Injection molding elongated probe having integral heating elemen

Details Injection molding elongated probe having integral heating elemen Injection molding elongated probe having integral heating elemen

1988-04-27

1989-04-11

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, 425568, 425572, 425588, B29C 4520

Patent

active

048201472

ABSTRACT:
This invention relates to a hot tip gated multicavity injection molding system wherein an elongated heated probe extends centrally in a straight portion of the melt passage leading to each gate in a position wherein a tip end of the probe is centrally aligned adjacent the gate. One part of the straight portion of the melt passage is formed by a locating sleeve which is seated in the cavity plate and has spaced pins which extend inwardly to contact the outer surface of the probe to accurately locate the probe with the tip end in central alignment with the gate. Each probe has a central heating element with a double thickness portion extending to provide additional heat where the pins contact the probe. One of the pins is hollow to receive a thermocouple to measure the temperature of the melt flowing past the pins. Another part of the straight portions of the melt passage is formed by a cylindrical spacer collar which extends between the manifold and each locating sleeve to provide an insulating space of a curtain width between the manifold and the cavity plate.

REFERENCES:
patent: 4376244 (1983-03-01), Gellert
patent: 4611394 (1986-09-01), Gellert
patent: 4688622 (1987-08-01), Gellert

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