| 摘要 |
PURPOSE:To provide the manufacturing method of a homogeneous fiber-reinforced synthetic resin (FRP) tube, in which the curing of resin is permitted to be effected uniformly, by a method wherein sockets are engaged with the outer peripheral surface of a mandrel to form a tubular by winding thermosetting resin impregnated fibers on the outer peripheral surface thereof and the tubular body is heated externally to cure it while heating the mandrel. CONSTITUTION:Metallic sockets 2 are engaged with the outer peripheral surface of a mandrel 1 and spacers 3 for regulating the difference of steps are fitted between the metallic sockets 2. Adhesive agent is coated on respective metallic sockets 2 and respective spacers 3 while thermosetting resin impregnated fibers are wound around them to form uncured tubular bodies 5. Steam T is introduced into the mandrel 1 and the tubular bodies 5 are inserted into a curing furnace, thereafter, the mandrel 1 is heated by the steam T simultaneously with the heating of the tubular bodies 5, which is effected from outside under the same temperature. The tubular bodies 5 and the adhesive agent are heated to cure them and connect the tubular bodies 5, the sockets 2 and the spacers 3 with each other. After cure, the mandrel 1 is extracted and three pieces of FRP tubes are obtained in areas (a1), (a2), (a3). A temperature difference is not generated in the tubular bodies, therefore, curing may be effected uniformly and the homogeneous FRP tube, uniform in the strength thereof, may be obtained. |
