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

US12257625B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Benjamin Schweizer · Horb, DE
• Eberhard Maier · Weiler-Langweiler, DE
• Peter Voehringer · Kornwestheim, DE
• Roland Bleher · Stuttgart, DE

Key dates

• Filing date: Feb 7, 2020
• Grant date: Mar 25, 2025
• Expiry date: May 6, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/25
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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.