METHOD OF MANUFACTURING ENAMELED WIRE

PROBLEM TO BE SOLVED: To provide a method of manufacturing an enameled wire capable of achieving improvement in voltage withstanding life to the surge voltage of an inverter and thermal deterioration resistance even when suppressing to low the weight part of inorganic filling material. SOLUTION: In the manufacturing method of a coating formed enameled wire 10, an enamel resin and a flat and fine inorganic filling material are put in an agitating container with an agitating arm and a preliminary mixed enamel coating material is formed, then, the enamel coating material is put through the gap between the rolls of three rolls and uniformly blended by a high shearing force caused by the difference of rotation speed and rotation direction and a resin tub in which the enamel coating material is filled is prepared. A conductor 11 is put through the resin tub to adhere the enamel coating material, and by passing through the dice of a prescribed dimension, shearing force is applied to be oriented to the fine inorganic particles and the adhesion amount of the enamel coating material is adjusted. Thereafter, the conductor is heated to bake the enamel coating material on the surface of the conductor, and this process is repeated for a plurality of times to form the coating. COPYRIGHT: (C)2009,JPO&INPIT