Injection molding torpedo providing fixed ring gate

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

B - Operations, Transporting

29

C

B29C 45/30 (2006.01) B29C 45/23 (2006.01) B29C 45/78 (2006.01)

Patent

CA 2091407

ABSTRACT OF THE DISCLOSURE 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.

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