METHOD FOR MANUFACTURING CARBON FIBER-REINFORCED COMPOSITE MATERIAL SPRING, AND CARBON FIBER-REINFORCED COMPOSITE MATERIAL SPRING MANUFACTURED THEREBY

摘要

A method for manufacturing a carbon fiber-reinforced composite material spring, according to the present invention, may comprise the steps of: forming a first carbon fiber layer by winding, around a mandrel, a carbon fiber prepreg that is gelled by impregnating a carbon fiber with a resin; forming a second carbon fiber layer by winding, on the first carbon fiber layer, a second carbon fiber prepreg of a knitted fabric shape that is gelled by impregnating a carbon fiber with a resin; forming a third carbon fiber layer by winding, on the second carbon fiber layer, a third carbon fiber prepreg of a knitted fabric shape that is gelled by impregnating a carbon fiber with a resin; obtaining a first spring material of a tubular shape by removing the mandrel when the first to third carbon fiber layers are partially cured; injecting the first spring material into a mold having a forming space of a helical shape; curing the first spring material into a third spring material of a helical shape by injecting high pressure air into a hollow of the first spring material inserted into the mold so that the first to third carbon fiber layers are expanded and integrated with each other; separating the cured third spring material of a helical shape from the mold; and producing a finished product of a carbon fiber-reinforced composite material spring by cutting the third spring material of a helical shape by a predetermined length.