Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1978-11-20
1980-06-10
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
264 51, 264DIG84, 425329, 425517C, B29D 2704
Patent
active
042072794
ABSTRACT:
A process and apparatus are disclosed for the continuous production of polyurethane foam. The invention is directed to the use of a laterally translating mold, the first portion of which has divergent side walls, including a "V"-shaped mold having divergent straight vertical side walls. A polyurethane reaction mixture is deposited at or near the apex of that mold. The deposited mixture can be a partially-expanded prefoamed fluid mixture formed, for example, by a centrifugal mixing means. Typically, the mixture is permitted to substantially complete its rise after being conveyed past the extremeties of the divergent side walls of the first mold portion. The invention contemplates use of a ratio of conveyor velocity to foam product height lower than those of the prior art. Both rectangular and circular cross sectional products can be produced.
REFERENCES:
patent: 3325573 (1967-06-01), Boon et al.
patent: 3325823 (1967-06-01), Boon
patent: 3560599 (1971-02-01), Ferstenberg
patent: 3734668 (1973-05-01), Porter
patent: 3786122 (1974-01-01), Berg
patent: 3840629 (1974-10-01), Marjoram
patent: 3870441 (1975-03-01), Petzetakis
patent: 3887670 (1975-06-01), Porter
patent: 4074960 (1978-02-01), Dockray et al.
patent: 4102621 (1978-07-01), Talbert
Anderson Philip
Reeves Brothers Inc.
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