Vorrichtung zur Herstellung eines in seiner Längsrichtung öffenbaren und wiederverschließbaren Wellrohres

摘要

The invention relates to a device (10) for producing a corrugated pipe (12) which can be opened in the longitudinal direction and closed again. To this end the corrugated pipe (12) is provided with a hooked profile (40) and a barbed profile (42) which both extend along in the length of the corrugated pipe (12). The device (10) comprises an extrusion die (14) and a corrugator (16) having first and second split-mould halves (18, 20) which along a common moulding line (22) constitute a moulding channel (32) for the corrugated pipe (12) to be produced. The first split-mould halves (18) are each provided with a radially stepped longitudinal cavity (48) presenting a first cavity (50) and an adjacent second cavity (52). The first cavity (50) serves to form the hooked profile (40) while the second cavity (52) receives an insert (54) which on its inner face (56) has a longitudinal channel (58) along which the barbed profile (42) is configured. The extrusion die (14) comprises a mandrel (78) with a plug (82). The plug (82) is advantageously configured such that it has a first raised part (92) which is assigned to the first cavity (50) and a second raised part (94) which is assigned to the longitudinal channel (58).