Injection molding torpedo providing a fixed ring gate

Details Injection molding torpedo providing a fixed ring gate Injection molding torpedo providing a fixed ring gate

1993-04-19

1994-06-07

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

26432815, B29C 4520

Patent

active

053184343

ABSTRACT:
Injection molding apparatus wherein a torpedo is mounted at the front end of a nozzle to provide a fixed ring gate. The torpedo has an elongated central shaft with a nose portion which projects forwardly into a cylindrical opening extending through the mold to the cavity. The outer surface of the nose portion is sufficiently spaced from the inner surface of the opening to form the ring gate through which the melt flows into the cavity. The nose portion of the central shaft enhances heat transfer during the injection cycle and thus reduces cycle time and provides cleaner gates.

REFERENCES:
patent: 4279588 (1981-07-01), Gellert
patent: 4450999 (1984-05-01), Gellert
patent: 4521779 (1985-06-01), Gellert
patent: 4771164 (1988-09-01), Gellert

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