Jaw Crusher may have material return phenomenon when working: the material is not squeezed by the movable jaw and the fixed jaw, but is squeezed out of the inlet. This situation will not only reduce production efficiency, but may also cause physical harm to humans. Today, the editor of the Central Plains mainly shares the reasons and solutions for Jaw Crusher’s return of materials.

1. Reasons for Jaw Crusher’s return of materials

① Jaw Crusher’s own problems

The new Jaw Crusher parts do not match the dimensions of the drawings, such as the length and thickness of the jaw plate, the length of the bracket, the angle of the bracket, the size of the inner cavity of the frame, and other irregularities resulting in inferior products; the angle between the two jaws after long-term use The friction angle greater than twice prevents the material and the jaw plate from generating enough friction to overcome the upward component force of the crushing force, and the material is squeezed out under the action of the vertical upward force and slides towards the direction of the feed inlet .

Jaw crusher

②The material is unbalanced

The vertical force of the material to be crushed in the crushing cavity is easily unbalanced, and the phenomenon of material return is likely to occur under the action of the upward component of force.

③The width of the discharge opening is too large

For the Jaw Crusher of the same specification, the larger the width of the discharge opening, the more likely it is to return to the material. During the crushing process, the material is in direct contact with the jaw plate, causing friction. When the jaw plate wears more severely, the possibility of material return phenomenon is greater.

④The size of the material to be broken is too different

When the size of the material to be broken by the crusher varies greatly, the phenomenon of material return is easy to occur.

2. The solution of Jaw Crusher returning materials

①According to the material situation, use a crusher of appropriate specifications.

②When the jaw plate is worn out, the phenomenon of material return occurs, and the jaw plate should be repaired or replaced in time.

③When the particle size of the material is too different, screen it first; coarse Jaw Crusher is used for pre-processing, and then fine Jaw Crusher is used for finishing, which can ensure the processing requirements of the material.

④Add a wedge-shaped backing plate to the joint surface of the movable jaw and the movable jaw to reduce the angle between the two jaws, so that the angle between the two jaws is less than twice the friction angle, and the phenomenon of material return is eliminated.

⑤A protective plate can be welded above the Jaw Crusher inlet to prevent the material from flying out of the inlet and endangering the personal safety of the operator.

After the Jaw Crusher returns to the material, the operator must pay attention to safety, and follow the corresponding method to deal with it to make the equipment normal use. Luoyang Zhongyuan Mining Machine Manufacture Co., Ltd. specializes in the production and sales of Jaw Crusher, which can be professionally customized according to customer needs. Interested parties are welcome to come to consult.