There is a circular sieving system inside the body. The sieve is fixed with a rotor shaft and driven by the motor. There is a goods outlet bunker and waste product bunker at the bottom of the body. It separates all kinds of large structured objects that may be in the semi-finished product. The angled structure of the screen allows unwanted objects to slide through the sieve to go to the waste product bunker. In this way, raw materials, semi-finished products and products can pass through the sieve wire.