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Granular graphite for brake block and its prepn

A technology of granular graphite and brake pads, which is applied in the field of granular graphite for brake pads and its preparation, can solve the problems of poor performance such as high temperature resistance, high pressure resistance, wear resistance, heat conduction, heat dissipation, and inability to use brake pads, etc., to achieve brake sensitivity Peaceful, less usage, less pollution effect

Inactive Publication Date: 2007-01-03
NANYANG BOXING MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been developments and implementations of granular graphite material technology at home and abroad, but they are mostly used in the production of electrodes and battery products, focusing on the high electrical conductivity of granular graphite materials, and their high temperature resistance, high pressure resistance, wear resistance and thermal conductivity. Poor heat dissipation and other performance, can not be used in the production of brake pads

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 80% of natural high-carbon flake graphite, 10% of petroleum coke, and 10% of starch by mass percentage, and then make it according to the following method: first mix the raw materials and place them in an airtight mixer, and then mix according to the mixture: water=10:1 Add water and stir, the weight ratio of mixture and water is: mixture: water=10: 1, stirred at 62 ℃ of temperature for half an hour, and left standstill at normal temperature for 10 hours, made thick pasty graphite slurry; Use molding equipment to press the graphite slurry into columnar section material, then place the columnar section material in the drying equipment, dry it at 90°C for 4.5 hours, take it out and cool it naturally; finally, use the crushing equipment to crush the dried section material The material is pulverized, and then sieved according to the specifications of 8-14 mesh, 14-24 mesh, and 24-40 mesh to obtain granular graphite products of different specifications.

Embodiment 2

[0021] Weigh 85% of natural high-carbon flake graphite, 10% of petroleum coke, and 5% of starch by mass percentage, and its production steps are basically the same as in Example 1, except that the stirring temperature is 70° C., and the standing time is 13 hours; The temperature is 95°C, and the drying time is 5 hours.

Embodiment 3

[0023] Take by weight 90% of natural high-carbon flake graphite, petroleum coke 5%, and starch 5%, and its production steps are basically the same as in Example 1, except that the stirring temperature is 80°C, and the standing time after stirring is 15 hours; The drying temperature is 100° C., and the drying time is 6 hours.

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Abstract

The present invention relates to one kind of granular graphite for brake block and its preparation process. The granular graphite is prepared with natural scale graphite as basic material and petroleum coke and starch as adhesive, and through mixing while adding water, pressing, stoving, crushing and sieving. The granular graphite may be used in making brake block with high compression strength, high porosity, high heat conductivity, high lubricant performance, low hardness, less friction, less noise, sensitive and smooth braking.

Description

technical field [0001] The invention belongs to the technical field of graphite products, in particular to granular graphite used for brake pads and a preparation method thereof. Background technique [0002] In the known technology, the brake pads in motor vehicles are mainly made of various raw materials such as asbestos, steel fiber, and resin. Disadvantages such as high temperature, poor brake reliability, fast wear, easy aging and fracture, short service life and other defects. Secondly, because asbestos contains carcinogens, it has been banned by the state. At present, as an alternative to asbestos brake pads, they are generally made of mineral fibers, carbon fibers, steel fibers and other materials, but they all have different degrees of low melting point, low thermal stability, poor heat dissipation, small friction coefficient, and braking performance. Poor, short service life, high manufacturing cost and other disadvantages, especially in the state of frequent bra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/536C04B35/632C04B35/622
Inventor 符明含符保武张春爱符晶晶
Owner NANYANG BOXING MINING