Process for producing multi-layer mouldings

Details Process for producing multi-layer mouldings Process for producing multi-layer mouldings

1991-01-25

1993-08-17

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264 85, 425112, B29C 4516

Patent

active

052366570

ABSTRACT:
The production of multi-layer mouldings (17) from a sheet (6) injection-moulded behind with a resin can be simplified by the sheet (6) being deformed in an injection mould by means of a fluid pressure medium, in particular nitrogen, at at least 20 bar and the deformed sheet (6) injection-moulded behind with resin directly thereafter in this injection mould, a pressure keeping the deformed sheet (6) in position being maintained during the injection-moulding behind.

REFERENCES:
patent: 4675141 (1987-06-01), Kumazaki
patent: 4917594 (1990-04-01), Gellert et al.
patent: 4942006 (1990-07-01), Loren
patent: 5000903 (1991-03-01), Matzinger et al.

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