... production line is mainly used in PVC door & window profiled material, wide door plate, window plate, extrusion of multi-holes pipe ... conical) screws extruder of different specifications can be chosen together with corresponding vacuum calibrating table, haul-off unit, cutting unit, ... -meter, 6-meter, 8-meter, 11-meter, etc. With twin parallel screws extruder, it is particularly suitable for high ...