| 摘要 |
PROBLEM TO BE SOLVED: To markedly improve the yield in a moisture-resistant treatment of a coil by a method wherein a sealing material which seals up the winding is cured by heating to stop up the air vent hole of a bobbin when the wire of a coil is subjected to a moisture-resistant treatment. SOLUTION: A wire 31 is wound on a bobbin 10, a sealing tape 41 is mounted on the outer circumference of the wire 31, and a flange 12 is filled up with sealing material 42 at a prescribed position. Thereafter, all the bobbin 10 with the wire 31 is heated to cure the sealing tape 41 and the sealing material 42. At this point, air contained in the wire 31 is discharged out through an air vent hole 13, and the sealing tape 41 and the sealing material 42 are prevented from being deformed, and voids are restrained from occurring in the sealing material 42. After the sealing tape 41 and the sealing material 42 are cured by heating, the air vent hole 13 is stopped up through a heater, the wire 31 that contains a lead wire 31a and others is shut off from the outside by the bobbin 10, the sealing tape 41, and the sealing material 42. By this setup, a defective product is prevented from being formed, and a product can be markedly improved in yield.
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