About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
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Process Development
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Presentation Title |
Development of a Variable Tensioning System to Reduce Separation Force in Large-scale Stereolithography |
Author(s) |
Hongtao Song, Nicholas Rodriguez, Morgan Chen, Carolyn Seepersad, Richard Crawford, Eric Duoss |
On-Site Speaker (Planned) |
Hongtao Song |
Abstract Scope |
Projection micro stereolithography (PµSL) is a powerful additive manufacturing tool, offering unparalleled resolution and throughput, but the ability to print high viscosity resin on a large-scale is limited. One of the key challenges in PµSL is to separate a newly polymerized layer from the vat floor without damaging the part. Since the separation force scales up with the printing area, the risk of damaging the part increases significantly with larger-scale systems and must be addressed. In this paper, a novel roll-to-roll, variable tensioning system is proposed to reduce the separation force during printing. A mathematical model is proposed to predict the separation force for different 2D geometries, and a set of experiments is conducted on an experimental prototype to validate the model. The effect of different separation parameters including peel rate and peel angle is discussed in detail. The results showed that the proposed system reduces the separation force significantly. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |