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Counterattack liner holds a very important role in the impact crusher, it is installed on the impact rack, in the crushing process of impact crusher, the impact liner of impact crusher plays the effect of repeated crushing on the stone materials, at the same time, plays a protective role in the impact crusher rack, so the counterattack liner wear of impact crusher is serious and the counterattack liner belongs to the vulnerable part of impact crusher that needs to be replaced frequently. If the costumers want to select a high-efficiency impact crusher, it is necessary to have a comprehensive understanding on the counterattack liner of impact crusher. In this paper, Hongxing Machinery will introduce the relevant knowledge of impact crusher's impact liner to clients.
When the counterattack plate of impact crusher is at work, it bears the impact of the material ejected from the plate hammer of impact crusher, and makes the material shattered by its impact force, then bounces the shattered material back to the impact zone for the impact crushing again. Until the material being crushed to the required size, the finished product cannot be discharged from the impact crushing machine.
Counterattack liner of impact crusher usually is manufactured with the high manganese steel, high chromium cast iron, alloy steel, rare-earth wear resistant steel, malleable cast iron and other wear-resistant materials, due to their enough impact resistance and toughness. The specific choice of which one can be based on the user's own requirements.
According to the shape of impact crusher liner plate, it can be divided into polygonal-shape counterattack plate and arc-shape counterattack plate. The structure of the polygonal-shape impact crusher liner plate is simple, which can make the material at each point of the counterattack plate be impacted in a similar vertical direction, so as to has the good crushing effect; The arc-shape counterattack liner can cause the material to form an intense impact crushing area in the center of the counterattack liner center after the material is bounced back from where the plate is, then the material crashes into each other to achieve the high crushing effect.
According to the moving direction of material, it can be divided into forward-type counterattack plate and backward-type counterattack plate. The rebound path of the forward-type counterattack plate is the saw tooth pattern, the material goes forward to the discharge port of impact crusher, the forward-type counterattack plate is mainly used to cursorily crushing the various fragile materials; The backward-type counterattack plate causes the material to return to the impact point after being crushed by the counterattack plate, which can increase the times of material being impacted and crushed to obtain the finer stone products.
Usually, we can use the split pin, the split nut and the bolt these three tools to fix the impact crusher liner plate, most of manufacturers use the bolt to fasten. One end of the counterattack liner is suspended on the impact crusher chassis and the other end is fixed by the adjustable bolts.
Ordinarily, there are two connection types: One adopts the common steel counterattack liner, and drilling the hole in the plate, then fastening the liner plate and the impact crusher chassis with the bolt. Another is that the counterattack liner adopts the wear-resisting material, then use the blind nuts to fasten the lining board with the chassis of impact crusher.
Due to impact crusher has different models, some have two crushing chambers, some have three crushing chambers. Because the crushing cavity type is different so the number of counterattack liner in impact crushing machine is also different, generally there are several crushing cavities in the impact crushing machine, and there are several counterattack liners in the cavity.
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