Automatic screen changer extrusion referred to as the extruder, it is the use of screw pressure way to continuously plasticized material from the extruder barrel through the die mouth extrusion, so that in the molten state, after cooling stereotypes , The product extruded continuously from the die port by a traction device or a forming device is pulled onto a cutting machine for fixed length cutting. 1, automatic screen changer extrusion production line of the main components and role: extruder