| 摘要 |
<p>An ABS resin having a heat-deformation temperature of 106 °C is used as a PS thermoplastic resin and is extrusion molded to obtain a core. Seven cores are disposed on the right and left sides thereof and are hauled off by a haul-off machine. Reinforcing long fibers are impregnated with an unsaturated polyester resin, passed through a dispersing guide and a drawing nozzle to form a fiber-reinforced composite hollow structure having legs made of FRP by drawing. A final drawing nozzle is disposed through a cooling jacket in a cross-head die. After the impregnated fibers are passed through this nozzle, the outer periphery is heated and covered with the ABS resin. Next, the fibers are cooled ans sized by paired rollers, one pair being arranged vertically and the other being laterally. Then the covering ABS resin is cured in a hot water curing bath at 95 °C. The surface of the ABS resin is roughened for slip prevention. Protective caps made of a thermoplastic resin are fitted to the end portions of the cores. Each cap comprises a sheet-like portion having substantially the same planar shape as the sectional shape of the end portions of the composite hollow structure, and a pawl-like protruding portion protruding from the sheet-like portion and expanding towards the distal end. The protruding portion is split in a circumferential direction. An apparatus for producing such a composite hollow structure comprises pairs of sizing rollers which are disposed at least vertically. The sizing rollers are rotatable, heat-resistant, and disposed in the haul-off direction. The temperatures of the rollers gradually lowers from the upstream side toward the downstream side.</p> |
