The possible reasons of mobile jaw rupturing.

1. There are denseness air holes when the jaw casting.
2. Incompetent toggle plates and pads were used. When crusher was crushing in high strength,the toggle plate did not break.
3. Displacement of mobile jaw occurred, one end collides with edge protection board of the frame.
4. Rod spring was not changed promptly when it lost its tensile force.
5. Discharging opening is smaller than the prescribed limit.
6. Feeding opening is not in the right site,either the opening favors one side or the angle of hopper is too steep,as a result of material heating jaw head directly.

Debaring methods of movable jaw rupture.

1. Change the movable jaw.
2. Change movable jaw and the original toggle plate and toggle plate pad.
3. Change movable jaw,correctly install the eccentric axle,bearing,bush and mobile jaw,change wearing parts as well.
4. Change movable jaw and rod spring.
5. Change movable jaw,adjust the discharging opening as well.
6. Change movable jaw,equip the feeding hopper as well to ensure laying-off evenly and steady,and divide into two sides from the midst.

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How to choose crushers mainly depends on size of materials and required discharging size. Cone crusher and impact crusher are both for fine crushing. How to choose and decide is according to actual production. If you would like to learn more other details, please directly call us and seek advice from our technicist.

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Generally speaking, factors affecting jaw crushers are nip angle and number of rotation.

Nip angle refers to the angle between mobile jaw and fixed jaw. According to calculation, the maximum size should be 320 , while real angle is smaller than 250 , generally rangs from 18 to 20. With over-big nip angle, ores in cavities may be squeezed up out and there might be damange to people or other equipments. With increase of nip angle(high crushing ratio), capacity will drop a lot. Thus, while grain size can be guaranteed, it’s reasonable to enlarge the discharge opening. Size of discharge openings can be adjusted via adjusting block, and people should pay attention to corelationship between crushing ration and productivity while adjusting size of discharge.

Within a certain scale, productivity of crushers can be enhanced by increasing rotaions of eccentric drafts. However, power cost for each unit weight will increase at the same time. With over-big rotation speed, crushed ores can not be discharged in time and there will be problems of product jams and cause low productivity finally, higher power consumption. Therefore, a proper rotaion speed should be set to jaw crushers.

Eccentric drafts, connecting rods, mobile jaw, draft and back plate are major wearable parts and should be lubricated and changed frequently.

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