Injection molding machine and injection molding method for...

Details Injection molding machine and injection molding method for... Injection molding machine and injection molding method for...

2007-04-03

2007-04-03

Johnson, Christina (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

C264S328100, C425S209000

Reexamination Certificate

active

10477677

ABSTRACT:
The injection molding machine comprises a screw plunger (3), which rotates inside an injection unit (2), wherein the screw plunger (3) has, downstream from a metering zone a porous or permeable section (16) which can be charged with a physical expanding agent via an expanding agent feed device (18) in the screw shaft of the screw plunger (3) and which two-dimensionally introduces the expanding agent into the melt flow for molding of foamed shaped parts made of polymeric materials in an injection molding machine by an injection molding method.

REFERENCES:
patent: 3792839 (1974-02-01), Gidge
patent: 3972970 (1976-08-01), Taylor
patent: 4058297 (1977-11-01), Seufert
patent: 4357025 (1982-11-01), Eckart
patent: 5297948 (1994-03-01), Sadr
patent: 198 53 021 (2000-07-01), None
patent: 1 072 375 (2001-01-01), None
patent: 06339974 (1994-12-01), None
patent: WO 98/31521 (1998-07-01), None

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