Anisotropy of Photopolymer Parts Made by Digital Light Processing.
Anisotropy of Photopolymer Parts Made by Digital Light Processing.
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DOI：
10.3390/ma10010064
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发表时间：
2017-01-13
期刊：
影响因子：
--
通讯作者：
Ortega F
中科院分区：
文献类型：
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作者：
Monzón M;Ortega Z;Hernández A;Paz R;Ortega F
数字光处理（DLP）是一种精确的增材制造（AM）技术，适用于通过光聚合生产微型零件。与大多数AM技术一样，DLP制造的零件的各向异性是一个需要处理的关键问题，考虑到几个操作因素会改变这一特性。这种技术和光聚合物的设计成为一个挑战，因为制造过程和后处理强烈影响零件的机械性能。本文展示了实验工作，以证明使用DLP制成的零件的特定行为。与任何其他AM技术不同，设计规则需要适应。根据完全固化树脂和部分固化树脂形成的双材料部件的实验数据和理论模拟，报告和证明了构建方向和后固化工艺对最终力学性能和各向异性的影响。在不同的工作条件下测试了三种光敏聚合物，得出结论，后固化可以，在某些情况下，纠正各向异性，主要取决于光敏聚合物的性质。
Digital light processing (DLP) is an accurate additive manufacturing (AM) technology suitable for producing micro-parts by photopolymerization. As most AM technologies, anisotropy of parts made by DLP is a key issue to deal with, taking into account that several operational factors modify this characteristic. Design for this technology and photopolymers becomes a challenge because the manufacturing process and post-processing strongly influence the mechanical properties of the part. This paper shows experimental work to demonstrate the particular behavior of parts made using DLP. Being different to any other AM technology, rules for design need to be adapted. Influence of build direction and post-curing process on final mechanical properties and anisotropy are reported and justified based on experimental data and theoretical simulation of bi-material parts formed by fully-cured resin and partially-cured resin. Three photopolymers were tested under different working conditions, concluding that post-curing can, in some cases, correct the anisotropy, mainly depending on the nature of photopolymer.