Patent ID: 6155815
Filing Date: 2000-12-05
Classification: B29C

Abstract:
An integral heated molding nozzle device for maintaining at a controlled elevated temperature material passing through an orifice therein, said device comprising, in combination:(a) an electrical heating element,(b) lead wires extending from said heating element electrically connecting said heating element to a power source,(c) a heat conductive nozzle body, said body(i) having said orifice axialy arranged in said body surrounded by said heating element in heat transfer relation with said heating element,(ii) said heating element adapted to effect direct heat transfer to said orifice from said heating element,(d) said lead wires exiting said body remote from said orifice,(e) said body comprising(i) a central heat transfer core through which said orifice extends,(ii) a ceramic core surrounding said central heat transfer core,(iii) a length of resistance wire windings on said ceramic core, and(iv) a cover overlying said cores,(f) said body containing electrical insulating material surrounding said heating element for electrically insulating said heating element from said body, and(g) interfitting corresponding groove and rib means extending axially in the direction of intended flow of material passing through said nozzle body, and said interfitting corresponding groove and rib means are on an outer surface of said central heat transfer core and an inner surface of said ceramic core to correspondingly interfit said central heat transfer core and said ceramic core.