PVC pipe production line is mainly used in the production of water supply and drainage pipes , which used for agriculture and construction , cable coating and other fields , the complete line is consisted of extruder , vacuum calibrator , hauling machine ,cutter and tipping rack , hauling machine unit has come ways of hauling , such as caterpillar type, three-claw type , four-claw type , six-claw type and so on . there are also knife-lifting cutter and planetary cutter