B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/703
B29C 45/20 (2006.01) B29C 45/27 (2006.01) B29C 45/30 (2006.01)
Patent
CA 1266360
ABSTRACT OF THE DISCLOSURE This invention relates to a hot tip gated multi- cavity 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.
563983
4437667 Canada Inc.
Bereskin & Parr
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