Injection process for making a moulding completely...

Details Injection process for making a moulding completely... Injection process for making a moulding completely...

2011-07-12

2011-07-12

Del Sol, Joseph S (Department: 1743)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

C264S045200, C264S045400, C264S045500

Reexamination Certificate

active

07976749

ABSTRACT:
An injection moulding process for making a completely recyclable, multilayered article which contains:i) a rigid layer formed of a thermoplastic polymer andii) a foamed skin layer formed of a thermoplastic polymer compatible with the material of the rigid layer, byinjection moulding of the rigid layer into a mould composed of two sides,lifting one side of the mould, or change one side of the mould to obtain a small gap of between 3 to 4 mm between the rigid layer and the side of the mould lifted or changed andinjecting the foamed skin layer into the gap formed in step b).

REFERENCES:
patent: 4321341 (1982-03-01), Neuberg et al.
patent: 2001/0029137 (2001-10-01), Popp
patent: 2003/0001411 (2003-01-01), Gedritis et al.
patent: 2003/0162001 (2003-08-01), Rosch et al.
patent: 2004/0018337 (2004-01-01), Hus et al.
patent: 2005/0064141 (2005-03-01), Flaig et al.
patent: 2005/0183897 (2005-08-01), DePue
patent: 10003595 (2001-08-01), None
patent: WO-96/33060 (1996-10-01), None
patent: WO-97/48537 (1997-12-01), None

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