Patent ID: 8052910

Claim:
A method for continuously molding composite material prepreg having stepwise sectional thickness, in which composite material prepreg obtained by impregnating a thermosetting resin into a carbon fiber is intermittently supplied in the longitudinal direction and then passed through a mold and a curing oven, the method comprising the steps of: preparing a molding material obtained by laminating, on a carrier film, composite material prepreg and a prepreg peel ply that is arranged continuously to the composite material prepreg in such a manner that a space, comprised within a range of 0.5 to 1 mm, is formed between the composite material prepreg and each end of the prepreg peel ply; supplying the molding material on the surface of a multilayered composite material prepreg laminate, which is then passed through the mold and the curing oven; and removing the carrier film from the surface of the molded laminate, then peeling and removing the prepreg peel ply from the surface of the molded laminate, wherein the prepreg peel ply is obtained by impregnating a resin into a fabric of polyester fiber or nylon fiber, the prepreg peel ply has a substantially equal thickness to that of the composite material prepreg, and the resin impregnated into the fabric is the same resin as that in the composite material prepreg.