Skinned double wall pipe and apparatus for making same

Details Skinned double wall pipe and apparatus for making same Skinned double wall pipe and apparatus for making same

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 9/133 (2006.01) B29C 47/06 (2006.01) B29C 47/12 (2006.01) F16L 9/18 (2006.01) F16L 11/15 (2006.01)

Patent

CA 2162622

An extrusion die for making skinned double wall pipe has an elongated tubular body into which flowing plastic is injected. The tubular body has first and second plastic flow channels in which the first flow channel guides the flowing plastic to a first extrusion orifice in the die for making outer pipe wall and the second flow channel guides the flowing plastic to a second extrusion orifice in the die for making the inner pipe wall. The die also includes an injection opening to at least one of the plastic flow channels through which further plastic is injected to form the skin on the pipe.

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