Method and apparatus for the production of polymeric foam

Details Method and apparatus for the production of polymeric foam Method and apparatus for the production of polymeric foam

1984-05-15

1986-07-22

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264 53, 264101, 264500, 425 74, 425 89, 425224, 425817R, 425DIG60, B29C 6722, B29C 3942

Patent

active

046018646

ABSTRACT:
In the production of polymeric foam in particular polyurethane foam slabstock, a mixture of foam reactants is allowed to expand in a closed mould while substantially atmospheric pressure is maintained above the upper surface of the foam. After expansion is completed, air is supplied to the foam upper surface and noxious gases in the foam are removed through one or more apertures in the lower region of the mould. Preferably, the air supplied is dry. Removed gases may be collected for re-cycling. Air may be supplied during foam expansion. Various mould aperture arrangements and means for progressively covering the mould are described.

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patent: 3011218 (1961-12-01), Mitten
patent: 3016575 (1962-01-01), Ebneth
patent: 3112524 (1963-12-01), Legler
patent: 3131426 (1964-05-01), Legler
patent: 3329759 (1967-07-01), Rice
patent: 3456047 (1969-07-01), Vinton et al.
patent: 3475525 (1969-10-01), Peters
patent: 4051211 (1977-09-01), Beser et al.
patent: 4278624 (1981-07-01), Kornylak
patent: 4328368 (1982-05-01), Salloum et al.

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