| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a mold coil which is small, excellent in productivity, and has high bonding reliability between an end of winding wire and an external electrode. SOLUTION: An air-core coil is sealed by magnetic mold resin formed by kneading magnetic powder and thermosetting resin using a plastic molding method. A molding die having a plurality of dies for forming a cavity is used. Folding parts are formed at both ends of the air-core coil using a wire rod having a flat surface. The air-core coil is arranged in the cavity so that at least a part of the flat surfaces at both ends of the air-core coil pressurizes the bottom part or the side part in the molding die by elasticity to be generated from the folding parts. The molding die is preheated at equal to or higher than temperature for softening the magnetic mold resin, the magnetic mold resin is filled into the cavity to bury the air-core coil. The magnetic mold resin is thermally cured to be made into a compact, and an electrode layer is formed in the molded article so as to be connected to the end of the air-core coil. COPYRIGHT: (C)2010,JPO&INPIT |
