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Influence of capillary die geometry on wall slip of highly filled powder injection molding compounds
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SYSNO ASEP 0481288 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Influence of capillary die geometry on wall slip of highly filled powder injection molding compounds Author(s) Sanétrník, D. (CZ)
Hausnerová, B. (CZ)
Filip, Petr (UH-J) ORCID, RID, SAI
Hnátková, E. (CZ)Source Title Powder Technology. - : Elsevier - ISSN 0032-5910
Roč. 325, February (2018), s. 615-619Number of pages 5 s. Publication form Print - P Language eng - English Country CH - Switzerland Keywords powder injection molding ; highly filled polymer ; wall slip ; capillary entrance angle Subject RIV BK - Fluid Dynamics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA17-26808S GA ČR - Czech Science Foundation (CSF) Institutional support UH-J - RVO:67985874 UT WOS 000425476700063 EID SCOPUS 85037108002 DOI 10.1016/j.powtec.2017.11.041 Annotation Uneven distribution of solid particles contained in the feedstocks used in the process of powder injection molding (PIM) is observed in the close vicinity of the walls. A particle-free thin layer adjacent to the walls is formed by the binder only and is characterized by so-called wall slip. Wall slip is a key to successful modeling of injection molding step of PIM. For its determination we used capillary rheometers equipped with the dies of different entrance angles applied to four PIM feedstocks. The entrance angle has been found to be a crucial parameter to intercept wall slip. Conical dies are more suitable to obtain reliable slip velocity values of highly filled compounds than capillaries having plane entrance, which are used in the majority of studies. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2019
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