請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/83912
標題: | 粉末式3D列印之創新黏合程序 Innovative Binding Processes of Powder-bed 3D Printing |
作者: | Ting-Yu Cheng 鄭庭宇 |
指導教授: | 廖英志(Ying-Chih Liao) |
關鍵字: | 黏著劑噴塗型3D列印,澱粉糊化,粉體堆疊,液體混合,反應性液滴, Binder jetting 3D printing,starch gelatinization,powder stacking,liquid mixing,reactive inks, |
出版年 : | 2022 |
學位: | 博士 |
摘要: | 近年來,3D列印技術受到相當多關注,由於3D列印技術無須事先生產模具,可簡化製造程序、降低製作成本、減少材料浪費,常被應用在客製化製造、快速建模、航太引擎生產、藝術品創作中。黏著劑噴塗型3D列印,Binder-jetting 3D printing (又稱粉末式3D列印,Powder-bed 3D printing)的特色在於列印時可使用自材支撐,不須另物設計支撐結構,因此可以列印較為複雜的結構。另外,此技術也是少數可以列印全彩物件的技術,透過將彩色墨水添加於黏著劑中,列印過程中便可以透過CMYK的組合來噴塗彩色的成品。黏著劑噴塗型3D列印之成品由於孔隙較大,因此其機械強度較低,通常需要經過耗時的後處理程序,將成品浸潤到樹脂內並利用光或熱進行固化才能得到足夠的強度。因此本文將發展新的列印程序來縮短以及簡化此技術的製作時間,同時得到高強度的成品。 本研究中,開發了兩種嶄新的列印系統,以縮短或免去傳統粉末式3D列印中耗時的後處理程序。在第2章中,本研究中使用澱粉之糊化特性,配合微波的均勻快速加熱,發展出嶄新且迅速的後處理程序。在第3章、第4章開發反應性印刷噴墨的粉末式3D列印技術。在第3章中,透過計算流體力學提出使多成分液體在粉末床中混合效果大幅上升的策略,而在第4章當中,利用粉末式3D印表機的多噴頭,同時噴塗多種反應性墨水於石膏粉末床中,使成型過程中同時進行交聯黏合,不需要後處理便能得到高強度物件。此外,噴塗的墨水也能使粉體進行進一步的功能化反應。 最後,在第5章當中總結了本研究的成果,並對黏著劑噴塗成型3D列印的創新黏合程序進行評估。未來可應用於快速成型、牙模與醫療材料的商業化製造。 In recent years, 3D printing technology has received considerable attention. 3D printing technology can skip the molding process and has the advantages of simpler manufacturing procedure, lower cost, and reducing material waste. It is often used in customized manufacturing, rapid modeling, aerospace engine production, and art creation. Binder jetting 3D printing (also known as powder-bed 3D printing) is one of the few technologies that can print full color objects. The binder-jetting 3D printing products have low mechanical strength due to their large porosity, and usually require the time-consuming post-treatment to soak the green product into the resin and cure it with light or heat. Therefore, this study develops novel methods to reduce the manufacturing time, to simplify the processes, and to obtain high strength objects. In this study, two novel printing systems were developed to shorten or eliminate the time-consuming post-processing process in traditional powder-based 3D printing. In Chapter 2, a new and rapid post-processing process is developed using the gelatinization characteristic of starch with uniform and rapid microwave heating. In Chapters 3 and 4, a reactive binder jetting 3D printing technology is developed. In Chapter 3, a strategy to increase the mixing effect of multi-component liquids in the powder bed is proposed by calculating fluid mechanics, and in Chapter 4, the multiple nozzles of the binder-jetting 3D printer are used to simultaneously spray multiple reactive inks into the gypsum powder bed, allowing cross-linking and bonding during the molding process, resulting in high-strength objects without post-processing. In addition, the sprayed inks also enable further functionalization of the powder. Finally, in chapter 5, we conclude and summarize the achievements of this research. The innovative binding process of powder-bed 3D printing is evaluated and can be applied to business development of rapid prototyping, dental and medical applications in the future. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/83912 |
DOI: | 10.6342/NTU202201353 |
全文授權: | 未授權 |
顯示於系所單位: | 化學工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
U0001-0807202216081800.pdf 目前未授權公開取用 | 9.03 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。