Multi-layer molding method

Details Multi-layer molding method Multi-layer molding method

1998-05-26

2000-09-26

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

2643287, 2643288, 264266, 425112, 425130, B29C 4516

Patent

active

061238899

ABSTRACT:
There is provided a multi-layer molding method by which a molding product of multi-layers, in which a second layer is locally formed on a base layer, is produced, and the multi-layer molding method comprises the steps of: forming locally a cavity for forming the second layer between the first mold and the second mold; injecting a second resin into the cavity for forming the second layer so as to mold the second layer; separating relatively the first mold and the second mold from each other so as to form a cavity for molding a base layer continuously between the first and the second molds and also between the second layer and a mold surface opposing to the second layer; and injecting resin for the base layer into the cavity for molding the base layer.

REFERENCES:
patent: 4335068 (1982-06-01), Hemery
patent: 4385025 (1983-05-01), Salerno et al.
patent: 5045268 (1991-09-01), Sorensen
patent: 5094602 (1992-03-01), Morita
patent: 5618485 (1997-04-01), Gajewski

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