PE film blowing machine with rotary die, film blower, plastic film machine SJ-55B PE film blowing machine with rotary die, film blower, plastic film machineIt ... service.2) The die is plated with hard chrome, of screw mandrel type structure with even and smooth discharging ... by torque motor, with even and smooth rewinding and easy roll changing PE film blowing machine with rotary die, film blower, ...