About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
|
Materials
|
Presentation Title |
Flowability Measurements of Different SLS Materials at Elevated Temperatures with a Modified Schulze Ring Shear Tester |
Author(s) |
Moritz Rüther, Dietmar Schulze, Hans-Joachim Schmid |
On-Site Speaker (Planned) |
Moritz Rüther |
Abstract Scope |
To process new materials on SLS equipment, knowledge about the flowability of the powders is essential. An established method for measuring the flowability of bulk materials is the Schulze Ring Shear Tester. However, it is problematic that in SLS 3D printers the material is applied at elevated temperatures, but so far measurements with the Ring Shear Tester under near-process conditions have not been possible. For this reason, parts of a commercial Schulze Ring Shear Tester (type RS-XS.s) were modified to enable reliable flowability measurements at elevated temperatures. The tasks of these modifications were to keep the temperature in the sample constant during a measurement and to prevent heat dissipation into the housing so that damage to the electronics could be excluded. With this modified ring shear tester, the flowability of various SLS materials was measured for different temperatures and the results will be presented. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |