Method of making a multilayer injection mold

Details Method of making a multilayer injection mold Method of making a multilayer injection mold

1991-06-13

1993-11-09

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...

264225, 264226, 264255, 2642791, B29C 3340

Patent

active

052600149

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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