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Device and method for stripping coating layer of polyimide-coated copper wire

A technology of polyimide and coating layer, which is applied in the field of surface treatment of polymer materials, can solve problems affecting welding quality, copper core surface oxidation, high heating temperature, etc., achieve rapid stripping, reduce copper core oxidation, and reduce copper The effect of core temperature

Active Publication Date: 2020-04-17
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, mechanical stripping will cause mechanical damage such as scratches on the copper core of the enameled wire, reducing its strength; the laser stripping method uses the instantaneous high temperature generated by the laser to decompose polyimide, but for the enameled wire with a small wire diameter, the instantaneous high temperature will be in A thicker oxide layer is formed on the surface of the copper core and even the copper core is melted; the method of chemical corrosion is to heat the solid alkali to above 400°C to melt it and decompose the polyimide coating. After removal, the surface of the copper core is severely oxidized, which affects the welding quality and takes a long time to prepare

Method used

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  • Device and method for stripping coating layer of polyimide-coated copper wire
  • Device and method for stripping coating layer of polyimide-coated copper wire
  • Device and method for stripping coating layer of polyimide-coated copper wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Enameled wire diameter 0.15mm, coating thickness 0.01mm. Pour the paint stripping powder into an iron crucible, set the temperature at 200°C, heat until the paint stripping powder is completely melted, and keep it warm for 5 minutes. Pass the enameled wire through the collimator, insert it vertically into the molten liquid, the length of immersion in the liquid is 5mm, let it stand for 8s, and take it out. Rinse in deionized water for 5 seconds, take it out, and blow dry.

[0057] The paint remover 2 includes the following components in mass percent: 13% sodium hydroxide, 42% potassium hydroxide, 20% sodium acetate, and 25% sodium cellulose.

[0058] The surface of the copper core of the enameled wire after removing the coating layer in the embodiment of the present invention is bright and free of oxidation, the coating is completely removed without residue, the boundary is neat and there is no transition, the coating stripping length is 5 mm, and the schematic diagram...

Embodiment 2

[0060] The diameter of the enameled wire is 0.2mm, and the thickness of the coating is 0.015mm. Pour the paint stripping powder into an iron crucible, set the temperature at 210°C, heat until the paint stripping powder is completely melted, and keep it warm for 5 minutes. Pass the enameled wire through the collimator, insert it vertically into the molten liquid, and immerse it in the liquid to a length of 15 mm, let it stand for 10 seconds, and then take it out. Rinse in deionized water for 5 seconds, take it out, and blow dry.

[0061] The paint remover 2 includes the following components in mass percentage: 11% sodium hydroxide, 44% potassium hydroxide, 18% sodium acetate, and 27% sodium cellulose.

[0062] The surface of the copper core of the enameled wire after removing the coating layer in the embodiment of the present invention is bright and free of oxidation, the coating is completely removed without residue, the boundary is neat and there is no transition, and the coa...

Embodiment 3

[0064] The wire diameter of the enameled wire is 0.3mm, and the thickness of the coating is 0.02mm. Pour the paint stripping powder into an iron crucible, set the temperature at 210°C, heat until the paint stripping powder is completely melted, and keep it warm for 5 minutes. Pass the enameled wire through the collimator, insert it vertically into the molten liquid, and immerse it in the liquid for a length of 10 mm, let it stand for 12 seconds, and then take it out. Rinse in deionized water for 5 seconds, take it out, and blow dry.

[0065] The paint remover 2 includes the following components in mass percentage: 114% sodium hydroxide, 45% potassium hydroxide, 21% sodium acetate, and 20% sodium cellulose.

[0066] The surface of the copper core of the enameled wire after removing the coating layer in the embodiment of the present invention is bright and free from oxidation, the coating is completely removed without residue, the boundary is neat and there is no transition, and...

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Abstract

The invention relates to a device and a method for stripping a coating layer of a polyimide-coated copper wire. The method comprises the following steps: designing a special stripping tool and preparing paint removing powder with specific component content, heating the low-melting-point paint removing powder to be above the melting point, melting the paint removing powder into a liquid state, quickly decomposing the polyimide coating layer by utilizing the molten paint removing powder such that the molten paint removing powder does not react with a copper core and the copper core is not damaged to realize the non-destructive stripping of the polyimide coating, and meanwhile, guiding an enameled wire to be vertically inserted into the molten liquid of the paint removing powder by adopting athreading device perpendicular to the liquid level to ensure the orderliness of a removed interface. The stripping device and the stripping method have the advantages of quickness, no damage to a wire core, tidy interface and the like, can be used for surface treatment of polyimide coating enameled wires of precision mechanical and electrical products such as precision instruments and precision motors before welding, and the welding reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of polymer materials, and in particular relates to a device and a stripping method for quickly and non-damagingly stripping the coating layer of a polyimide copper-clad wire. Background technique [0002] Polyimide-coated enamelled copper wire is referred to as enameled wire for short. It has the advantages of high temperature resistance, good mechanical properties, and excellent insulation performance. It is widely used in high-tech industries such as aerospace, microelectronics, electrical, chemical, and energy technology. In actual use, enameled wires often need to be welded with other electronic components. In order to ensure the welding performance and contact reliability, the polyimide coating layer on the welding part of the enameled wire needs to be stripped before welding. For precision instruments with high reliability requirements, it is usually required that the wire core is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R43/28C09D9/00
CPCC09D9/00H01R43/28
Inventor 邱增帅李彦博崔庆龙刘建梅严小军
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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