Method for identifying laser sintering powders

US10807304B2 · kind B2 · utility

Assignee

• EOS GmbH Electro Optical Systems · DE

Inventors

• Peter Keller · Bruchmühlbach-Miesau, DE
• Thomas Mattes · Germering, DE
• Mandy Gersch · Ulm, DE
• Johann Oberhofer · Unterschleißheim, DE
• Anton Mayer · Niedernhausen, DE

Key dates

• Filing date: Nov 19, 2009
• Grant date: Oct 20, 2020
• Expiry date: Jun 30, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/38
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method is presented that makes possible the labelling of powders that can be applied as building material in a layer-additive manufacturing method such as a selective laser sintering method. To this effect the powder is mixed with at least one salt of a metal of the rare earths, wherein the salt has the property that it shows a luminescence when being irradiated with photons having a wavelength outside of the visible spectrum or with particle radiation. Thereby, parts that have been manufactured by means of the layer-additive manufacturing method can be identified with regard to the manufacturer, the place of manufacture or the manufacture date.