Asbestos-free micro-metal polycrystalline fiber automotive drum brake linings

Abstract

The invention discloses an asbestos-free micro-metal polycrystalline-fiber drum brake lining for an automobile. The drum brake lining comprises the components as follows: 10-15% of cashew nut shell oil modified phenolic resin, 3-6% of powdered nitrile butadiene rubber, 5-8% of polycrystalline mullite fibers, 10-20% of wood fibers, 2-8% of polyacrylonitrile fibers, 2-10% of cashew nut shell oil friction powder, 5-15% of barite powder, 3-18% of graphite, 1-10% of zircon powder and 16-23% of other filler. A production technology comprises the steps as follows: mixing the components by an automatic mixer, weighing required amounts of finally formed materials according to specifications required by the drum brake lining, performing cold press molding on the materials to form a cold blank, performing hot press molding, heat treatment, grinding and drilling steps, and obtaining a finished product through machining. The formula product has the main characteristics that the drum brake lining is stable in friction coefficient, low in hardness, sensitive in brake, comfortable, free of noises, safe to use, stable, environment-friendly and capable of meeting the environmental protection requirement and meeting various performance requirements required during automobile brake.

Description

technical field [0001] The invention belongs to the technical field of automobile brake systems, and in particular relates to a production formula of drum brake linings for automobiles. Background technique [0002] Brake pads are one of the essential parts of automobiles and other motor vehicles. They are a kind of composite material, which mainly consists of three parts: binder, reinforcing material and filler. The reinforcing material used before the 1990s was mainly asbestos, which would cause environmental pollution and endanger human health. With the rapid development of the automobile industry, the procurement of auto parts has also become a global development trend. The amount of brake linings is increasing year by year, and higher requirements are placed on its performance. In order to be in line with the international market, the domestic automobile friction material industry has been researching and developing non-asbestos products, among which many other fibers ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a production formula and production process of asbestos-free micrometallic polycrystalline fiber automotive drum brake linings, which not only solves the problems of environmental pollution and human health hazards caused by the use of asbestos, but also avoids the use of high Strength fibers lead to excessive hardness of the product, damage to the counterpart and other disadvantages

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