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Models to predict the viscosity of metal injection molding feedstock materials as function of their formulation
Gonzalez-Gutierrez, Joamin (Author), Duretek, Ivica (Author), Kukla, Christian (Author), Poljšak, Andreja (Author), Bek, Marko (Author), Emri, Igor (Author), Holzer, Clemens (Author)

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Abstract
The viscosity of feedstock materials is directly related to its processability during injection molding; therefore, being able to predict the viscosity of feedstock materials based on the individual properties of their components can greatly facilitate the formulation of these materials to tailor properties to improve their processability. Many empirical and semi-empirical models are available in the literature that can be used to predict the viscosity of polymeric blends and concentrated suspensions as a function of their formulation; these models can partly be used also for metal injection molding binders and feedstock materials. Among all available models, we made a narrow selection and used only simple models that do not require knowledge of molecular weight or density and have parameters with physical background. In this paper, we investigated the applicability of several of these models for two types of feedstock materials each one with different binder composition and powder loading. For each material, an optimal model was found, but each model was different; therefore, there is not a universal model that fits both materials investigated, which puts under question the underlying physical meaning of these models.

Language:English
Keywords:feedstock, metal injection molding, models, polypropylene, polyoxymethylene, polymer blends, powder content, rheology, stainless steel, viscosity
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2016
Number of pages:17 str.
Numbering:Vol. 6, iss. 6, art. 129
UDC:531(045)
ISSN on article:2075-4701
DOI:10.3390/met6060129 This link opens in a new window
COBISS.SI-ID:14692379 This link opens in a new window
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Downloads:568
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Record is a part of a journal

Title:Metals
Shortened title:Metals
Publisher:MDPI
ISSN:2075-4701
COBISS.SI-ID:15976214 This link opens in a new window

Document is financed by a project

Funder:Drugi - Drug financer ali več financerjev
Funding Programme:Austria Research Promotion Agency FFG, COMET
Project no.:824187

Funder:EC - European Commission
Funding Programme:H2020
Project no.:636881
Name:Resource Efficient Production Route for Rare Earth Magnets
Acronym:REProMag

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0264
Name:Trajnostni polimerni materiali in tehnologije

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:L2-6761
Name:Izboljšava pretočnosti in gostote surovine za nano injekcijsko brizganje prahov (nanoPIM)

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:01.06.2016

Secondary language

Language:Slovenian
Keywords:surovina, injekcijsko brizganje kovinskega prahu, polipropilen, polioksimetilen, polimerne mešanice, vsebnost prahu, reologija, nerjaveče jeklo, viskoznost

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