Robert Boschgmbh

Peter Voehringer

Eberhard Maier

Benjamin Schweizer

Juergen Ulm

Roland Bleher

Udo Riegler

Juergen Fridrich

The invention relates to a method for the rapid manufacture of a three-dimensional workpiece from a molten material (), in particular a molten metal, in which method the molten material () is supplied to a compression chamber () and delivered in drop form via an injector hole () by means of a pressure pulse which is generated with the aid of a reciprocating piston () that delimits the compression chamber (). According to the invention, the compression chamber () 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 () in the compression chamber (), which generate a force (F) that makes the gas in the molten material () sink, and in a second step, after the ultrasonic excitation has ended, the piston () is introduced deeper into the compression chamber () in order to remove the rising gas via a conduit () of the piston (). The invention also relates to a device for carrying out the method according to the invention.

Method and device for rapid three-dimensional workpiece from a molten material

The invention relates to a method for the additive manufacturing of a three-dimensional workpiece from a liquid material (), in which method the liquid material () is fed to a displacement chamber () and discharged in drop form via a jet hole () by means of a pressure pulse which is generated with the aid of a reciprocating piston () delimiting the displacement chamber (). According to the invention, in order to optimise the wetting properties of at least one surface () which delimits the displacement chamber () and/or the jet hole (), sound waves are coupled into the liquid material () for a limited period of time with the aid of the piston () which is caused to vibrate for this purpose. The invention also relates to a device for carrying out the method according to the invention.

Manufacturing of a three-dimensional workpiece from a liquid material

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Kornwestheim, Germany

Peter Voehringer