This assembly can be used to process clean or old broken PP/PE plastics into granules that can be reused an the raw materials. The helical gear reducer made of 20CrMnTi alloy steel is applied to the extruder and the screw and cylinder are made of 38CrMoA1A alloy steel after nitrogenization treatment, which is durablelt consists of main extruder and sub-extruder ,water tank and cutting part? with alloy rotary cutter.Besidesit is optional to be collocated with drying fan.