Mould for vacuum moulding a corrugated pipe, manufactured pipe and method

摘要

The shell (1) has a pattern cavity (2) for forming a half of a corrugated conduit that is made of PVC, where the conduit comprises an external diameter less than or equal to 40 mm. Rings (20) have width less than or equal to 3 mm. The cavity comprises two suction slits (21, 22) that are connected to a vacuum circuit and located on a side of a top of the rings. The slits open into one-eyed longitudinal grooves (3, 4) that are located on both sides of the cavity. The grooves open into a throat (5) that is located on a transverse face (1e) of the shell. An independent claim is also included for a method of manufacturing a corrugated conduit.