Electrophotographic Multilayer Powder Pattern Deposition for Additive Manufacturing

  • The use of electrophotographic polymer powder transfer for the preparation of patterned powder layers is discussed with respect to a possible multimaterial application in powder bed-based additive manufacturing technologies such as selective laser sintering (SLS). Therefore, an experimental setup with a two-chamber design was realized, enabling the electrophotographic transfer of SLS powder materials at typical process conditions. The powder development (pick-up) step was investigated thoroughly for different powder materials to provide deep understanding of the underlying electrostatic effects and the influence of distinct powder properties. While using two different development modes, differences in the development results were correlated to differences in their particle size distribution, bulk density, and relative permittivity. Moreover, a new strategy was invented, allowing the residual electrophotographic powder deposition to be in general independent from the already produced part height. This is known to be a huge challengeThe use of electrophotographic polymer powder transfer for the preparation of patterned powder layers is discussed with respect to a possible multimaterial application in powder bed-based additive manufacturing technologies such as selective laser sintering (SLS). Therefore, an experimental setup with a two-chamber design was realized, enabling the electrophotographic transfer of SLS powder materials at typical process conditions. The powder development (pick-up) step was investigated thoroughly for different powder materials to provide deep understanding of the underlying electrostatic effects and the influence of distinct powder properties. While using two different development modes, differences in the development results were correlated to differences in their particle size distribution, bulk density, and relative permittivity. Moreover, a new strategy was invented, allowing the residual electrophotographic powder deposition to be in general independent from the already produced part height. This is known to be a huge challenge but is mandatory for the buildup of three-dimensional multimaterial components.show moreshow less

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Metadaten
Author:Thomas Stichel, Clemens Brachmann, Max Raths, Maximilian A. Dechet, Jochen Schmidt, Wolfgang Peukert, Thomas Frick, Stephan Roth
DOI:https://doi.org/10.1007/s11837-019-03965-z
ISSN:1047-4838
Parent Title (English):JOM
Publisher:Springer Science and Business Media LLC
Document Type:Article
Language:English
Date of first Publication:2019/12/19
Release Date:2024/06/24
Volume:72
Issue:3
Pagenumber:10
First Page:1366
Last Page:1375
institutes:Fakultät Maschinenbau und Versorgungstechnik
Institut für Chemie, Material- und Produktentwicklung
Research Themes:Materialien & Produktionstechnik
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