| 摘要 |
PURPOSE:To fix a gear body firmly to a shaft by molding under compression the gear body made of an ethylene tetrafluoride resin so as to enclose a ring body stuck to a metal shaft. CONSTITUTION:A ring body 2 is stuck to a shaft 1 by welding, etc., thereby the ring body 2 is fixed to the shaft 1 with such a sufficient strength that the ring body 2 will not be rotated when a rotating force is applied to a gear. When molding a gear body 3 under compression, the center of the shaft 1 with the ring body 2 stuck on it is arranged in a mold for molding under compression, then an ethylene tetrafluoride resin is filled in the mold and is molded under compression to make up the gear body 3, thereby the gear body can be firmly fixed to the shaft. |
