Injection mold having a valve gate system

Details Injection mold having a valve gate system Injection mold having a valve gate system

1990-10-16

1992-02-25

Heitbrink, Timothy

Plastic article or earthenware shaping or treating: apparatus

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

With means between charger and mold to cut off flow of...

249103, 425566, B29C 4523

Patent

active

050908901

ABSTRACT:
An injection mold has a valve gate system in which a valve pin is moved through a runner into and away from a gate to open and close the gate. The valve pin is inserted into the gate to close it after each injection stroke and the end face of the valve pin defines a part of the surface of an injection-molded article when the valve pin is in the gate. The end face of the valve pin is provided with a designed irregularity.

REFERENCES:
patent: 4781572 (1988-11-01), Boring

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