| 摘要 |
PROBLEM TO BE SOLVED: To provide a balancing weight structure of a fan capable of preventing dropping of balancing weights and achieving optimal balancing. SOLUTION: A space O having a shape the same as that of a fan 1 to be manufactured is defined between a front mold 10 and a rear mold 11 which are laid on each other on front and rear sides of the fan 1 to be manufactured. The fan 1 is formed integrally by filling material in the space O. The balancing weights 9 are provided on the fan 1. The front mold 10 and the rear mold 11 include a first piece 12 and a second piece 13 that communicate with the interior of the space O, can move in the direction of a rotary shaft of the fan 1 to be manufactured and are arranged in opposition to each other. The balancing weights 9 are made of the material filled between the first piece 12 and the second piece 13 and are formed integrally with the fan 1. COPYRIGHT: (C)2008,JPO&INPIT
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