INJECTION MOLDING METHOD AND INJECTION MOLDING DEVICE

摘要

Provided is an injection molding method for a resin material with which a stable reinforcing fiber content can be obtained. This injection molding method, which is provided with a heating cylinder (201) on the front end of which a discharge nozzle (203) is formed, a single axis screw (10) provided so as to be rotatable inside the heating cylinder (201), and a fiber-supplying device (213) for filling reinforcing fiber (F) into the heating cylinder (201), and which performs injection molding while supplying the reinforcing fiber (F) and the resin starting material separately and supplying the reinforcing fiber (F) on the front side of the resin starting material. The method is characterized in that: the method is provided with a plasticization process for obtaining a specified amount of a kneaded product by retracting the screw (10) while rotating in the normal direction to melt the resin starting material and knead reinforcing fiber (F) into the melted resin starting material, and an injection process for discharging the kneaded product from the discharge nozzle (203) by advancing the screw (10); and reinforcing fiber (F) is supplied into the heating cylinder (201) in the injection process.