Manifold assembly for plastic injection molding

Details Manifold assembly for plastic injection molding Manifold assembly for plastic injection molding

B - Operations, Transporting

29

C

18/702

B29C 45/74 (2006.01)

Patent

CA 1262024

TITLE IMPROVED MANIFOLD ASSEMBLY FOR PLASTIC INJECTION MOLDING ABSTRACT OF THE DISCLOSURE A manifold assembly of the type used for conveying plastic injection molding material from a central injection point or sprue to a number of mold cavities or to multiple points within one large mold cavity. The assembly includes an integral manifold and a plurality of nozzles extending radially outward therefrom. Insulating rings are disposed about the nozzles for inhibiting heat transfer between the nozzle and the core or cavity and a stainless steel locating ring is disposed between the sprue and a support member, which supports the assembly. The locating ring inhibits heat transfer from the sprue to the support member. Aluminum plugs are disposed at the terminal ends of the manifold and inhibit heat transfer from the terminal ends. Preload pads are removably secured to the manifold radially opposite the nozzles for insulating and supporting the manifold under pressure. Heater bands supply the heat to the assembly and the temperature of the plastic injection molding material is monitored by thermocouples. The heater bands and thermocouples are disposed in zones about the assembly to facilitate more accurate monitoring of the system.

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