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Manufacturing method of flame-retardant, anti-static and asbestos-free brake shoe

A flame-retardant, anti-static, asbestos-free technology, applied in brake parts, mechanical equipment, friction linings, etc., can solve the problems of thermal degradation of friction performance, unstable friction coefficient of asbestos brake shoes, and increased wear, etc. Stable, good promotion significance, low wear effect

Active Publication Date: 2014-07-09
中实洛阳机械工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, asbestos brake shoes also have disadvantages that are difficult to overcome: first, asbestos has poor thermal conductivity, and the frictional heat is difficult to disappear quickly, resulting in the thickening of the thermal decay layer of the resin, which intensifies the wear and tear, and asbestos fibers can cause cancer in the human body
Secondly, the friction coefficient of asbestos brake shoes is not high, and the friction performance is prone to thermal degradation, resulting in unstable friction coefficient of asbestos brake shoes
At the same time, asbestos brake shoes use high-hardness friction agent and steel wool, which will cause sparks and corrosion of the brake shoes, and cause severe wear and tear on the brake disc, and produce howling when braking.
Now many companies are developing asbestos-free brake shoes to replace the previous asbestos brake shoes, but no asbestos-free brake shoes that are flame retardant and antistatic have been found.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] A method for preparing a flame-retardant antistatic non-asbestos brake shoe, comprising the following steps:

[0015] 1) Take the following raw materials in parts by weight: 10-15 parts of phenolic resin, 5-10 parts of rubber powder, 10-14 parts of ceramic fiber, 1-2 parts of stearic acid, 4-6 parts of coconut fiber, 4-6 parts of artificial mica 7 parts, 8 to 14 parts of diatomite, 3 to 5 parts of graphite, 2 to 4 parts of lead oxide, 3 to 5 parts of kaolin, 20 to 25 parts of wollastonite, 10 to 20 parts of barium sulfate, 10 to 10 parts of sepiolite 15 parts, 3-6 parts of vermiculite, 5-7 parts of zircon, 3-5 parts of antimony trioxide and 3-5 parts of conductive carbon black, set aside;

[0016] 2) Put the ceramic fibers and coconut fibers taken out in step 1) into ethanol, control the temperature of ethanol to 40-50°C and soak for 4-6 hours, take them out after soaking, and dry them under hot air at 50-60°C. spare;

[0017] 3) Add the phenolic resin, rubber powder,...

Embodiment 1

[0023] A method for preparing a flame-retardant antistatic non-asbestos brake shoe, comprising the following steps:

[0024] 1) Take the following raw materials in parts by weight: 10 parts of phenolic resin, 5 parts of rubber powder, 10 parts of ceramic fiber, 2 parts of stearic acid, 4 parts of coconut fiber, 4 parts of artificial mica, 8 parts of diatomaceous earth, and 5 parts of graphite , 2 parts of lead oxide, 5 parts of kaolin, 20 parts of wollastonite, 20 parts of barium sulfate, 10 parts of sepiolite, 3 parts of vermiculite, 7 parts of zircon, 3 parts of antimony trioxide and 5 parts of conductive carbon black ,spare;

[0025] 2) Put the ceramic fiber and coconut fiber taken out in step 1) into ethanol, control the temperature of ethanol to 50°C and soak for 4 hours, take it out after soaking, dry it under hot air at 60°C, and set aside;

[0026] 3) Add the phenolic resin, rubber powder, stearic acid, graphite, wollastonite, sepiolite, vermiculite and zirconite take...

Embodiment 2

[0038] A method for preparing a flame-retardant antistatic non-asbestos brake shoe, comprising the following steps:

[0039] 1) Take the following raw materials in parts by weight: 15 parts of phenolic resin, 10 parts of rubber powder, 14 parts of ceramic fiber, 1 part of stearic acid, 4 parts of coconut fiber, 7 parts of artificial mica, 8 parts of diatomaceous earth, and 5 parts of graphite , 2 parts of lead oxide, 3 parts of kaolin, 25 parts of wollastonite, 10 parts of barium sulfate, 10 parts of sepiolite, 6 parts of vermiculite, 7 parts of zircon, 5 parts of antimony trioxide and 5 parts of conductive carbon black ,spare;

[0040] 2) Put the ceramic fiber and coconut fiber taken out in step 1) into ethanol, control the temperature of ethanol to soak at 40°C for 6 hours, take it out after soaking, dry it under hot air at 50°C, and set aside;

[0041]3) Add the phenolic resin, rubber powder, stearic acid, graphite, wollastonite, sepiolite, vermiculite and zircon taken out...

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PUM

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Abstract

The invention relates to a manufacturing method of a flame-retardant, anti-static and asbestos-free brake shoe. The method comprises the following steps: putting ceramic fibers and coconut fibers into ethanol for soaking, and drying; stirring phenolic resin, rubber powder, stearic acid, graphite, wollastonite, sepiolite, vermiculite and zirconite to obtain a mixture I; stirring artificial mica, diatomite and barium sulfate to obtain a mixture II; stirring lead oxide, kaolin, antimonous oxide and conductive carbon black taken out in step (1) to obtain a mixture III; adding the mixture III into the mixture II, stirring, adding the mixture I, continually stirring, and adding ceramic fibers and coconut fibers to obtain a mixture; putting the mixture into a mold, and performing press molding to obtain a finished brake shoe. The brake shoe manufactured by using the manufacturing method has the advantages of stable friction coefficient, high strength and low wear, and has great popularization significance in the oil exploitation industry and the mine industry.

Description

technical field [0001] The invention relates to the technical field of preparation of friction materials for braking, in particular to a preparation method of a flame-retardant, antistatic and asbestos-free brake shoe. Background technique [0002] Asbestos is mostly used as the friction material in the disc brake shoes of mine hoist used in my country. Under the conditions at that time, it was a friction material with a fair friction coefficient, good mechanical strength, and good adsorption force with the binder. However, asbestos brake shoes also have insurmountable disadvantages: First, asbestos has poor thermal conductivity, and the frictional heat is difficult to disappear quickly, resulting in thickening of the thermal decay layer of the resin, which intensifies wear and tear, and asbestos fibers can cause cancer in the human body. Secondly, the friction coefficient of asbestos brake shoes is not high, and the friction performance is prone to thermal degradation, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02F16D65/04C08L61/06C08L21/00C08K13/04C08K7/04C08K3/34C08K3/04C08K3/22C08K3/30
Inventor 楚广成马乐赵宏林玉芬罗晓磊孙召俊胡松岭李明明冯林刚武志军
Owner 中实洛阳机械工程科技有限公司