Open mold molding

Details Open mold molding Open mold molding

2005-05-10

2005-05-10

McDowell, Suzanne E. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

With internal application of fluid pressure

C425S130000

Reexamination Certificate

active

06890478

ABSTRACT:
A method and system for producing thin walled plastic products with hollow rib members using gas-assisted plastic injection molding. The mold is allowed to open a predetermined distance as the gas is injected into the plastic material in the mold cavity. A plurality of post members, such as ejector pins, are located on a biased ejector frame and maintain their positions relative to the mold cavity in order to form solid portions or areas in the molded part.

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