In accordance with one or more embodiments herein, an arrangement 200 for additive manufacturing by selective fusion of layers of a three-dimensional product from a powder bed comprising successively formed powder layers 240 is provided. The arrangement 200 comprises a heating element 350 having a powder layer facing surface 355, arranged in a powder layer heating position above a powder layer 240, in such a way that heat radiation emitted from said heating element 350 heats at least a part of the powder layer 240 before the selective fusion of a layer of the three-dimensional product from the powder layer 240.
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
A metal 3D printer, a cathode holder system, a carrier for an electron emitter, and an electron source piece with a thermal break in a mechanical interface. The metal 3D printer has an electron gun adapted to direct an electron beam generated by a back heated electron emitter of a cathode arrangement onto a metal material via an anode arrangement. The metal 3D printer comprises: an electron source piece, comprising the electron emitter attached to a carrier such that the carrier covers the side surface of the electron emitter adjoining the emitting surface; a cathode holder system comprising one or more cathode holder system members adapted to hold the electron source piece in a position in relation to an anode arrangement; and a first thermal break in a first mechanical interface to mate an emitter holder of the cathode holder system with the electron source piece.
B22F 12/41 - Radiation means characterised by the type, e.g. laser or electron beam
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
The present invention relates to an apparatus and a method for an electron beam system for manufacturing a three-dimensional object by fusing successive layers of powder, said system having at least one lens for reshaping of said electron beam, an electron source and a powder bed, said method comprising the step: blocking a selected cross section of said electron beam for controlling the electron beam power. By interference between the electron beam and a beam blocking part a portion of the electron beam is prevented from reaching the powder bed.
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B29C 64/273 - Arrangements for irradiation using electron beams [EB] frequency modulated
patents
