Extruder head for producing composite plastic tubes with...

Details Extruder head for producing composite plastic tubes with... Extruder head for producing composite plastic tubes with...

B - Operations, Transporting

29

C

18/739

B29C 47/70 (2006.01) B29C 47/06 (2006.01) B29C 47/20 (2006.01) B29C 47/28 (2006.01)

Patent

CA 1061971

ABSTRACT OF THE DISCLOSURE An extrusion head for the manufacture of a hollow string of thermoplastic material whereby the resulting product consists of two concentric layers of the material whose weld seams are staggered in relation to one another, and whose union is accomplished without the two materials being formed into separate tubular layers. Provisions are made to maintain the layers' ratio of wall thickness.

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