Coextrusion feedblock for making lightweight, rigid...

Details Coextrusion feedblock for making lightweight, rigid... Coextrusion feedblock for making lightweight, rigid...

B - Operations, Transporting

29

C

18/756

B29C 47/06 (2006.01) B29C 44/22 (2006.01) B29C 47/00 (2006.01)

Patent

CA 1205265

COEXTRUSION FEEDBLOCK FOR MAKING LIGHTWEIGHT, RIGID THERMOPLASTIC PIPE ABSTRACT Coextrusion feedblock apparatus for making multi- layer, lightweight pipe wherein means are provided to convert thermoplastic material into pipe or tubing having a plurality of layers. Means (12,28) are provid- ed for adjusting the feedblock apparatus to assure thickness uniformity of the inner layer of the pipe or tubing and further, means (13,30) are provided for adjusting overall wall thickness of the multilayer pipe or tubing.

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