Apparatus for injection molding

Details Apparatus for injection molding Apparatus for injection molding

1993-11-01

1995-08-01

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

249 80, 425552, 425DIG110, B29C 4573

Patent

active

054375479

ABSTRACT:
Injection molds suitable for use in injection molding, structural foam molding, low-pressure injection molding, and gas-assisted injection molding of plastic articles are described. The injection molds contain a thin metal layer contoured on its outer surface to the shape of the article to be molded, a rigid thermoset plastic material cast upon the inner surface of the metal layer and supporting the metal layer, and heat transfer elements cast within the plastic material and located adjacent to the metal layer to transfer heat for the metal layer and the plastic material. Preferably the thin metal layer is nickel, the plastic material is epoxy, and the heat transfer elements are metal chips and heat transfer tubing. The injection molds of the present invention can be prepared at considerable cost and time savings relative to conventional injection molds.

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