Method and device for applying at least one material, extruder, 3D print head, 3D printer, machine tool and control device

A device for depositing at least one material onto a substrate or a workpiece via a fused deposition modeling method, the device comprising:

• a main body including at least a first access channel, a second access channel and an external outlet, the first access channel receiving a first material and the second access channel receiving a second material, the first and second access channels extending at one part parallel to and spaced apart from a central axis of the main body and extending at another part at an angle to the central axis of the main body to end in the outlet of the main body;
• a feed system for the first material to supply the first access channel;
• and
• a further feed system for the second material to supply the second access channel;
• wherein an inside face of at least one of (i) the outlet, (ii) the workpiece and (iii) the substrate is rotatable about an axis of rotation which extends through the outlet;
• wherein a combination of the first material and the second material is provided upon the at least first material and second material being discharged through the outlet;
• wherein the first and second access channels converge and merge together and form the external outlet of the device;
• wherein the main body has a sub-body which is rotatable with respect to the main body;
• and
• wherein the first and second access channels extend through the sub-body.