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首页> 美国卫生研究院文献>Materials >Three-Dimensional Printing of Continuous Flax Fiber-Reinforced Thermoplastic Composites by Five-Axis Machine
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Three-Dimensional Printing of Continuous Flax Fiber-Reinforced Thermoplastic Composites by Five-Axis Machine

机译：五轴机器对连续亚麻纤维增强热塑性复合材料进行三维打印

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摘要

A method for printing continuous flax fiber-reinforced plastic (CFFRP) composite parts by five-axis three-dimensional (3D) printer, based on fused filament fabrication (FFF) technology, has been developed. FFF printed parts usually need supporting structures, have a stair step effect, and unfavorable mechanical properties. In order to address these deficiencies, continuous natural fiber prepreg filaments were first manufactured, followed by curved path planning for the model for generation of the G-code, and finally printed by a five-axis 3D printer. The surface quality of printed parts was greatly improved. The tensile strength and modulus of CFFRP increased by 89% and 73%, respectively, compared with polylactic acid (PLA) filaments. The flexural strength and modulus of the 3D-printed CFFRP specimens increased by 211% and 224%, respectively, compared with PLA specimens. The maximal curved bending force load and stiffness of the 3D-printed CFFRP specimens increased by 39% and 115%, respectively, compared with the flat slicing method. Advanced light structures, such as leaf springs, can be designed and manufactured by taking advantage of the favorable properties of these composites, which endow them with significant potential for application in the field of automobiles.
机译：基于熔融长丝制造（FFF）技术，开发了一种通过五轴三维（3D）打印机打印连续亚麻纤维增强塑料（CFFRP）复合零件的方法。 FFF印刷零件通常需要支撑结构，具有阶梯效应，并且不利的机械性能。为了解决这些缺陷，首先制造了连续的天然纤维预浸料长丝，然后为生成G代码的模型进行了弯曲路径规划，最后通过五轴3D打印机进行打印。印刷零件的表面质量大大提高。与聚乳酸（PLA）丝相比，CFFRP的拉伸强度和模量分别增加了89％和73％。与PLA样本相比，3D打印的CFFRP样本的抗弯强度和模量分别增加了211％和224％。与平面切片法相比，3D打印的CFFRP试样的最大弯曲弯曲力载荷和刚度分别增加了39％和115％。可以通过利用这些复合材料的良好性能来设计和制造先进的轻型结构，例如板簧，这赋予了它们在汽车领域的巨大潜力。

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