDLE MFG. CO., LTD.
4-2-30, SHIOE, AMAGASAKI-SHI, HYOGO, JAPAN

〒661-8510