Method for manufacturing electromagnetic wire

Abstract

The invention discloses a method for manufacturing an electromagnetic wire, which mainly comprises the following steps: cleaning, drying, film coating, roasting and curing a pretreated metal wire into the electromagnetic wire, wherein the step of film coating adopts a triboelectric charging powder coating method to coat the metal wire; and the step of roasting and curing adopts an infrared curing technology to cure a coating film. The method for manufacturing an electromagnetic wire cannot do harm to the environment, and the thickness of the coating film is more uniform without generating mass points. Meanwhile, due to the adoption of the infrared curing technology, temperature is risen from the interior of the metal wire to transfer heat outside so as to melt a powder coating and be beneficial to exhausting air and small molecular compounds in the coating film before film forming, improving the electrical insulating property, the appearance and the leveling of the coating film and avoiding generating pin holes, and moreover, the method has high curing speed, greatly improves the production efficiency and saves energy.

Description

technical field [0001] The invention relates to a manufacturing method of an electromagnetic wire. Background technique [0002] Electromagnetic wire is one of the indispensable important materials for electrical products, mainly used in products such as welding machines, transformers, motors and electromagnets. [0003] At present, the electromagnetic wire is generally made by the following two methods: [0004] The first method is the concentrated sulfuric acid oxidation method of aluminum wire, and its main production process is: aluminum rod → wire drawing (or extrusion) into bare wire → pretreatment (or degreasing) → cleaning → drying → concentrated sulfuric acid oxidation into insulation Film→cleaning→drying→finished product. [0005] The second method is the dipping paint method, and its main production process is: aluminum rod (or copper rod) → wire drawing (or extrusion) into bare wire → pretreatment (or degreasing) → cleaning → drying → multiple dipping of paint ...

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Problems solved by technology

[0006] Among them, the biggest disadvantage of the first method is that a large amount of concentrated sulfuric acid is used in the process of manufacturing the oxide film, and sulfuric acid vapor is volatilized in the production, which not only causes serious corrosion and pollution to the environment, but also causes serious damage to the human respiratory tract. Water quality causes pollution; in addition, the processing speed is slow and labor production efficiency is relatively low

The biggest disadvantage of the second method is that the content of organic solvents in the paint used is as high as 60%-70%, and all of them are discharged into the atmosphere during the painting process, which not only causes air pollution, but also causes a lot of waste of resources. It meets the requirements of national environmental protection and resource conservation, and its toxic organic solvents are also harmful to the health of operators. At the same time, organic solvents, as flammable and explosive products, also have potential hidden dangers to safe production

[0007] In order to overcome the shortcomings of the above two coating methods, a high-voltage electrostatic powder coating method and corresponding powder coatings have been developed. The thickness of the coating film between the metal wires is quite different and uneven, the coating film is prone to particles, and the baking and curing speed is slow

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