Kalilayeva Aknur, Zhumashev Danial, Wei Dongming, Perveen Asma, Talamona Didier
Department of Mathematics, Nazarbayev University, Qabanbay Batyr Ave. 53, Astana 010000, Kazakhstan.
Department of Mechanical and Aerospace Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan.
Polymers (Basel). 2024 Nov 27;16(23):3311. doi: 10.3390/polym16233311.
The rapid investment casting (RIC) process requires a 3D-printed pattern to create a ceramic mold. Stereolithography (SLA) is a commonly used 3D printing method for pattern creation due to its ability to print complex shapes with smooth surfaces. The printing parameters can significantly affect the dimensional accuracy of the pattern. This study examines how different build orientations (0°, 45°, and 90°) affect the dimensional accuracy of parts produced using SLA. The specimens were printed using castable wax resin. They were measured to investigate the dimensional deviations using 3D scanning technology to understand the correlation between orientation and accuracy better. It was found that the orientation of the print affects the overall accuracy significantly. Parts printed at a 45° angle generally showed the smallest deviations from their nominal dimensions, except for certain features. For instance, cylindrical features showed deviations improving from -7.28% at 0° to -4.81% at 90°, while spherical features had deviations decreasing from -5.01% at 0° to -2.46% at 90°. Simple features, such as holes, exhibited minimal deviation across orientations, with the smallest error observed at 45° (1.98%). These results demonstrate different features and build orientations can affect the accuracy of the printed part differently. To ensure better accuracy, parts printed in different build orientations will require varying amounts of compensation during the design stage. By managing build orientations and controlling the inherent limitations of SLA, users can improve the print's accuracy and meet quality standards more effectively. Research results can help industries optimize print settings and reduce dimensional errors.
快速熔模铸造（RIC）工艺需要一个3D打印的模型来制作陶瓷模具。立体光刻（SLA）是一种常用的用于制作模型的3D打印方法，因为它能够打印出具有光滑表面的复杂形状。打印参数会显著影响模型的尺寸精度。本研究考察了不同的构建方向（0°、45°和90°）如何影响使用SLA生产的零件的尺寸精度。使用可铸造蜡树脂打印试样。使用3D扫描技术对其进行测量以研究尺寸偏差，从而更好地了解方向与精度之间的相关性。研究发现打印方向对整体精度有显著影响。以45°角打印的零件通常显示出与标称尺寸的偏差最小，但某些特征除外。例如，圆柱形特征的偏差从0°时的-7.28%改善到90°时的-4.81%，而球形特征的偏差从0°时的-5.01%减小到90°时的-2.46%。简单特征，如孔，在不同方向上的偏差最小，在45°时观察到的误差最小（1.98%）。这些结果表明不同的特征和构建方向会对打印零件的精度产生不同的影响。为确保更高的精度，在设计阶段，不同构建方向打印的零件将需要不同的补偿量。通过管理构建方向并控制SLA的固有局限性，用户可以提高打印精度并更有效地满足质量标准。研究结果可以帮助行业优化打印设置并减少尺寸误差。
