Production Process Of Magnet Wire: from wire laying to wire taking up

The production process of magnet wire mainly includes: pay-off, annealing, painting, baking, cooling and take-up.
The conductor part of the enamel insulated wire is generally annealed undoped pure metal, such as copper, aluminum, copper alloy, gold, silver, nickel, stainless steel and other materials are also used in some occasions. Polyester, polyester, polyesterimide, polyimide and other polymers are often used as insulating film materials for winding metal wires of electromagnetic coils.
The conductor shape of the winding wire include round wire, flat wire, tape, foil, etc. At present, most of them use copper wire, like polyurethane enameled copper wire, and some use aluminum wire. In order to improve the tensile strength of aluminum winding wire, high conductivity and high strength aluminum alloy can be used.

Pay-off is to pay off the wire on a normal operating enameling machine. In order to reduce the operator’s energy and physical strength, a large-capacity pay-off method is usually adopted. The key to pay-off is to control the tension, which should be uniform and appropriate. At the same time, the pay-off devices for different specifications of the wire are also different. Large-sized and large-capacity spools generally use radial rotary pay-offs; medium-sized wires generally use over-end or brush-type pay-offs; fine-sized wires generally use wool Brush or double taper sleeve pay-off.

Annealing is carried out after pay-off. The purpose of copper wire annealing process is to disrupt the molecular lattice structure. So that the hardened wire during the pay-off process can be heated at a certain temperature to restore the softness required by the process. At the same time remove lubricants and oil stains during the stretching process, to ensure the quality of magnet wire.

After annealing, painting is carried out. Painting is the process of applying paint to metal conductors to form a uniform paint layer of a certain thickness. Different coating methods and different wire specifications have different requirements for the viscosity of the paint.

Generally, the magnet wire has to go through multiple coating and baking processes. So that the solvent can be fully evaporated, the coating resin can be fully reacted, and a good paint film can be formed.

Baking, like painting, is also a cyclical process. First, the solvent in the paint is evaporated, then cured to form a paint film, and then painted and baked.
In the baking process, pollutants will be generated, and the furnace must be removed in time. Generally, a catalytic combustion hot air circulation furnace is used. At the same time, the amount of waste can be neither too large nor too small. Ensure safe production and product quality without causing a large amount of heat loss.

The baked magnet wire has a high temperature, the paint film is very soft, and the strength is very small. If it is not cooled in time, the paint film of the guide wheel will be damaged, which will affect the quality of the magnet wire.

The next step of cooling is to take up the wire. The purpose of the take-up is to wind the magnet wire on the spool continuously, tightly and evenly. It is required that the wire take-up machine has a smooth transmission, low noise, proper tension and regular wire arrangement.

If you have any questions, please contact us for free. LP HUAYANG Industry CO.,LTD specializes in the production and export of electromagnetic wire for 30 years.