基于刨切策略的纸基彩色3D打印提速方法

Speedup Method of Paper-Based 3D Color Printing Based on Slicing Strategies

为了改善纸基类彩色3D打印技术产业化所面临的打印周期长问题,利用现有的STL文件几何信息,提出了一种新的基于刨切策略的快速稳定着色算法。利用分层后的3D数据模型中切层斜率D值的正负来判定着色面,并采用改进型着色油墨进行选择性单面着色替换双面着色来实现打印提速。结果表明,在给定的3D彩色模型中,从上至下刨切法、从下至上刨切法、正公差刨切法、负公差刨切法4种常用刨切策略提速效率指数Es都高于0.5,其中负公差刨切法的提速效果最明显。由此可知,在现有耗材和设备的基础上,纸张着色判定的正面优先简化模型,能够低成本地提高纸基彩色3D打印速度。

To optimize the issue of long printing cycle which is in the way of the industrialization of paper-based 3D printing, a new fast and reliable coloration algorithm based on slicing strategies was proposed by using geometric informa- tion in STL files. The layer coloring surface is determined by D value that represented the positive or negative slope of layer in the 3D model after slicing, and colored with advanced inks to print single-sided instead of two-sided to accelerate the printing speed. According to the given 3D models, based on four slicing strategies including top-down slicing, bottom-up slicing, positive tolerance slicing and negative tolerance slicing, their coefficients of speedup scale were introduced and calculated; those Es values were all bigger than 0.5, and the Es value of negative tolerance method was the biggest. Therefore, this new algorithm based on existing materials and apparatus provided a lower-cost method to decrease the printing cycle of paper-based 3D color printing within the case of simple model.