The most representative of high-performance friction liners in China is the imported k25 friction liner used on mine hoists. The friction liner is mainly based on the friction coefficient, hardness, pressure resistance and heat resistance compared with ordinary friction liners. There is a big difference between the wear resistance and the stability, and these factors are the key to the normal operation of the mine hoist. Nowadays, large-scale mine hoists in China use high-performance k25 friction liners. Plastic lining quality identification method Plastic lining is a plastic product, plastic lining quality identification method is the plastic quality identification method. It is true that the quality of plastics is very difficult to identify, and there is no systematic method of identification. There are several ways to:
1, destructive experiment method:
High-performance friction pad
Our simplest method is to throw the plastic lining over the head and throw it on the ground. If it falls off, it is definitely not a good thing. Normally a plastic lining has one or two stocks.
2, appearance inspection method:
a, whether the appearance of deformation. The plastic lining with large appearance and deformation is generally not very good in quality, which means that in order to add the masterbatch to increase the amount of the material, the plastic lining may also continue, but it is not very durable.
b, plastic lining appearance brightness. The outer surface of the plastic lining should be smooth and smooth like a matte surface, but not as bright as a mirror. Too bright indicates that the plasticizing temperature of the raw material is relatively low or the temperature is too high when heated, so that the plastic does not have toughness. Of course, too rough a surface is not enough.
c, watch the two ends of the plastic lining. The two ends of the plastic lining are sawing surfaces, and there are no air holes at the two ends. The air holes are certainly very bad products.
d, unless it is a special case, plastic lining is a mold once formed, after the re-treatment plastic lining general manufacturers in order to cover up the deformation is too large to deal with, one can imagine the quality of plastic lining will not be too good.
3, fire drawing method:
Cut off a small piece, use less fire to form a gel, pull apart, the longer the pulled out wire, the better the quality of the plastic lining.
High-performance friction liners are the most rational products to replace the old polyurethane friction pads, and they are formulated with high-strength heat-resistant resins, carrier resins and other chemical substances in proportion. High-performance friction linings have significant improvements in friction coefficient, strength, high temperature resistance, pressure resistance, wear resistance and service life, and are mainly suitable for replacing conventional liners. Usually the coefficient of friction is greater than 0.25. At the same time, the high mechanical strength does not contain the material that damages the steel wire rope, which greatly improves the performance of the lifting device and plays a very important role in the upgrading and upgrading of the mine.
