Plastic pipe extrusion

Details Plastic pipe extrusion Plastic pipe extrusion

B - Operations, Transporting

29

C

18/758

B29C 47/88 (2006.01) B29C 47/00 (2006.01)

Patent

CA 1159210

CA30208 Abstract of the Disclosure By expanding a plastic pipe while it is still hot and expandable and thereafter shrinking the so-expanded pipe to a defined point of shrinkage where the pipe is cooled, e.g., by a water spray, it is possible to produce pipes of any diameter within a range using only one extruder die orifice. The expansion and shrinking is carried out using a double cone external mandrel. The process of the invention has the advantage of allowing the production of plastic pipe of any diameter specified by a customer without having to change the die orifice of the extruder.

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