| 摘要 |
PROBLEM TO BE SOLVED: To arrange reinforcing fiber parallel to an axis of a pipe in the case of shaping a reinforced plastic pipe by a sheet-winding shaping method. SOLUTION: The shaping method of the reinforced plastic pipe by the sheet-winding shaping method comprises helically winding a woven fabric of reinforcing fiber wound in a roll shape around a core material, impregnating the woven fabric with a resin and curing it to shape it into a pipe wherein the reinforcing fiber of the woven fabric wound in the roll shape is arranged obliquely to the widthwise direction of the roll, and the helical pitch angle of the wind is same as the angle between the widthwise direction of the roll and the obliquely arranged reinforcing fiber. In this way the reinforcing fiber after winding the woven fabric around the core material becomes parallel to the direction of the axis of the reinforced plastic pipe. Since the reinforcing fiber is parallel to the direction of the axis of the reinforced plastic pipe, it is possible to increase the strength and stiffness. COPYRIGHT: (C)2007,JPO&INPIT |
