Die apparatus for forming corrugated pipe

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 47/00 (2006.01) B29C 47/12 (2006.01) B29C 47/20 (2006.01) B29D 23/00 (2006.01) B29C 47/56 (2006.01) B29C 49/00 (2006.01)

Patent

CA 2485798

Die apparatus configured for forming corrugated pipe from thermoplastic material in association with transported wall mold sets defining a wall forming tunnel. The apparatus employs two homogenizer stations, a first at its entrance for providing homogenized material to an outer wall delivery channel extending to an outer wall extrusion nozzle. Plastic material is delivered under pressure along a heated internally disposed extender pipe to a liner homogenizer stage located downstream and feeding a liner extrusion nozzle. An access region is made available between the outer wall extrusion nozzle and the liner extrusion nozzle.

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