发明授权
US4499044A Method for making a parison for blowmolding of a hollow article 失效
制造用于中空制品吹塑成型的型坯的方法

Method for making a parison for blowmolding of a hollow article
摘要:
The heated end of a parison is brought into a finish mold form to shape a finish profile suitable for setting up a closure. The parison is axially stretched by a stretch pin to pull out the heated plastic material adjacent the profile to a thinner cross section. This allows to obtain a considerable saving of weight of the plastic material.
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