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Cross-country friction material composition for disc friction blocks and preparation method

A friction material and mixture technology, applied in the field of friction material composition and preparation, can solve the problems that the final product is difficult to meet the requirements of automobile use, high requirements for hot pressing equipment, product cracks, etc., to achieve easy control of product quality and solve heat conduction problems , prevent the effect of accelerated aging

Inactive Publication Date: 2014-05-14
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unit pressure used in the hot pressing process is too high, and the temperature is also high, so the requirements for hot pressing equipment are relatively high, and energy is wasted
The heat treatment temperature is relatively low for disc friction linings, and the furnace door is opened to cool down to room temperature naturally. As a result, it is difficult for the final product to meet the requirements of automobile use, and the product is prone to cracks or cracks

Method used

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  • Cross-country friction material composition for disc friction blocks and preparation method
  • Cross-country friction material composition for disc friction blocks and preparation method
  • Cross-country friction material composition for disc friction blocks and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] After weighing the reinforcing fiber copper fiber 52, the binder resin 4, and the friction performance regulator friction powder 23 according to the parts by weight, they are put into the mixer at one time, and the mixing time is 15 minutes, and the pressed plastic is prepared;

[0022] Weigh the base material consisting of 100g of fiber material and binder and spread it on the mold, then place the weighed friction material composition on the base material, press at a temperature of 135°C and a pressure of 12.0MPa , using single-cylinder pressing, the pressing time is 15s, the exhausting time is 10s, and the exhausting time is 5 times in total. Follow-up heat treatment is carried out in an electric blast drying oven or other drying equipment. The heat treatment temperature is 200°C, and the temperature range is raised from room temperature The time is 4 hours, and then after storing at 200°C for 10 hours, the product is naturally cooled to room temperature in a closed dr...

Embodiment 2

[0032] A friction material composition for a disc friction block with off-road properties and a preparation method, which contains reinforcing fibers, adhesives, and friction performance modifiers, and its mass components are:

[0033]

[0034] The preparation method is the same as in Example 1.

[0035] Through the test of the friction material composition, the average coefficient of friction at six temperature points of 100°C, 150°C, 200°C, 250°C, 300°C, and 350°C is 0.42, and the total wear rate is 0.72×10 -7 cm 3 / N.m, the thermal conductivity is 85°C, and the bonding strength is 7.2MPa, which meets the technical standards of an enterprise and the requirements of the national GB5763-2008 standard.

Embodiment 3

[0037] A friction material composition for a disc friction block with off-road properties and a preparation method, which contains reinforcing fibers, adhesives, and friction performance modifiers, and its mass components are:

[0038]

[0039] The preparation method is the same as in Example 1.

[0040] Through the test of the friction material composition, the average coefficient of friction at six temperature points of 100°C, 150°C, 200°C, 250°C, 300°C, and 350°C is 0.42, and the total wear rate is 0.72×10 -7 cm 3 / N.m, the thermal conductivity is 85°C, and the bonding strength is 7.2MPa, which meets the technical standards of an enterprise and the requirements of the national GB5763-2008 standard.

[0041] The friction material composition has passed the material test and the bench test shown in Table 1, and the test results prove that it fully meets the requirements for the use of the vehicle brake, and has high social and economic benefits.

[0042]

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Abstract

The invention relates to a cross-country friction material composition for air discs, and the cross-country friction material composition for air discs is characterized by being composed of the following raw materials in parts by weight: 20-52 parts of reinforced fibers, 4-16 parts of an adhesive and 23-86 parts of a friction performance modifier. The cross-country friction material composition for air discs is prepared by the steps of weighing the reinforced fiber, the adhesive and the friction performance modifier by weight to prepare a molding compound, paving a base-layer material formed by weighed fiber material and adhesive on a mold, paving weighed friction material on the base layer to carry out thermocompression, and finally carrying out thermosetting. The cross-country friction material composition for air discs is used for the air disc brakes in complicated road conditions, particularly the cold highland area and wading road conditions, so that a friction material which has good heat recession resistance, high wading restoration performance, temperature alternation repeated impact resistance and stable friction performance is provided.

Description

technical field [0001] The invention relates to a friction material composition for a disc friction block with off-road performance and a preparation method thereof, which is applied to off-road commercial vehicle brakes. Background technique [0002] In recent years, with the continuous improvement of automobile braking performance, the development of air disc brakes has become inevitable. As an important security component of air disc brakes, air disc friction material has become a key research object. At present, many material professionals in the domestic industry are developing air disc friction materials, but the technology is still very immature. According to patent inquiries, there is no literature on friction materials for off-road air disc brakes. [0003] The patent documents of the past two years were searched with friction material as the subject term. Most of the friction materials are patents on the application research of friction materials using a certain s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
Inventor 张明远
Owner CHINA FIRST AUTOMOBILE
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