| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Presentation Title |
Insights on Multi-Extrusion Filament Fabrication: Exploring the Impact of Seam Overlap and Ironing Process |
| Author(s) |
Manuel Sardinha, Luís Reis, Joaquim Justino Netto, Nuno Frutuoso, Marco Leite |
| On-Site Speaker (Planned) |
Manuel Sardinha |
| Abstract Scope |
Within additive manufacturing technologies, polymer extrusion has witnessed significant development in recent years. Nonetheless, the manufacturing of large-format parts remains a challenging task. Cooperative and independent extrusion systems show promise for the efficient fabrication of large components, but often introduce problems such as seams (bonding between material deposited by different extruders) that act as localized part weaknesses. Given that the diffusion of polymer molecules through a given interface depends on the available contact area and is greatly influenced by temperature, the authors hypothesize that increasing the contact surface and local temperature might improve part strength. In this study, the authors evaluate how overlapping seam areas affect the tensile properties of PLA samples produced with multiple extrusion systems. Besides overlapping, the effect of ironing (a thermal-based post-processing technique originally designed to smooth the top layers of parts) in overlapped areas is also studied. Results highlight the importance of overlaps and confirm that the fracture mechanism of heat-affected areas is different when compared with non-affected ones, suggesting that the mechanical properties of parts with seams can be improved, but further studies are needed. With this knowledge, the authors aim to help the process of designing large polymer parts using collaborative 3D printing. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |