Injection mold apparatus with gas ejection

Details Injection mold apparatus with gas ejection Injection mold apparatus with gas ejection

1985-08-23

1987-03-31

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

With product ejector

249 66A, 264335, 425351, 425437, B29C 4543

Patent

active

046539972

ABSTRACT:
The present invention provides an injection mold apparatus for plastic piece molding. The apparatus includes male and female body parts and a gas blow-off ejection system for ejecting pieces formed on the male body part. The blow-off system includes side and top opening vents in the male body part for initial release and slight lifting of the piece and a further bottom positioned final blow-off vent, which is covered by slideable means during introduction of the plastic to the mold to prevent the plastic from flowing into the final blow-off vent and which is only exposed when required for completing blowing of the piece from the male body part. The slideable means has a slide tolerance to substantially eliminate flowing of the mold material therearound while being readily slideable when required for exposure of the blow-off vent to the male body part.

REFERENCES:
patent: 2396406 (1946-03-01), Anderson
patent: 2739349 (1956-03-01), Strauss
patent: 2773284 (1956-12-01), Kelly
patent: 2929105 (1960-03-01), Starck et al.
patent: 3183292 (1965-05-01), Dvoracek
patent: 3660002 (1972-05-01), Morroni
patent: 4009978 (1977-03-01), Hanning
patent: 4155698 (1979-05-01), Aichinger
patent: 4375948 (1983-03-01), von Holdt
patent: 4431397 (1984-02-01), Fried et al.
patent: 4438065 (1984-03-01), Brown

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