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US 4,333,608 AGranted
Injection molding nozzle
AssigneeEx-Cell-O Corporation
InventorJames W. Hendry
Life of this patent
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Abstract
This invention is an improved injection molding nozzle whereby the shut-off plunger is operated by a fluid and the opening of the nozzle is accomplished by the flow of plasticized material through the nozzle. A control rod internal to the nozzle controls the movement of the plunger shut-off member and is adjustable so that the amount of plasticized resin flowing through the nozzle can be accurately controlled.
Claims7
An apparatus for controlling the flow of plasticized resin through a nozzle assembly comprising:
- (a) a nozzle tip means attached to a nozzle body means, said body means affixed to a manifold means;
- (b) passage means internal to said manifold means communication with a bore in said nozzle body means and in communication with bore in said nozzle tip means;
- (c) plunger means internal to said nozzle assembly in cooperating engagement with said nozzle tip means;
- (d) a control rod means, having a longitudinal bore therein, coacting with said plunger means and forming a chamber therein;
- (e) said control rod means adjustably attached to said manifold means for controlling the displacement of said plunger means to vary the flow of plasticized resin;
- (f) said plunger means is operated to an open position by a force developed by the resin acting on a differential area of said plunger and;
- (g) said plunger is operated to a closed position by a force developed by fluid pressure in said chamber means.
4 more elements
Dependencies are inferred from the claim text.