Process for producing low-noise and high-performance electric brushes by using copper-coated graphite powder

Abstract

The invention discloses a process for producing low-noise and high-performance electric brushes by using substitutional copper-coated graphite powder, and the process comprises the following steps: 1) kneading graphite powder and a bonding agent together so as to obtain colloidal graphite powder; 2) mixing the colloidal graphite powder, additives and a release agent so as to obtain mixed powder; 3) adding methanol or a gasoline low-carbon-residue binder dilute-solution in the mixed powder, mixing and then adding copper coated graphite powder into the obtained mixture; and 4) airing the material powder mixed in the step 3), pressing the material powder, and finally, sintering the material powder, thereby obtaining a low-noise and high-performance electric brush. According to the process disclosed by the invention, through adopting chemical substitutional copper coated graphite powder which can be industrialized as raw materials, and overcoming the defects that a chemical substitutional copper coated graphite powder coating is loose, porous and poor in binding force, and in the process of application, a copper plating layer is easy to fall off, a low-noise and high-performance electric brush is prepared. According to the process, a product can be obtained just through one-step molding and low-temperature heat treatment, therefore, the process is simple in working procedure, low in energy consumption, high in efficiency and short in production cycle, and the cost of the process is lower than that of a process implemented by using electrographite.

Description

technical field [0001] The invention relates to electric brush production technology, specifically a process for producing low-noise high-performance electric brushes by replacing copper-plated graphite powder, and belongs to the technical field of electric brushes. [0002] Background technique [0003] The electrical parts of modern cars include generators, batteries, starters and motors for various auxiliary devices, such as wipers, fans and heaters. With the leapfrog development of my country's auto industry, the popularization and popularization of automobiles, and the maturity of China's automobile customer base, people's requirements for the NVH performance of automobiles that customers can directly experience will become higher and higher. NVH refers to Noise (noise), Vibration (vibration) and Harshness (acoustic roughness). Noise and vibration directly affect the comfort, environmental protection and reliability of the car. Noise is one of the harmful emissions o...

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned deficiencies in the existing low-noise brush production process, the purpose of the present invention is to provide a new low-noise high-performance brush production process. This process only needs one-time molding, simple process, low energy consumption and high efficiency. Short production cycle and lower cost than electrochemical graphite