Device for the manufacturing of a main component consisting of a first plastic material and a core component consisting of a second plastic material , which is surrounded by the main component , comprising: - an injection moulding tool , comprising at least two tool elements , wherein at least one moulding tool cavity can be formed or is formed by the at least two tool elements in a closed position of the injection mould tool , - a cold runner structure , through which at least one of the molten plastic materials can flow and comprising at least one cold runner flowing into the tool cavity at least in the closed position of the injection mould tool , - a hot runner structure comprising a hot runner flowing into the at least one cold runner , at least in the closed position of the injection mould tool , through which a molten plastic material , in particular a second plastic material , can run to form the core component of the plastic element to be manufactured, one needle valve arranged on the hot runner structure , wherein the needle valve comprises a needle valve element arranged to be movable, in between a first operating position in which the influx of molten plastic material from the at least one hot runner into the at least one cold runner is not possible and a second operating position in which an influx of molten plastic material from the at least one hot runner into the at least one cold runner is possible, characterised in that the at least one cold runner is embodied to extend completely along a separating level of the injection mould tool , wherein the at least one cold runner extends along the separation level of the injection mould tool from the tool cavity up to a rim of the injection mould tool . - an injection moulding tool , comprising at least two tool elements , wherein at least one moulding tool cavity can be formed or is formed by the at least two tool elements in a closed position of the injection mould tool , - a cold runner structure , through which at least one of the molten plastic materials can flow and comprising at least one cold runner flowing into the tool cavity at least in the closed position of the injection mould tool , - a hot runner structure comprising a hot runner flowing into the at least one cold runner , at least in the closed position of the injection mould tool , through which a molten plastic material , in particular a second plastic material , can run to form the core component of the plastic element to be manufactured, one needle valve arranged on the hot runner structure , wherein the needle valve comprises a needle valve element arranged to be movable, in between a first operating position in which the influx of molten plastic material from the at least one hot runner into the at least one cold runner is not possible and a second operating position in which an influx of molten plastic material from the at least one hot runner into the at least one cold runner is possible, characterised in that the at least one cold runner is embodied to extend completely along a separating level of the injection mould tool , wherein the at least one cold runner extends along the separation level of the injection mould tool from the tool cavity up to a rim of the injection mould tool . <EOS>