The purpose of this paper is to present a direct digital manufacturing (DDM) process that is an order of magnitude faster than other DDM processes that are currently available. The developed process is based on a mask-image-projection-based stereolithography (MIP-SL) process, in which a digital micromirror device (DMD) controls projection light to selectively cure liquid photopolymer resin. In order to achieve high-speed fabrication, we investigate the bottom-up projection system in the MIP-SL process. A two-way linear motion approach has been developed for the quick spreading of liquid resin into uniform thin layers. The system design and related settings for achieving a fabrication speed of a few seconds per layer are presented. Additionally, the hardware, software, and material setups for fabricating three-dimensional (3D) digital models are presented. Experimental studies using the developed testbed have been performed to verify the effectiveness and efficiency of the presented fast MIP-SL process. The test results illustrate that the newly developed process can build a moderately sized part within minutes instead of hours that are typically required.
A Fast Mask Projection Stereolithography Process for Fabricating Digital Models in Minutes
Pan, Y., Zhou, C., and Chen, Y. (September 10, 2012). "A Fast Mask Projection Stereolithography Process for Fabricating Digital Models in Minutes." ASME. J. Manuf. Sci. Eng. October 2012; 134(5): 051011. https://doi.org/10.1115/1.4007465
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