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Friction particles for friction material, preparation method and high porosity lightweight drum brake pad prepared therefrom

A technology of high porosity and brake pads, applied in the direction of friction linings, other chemical processes, chemical instruments and methods, etc., can solve the problems of unfavorable development of automobile lightweight, heavy weight of brake pads, high density of brake pads, etc., to achieve Significant weight reduction effect, improved life, and increased porosity

Active Publication Date: 2020-12-08
海盐欧亚特汽配有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As one of the auto parts, the development of lightweight brake pads is also an inevitable trend. Now the general brake pads on the market have a high density (≥2.1 ​​g / cm 3 ), low porosity (less than 10%)
This causes the weight of the brake pads to be relatively large, which is not conducive to the development of lightweight vehicles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of friction particles for friction materials, which is made by modifying the raw materials with rubber internal mixer, soaking and granulating, and the steps are as follows:

[0044] 1. Prepare raw materials: 4 kg of nitrile latex, 6 kg of 1220 resin, 6 kg of graphite, 2 kg of secondary high-temperature adhesive, 4 kg of calcium carbonate whiskers, and 50 kg of filler. The composition of 50kg filler is: barium sulfate 20kg, rubber powder 4kg, magnesium hydroxide 4kg, reinforcing fiber 15kg, grinding powder 7kg. The grinding dust is the dust generated during the grinding process of producing brake pads.

[0045] 2. Add graphite, secondary high-temperature adhesive in sequence in the internal mixer, then add fillers, and finally add nitrile latex and 1220 resin, and refine 15- For 20 minutes, allow the nitrile latex to fully combine with the resin, and finally discharge to form loose granules, add calcium sulfate whiskers to the granules before discharging, and ob...

Embodiment 2

[0048] A lightweight drum brake pad with high porosity, the brake pad is made by the following method:

[0049] a. Mixing process, mixing each raw material in proportion, the mixing time is 900 seconds, and the mixing temperature is controlled below 50°C;

[0050] Raw material ratio: phenolic resin 13kg, barium sulfate 5kg, friction powder 7kg, magnesium hydroxide 4kg, 6~40 mesh granular graphite 5kg, 10~20 mesh granular flexible coke powder 10kg, reinforcing fiber 15kg, wood fiber 2kg, sulfuric acid 8kg of calcium whiskers, 2kg of foamed alumina, 30kg of friction grains (made in Example 1), 3kg of foamed iron powder, and 5kg of glass fibers.

[0051] The mixing procedure adopts a 3-step mixing method, and uses a plow-rake type mixer for mixing. Four flying knives are arranged in the plow-rake type mixer. The 3-step mixing method comprises the following steps:

[0052] ①The speed of the flying knife is under the condition of 2980±10 rpm, add phenolic resin, barium sulfate, fr...

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PUM

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Abstract

The invention relates to a brake pad, in particular to a friction particle used for a friction material, a preparing method of the friction particle used for the friction material and a high-porositylow-weight drum type brake pad prepared through the friction material. The friction particle used for the friction material is composed of the following raw materials including, by weight, 4-8 parts of acrylonitrile-butadiene rubber latex, 3-6 parts of 1220 resin, 6-10 parts of graphite, 2-4 parts of a secondary high-temperature adhesive, 4-8 parts of calcium sulfate whiskers and 50 parts of padding. Raw materials low in price are commonly adopted, and the raw materials are put into the formula so as to reduce the cost. The physical properties of all the materials of the brake pad are sufficiently utilized, the porosity of the product is increased, the specific gravity of the product is reduced, it is ensured that the performance of the brake pad is stable, braking noise can also be reduced, the braking comfort is improved, the brake pad also conforms to the lightweight development trend, and the production cost can also be reduced.

Description

technical field [0001] The invention relates to a brake pad, in particular to a friction particle used for a friction material, a preparation method thereof and a high-porosity lightweight drum brake pad prepared therefrom, belonging to the technical field of auto parts. Background technique [0002] According to the development trend of automobile lightweight, foreign traditional automobile giants lead, and my country is speeding up to catch up. As one of the auto parts, the development of lightweight brake pads is also an inevitable trend. Now the general brake pads on the market have a high density (≥2.1 ​​g / cm 3 ), low porosity (less than 10%). This causes the weight of the brake pad to be relatively large, which is not conducive to the development of lightweight automobiles. The current research and development direction is to reduce the generation of braking noise and increase the comfort of vehicle braking. Contents of the invention [0003] The object of the pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D69/02C09K3/14
CPCC09K3/149F16D69/02F16D2200/0008F16D2200/0052F16D2200/0056F16D2200/006F16D2200/0086
Inventor 马建平
Owner 海盐欧亚特汽配有限公司
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