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Latest update: 02/06/2020 15:39:30

Shiraishi Industry CO., LTD.

We explore the unlimited potential of plastics

We are a plastic processing manufacturer that specializes in injection molding.  We manufacture small coil bobbins for familiar electrical appliances. We are involved in the technological development of molds and dies for thermosetting molding techniques as a core.

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About Shiraishi Kogyo
Shiraishi Kogyo is a plastic processing company in Meguro Ward with 55 years of history. Specializing in injection molding, Shiraishi Kogyo produces tiny coil bobbins that are inside bicycles, TVs, smartphones, microwaves, and other everyday electrical appliances. In total, we have produced tens of millions of products.
To satisfy the advanced requests of our customers, we are constantly developing molding and die and mold technologies that are centered on the thermosetting molding technology.
Until the product is finished
Product design - die design - production
We also support molded product design from 3D data and design standards provided to us by our customers. We evaluate designs based on the die and mold standards and present our proposals to our customers for their approval.
We use appropriate machines to produce dies and molds that can be used in the creation of molded products having the quality required by our customers.
Molding prototype
We conduct trial manufacturing when using new molds to verify that the customer is satisfied with the quality of products before they enter mass production. 
Measurement evaluation (pass, fail)
We inspect measurements based on the product drawing. If there is a mistake, we correct the mold and create a new prototype.  After the trial production, we conduct in-house inspection to verify whether the product has achieved the PPM required by the customer for mass production. 
If the product does not pass the inspection, we correct the design, create a new prototype, and repeat the process until it passes the required criteria.
Molding
We produce the first piece after obtaining pre-first piece examination approval from our customers.
Terminal press-in
For the mass production of coil bobbins, HCP wire is press-fitted using the terminal press-in machine. 
Inspection - packing - shipping
We conduct sample inspection based on our in-house standards.  We wrap the product based on the wrapping standard approved by our customer and use appropriate wrapping materials to prevent any damage. If we have stock, we offer same-day shipping for customers in Japan and overseas. 

This company is recommended by the following support organizations.

Kanto Head Office, SMRJ
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