Abstract: Method for making an article from plural resin materials including blocking of injection channels with pairs of abutting plates and separating the plates to unblock a channel or channels to permit sequentially injecting different resin compositions.

Abstract: Upper and lower injection mold halves forming between them successive spaces defining the configuration of parts that are to be injection molded and integrally joined into a compound structure. Movable plate means are transversely disposed between the successive spaces and have an aperture. The plate means initially blocks fluid communication between successive spaces in the mold so that one part can be injection molded, followed by injection molding of the second part after the plate means has been moved so that its aperture allows the injected plastic material of the second part to flow through the aperture and into contact with the molded first part, thereby plastically uniting the two parts into an integral or compound structure.