Needle shut-off nozzle for an injection molding machine

Details Needle shut-off nozzle for an injection molding machine Needle shut-off nozzle for an injection molding machine

2007-11-06

2007-11-06

Davis, Robert B. (Department: 1722)

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...

C425S573000

Reexamination Certificate

active

11408148

ABSTRACT:
The needle shut-off nozzle is provided in a housing for delivering polymer melt to an injection molding machine or an injection molding tool. The nozzle is mounted in a channel of the housing for a flow of the polymer melt, a nozzle at an outlet of the channel, a shut-off needle guided in the channel for shutting off the nozzle, and a needle drive for moving the shut-off needle. The needle drive includes a drive cylinder inside said channel, a piston connected to the shut-off needle and a pneumatic circuit for delivering a compressed gas at a pressure greater than 50 bar to the drive cylinder to drive the piston.

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Michaeli W. et al: “Spritzgiessen Mikrozellulaerer Schaeume Vergleich Der Verfahrenskonzepte” , Aug. 2002.

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