| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 105 === After the expiration of the patent of photopolymerization, the world's academic units and enterprises are actively involved in the development and production. However, there still is one issue we have to solve, Separation force, to bring "bottom up" type Vat polymerization technology to the real application and production. Although the past research in this laboratory has greatly improved the separation force of 3D printing, still can not make zero separation technology to achieve the goal of continuous printing.
So far, Silicon Valley's Carbon3D company developed CLIP technology (Continuous Liquid Interface Production), the perfect solution to the separation force problem. The principle is that oxygen is able to inhibit free radical photopolymerization reactions, and liquid resin at the bottom of the resin tank due to contact with oxygen will maintain stable liquid. Therefore, you can achieve the concept of continuous printing. This study will use a similar concept, an electric field or magnetic field is built around the cationic resin. By controlling the electric or magnetic field strength, the super proton acid from the cationic resin will leave the bottom of the resin tank. Thus, the cationic polymerization reaction at the bottom is inhibited and maintains a stable liquid to achieve zero separation force. The results show that the separation force can be effectively reduced and the integrity of the printed part can be improved. Looking to the future this study will help the 3D printing industry to overcome the current printing speed limit, to further enhance the penetration of the 3D printing industry.
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