Nowacki Bartłomiej, Kowol Paweł, Kozioł Mateusz, Olesik Piotr, Wieczorek Jakub, Wacławiak Krzysztof
Faculty of Electrical Engineering, Silesian University of Technology, ul. Bolesława Krzywoustego 2, 44-100 Gliwice, Poland.
Faculty of Materials Engineering, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland.
Materials (Basel). 2021 Aug 26;14(17):4856. doi: 10.3390/ma14174856.
The article discusses the influence of the post-process on the mechanical properties of elements produced with the use of the mask stereolithography (mSLA) method. Printed samples were subjected to the following post-process steps: Washing and post-curing, at various times. Then, static tensile and static bending tests were carried out, as well as Shore D hardness measurements for the inner and surface part of the sample, as well as profilographometric analysis of the surface. The post-curing time has been found to strongly affect the tensile and bending strength of printouts, and to improve their surface quality. Washing has an ambiguous effect on the strength of the printouts, but, in the end, it was found that extended washing slightly reduces the strength. Washing significantly affects the quality of the printout surface. A washing time that is too short results in a surface that strongly resembles the printing process, with high roughness. Increasing the washing time to 10 min lowers the roughness by one order of magnitude. Post-curing has also been shown to be beneficial for the cured sample with the application of shielding water. This approach results in an improvement in the flexural strength of the printouts. In general, the obtained research results indicate that, for printouts with cross-sectional dimensions of several mm, the optimal washing time is no more than 10 min and the post-curing time is at least 30 min.
本文讨论了后处理对使用掩膜立体光刻（mSLA）方法生产的元件机械性能的影响。对打印样品进行了以下后处理步骤：在不同时间进行清洗和后固化。然后，进行了静态拉伸和静态弯曲试验，以及对样品内部和表面部分的肖氏D硬度测量，以及表面轮廓仪分析。已发现后固化时间对打印件的拉伸和弯曲强度有强烈影响，并能改善其表面质量。清洗对打印件的强度有不明确的影响，但最终发现延长清洗时间会略微降低强度。清洗显著影响打印件表面质量。清洗时间过短会导致表面与打印过程非常相似，粗糙度较高。将清洗时间增加到10分钟可使粗糙度降低一个数量级。后固化也已证明对应用屏蔽水的固化样品有益。这种方法可提高打印件的弯曲强度。总体而言，获得的研究结果表明，对于横截面尺寸为几毫米的打印件，最佳清洗时间不超过10分钟，后固化时间至少为30分钟。
