About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Increased Spatial Resolution With a Single Nozzle in Fused Filament Fabrication Through Controlled Distributions and Volume Fractions of Soluble and Insoluble Materials Including Formation of Functionally Graded Lattices |
Author(s) |
Ian Andrew Rybak, Joseph McKee, Joshua Taylor Green |
On-Site Speaker (Planned) |
Ian Andrew Rybak |
Abstract Scope |
Extrusion height and width are characteristics of spatial resolution in fused filament fabrication which are inextricably linked to nozzle diameter. Unlike structure size which is constrained by nozzle diameter and print stability, void dimensions may be controlled through the relative spacing of neighboring extrusions. To print features using a single nozzle with increased resolution as compared to conventional print methods, soluble support material was co-extruded with insoluble material in a multi-inlet active-mixing hotend including proportional mixing rod rotation. The ratio of materials and their rotational distribution in the hotend was controlled in situ. Specimens were printed with connecting extrusions and support material was removed during post-processing to produce features smaller than the extrusion size. The versatility of this technique is demonstrated through microstructural control and the fabrication of functionally graded lattice systems using multiple inlets and variable volume fraction of materials and relative mixing rod rotation. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |