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Composite mineral fibre reinforced brake liner and preparation process and special device therefor

A composite mineral fiber and reinforced technology, applied in the direction of friction linings, mechanical equipment, etc., can solve the problems of brake pad expansion and cracking, large temperature gradient, uneven heat transfer, etc., to avoid expansion and cracking, thermal stress The effect of uniform distribution and uniform internal heat transfer

Inactive Publication Date: 2008-09-17
HEBEI ZHENGDA FRICTION BRAKE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Utilizing this process to prepare disc brake pads has the following disadvantages: the filling process in this process is to directly fill the mixture of powdery lining into the mold and heat it to bond with the steel back. The uneven heat transfer and large temperature gradient of the mixture will make the powdery mixture unable to obtain uniform chemical reaction and uniform change of physical shape, resulting in uneven distribution of thermal stress in the internal structure of the prepared brake pad, and the prepared brake pad The pads are prone to insurmountable defects such as expansion and cracks during use; although this process makes the brake pads one-time molded, the mold for preparing the brake pads is too thick and heavy, which makes the hot pressing time longer and consumes more power. There is also the defect of low production efficiency (one production equipment can only produce about 20 per hour)
Using this process to prepare disc brake pads, there are defects that the steel back and brake pad linings are easy to fall off during use

Method used

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  • Composite mineral fibre reinforced brake liner and preparation process and special device therefor
  • Composite mineral fibre reinforced brake liner and preparation process and special device therefor
  • Composite mineral fibre reinforced brake liner and preparation process and special device therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of the first steel back

[0042] That is, the tailoring of the steel back: use a punch to make a formed brake pad steel back, clean and polish the surface, and apply a layer of phenolic resin 2123 adhesive;

[0043] Preparation of lining material in the second step

[0044]Weigh 20 kg of sepiolite fiber, 10 kg of wollastonite needle fiber, 10 kg of modified slag wool, 2 kg of cellulose fiber, 8 kg of modified phenolic resin 2123 as binder, 20 kg Graphite as a lubricant and 15 kg of barium sulfate as a filler, drying and crushing processes were carried out, and then 0.01 kg of r- Aminopropyltriethoxysilane is used as coupling agent and 0.02 kg of phosphate ester amine salt as antistatic agent and other pretreatment procedures are prepared into required powder;

[0045] The third step cold pressing

[0046] Fill the steel back 14 and the weighed powdery lining material 17 (the steel back 14 is below) into such as figure 1 and figure 2 In the mold cavity ...

Embodiment 2

[0056] Preparation of the first steel back

[0057] That is, the tailoring of the steel back: use a punch to make a formed brake pad steel back, clean and polish the surface, and apply a layer of phenolic resin J04 adhesive;

[0058] Preparation of lining material in the second step

[0059] Weigh 10 kg of sepiolite fiber, 5 kg of wollastonite needle fiber, 5 kg of modified slag wool, 8 kg of paper fiber, 12 kg of nano-modified phenolic resin as adhesive, 5 kg Graphite and 5 kg of friction agent are used as lubricant and 20 kg of heavy calcium as filler, which are dried and pulverized respectively, and then separated into sepiolite fiber, wollastonite needle fiber, modified slag wool and paper fiber Add 0.06 kg of anilinomethyltriethoxysilane as coupling agent and 0.05 kg of antistatic agent TM to mix and other pretreatment processes to prepare required powder;

[0060] The third step cold pressing

[0061] With embodiment 1;

[0062] The fourth step is hot pressing curing...

Embodiment 3

[0068] Preparation of the first steel back

[0069] Same as Example 1

[0070] Preparation of lining material in the second step

[0071] Weigh 10 kg of wollastonite needle-like fiber, 10 kg of modified slag wool, 8 kg of cellulose fiber, 10 kg of nitrile rubber modified phenolic resin as adhesive, 5 kg of mica, 5 kg of Talc powder and 5 kg of friction material are used as lubricant, 15 kg of barite, 10 kg of wollastonite as filler, and 8 kg of ferrochrome powder are used to increase the friction coefficient. Prepared by adding 0.015 kg of r-aminopropyltriethoxysilane as coupling agent and 0.02 kg of phosphate amine salt as antistatic agent to stone needle-shaped fibers, modified slag wool and cellulose fibers. into the desired powder form;

[0072] The third step cold pressing

[0073] With embodiment 1;

[0074] The fourth step is hot pressing curing

[0075] Arrange the cold-formed brake pad blanks into the Figure 4 In the second cavity 11 of the vulcanized plate 12...

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Abstract

The invention discloses a method for producing brake plate, especially one composite mineral fiber strengthen brake liner. Wherein, said liner uses the composite mineral fiber that containing meerschaum fiber, grammite needle fiber and modified slag wool; the adhesive; the lubricant; and the stuff as raw materials; via preparing steel back, preparing liner material, cold compression molding, hot-pressed solidifying, thermal treatment, etc, to be processed into the final product. The invention uses composite mineral fiber as strengthen material, and adds cold compression molding process, to obtain uniform heat stress distribution, and overcome the defects as crank, while the invention has lower cost and high producing efficiency.

Description

technical field [0001] The invention belongs to the technical field of brake pad preparation, and specifically discloses a composite mineral fiber reinforced brake lining, its preparation process and special equipment. Background technique [0002] Friction material products are mainly brake linings (commonly known as brake pads) and clutch facings, which are mainly used in various vehicles such as automobiles and construction machinery. Because asbestos dust is harmful to human health, at present, the friction material industry in most advanced countries in the world has completely banned the use of traditional asbestos materials. my country stipulates that since October 2003, asbestos can no longer be used in brake pads. At present, the most commonly used non-asbestos brake pads at home and abroad are semi-metallic brake pads, and the reinforcing materials are mainly steel fibers and iron powder. However, semi-metallic brake pads also have the characteristics of easy to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D69/02C08J5/14
Inventor 王彦钧杨凤岭王文菲汤希庆贾春旭
Owner HEBEI ZHENGDA FRICTION BRAKE MATERIAL
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