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Upflow mitigation strategy for nested printing
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DOI：10.1016/j.cirp.2024.04.047.png)
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Abstract
En 中文
Embedded printing enables the fabrication of integrated and enveloped internal geometries. Upflow, a geometrical deviation resulting from nozzle-translation-induced hydrodynamics, may affect the printing accuracy during embedded printing, in particular, nested printing where multiple layers are disturbed simultaneously during embedded printing internally nested structures within pre-deposited yield-stress structures. For the first time, this study identifies and characterizes two distinct upflow patterns including the interfacial upflow between the depositing and enclosure matrices during nested printing. Furthermore, a four-step upflow mitigation strategy is proposed and evaluated, and its effectiveness is demonstrated in printing a brain limbic system with significantly improved printing fidelity. (c) 2024 CIRP. Published by Elsevier Ltd. All rights reserved.
Keywords:
Additive manufacturing
Optimization
Nested printing
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