Ancient broken machinery is after the steam engine and the electric motor power machinery such as the gradual improvement and promotion have been created. 1806 emerged with a steam-driven roll crusher ; 1858 , American Blake invented rock crusher jaw crusher ; 1878 U.S. development with continuous crushing action of the gyratory crusher , the production efficiency is higher than for intermittent broken action jaw crusher ; 1895 , American William invention low energy impact crusher .
Americans EW Blake (Black) designed and manufactured the world's first jaw crusher . The structure in the form of elbows plate ( simple oscillating type ) jaw crusher . As the jaw crusher has a simple structure , easy to manufacture , reliable, easy maintenance, smaller size and height advantage . Still is widely used in crushing hard , medium hard , soft ore and a variety of materials , such as various minerals , solvents , slag, building stone , marble and so on.
Commonly used jaw crusher crusher 4 to 6 , and small jaw crusher can sometimes reach 10 . Large, medium-sized crusher feeding intensity up to 1000 ~ 2000mm, its particle size of up to 20 ~ 250mm, The new small crusher and crushing with jaw crusher resulting product can be some of the finer . Jaw crusher for primary crushing operations can also be used for medium and fine job. In particular, are used to mine and crushing operations , the small mobile crushing plant .
Jaw crusher works is by means of movable jaw periodically oscillating movement toward or away from the fixed jaw plate , so that the material into the crushing chamber being squeezed , splitting , bending and impact action and broken. Material crushed by the weight or jaw thrust downward swing discharged from the discharge port . Follow the trajectory of his jaw , structure, moving jaw hanging and moving jaw toggle plate support different ways , jaw crusher is squeezing and bending two jaw plates for use of materials, rough broken or broken in various hardness of materials broken machinery . His broken body from the fixed jaw plate and movable jaw plates, jaw plate close to the time when the two materials Jibei broken when the two left jaw plate nesting population is less than a block from the bottom of the material . Its crushing action is carried out intermittently . This crusher due to simple structure, reliable and able to crush hard materials , etc. are widely used in mineral processing , building materials , silicate and ceramic industries.
To twenty- 1980s , crushing 800 tons of material per hour, a large jaw crusher feed size has reached about 1800 mm . Commonly used jaw crusher has two elbows plates and single brackets . The former moving jaw at work only for simple swing arc , so called simple swing jaw crusher ; swing arc , while the latter is still up and down movement , so called complex swing jaw crusher .
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