Method and apparatus for extruding a foamed thermoplastic...

Details Method and apparatus for extruding a foamed thermoplastic... Method and apparatus for extruding a foamed thermoplastic...

B - Operations, Transporting

29

C

18/646

B29C 67/20 (2006.01) B29C 47/06 (2006.01) B32B 5/18 (2006.01)

Patent

CA 1231213

ABSTRACT OF THE DISCLOSURE An apparatus and process for producing an improved extruded plastic material product which consists of an inner foamed thermoplastic cellular core and an outer non-porous thermoplastic skin extending along at least one side of the core. In the process, a foamable thermoplastic material is extruded through a first die outlet to produce a foamed thermoplastic material. After exiting the die outlet, a film of non-porous thermoplastic material is applied along at least one side of extruded foamed material. Next, the extruded foamed material and the non-porous film is fed through a forming die which shapes and seals the materials into the desired cross-sectional shape.

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