Plastic injection mold apparatus with multiple tip torpedo heate

Details Plastic injection mold apparatus with multiple tip torpedo heate Plastic injection mold apparatus with multiple tip torpedo heate

1988-04-08

1990-04-03

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

With means to heat or cool

26432815, 425510, 425572, 425588, B29C 4522

Patent

active

049139126

ABSTRACT:
A plastic injection mold apparatus which includes a multiple tip torpedo heater in the fluid plastic flow passageway. The torpedo heater includes a pair of substantially identical tip members and a mounting collar which together define an exposed outer cylindrical surface of substantially uniform diameter with a tip at each end thereof over which the fluid plastic material may be directed at an elevated temperature. The tip members each are formed with an internal bore for receiving a respective electrical heating element, the leads of which exit the heater through the central mounting collar. The torpedo heater is retained in mounted position by means of a removable bushing, which permits relatively easy removal and replacement of the heater. The mounting collar and bushing each are formed so that an insulating air space is defined about their outer peripheries for enhancing the energy efficient operation of the molding operation.

REFERENCES:
patent: 3911251 (1975-10-01), Day
patent: 4230934 (1980-10-01), ter Beek et al.
patent: 4279582 (1981-07-01), Osuna-Diaz
patent: 4340353 (1982-07-01), Mayer
patent: 4373132 (1983-02-01), Vartanian
patent: 4376244 (1983-03-01), Gellert
patent: 4433969 (1984-02-01), Gellert
Kona-Heat Pipe Technology Brochure.
Von Ing. O. Heuel, "Werkzeugbau-Aspekte unter Berucksichtigung von Normalien", 1981.

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