LAPPINGSERVICEINNOVATOR
Company name

LSI Co.,Ltd.

President and CEO

Yosuke Mizutani

location

Head Oﬃce And Plant
3-65 Urasato, Midori-ku, Nagoya-shi, Aichi-ken,
458-0847
TEL +81-52-680-9368 FAX +81-52-680-9369
Odaka oﬃce
32-1-101 Marunouchi, Odaka-cho, Midori-ku, Nagoya-shi,
Aichi-ken, 459-8001
TEL +81-52-623-5050 FAX +81-52-623-5052
Tokyo oﬀﬁce
1-7-19-604 Morino, Machida-shi, Tokyo-to,
194-0022
TEL +81-42-794-7303 FAX +81-42-794-7304

Capital10 million yen

EstablishedMarch 25, 2010

Main Business

Mold Lapping/Polishing（Cold forging mold,Fine blanking mold, Press mold, Die cast mold Plastic
injection mold) with surface coating solution.
Stripping for carbide（round shape）
Manufacturing and Sales of mold parts and ﬁxture
with measurement
Mold repair by welding with Lapping.

http://www.lsi-lap.co.jp/

Let us lengthen theworking life of your die.

Lengthens Die
Working Life with
“Polishing Skill”
LSI is a group of experts in surface processing,including die and mirror surface polishing.
Based on our comprehensive skill in polishing diverse materials,
we are able to lengthen the working life of dies by proposing
diverse surface improvement measures and support in thecreation of the best manufacturing environment for our clients.

LAPPING SERVICE INNOVATOR
Diverse die handpolishing technology
for diverse materials
We oﬀer the polishing method
most suitable for the materialfeatures and use. Combining
know-how that we have
independently accumulated,
we contribute to improved
production eﬃciency withmirror surface polishing andprecision lapping.

Parts sales

High precisioninspection

Another feature of LSI is that
we are able to provide notjust surface polishing but
also diverse processing
technologies. Using ourwide-ranging equipment anddevices, we oﬀer our services
in the production of die parts,and the analysis and testingof trial products.

Making the utmost use ofhigh performing measuring
equipment, including coordinate
measuring machines andcontracers, we ensure
measurement precision ofproducts after polishing. Weoﬀer polishing at the micronunit and guarantees asadded value.

Mirror Finish = Improved Durability
Wear develops on dies due to an unevensurface when localized pressure isLocalized pressureon the convex partof the surface!!

Major causeof die wear

applied, which not only lowers durability
but also causes defects such as breakage
and chipping. This means that polishing

DieWorkpiece
Developmentof wear!!

the die surface is an indispensable
process for slowing down wear andlengthening working life.

Adhesive wear /aggressive wear

Expert Group on Polishing
LSI has a group of experts with experience insurface processing responding to diverse
polishing orders. We make the utmost use of
the know-how and application technologies
we have accumulated, and our experts handpolish surfaces suitable for diverse types ofsteel material. LSI oﬀers micron unit polishing
best suited for each die

using the mostadvanced measuring devices.

Craftsmen’s Skill that cannot
be Duplicated by a Machine
Surface polishing by hand requires
high skill and it is the world ofartisans with abundant knowledge
and experience that eﬀectively
combine abrasives and grindstones.
Our expert polishers use their ﬁne
skill to remove external burrs andBefore processing

polish the R area of gears tolengthen the working life of dies.

After processing

Seizure (galling)Example 1

R hand processing of ﬁne blanking die

Before processing

Example 2

After processing

R edge area improvement of bending die

Before processing

After processing●Number of shots:
20,000‒30,000

R joint isangular●Number of shots:

120,000

R joint has
become round

Example 3 Comparison of die working life by surface roughness
Processing

Unprocessed

Coating only

Coating + polishing

External photograph1.86μmSurface roughness (before coating) Rz
Surface roughness (after coating) Rz
Working life (shot)

Example 4

Before processing

LSI Co.,Ltd.

17,0000.30μm
2.33μm0.32μm

50,000130,000

Die repair (welding + polishing)

Reproduced with polishing after welding work

After processing

Head oﬃce (plant) 3-65 Urasato, Midori-ku, Nagoya-shi, Aichi-ken, 458-0847 TEL +81-52-680-9368

http://www.lsi-lap.co.jp/

LSI s strength is the outstanding polishingConsistent Proposals
from Material Selection
to Manufacturing

skills of our craftsmen and the eﬀort they

Leave it to LSI for shaping and repair ofexert in die measurement requiring micron

dies, such as R edge area processing andunit precision. LSI has diverse measuring

welding blur repair of bending dies. Ourequipment for surface roughness, hardness,

unique technology, know-how and support

angle, and device to quantify R, as well asfrom wide network of cooperating partners

high performing cutting-edge equipment

enable us to oﬀer total proposals andsuch as coordinate measuring machines andconsistent service from material selection,

contracers that enable us to ensure quality

polishing processing and die productionof our service with precision measurement.

meeting whatever your demands may be.

Ensuring Quality with
Minute Measurement【Introduction of Measuring Equipment】●Coordinate
Measuring Machine●Surface Roughness
Measuring Machine

DuraMax VAST XXTSURFCOM TOUCH 50（Tokyo Seimitsu/Carl Zeiss series）
This is a coordinate measuring machinewith small-sized high-precision scanningprobe. The machine is able to take in alarge volume of measurement data in shorttime for stability in measuring data and toreduce operator measurement errors.

●ContourMeasuring Machine
CONTRACER CV-4500
This is form measuring
equipment that canmake high-precisioncontour measurements.
Able to measure at Z
direction below 1 μm.

●CNC VisionMeasuring System
ACTIVE 202
250㎜×200㎜×150㎜

■ Processing equipment
Major Equipment
Equipment name

Maker

Quantity

NoteSMAP

Toyo Kenmazai
Kogyo, Ltd.

1Mirror shot machine

turning machine

Original

3

Hand polishing machine ø280

MinimoMinitor Co., Ltd.

10

Hand polishing machine

Turbo Lap

UHT Corporation

7

Hand polishing machine

Surface Grinding
MachineNikkoukikai, Ltd.

1

Size: 600 mm x 300 mm■ Inspection equipment / devices
Major Equipment
Equipment name
Maker

Note

Quantity

Coordinate
Measuring MachineTokyo Seimitsu

1

DuraMax VAST XXT
400 ㎜ × 400 ㎜ × 450 ㎜

Contour
Measuring MachineTokyo Seimitsu/ Mitsutoyo

2CONTOURECORD 1600D 160L
CONTRACER CV-4500

CNC Vision
Measuring System

Mitsutoyo

1

QUICK VISIION ACTIVE
202 250 ㎜ × 200 ㎜ × 150 ㎜

Surface Roughness
Measuring MachineTokyo Seimitsu

2SURFCOM FLEXSURFCOM TOUCH 50

Rockwell Hardness
TesterMisawa Seiki
Seisakusho

1

Φ63 × 100L

Digital Caliper

Mitsutoyo

30 ㎜ - 300 ㎜

High-precision
Digimatic Micrometer

Mitsutoyo

80 ㎜ - 200 ㎜

Three-point Internal
Micrometer

Mitsutoyo

126 ㎜ - 100 ㎜

Cylinder Gauge

Mitsutoyo

150 ㎜ - 150 ㎜

Right Angle
Measuring Instrument

Musashinoseiki

110 ㎜ - 360 ㎜

Pin Gauge

Eisen

1

Φ0.05 - Φ10.5

Block Gauge

Mitsutoyo

10.5 ㎜ - 100 ㎜

Internal Micrometer

Mitsutoyo

15 ㎜ - 50 ㎜

Spherical-ﬂat Anvil
Type Micrometer

Mitsutoyo

10 ㎜ - 25 ㎜

GaugesEisen and others

ｰ

Thread gauges, H7 plug gauge, nuts

Other inspection
devices

Mitsutoyoand othersｰHeight gauge, dial depth, dial caliber, etc.

LSI Co.,Ltd.

0.01 ㎜ increment

Head oﬃce (plant) 3-65 Urasato, Midori-ku, Nagoya-shi, Aichi-ken, 458-0847 TEL +81-52-680-9368

http://www.lsi-lap.co.jp/