| 摘要 |
PURPOSE:To obtain the rotary body for the volume type flowmeter having bearing function and outer surface part of large strength, by coupling a resin molding body including solid lubricant into a hole in a resin molding body including a reinforcing material, thereafter compressing and molding them by a metal mold. CONSTITUTION:A hollow cylindrical preparatory molding body 1 is formed by molding the mixture wherein phenol resin powder and graphite powder for the solid lubricant are mixed at a specified rate. A hollow cylindrical preparatory molding body 4 is formed by molding the mixture wherein phenol resin powder and reinforcing glass powder are mixed at a specified rate. A body to be molded 8, wherein the preparatory molding body 1 is coupled into the preparatory molding body 4, is placed in the metal mold 12, which comprises an upper mold 9, a lower mold 10, and a main body 11 having gear forming convex parts on an inner surface 13. The body 8 is compressed and molded under a specified temperature and pressure. When the rotary body for the flowmeter is formed in this way, the rotary body for the volume type flowmeter, wherein the bearing function at the inner surface part is excellent and the mechanical strength of the outer surface part is large, can be manufactured. |
