Mold making method

Details Mold making method Mold making method

1987-10-19

1990-05-15

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

264137, 264219, 264225, 264258, 2491141, 249134, B29C 4122

Patent

active

049256114

ABSTRACT:
A method of making molds which is easy, quick and can be accomplished at room temperatures and atmospheric pressures. The method includes applying at least one layer of gel to a male mandrel and curing at least one layer of polyester impregnated fabric to the gel layer. At least one layer of epoxy impregnated fabric is cured to the polyester impregnated fabric. At least one layer of plaster impregnated is cured to the epoxy impregnated fabric. At least one layer of epoxy impregnated fabric is cured to the plaster impregnated fabric. The resulting mold is removed from the male mandrel.

REFERENCES:
patent: 2956916 (1960-10-01), Voss
patent: 3041131 (1962-06-01), Juras
patent: 3064314 (1962-11-01), Gagne
patent: 3242247 (1966-03-01), Watson
patent: 3317178 (1967-05-01), Kreier
patent: 3427689 (1969-02-01), Windecker
patent: 4073049 (1978-02-01), Lint
patent: 4675061 (1987-06-01), Mead
patent: 4834929 (1989-05-01), Dehoff et al.

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