Feed screw machineThe feed screw machine consists of a shaft and blades arranged along the spiral line on the shaft. Vertical screw conveyors and tubular screw conveyors belong to special screw conveyors. The casing is a circular tube, and the centrifugal force generated by the high-speed rotation of the spiral belt animal material pushes the material towards the wall of the tube, which is then pushed upwards by the blades.