Production method of single-coating enamelled wire

A production method and enameled wire technology, which is applied in the field of enameled wire, can solve the problems of poor paint film adhesion, etc., and achieve the effects of sufficient baking, improved heat aging performance, and improved heat aging resistance

Active Publication Date: 2014-06-18
江苏中惠电工材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, if it is applied to produce 220-grade high-performance polyamide-imide single-coat enamelled round copper wire, its heat resistance will be further improved, and a higher heat-resistant grade can be applied. However, because of its poor paint film adhesion, It is necessary to ensure that the copper powder in the process is clean enough to ensure that the coating is applied uniformly and achieve the best process, which puts forward high requirements for the applicable coating, paint manufacturing process, especially the cleanliness of the copper powder in the production process

Method used

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  • Production method of single-coating enamelled wire
  • Production method of single-coating enamelled wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The invention discloses a production method of a single-coat enameled wire, which comprises the following steps:

[0020] (1) Pulling:

[0021] Pull the copper rod on the wire drawing equipment to make it a bare copper wire of the size required by the customer;

[0022] (2) Annealing:

[0023] The drawn bare copper wire is annealed in the enamelling machine. The annealing is divided into one-stage annealing and two-stage annealing. 460-480°C, circulation wind speed 3800-4000rpm, exhaust wind speed 1800-2000rpm;

[0024] (3) Paint:

[0025] Select 220-grade polyamide-imide wire enamelled enamel for painting, and the number of paint passes is 10-24. The thickness of the insulating varnish layer is between 0.003-0.004MM, and in this painting step, The difference of each paint coating is less than or equal to 0.001MM.

[0026] (4) Baking:

[0027] The product after step (3) is baked in an oven.

[0028] In this embodiment, 220-grade high-performance polyamide-imide s...

Embodiment 2

[0035] Compared with Embodiment 1, the difference lies in that it further includes a cleaning step, which is continuously cleaned during the painting process.

[0036] Through the cleaning steps, the cleaning effect of copper powder can be guaranteed to the greatest extent, so that the quality of enameled wire products is reliable.

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Abstract

The invention discloses a production method of a single-coating enamelled wire, which includes the following steps: 1 drawing: a copper bar is led to be drawn on drawing equipment to be a bare copper wire with the size required by a user; 2 annealing: the bare copper wire which has been drawn is annealed in an enamelling machine, the annealing comprises first-section annealing and second-section annealing, velocity is 260-270 m / min, curing temperature is 560-580 DEG C, the first-section annealing temperature is 480-500 DEG C, the second-section annealing temperature is 460-480 DEG C, circulation wind speed is 3,800-4,000rpm, and waste discharge wind speed is 1,800-2,000rpm; and 3 painting: 220-level polyamide-imide (PAI) wire enamel is adopted for painting, painting passes: 14-24, and the thickness of the insulated paint layer coated for each pass is 0.003-0.004MM. When the method is used, due to the fact that the method adopts the thin-paint multi-painting mode, each pass of paint is led to be even in thickness, baking is most sufficient, the defect of a single coating is overcome, and excellent paint film adhesion is achieved.

Description

technical field [0001] The invention relates to the technical field of enameled wires, in particular to a method for producing single-coated enameled wires for copper round wires. Background technique [0002] In recent years, electrical equipment has developed towards high performance and miniaturization, so the coils used in important components are also simultaneously miniaturized and lightweight. With the miniaturization of the coil, its working temperature will gradually increase, and the heat level of the enameled wire is also required to be higher and higher. It has become a development trend to improve the temperature resistance level and develop special-purpose enameled wires; Widely used, 220-grade polyamide-imide enameled wire enamel is mainly used for the production of 200-grade composite wire as a topcoat. At present, enameled wire is mainly divided into single-coated enameled wire and composite-coated enameled wire. Compared with composite-coated enameled wire,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B13/16
Inventor 赵毅李家雄王慧峰郑英郑树磷
Owner 江苏中惠电工材料有限公司
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