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US 2002/0054933 A1Published application
Compact cartridge hot runner nozzle and method of making
AssigneeMold-Masters Limited
InventorsJobst U. Gellert, Denis Babin, Jonathon Fischer
Life of this patent
Estimating the term…
Abstract
The present invention provides an electrically heated nozzle for injection molding which is insulated to prevent conduction of electricity and loss of thermal transmission to the casing, with first and second electric heaters which can operate independently or simultaneously to heat the melt channel of the nozzle.
Claims4
An injection molding hot runner nozzle comprising:
- a nozzle, said nozzle having a melt channel,
- a first electric heater,
- said first heater in thermal contact with said nozzle to provide heat to said melt channel,
- a second electric heater, said second heater in thermal contact with said nozzle to provide heat to said melt channels,
- wherein said second heater is electrically independent from said first heater and wherein said first and said second heaters are electrically separated from said nozzle by at least one dielectric material.
2 more elements
An injection molding hot runner nozzle comprising:
- a nozzle,
- said nozzle having a melt channel,
- a first electric heater in thermal contact with said nozzle to provide heat to said melt channel,
- a second electric heater in thermal contact with said nozzle to provide heat to said melt channel, said second heater being electrically independent from said first heater so that said second heater may be operated simultaneously and alternatively with respect to said first heater.
1 more element
An injection molding hot runner nozzle comprising:
- a nozzle,
- said nozzle having a melt channel,
- a first electric heater in thermal contact with said nozzle to provide heat to said melt channel,
- a second electric heater in thermal contact with said nozzle to provide heat to said melt channel, said second heater being electrically independent from said first heater, so that said second heater may operate simultaneously and alternatively with respect to said first heater and said second heater overlying said first heater so that said first and second heaters thermally effect substantially the same portion of said nozzle.
1 more element
An injection molding system comprising:
- an injection manifold having manifold melt channels,
- an injection nozzle in communication with said manifold,
- a first electric heater and a second electric heater, both heaters being located in thermal contact with said nozzle,
- and at least one dielectric layer separating said first and second heaters from said nozzle.
1 more element
Dependencies are inferred from the claim text.