The utility model discloses a twin-screw extruder. The first screw unit and the second screw unit have the same structure. The first screw unit comprises a first main shaft, on which a first upstream conveying assembly, a first mixing assembly, a first kneading assembly, a first pressurized kneading assembly and a first downstream conveying assembly are sequentially sleeved by splines along the conveying direction; correspondingly, a second upstream conveying assembly, a second mixing assembly, a second kneading assembly, a second pressurized kneading assembly and a second downstream conveying assembly are sleeved by splines on the second main shaft along the conveying direction. An air extraction window is also arranged on the barrel, an air extraction box is fixed on the barrel, an air extraction connector communicated with a negative pressure air extraction device is arranged on the air extraction box, and a cleaning device for cleaning plastics adhered to the air extraction window is arranged in the air extraction box. The extruder can better shear and disperse plastic raw materials, reduce the generation of impurities, and facilitate the cleaning of adhered plastics while extracting air.
Country Code: CN
Application Number: CN202323260972.8
