Process to blow-mould plastic pipe with two sections of different diameter e.g. petrol tank filling pipe

摘要

In a process to blow mould joined sections of plastic pipe (57) in two-part form (1, 2) incorporating slides (7a, 7b; 8a, 8b), the retracted slides define first (12) and second (13) cavities in conjunction with fixed parts of the form. When the hose-like preform (35) is blown the mould forms two sections of pipe linked by a cross-piece and linked internally.