Molding machine for injection foaming

Details Molding machine for injection foaming Molding machine for injection foaming

2006-12-19

2006-12-19

Davis, Robert (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

With mechanical means forming or expanding pores

C425S400000, C425S562000, C425S208000, C264S050000, C264S051000, C264S053000, C264S328700, C366S088000, C366S089000, C366S090000

Reexamination Certificate

active

07150615

ABSTRACT:
A process for injection-foaming a thermoplastic resin by using an injection molding machine with a two-stage-compression screw, injecting a physical foaming agent into the cylinder of the machine at a pressure lower than the storage pressure of the physical foaming agent, mixing it with a melted resin and expanding the volume of the cavity of the mold at the time of injection, and an injection molding machine and resin composition suitable therefore.

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