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Sustainability analysis of rapid prototyping: material/resource and process perspectives

机译：快速原型的可持续性分析：材料/资源和过程的观点

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摘要

Sustainability of rapid prototyping (RP) depends on both model-building materials (wooden-materials, photo-resins, etc.) and model-building processes (additive processes - SLA, SLS, etc.; and subtractive processes - e.g., wood-sawing). In this study, a sustainability index is developed for RP processes, and this index incorporates such sustainability factors as volumetric quantity of model-building material, CO_2 footprint and resource depletion of primary production of model-building material, energy consumption and CO_2 emission of the model-building process. In addition, physical models have been created from the same 3D CAD data by using both SLA-based RP technology (additive process) and wooden-material-based RP technology (subtractive process). The subtractive process uses a specially designed CNC machine tool that removes the wooden-material using a circular-saw controlled by a 3D CAD model. The model-building process has been repeated for different scales of the same 3D CAD model. Using the experimental results, the sustainability index of the two RP technologies has been compared. The results help determine the critical size of a physical model of a given 3D CAD model and RP technology ensuring sustainability. In addition, the results show new avenues for improving the respective RP technologies in terms of sustainable manufacturing requirements.
机译：快速成型（RP）的可持续性取决于模型构建材料（木质材料，光敏树脂等）和模型构建过程（加性过程-SLA，SLS等;以及减性过程-例如木材-锯）。在这项研究中，为RP过程开发了可持续性指数，该指数纳入了诸如模型制造材料的体积数量，模型制造材料的初级生产的CO_2足迹和资源枯竭，能源消耗和CO_2排放等可持续性因素。模型构建过程。此外，还通过使用基于SLA的RP技术（加法）和基于木质材料的RP技术（减法）从相同的3D CAD数据创建了物理模型。减法过程使用专门设计的CNC机床，该机床使用3D CAD模型控制的圆锯来去除木质材料。对于同一3D CAD模型的不同比例，已经重复了模型构建过程。使用实验结果，比较了两种RP技术的可持续性指标。结果有助于确定给定的3D CAD模型和RP技术确保可持续性的物理模型的临界尺寸。此外，结果显示，就可持续制造要求而言，改进相应RP技术的新途径。

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