Sprue bushing with automatically activated gate

Details Sprue bushing with automatically activated gate Sprue bushing with automatically activated gate

1988-02-16

1989-05-09

Woo, Jay H.

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...

2643289, 425567, 425569, 425574, 425577, 425588, 425DIG5, B29C 4530

Patent

active

048284807

ABSTRACT:
An injection mold having a fixed mold member and a movable mold member, a sprue bushing assembly mounted in the fixed member containing an automatically actuated gate slidably mounted therein for opening and closing the sprue hole in response to the positioning of the mold members.

REFERENCES:
patent: 3283373 (1966-11-01), Kiefer et al.
patent: 3779688 (1973-12-01), Jullien-Davin
patent: 4473347 (1984-09-01), Terashima

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