Three-dimensional layer-by-layer production process with powders based on cyclic oligomers

US7988906B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Sylvia Monsheimer · Haltern am See, DE
• Alexander Richter · Johannesweg, DE

Key dates

• Filing date: Jul 12, 2006
• Grant date: Aug 2, 2011
• Expiry date: Jun 18, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B33Y80/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for the production of moldings via a layer-by-layer process by selectively melting regions of one or more powder layers that contain cyclic oligomers and have a median grain diameter determined by laser diffraction of between 25 and 150 μm via input of electromagnetic energy, and permitting the layers to solidify to provide a solid mass, where selectivity is achieved by applying one or more aids amongst the group of susceptors, inhibitors, absorbers, masks, and focusing of a laser beam.