Jaw crusher has been put into use since 1958 and becomes one of the crushing equipment with a long developing history; the equipment is still widely used in building industry, chemical and mining industry. Due to the advantages of simple structure, reliable and stable performance, and easy to maintain, it becomes one of the most important equipment in the crushing equipment. According to the motion characteristics, the jaw crusher is divided into two types: simple swing jaw crusher and complex swing jaw crusher. The main difference between complex swing jaw crusher and simple swing jaw crusher is the crushing way. Simple swing jaw crusher has a simpler structure frame-building and the movement locus of the movable jaw is more complex than the simple type, it can move both in the horizontal and vertical directions. In the crushing process, it is mostly used in course crushing and intermediate crushing stage. This type of device also has the following shortages: small broken ratio, large energy consumption, low productivity, and the crushing process is easy interrupted. Affected by the production process, the jaw plant is vulnerable to lose its inherent functionality and should be changed frequently. In view of these shortcomings, the expert improves the equipment through improving the crushing chamber, optimizing the overall structure of the equipment, adopting the automatic control system for this equipment and introducing new wear-resistant material in the liner.
At present, the SBM researchers introduce a new type of jaw crusher-sieve jaw crusher. The device adds a screening system to the traditional crushing system, which greatly simplifies the process of crushing process and reduces the jam and over grinding phenomenon of the crusher and greatly improves the production efficiency; In addition, there is a dual chamber jaw crusher. Its work principle is similar to the cone crusher. Relative to the other jaw broken, this kind of crushing equipment has the advantages of greater processing capacity and production efficiency and easy maintenance.