METHOD FOR CORRECTING SHAFT RUNOUT OF SYNTHETIC RESIN MOLDED BODY WITH SHAFT AND DEVICE FOR CORRECTING SHAFT RUNOUT

摘要

PROBLEM TO BE SOLVED: To solve the problem wherein, in a fan of an axial-flow fan motor of office automation equipment, an electric fan, and a compact general industrial machine, a bowl-shaped part having the recessed inner side and a plurality of impeller vanes disposed around the bowl-shaped part are made of a synthetic resin, and a metal-made rotating shaft is integrally molded at the center of the bowl-shape part, but the rotating shaft is inclined due to the contraction of the synthetic resin, and the molded body is produced in a state of the shaft runout.;SOLUTION: A device for correcting shaft runout includes a high-frequency induction coil, a high-frequency induction heating means for high-frequency induction heating the shaft of a synthetic resin molded body by energizing the high-frequency induction coil, and a correction tool for restraining the synthetic resin molded body with the shaft. The high-frequency induction coil is disposed in the vicinity of the surface of the synthetic resin molded body, the shaft of the synthetic resin molded body is high-frequency induction heated using the high-frequency induction coil with the high-frequency induction heating means, a shaft holding part for holding the shaft of the synthetic resin molded body with the shaft is softened, the inclination of the shaft is corrected by restraining the synthetic resin molded body with the shaft with the correction tool in such a state that the shaft holding part is softened, and the synthetic resin molded body with the shaft having the corrected shaft inclination is obtained.;COPYRIGHT: (C)2011,JPO&INPIT