Heated injection molding nozzle with alternate thermocouple bore

Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool

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2642972, 2643288, 26432815, 425568, 425572, 425588, B29C 4520

Patent

active

053262514

ABSTRACT:
A heated injection molding nozzle having a melt channel which branches outwardly to several spaced edge gates. The nozzle has alternate thermocouple element receiving bores spaced longitudinally along a temperature gradient extending between the heating element and the front end of the nozzle. The nozzle facilitates the temperature control of materials having different thermal characteristics. When molding an amorphous material, a temperature somewhat lower than the prescribed operating temperature is desirable so the thermocouple element is mounted in the rearward bore closer to the heating element. If it is critical to maintain the temperature of the melt near the prescribed operating temperature for a material such as a crystalline material, the thermocouple element is received in the forward bore further along the temperature gradient from the heating element.

REFERENCES:
patent: 4768283 (1988-09-01), Gellert
patent: 4981431 (1991-01-01), Gellert

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