Insulated injection molding nozzle

Details Insulated injection molding nozzle Insulated injection molding nozzle

1990-09-04

1991-09-24

Heitbrink, Timothy

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

26432815, 425568, B29C 4520

Patent

active

050510860

ABSTRACT:
An insulated injection molding nozzle having several alternating layers of stainless steel and ceramic insulating material surrounding an integral spiral electrical heating element. The coils of the heating element are wound around a central cylindrical portion of the body of the nozzle extending between larger diameter rear and forward collar portions. The alternating layers are plasma sprayed over the coil from a thin inner stainless steel layer to a thick outer stainless steel layer. The heating element and an outer shoulder portion are vacuum brazed in two stages to provide a completely integral structure.

REFERENCES:
patent: 4238671 (1980-12-01), Gellert
patent: 4687613 (1987-08-01), Tsutsumi
patent: 4837925 (1989-06-01), Gellert
patent: 4865535 (1989-09-01), Gellert
patent: 4911636 (1990-03-01), Gellert
patent: 4922082 (1990-05-01), Bredt et al.

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