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Manufacturing method of corona-resistant polyimide film sintered enamelled copper strap wires

A technology of polyimide film and manufacturing method, which is applied in the direction of cable/conductor manufacturing, circuit, electrical components, etc., can solve the problems of being unable to withstand high temperature, high pressure, and limited mechanical properties, and achieve strong mechanical properties and increase corona resistance High performance and high corona resistance

Active Publication Date: 2014-04-23
SICHUAN JINRUI ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the problems of the existing copper flat wires that cannot withstand high temperature, high pressure, and limited mechanical properties, a corona-resistant polyimide with high temperature resistance, high voltage resistance, and strong mechanical properties is specially proposed. Production process of thin film sintered enamelled copper flat wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for manufacturing a corona-resistant polyimide film sintered enamelled flat copper wire, the steps comprising:

[0027]A. Process copper conductors to make copper flat wires: first transport the copper plate to the copper plate holding furnace, the temperature of the copper plate holding furnace is 1150°C, cover the surface of the copper plate with baked charcoal to remove oxygen, and the covering thickness is 100mm. Melt the copper plate into copper liquid, insert the crystallizer into the copper liquid to a depth of 130mm, the water inlet starts to enter the water, the water inlet temperature is 30°C, and the water inlet pressure is 0.20MPa, after the copper liquid is cooled and formed, the draw bar pulls and forms the round wire billet. Traction air pressure of disc and lead rod is 0.25MPa;

[0028] The round wire billet is continuously extruded to form a flat copper wire. During extrusion production, the compaction pressure is 40MPa, the tooling is cooled, ...

Embodiment 2

[0032] A method for manufacturing a corona-resistant polyimide film sintered enamelled flat copper wire, the steps comprising:

[0033] A. Process copper conductors to make copper flat wires: first transport the copper plate to the copper plate holding furnace, the temperature of the copper plate holding furnace is 1180°C, cover the surface of the copper plate with baked charcoal to remove oxygen, and the covering thickness is 150mm. Melt the copper plate into copper liquid, insert the crystallizer into the copper liquid to a depth of 140mm, the water inlet starts to enter the water, the temperature of the water is 35°C, and the pressure of the water is 0.35MPa. , draw rod traction air pressure 0.30MPa;

[0034] The round wire billet is formed into a flat copper wire by continuous extrusion. During extrusion production, the compaction pressure is 40MPa, the tooling is cooled, the temperature is 60°C, the current is controlled at 180A, and the extrusion temperature is maintaine...

Embodiment 3

[0038] A method for manufacturing a corona-resistant polyimide film sintered enamelled flat copper wire, the steps comprising:

[0039] A. Process copper conductors to make copper flat wires: first transport the copper plate to the copper plate holding furnace, the temperature of the copper plate holding furnace is 1165°C, cover the surface of the copper plate with baked charcoal to remove oxygen, and the covering thickness is 120mm. Melt the copper plate into copper liquid, insert the crystallizer into the copper liquid to a depth of 135mm, the water inlet starts to enter the water, the temperature of the water is 332°C, and the pressure of the water is 0.25MPa. , draw bar traction air pressure 0.27MPa;

[0040] The round wire billet is continuously extruded to form a flat copper wire. During extrusion production, the compaction pressure is 40MPa, the tooling is cooled, the temperature is 50°C, the current is controlled at 170A, and the extrusion temperature is maintained at ...

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Abstract

The invention relates to a manufacturing process of enamelled copper strap wires, and particularly relates to a manufacturing method of corona-resistant polyimide film sintered enamelled copper strap wires. The manufacturing method comprises the following steps of: processing a copper conductor into a copper strap wire; making the copper strap wire to a 200-grade polyester-imine / polyamide-imide compound type enamelled copper strap wire; and covering a corona-resistant polyimide film on the enamelled copper strap wire and then heating, baking and sintering the enamelled copper strap wire. The manufacturing method combines an enameling process and a glass-coating process, overcomes the limitation of the conventional process, makes up single performance of the existing process, and well combines the enameling process and the glass-coating process; and the product has high corona resistance strength and reaches a high temperature resistance level.

Description

technical field [0001] The invention relates to a manufacturing process of an enamelled copper flat wire, in particular to a production method of a corona-resistant polyimide film sintered enamelled copper flat wire. Background technique [0002] Enameled wire is used for winding wire of variable frequency motor. But for corona-resistant enamelled copper flat wire, this kind of winding wire requires good insulation strength and good corona resistance. This kind of copper flat wire is especially used in environments requiring high corona resistance, such as thermal power generation, wind power generation, and nuclear submarine motors. [0003] There are also improvements to copper flat wires in the existing patents. For example, the application number is 200920042418.3, and the application date is 2009-6-19. , the technical solution is: a corona-resistant polyimide film sintered copper flat wire, including a copper flat wire and a thin film layer sintered on the surface of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B13/16H01B13/26
Inventor 郑德华
Owner SICHUAN JINRUI ELECTRIC
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