As one of the most common mining equipment, stone jaw crusher appears earlier than other crushing machines. Jaw crushers (also called jaw breakers) are typically used as primary crushers, or the first step in the process of reducing rock, and are one of the main types of primary crushers in a mine or ore processing plant.
Double toggle jaw crushers are preferred for crushing ususually hard, abrasive rocks and other materials like ferroalloys and glass. They differ substantially from other types of crushers. There is no rotary motion in the crushing cycle and all crushing is done by compression of the feed material between two massive jaws plates. The moving jaw compresses the material against the stationary jaw. Jaw plates can be either smooth or corrugated.
This type of China jaw crusher has the characteristics of large crushing ratio, uniform particles, simple structure, reliable working, easy repair, low price, etc, which has been widely used in mining, smelting, materials building, road, water conservancy, chemistry and other industries.
Double toggle jaw crushers have one jaw fixed, while the other pivots about a top hinge. This moving jaw is shaped to move firmly and squarely against the material. There is no rubbing or grinding. Only compression, which produces a generally cubical product with minimum fines. The moving jaw is very well balanced, so 95% of the drive motor power is ued for crushing. While only 5% of the power is needed to move the jaw itself. As a result of this high mechanical efficiency, double toggle jaw crushers require smaller size motors, keeping power costs down. Behind the stationary jaw are shims, used to adjust the distance between the lower ends of the jaws (closed side setting). The setting determines the output product size. There is also an arrangement of safety arm for protection from us-crushables accidental overloads.
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