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The Effect of Binder Loading on the Pore Size of 3D Printed PMMA

机译:粘合剂加载对3D印刷PMMA孔径的影响

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摘要

Binder jetting is known to produce porous objects by depositing the binder selectively layer by layer on a powder bed. In this study, the pore size of printed parts and the correlating mechanical properties are investigated on a commercially available PMMA powder binder system. Pore sizes are measured via capillary flow porometry and mechanical properties via tensile tests. Porometry indicates that the pore size stays at a constant level of 22 µm at 5 to 10 wt% binder loading before decreasing to 6 µm at loadings of 30 wt% or higher. The results were compared with the mechanical testing and related to the agglomerate strength model of Rumpf. The highlights of the article are the application of a binder jetted part as a filter and the identification of a close relationship between porosity and mechanical strength, similar to phenomena in agglomeration science.
机译:已知粘合剂喷射通过在粉末床上选择性层选择性层选择粘合剂来产生多孔物体。在该研究中,在市售的PMMA粉末粘合剂系统上研究了印刷部件的孔径和相关机械性能。通过拉伸试验通过毛细管流动孔径和机械性能测量孔径。孔径术表明,在5至10wt%粘合剂负载下,孔径在22μm的恒定水平下,在30wt%或更高的载荷下降至6μm。将结果与机械测试进行比较,与臀部的附聚强度模型进行比较。本文的亮点是将粘合剂喷射部分作为过滤器的应用,并且识别孔隙率和机械强度之间的密切关系,类似于集聚科学的现象。

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