研究生: |
林政穎 Zheng-Ying Lin |
---|---|
論文名稱: |
複合熱泡噴印與粉床熔融3D列印機台研發 Research and Development of Fusion agent printed by Thermal bubble nozzle and Hybrid of Powder bed fusion 3D printer |
指導教授: |
鄭正元
Jeng-Ywan Jeng |
口試委員: |
謝志華
Zhi-Hua Xie 葉雲鵬 Yun-Peng Ye |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 機械工程系 Department of Mechanical Engineering |
論文出版年: | 2020 |
畢業學年度: | 108 |
語文別: | 中文 |
論文頁數: | 69 |
中文關鍵詞: | 粉末床列印 、碳黑熔融劑 、熱塑性聚胺酯 |
外文關鍵詞: | TPU, Fusion agent printed, Powder bed fusion |
相關次數: | 點閱:521 下載:0 |
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3D列印技術近年來已經顯著增長,並且已開始改變飛機、汽車、建築製造領域。此技術在商業上可獲得的主要優點為,減低機器成本和建構速度。本文介紹了一種稱為高速3D碳黑熔融燒結的新技術之初步研究。該過程類似於選擇性激光燒結 (SLS) 與多射流融合技術 (MJF),然而,不是由雷射決定每層的燒結橫截面積,而是使用碳黑熔融劑與紅外線燈管加熱決定,首先使用碳黑熔融劑材料印刷所需區域,然後使用紅外光燈管高速燒結熱塑性聚胺脂 (TPU) 粉末,在不需要雷射的情況下,能夠燒結粉末層的2D輪廓。實驗顯示如何將熱塑性聚胺脂粉末中,添加碳黑熔融劑使粉末完全燒結,使用紅外燈在數秒之內燒結整個層,並且在之後進行材料成品性質測試。
列印過程中熱控制是至關重要的,所以使用PID溫度控制系統,因為TPU熔融反應需要較長時間,所以燒熔列印需要使溫度達到目標時能夠維持溫度,使成品不會因為燒結時間不足,使粉末未完全結合,或是超過反應溫度而產生翹曲現象,列印完成後,材料經由燒結後處理提升機械強度效果,消除雷射頭降低了機器成本和列印時間,建造時間結合這些因素將使碳黑熔融劑燒結技術適合大批量生產。
本研究會進行熱泡式射流3D列印TPU的可行性測試,並架設熱像儀設備觀測列印時燒結的狀態,以判斷溫度控制系統的設計是否得宜,最後列印拉伸試片做機械性質測試,判斷熱泡式射流3D列印TPU的機械強度。
3D printing technology has grown significantly in recent years and has begun to transform the fields of aircraft, automotive, and construction manufacturing. The main commercial advantages of this technology are reduced machine cost and construction speed. This paper introduces a preliminary study of a new technology called high-speed 3D carbon black melt sintering. This process is similar to selective laser sintering (SLS) and multi-jet fusion technology (MJF). However, instead of determining the sintered cross-sectional area of each layer by laser, it is determined by the use of carbon black flux and infrared lamp heating. The carbon black flux material is used to print the required area, and then the infrared light tube is used to sinter the thermoplastic polyurethane (TPU) powder at high speed, which can sinter the 2D contour of the powder layer without the need of laser. Experiments show how to add a carbon black flux to the thermoplastic polyurethane powder to completely sinter the powder, use an infrared lamp to sinter the entire layer in seconds, and then test the properties of the finished material afterwards.
Thermal control is very important during printing, so PID temperature control system is used, because TPU melting reaction takes a long time, so melting printing needs to maintain the temperature when the temperature reaches the target, so that the finished product will not be affected by sintering time. Insufficient, the powder is not fully combined, or the phenomenon of warping occurs when the reaction temperature is exceeded. After printing is completed, the material improves the mechanical strength effect by sintering after processing, eliminating the laser head, reducing the machine cost and printing time, and combining the construction time These factors will make carbon black flux sintering technology suitable for mass production.
In this research, the feasibility test of thermal bubble jet 3D printing TPU will be performed, and thermal imaging equipment will be set up to observe the sintering state during printing to determine whether the design of the temperature control system is appropriate. Finally, the tensile test piece is printed as a machine. Property test to judge the mechanical strength of thermal bubble jet 3D printing TPU.
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