| 摘要 |
PURPOSE:To mold a tubular body having a different diameter part formed to the inner surface thereof by constituting a mandrel of the body part of a mandrel core body integrally having shaft parts on both end sides thereof and the divided sleeve applied to the outer periphery of the body part of the mandrel core body and divided into a plurality of sections in its circumferential direction and having a recessed part formed thereto in its peripheral direction. CONSTITUTION:A divided sleeve 5 has recessed parts 7 provided to the outer peripheral part thereof at a definite interval in its peripheral direction and is divided in its circumferential direction to be formed, for example, from segments 5a - 5e and one segment 5a among them is easily pulled out in the radius direction of the sleeve. The sleeve 5 is assembled on the outer periphery of the body part 2 of a mandrel and rings 8 fitted with pins are externally fitted to both ends of the body part 2 from both shafts 1 of the mandrel and the mandrel is incorporated in an FW apparatus and a reinforcing fiber impregnated with a resin is wound around the mandrel to form a winding laminated part consisting of the first, second, third and fourth layers 10, 11, 12, 13. The resin is cured under heating and the molded body is cut at the position of one ring 8 fitted with the pins and a pulling-out mechanism is connected to the notched part 4 of the shaft 1 to pull out the mandrel. The segment 5a of the sleeve 5 is drawn out in the radius direction and the remaining segments are taken out. The molded body is cut at the position of the ring 8 fitted with pins on the other end side thereof to form an FW roll 6 having protruding ribs 6a. |
