After Enameled Wire is wound into the coil, it usually goes through the impregnation process. The solvent in the impregnating varnish has a swelling effect on the paint film to varying degrees, especially at higher temperatures.
During the use of the impregnated winding, the paint film may be thermally cracked due to heat, so the compatibility between the impregnated paint and enameled wire paint film has a great impact on the service life of motors, electrical appliances and meters.
During use, the winding may contact with various surrounding media, such as refrigerant in refrigeration equipment and various chemical gases in chemical plants. These media have different degrees of corrosion to the paint film, and salt fog can also produce chemical corrosion to enameled wires of electrical products on marine ships. Therefore, the paint film of enameled wires is required to have better chemical stability.
Enameled wires, such as earphones, stereos, speakers, etc. are required, which will cause voltage changes. Enameled wires, such as transformers, chargers, etc. are required. The key to pay-off is to control the tension and pay-off with large capacity. For controlling the tension, it is very important for workers' technology. The purpose of annealing is to heat the conductor hardened due to lattice change during the stretching process of the mould at a certain temperature, to restore the flexibility required by the process after rearrangement of molecular lattice, and to remove the lubricant, oil stain, etc. remaining on the conductor surface during the stretching process, thus facilitating the later painting process and ensuring the quality of enameled wire. The most important thing is to ensure that the enameled wire has appropriate softness and elongation during its use as a winding, and at the same time helps to improve the conductivity.
Painting is the process of coating paint on a metal conductor and forming a uniform paint layer with a certain thickness. Baking refers to entering the oven after the wire is painted, evaporating the solvent in the paint solution, then curing to form a paint film, then painting and baking, thus repeating. Cooling is to use a blower to cool the wire countercurrently through an air pipe and a cooler. Note that the air source must be used after purification so as not to blow impurities and dust onto the surface of enameled wire and stick to the paint film. The purpose of a wire winding is to continuously, tightly and evenly wind enameled wire onto the bobbin.