面成型光固化快速成形技术发展的关键要素的研究现状

摘要

Based on the introduction of stereo lithography appearance (SLA) technology classification,the concept of mask projection stereo lithography appearance (MPS)is put forward for the existing problems of the scanning SLA,and the advantages and problems of MPS is pointed out.Then,the components of MPS are described,and the forming way of MPS can be divided into the top-exposure stereo lithography and the bottom-exposure stereo lithography on the basis of different base plane,and the advantages and disadvantages of the two molding methods are compared.With the precision as the measurable index,the factors which affect the precision of the MPS including the accuracy of mask patterns,the matching properties between light and resin and the kinematic accuracy of lifting platform are expounded at home and abroad.Taking into the strength as the measurable index,the research status of scanning SLA strength and the resin shrinkage distortion with the strength optimization method during the process of MPS are elaborated around the world.Finally,according to the above analysis,the future development of the MPS is prospected,the concept of continuous liquid interface production is put forward.The problems including the control of the oxygen resistance film thickness,the improvement of processing resolution and the change of the light source that need to be solved in the future surface forming process.%全面介绍了光固化技术的分类,针对扫描式光固化技术存在的问题,提出了面成型技术的概念,指出了面成型工艺的优势以及存在的问题;阐述了面成型工艺的组成部分,根据制造基准面的不同,面成型工艺方法可以分为自由液面式和约束液面式,并针对两种成型方式的优缺点进行了对比;以精度为衡量指标,重点介绍了影响面成型工艺精度的掩模图形精度、光源与树脂匹配性、升降台运动精度的国内外研究现状;以强度为衡量指标,阐述了扫描式光固化强度的研究现状、面成型光固化树脂收缩变形以及面成型工艺强度优化方法的研究现状;最后,根据以上的分析对面成型技术未来的发展进行了展望,提出了连续液面生长技术的概念,未来面成型工艺需要解决的问题包括氧阻聚膜厚的控制、加工分辨率的提高、光源的改变.