... ,PPR,PE,PVDF pipe fitting injection machine 2.with CE PVC ,PPR,PE,PVDF pipe fitting injection machine with CE 1. PVC raw material ... causticity gas. 2. Special design PVC screw for Injection molding machine to produce PVC pipe fitting, smaller compress ratio to suitable ... into not plasticizing PVC raw material and barrier-type mixed water stage for anterior designing as to improve mixed effect. Screw ...