Gas-assisted injection molding with a carpet layer

Details Gas-assisted injection molding with a carpet layer Gas-assisted injection molding with a carpet layer

1990-11-29

1992-11-10

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264243, 264257, 264266, 264275, 264324, 2643288, 26432812, 26432813, 26432818, 26433117, 26433118, 26433119, 264516, 264572, B29C 4516, B29C 4920, B29D 2200, B32B 3100

Patent

active

051620928

ABSTRACT:
A process for injection molding a thermoplastic backing (12) or other synthetic resin to a carpet layer (14) by suspending the carpet layer (14) between two mold halves (46,48), injecting a thermoplastic resin into the mold, and injecting an inert fluid such as nitrogen into the mold at a relatively low pressure to assist in distribution of the thermoplastic resin throughout all points of the mold. The invention also relates to a synthetic resin backed carpet, which resin backed carpet may constitute a vehicle dashboard (10). The vehicle dashboard (10) can include an internal runner or rib (16) which has a hollow portion (52) formed substantially along its length, the hollow portion (52) being formed by injection of the inert fluid during the injection molding process.

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