The vertical shaft impact crusher, also called sand making machine and rubble shaping machine, is a kind of crusher impacted by the materials themselves. It is of high energy but low consumption and of international advanced level developed by introducing foreign outstanding technology of the same type of products. At present, it is the most advanced and practical equipment for medium-sized and fine crushing and shaping.

Application:
PCL sand making machine is widely used for medium and fine crushing (sand making) for various hard and brittle materials such as rocks, grinding materials, refractory materials, cement clinker, quartz, iron ore and concrete aggregate, etc. It is especially appropriate for sandstone for architecture and road construction.
Features:
1. It features of simple structure, high crushing efficiency and low production cost.
2. It can fine crush and crude grind materials, and the crushed products are of cubic shape.
3. The influence from the water in materials to the machine is little.
4. It is suitable for crushing materials of medium, high and super hardness.
5. It works by stones hitting stones, so there is little wear for the machine and it can save energy and is of low consumption.
6. The grade and the fineness of the sand for construction after being washed can be up to the national standards, such as “sand for construction” and “cobble and broken stones for construction”.
7. It features of fine stabilization, low noise. And because it crushes materials in the cavity, the dust pollution is little.
8. when used along with the rod mill and ball one, it can simplify the flowing process, lessen the energy consumption, improve the production efficiency and cut down the cost to a large degree.
Working principle of PCL sand making machine:
load through boot into the vertical shaft impact crusher. The materials are divided into two parts by the distributor. One enters rapidly rotating impeller through middle of the distributor. Then the impeller speeds up immediately with acceleration hundreds of times higher than acceleration of gravity. The materials are thrown out through 3 evenly distributed flow passages from the impeller at a speed of 60-70m/s to be crushed together with the part of materials left around the distributor, and then impacted to the material lining in vortex cavity branch. After rebound by the lining, the materials are impacted transversely upward to top of the vortex cavity, and then move downward. Materials transmitted from flow passages of impeller form a continuous material curtain.
A piece of material undergoes random impact, friction and grinding for at least twice in the vortex crushing cavity. The crushed materials are discharged through discharge slot on the lower part. The equipment forms closed circuit with circulative screening system. Generally, the materials will become less than 20 meshes after circulation for 3 times. During the whole crushing process, the materials impact and crush with each other. Not contacting directly with metallic components, the materials are crushed by impact and friction with the lining, so as to reduce corner pollution and extend the time of mechanical wear. Dust pollution is eliminated by ingenious self-circulating air in the vortex cavity.
Technical Data :