Method and apparatus for forming thermoplastic foams

Details Method and apparatus for forming thermoplastic foams Method and apparatus for forming thermoplastic foams

B - Operations, Transporting

29

C

18/661

B29C 47/94 (2006.01)

Patent

CA 1103872

ABSTRACT OF THE DISCLOSURE Process and apparatus for the preparation of foam articles by extruding a heat-plastified foamable gel through a die orifice into a zone of reduced pressure in a shaping channel wherein the gel is supported on a cushion of gas at the die face and at least in the area of the channel near the orifice of the die and a restraining force is applied to the foam in the area where the foam surface has cooled to provide foams having an enlarged cross-sectional area. 18,510-F

317777

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