The counter-roller crusher pulls the material on the roller surface into the crushing cavity, so that the material is crushed by the stress mainly caused by squeezing, and is taken out of the crushing cavity by the rotating roller and discharged as the crushed product.

According to the surface of rolls, it can be divided into smooth roll crusher and toothed roll crusher. (The following roll crusher refers to “smooth roll crusher”.)

The main working parts of the roller crusher is the cylindrical rollers. The rollers are supported by the fixed and movable bearings, and they are relatively rotating which are driven by the motor. The materials are crushed by the friction of the rotating rollers, and the finished products are discharged from the gap of the rollers.

The spring is used to balance the pressure generated between the rolls. If there are non-crushed materials falling between the two rollers, the compression spring of bearings can be pushed to make a large gap so that non-crushed materials can be discharged immediately.

After the non-crushed materials are discharged, the spring can help recover the gap between the rollers to the original condition and the roll crusher continues to work.