Continuous process and apparatus for producing foamed polymer bu

Details Continuous process and apparatus for producing foamed polymer bu Continuous process and apparatus for producing foamed polymer bu

1977-04-07

1978-12-05

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 462, 264338, 264DIG84, 425 4C, 425110, B29D 2704

Patent

active

041286111

ABSTRACT:
A process and apparatus are described for the preparation of continuous polymer foam bunstock having substantially rectangular cross-section. The novel feature comprises a panel member having its downstream end pivotally mounted above a conventional moving trough-shaped mold, the underside of said panel member floating freely in tangential contact with the rising foam in the area immediately following the gel point of said foam but before the point at which the foam is no longer sufficiently mobile to be molded without distortion of the cells thereof.

REFERENCES:
patent: 3208103 (1965-09-01), Voelker
patent: 3240846 (1966-03-01), Voelker
patent: 3354503 (1967-11-01), Joseph et al.
patent: 3553300 (1971-01-01), Buff
patent: 3984195 (1976-10-01), Del Carpio

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