Device for producing three-dimensional objects layer by layer

US11511488B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Maik Grebe · Bochum, DE
• Wolfgang Diekmann · Waltrop, DE
• Sigrid Hessel · Haltern am See, DE
• Maximilian Gruhn · Marl, DE

Key dates

• Filing date: Dec 17, 2018
• Grant date: Nov 29, 2022
• Expiry date: Dec 17, 2038

Classification

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

Abstract

A device produces three-dimensional objects layer by layer in a powder bed fusion process. The device includes a building space, at least one energy source, a building area with a building space platform and a building space container laterally confining the building space platform. The building space platform has an upper side, facing a powder, and an underside, facing away from the powder. The upper side of the building space platform includes a material with a thermal conductivity of at least 20 W/(m·K) and the underside of the building space platform includes a material with a thermal conductivity of a maximum of 0.5 W/(m·K). The contact surface of the upper side of the building space platform with respect to the powder or with respect to the cooling medium is raised by at least 20% in comparison with the planar surface of a building space platform.