Plastic molding and a method and a mold assembly for...

Details Plastic molding and a method and a mold assembly for... Plastic molding and a method and a mold assembly for...

2005-07-19

2005-07-19

Bernatz, Kevin M. (Department: 1773)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

C428S157000, C428S161000, C428S162000

Reexamination Certificate

active

06919120

ABSTRACT:
A plastic molding having high accuracy includes at least one transfer surface and at least one imperfect transfer portion having a concave or convex shape. The mold assembly includes a cavity into which molten resin is injected, a slide cavity piece which is capable of being slid at a prescribed time so that a gap is formed between the resin and the slide cavity piece, and a vent hole for supplying a compressed gas in the cavity. A method of producing the plastic molding includes the steps of heating resin to provide a molten resin, injecting the molten resin into a cavity of a molding, applying a resin-pressure to the molten resin, cooling the resin, sliding the slide cavity piece, and opening the mold assembly.

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