Study on improvement of printing quality for material-jetting additive manufacturing

• Main Authors: Chao-Yen Hu, 胡兆言
• Other Authors: Yih-Lin Cheng
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/55f238

碩士 === 國立臺灣科技大學 === 機械工程系 === 106 === Material Jetting (MJ) is one of the more accurate 3D printing processes, and the use of support material in the process is necessary. However, after the finished product is printed and the support material is removed, the surface roughness and dimensional accuracy are poor. Therefore, this study designed and improved each module of the machine, found the most suitable parameters from the process parameter tests and proposed a strategy to improve the printing quality. The above improved methods improved the quality of the finished product. This study used a self-created light-curing 3D printer. Also, designing for each modules of the machine to improve the stability and the printing quality. At the same time, the most suitable parameters are found out from the tests of the basic properties of the droplets, the thickness of the laminate, the most suitable rotational speed of the roller, and the selection of the amount of material. Then, it used the most suitable parameters and the printing strategy proposed by this study together to do tests. It was found that the improved process was significantly reduced by 63% compared to the original process, and the dimensional accuracy in the XY horizontal direction was reduced from the original error of 4.8% to 0.3%. It proves that the process improvement and the proposed printing strategy of this research can improve the surface quality of the finished product after removing the support material.