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Wall-slip velocity as a quantitative measure of powder-binder separation during powder injection moulding
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SYSNO ASEP 0358187 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Wall-slip velocity as a quantitative measure of powder-binder separation during powder injection moulding Author(s) Hausnerová, B. (CZ)
Marcaníková, L. (CZ)
Filip, Petr (UH-J) ORCID, RID, SAI
Sáha, P. (CZ)Number of authors 4 Source Title World PM2010 Proceedings: volume 4. - Shrewsbury : European Powder Metallurgy Association, 2010 - ISBN 978-1-899072-13-2 Pages s. 557-562 Number of pages 6 s. Action Powder Metallurgy World Congress & Exhibition – PM2010 Event date 10.10.2010-14.10.2010 VEvent location Florencie Country IT - Italy Event type WRD Language eng - English Country GB - United Kingdom Keywords powder injection moulding ; powder-binder separation ; wall-slip velocity Subject RIV BK - Fluid Dynamics R&D Projects GA103/08/1307 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20600510 - UH-J (2005-2011) Annotation This paper points out the specific features of PIM compounds which should be taken into account in their rheological characterization as a necessary approach to optimize moulding step of the process. A lot of effort has been paid to describe the powder-binder separation during the flow through the mould channels in the quantitative way. Flow curves of the materials undergoing the structural changes during shearing are not a monotonically decreasing, but they exhibit minima/maxima upon increasing shear rate. The multi-parameter rheological model, describing the flow peculiarities of PIM compounds, must be firstly developed and approved on reliable experimental data. It is supposed that wall slip can serve as a quantitative parameter directly connected to the powder-binder separation. As it depends not only on material and processing parameters, but also on the microscopic nature of a channel wall, rheometer with special roughened plates was designed to carry out wall slip measurement. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2011
Number of the records: 1