APPARATUS FOR PRODUCING A THREE-DIMENSIONAL WORKPIECE WITH IMPROVED GAS FLOW AND MANUFACTURING METHOD OF A THREE-DIMENSIONAL WORKPIECE

• Main Authors: Schwarze, Dieter, Krol, Toni Adam, Wilkes, Jan
• Format: Patent
• Language: English; French; German
• Published: 02.08.2023
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; POWDER METALLURGY; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM; WORKING METALLIC POWDER; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

An apparatus (10) for producing a three-dimensional work piece, the apparatus (10) comprises a process chamber (12) accommodating a carrier (14) for receiving a raw material powder, an irradiation device (16) for selectively irradiating electromagnetic or particle radiation onto the raw material powder on the carrier (14) in order to produce a work piece made of said raw material powder by an additive layer construction method, a first gas inlet (22) for supplying gas to the process chamber (12) and a gas outlet (26) for discharging gas from the process chamber (12), wherein the first gas inlet (22) and the gas outlet (26) are configured and arranged in such a manner that a first gas flow (F1) across the carrier (14) is generated, a transmission element (34) which allows the transmission of the electromagnetic or particle radiation emitted by the irradiation device (16) into the process chamber (12), and a second gas inlet (38) for supplying gas to the process chamber (12), wherein the second gas inlet (38) is configured and arranged in such a manner that a second gas flow (F2) in a direction facing away from the transmission element (34) is generated.