Injection molding process, resin molded product and mold

Details Injection molding process, resin molded product and mold Injection molding process, resin molded product and mold

2007-10-25

2010-11-23

Del Sole, Joseph S (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Flash or sprue removal type

C264S328900, C264S336000, C425S553000, C425S554000

Reexamination Certificate

active

07837915

ABSTRACT:
The invention provides an injection molding process, in which a gate is cut off within a mold in resin molding to obtain a good gate-cut surface, as well as a resin molded product and a resin molding mold. In the injection molding process, a cutting pin, which is connected to a cutting pin working plate provided in parallel with a driving device or an ejector plate provided in a mold, slides on a mold parting line between a fixed-side block, on which corner cutting or a R shape is provided at the approach port, and a movable-side block opposed to the fixed-side block. The wall thickness of a compression shape portion opposed to the cutting pin is larger than that of a gate and a product shape portion. The cutting pin compresses a resin in this portion toward the product shape portion at predetermined timing to cut off the gate portion and integrate the resin with the product shape.

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International Search Report and Written Opinion in PCT/JP2007/071273.
Notification Concerning Transmittal of International Preliminary Report on Patentability dated May 14, 2009, in related corresponding International Appln. No. PCT/JP2007/071273.

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