DLP列印單層厚度控制探討

Abstract

在光固化積層製造中，適當的單層固化厚度影響了整體結構的穩定度與外觀，尤其是桁架結構。如果單層固化厚度不足，易造成鏤空空結構不穩定；相反的，過度單層固化厚度，會導致鏤空結構，變成實心之立方體。因此，在列印過程中，除了會以列印載台的步進量控制樹酯流入載台的厚度外，同時也要避免，因為光能量穿透所導致深度方向多餘的固化。 本研究係在探討如何運用調整樹酯配方、降低曝光能量、改變給予光能量的方式……等方式，精確地控制光敏樹酯固化厚度。先以列印單層的方式，找出若干變因與層厚之間的理論關係，接著將這些方法實際運用於鏤空結構列印 ― 井字結構。藉由量測結構中的鏤空樓板厚度，觀察是否有改善吊床現象。

In the manufacture of vat polymerization, the appropriate single-layer curing thickness affects the stability and appearance of the whole structure, especially the truss structure. If the single-layer curing thickness is insufficient, it will easily cause the hollow structure to be unstable; on the contrary, if the single-layer curing thickness is too high, the hollow structure will become a solid cube. Therefore, in the process, in addition to controlling the thickness of the resin flowing into the printing carrier by the moving amount of the printing carrier, it is also necessary to avoid excess curing in the depth direction due to the penetration of light energy. The purpose of this study is to explore how to use methods of adjusting the resin formula, reducing the exposure energy, changing the way of light energy, etc., to precisely control the curing thickness of the photosensitive resin. First, by printing a single layer, find out the theoretical relationship between several variations and layer thickness, and then apply these methods to the hollow structure - the Tac-toe structure. By measuring the thickness of the hollow floor slab in the structure, observe whether the hammock phenomenon has been improved.