模型引导的分层与连续相结合的 3D 打印
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北京市教育委员会科技计划重点项目(KZ202110005007)

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Model-guided 3D Printing Combining Continuous and Layer-wise Manufacturing
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Beijing Municipal Education Committee Science Foundation (KZ202110005007)

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    摘要:

    在面曝光连续 3D 打印中,由于在有限的时间内,树脂填充距离有限,因此,打印实心结构过程中容易因为树脂填充不足而导致打印失败,连续成型适用于镂空结构或者薄片结构。另外,由于存在润滑液流失,基于浸泡润滑液的聚二甲基硅氧烷膜的连续打印高度受限。针对上述问题,该文提出了一种在模型引导下分层打印和连续打印相结合的数字光处理技术 3D 打印方案。该方案采用具有一定厚度、密度大于树脂且不与树脂混溶的氟化油(又称润滑液)形成打印平面,大大降低了成型物体和打印平面的粘附力,并进一步实验估计了液液界面下的最大可填充距离和最佳提升高度。基于最大可填充距离,结合模型切片的最小-最大距离,实现连续打印和分层打印的有机结合。此外,基于最佳提升高度,结合模型分析,保证了分层打印下平台提升高度最优。实验结果表明,该方案打印模型高度不受润滑液限制,且对于实心结构和镂空结构的模型都有较好的打印效果。与传统的分层打印方案相比,该方案大大提升了打印效率。

    Abstract:

    In continuous mask projection 3D printing, due to the limited resin filling distance in a limited time, continuous forming is suitable for hollow structure or sheet structure. For the solid structures it is easy to fail in printing due to the insufficient resin filling in the process of printing. In addition, continuous printing based on ploydimethylsiloxane (PDMS) film soaked in lubricating fluid has limited printable height due to the loss of lubricating fluid in the printing process. To solve the above problems, a model guided 3D printing scheme combining layer-wise and continuous printing is proposed. The printing plane is formed by a certain thickness of fluorinated oil (also known as lubricating fluid) with a density greater than the resin and immiscible with the resin, which greatly reduces the adhesion between the printed object and the forming plane. Furthermore, experiments are designed to estimate the Maximum Filling Distance (MFD) and the Optimal Lifting Height (OLH) under the liquid-liquid interface. Based on MFD, combined with the Minimum-Maximum Distance (DisMax-Min) of model slices, the continuous printing and layer-wise printing are effectively connected. Based on OLH, with model analysis, the optimal lifting height of the platform could be estimated for layer-wise printing. The experimental results demonstrate that the proposed scheme can print the model height without restriction by lubrication fluid , and it can print the models of both solid and hollow structures. Compared with the traditional layer-wise printing scheme, the proposed method is more efficient.

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引文格式
李言东,毋立芳,崔可建,等.模型引导的分层与连续相结合的 3D 打印 [J].集成技术,2022,11(1):88-96

Citing format
LI Yandong, WU Lifang, CUI Kejian, et al. Model-guided 3D Printing Combining Continuous and Layer-wise Manufacturing[J]. Journal of Integration Technology,2022,11(1):88-96

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  • 在线发布日期: 2022-01-21
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