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A kind of semi-wet mixing dust reduction technology of automobile friction material

A friction material and semi-wet technology, which is applied in the field of semi-wet mixing of automobile friction materials and dust reduction technology, can solve the problems of low cost, high temperature resistance, unusability, etc., and achieve the effect of uniform distribution and avoiding the upper light and the lower heavy

Active Publication Date: 2021-09-03
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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  • A kind of semi-wet mixing dust reduction technology of automobile friction material
  • A kind of semi-wet mixing dust reduction technology of automobile friction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a) mixed: After the raw material is adjusted, transfer to the mixer, high-speed stirring in three sets of plow paddle and four sets of high-speed flying knives, resulting in a first-stage mixing; raw materials and ratio: 10% of the phenolic resin, 10% zirconium, 15%, 15% sulfate, cerium sulfate, and 35% of the glass fibers;

[0025] b) During the dust cut: The low molecular weight phenol resin is added to the primary mixture by the three nipple holes of the mixer, the molecular weight is 375, the addition method is a high pressure haze spray, the spray angle is 60 °, and there is no bit drop After the spray, quickly discharge, obtain the secondary mixing, and the moisture of the secondary mixture is less than 1.2%;

[0026] c) Wobble: Transfer the secondary mixing to the open lay flooring of the dehumidium to remove the static electrostatic electricity, resulting in three-stage mixing; the humidity of the wet room is 30% RH, temperature is 15 ° C, measured three-stage mixed...

Embodiment 2

[0029] a) mixed: After the raw material is adjusted, transfer to the mixer, high-speed stirring in three sets of plow paddle and four sets of high-speed flying knives, resulting in a first-stage mixing; raw materials and ratio: 5% phenolic resin, 5% nitrile powder, 5% zirconium stone, 5% alumina, phosphorus graphite, 5% particle graphite, 15% sulfate, mineral fiber, mineral fibers 20%, ceramic fiber 15%;

[0030] b) Dimening: The three hydrothermal holes of the mixer add a low molecular weight phenol resin, a molecular weight of 527, and the addition method is a high pressure haze spray, the spray angle is 70 °, and there is a drop After the spray, quickly discharge, obtain the secondary mixing, and the moisture of the secondary mixture is less than 1.2%;

[0031] c) Wobble: Transfer the secondary mixing to the open lay flooring of the dehumidium to remove the static electrostatic electricity, resulting in three-stage mixing; the humidity of the dehumidium is 27% RH, temperature i...

Embodiment 3

[0034] a) mixed: After the raw material is adjusted, transfer to the mixer, high-speed stirring in three sets of plow paddle and four sets of high-speed flying knives, resulting in a first-stage mixing; raw materials and ratio: 5% phenolic resin, 5% tannanitrile powder, 5%, alumina, zircon oxide 10%, coke 15%, barium sulfate, 10% olite powder, 10% ore powder, mineral fiber 5%, 15% of glass fibers, 5% carbon fiber.

[0035] b) Dimening: The low molecular weight phenolic resin is added to the primary mixture by the three nipple holes of the mixer, the molecular weight is 769, the addition method is a high pressure haze spray, the spray angle is 50 °, and there is a drop After the spray, quickly discharge, obtain the secondary mixing, and the moisture of the secondary mixture is less than 1.2%;

[0036] c) feeding awake: The blend was transferred to a two desiccant for dehumidifying room open laying of the static eliminating 30h, to give three mixing; dehumidified room humidity of 25%...

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Abstract

The invention relates to a preparation method of an automobile friction material, in particular to a semi-wet method of mixing dust for an automobile friction material. It specifically includes the following steps: a) After the raw materials are weighed according to the proportion, transfer them to a mixer and mix them evenly to obtain a primary mixture; b) Add a dust suppressant to the primary mixture in the form of high-pressure mist Spray liquid without dripping, and quickly discharge the material after spraying to obtain the secondary mixture; c) transfer the secondary mixture to the dehumidification room for dehumidification and static electricity removal; d) put the tertiary mixture into the hot press, separate Four times of hot pressing process, after the fourth holding pressure, the mold is released. The fugitive dust generated in the hot pressing operation process of the invention can be reduced by about 90% compared with the dust generated by the same raw material dry process.

Description

Technical field [0001] The present invention relates to the preparation method of automotive friction materials, and more particularly to a mixture of automobile friction materials. Background technique [0002] Friction materials are an important component that is indispensable in driving and brakes in automobiles, trains, aircraft, ship, ship construction, which is the main role to reduce the relative movement between the friction material and bonded by it. Convert to heat, then absorb heat or exudes heat. [0003] Car brake friction materials is also known as brake pads, raw materials are generally composed of resins, enhanced fibers, frictional performance modifiers, and the like. The traditional brake pad is mainly based on the cotton fiber, since it finds that asbestos is an important carcinogen, the metal fibers are developed to increase the semi-metallic friction materials, which has been widely used in various types of vehicles. move. In recent years, in order to improve...

Claims

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Application Information

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Patent Type & Authority Patents(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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