Valve pin actuation system for an injection nozzle

Details Valve pin actuation system for an injection nozzle Valve pin actuation system for an injection nozzle

1995-08-10

1997-09-23

Heitbrink, Tim

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...

425566, B29C 4523

Patent

active

056701900

ABSTRACT:
An injection nozzle has gearing which drives a valve pin to open and close a mold gate, with a venting chamber in a nozzle body allowing vapors to escape before reaching the gearing to avoid fouling of the gearing. The valve pin is actuated by a hydraulic cylinder driving the gearing, which includes a pair of pinion gears driving gear teeth on either side of the upper end of the valve pin. An adjustable stop is provided limiting piston travel in either direction, allowing adjustment of both the closed and open positions of the valve pin.

REFERENCES:
patent: 3912133 (1975-10-01), Hehl
patent: 4373132 (1983-02-01), Vartanian
patent: 4832593 (1989-05-01), Brown
patent: 5067893 (1991-11-01), Osuna-Diaz
patent: 5141696 (1992-08-01), Osuna-Diaz

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