工艺与制造英文2024被引 2
基于正交双色光引发和光抑制的快速连续三维打印
Rapid Continuous 3D Printing via Orthogonal Dual-Color Photoinitiation and Photoinhibition
Min Hu, Haobo Cheng, Yunpeng Feng · School of Optics and Photonic, Beijing Institute of Technology, Beijing, China.
摘要整理
立体光刻增材制造技术已从点扫描曝光发展到逐层掩膜固化，再到体积打印。快速成型是研究人员追求的重要目标。本文提出了一种基于双色光引发和光抑制的连续三维打印系统，旨在进一步提高打印速度。通过紫外光束（355 nm）在固化部分与窗口间生成的反聚合层，结合蓝光（470 nm）动态掩膜，实现连续三维打印过程。反聚合层体积可通过入射光强度比（I_UV,0/I_blue,0）和紫外激光光斑尺寸调节，以增强液态树脂的回流填充率。对于正交高斯反聚合层，强度比为28.6时，可实现97.1%的抑制效率，反聚合区高度为1 mm。流固耦合相互作用模拟分析表明，增加反聚合层厚度能有效提高树脂填充率和打印截面积，同时降低固化部分的应力。两种不同三维结构的打印实验证明，在反聚合层厚度较大时，填充率和应力对打印过程几乎无影响，打印速度可达200 μm/s。随着系统改进和树脂优化，打印体积和复杂度有进一步提升的空间。
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