Plastic hollow body manufacturing method, involves correcting influence of deviation of molding process on material distribution in hollow body by intervention in molding process and/or intervention in preform-formation

摘要

The method involves correcting a nozzle clearance, which forms a preform (2), and/or mass flow rate for preform-formation, when a measured value of net weight of a plastic hollow body (10) and a control variable deviates from a reference value. Additional deviation of molding process from a defined process flow, which is considered as a reference variable, is detected. Influence of deviation of the molding process on material distribution in the hollow body is corrected by intervention in the molding process and/or intervention in the preform-formation.