| 摘要 |
PROBLEM TO BE SOLVED: To prevent the falling of a curable resin during and after molding and to enhance strength in circumferential and axial directions by impregnating the roving fibers wound around the outer surface of a mandrel in a hoop direction with a curable resin and impregnating chopped strand fibbers with a high viscosity curable resin to spray these fibers on the mandrel. SOLUTION: Roving fibers 2 are wound around a mandrel 1 in a hoop direction to be impregnated with a curable resin. Subsequently, chopped strand fibers are impregnated with a curable resin having viscosity high than that of this curable resin to be sprayed on the mandrel 1. That is, the roving fibers 2 impregnated with the curable resin with viscosity of 1 poise or less is wound around the outer surface of the mandrel 1 in the hoop direction and, subsequently, chopped strand fibers and the curable resin with viscosity of 5-60 poise are sprayed on the mandrel. As the curable resin, for example, an unsaturated polyester resin or an epoxy resin is designated. |
