The existing sand making has more coarse particles, high powder content, rough surface and multiple edges and corners. Aowei Machinery conducts special research on the problems in sand making process. Taking pebble as an example, pebble with its high hardness and high silicon content, requires high quality crushing equipment. In order to avoid the wear and tear of crushing equipment parts in crushing materials with high hardness, our company adopts a multi-stage crushing scheme--- jaw crusher-cone crusher-sand making machine, triple sand making to improve equipment service life, ensure high output and quality of finished products. The finished products can be widely used in many fields, such as highways, railway, hydropower dam, airport construction and concrete mixing plants.