Injection mold capable of shearing film gate within mold

Details Injection mold capable of shearing film gate within mold Injection mold capable of shearing film gate within mold

1990-10-31

1992-03-24

Heitbrink, Timothy

Plastic article or earthenware shaping or treating: apparatus

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

With preform severing means movable relative to mold

264154, 264334, 425554, 425556, 425808, B29C 4538

Patent

active

050982818

ABSTRACT:
An injection mold of the type in which a film gate of a resin is formed and in which shearing of the film gate is conducted by a movement of a gate cutter alone. The gate cutter has a stepped cylindrical form with a main cylindrical portion of a greater diameter and a coaxial end cylindrical portion of a smaller diameter. When the mold is closed, the end cylindrical portion being received in the bore of a confronting die leaving therebetween an annular gap of a radial size which determines a gate thickness. The outer peripheral surface of the portion of the gate cutter received in the bore of the die presenting a gate land.

REFERENCES:
patent: 4404160 (1983-09-01), Bonissone et al.
patent: 4738613 (1988-04-01), Eichlseder et al.
patent: 4822270 (1989-04-01), Bonissone et al.

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