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A kind of composite material preparation process for making electric brush

A composite material and preparation process technology, applied in brush manufacturing, circuits, current collectors, etc., can solve the problems of high finished product price, high manufacturing cost, low cost, etc., to achieve large profit margins, low manufacturing costs, and improve competitiveness. Effect

Active Publication Date: 2020-01-31
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although existing products already have products that can meet the above standards, their manufacturing costs are high and the process is complicated, which directly leads to high prices of finished products, which is not conducive to market competition of manufacturers.
[0005] Therefore, the applicant proposes a composite material preparation process for manufacturing brushes. The process is simple and the cost is low, but the performance of the finished product can meet the current needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A composite material preparation process for manufacturing electric brushes, comprising the steps of:

[0029] S1. The raw material is modified coal tar pitch, the softening point is 90-100°C, the coking value is ≥55%, and the ash content is ≤0.20%;

[0030] Graphite powder, particle size not greater than 2μm;

[0031] Molybdenum disulfide, the fineness is 100-120 mesh;

[0032] Dispersant, select vinyl bis stearamide for use;

[0033] Coke powder, particle size not greater than 2μm;

[0034] Silver powder with a fineness of 90-100 mesh and a purity of 99.9%;

[0035] Copper powder with a fineness of 90-100 mesh and a purity of 99.9%;

[0036] S2, the graphite powder and the dispersant are mixed uniformly according to the ratio of 1:1.8 in parts by weight to make colloidal graphite powder;

[0037] Graphite powder and coke powder are uniformly mixed according to the ratio of parts by weight of 3:1, then put into the graphitization furnace, filled with argon gas, an...

Embodiment 2

[0047] A composite material preparation process for manufacturing electric brushes, comprising the steps of:

[0048] S1. The raw material is modified coal tar pitch, the softening point is 90-100°C, the coking value is ≥55%, and the ash content is ≤0.20%;

[0049] Graphite powder, particle size not greater than 2μm;

[0050] Molybdenum disulfide, the fineness is 100-120 mesh;

[0051] Dispersant, can be vinylbisstearamide, stearamide;

[0052] Coke powder, particle size not greater than 2μm;

[0053] Silver powder with a fineness of 90-100 mesh and a purity of 99.9%;

[0054] Copper powder with a fineness of 90-100 mesh and a purity of 99.9%;

[0055] S2, the graphite powder and the dispersant are mixed uniformly according to the ratio of parts by weight of 1:2 to make colloidal graphite powder;

[0056] Mix graphite powder and coke powder evenly according to the weight ratio of 2.5:1, put them into the graphitization furnace, pass through the protective gas (inert gas),...

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PUM

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Abstract

The invention discloses a preparation process of a composite material used for manufacturing a brush. The preparation process comprises the following steps of S1, preparing raw materials which comprise modified coal pitch, graphite powder, molybdenum disulfide, a dispersing agent, coke powder, silver powder and copper powder; S2, preparing colloidal graphite powder; preparing electrographite powder; and preparing colloidal molybdenum disulfide; S3, enabling the colloidal graphite powder, the electrographite powder, the colloidal molybdenum disulfide and the modified coal pitch to be taken outand mixed uniformly at the mass ratio of 2:2-2.5:1-1.5:0.5-1; and next, enabling the mixture to be poured into a pelletizer to prepare into particles with the particle diameters of 20-40 millimeters to obtain base particles; S4, preparing a working layer raw material; preparing a transition layer raw material; and preparing a welding layer raw material; and S5, enabling the working layer raw material, the transition layer raw material and the welding layer raw material to be paved in a graphite grinding tool at the thickness ratio of 13:5:2 in sequence, and next pumping argon to be used as protective gas, performing hot pressing molding at the temperature of 850-950 DEG C at the pressure of 20-25MPa, and maintaining for 15-20min to obtain a block-shaped material.

Description

technical field [0001] The invention relates to a brush, in particular to a composite material preparation process for making a brush. Background technique [0002] The brush (Brush) is an important component of the motor, responsible for conducting current between the rotating part and the stationary part. Because it is mostly made of graphite, it is also called carbon brush. [0003] Silver brush materials are essential electrical components in aviation and aerospace instrument systems, automatic control systems, and motors, electrical and circuit devices, and are responsible for important tasks such as transmitting electrical energy, electrical signals, contacting and breaking circuits. Therefore, at present, the performance requirements of silver brushes such as low wear rate and long service life, low resistance, low frictional heat generation performance, and low electrical noise are relatively high. [0004] Although existing products already have products that can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R39/20H01R39/26H01R43/12
CPCH01R39/20H01R39/26H01R43/12
Inventor 李园林
Owner DATONG XINCHENG NEW MATERIAL CO LTD