About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Volumetric Sintering of Polymers via Radio Frequency Additive Manufacturing |
Author(s) |
Hongtao Song, Ali Sohaib, Jared Allison, Joseph Beaman, Richard Hague, Chris Tuck, Carolyn Seepersad |
On-Site Speaker (Planned) |
Hongtao Song |
Abstract Scope |
Radio Frequency Additive Manufacturing (RFAM) utilizes Radio Frequency (RF) radiation to heat and sinter an entire part simultaneously in a polymer powder bed. By selectively depositing electrically conductive dopants into an insulating polymer powder bed, it is possible to sinter a part rapidly and volumetrically with RF heating. In this work, the feasibility of RF heating is demonstrated by volumetrically sintering parts that are either cast from hand-mixed graphite-Nylon 12 powder mixtures or doped by a commercial binder jetting printer. The result showed that adding graphite powder to the Nylon 12 powder bed can generate sufficient heat to sinter a part fully, but heating uniformity is a challenge related to the dopant density and the geometry of the part. Parts with uniform dopant density exhibit distorted geometry after sintering; fine-tuning the dopant density across the powder bed improves heating uniformity and enhances the geometric accuracy of the sintered parts. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |