Method and device for producing a three-dimensional object

US10946446B2 · kind B2 · utility

Assignee

• EOS GmbH Electro Optical Systems · DE

Inventors

• Robert Achim Domröse · Germering, DE
• Michael Hutzel · Dachau, DE
• Alexander Schilling · Munich, DE
• Andre Danzig · Egenburg, DE
• Jorg Hamann · Ingolstadt, DE
• Thomas Hess · Frankfurt, DE
• Marc Dimter · Kornwestheim, DE

Key dates

• Filing date: May 28, 2019
• Grant date: Mar 16, 2021
• Expiry date: May 28, 2039

Classification

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

Abstract

A method for producing a three-dimensional object by applying layers of a pulverulent construction material and by selectively solidifying said material by the action of energy comprises the steps: a layer of the pulverulent construction material is applied to a support or to a layer of the construction material that has been previously applied and at least selectively solidified; an energy beam from an energy source sweeps over points on the applied layer corresponding to a cross-section of the object to be produced in order to selectively solidify the pulverulent construction material; and a gas flow is guided in a main flow direction (RG) over the applied layer during the sweep of the energy beam. The main flow direction (RG) of the gas flow (G) and the sweep direction (RL) of the energy beam are adapted to one another at least in one region of the cross-section to be solidified.