The present invention discloses a multi-stage vented extruder and a usage method thereof. The extruder comprises a motor, a speed reducer, a barrel assembly, a screw assembly and an extrusion head. The barrel assembly comprises a first barrel, a second barrel and an auxiliary barrel connected between the first barrel and the second barrel, and the auxiliary barrel is further provided with a vent. The screw assembly comprises a main screw, an auxiliary screw, a central screw and a plurality of planetary screws. The main screw is rotatably arranged in the first barrel, the auxiliary screw is rotatably arranged in the second barrel, and the central screw and the planetary screws are rotatably arranged in the auxiliary barrel. The plurality of planetary screws are distributed outside the central screw and meshed with the central screw respectively, and the central screw is connected between the main screw and the auxiliary screw. The motor shaft of the motor is connected with the main screw through the speed reducer. The invention realizes the elimination of a pre-crystallization dryer, thereby reducing energy consumption for pre-crystallization and drying in the early stage of material processing and of the multi-stage vented extruder, and improving production efficiency.
Area Code: CN
Application Number: CN202111052119.X
