Mold having air-venting grooves

Details Mold having air-venting grooves Mold having air-venting grooves

2010-07-22

2011-12-27

Heitbrink, Timothy (Department: 1744)

Plastic article or earthenware shaping or treating: apparatus

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

With coupling between charger and mold

C264S102000, C264S328800, C425S812000

Reexamination Certificate

active

08083516

ABSTRACT:
A mold includes a parting surface, runners, mold cavities, gates and primary air-venting grooves defined in the parting surface. The gates connect the respective runners to the corresponding mold cavities. Each primary air-venting groove includes an air-receiving groove portion and an air-venting groove portion in communication with the air-receiving groove portion. The air-receiving groove portion communicates with the gate and surrounds the corresponding mold cavity. The air-venting groove portion extends to and terminates at a corresponding edge of the parting surface.

REFERENCES:
patent: 7625199 (2009-12-01), Jahn et al.
patent: 7956471 (2011-06-01), Eu et al.

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