Investment Casting with Ice Patterns and Comparison with Other Types of Rapid Prototyping Patterns
The process of investment casting with ice patterns was studied with the objectives to reduce casting defects and increase dimensional accuracy of the cast metal part. Frequently observed casting defects included air bubbles and incomplete geometry of the cast part. These problems were addressed by optimizing the catalyst-to-binder ratio, vacuum treatment of water, pre-wetting the master mold, providing adequate mold support, controlling slurry pouring speed, and dressing the ice pattern before casting. The dimensional accuracy and surface roughness of metal castings from ice patterns were measured compared with of metal castings from other rapid prototyping patterns. It was observed that the ice pattern has a contracted cast part while the Stereo Lithography (SLA) pattern has an expanded cast part. The surface roughness of metal castings from ice patterns is comparable to that of metal castings from Fused Deposition Modeling (FDM) patterns.
C. Huang et al., "Investment Casting with Ice Patterns and Comparison with Other Types of Rapid Prototyping Patterns," TMS Annual Meeting, The Minerals, Metals & Materials Society (TMS), Jan 2007.
Shape Casting: 2nd International Symposium
Mechanical and Aerospace Engineering
Keywords and Phrases
Ice Patterns; Investment Casting; Rapid Prototyping
Article - Conference proceedings
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