Injection molding anti-drool nozzle

Details Injection molding anti-drool nozzle Injection molding anti-drool nozzle

2008-06-11

2010-11-02

Heitbrink, Tim (Department: 1791)

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...

C425S563000

Reexamination Certificate

active

07824175

ABSTRACT:
A shutoff nozzle body and valve assembly operative to reduce molten plastic resin drool when the nozzle body is separated from the mold or runner system. The apparatus includes a porting system that shuts off the flow of resin through the sprue plunger of the valve nozzle body before the valve body seals on the valve seat so as to permit any resin that is within the sprue passages to drain out through the sprue plunger into the mold cavity or runner system before the sprue tip completely withdraws from the mold or runner system thereby eliminating drool.

REFERENCES:
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patent: 6793480 (2004-09-01), Dominka
patent: 6835060 (2004-12-01), Sicilia
patent: 6910877 (2005-06-01), Berceanu et al.

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