How to choose good backing plate for truck brake pads
In the car brake system, brake pad is the most critical safety parts, brake pad plays a decisive role in all brake effect, so good brake pad is the guardian of people and cars.
Brake pads are generally composed of steel plate, adhesive insulation layer and friction block. Steel plate shall be coated to prevent rust. Smt-4 furnace temperature tracker is used to detect the temperature distribution of coating process to ensure quality.The heat insulation layer is composed of non-heat transfer materials, the purpose of heat insulation. Friction block is composed of friction material and adhesive.When the brake is pressed against the brake disc or brake drum, friction is generated, thus to achieve the purpose of brake deceleration.As a result of friction, friction blocks will gradually wear out, generally speaking, the lower the cost of brake pads wear faster.
The backing plate is one part of the brake pad, which is mainly used to fix friction material, It is easy to install on the brake system. At present, almost all brake pads on the market have a high strength friction materials are sintered in a backing plate. In the brake oil cylinder block under the promotion of free movement on the calipers, because that piece of steel plate at the back of the friction plate, so everyone called backing plate. The backing plate is generally designed with rivets and holes which is easy to install on the calipers.
The backing plate has a feature: backing plate materials are usually thicker, and the production process is more complex. In recent years, In recent years, people pay more and more attention to car safety, The brake system of each truck factory must go through more rigorous road test and repeated demonstration before it can be formally applied to each truck, Considering the brake system, in addition to the quality of the friction block, the most important is the friction block behind the backing plate, Therefore, the quality of steel back directly bears the safety of cars and drivers, and is directly related to the quality, reputation and sales of cars.
There are three kinds of backing plates: stamping (hole) backing plate, welded mesh backing plate and casting iron backing plate. The following details are their respective characteristics.
1. Stamping (hole) backing plate is drilling or punching holes in the steel plate. The advantages of it are: strong bonding and shear force, as well as the cheap price; disadvantages: when it is processed into brake pads, the appearance will be a little rough, at the same time, drilling or punching holes will weak the strength of the steel plate, make it bending under the pressure. This bending, along with the formation of rust, can cause friction material to crack and separate from the base plate.
2. Welded mesh backing plate is tiled with steel mesh on the surface of the steel back body, which is fixed on the surface of the steel back body by spot welding. Its structure and technology are simple, heat dissipation effect is good, and can improve the resistance to shear force of friction plate in steel back surface. What’s more, when processed into brake pads, its appearance is more beautiful. But the unit price is slightly higher than stamping (hole) backing plate, and some products will be easy to break away from friction plates.
3． Casting iron backing plate is produced through molding, combination, casting, grinding, sandblasting and other processes. Its advantages are good adhesion, strong shear force, high heat dissipation and not easy to deform and break off. For many manufacturers, there are few types for casting iron backing plates, and its process is complex, rejection rate is also high, so the price is higher than others.
Padstar Auto parts Co Ltd has focused on production of casting iron backing plates for more than 18 years. We are China's first manufacturer of casting iron backing plate. With modern production technology, complete system of manufacturing and high speed of the development for new type products, Padstar now has more than 10 patents and more than 30 kinds of product models. 18 years’ experience and mature technology also makes our rejection rate extremely low. We could guarantee the high quality of products and provide very competitive price at the same time. So casting iron backing plates from Padstar are very popular among the brake pads manufacturers both at home and abroad.
