Method and apparatus for producing a plastic pipe and a...

Details Method and apparatus for producing a plastic pipe and a... Method and apparatus for producing a plastic pipe and a...

B - Operations, Transporting

29

C

B29C 61/06 (2006.01) B29C 61/08 (2006.01) B29C 63/42 (2006.01) F16L 47/22 (2006.01)

Patent

CA 2143069

The invention relates to a method and an appar- atus for producing a plastic pipe, and to a plastic pipe. Worn-out pipelines are often lined by plastic pipes which often have a memory prop- erty such that they expand on heating. According to the invention, this memory property is achieved by causing a cross-linking reaction to occur in plastic material (4) in pipe forming means (1), and then passing the plastic pipe, while still hot, into a contraction mould (5). When the pipe (16) is still in a plastic state, it can be corrugated, if desired, in a cor- rugator (8) positioned after the constriction mould (5).

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