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Technology for preparing brake lining through 3D printing

A 3D printing and brake technology, applied in the field of rail transit, can solve the problems of limiting the comprehensive performance of non-asbestos organic brake pads, and achieve the effect of small thermal recession and good thermal recovery.

Inactive Publication Date: 2017-01-04
WUXI MINGSHENG STRONG BLOWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the traditional preparation technology also limits the improvement of the comprehensive performance of asbestos-free organic brake pads

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A process for preparing a brake lining by 3D printing, comprising:

[0023] (1) Mixing: Mix the solid filler evenly by dry method, then prepare the liquid binder and other additives into a glue solution, and spray the solid filler;

[0024] (2) Powder spreading: spread the powder obtained after mixing to a thickness of 0.5 mm;

[0025] (3) Glue spraying: Mix the acetone solution of liquid phenolic resin, coupling agent and plasticizer with the dry powder composed of nitrile rubber powder and reinforcing agent, then add it to absolute ethanol and mix evenly, adjust the colloidal density to 700kg / m 3 , injection pressure 150kPa, spray glue;

[0026] (4) Hot air quick drying: dry at a temperature of 50°C for 100-130 minutes; then cut and stack;

[0027] (5) Hydroforming: hydroforming is carried out at a molding temperature of 130-170°C and a molding pressure of 18-30MPa, and the holding time is 15-30min.

[0028] The brake lining prepared by the above-mentioned proces...

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PUM

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Abstract

The invention discloses a technology for preparing a brake lining through 3D printing. The technology comprises the following steps: (1) materials mixing: performing evenly dry mixing to solid-state filler, preparing a liquid-state adhesive and other additives into a gel forming solution, and spraying to the solid-state filler; (2) paving powder; (3) spraying of gel: adjusting the density of a gel body to be 700kg / m<3> and the injection pressure to be 150kPa, and spraying gel; (4) quick drying with hot-air: drying for 100-130min at the temperature of 50 DEG C; then cutting materials and superposing; and (5) hydraulic molding: performing hydraulic molding at the molding temperature of 130-170 DEG C and under the forming pressure of 18-30MPa, wherein the holding time lasts 15-30min. The frictional coefficient of the brake lining prepared by adopting the technology is stabilized to range from 0.476-0.53 at 100-250 DEG C, the heat fade is small, and the brake lining has good heat restoration, wear resistance and shearing resistance properties.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a system and method for controlling the opening and closing states of platform doors. Background technique [0002] Friction material is a multi-component composite material used for braking and transmission of vehicles and power machinery. Its quality directly affects the reliability of the machine and the life safety of the operator. Friction materials mainly include brake linings (commonly known as brake pads) and clutch facings (commonly known as clutch plates). Brake pads are used for braking and clutch plates are used for transmission. [0003] Asbestos-free organic brake pads, as brake pads with excellent performance, are the mainstream of current applications. At present, there are technical problems in the research and development of asbestos-free organic brake pads, the selection of raw materials, formula design, layer structure design, and process improvement. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02C09K3/14
CPCF16D69/02C09K3/14F16D2200/0086
Inventor 张达明
Owner WUXI MINGSHENG STRONG BLOWER
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