MANUFACTURE OF NON-CIRCULAR FIBER-REINFORCED PLASTIC PIPE AND MANUFACTURING DEVICE THEREOF

摘要

PROBLEM TO BE SOLVED: To obtain a method for manufacturing a non-circular FRP pipe which is designed for manufacturing a non-circular FRP pipe with an arbitrarily selected homogenous wall thickness by pressing a mixture of cut glass roving and a resin composition against the inner face of molding frame, then defoaming the mixture and repeatedly performing the constantly displaced rotation of the molding frame. SOLUTION: A non-circular fiber-reinforced plastic pipe is composed of glass roving 10 cut by a roller 4e with a cutting blade through the driving of a receiving roller 4d. The cutting length of the glass roving 10 can be changed by the interblade pitch of the roller with the cutting blade. On the other hand, a resin 8a and a curing agent 9a are supplied to a supply nozzle by a resin supply pump 8 and a curing agent supply pump 9a to manufacture a resin composition 11. This resin composition 11 is mixed with the cut glass roving 10a, and this mixture is scattered over the inner face of a hollow non-circular molding frame 1. The mixture of the supplied glass roving 10a and the resin composition 11 is defoamed by a defoaming roll which is rotated in contact with the inner face of the hollow non-circular molding frame after the defoaming roll is impregnated with the mixture.