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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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.

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
Number of pages:f. 1-17
Numbering:Vol. 6, iss. 6
ISSN on article:2075-4701
DOI:10.3390/met6060129 Link is opened in a new window
COBISS.SI-ID:14692379 Link is opened in a new window
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Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0264, L2-6761
Name:Trajnostni Polimerni materiali in Tehnologije, Izboljšava pretočnosti in gostote surovine za nano injekcijsko brizganje prahov (nanoPIM)

Secondary language

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

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