Removable heater for a hot runner nozzle
AssigneeMold-Masters Limited
InventorsRobert Sicilia, Denis Babin, Hans Guenther
Life of this patent
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Abstract
A heater assembly for an injection molding apparatus comprises a heater sleeve having a threaded inner surface for engaging a threaded outer surface of a nozzle body of a nozzle or a threaded surface of a mold manifold. A clamping element such as a lock nut or a spring is provided adjacent the heater sleeve. The lock nut and/or the spring abuts the heater sleeve to force the threaded inner surface of the heater sleeve into contact with the threaded outer surface of the nozzle body. This removable clamped heater assembly operates regardless of the temperature of heater.
Claims18
An injection molding apparatus comprising:
- a manifold having a manifold channel for receiving a melt stream of moldable material under pressure, said manifold channel for delivering the melt stream to a nozzle channel of a nozzle;
- a mold cavity for receiving said melt stream from said nozzle, said nozzle channel communicating with said mold cavity through a mold gate;
- and
- a heater assembly provided on said nozzle and removable from said nozzle for heating said melt stream of moldable material, said heater assembly having an outer surface and an inner surface for engaging an outer surface of said nozzle, said heater assembly further comprising a coiled heating element partially embedded into the outer surface of said heater assembly.
A heater assembly for a nozzle of an injection molding apparatus, said heater assembly comprising:
- a heater sleeve removable from the nozzle and having a threaded inner surface for engaging a threaded outer surface of a nozzle body of an injection nozzle, and an outer surface;
- and
- a coiled heating element partially embedded in said outer surface of said heater sleeve.
An injection nozzle comprising:
- a nozzle body having a nozzle channel extending therethrough, said nozzle body having an outer surface;
- a heater provided on said nozzle body and removable from said nozzle body for heating said melt stream of moldable material, said heater having an inner surface engaging said outer surface of said nozzle body and an outer surface;
- and
- a coiled heating element partially embedded in said outer surface of said heater.
Dependencies are inferred from the claim text.