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US 5,315,686 AGranted
Electrically heated nozzle for die casting
OwnerWilliam Caugherty, Harold Bootoninventors
Life of this patent
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Abstract
An electrically heated nozzle for use in injection molding is positionable between an injection apparatus and a die in an injection molding operation. The disclosed nozzle is formed in three sections an end cap integrally formed with a sleeve, a housing surrounding the sleeve, and a nozzle tip also surrounding the sleeve forwardly of the housing. A coil of electrical resistance heating wire is wrapped around the sleeve inside the housing. A control box is provided for varying the current flow to the coil heater wire.
Claims8
A nozzle assembly for use in metal casting, the nozzle assembly comprising:
- (a) An outer sleeve;
- (b) A unitary core member having an end cap and a core section disposed within the sleeve, the core member having a hollow cylindrical flow passage formed therethrough, the flow passage being of a constant diameter throughout the length of the core member and having an inlet and an outlet, the end cap having a rounded portion disposed adjacent the inlet of the flow passage;
- (c) a nozzle tip, the nozzle tip surrounding the core member opposite the end cap, the nozzle tip having a rounded portion adjacent the outlet of the flow passage;
- (d) A coil of electrical resistance heater wire wrapped around at least a portion of the core section;
- (e) means for regulating current flow through the heater wire to adjust the temperature of the nozzle;
- and
- wherein the curved portions of the nozzle cooperate to permit for easy insertion into a die and a furnace and to permit adjustability for varying die heights.
4 more elements
Dependencies are inferred from the claim text.