变速光固化连续液面成型方法

Variable Speed Stereolithography Continuous Liquid Interface Production Method

连续液面成型工艺(Continuous Liquid Interface production,CLIP)自问世以来就以其惊人成型效率和良好的加工质量,在光固化快速成型领域备受瞩目。但是,树脂的流动性能和固化性能共同影响着工件的成型速度。横截面较大部分的成型速度受到树脂流动速度的限制,而横截面较小的部分主要受到树脂固化速度的限制。因此,针对上述问题,提出一种基于工件模型信息的变速运动方案,并通过对掩膜图像进行灰度处理,改变投影机辐照度,使工件达到最佳固化精度。实验结果表明利用该方法,在保证精度情况下,能最大程度兼顾树脂流动性和固化性能,实现更大成型效率。

Continuous liquid interface production(CLIP)technology has attracted great attention in the filed of stereolithogra-phy since it came into being due to amazing processing efficiency and good processing quality.However,the flow properties and the curing properties of the resin together affect the processing speed.In the larger cross section of the part,the processing speed is limited by resin flow properties while in the smaller cross section of the part,the processing speed is limited by resin curing properties.Therefore,regarding the issue above,a variable-speed motion scheme based on part model information are proposed,which through the grayscale processing of the mask image,changes the irradiance of the projector to achieve the best curing accuracy of the part.The test results show that this method can maximize the balance between flowability and curing properties of resin and ensure maximum printing efficiency without sacrificing accuracy.