The crushing ratio of the machine is large, and the maximum crushing ratio can reach the discharging granularity and can be adjusted at will, which is not affected by the wear of the plate hammer and liner; There is no screen strip, which is not easy to block when crushing materials with high water content and large mud content; Adopting elastic adjustment mechanism, non-fragile articles can be automatically unloaded without damaging the equipment; The bearing is arranged horizontally, with long service life, and can crush materials with high temperature (such as cement clinker); The rotor body of the machine has a unique structure and hardly wears when crushing materials; The rear cavity is provided with a lead screw or a hydraulic opening mechanism, so that the wearing parts can be easily replaced without lifting the main equipment. Vertical impact crusher, also called sand making machine, is suitable for crushing and shaping soft or medium hard and extremely hard materials. Widely used in fine grinding and coarse grinding of various ores, cement, refractories, alumina clinker, emery, glass raw materials, machine-made building sand, building aggregate, artificial sand making and various metallurgical waste residues, especially suitable for silicon carbide, emery, sintered bauxite and fine sand. In the engineering field, it is an ideal production equipment for machine-made sand, cushion material, asphalt concrete and cement concrete aggregate. In the mining field, the sand mill is widely used in the pre-grinding process, which can produce a lot of fine ore and reduce the high-cost grinding load.