What's wrong with copper wire darkening?
Insulation material: insulating paint can be divided into impregnating paint, enameled wire paint, covering paint, silicon steel sheet paint, anti corona paint and other five categories. Among them, impregnating varnish is used as impregnating equipment for motor and electric coil. Varnish can play a insulation system fills in the gap and micropores, and was formed a continuous film impregnated surface, and the coil is bonded into a strong overall, effectively improve the integrity of the insulation system, thermal conductivity, moisture resistance, dielectric strength and mechanical strength of. Secondly, it also plays a role of heat dissipation. If the insulating paint is soaked, the coil after drying can be regarded as a whole, and the heat inside and outside layer can be transmitted easily, so as to play the role of heat distribution. Now, our insulating varnish oil production process, preparation method and formulation patent technical information is still relatively backward, the production and processing of impregnating varnish basically only play the role of short, a long time will appear to fall, the phenomenon of failure.
Technical reasons: before, most of our domestic manufacturers are using universal copper rod, copper content can reach 99.95%, but even if this day, copper still exists in this O. The reason is that copper itself is not oxygen free copper. In the process of processing, the surface of copper will inevitably come into contact with air and appear to be oxidized. Now the introduction of advanced production technology of copper, and developed by the domestic copper production technology, the copper industry are using the oxygen free copper, which undoubtedly has been greatly improved blackening of copper wire. However, due to the processing of copper rods, especially the application of the toughening process and the poor storage conditions of the finished copper wire core, the copper wire itself will be slightly oxidized.
The problem: we are in the process of using copper wire coil, often there will be such a problem - collision friction, flushing slow, large water contact with the coil, the use of waste lubricating oil, causing the conductor surface residue and insulation layer damage caused by oxidation in the subsequent processing of conductor;
