Method and apparatus for production of foamed thermoplastic mate

Details Method and apparatus for production of foamed thermoplastic mate Method and apparatus for production of foamed thermoplastic mate

1986-07-23

1988-05-24

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 54, 264DIG5, 366280, 366292, 425205, 425208, 425209, 425817C, B29C 6722, B29C 4750, B29C 4764

Patent

active

047464780

ABSTRACT:
A method and apparatus for the production of a foamed thermoplastic material. A cavity transfer mixer is provided between a screw extruder which melts, or fuses, the thermoplastic material, and a cooler. The cavity transfer mixer enables the formation of uniform and well mixed admixtures of a foaming agent and a thermoplastic material and, optionally, other desired additives.

REFERENCES:
patent: 2669751 (1954-02-01), McCurdy et al.
patent: 3751377 (1973-08-01), Buckner
patent: 4214862 (1980-07-01), Kolossow
patent: 4302409 (1981-11-01), Miller et al.
patent: 4419014 (1983-12-01), Gale
patent: 4436679 (1984-03-01), Winstead
patent: 4454087 (1984-06-01), Hayashi et al.
patent: 4548776 (1985-10-01), Holdredge, Jr.

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