Process for injection moulding multilayered articles

Details Process for injection moulding multilayered articles Process for injection moulding multilayered articles

1989-05-19

1990-12-18

Woo, Jay H.

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

2643288, 4251311, 425542, B29C 4502, B29C 4516

Patent

active

049784935

ABSTRACT:
The invention relates to a process for injection molding articles having a number of layers of different plastic materials that are sequentially and/or coaxially injected, in plasticized form, into a mould. Prior to injection, the different plastic materials are brought into a hollow chamber in a preselected order and amounts, with the aid of separate injection units or by means of a distributor, which is made of elementary modules, each of which is capable of creating a certain combination and configuration of plastic materials in the chamber. The contents of the chamber are then injected into the mould.

REFERENCES:
patent: 3716612 (1973-02-01), Schrenk
patent: 3864069 (1975-02-01), Takiura
patent: 3920366 (1975-11-01), Randall
patent: 4029841 (1977-06-01), Schmidt
patent: 4511528 (1985-04-01), Kudert
patent: 4701292 (1987-10-01), Valyi
patent: 4715802 (1987-12-01), Arai
patent: 4749536 (1988-06-01), Farrell
patent: 4772195 (1988-09-01), Touchet

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