About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Recycling of Polymer Powders in SLS: Consequences on Flowability and Electrostatic Properties |
Author(s) |
Aurelien Neveu, Kerstin Michalke, Filip Francqui |
On-Site Speaker (Planned) |
Aurelien Neveu |
Abstract Scope |
The reuse of polymer powders is common in powder bed-based additive manufacturing to reduce the cost associated with feedstock supply. However, in such processes, the powder bed is heated at a temperature close to the melting point of the material, which can lead to an alteration of its properties. In this study, the influence of the reuse of polymer in a SLS process has been investigated. Several mixes (50%/50%) of fresh (unused) and used PA12 have been produced and characterized. Especially, the change in powder flowability, a key characteristic for a good spreadability, has been highlighted by a rotating drum method (GranuDrum, GranuTools). Furthermore, the electrostatics (tribocharging) properties of the fresh and used powders are assessed (GranuCharge, GranuTools). We show that the influence of the processing conditions on the powder properties has to be taken into account to define a reliable reuse strategy guaranteeing the quality of the final parts. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |