探索 3D 打印腕手矫形器的新型材料和方法

IF 3.3 Q2 ENGINEERING, MANUFACTURING
Diana Popescu, Mariana Cristiana Iacob, C. Tarbă, D. Laptoiu, C. Cotruț
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引用次数: 0

摘要

本文提出将两个新方面整合到 3D 打印定制腕手矫形器的生产中。一个方面涉及材料,特别是含有活性发泡剂的Colorfabb varioShore热塑性聚氨酯(TPU)长丝,它可以通过打印温度等工艺参数调整3D打印矫形器的机械性能。因此,在同一打印工艺中,通过使用单个挤出喷嘴,可以生产出不同硬度的矫形器,既能达到固定的刚性,又能达到舒适的柔软性。利用这种能力,可以通过基于材料挤压的增材制造技术,将矫形器三维打印成扁平形状,这也是另一个新颖之处。随后,矫形器在固定后与用户的上肢形状相吻合,如果是双材料解决方案,则通过热成型来实现。与需要工程专业知识和三维扫描数据处理的三维扫描和建模方法不同,我们还提出了一种专用的设计网络应用程序,它依赖于关键的患者手部测量输入。在对不同设计的 varioShore TPU 矫正器进行评估时,将打印时间、成本、最大屈曲角度、舒适度和腕部稳定性作为评估标准。由于部分已生产的热塑性聚氨酯矫形器缺乏必要的腕部刚度,或不能很好地贴合手掌形状,因此对包含不同尺寸聚乳酸(PLA)插入物的双材料矫形器进行了三维打印和评估,结果显示腕部刚度得到改善,手掌形状也更加贴合。研究结果表明,这种创新方法可以利用各种特性(如变体海岸特性、聚乳酸热成型能力以及增材制造技术提供的设计灵活性)制造出双材料上肢矫形器。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploring a Novel Material and Approach in 3D-Printed Wrist-Hand Orthoses
This article proposes the integration of two novel aspects into the production of 3D-printed customized wrist-hand orthoses. One aspect involves the material, particularly Colorfabb varioShore thermoplastic polyurethane (TPU) filament with an active foaming agent, which allows adjusting the 3D-printed orthoses’ mechanical properties via process parameters such as printing temperature. Consequently, within the same printing process, by using a single extrusion nozzle, orthoses with varying stiffness levels can be produced, aiming at both immobilization rigidity and skin-comfortable softness. This capability is harnessed by 3D-printing the orthosis in a flat shape via material extrusion-based additive manufacturing, which represents the other novel aspect. Subsequently, the orthosis conforms to the user’s upper limb shape after secure attachment, or by thermoforming in the case of a bi-material solution. A dedicated design web app, which relies on key patient hand measurement input, is also proposed, differing from the 3D scanning and modeling approach that requires engineering expertise and 3D scan data processing. The evaluation of varioShore TPU orthoses with diverse designs was conducted considering printing time, cost, maximum flexion angle, comfort, and perceived wrist stability as criteria. As some of the produced TPU orthoses lacked the necessary stiffness around the wrist or did not properly fit the palm shape, bi-material orthoses including polylactic acid (PLA) inserts of varying sizes were 3D-printed and assessed, showing an improved stiffness around the wrist and a better hand shape conformity. The findings demonstrated the potential of this innovative approach in creating bi-material upper limb orthoses, capitalizing on various characteristics such as varioShore properties, PLA thermoforming capabilities, and the design flexibility provided by additive manufacturing technology.
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来源期刊
Journal of Manufacturing and Materials Processing
Journal of Manufacturing and Materials Processing Engineering-Industrial and Manufacturing Engineering
CiteScore
5.10
自引率
6.20%
发文量
129
审稿时长
11 weeks
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