| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin pulley hardly broken even when a bearing is press-fitted thereto after molding a pulley main body, and having sufficient retaining force. SOLUTION: This resin pulley 1 is constituted by press-fitting a bearing 3 into the pulley main body 2 composed of a phenol resin, and integrating the pulley main body 2 and the bearing 3. The phenol resin has a Charpy impact value of 3.5kJ/m<SP>2</SP>or more. The pulley does not have the rib shape, and a film gate injecting the resin from a pulley center of a side face is used in moulding the pulley. COPYRIGHT: (C)2007,JPO&INPIT |
