| 摘要 |
PURPOSE:To continuously mold a fiber-reinforced plastic tube (FRP) free from interlayer peeling and with adequate physical strength by trimming the appearance of an FRP layer using a shaping ring device and only curing the surface layer of said layer. CONSTITUTION:If a reinforced PVC tube is passed through a shaping device 9, a residual resin on the reinforced PVC tube is removed by the elasticity of a rubber plate 48 because a shaping aperture 49 is smaller than the outside diameter of said tube. Consequently, the uneven surface of a wound glass roving is smoothed and the external shape of the reinforced PVD tube is adjusted to a circular contour. Next, said tube adjusted to a circular profile with the shaping ring device 9 is permitted to pass through an ultraviolet ray curing furnace 10a, 10b, 10c. Then after curing the surface, the tube is transferred to a far infra-red ray curing furnace 11 and a far infra-red ray heater 51, 51 is installed all along the axial direction of the reinforced PVC tube and both above/below the tube. Thus, the interior of an unsaturated polyester resin layer is thermally cured. |
