Injection molding apparatus having separate heating element...

Details Injection molding apparatus having separate heating element... Injection molding apparatus having separate heating element...

B - Operations, Transporting

29

C

18/710

B29C 45/74 (2006.01) B29C 45/27 (2006.01)

Patent

CA 2030287

Apparatus for thermal gated injection molding having a cavity forming insert separate from the heated nozzle. The cavity forming insert has a combination of heating and cooling extending around a central melt bore leading to a gate. The cavity forming insert has an integral electric heating element with an inner portion having a number of adjacent coils near the gate. Power to the heating element is switched on and off during the thermal gated cycle, and the combination of heating and cooling in the cavity forming insert improves the thermal response and shortens the cycle time.

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