Method and apparatus for molding two-color polyurethane parts by

Details Method and apparatus for molding two-color polyurethane parts by Method and apparatus for molding two-color polyurethane parts by

1994-12-27

1997-05-13

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 455, 264102, 264240, 264245, 2643286, 2643288, 425 4R, 425130, 425173, 425543, 425546, B29C 4406, B29C 6720

Patent

active

056289448

ABSTRACT:
Provided is a method of making a multi-property polyurethane part by RIM having a surface layer and an interior layer. The surface layer and the interior layer have different properties. The pressure in the cavity of the mold is reduced and a surface forming RIM polyurethane material is injected into the evacuated cavity, whereby the surface layer of the molded part is formed by RIM. An interior forming RIM polyurethane material is injected into the evacuated cavity, whereby the interior of the molded part is also formed by RIM.

REFERENCES:
patent: 3865915 (1975-02-01), Garner
patent: 3883629 (1975-05-01), Garner
patent: 3970732 (1976-07-01), Slaats et al.
patent: 5464582 (1995-11-01), Okano et al.
patent: 5476619 (1995-12-01), Nakamura et al.
European Search Report, Sep. 1,1995.

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