下照式光聚合技術流程中，分離力的問題一直是值得深入探討的問題，因為這個問題大幅度影響了 DLP 列印技術之速度以及限制了成型物件尺寸。直至 2015年Carbon3D公司開發出CLIP 技術，成功解決分離力的問題，並實現了連續列印的概念。本研究將採用類似CLIP原理之抑制材料聚合技術應用於DLP連續列印技術，而在列印的過程中發現成型物件截面逐漸產生層紋，進而導致列印的失敗，因此本研究的目的為探討連續列印過程中影響列印失敗的因素，進而改善高速列印成品的品質。
本研究分別以薄膜抑制材料消耗與樹脂聚合速率改變等失敗可能的因素進行分析，發現列印後樹脂的固化深度會受影響，並透過實驗驗證影響樹脂固化深度下降的因素為因抑制材料與自由基所產生的低活性自由基小分子。此外，若樹脂添加過量光起始劑濃度會產生大量自由基，進而影響死區厚度並導致列印失敗，且不同光起始劑濃度材料應配合適當的薄膜抑制材料濃度，並使低活性自由基小分子產生的量與被聚合物帶走的量達到平衡，得以改善樹脂對列印的影響，來提升連續列印成型物件的品質。

In the bottom-up mask projection stereolithography technique, the problem of separation force has been in-depth discussion because it greatly affects the printing speed and limits the design of the size and features of printed objects. Until Carbon 3D developed CLIP technology in 2015, it solved the separation force problem, also achieved the concept of continuous printing. This study will use inhibition of radical polymerization and apply to bottom-up DLP system, but we found some defects on the cross-section of the printed object, which led to the failure of printing. Therefore, the purpose of this study is to study on the factors of printing failure during printing process, and improve the quality of printed product in the high speed 3D printing.
In this study, we analyze the failure factors of inhibitor consumption and resin polymerization rate and found the curing depth of resin after printing was affected. The reason is low activity free radicals produced by inhibitor which affect the resin polymerization rate. In addition, if the resin is added with excessive photoinitiator, a large amount of free radicals will be generated, which will affect the thickness of the dead zone and cause printing failure, and different photoinitiator concentration should be match with appropriate inhibitor concentration. Also, the amount of low activity free radicals is balanced with the amount carried away by the polymer to solve the effect of the resin and improve the quality of the printed product.

[1] Wohlers, T. (2016). “Wohlers report 2016.” Wohlers Associates, Inc:4-5.
[2] 鄭正元，江卓培，林宗翰，林榮信，蘇威年，汪家昌，蔡明忠，賴維祥，鄭逸琳，洪基彬，2017年， “3D列印積層製造技術與應用” 全華圖書出版社。
[3] Gibson, I., Rosen, D. W., & Stucker, B. (2010). “Additive manufacturing technologies.” Vol. 238. New York: Springer.
[4] Kim, H.C., Yoon, H.R., Lee, I.H., Ko, T.J., (2012). “Exposure Time Variation Method Using DMD for Microstereolithography.” Journal of Advanced Mechanical Design, Systems, and Manufacturing 6(1):44-51.
[5] 王建國，2004，”高分子合成新技術”，化學工業出版社，第二章，p.79-121。
[6] 王德海，江櫺，2001，” 紫外光固化材料:理論與應用”，科學出版社，第二章，p.68-102。
[7] Zhou, C., Chen, Y., Yang, Z., Behrokh, K., (2019). “Digital Material Fabrication Using Mask-Image-Projectionbased Stereolithography.” Rapid Prototyping 19(3):65-153.
[8] Syao, K.C. (2016). “Stereolithography apparatus.” US Patent No. 9,452,567 B2.
[9] Huang, Y.M., Jiang, C.P., (2005). “On-line force monitoring of platform ascending rapid prototyping system.” Journal of materials processing technology 159(2):257-264.
[10] Jina, J., Yang, J.F., Mao, H.C., Chen, Y., (2017) “A vibration-assisted method to reduce separation force for stereolithography.” Journal of Manufacturing Processes 34:793-801
[11] Tumbleston, J.R., Shirvanyants, D., Ermoshkin, N., Janusziewicz, R., Johnson, A.R., Kelly, D., Samulski, E.T., (2015). “Continuous liquid interface production of 3D objects.” Science 347(6228):1349-1352.
[12] Quintanilla, A.L., Mecham, S.J., Desimone, J.M., Tumbleston, J.R., Janusziewicz, R., (2016). “Layerless fabrication with continuous liquid interface production” Proceeding of the National Academy of Sciences of the United States of America 113(42): 11703–11708.
[13] EnvisionTEC. https://envisiontec.com/
[14] Lian, Q., Yang, F., Xin, H., Li, D.C., (2017). “ Oxygen-controlled bottom-up mask-projection stereolithography for ceramic 3D printing.” Ceramics International 43(17):14956-14961.
[15] NewPro 3D. https://newpro3d.com/
[16] Nexa 3D. https://nexa3d.com/
[17] Sprybuild. http://www.sprybuild.com/
[18] 黃冠騰, 2018,”快速光固化懸浮式3D列印成型技術之研究”國立臺灣科技大學碩士論文