New美国军队研究产生了一种新的多聚合物丝，旨在与低成本FFF 3D打印机一起使用。雷电竞app下载高强度灯丝有望在战场上有助于及时产生任务关键部分，而传统零件成本的一小部分。该研究在四月版的封面上介绍高级工程材料。
Multi-thermoplastic filament
FFF is the most common 3D printing technology in use today due to its low barrier to entry and relatively low cost. Parts created using FFF tend to lack mechanical strength however, so their use in high-stakes field operations where they are subjected to the rigors of combat is generally advised against. The U.S. Army’s research aims to overcome the limitations of readily-available filament, instead creating something as robust as the warfighters who will use it.
研究人员合并了ABS和聚碳酸酯（PC），以制定其新型细丝。使用3D打印机来创建固体预形式，该预形式由较低温度的ABS壳和较高温度的星形PC芯组成。然后，使用热拉动塔将固体预形式通过直径和张力传感器喂养，从而将其转换回灯丝。新绘制的灯丝被回收为原料，但这一次是ABS和PC的混合物，赋予其出色的机械性能。为了完成该过程，将新灯丝打印的零件在烤箱中退火24-48小时，以将层完全融合在一起，从而增加了额外的结构完整性。
3D打印的部件从热室中出来，具有与注射量的ABS零件相当的功能，而断裂韧性值比相同的ABS几何形状高1500％（15倍）。研究人员得出的结论是，PC输注有助于抵抗热诱导的蠕变，并在退火过程中保持精确的部分尺寸。团队希望将退火时间降低到未来的四个小时或更短的时间。
雷电竞充值场上的增材制造
Dr Eric Wetzel, co-author of the study, states that the Army is looking to print parts in the field to simplify logistics. By carrying digital files and raw materials, the need to lug around excessive physical parts would be eliminated. Unfortunately, the technologies for 3D printing high-strength parts have not been practical in an expeditionary setting to date. The printers are too large, require too much energy to operate, are fairly delicate in their builds, and their feedstocks require specialized storage conditions.
Jeff Wallace, a mechanical engineer with the Army’s C5ISR Center at APG, adds, “Having the option to additively manufacture parts from a high strength polymer via the FFF process, at the field, division, and/or depot level will certainly provide warfighters with the ability to produce better temporary parts much quicker – hours versus days or weeks – and at significantly lower costs – often pennies compared to tens of dollars.”
华莱士总结说：“此外，士兵倾向于根据需要即兴创作，经常找到自己面临的问题的设计解决方案。因此，为他们提供更高的强度聚合物材料，可以在他们可以使用的台式打印机中使用，为他们提供机会to innovate on-the-fly, as necessary to temporarily solve greater numbers of supply and design challenges. Their designs would then be sent to the proper Engineering Support Activity for evaluation.”
该研究的更多细节可以在标题为“”的论文中找到用双热塑料制造的坚固，添加性制造的结构’。它由凯文·哈特（Kevin Hart），瑞安·邓恩（Ryan Dunn）和埃里克·韦泽尔（Eric Wetzel）合着。
美国武装部队有使用增材制造业的历史，并为其现场运营进行研究。雷电竞充值今年早些时候he U.S. Army announced that it was working towardsdeveloping its supply chain支持添加剂制造的集成。雷电竞充值最近，军队开始与University of Delaware到3D打印high temperature composites using a Roboze ARGO 500 3D printer。
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特色的图像节目过程3D打印了预形式并绘制灯丝。通过美国陆军的图像。
