BLOW MOULDING MACHINE FOR CONTAINERS COMPRISING MEANS FOR ORIENTING PREFORMS IN THE MOULD

摘要

The invention concerns a blow moulding machine comprising at least a blow mould (12), wherein is introduced a preform (14) previously produced by injection moulding, and a blow nozzle (22) for injecting pressurised air into the preform (14). The invention is characterised in that it is equipped with a device for orienting the preform in the mould, said device comprising a grip member (30) adapted to grip the preform (14) by its neck (18) when it is engaged in the mould (12); a device (66) for driving in rotation the grip member (30); a device for detecting (70) at least a reference angular position of the preform (14); and control means to cause the grip member to rotate until the detecting device detects the reference angular position of the preform.