This machine completes the set with plastic filament wiredrawing machine ,rolls the filament from wiredrawing machine into yam bag for circular looms`raiding. The quality of yam bag directly impsirs the braiding .so this factory improves this machine in many ways. Key parts: reciprocating screw, taking nitrogen treatment and increasing a servece life. The movement of reciprocating screw produces a definite interspace to impair the quality of yam bag ,this factory specially reforms it to remove interspace , so the head mounts durable hard alloy. The system of oil supply takes timing pump oil of electric control. Because the speed of torque motor is not united in market, per machine passes through test and the speed is lined basically , be able to use it at that time.