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  • Diana Diana
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Have You Chosen the Right Impact Rock Crusher?

 Reveal the mysterious veil of impact rock crusher equipment!

Impact rock crusherIn comparison to the jaw crusher, impact rock crusher is used as the secondary crusher. It can crush all kinds of coarse, medium,  fine, and brittle materials.

Hongxing crushing machinery has impact rock crushers, jaw crushers, cone crushers, and hammer crushers. These are the common crushing machines used for breaking slag, coal, quartz, gold ore, etc. They are also favored by many customers due to their simple structure, low cost and price, and good grain size. But do you really understand the impact rock crusher? Come on and try the following questions!

Why does impact rock crusher machine have no flywheels?

We know that jaw rock crusher has flywheels and sheaves, so what is the function of the flywheel? The main effect of it is to balance the weight of the sheave, followed by the function of energy storage.

Compared with the jaw crusher, the transmission part (spindle, sheave) of the impact rock crusher is installed at a relatively lower position, which has a good stabilization effect on the body.

Secondly, the rotor of the impact crusher is very heavy, much larger than the weight of the flywheel, thus the transmission of the single flywheel has little effect on the smoothness of the crushing machine.

Most importantly, the impact rock crusher has no idle travel and does not require flywheel. So the impact rock crusher does not need to install the flywheel.

Why do some impact rock crushers have chain screens, but some don’t have?

Generally speaking, the three-chamber impact rock crushers do not have a chain curtain, and only European version one with the large two-chamber feeding port has a chain curtain, because this kind of European version impact rock crushers have the big feeding inlet port, and the two counter plates are relatively up, almost are parallel to the feeding inlet ports. While the chain curtain can prevent the stone from being bombed. Therefore, the type of impact rock crusher can be configured with a chain curtain.

The common impact rock crusher is generally equipped with four hammers, so in order to improve production efficiency, why not add two hammers?

In fact, the Hongxing manufacturer mainly considers three factors in design: discharge granularity; production; cost (Hongxing manufacturer’s production cost and customer’s replacement cost of maintenance).

We know that after the material enters the impact rock crusher, the material is repeatedly crushed between the hammer and the counter-attack plate, so the wear of these two components is more serious. If the number of hammers is large, the production costs will increase for Hongxing crushing manufacturers and customers. On the other hand, as the number increases, the rate of crushing between the hammer and the counter plate increases, resulting in a finer discharging size and a lower yield. In order to maintain the balance of overall production, the number of hammers is not as much as possible.

In conclusion, flywheels, chain screen, and hammer are all essential for impact crusher settings. They are all for sale throughout mining companies. Welcome to the mining industry undertaking engineering project for consultation and buy your desirable stone impact crushers.

How does the impact rock crusher adjust the granularity?

This is the problem raised by our editor. Actually, ordinary impact rock crusher(such as the common PE series ) is generally adjusted by hand. European impact rock crusher is adjusted by hydraulic in order to enlarge or diminish the gap between the first and second crushing and armature.

However, the adjustment steps for European impact rock crusher of the third-level are as follows (this is to adjust the small pitch, if the adjustment is large, please reverse the operation): first, loosen the fixing screw which used as to adjust the gasket, then the hydraulic cylinder moves to push the spring inside so that the distance between the impactor and the rotor becomes smaller. Next, the outer gasket is fitted inside, and then the hydraulic cylinder is released until the limit plate catches the gasket inside.

What are the consumables of the impact rock crusher?  How long is their service life?

The impact crusher wear parts are mostly board hammer, counter board, side lining board and so on. The service life is about 1 month (even a week), 2 months, 3 months respectively. The specific service life shall be subject to the actual situation. Generally, when we install wearing parts, the configuration ratio of the three parts is 3:2:1.

Some impact rock crusher plates use the straight-plate (rectangle) plate hammers, while some adopt the crescent-shaped (circular arc) plate hammers. Which is better?

Generally speaking, the straight plate hammer of impact rock crusher is an old-fashioned plate hammer shape, which is used for ordinary impact rock crusher, using the briquetting fixing method; the crescent shape is mostly used for the stone impact rock crusher of the European version, and the wedge fixing method is adopted, and the crushing contact area can be larger.

What are the fixing methods of the hammer of impact rock crusher? What are the advantages and disadvantages of these stone crushers?

There are three common types: screw fixing, plate fixing, and wedge fixing.

Screw fixing: The screw is exposed on the striking surface, it is easily damaged, and the screw is subjected to large shearing force. Once it is cut, it will cause a serious accident.

Press plate fixing: The plate hammer is inserted into the groove of the rotor from the side face, and the two ends are pressed by the pressure plate. However, this fixing method makes the hammer difficult to be firm, and the hammer is easy to loose during work. (There is no need to be welded, the pressure plate is easy to wear and it is not easy to replace)

Wedge fixing: the method of fixing the hammer of impact rock crusher to the rotor by using wedges. Under the action of the centrifugal force, this fixing method can ensure the faster speed of the rotor, the firmer the hammer is fixed, the work will be reliable, and the replacement is more convenient. This is the best way to fix the hammer of impact rock crusher.

What is the difference between a fold-type impact rock crusher and circular arc one? And which is the better one?

There are two common types of impact crusher: a fold-type and circular-arc impact rock crushers. The structure of the former is simple but cannot ensure the effective crushing of ore. While as for the latter, the outstanding character is that materials can be reduced in the vertical form at any point of the stone impact plate, which greatly enhances the crushing efficiency.

Both of them are secondary crushing machinery but when should we use impact rock crusher or cone crusher machine?

First of all, they are applied to different materials. The impact rock crusher is suit for medium hardness materials like limestone. Cone crushing can crush some hard materials such as granite, basalt, pebbles, etc.

Cone crusher

Cone Crusher, manufactured by China Hongxing Machinery(Also called HXJQ Machine), mainly divided into four types mainly. It is of great high quality, best performance, and friendly environment.

Secondly, the final sized material is good and the finished corners are less, and the powder is more. The finished product of cone crusher has more needle-shaped pieces and the grain shape is not good, which is why some sand-making production lines use impact rock crusher.

Then, compared with the impact crusher, the cone crusher has the characteristics of low energy consumption, large output, stable production, etc., So the cone is often used for large-scale and high-yield production line operations.

The impact rock crusher has the advantages of simple structure, large crushing ratio, whose high crushing effect also attracts many customers.

Finally, the price of the cone crusher is more expensive than the impact crusher. But the longevity of the wear part is longer, which avoiding the trouble of frequently replacing parts. In the long run, the cone is more expensive than the impact crusher. It can be understood that the pre-recovery cost of the impact rock crusher is low while the post-maintenance cost is high. The pre-cone cost of the cone crusher is high but the input cost is low later.