Abstract: In an embodiment a 3D printer for additive manufacturing of a multilayer component includes a work surface, at least two movable dispensers configured to coat the work surface with one of at least two different raw materials in each case, wherein at least a part of the respective raw material is addable to the component as a layer in a manufacturing step, and at least two movable recovering devices configured to selectively recover the respective raw material which is not consumed when a layer is added to the component and return the recovered raw material to a respective associated dispenser.

Abstract: The invention comprises a 3D printer for additively manufacturing a multilayer component. The 3D printer comprises at least two separate dispensers (2) coating a conveyor belt (3) with respectively different raw material, a manufacturing unit in which at least part of the raw material is added to the component (8) as a new layer, at least two separate recovery devices (12) for selectively recovering the respectively different raw material, which is not consumed when a layer is added to the component (8), and returning the raw material to the respective associated dispenser (2) and conveyor belt (3) which transports the raw material from the dispenser (2) to the manufacturing unit and further to the recovery device (12) in the lateral direction.

Abstract: A method in which a three-dimensional component is produced and is provided on its component surface with a machine-readable code, wherein the code is produced in one part with the component and has a plurality of three-dimensional code elements, which represent the coded data in binary form on the basis of raised regions and non-raised regions in relation to a reference plane. A method in which a three-dimensional component is produced and is provided on its component surface with a machine-readable code, wherein the code is produced in one part with the component and has a plurality of three-dimensional code elements which represent the coded data in binary form on the basis of recessed regions and non-recessed regions in relation to a reference plane. A component includes such a code.