Method for producing foam mold

Details Method for producing foam mold Method for producing foam mold

1990-05-17

1991-12-10

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 465, 264276, B29C 6722

Patent

active

050716050

ABSTRACT:
A method for manufacturing a foam product in which a skin material and a core material having at least one opening are set on upper molding die and lower molding die, respectively, and a foaming resin material is then poured between the skin material and the core material to integrally mold them. A recess is formed on the portion of the upper molding die that corresponds to the opening of the core material. The opening of the core material is covered by an air permeable seal member adhered to the core material. The foaming resin material is then poured in a cavity defined between the molding dies.

REFERENCES:
patent: 4420447 (1983-12-01), Nakashima
patent: 4814036 (1989-03-01), Hatch
patent: 4923653 (1990-05-01), Matsuura et al.
patent: 4959184 (1990-09-01), Akai et al.
patent: 4976414 (1990-12-01), Yanagishita

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