下照式DLP型3D列印技術在高速列印較大截面積時，因樹脂的黏滯性與表面張力，若z軸抬升微小層厚則樹脂常無法順利回流至列印區域，導致列印成品表面產生缺陷與列印失敗。本研究擬透過提升列印中樹脂的流動之策略探討，改善高速列印大截面積樹脂回流之問題。
本研究安裝荷重元儀器於z軸上，讀取列印過程中z軸受力之波形，觀察高速列印不同截面積時樹脂回流不完全所對應之波形，發現當截面積與層厚之比值大於700cm，易產生大截面積樹脂回流問題。將透過兩種策略來提高樹脂的流動速度以改善回流問題。一為抬升時結合成型平台旋轉的方式，探討四種組合之效果，透過荷重元之波形分析選擇出適合的模式為邊上升邊旋轉，並在此模式下觀察不同旋轉速度、角度之影響。另一策略為在樹脂槽底部設計漩渦狀溝槽微結構，引導樹脂以輔助回流，結果顯示樹脂能有效回流至列印區域。搭配適合的旋轉模式，可成功列印物件至截面積與層厚比值為2826cm之大截面積實心物件。

In the DLP-type high speed 3D printing, due to the viscosity and surface tension of the resin, the resin often encountered refilling issue if large cross-sectional areas were printed with limited rise of z-axis, resulting in printing defects and at worst printing failure.
In this study, a load cell instrument was installed on the z-axis to read the z-axis force during the printing process, and observe the waveforms corresponding to the incomplete resin refill during high-speed printing with different cross-sectional areas. It was found that when the ratio of cross-sectional area to layer thickness was greater than 700 cm, easy it tends to produce large cross-sectional area resin refill problem. Two strategies will be adopted to increase the flow rate of the resin to improve solve the problem. The first is to combine the rotation of the platform when lifting, and explore the effects of the four combinations. Through the waveform analysis, the appropriate viable mode is selected as the rotation while rising, and the effects of different rotation speeds and angles are observed in this mode. Another strategy is to design a spiral groove microstructure at the bottom of the resin tank to guide the resin to refill. The results show that with a suitable rotation mode, the object can be successfully printed to a large cross-sectional area with a cross-sectional area to layer thickness ratio of 2826 cm.

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