Patent ID: 8932421
Filing Date: 2015-01-13
Classification: B29C,B29K,B29L

Abstract:
1. A method of molding a fiber-reinforced plastic hollow part by internal pressure molding, the method comprising: a step of forming a hollow laminate by laminating a reinforcing fiber and a matrix resin on an outer circumference of a hollow resin core preformed from a thermoplastic resin; a step of inserting and positioning a pressurizing bag inside the hollow resin core of the hollow laminate; a step of positioning the hollow laminate inside a mold; a step of integrating the resin and the reinforcing fiber by applying heat while applying pressure inside the pressurizing bag of the hollow laminate positioned within the mold; and a step of removing the pressurizing bag from an integrated molded article, wherein the step of laminating the reinforcing fiber on the outer circumference of the hollow resin core is performed by alternately laminating, by braiding, a braiding yarn layer whose braiding angle relative to a longitudinal axis of the hollow resin core is 0 degrees and a braiding yarn layer whose braiding angle relative to the longitudinal axis of the hollow resin core is θ degrees (excluding 0 degrees), and laminating a matrix resin film between the braiding yarn layer whose braiding angle relative to the axis is 0 degrees and the braiding yarn layer whose braiding angle relative to the axis is θ degrees.