PROCESS FOR ADDITIVE MANUFACTURING A THREE-DIMENSIONAL WORKPIECE FROM A MELT

• Main Authors: VOEHRINGER, Peter, MAIER, Eberhard, SCHWEIZER, Benjamin, BLEHER, Roland
• Format: Patent
• Language: English; French; German
• Published: 09.08.2023
• 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; CASTING; CORRECTION OF TYPOGRAPHICAL ERRORS; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS; WORKING METALLIC POWDER

The invention relates to a method for the rapid manufacture of a three-dimensional workpiece from a molten material (1), in particular a molten metal, in which method the molten material (1) is supplied to a compression chamber (2) and delivered in drop form via an injector hole (4) by means of a pressure pulse which is generated with the aid of a reciprocating piston (3) that delimits the compression chamber (2). According to the invention, the compression chamber (2) is degassed before manufacturing begins and/or during a pause in the manufacturing. In a first step, ultrasonic waves are coupled into the molten material (1) in the compression chamber (2), which generate a force (FBjrk) that makes the gas in the molten material (1) sink, and in a second step, after the ultrasonic excitation has ended, the piston (3) is introduced deeper into the compression chamber (2) in order to remove the rising gas via a conduit (5) of the piston (3). The invention also relates to a device for carrying out the method according to the invention.