Process for the continuous extrusion forming of a plastic...

Details Process for the continuous extrusion forming of a plastic... Process for the continuous extrusion forming of a plastic...

B - Operations, Transporting

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B29C 47/06 (2006.01) B29C 44/22 (2006.01) F16L 9/12 (2006.01) F16L 9/14 (2006.01) B29C 47/00 (2006.01)

Patent

CA 1167218

08-12-0398 A PROCESS FOR THE CONTINUOUS EXTRUSION FORMING OF A PLASTIC DOUBLE-WALLED FOAM-CORE CONDUIT ABSTRACT OF THE INVENTION The invention relates to a process for the continuous extrusion forming of a thermoplastic double-walled, foam-core conduit by the sequen- tial steps of extrusion forming an inner plastic tube, evenly coating said inner tube with foam- core layer and extrusion forming and bonding an outer tube in contact with said foam-core layer, said outer tube being generally evenly spaced apart from said inner tube by said foam-core layer providing a plastic double-walled, foam- core conduit.

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