Effect of particle rounding on the processability of polypropylene powder and the mechanical properties of selective laser sintering produced parts

Gomez Bonilla JS, Kletcher R, Lanyi F, Schubert DW, Bück A, Schmidt J, Peukert W (2019)


Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2019

Publisher: The University of Texas at Austin

Pages Range: 790-798

Event location: Austin US

URI: https://www.scopus.com/record/display.uri?eid=2-s2.0-85095971435&origin=inward

Abstract

Common techniques for the production of polymer powders for selective laser sintering (SLS) involve the comminution of polymers. Comminution of polymers often results in powders made of irregular shaped particles with a low bulk density and a bad flow behavior. With the aim to improve the flowability of grinded powders and, thus, the SLS processability, a thermal process for particle shape modification was developed. This has been applied successfully for a broad variety of thermoplasts. In this contribution, a modified design of a rounding reactor with direct heating and optimized geometry is presented. The performance of the new design is assessed by the rounding of commercially available polypropylene powders. The influence of the rounding process on the packing density, flowability and particle size and shape distributions of the powders is investigated. Test specimens produced by SLS were tested to assess the effect of the rounding process on the mechanical properties of the produced parts. © Solid Freeform Fabrication 2019: Proceedings of the 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019. All rights reserved.

Authors with CRIS profile

How to cite

APA:

Gomez Bonilla, J.S., Kletcher, R., Lanyi, F., Schubert, D.W., Bück, A., Schmidt, J., & Peukert, W. (2019). Effect of particle rounding on the processability of polypropylene powder and the mechanical properties of selective laser sintering produced parts. In The University of Texas in Austin (Eds.), Proceedings of the 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019 (pp. 790-798). Austin, US: The University of Texas at Austin.

MLA:

Gomez Bonilla, Juan Sebastian, et al. "Effect of particle rounding on the processability of polypropylene powder and the mechanical properties of selective laser sintering produced parts." Proceedings of the 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019, Austin Ed. The University of Texas in Austin, The University of Texas at Austin, 2019. 790-798.

BibTeX: Download