Apparatus for the manufacture of compound pipes

Details Apparatus for the manufacture of compound pipes Apparatus for the manufacture of compound pipes

B - Operations, Transporting

29

C

B29C 47/20 (2006.01) B29C 47/08 (2006.01) B29D 23/00 (2006.01)

Patent

CA 2605793

An apparatus for the manufacture of compound pipes with an oval cross--section is equipped with mould halves which advance in a direction of pro-duction and of which two at a time combine as a pair on a moulding path to form one mould. An injection head of at least one extruder is arranged up--stream of the moulding path. An external nozzle used for the creation of an external tube is substantially circular in shape and is located at a distance upstream of the moulding path. An internal nozzle with a cross-section similar to the oval cross-section of the pipe to be created is located inside the moulding path. When entering the moulding path, the external tube ex-truded through the external nozzle is expanded in one direction and pressed together in a direction which is perpendicular to the former.

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