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)
|
Presentation Title |
Controlled Distribution of Composition within Extrusions as Enabled by an Active-mixing Hotend |
Author(s) |
Ian Andrew Rybak, Daniel Lokxui Hernandez, Roger V. Gonzalez, Joshua Taylor Green |
On-Site Speaker (Planned) |
Ian Andrew Rybak |
Abstract Scope |
Local control of composition in additive manufacturing has great potential for improving properties and multifunctional characteristics of printed materials. Dimensional resolution of such composition control in fused filament fabrication is usually limited to the geometry of a single extrusion. To achieve microstructural control within extrusions, an active-mixing hotend was configured to extrude with various proportions of mixing rod rotation and material flow. Distribution control was investigated through optical characterization of extrusion cross-sections at steady state using various polymers, colors, and composites. When at low proportions relative to extrusion, rod rotation affects material phase shape and location. Resultant phase distributions are specific to the extruded material combinations and are affected by extrusion heights and widths. These mechanisms for controlling microstructures can be controlled in situ through software enabling fabrication of multifunctional materials with a wide variety of strength, stiffness, thermal and electrical conductivity, solubility, corrosion resistance, and more. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |