integration device which then thereby forms a main mold could be post produced during integration the individual parts produced according to the invention can also be subjected to a quality test individually before their integration so that potential rejects also remain more limited according to the invention the joined rotor blade could also be completely hardened in a separate temper chamber according to the invention it can also be provided in particular to prefabricate belt bar groups such a group can be integrated into the respective half shell in the suction side half shell and in the pressure side half shell and during connection of the two half shells with each other the two groups are then also preferably interconnected into a box shape according to the invention an integrated half shell can be developed without thick layer adhesion the belt bar group according to the invention is preferably produced such that each integral component is developed with a belt and a bar for this a mainly l shaped mold is preferably needed one side of which is removed from the blade shell surface and receives the belt layers and the other side of which presents the mainly even bar geometry the manufacturing mold is preferably swivel mounted so that either the belt side is horizontal or the bar site is horizontal or an intermediate position is assumed which is particularly advantageous for the insertion and or infusioning moreover the manufacturing mold could be designed separable in order to facilitate removal from the mold the belt layers are preferably first inserted into the manufacturing mold and immobilized for example with lattice tape the layers for the bar are then inserted and overlapped.