Mold for molding a resin to form a complex article

Details Mold for molding a resin to form a complex article Mold for molding a resin to form a complex article

1994-03-29

1995-09-12

Mackey, James P.

Plastic article or earthenware shaping or treating: apparatus

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

With means to evacuate mold or provide controlled environment

249141, 425577, 425812, B29C 4534

Patent

active

054492858

ABSTRACT:
The mold (10) for forming an article includes a first mold member (16) with a first mold surface (24) and a second mold member (18) with a second mold surface (26). When the mold (10) is closed, the first and second mold surfaces (24) and (26) form a mold cavity (28). Lances (58) are forced into the mold cavity (28) by linear actuators (60) to pierce an article (12) and then withdrawn from the mold chamber. Each Lance (58) allows gas under pressure to escape from the article (12) through the clearance between the lance and the bore (56) in which the lance is mounted. Relieving gas pressure in the article (12) allows the mold (10) to be opened without distortion of the article and shortens mold cycle time.

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