This machine mainly take PVC.PP.PE as material production small caliber antophragm corrugated pipe. One time takes shape through the corresponding mold,this corrugated pipes with the inside and outside smooth; the corrugation uniform. Electric wire & electric cable threading tube;Drain pipe for washing machine;cleaner; vent-pipe; The prestressed concrete special tube etc. **6.7mm Small caliber automobile threading uses the corrugated pipe with meticulous care develop, fills the domestic gap.