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US 7,703,188 B2Granted
Thermal shroud and method of making same
AssigneeMold-Masters (2007) Limited
InventorMurray Feick
Life of this patent
Estimating the term…
Abstract
An injection molding hot runner nozzle and a method of making such a nozzle are disclosed that improves heat transfer along the length of the nozzle. The nozzle includes a nozzle body and a heating element located on an outer surface of the nozzle body having a form-fitting thermally conductive shroud that conforms to a profile of the nozzle and the heating element.
Claims14
A method of making an injection molding hot runner nozzle, comprising:
- providing a nozzle body having a heating element disposed on an outer surface of said nozzle body;
- disposing a tubular thermal shroud preform over said nozzle body and said heating element to form a subassembly;
- and
- subjecting said subassembly to pressurized fluid to cause said thermal shroud preform to deform such that it intimately conforms to a profile of said nozzle body and said heating element to become a thermal shroud wherein the thermal shroud has inner and outer diameters that vary along the length of the thermal shroud to generally match the profile of the nozzle body and the heating element there under.
1 more element
A method of making an injection nozzle comprising:
- providing a nozzle having a nozzle body with a groove in an outer surface thereof;
- providing a heater element that is fully disposed within the nozzle body groove;
- locating a tubular shroud preform over said heater element and said nozzle body to form a nozzle subassembly;
- placing said nozzle subassembly into a pressure vessel;
- and
- applying a fluid pressure to said nozzle subassembly in order to deform and contour said tubular shroud preform over said nozzle body and said heater element to thereby form a thermal shroud having an intimate form fit over said nozzle body and said heating element whereby an inner surface of the thermal shroud makes contact with the heating element within the groove below the outer surface of the nozzle body and an outer diameter of the thermal shroud varies along the length of the thermal shroud.
3 more elements
Dependencies are inferred from the claim text.