Low-density part injection molding system

Details Low-density part injection molding system Low-density part injection molding system

2007-11-27

2007-11-27

Davis, Robert (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

With mechanical means forming or expanding pores

C425S577000

Reexamination Certificate

active

11306079

ABSTRACT:
An injection molding system (10) includes a first mold half (20) and a second mold half (22), which forms a cavity (23) with the first mold half (20). A cavity intrusion element (34) is displaceable to extend within the cavity (23). A displacement mechanism (36) is coupled to the cavity intrusion element (34). A controller (38) is coupled to the displacement mechanism (36) and controls the intrusion depth (D) of the cavity intrusion element (34) during an injection molding process. A method of forming an article includes the pressurizing of the cavity (23) within a mold (14) via a gas. A material having a blowing agent is injected into the cavity (23). The gas pressure within the cavity (23) is released. The cavity intrusion element (34) is backed out from within the cavity (23). The material is cured.

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