Rounded-particle plastic powder in particular for application in laser sintering, method for production of such a powder and laser sintering process using such a powder

US7601422B2 · kind B2 · utility

Assignee

• EOS GmbH Electro Optical Systems · DE

Inventors

• Mandy Gersch · Ulm, DE
• Frank Müller · Birkenfeld, DE
• Thomas Mattes · Germering, DE
• Peter Keller · Bruchmühlbach-Miesau, DE

Key dates

• Filing date: Oct 6, 2003
• Grant date: Oct 13, 2009
• Expiry date: Mar 19, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In a laser sintering method for producing a three-dimensional object wherein subsequent layers of the object to be formed are subsequently solidified on positions corresponding to the object, as a build-up material, a powder is used wherein the upper grain limit of the powder particles is below 100 μm, the D0.5-value is below 55 μm, the BET-surface is smaller than 5 m2/g and the grains of the powder basically have a spherical shape.