Rapid Freeze Prototyping and Investment Casting Application

快速冷冻原型制作和熔模铸造应用

• 批准号: 0140625
• 负责人: Ming Leu
• 金额: $ 8万
• 依托单位: Missouri University of Science and Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-15 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0140625&HistoricalAwards=false
• 关键词: Rapid; Freeze; Prototyping; Investment; Casting

This project is aimed at demonstrating the feasibility of investment casting with ice patterns generated by Rapid Freeze Prototyping, a novel solid freeform fabrication process which builds a three-dimensional part according to a CAD model by depositing and freezing water droplets layer by layer. The feasibility study includes: exploring ways of handling and transporting ice patterns between stations for the subsequent investing casting process; identifying suitable materials including powders and binders for making ceramic shells from ice patterns; studying limitations on feature shapes and sizes of ice patterns for investment casting and ability to retain sharp features of ice patterns over time; and investigating the dimensional accuracy and surface finish of the metal castings obtained from ice patterns. If the project is successful, it will likely create a significant new approach for rapid prototyping and small-quantity manufacturing of investment casting parts with ice patterns fabricated by a cost-effective and environmentally benign method. This could significantly improve the environmental impact of processing molds in the investment casting industry.

该项目旨在展示快速冷冻成型技术产生的冰模熔模铸造的可行性，快速冷冻成型技术是一种新型的固体自由成形制造工艺，通过逐层沉积和冻结水滴，根据CAD模型构建三维零件。可行性研究包括：探讨在各站之间处理和运输冰模型的方法，以便进行随后的熔模铸造过程;确定合适的材料，包括用冰模型制造陶瓷壳的粉末和粘合剂;研究熔模铸造用冰模型的特征形状和尺寸的限制，以及随着时间的推移保持冰模型的尖锐特征的能力;并研究从冰模型获得的金属铸件的尺寸精度和表面光洁度。如果该项目成功，它可能会为快速原型和小批量生产熔模铸造零件创造一种重要的新方法，这些零件通过具有成本效益和环境友好的方法制造。这可以显著改善熔模铸造行业中模具加工对环境的影响。