MANUFACTURE OF FLAT PARISON AND ITS DEVICE

摘要

PURPOSE:To obtain a flat parison while a slit ejecting a parison is being prevented from being deformed. CONSTITUTION:An vertically elongated cylindriclal parison 31 having a circular or regular polygonal section which is ejected from a slit formed between a die 19 of a bottom end of a parison head 20 and a mandrel 24 is provided. Just after the parison 31 is ejected from the parison head 20, the parison 31 is deformed to a flat form by passing it through a guide passage 32 wherein a circular or regular polygonal endless inlet slit 37 is provided at its upper end and a flat endless outlet slit 38 is provided at its lower end.