... blowing machine china. 2,it is to extrude and blow PE and PO film tube. 3,Four shafts,centre winding type. film blowing machine ... china Features:This machine is mainly to LDPE, HDPE and LLDPE film if replacing the the die and air-ring ... saving. All gears nitride to insure longer service knife. Rotational die, higher frame, auto loader, magnetic hopper frame and 2 extra ...