Jaw Crusher

CRUSHER – JAW CRUSHER

A jaw crusher or toggle crusher uses compressive force for breaking of particle. This mechanical pressure is achieved by the two jaws of the crusher of which one is kept stationary and is called fixed jaw while the other reciprocates which is called swing jaw. Swing jaw moves back and forth relative to it, by a cam or pitman mechanism, acting like a class II lever or a nutcracker. The volume or cavity between the two jaws is called the crushing chamber.

Jaw crushers are heavy duty machines and hence need to be strongly constructed. The outer frame is generally made of cast iron or steel. The jaws themselves are usually constructed from cast steel. They are fitted with replaceable liners which are made of manganese steel, or Ni-hard (a Ni-Cr alloyed cast iron).

Jaw crushers are classified on the basis of the position of the pivoting of the swing jaw

1. Blake crusher-the swing jaw is fixed at the upper position

2. Dodge crusher-the swing jaw is fixed at the lower position

3. Universal crusher-the swing jaw is fixed at an intermediate position

How does its work ?

The working principle of jaw crusher is very simple. The whole crushing process rely on the relative motion of the two jaw plates. One of the jaw plates stay still while the other move against it. And with the movement, the materials between the two plates would be crushed into small elements. While the plates move against each other, the materials would be crushed and while plates move away from each other, the broken materials which are smaller enough would drop through the discharging opening. And due to the simple structure, jaw crusher is easy to maintain and repair. These features promote its popularity to a great extant.

Application of this jaw crusher

1. Jaw crusher is used in sand making line.

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