metallic material and to heat the metallic material to a temperature above solidus extending approximately diagonally to the volume of the processing device 12 c is the shaft of an agitating device 126 with agitating elements 136 for thoroughly mixing the metallic material in the processing device 12 c the processing device 12 c is heated by a heating device 30 c which is arranged at the bottom zone and sidewalls of the processing device 12 c arranged in the bottom zone of the processing device 12 c is an opening 13 for discharge of prepared metallic material via a connection line 130 to the storage container 18 in which the agitating device 36 is accommodated to reduce forming dendritic structures in the non limiting example of fig6 the shaft of the agitating device 126 extends into and through the connection line 130 and supports helical projections 128 along the portion traversing the connection line 130 so as to provide a defined supply of prepared free flowing metallic material to the storage container 18 at the same time the helical projections 128 prevent a transfer of solid not yet processed metallic material parts from the processing unit 12 c into the storage container 18 in addition these functional elements of the agitating device.