... striped film blowing machine Set is composed with two screw stems and cylinder with one die head, it adopts the device of two ... motors, two cylinders and one layer die head, feeding by two cylinders. Extruding with one die head one traction and rewinding device, it ... durable service. 3.The die head is plated with hard chrome, of screw mandrel type structure with more uniform and smooth discharging, the ...