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Hot tinning process of ultrafine copper wire

A technology of hot-dip tinning and copper wire, which is applied in the direction of hot-dip plating process, metal material coating process, coating, etc., can solve problems such as broken wires and tin layer falling off, and achieve improved corrosion resistance, lower melting point, and good The Effect of Adhesion and Plating Rate

Inactive Publication Date: 2021-07-13
JIANGXI FUHONG METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the hot-dip tinning process of ultra-fine copper wires, problems such as disconnection and tin layer peeling are easy to occur

Method used

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  • Hot tinning process of ultrafine copper wire
  • Hot tinning process of ultrafine copper wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A hot-dip tinning process for ultra-fine copper wires. Take 0.03mm pure copper wires and wires for unwinding, and then enter the annealing tube for annealing. After annealing, dry them, enter tin liquid for tinning, and take up the wires after cooling. , making ultra-fine copper wire; wherein, before the annealing treatment, the surface of the copper wire is continuously coated with ethanol when the wire is released;

[0035] Three temperature sections are set in the annealing tube for annealing treatment.

[0036] The three temperature sections include:

[0037] The first temperature section: 130°C, while placing carbon powder on the inner wall of the annealing tube, the take-up speed is 100m / min;

[0038] The second temperature section: 190°C, take-up speed: 210m / min;

[0039] The third temperature section: 260°C, take-up speed: 350m / min;

[0040] The temperature at which the copper wire exits the annealing tube is controlled below 40°C.

[0041] After drying, the...

Embodiment 2

[0047] A hot-dip tinning process for ultra-fine copper wires. Take 0.03mm pure copper wires and wires for unwinding, and then enter the annealing tube for annealing. After annealing, dry them, enter tin liquid for tinning, and take up the wires after cooling. , making ultra-fine copper wire; wherein, before the annealing treatment, the surface of the copper wire is continuously coated with ethanol when the wire is released;

[0048] Three temperature sections are set in the annealing tube for annealing treatment.

[0049] The three temperature sections include:

[0050] The first temperature section: 150°C, and carbon powder is placed on the inner wall of the annealing tube at the same time, and the take-up speed is 130m / min;

[0051] The second temperature section: 220°C, take-up speed: 250m / min;

[0052] The third temperature section: 310°C, take-up speed: 350m / min;

[0053] The temperature at which the copper wire exits the annealing tube is controlled below 40°C.

[00...

Embodiment 3

[0060] A hot-dip tinning process for ultra-fine copper wires. Take 0.03mm pure copper wires and wires for unwinding, and then enter the annealing tube for annealing. After annealing, dry them, enter tin liquid for tinning, and take up the wires after cooling. , making ultra-fine copper wire; wherein, before the annealing treatment, the surface of the copper wire is continuously coated with ethanol when the wire is released;

[0061] Three temperature sections are set in the annealing tube for annealing treatment.

[0062] The three temperature sections include:

[0063] The first temperature section: 180°C, and carbon powder is placed on the inner wall of the annealing tube at the same time, and the take-up speed is 200m / min;

[0064] The second temperature section: 230°C, take-up speed: 300m / min;

[0065] The third temperature section: 400°C, take-up speed: 400m / min;

[0066] The temperature at which the copper wire exits the annealing tube is controlled below 40°C.

[00...

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Abstract

The invention discloses a hot tinning process of an ultrafine copper wire, and belongs to the field of tinned copper wires. The process comprises the following steps: taking a copper wire for paying off, then placing the copper wire into an annealing tube for annealing, drying the copper wire after annealing, placing the copper wire into tin liquid for tinning, and taking up the copper wire after cooling to prepare the ultrafine copper wire. Before annealing, the surface of the copper wire is continuously coated with ethanol during paying off; at least three temperature sections are arranged in the annealing tube for annealing, and the temperature of the copper wire out of the annealing tube is controlled to be 40 DEG C or below. According to the hot tinning process, the internal stress of the copper wire can be fully released by adopting multi-section temperature annealing, so that the surface stress of the copper wire is reduced, subsequent processing is facilitated, and the quality of the tinned copper wire is improved.

Description

technical field [0001] The invention relates to the field of tinned copper wires, in particular to a hot-dip tinning process for ultra-fine copper wires. Background technique [0002] Tin plating on the surface of the wire can greatly improve the corrosion resistance and oxidation resistance of the copper wire, and make the copper conductor have brazing performance. It is a basic material in the electronics industry and is suitable for the production of leads for electronic components and jumpers for circuit boards . With the continuous development of electronic components and equipment in the direction of miniaturization, micro-wire, and high integration, and the development of electronic packaging technology in the direction of automation and high efficiency, the performance requirements for products such as tinned copper wires are getting higher and higher. [0003] In the production of wires and cables, the most commonly used plated wire is tinned copper wire. In its pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/02C23C2/08C23C2/38C22F1/08C22F1/02C23F11/08
CPCC23C2/02C23C2/08C23C2/38C22F1/08C22F1/008C22F1/02C23F11/08
Inventor 欧阳艳青
Owner JIANGXI FUHONG METAL CO LTD
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