| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing an air core coil capable of reducing the number of parts and shortening the manufacturing time.SOLUTION: A coiled body is formed by winding a fusion magnet wire around the outer circumferential surface of a flexible tube 4 held in a straight line with a winding machine, the flexible tube on which the coil body is formed is bent into a shape retaining groove 71 of a jig 7 and fitted therein, and after putting the flexible tube in a constant temperature bath at the melting temperature of the fusion bonded layer of the fused magnet wire for a predetermined time, it is cooled at normal temperature to solidify the fusion layer again. The fusion bonded layers of the fused magnet wires that were in contact with each other were melted and united. A constraining layer for constraining a magnet wire of a curved shape as it is wound is formed, and by pulling out the flexible tube 4, the coreless coil 1 fixed in a curved shape is formed.SELECTED DRAWING: Figure 5 |
