68th Annual Technical Conference & Exposition MONDAY, continued
10:00 a.m. - 10:20 a.m. COFFEE BREAK 10:20 a.m. - 11:00 a.m.
Paper No. 3: Shell Drying – Effect of Ambient Conditions Upon Drying & Shell Properties Chris Whitehouse, 3M Technical Ceramics Shell drying was studied as a function of ambient room temperature and relative humidity at a fixed air speed but with oscillating movement. In a nod to the 1998 water-based shell drying paper by Snow and Scott, the principle experimental technique for drying was automated weight loss measurement. Shell temperature changes with evaporative cooling under four different temperatures (65/ 75/ 85/ 95F), three different relative humidity values (35/ 50/ 65%RH) and two different shell systems were recorded and used to denote dryness or lack thereof. Weight loss, shell temperature and room temperature are presented to help understand the completeness of the drying process for each of the conditions studied. Data sets are presented in 3D topographical map form. With 24 breaks per test condition, all told 1152 MOR test breaks were used to generate this extensive and fascinating data set. The comprehensive data will be presented with some very interesting results and discussion points.
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The ONLY monthly magazine published exclusively for the global
investment casting industry INTERNATIONAL MAGAZINE OF THE INVESTMENT CASTING INSTITUTE
11:00 a.m. - 11:40 a.m. Paper No. 4: An Investigation into Misrun Defects in Investment Cast Stainless Steel Castings Gerald Richard, MAGMA Foundry Technologies, Booth 204 The Investment Casting industry produces complex castings to near net shape. Regularly, these precision components either have thin walls or thin features that are challenging to fill, which result in misrun defects. Producing these defects is especially problematic because they will likely reduce scrap castings due to their inability to be repaired, leading to lost time and high cost. Methods used to mitigate this challenge such as increasing shell and pouring temperatures can be effective, however, changing those thermal conditions are subject to process variation or could even produce defects of their own. Understanding how the melt front cools as it flows through the investment shell cavities, analyzing the temperature and velocity profiles of the flow front while the shell is cooling, and knowing the fluidity of an alloy’s impact on the length it can flow given a section thickness will provide the tools needed to gain insight as to why these defects develop and how to eliminate them. In this paper, a case study will be used to demonstrate the root cause of misrun defects and include tips to eliminate them.
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11:40 a.m. - 12:00 p.m. Paper No. 5: AM4IC Report Out Gerard Thiel, University of Northern Iowa AM4IC - A Symposium on Additive Manufacturing for Investment Casting was hosted by the University of Northern Iowa, an ICI Allied Member. AM4IC included a tour of the UNI Additive Manufacturing Center, six presentations by industry leaders and a joint meeting of the AFS and ICI committees addressing additive and pattern manufacture. Foundries and suppliers serving the investment casting industry were invited to attend. Northern Iowa.
The ONLY monthly magazine published exclusively for the global
investment casting industry Automated Finishing Cells Cut-Off & Grinding Equipment
12:00 p.m. - 1:00 p.m. LUNCH 1:00 p.m. - 1:40 p.m.
Large Dipping Robots Engineered Drying Rooms
Paper No. 6: Optimization of an Aerospace Casting: A Case Study Tom Mueller, Mueller Additive Manufacturing Solutions Solidiform, an aluminum aerospace investment casting foundry in Fort Worth, Texas has been casting an aircraft instrument housing for a defense supplier customer. Solidiform’s customer was looking to reduce weight on the aircraft the housing was used on with the objective of reducing fuel consumption. Using topology optimization and printed patterns, the company was able to present a design that would bring the company annual fuel savings.
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AGENDA
It was held on October 5, 2021, at the University of
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