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Semi-wet mixing and dust-suppressing technology for automobile friction material

A friction material and semi-wet technology, which is applied in the field of automobile friction material semi-wet mixing and dust reduction technology, can solve the problems of large production dust, low production capacity, and affecting the health of employees

Active Publication Date: 2018-12-18
浙江昌达汽车零部件制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry production method is to mix dozens of powder and fiber materials evenly in the mixer, and the cost is relatively low. The disadvantage is that each process produces a lot of dust, which is likely to cause air pollution and affect the health of employees.
The wet process uses styrene-butadiene rubber, nitrile rubber, sulfur, accelerators, anti-aging agents and other powders and fiber materials for mixing and kneading. After mixing, it is pulled into sheets by a rubber mixer and then granulated by a granulator. , the advantage is that all the materials are wrapped together with rubber without dust. The disadvantage is that the energy consumption is high, the cost is high, and the production capacity is low. At the same time, because it contains a lot of rubber, it is not resistant to high temperature, and the product cannot be used in high temperature fields such as commercial vehicles.

Method used

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  • Semi-wet mixing and dust-suppressing technology for automobile friction material
  • Semi-wet mixing and dust-suppressing technology for automobile friction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a) Mixing: After the raw materials are weighed according to the proportion, they are transferred to the mixer, stirred and mixed evenly at high speed under three sets of rake paddles and four sets of high-speed flying knives to obtain a first-level mixture; the raw materials and their proportions are: 10% phenolic resin, 10% zircon, 15% phosphorus flake graphite, 15% barium sulfate, 15% talcum powder, 35% glass fiber;

[0025] b) Dust reduction: Add low molecular weight phenolic resin with a molecular weight of 375 to the primary mixture through the three liquid injection holes of the mixer, and the addition method is high-pressure mist spraying, and the spraying angle is 60°, without dripping , after spraying, the material is discharged quickly to obtain a secondary mixture, and the water content of the secondary mixture is measured to be less than 1.2%;

[0026] c) Aging: Transfer the secondary mixture to the dehumidification room and lay it open for dehumidification ...

Embodiment 2

[0029] a) Mixing: After the raw materials are weighed according to the proportion, they are transferred to the mixer, stirred and mixed evenly at high speed under three sets of rake paddles and four sets of high-speed flying knives to obtain a first-level mixture; the raw materials and their proportions are: 5% phenolic resin, 5% nitrile powder, 5% zircon, 5% alumina, 10% phosphorus flake graphite, 5% granular graphite, 15% barium sulfate, 15% talcum powder, 20% mineral fiber, ceramic fiber 15%;

[0030] b) Dust reduction: Add low molecular weight phenolic resin, with a molecular weight of 527, into the first-stage mixture through the three liquid injection holes of the mixer, and the addition method is high-pressure mist spraying, and the spraying angle is 70°, without dripping , after spraying, the material is discharged quickly to obtain a secondary mixture, and the water content of the secondary mixture is measured to be less than 1.2%;

[0031] c) Awakening: transfer the...

Embodiment 3

[0034] a) Mixing: After the raw materials are weighed according to the proportion, they are transferred to the mixer, stirred and mixed evenly at high speed under three sets of rake paddles and four sets of high-speed flying knives to obtain a first-level mixture; the raw materials and their proportions are: 5% phenolic resin, 5% nitrile powder, 5% iron ore, 5% alumina, 10% zircon, 15% coke, 10% barium sulfate, 10% talcum powder, 10% barite powder, mineral fiber 5%, glass fiber 15%, carbon fiber 5%.

[0035] b) Dust reduction: Add low molecular weight phenolic resin with a molecular weight of 769 to the primary mixture through the three liquid injection holes of the mixer, and the addition method is high-pressure mist spraying, and the spraying angle is 50°, without dripping , after spraying, the material is discharged quickly to obtain a secondary mixture, and the water content of the secondary mixture is measured to be less than 1.2%;

[0036] c) Aging: transfer the secondary...

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Abstract

The invention relates to a preparation method of an automobile friction material, and especially relates to a semi-wet mixing and dust-suppressing technology for the automobile friction material. Thetechnology concretely comprises the following steps: a) weighing raw materials in proportion, transferring the weighed raw materials into a mixer, and uniformly mixing the raw materials to obtain a primary mixture; b) adding a dust suppressant to the primary mixture in a droplet-free high-pressure mist spraying manner, and quickly discharging the obtained material after the spraying is completed in order to obtain a secondary mixture; c) transferring the secondary mixture into a dehumidification room, and carrying out dehumidification and static elimination; and d) adding a tertiary mixture obtained in step c) into a hot press, carrying out a four-stage hot pressing process, and demolding the pressed mixture after fourth-stage pressure maintaining ends. The amount of flying dusts generatedin the hot pressing process in the invention is about 90% less than that of flying dusts generated by a dry technology of the same raw materials.

Description

technical field [0001] The invention relates to a method for preparing automobile friction materials, in particular to a semi-wet mixing and dust reduction process for automobile friction materials. Background technique [0002] Friction material is an indispensable and important part in the transmission and braking fields of automobiles, trains, airplanes, and ship construction machinery industries. Its main function is to reduce the relative motion between the friction material and the attached parts through friction, and at the same time transfer the kinetic energy converted into heat, which is then absorbed or dissipated. [0003] Friction materials for automobile braking are also called brake pads, and the raw materials are generally composed of resin, reinforcing fiber, friction performance modifier, etc. Traditional brake pads are mainly reinforced with asbestos fibers. Since asbestos was found to be an important carcinogen, semi-metallic friction materials with meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/12C04B26/04
CPCC04B26/04C04B26/122C04B2111/00362C04B14/046C04B14/024C04B14/368C04B14/042C04B14/42C04B24/2652C04B14/303C04B14/46C04B14/022C04B14/386
Inventor 沈洪泉
Owner 浙江昌达汽车零部件制造有限公司
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