... 360,it can strengthen the tension and evenness degree of film . screw and cylinder are all made of 38crmoal alloy, ... screw core structure, melting material extruding evenly, and blowing film smoothing.cooling equipment is a labyrinth blow pump, which has ... adopts torque motor to adjust, has the merits of smooth film, convenience operation. Optional parts: auto loaderrotary die headdouble windersair ...