JPS6430735A - Method for forming reinforced resin tubular body - Google Patents

Abstract

PURPOSE:To form a reinforced resin tubular body, the surface condition of which is favorable in smoothness and has no dent due to bubble, by a method wherein the outer peripheral-surface of a fiber reinforced synthetic resin layer is deaerated by swelling out its portions, each of which abuts against a molding surface on the central part side, further than its portions, each of which abuts against a molding surface on the split and joint part side. CONSTITUTION:A fiber reinforced synthetic resin layer 5 is formed by winding fiber reinforced synthetic resin material, which is produced by impregnating glass roving and glass cloth tapes with unsaturated polyester resin, round the outer peripheral surface of an inner mold 1 by rotating the inner mold 1. The resultant synthetic resin layer 5 is a nearly square tube having an outer surface, each corner C of which is slightly rounded and each side of which swells out in a circular arc at the central part B side from the corners C. Under the state that spacers 3... are mounted on the peripheries of both the end parts of the inner mold 1, and an upper mold 21 and a lower mold 22 are arranged so as to oppose the respective molding surfaces of said molds 10 each other and guide pins 31 and 31 are inserted in guide holes 25, the molds 21 and 22 are closed so as to compress the resin layer 5 until the molds 21 and 22 abut against the spacers 3 and 3 in order to discharge bubbles generating on the surface of the synthetic resin layer 5 to the split and joint part side. In succession, side molds 23 and 24 are arranged at the right and left of the inner mold 1 so as to oppose each other and compress the synthetic resin layer 5 in the same manner as the upper mold and the lower mold and finally the layer 5 is hardened.