The material enters the sand making machine from the feed hopper, and the material is divided into two parts through the distributor, and a part enters the impeller rotating at a high speed from the middle of the distributor, and is rapidly accelerated in the impeller, and its acceleration can reach hundreds of times of gravity acceleration. Then it is ejected from the three uniformly distributed flow channels of the impeller at a speed of 60-70 meters per second.
It is first crushed with a part of the material that has been collected from the surroundings of the distributor, and then hits the material liner in the vortex branch cavity together. It is rebounded by the material lining, impacts diagonally upward on the top of the vortex cavity, and then changes its direction of movement, deflects downward movement, and the material emitted from the impeller flow channel forms a continuous material curtain. In this way, a piece of material is subjected to two or more chances of impact, friction, grinding and crushing in the vortex crushing chamber. The crushed material is discharged from the lower discharge port.