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Surface treatment method of car part of inert material

A technology of auto parts and inert materials, which is applied in the field of surface treatment of auto parts, can solve the problems affecting the appearance quality of products, the timeliness of the coating layer is not strong, the influence of the uniform surface shape of the treatment, etc., and achieve excellent thermal stability and chemical stability. Inertness, improvement of molecular chemical properties, and high product quality

Active Publication Date: 2010-07-28
DONGGUAN HIROSAWA AUTOMOTIVE TRIM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the method of coating the anti-seepage coating has defects such as cumbersome process, poor timeliness of the coating layer, and easy detachment from the surface of the workpiece.
[0005] In order to enhance the surface activity of the material, or form a chemically inert layer on the surface of the material, there are also surface treatment methods such as plasma spraying or flame burning, but these methods have the following defects: 1. Damage to the material surface, 2. Uniform treatment The performance is affected by the surface shape of the material, especially for some three-dimensional workpieces with complex spatial structures. Deformation affects the appearance quality of the product. 5. It requires specific clamping tools to cooperate, which reduces production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a. Put the workpiece into a closed cavity, so that the surface of the workpiece to be treated is fully exposed to the cavity; b. Extract the air in the cavity to reduce the air pressure in the cavity to 180mbar ~ 220mbar; c. Put nitrogen- The fluorine mixed gas is injected into the cavity, so that the fluorine content of the gas in the cavity is 10% to 20%, the air pressure in the cavity is kept at 380mbar to 420mbar, and the temperature in the cavity is kept at 20°C to 25°C, Molecular replacement of fluorine atoms in the gas with hydrogen atoms on the surface of the workpiece to form a C-F bond on the surface of the workpiece for 3 minutes to 5 minutes; d. Inject air with a pressure of 600-700mbar into the cavity at least twice to rinse the surface of the workpiece , use air to flush the surface of the workpiece, and drive the fluorine-containing gas out of the cavity through the exhaust pipe, open the cavity to take out the workpiece, remove the residual fluorine-conta...

Embodiment 2

[0036]a. Put the workpiece into a closed cavity, so that the surface of the workpiece to be treated is fully exposed to the cavity; b. Extract the air in the cavity to reduce the air pressure in the cavity to 180mbar ~ 220mbar; c. Put nitrogen- The fluorine mixed gas is injected into the cavity, so that the fluorine content of the gas in the cavity is 10%-20%, the air pressure in the cavity is kept at 380mbar-420mbar, and the temperature in the cavity is kept at 65°C-75°C, Molecular replacement of fluorine atoms in the gas with hydrogen atoms on the surface of the workpiece to form a C-F bond on the surface of the workpiece for 60min to 120min; d. Inject air with a pressure of 600-700mbar into the cavity at least twice to rinse the surface of the workpiece , use air to flush the surface of the workpiece, and drive the fluorine-containing gas out of the cavity through the exhaust pipe, open the cavity to take out the workpiece, remove the residual fluorine-containing gas in the ...

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PUM

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Abstract

The invention relates to a surface treatment method of a car part of inert material. The surface treatment method comprises the following steps of: firstly, putting a working piece in a closed hollow cavity so that the surface of the working piece to be processed is fully exposed in the hollow cavity; then, pumping air in the hollow cavity; injecting fluorinated gases in the hollow cavity so that the fluorinated volume of the gases in the hollow cavity is 10-20 percent; keeping gas pressure in the hollow cavity as 380-420 mbar so that molecular replacement is carried out between fluorine atoms in the gases and fluorine atoms on the surface of the working piece, and C-F keys are formed on the surface of the working piece; and finally, removing residual fluorinated gases in the hollow cavity and taking out the working piece from the hollow cavity. After the working piece is processed, the surface adhesion is improved, and the surface wettability of the working piece is improved by a coating. Because the C-F keys have high key energy, the working piece has excellent heat stability and chemical inertia and good anti-leakage performance. The invention does not damage the working piece material by even treatment and has high qualified product rate, high production efficiency and low production cost.

Description

Technical field: [0001] The invention relates to the technical field of surface treatment of auto parts, in particular to a surface treatment method for auto parts made of inert materials. Background technique: [0002] For some auto parts made of fluorine-free inert materials such as plastics and EPDM profiles, such as airbag covers, steering wheels, etc., before the coating process, in order to ensure the coating effect, it is necessary to The surface of the workpiece is pretreated, the purpose of which is to remove oil, dust, organic pollutants and other stains on the surface of the workpiece, clean the surface of the workpiece, and at the same time improve the tension and adhesion of the surface of the workpiece, so as to avoid bubbles during the coating process and poor adhesion of the paint. stable defects. [0003] At present, the methods of pre-painting the above-mentioned types of workpieces generally include grinding, high-pressure washing, etc. to clean the surfa...

Claims

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Application Information

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IPC IPC(8): C08J7/12
Inventor 庄吴钏杜伶俐
Owner DONGGUAN HIROSAWA AUTOMOTIVE TRIM