Classification of Jaw Plates
Jaw Plates are one of the most important parts of jaw crusher. It is between two plates (fixed and swing) that the crushing takes place. Since it's the part that takes most of the beating, it's the one that needs most frequent replacement.
If you are in an industry that uses them, then you no doubt understand the important nature of jaw crushers, and of the jaw plates that are used with them. It's very important that an eye be kept on the plates to ensure that they last for the longest amount of time possible. So what can you do to make sure that you have the right plate for the right job? Well there are many, and the choice as to which one to use is totally up to you. Here's some of the type of jaw plates with their advantages and disadvantages.
This type of jaw plate has a lot of advantages, but overall they just don't last very long especially with smaller CSS (Closed Side Setting) settings. You'll find out that they wear out in just a short time. This is due to its poor wear distribution. They may even plug up frequently. But, they have the maximum feed opening, most effective nip angle, and the greatest reduction ratios. These crusher liners will suit your needs if you are running a small operation, but won't cut it if you have a full blow production facility going on.
These jaw plates essentially are straight with a curved end. When it comes to wear distribution, they are better than the straight dies but have poor reduction ratios than the later. They have fewer issues of plugging but a disadvantage of smaller feed opening than the straight ones. These plates prove very useful when the feed material has a significant quantity of fines, that the bottom of the liner would wear off rapidly.
This particular jaw plate is exactly the way it sounds, being a fully curved variant. Owing to the best wear distribution of all the three types of crusher liners, these liners will last the longest. They don't plug quite as bad, provide a decent looking product, and are capable of being used with smaller CSS settings without sustaining much wear on the ends of the die. However, due to its shape, jaw crusher loses the effective nip angle in the upper portion of the crushing box. As they reduce the feed opening, these jaw dies are particularly used when the crusher is larger than required for the feed size being fed. With these plates, the largest feed size won't exceed the gap between the jaw dies just above the center of the dies in the horizontal direction.
This type of jaw plate has a flat surface which exerts an even and flat pressure on the material being crushed. If you use a flat liner, you may discover that within a pulverizing material the pressure becomes even and flat, giving the rock absolutely nowhere to go. A flat liner has no way of gripping a rock, which is the area in which a corrugated die excels.
Unlike Flat Liners, theses jaw plates have a corrugated surface. It is a common sense that the ridges in a corrugated die will be able to produce a more concentrated force which enables to break rock with less effort, meaning that power requirements are extremely low. With lower power requirements, the crusher has less load to contend with. But these corrugated dies don't come without their own issues. They can be easily plugged and the feed opening can be reduced. This piece of equipment is robust but isn't something that you can take for granted. You need to take care of it, keep an eye on it, and make sure that both you and your employees are using it as intended.