Cross-over nozzle system for stack molds

Details Cross-over nozzle system for stack molds Cross-over nozzle system for stack molds

2008-09-23

2008-09-23

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...

C425S572000

Reexamination Certificate

active

11836650

ABSTRACT:
A crossover nozzle system for transferring molten plastic from an inlet at the center of the stationary platen of an injection machine to the main manifold of the molding chambers of the stack molds of the injection molding machine. The nozzle system has a sprue bar, a sprue bar extension adjustably connected with the sprue bar, the sprue bar extension having a transfer chamber. The nozzle system also has symmetrically placed inlet apertures located in the sprue bar, the apertures are configured to be in fluid communication centrally with the transfer chamber in the sprue bar extension, and a shut-off surface configured to seal the transfer chamber from the inlet apertures.

REFERENCES:
patent: 4303382 (1981-12-01), Gellert
patent: 5522720 (1996-06-01), Schad
patent: 6409955 (2002-06-01), Schmitt et al.
patent: 6575731 (2003-06-01), Olaru et al.
patent: 2003/0206987 (2003-11-01), George et al.
patent: 2407163 (2004-04-01), None
patent: 2416895 (2004-07-01), None
patent: WO 2005/025833 (2005-03-01), None

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