Method and device for forming flanges on plastic pipe

Details Method and device for forming flanges on plastic pipe Method and device for forming flanges on plastic pipe

B - Operations, Transporting

29

C

B29C 57/00 (2006.01) B29B 13/02 (2006.01) B29C 63/34 (2006.01) B29C 70/84 (2006.01) F16L 58/18 (2006.01) B29C 67/18 (1990.01)

Patent

CA 2081097

A method aid apparatus are shown for forming a flange on pan end of a plastic pipe liner of the type used to line a tubular member. A reinforced disc hawing a rigid portion and an elastomeric portion is placed about the liner exterior and moved into position flush with the flanged end of the tubular member. A retaining ring is placed about the reinforced disc and the disc and liner exposed end are heated to render the materials malleable. A forming unit is then used to apply force to the liner to flow tine liner into a reformed shape having a greater external diameter than the remainder of the liner. The forming operation also bonds the reinforced disc to the reformed liner end to further resist any tendency of the liner end to be retracted into the interior of the tubular member.

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