Mold having a resin well forming a weld at the union of two sepa

Details Mold having a resin well forming a weld at the union of two sepa Mold having a resin well forming a weld at the union of two sepa

1992-09-09

1994-05-24

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

With coupling between charger and mold

26432812, B29C 4518

Patent

active

053143264

ABSTRACT:
In a method of injection-molding a thermoplastic resin wherein a weld is formed in the mold cavity by the fusion of separate resin streams, use is made of a mold provided with a resin well protruding from the molded cavity or a runner on at least one of the separate resin streams at a point between where the injected molten resin is separated into streams and the weld. The resin is poured into the resin well after the formation of the weld from the feed of the molten resin into the mold cavity to cause migration of the resin at the weld, thus forcing the resin on one side of the weld into the resin of the other side of the weld to thereby strengthen the weld.

REFERENCES:
patent: 2191703 (1940-02-01), Anderson
patent: 4399093 (1983-08-01), Kirby et al.
patent: 5090886 (1992-02-01), Jaroschek

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