Injection molding cooling core having spiral grooves

Details Injection molding cooling core having spiral grooves Injection molding cooling core having spiral grooves

B - Operations, Transporting

29

C

B29C 45/73 (2006.01)

Patent

CA 2255798

Injection molding apparatus with each elongated cooled mold core (10) having a hollow elongated inner part (78) inside a hollow elongated outer part (80) and an integral dome shaped front cap (132). The outer surface (120) of the inner part (78) and the inner surface (126) of the outer part (80) each having cooling fluid conveying grooves (122, 128) which spiral in opposite direction. This provides very uniform cooling and forces the cooling fluid flow through the grooves (122, 128) to be very turbulent which increases cooling efficiency. It also gives the mold cores (10) additional structural strength to withstand higher injection pressures.

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