Nozzle shut-off valve

Details Nozzle shut-off valve Nozzle shut-off valve

1976-07-06

1978-02-14

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Feed control of material en route to shaping area

137494, 425562, 425DIG225, B29F 103

Patent

active

040739449

ABSTRACT:
A nozzle shut-off valve for an injection molding machine has a plunger mounted to reciprocate in a bore so as to block the passageway of the plastic through the nozzle, a single-acting pneumatic piston and cylinder to reciprocate the plunger, to block said passageway, and a pilot passage connecting the underside of the plunger to a location upstream of the intersection of the bore and the passageway for plastic through the nozzle.

REFERENCES:
patent: 3097396 (1963-07-01), Ludwig
patent: 3270115 (1966-08-01), Nouel
patent: 3338263 (1967-08-01), Alfmeppen
patent: 3354507 (1967-11-01), Orrevad
patent: 3526929 (1970-09-01), Coupland
patent: 3690797 (1972-09-01), Garner

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