B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/74 (2006.01) B29C 45/20 (2006.01)
Patent
CA 2580974
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, wherein at least a part of the electrical insulation comprises a layer of dielectric insulator material with an electrical resistance wire wound spirally thereabout and another dielectric insulator layer thereover. Also disclosed is a method for making such a nozzle which includes the steps of applying a first insulator layer, winding electrical resistance wire about the first insulator layer, applying a second insulator layer, and applying a casing layer thereover. The first and second insulating layers may be provided by spraying or through telescoping, self-supporting sleeves.
Babin Denis
Gellert Jobst Ulrich
Mold-Masters (2007) Limited
Mold-Masters Limited
Ridout & Maybee Llp
LandOfFree
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