Structural foam molding process

Details Structural foam molding process Structural foam molding process

1979-07-18

1981-03-10

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 50, 264 51, 2643281, 264DIG83, 425 4R, 425564, B29D 2700

Patent

active

042553687

ABSTRACT:
A process is disclosed for molding a foamed thermoplastic article characterized by a foamed core, a non-foamed exterior shell and a surface that reproducibly and faithfully replicates a predetermined portion of the inner surface of the mold in which the article is made, wherein a foamable mixture comprising molten thermoplastic material and blowing agent is introduced through a nozzle into a mold cavity defined by said inner surface of said mold and expands and is rigidified while in said mold cavity.

REFERENCES:
patent: 3773873 (1973-11-01), Spaak et al.
patent: 3960996 (1976-06-01), Balevski et al.
patent: 4129635 (1978-12-01), Yasuike et al.

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