A fused deposition modeling (FDM) is widely used as a 3D printing method of plastics (polymeric materials). However, modeling of soft materials is conventionally quite difficult using such method although 3D printing of plastics and/or elastomers is required for medical application such as manufacturing of prosthetic arms and legs. In this study, we investigated the optimum 3D printing conditions for modeling of spherical objects made with FABRIAL-R and -H (JSR corp.). First, we 3D printed spherical objects with various nozzle speeds. Then, we observed the surfaces of 3D printed objects using a stereoscopic microscope. In addition, the hardness of the objects was measured by using a durometer (type E, Japanese Industrial Standards). The results suggest that optimum nozzle speed is 2.0 mm/s or less. Furthremore, the hardness of FABRIAL-R object was dependent on nozzle speed while that of FABRIAL-H was constant. These findings are expected to be applied to modeling of parts of prosthetic arms and soft-matter robots.
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机译：融合沉积建模（FDM）广泛用作塑料（聚合物材料）的3D打印方法。然而，使用这种方法，软材料的建模通常很困难，尽管医学应用需要塑料和/或弹性体需要3D打印，例如假肢臂和腿的制造。在这项研究中，我们研究了用于建模用Fabrial-R和-H（JSR Corp.）制备的球形物体的最佳3D打印条件。首先，我们3D具有各种喷嘴速度的印刷球形物体。然后，我们使用立体显微镜观察了3D印刷物体的表面。此外，通过使用硬度计（E型，日本工业标准）测量物体的硬度。结果表明，最佳喷嘴速度为2.0 mm / s或更少。 Futthemore，Fabrial-R物体的硬度依赖于喷嘴速度，而Fabrial-H的恒定。这些发现预计将应用于对假肢和柔软物质机器人的部分建模。
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