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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Schuschnigg, Stephan
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Topics
Publications (34/34 displayed)
- 2024Simulation of the Melting Region in Additive Manufacturing Material Extrusion Dies for Highly Filled Feedstocks
- 2024Comparative analysis of binder systems in copper feedstocks for metal extrusion additive manufacturing and metal injection mouldingcitations
- 2024Production of Permanent Magnets from Recycled NdFeB Powder with Powder Extrusion Mouldingcitations
- 2024Binder System Composition on the Rheological and Magnetic Properties of Nd-Fe-B Feedstocks for Metal Injection Moldingcitations
- 2024Rapid tooling for rubber extrusion molding by digital light processing 3D printing with dual curable vitrimerscitations
- 2024Additive Manufacturing Material Extrusion @ Institute of Polymer Processing
- 2023Susmagpro
- 2023Debinding And Sintering Strategies For Fused Filament Fabrication Of Aluminium Alloyscitations
- 2023Effects of Different Polypropylene (PP)-Backbones in Aluminium Feedstock for Fused Filament Fabrication (FFF)citations
- 2023Validation Of Alternative Binders for Pellet Extrusion 3D Printing Of 316L Steels
- 2022Research Progress on Low-Pressure Powder Injection Moldingcitations
- 2022In-situ alignment of 3D printed anisotropic hard magnetscitations
- 2021Thermal conductive, electrically insulating polymer compounds using material extrusion additive manufacturing for electronic parts
- 2021Powder content in powder extrusion moulding of tool steelcitations
- 2020Additive Fertigung metallischer und keramischer Bauteile
- 2019Fabrication and properties of extrusion-based 3D-printed hardmetal and cermet componentscitations
- 2019Filament-extrusion 3D printing of hardmetal and cermet parts
- 2018Feedstocks for the Shaping-Debinding-Sintering Process of Multi Material Components
- 2018Adhesion of standard filament materials to different build platforms in material extrusion additive manufacturing
- 2018Material Extrusion Additive Manufacturing for Photocatalytic Applications
- 2018Highly-filled Polymers for Fused Filament Fabrication
- 2018Additive Manufacturing of Metallic and Ceramic Components by the Material Extrusion of Highly-Filled Polymerscitations
- 2018Polypropylene Filled With Glass Spheres in Extrusion‐Based Additive Manufacturingcitations
- 2017Effect of the printing bed temperature on the adhesion of parts produced by fused filament fabricationcitations
- 2016Dissipative particle dynamics simulations of orientation of layered silicate particles embedded in polymer melts under shear flowscitations
- 2016Structure of Polypropylene Macromolecules in the Vicinity of Fe2O3 Surface
- 2016Effect of Particle Size on the Properties of Highly-Filled Polymers for Fused Filament Fabrication
- 2016Bonding Forces in Fused Filament Fabrication
- 2016Coupled Orientation and Stretching of Chains in Mesoscale Models of Polydisperse Linear Polymers in Startup of Steady Shear Flow Simulationscitations
- 2016Haftungsvorhersage und Haftungsverbesserung im Fused Filament Fabrication (FFF) Prozess
- 2016Special Materials and Technologies for Fused Filament Fabrication
- 2016Properties for PIM Feedstocks Used in Fused Filament Fabrication
- 2016Optimization of twin screw extrusion using CFD for polymer/nanoclay composites
- 2015Optimization of Twin Screw Extrusion using CFD for Polymer/Nanoclay Composites
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document
Simulation of the Melting Region in Additive Manufacturing Material Extrusion Dies for Highly Filled Feedstocks
Abstract
Material Extrusion (MEX) is a simpler AM technology, affordable also for home use. There are different designs of the dies, and we investigated two designs (MK10 and E3D), with each two variants. We assumed that the forces of the filament are related to the melt pool and not on the friction. For the investigation we used Ansys Polyflow and constructed the nozzle assemblies. We used a highly filled feedstock (55 vol.% 316L steel powder in a polymeric binder) and measured the temperature and shear dependent viscosity and the other material data. The region where we assume solid filament has a temperature dependent slip condition as a boundary, to obtain a smoother transition between the solid area and the melting region. The thermal conditions are different for each variant. The MK10 variants are an all-metal construction and a PTFE tube inside. The E3D version has a shorter or longer PTFE insert. The calculations showed interesting results, especially for the temperatures, whereas the pressures were not satisfactory as the temperature dependent viscosity model had to be adapted to calculate lower temperatures. The temperature of the all-metal design showed that, at low extrusion speeds, the melt pool was approximately 15 mm, while in the PTFE version it was only 10 mm. At higher speeds the temperature in the all-metal does not change much, but in the PTFE the desired temperature cannot be reached. In the E3D version we can see similar results between the long and short PTFE tubes. One thing is the high thermal conductivity of the feedstock at 0.98 W/(m·K), in contrast to polymers having about 0.2 W/(m·K). The MEX printer is set at increasing speeds until the gears can be heard trying to push the filament, but the solid filament is blocked in the die because there is not enough heaHng capacity. This can be heard during trials to achieve maximum prinHng speeds. The next steps are measurements with <br/>a die equipped with a load cell between the die and the gear.