About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
The Influence of Grain Size Distribution of PA12 on Key Steps of the Polymer Laser Sintering Process |
Author(s) |
Jens P.W. Sesseg, Paul Riedmann, Sybille Fischer, Hans-Joachim Schmid |
On-Site Speaker (Planned) |
Jens P.W. Sesseg |
Abstract Scope |
As the industry pushes for higher resolution laser sintering, finer and finer powders are required. Yet, this changes the way powders behave during the process. The influence of finer particles on the dosing and coating process during laser sintering is being investigated in this project. PA12 laser sintering powder without flow additives was sieved to four fractions with grain sizes D50 of 42, 54, 61 and 66 µm. These fractions were characterized regarding powder flowability by FT4 powder rheometer. The dosing and coating behavior of these fractions was tested at both RT and at 168°C in separate experiments on an EOS P395 on which also test jobs were built with the fractions. The larger portion of fines in the finest fraction dominated the powder properties and led to significantly different powder behavior during the dosing and coating steps, as predicted by analytical measurements. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |