Method for forming a rod-like molding

Claim 1

In a method of forming a fiber reinforced synthetic resin rod-like molding obtained by forming a core portion having at least in the outer portion thereof a reinforcing fiber bundle impregnated with non-hardened thermosetting resin, coating said core portion with a molten thermoplastic resin, cooling and solidifying said thermoplastic resin to form a semimolding with said thermosetting resin remaining non-hardened, and thereafter hardening said thermosetting resin, the improvement wherein said hardening comprises the steps of: introducing said semimolding into a hardening tub; supplying a thermal medium at a temperature in the vicinity of the molting point of said thermoplastic resin into said hardening tub, thereby softening said thermoplastic resin and hardening said thermosetting resin of said core portion; maintaining said thermal medium at an elevated pressure and thereby pressing together at outer surface portion of said core portion and an inner surface portion of said thermoplastic resin layer while in respective semifluid states to achieve firm and integral adhesion therebetween due to an anchor effect; and thereafter again cooling and solidifying said thermoplastic resin.