采用先进的层内固化方法,经济高效地三维打印硅树脂结构

Cormac D. Fay, Liang Wu
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引用次数: 0

摘要

我们介绍了一种先进的低成本三维打印系统,它能够使用市场上现成的材料制造复杂的硅胶结构。我们的系统使用了一个定制设计的电动注射泵,该泵带有一个驱动前导螺杆,能很好地控制材料挤出,以适应硅胶打印墨水的高粘度,该墨水由聚二甲基硅氧烷(PDMS)、稀释剂和光引发剂(LAP)组成。我们改装了一台开源桌面 3D 打印机以安装注射泵,并对其进行编程,以逐层沉积受控的复杂图案。为确保打印对象的结构完整性,我们引入了层内固化方法,使用定制的紫外线固化系统将沉积层熔化。我们的实验证明,我们成功地制造出了不同填充百分比的硅胶结构,并具有出色的分辨率和机械性能。我们的低成本解决方案(成本不到 1000 美元,不需要专门的设施或设备)在微流体、假肢和生物医学工程等领域的实际应用前景十分广阔,我们的初步研究结果表明,该解决方案具有 300 μm 宽度的通道(在需要的情况下还可以制作更小的通道)和可调的结构特性。我们的工作代表了低成本桌面三维打印能力的重大进步,我们预计它将为没有能力购买昂贵制造系统的学者提供这些能力,从而对该领域产生广泛影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cost-Effective 3D Printing of Silicone Structures Using an Advanced Intra-Layer Curing Approach
We present an advanced, low-cost 3D printing system capable of fabricating intricate silicone structures using commercially available off-the-shelf materials. Our system used a custom-designed, motorised syringe pump with a driving lead screw and excellent control of material extrusion to accommodate the high viscosity of silicone printing ink, which is composed of polydimethylsiloxane (PDMS), diluent, and a photo-initiator (LAP). We modified an open-source desktop 3D printer to mount the syringe pump and programmed it to deposit controlled intricate patterns in a layer-by-layer fashion. To ensure the structural integrity of the printed objects, we introduced an intra-layer curing approach that fused the deposited layers using a custom-built UV curing system. Our experiments demonstrated the successful fabrication of silicone structures at different infill percentages, with excellent resolution and mechanical properties. Our low-cost solution (costing less than USD 1000 and requiring no specialised facilities or equipment) shows great promise for practical applications in areas such as micro-fluidics, prosthesis, and biomedical engineering based on our initial findings of 300 μm width channels (with excellent scope for smaller channels where desirable) and tunable structural properties. Our work represents a significant advance in low-cost desktop 3D printing capabilities, and we anticipate that it could have a broad impact on the field by providing these capabilities to scholars without the means to purchase expensive fabrication systems.
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