Rubber molding method using a frangible foam core

Details Rubber molding method using a frangible foam core Rubber molding method using a frangible foam core

1993-03-08

1994-11-08

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264221, 264225, 264226, 264317, B29C 3340

Patent

active

053624297

ABSTRACT:
A method for molding experimental, prototype and replacement parts from rubber-like materials using a frangible core wherein a core is made by coating a cavity with a mold release agent, coating the release agent with a quick set resin, pouring a two-part polyurethane resin into the cavity, sealing the cavity and allowing the polyurethane to foam, expand and adhere to the quick set resin.

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patent: 3524618 (1970-08-01), Collman et al.
patent: 3873654 (1975-03-01), Smith
patent: 3879245 (1975-04-01), Fetherston et al.
patent: 4125351 (1978-11-01), Alfter et al.
patent: 4209564 (1980-06-01), Nomura et al.
patent: 4242410 (1980-12-01), Konig et al.
patent: 4424183 (1984-01-01), Nelson
patent: 4906423 (1990-03-01), Frisch
patent: 5116557 (1992-05-01), Debaes et al.
Mold-Making Handbook, (1983) MacMillan Publishing Co., pp. 261-264.

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