Authors:
Christian Kukla (Montanuniversitaet Leoben, Austria),
Stephan Schuschnigg (Montanuniversitaet Leoben, Austria),
Martin Hubmann (Montanuniversitaet Leoben, Austria),
Clemens Holzer (Montanuniversitaet Leoben, Austria),
Joamin Gonzalez-Gutierrez (Luxembourg Institute of Science and Technology, Luxembourg)
Abstract:
Material extrusion (MEX), especially fused filament fabrication (FFF), is the most widespread technology for additive manufacturing, mainly for polymers.Currently, many material extrusion printers and nozzle designs are available from different manufacturers. These different nozzle designs result in different melting and flow behaviour. Therefore, their design is critical for the printing of high-quality parts. Since feedstocks and polymers have different characteristics, we evaluated the processing of an Ampersint 1558 tool steel feedstock with two different nozzle designs (nozzle with a PTFE tube insert, all-metal nozzle) using finite element method (FEM) simulations with the programs Ansys Polyflow and Autodesk Moldflow Insight.Feedstock’s rheological and thermal properties were measured and used for simulation of FFF with the two nozzle designs at different printing speeds. Finally, the trends observed in the simulations were compared to experimental results, providing recommendations for the design of FFF nozzles for feedstocks.
DOI:
https://doi.org/10.59499/WP225370324