FORMDEL AF TERMOPLASTISK METERIALE

摘要

1. Moulding of thermoplastic material with at least one welding sleeve part (1) having an electrical heating device (3) for connection of the moulding part with a tubular part (2), in which the welding sleeve part (1) is formed for insertion of the end of the tubular part (2) and has on its outer periphery at least one tensioning element (4) for radial tensioning of the sleeve part (1), characterised in that a portion of the length of the welding sleeve part (2) has several radial notches (13, 14) extending in the axial direction and disposed around the periphery, and that the heating device (3) comprises two oppositely lying heating elements (3a and 3b) which are connected in parallel to one another and have the heating conductors (38) which extend in the axial direction in the form of windings.