A plastic injection device having a transfer system for manufacturing molded parts of plastic comprising: - a mold which can be opened via a mold separating surface, - a first injection station formed in the mold, - a second injection station formed in the mold, - a plurality of mold bars which are compatible with both the first injection station as well as with the second injection station, each of which can be inserted in the first injection and in the second injection station respectively in the region of the mold chamber separating surfaces, wherein - the first injection station embeds cavities which are embodied with negative forms of pre-molded parts with a first injection component, - the mold bar is embodied in such a manner that said mold bar jointly with the adhering pre-molded parts can be brought into the second injection station, wherein the second injection station embeds cavities which are embodied with negative forms of second workpiece sections with a second injection component, - the transfer system is embodied in such a manner that through this transfer system a mold bar loaded with pre-molded parts within the scope of an injection step accomplished via a first injection station can be initially brought into an intermediate region which is located outside the mold and instead of the re-molded parts just manufactured a mold bar provided with pre-molded parts within the scope of an earlier injection step preceding the mentioned injection step is brought into the second injection station, - wherein the transfer system is embodied in such a manner that through said transfer system, picking-up of a mold bar loaded with pre-molded parts in the first injection station and a mold bar equipped with further structures in the second injection station takes place, characterized in that - the first injection station is located in vertical direction below the second injection station or in horizontal direction adjacent the second injection station. - a mold which can be opened via a mold separating surface, - a first injection station formed in the mold, - a second injection station formed in the mold, - a plurality of mold bars which are compatible with both the first injection station as well as with the second injection station, each of which can be inserted in the first injection and in the second injection station respectively in the region of the mold chamber separating surfaces, wherein - the first injection station embeds cavities which are embodied with negative forms of pre-molded parts with a first injection component, - the mold bar is embodied in such a manner that said mold bar jointly with the adhering pre-molded parts can be brought into the second injection station, wherein the second injection station embeds cavities which are embodied with negative forms of second workpiece sections with a second injection component, - the transfer system is embodied in such a manner that through this transfer system a mold bar loaded with pre-molded parts within the scope of an injection step accomplished via a first injection station can be initially brought into an intermediate region which is located outside the mold and instead of the re-molded parts just manufactured a mold bar provided with pre-molded parts within the scope of an earlier injection step preceding the mentioned injection step is brought into the second injection station, - wherein the transfer system is embodied in such a manner that through said transfer system, picking-up of a mold bar loaded with pre-molded parts in the first injection station and a mold bar equipped with further structures in the second injection station takes place, characterized in that - the first injection station is located in vertical direction below the second injection station or in horizontal direction adjacent the second injection station.