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Water Temperature During Annealing of Enameled Wire

Update:17-01-2018
Summary:

The quality of the water in the bath is very important. […]

The quality of the water in the bath is very important. Impurities in the water can cause the enameled wire to become unclean and affect the painting, making it impossible to form a smooth film. Use chlorine in the water should be less than 5mg / l, conductivity less than 50μΩ / cm. Chloride ions attached to the surface of the copper enameled wire corrode the copper wire and the paint film over a period of time and produce black spots on the wire surface inside the paint wire. To ensure quality must be regularly cleaned sink.

Water temperature in the tank is also required. Water temperature is conducive to the occurrence of water vapor on the annealing of copper wire protection, leaving the water tank enameled wire is not easy to bring water, but the wire cooling is not conducive. Although the water temperature has played a cooling effect, but the wire with a lot of water, the paint is not good. Normally, the thick water temperature is lower and the thin water temperature is higher. When the copper wire to leave the water vapor splashed sound, indicating that the water temperature is too high. General thick line control at 50 ~ 60 ℃, midline control at 60 ~ 70 ℃, thin line control at 70 ~ 80 ℃. Thin line due to speed, with serious water problems, should adopt hot air drying.

Copper is easily oxidized at high temperature, copper oxide is very crisp, the film can not be firmly attached to the copper enameled wire, copper oxide film has a catalytic effect of aging, the enamel wire flexibility, thermal shock, heat aging have a negative impact . To copper wire is not oxidized, it is necessary to make the copper wire at high temperature does not come into contact with oxygen in the air, so there is a protective gas. Most of the annealing furnace a water seal, the other open. Annealing furnace water tank has three functions: closed mouth, cooling wire, steam occurs as a protective gas. In the car just because of the steam inside the annealing tube is very small, can not be ruled out in time, you can go back to the tube a small amount of alcohol solution.