Increasing flowability and bulk density of PE-HD powders by a dry particle coating process and impact on LBM processes

Journal article
(Original article)


Publication Details

Author(s): Peukert W, Blümel C, Sachs M, Laumer T, Winzer B, Schmidt J, Schmidt M, Wirth KE
Journal: Rapid Prototyping Journal
Publisher: Emerald Group Publishing Ltd.
Publication year: 2015
Volume: 21
Journal issue: 6
Pages range: 697-704
ISSN: 1355-2546
Language: English


Abstract


Purpose - The purpose of this paper is to demonstrate the processability of cohesive PE-HD particles in laser beam melting processes (LBM) of polymers. Furthermore, we present a characterization method for polymer particles, which can predict the quality of the powder deposition via LBM processes. Design/methodology/approach - This study focuses on the application of dry particle coating processes to increase flowability and bulk density of PE-HD particles. Both has been measured and afterwards validated via powder deposition of PE-HD particles in a LBM machine. Findings - For efficient coating in a dry particle coating process, the PE-HD particles and the attached nanoparticles need to show similar surface chemistry, i.e. both need to behave either hydrophobic or hydrophilic. It is demonstrated that dry particle coating is appropriate to enhance flowability and bulk density of PE-HD particles and hence considerably improves LBM processes and the resulting product quality. Originality/value - At present, in LBM processes mainly polyamide (PA), 12 particles are used, which are so far quite expensive in comparison to, for example, PE-HD particles. This work provides a unique and versatile method for nanoparticulate surface modification which may be applied to a wide variety of materials. After the coating, the particles are applicable for the LBM process. Our results provide a correlation between flowability and bulk density and the resulting product quality.



FAU Authors / FAU Editors

Blümel, Christina
Professur für Partikeltechnik
Laumer, Tobias
Lehrstuhl für Photonische Technologien
Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Sachs, Marius
Professur für Partikeltechnik
Schmidt, Michael Prof. Dr.-Ing.
Lehrstuhl für Photonische Technologien
Winzer, Bettina
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Wirth, Karl-Ernst Prof. Dr.-Ing.
Professur für Partikeltechnik


How to cite

APA:
Peukert, W., Blümel, C., Sachs, M., Laumer, T., Winzer, B., Schmidt, J.,... Wirth, K.-E. (2015). Increasing flowability and bulk density of PE-HD powders by a dry particle coating process and impact on LBM processes. Rapid Prototyping Journal, 21(6), 697-704. https://dx.doi.org/10.1108/RPJ-07-2013-0074

MLA:
Peukert, Wolfgang, et al. "Increasing flowability and bulk density of PE-HD powders by a dry particle coating process and impact on LBM processes." Rapid Prototyping Journal 21.6 (2015): 697-704.

BibTeX: 

Last updated on 2018-19-04 at 03:46