What is “FASTEC?”FASTEC is KURODA’S revolutionary Fastening and Skewing Technology thatallows assembly work to be done inside of the die during stamping.
This technology was developed into actual
working machinery by KURODA,
Japan’s leading maufacturer of precision
machinery. ”FASTEC” (Trademark reg.) stands
for Fastening, Skewing and Technology .

ＦＡＳＴＥＣ SYSTEM have ３ type of stacking method.
ＦＡＳＴＥＣ・Concavity stacking
・Sell dieLow cost・Many know-how・Handle to various shape

LASER ＦＡＳＴＥＣ
・Spot welding stacking
・Sell product (Core etc.)
Specialized to small product・Strong stacking force from small shape

GLUE ＦＡＳＴＥＣ・Glue stacking
・Sell product (Core etc.)
New technology・Possible to stack thin material・Realized to usual material

FASTEC SYSTEM Sell dieＲ

What “FASTEC”dies do ?
FASTEC dies incorporate automatic fastening, rotation, skewing, counterboring androtational skewing functions to manufacture core laminations efficiently during acontinuous press run.

１．Fastening

２．Rotation

The die forms convexity andconcavity on the lamina.
When the convexity are pressed tothe concavity in the stamping-out
process., the upper and the lower
laminas are fastened. When therequired number of laminas arefastened, they are separated witha pierced lamina.

If lamina with slightly different
thicknesses are stacked, the shape ofthe lamina will differ from thedesign.
To minimize differences caused by thethickness
ofeachlamina,
thestamping die stamps out the material
while rotating at intervals and then,by stacking the lamina, quality
products free from inclination can beproduced.

3．Skewing
Rotor cores are sometimes skewed toimprove the performance of motors.
The FASTEC die serves to skew thelamina at any angle when fastening
rotor cores.
You can choose between themachanically driven skew and thestep-motor-driven skew according to
your requirements.

LaminaNo rotation

180°rotation

４．Counterbore
The rotor shaft of a motor requirea bore with one two steps toaccommodate the bearing. The
FASTEC system is capable ofcounterboring by simply presetting
the number of lamination of A,Band C.

FASTEC PERIPHERAL DEVICESTACK HEIGHT CONTROLSYSTEM
The thickness of hoops used forstacking lamina and other parts,tend to vary. This results in anerror in the thickness of finishedproducts even if each product iscomposed of the same number ofstacked lamina. The stack heightcontrol system consisting of alamina thickness measuring sensor
and a control unit equipped withCPU serves to eliminate thisthickness error in finishedproducts to attain the designed
thickness independently of thedifference in material thickness.

5．Rotational skewing
The process is a combination of
2.Rotationg function and 3.
Skewing function. This patented
Rotational skewing high technology
has been innovated to produce
reliable products. All diefunctions are controlled throughthe control box.

CONTROL BOX
Wide range of parameters forcontrolling the FASTEC system
are available: The FC series areequipped with lamina
counting/control functions. The
HFC series are equipped withstack height control functions,etc.

The FASTEC system consists of the dies for stamping core laminations and the control box
for setting following functions.

CONSTRACTION OF FASTEC SYSTEM
Air cylinder for separating the core
Stack height measuring device
System A (Roller contact)
Dimensions (W×L):
Single row：450×630mm
Double rows：600×1140mm

Coiler

ＦＡＳＴＥＣ die

LevelerPressmachine

FCseries

HC5S
HC5W

HFCseriesﾞConverter

STACK HEIGHTCONTROL SYASTEM

FC series +HC5S/HC5W or HFC series : System A of Roller contact
HFC series ＋Converter： System B (Non-contact measuring)

Approach of motor core backward operation

INSULATOR PAINTING Purpose：Core insulate by coating
Electro painting

Press item

After coating

The application field of three kinds oflamination method.
(For core shape and steel thickness)

FASTEC: Interlocking Lamination
LASER: Laser Welding Lamination
G L U E : Glue Lamination

Barrel painting

Press item

After coating

Innovative In-die Motor Core Manufacturing System

Glue FASTEC SYSTEM
ＲSell product(core etc.)2009 Japan Excellent Manufacturing Technology Award
2009 Super Manufacturing Automotive Parts Award

Ｐｒｅｓｓ ｍａｃｈｉｎｎｅ

DieＣｏｎｔｒｏｌｌｅｒ

Silicon SteelTank

Significant Energy Efficiency Gain:
Gluing creates insulation and reduces iron loss
Better Alignment:
Lack of mechanical stress ensures high stacking accuracy
Higher Rigidity:
Gluing leads to higher rigidity and decreases vibration during rotation
Low Noise:
Flat and even fastening of steel sheets reduces wind noise

Ｄｅｃｒｅａｓｅ ＣＯ２

Glue FASTEC core is a product that can save energy andprotect environment

Glue FASTEC SYSTEM

Significant Energy Efficiency Gain ！！
Kuroda has developed a new process in which we use glue to fix steel
sheets together in a die. Glue creates insulation and reduces iron loss.
Glue FASTEC System provides high-efficiency, high-quality and precision
motor cores .

Problem of Conventional Core Manufacturing
Conventional core manufacturing (mechanical fastening and laser fastening)leads to low motor efficiency by short circuit between silicon steel.
Mechanical Fastening

Laser Fastening

Short circuits

Short circuits

Glue FASTEC System
Glue creates insulation, prevents short circuits and thus reduces
eddy current.
GlueFASTEC®

Silicon Steel(Trademark) stands for Fastening and Skewing Technology.

GlueSell product(core etc.)
High-precision small sized motor core

LASER FASTEC TECHNOLOGY is the one which is developed for mass-production of high-precisionsmall sized motor core by YAG laser in stacking lamination. The regulation of product shape has atendency not to be influenced and the small sized lamination core which can not be made so far canbe mass –produced with stable strength and quality.

CONSTRACTION OF LASER FASTECLaser controllerHigh Speed press
MachineOptical Fiber
YAG Laser Generator

Chiller Unit

Laser interception cover Optical Unit

Automatic Stacking by YAG LASER WELDINGLASER FASTEC CORE

Each lamination can be pointed and welded from the side. There is somecase that a few lamina can pointed and welded at the same time taking into
account of efficiency .

Micro-Motor Core●For vibration motor●For digital camera●For VTR camera●For printer

Laser
Laser
（Scale ：１mm）

LaminaEach Lamina

LaminaSpindle motor core
A few lamina

The amount of energy and the focus point can be controlled dependingon the thickness, shape, and material of product.

●For HDD（Scale：１mm）

KURODA PRECISION INDUSTRIES LTD
HEAD OFFICE
Kawasaki Tech Center,
580-16 Horikawa-cho, SHIMOHIRAMA, SAIWAI-KU, KAWASAKIKANAGAWA, 212-8560, JAPANTEL :81-44-555-3924
FAX: 81-44-555-5825
NAGOYA BRANCH
2-243, KAMIYASHIRO,MEITOU-KU,NAGOYA,AICHI, 465-0025,JAPANTEL: 052-771-4211
FAX: 052-772-6722
E-mail：ps_j@kuroda-precision.co.jp
http：//http://www.kuroda-precision.co.jp
MALAYSIA：KURODA PRECISION INDUSTRIES (M) SDN.BHD.
Block C & D, Lot 3, Solok Waja 3, Bukit Raja Industrial Park, 41050, Klang,Selangor, Malaysia.
TEL 60-3-33413790 (Hunting Line) FAX 60-3-33413736
CHINA：KURODA PRECISION INDUSTRIES PINGHU CO.,LTD
NO.256 Chengbei Road. Danghu Town Pinghu City. Zhejiang. P.R. China.P.C:314200
TEL 86-573-85010786 , 86-573-85010790
FAX 86-573-85014123

KND1000 2018.01