... EPS plate, as the main material, go through the die foaming extruder, calibrator, haul-off and cutting unit. With lower density, ... tandem extruders type and co-rotation parallel twin screw extruder and single screw extruder. The model is like following: 135/150single ... and 75/150 co-rotation parallel twin screw extruder and single screw extruder .Because of high mixing efficiency, co-rotation twin ...