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A Review of Critical Issues in High-Speed Vat Photopolymerization
Sandeep Kumar Paral1,2, Ding-Zheng Lin2, Yih-Lin Cheng2
1High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Taipei 106, Taiwan.
High-speed vat photopolymerization (VPP) requires faster printing and larger areas. This review examines challenges like separation force and light homogeneity to improve volumetric print rates for digital light processing (DLP) and liquid crystal display (LCD) VPP.
Area of Science:
- Additive Manufacturing
- Photopolymerization Science
Background:
- Vat photopolymerization (VPP) offers high accuracy and surface finish using mask projection.
- Digital light processing (DLP) and liquid crystal display (LCD) VPP are popular industrial AM methods.
Purpose of the Study:
- To identify challenges hindering high-speed VPP (digital light processing and liquid crystal display) and review solutions.
- To guide future research for increased volumetric print rates in VPP.
Main Methods:
- Review of existing literature on vat photopolymerization techniques.
- Analysis of challenges in digital light processing (DLP) and liquid crystal display (LCD) VPP.
Main Results:
- Key challenges include high separation forces, slow resin refilling, irradiance inhomogeneity in LCDs, and limitations in DLP projection area.
- Current solutions for these issues are analyzed.
Conclusions:
- Addressing separation force, resin refilling, light homogeneity, and projection area limitations is crucial for high-speed VPP.
- Further research is needed to develop more productive and cost-effective high-speed VPP systems.
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