Plastic injection molding system with multiple tip torpedo...

Details Plastic injection molding system with multiple tip torpedo... Plastic injection molding system with multiple tip torpedo...

B - Operations, Transporting

29

C

18/703

B29C 45/30 (2006.01) H05B 3/42 (2006.01)

Patent

CA 1274959

ABSTRACT OF THE DISCLOSURE A plastic injection molting system having a plurality of multiple tip torpedo heaters which each have a casing with a pair of opposed tips disposed in respective sprue passageways in a mold. An unsheathed electrical heating element is disposed in an internal bore of the casing at each tip and heat transmitting material is compacted in the bore in surrounding relation to the heating element for electrically insulating each heating element from the casing and filling all air voids between the casing and heating element to effect direct heat transfer to the casing. Electrical leads couple the plurality of heating elements to a power source to permit independent temperature control of the individual heating elements and the exposed surfaces of the respective casing tips over which fluid plastic material is directed.

526738

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