1. Wonjezerani voliyumu ya jekeseni, yomwe ili yoyenera kwambiri popanga mankhwala opangira ma cavity.Zopangidwa molingana ndi zofunikira zosiyanasiyana, ndizopindulitsa kwambiri popanga ma CD, pabowo lakuya komanso zinthu zothamanga kwambiri za PET.
2. PET screw special signifi imawonjezera liwiro losungunuka ndi voliyumu ya jekeseni, imachepetsa kutentha kwa plasticizing, imathandizira bwino kuchepa kwa preform ndikuwongolera kuwonekera.
3. Wonjezerani mphamvu ya thimble ndi ejection stroke, yomwe ili yoyenera kwambiri popanga PET preform.