面成型光固化方法研究

A novel plane prototyping method based on stereolithography

阐述了一种面成型的光固化成型加工方法,系统采用普通紫外光作为成型光源,它的频谱可以与光敏树脂的吸收频谱匹配,从而固化树脂材料。紫外光经过椭球反射镜的反射后,汇聚到聚光透镜的焦点位置,并且通过透镜产生平行的紫外光束。成型零件的截面特征是由位于光敏树脂上方的掩模产生的,通过对比实验F46薄膜、聚四氟乙烯薄膜、THV610薄膜、聚酯薄膜、石英玻璃、有机玻璃等掩模材料对于紫外光的透射率,证实几种塑料薄膜的紫外光透射率差别不大。在临界光学系统下进行的工艺实验结果表明,该成型方式能大幅提高零件的成型速度,是一种有效的成型方法。

It systematically discusses a new Stereolithography method with plane prototyping. The apparatus adopts UV light as light source, which is used to cure the resin and whose spectral band can prettily match with the absorption spectra of the resin. The UV light converges on the focus spot of the lens after reflecting from the ellipsoid surface, and then produces parallel UV light through the lens. The sectional characteristics of the prototyping parts are engendered with the mask above the resin. After contrasting and analyzing the F46, Teflon, THV610, polyester, quartz glass and PMMAfilms, it verifies that there is no more difference in UV transmittance ratio among the various materials. The experiments under the critical optical system demonstrate that the method is feasible and efficient and it can speed up the prototyping process greatly.