... of the conical twin-screw extruder, a vacuum forming machine, a traction machine, a cutter, etc. The twin-screw extruder ... .5. Optional devices: pipe end expanding device, spiral muffler tube making unit and core foaming tube making unit as required.ApplicationThe ... ,granules,profiles,film ,equipped with the vacuum forming machine,the traction machine,the cutter and the stacking frame . The conical ...