Comminution in the jaw crusher takes place in a wedge-shaped crushing chamber between a fixed and flexible crushing jaw. In the upper suspension, the flexible crushing jaw is driven via an eccentric shaft and supported underneath by an infinitely lockable eccentric shaft. This special geometry enables the crushing jaw to execute an elliptically rotary movement, both in the upper suspension, as well as at the discharge opening. As an upshot of this sequence of movements, the crushing chamber is reduced in size with each rotation, which leads to material comminution, but enlarged as well, so that the material is loosened up and can slide down.
The crushing chamber’s wedge shape and the lift specified by the eccentric shaft facilitate the material sliding deeper down into the crushing chamber with each rotation until it can be crushed to conform to the opening set.
At the same time, the set-up of the flexible crushing jaw makes a high throughput rate and high attainable fineness of the finished product possible, while this set-up – apart from the design – is dependent on the size of the discharge opening set on the crusher and the size reduction behaviour of the crushed material.