Patent ID: 8590508

Claim:
An injection molding tool for the production of an intake system which is constructed of a plastic based material and is for an internal combustion engine, the injection molding tool for forming apertures for the intake system comprising: two mandrels each including ends, wherein each mandrel is inserted and pulled out respectively from a side of the injection molding tool wherein the ends of the mandrels mutually support one another within the injection molding tool, wherein each mandrel is formed step-shaped, wherein for the apertures formed outwardly towards the ends of the mandrels, the respective mandrel is provided with a bigger diameter than for the apertures that are formed inwardly away from the ends of the mandrels, and wherein the tool is configured to form a plurality of intake pipes with the apertures located between adjacent side walls such that bearings may be located within the intake walls and received by the apertures and wherein a shaft may in turn be supported in the bearings, the diameters represented by each step of a mandrel being further configured to allow for the receipt of throttle flaps arranged in the intake pipes and to be mounted about the shaft, the intake pipes to be positioned in parallel and including the ends, apertures of different diameter to be created by each step of a respective mandrel, the apertures that are located further outwardly towards the ends of the intake pipes to each have a bigger diameter than the adjacent apertures located inwardly away from the ends of the intake pipes.