HOLLOW COMPOSITE STRUCTURE FORMED BY INCREASING PRESSURE RESIN TRANSFER MOLDING, AND METHOD FOR MANUFACTURING SAME

摘要

The present invention relates to a hollow structure, such as an electric pole or a wind turbine tower, which is made of a fiber composite impregnated with a resin. When a hollow composite structure according to the present invention is formed, pressure is gradually increased through a flexible mold over the entire area of the inner circumferential surface of a resin injected into the mold in which a reinforcing fiber is disposed. Also, the mold is rotated to rearrange the reinforcing fibers so that the resin is smoothly impregnated. In the composite structure according to the present invention, the flexible mold may be integrally welded or attached to the inner surface of the composite structure to secure a smooth inner surface, and also, penetration of moisture may be prevented by the inner surface to improve product durability.