Development of Preparation System for Continuous Carbon Fiber Filament in Composite 3D Printing

• Main Authors: Liang-Yu Chen, 陳亮瑜
• Other Authors: Yih-Lin Cheng
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/whae32

碩士 === 國立臺灣科技大學 === 機械工程系 === 107 === Nowadays, the continuous fiber reinforced thermoplastic composite in the composite 3D printing technology is stable and fully developed, but its reinforcing effect still cannot replace the traditional FRP composite application. Therefore, in order to meet the needs in industrial composite application, in my research continuous carbon fiber and dual-cure epoxy resin were selected to develop a 3D printing composite extrusion module for 2-stage printing process. However, the uneven mixing of fiber and matrix were found before the material was extruded, it would lead to the generation of voids inside. Therefore, this study developed a continuous carbon fiber preparation system to improve the fiber and matrix impregnated effect. In this study, the appropriate viscosity photocurable matrix was used to prepare filaments, then compared with unused and used of the continuous carbon fiber preparation system, it was found that the matrix content was influenced through different mold sizes. Then, according to the results of Optical Microscope and Scanning Electron Microscope analysis, we found the matrix was effectively penetrated into the interior of fiber. In addition, the filament prepared through different K number of fiber which need to match appropriate mold size, and the filament had a uniform distribution of matrix when the fiber cross-section area occupied by the mold was about 60%. Furthermore, through the three-point bending test, the strength of the 12K carbon fiber prepared by using the preparation system can be improved by 67%.