Shell drying is an important aspect of the investment casting process. Over drying or under drying a shell can result in various issues related to casting quality. Shell drying rates are influenced by temperature, relative humidity and air-flow.

In the past, shell dryness was difficult, if not impossible, to measure which could result in variations in casting quality. Building on a newly created method for measuring shell dryness, it is now possible to measure the temperature and relative humidity of the shell during the dipping and drying process using wireless technology. This provides the opportunity to monitor shell dryness in real time and as necessary, modify the process to achieve optimal shell dryness.

The paper will provide a case study on how this technology was used to improve casting quality at FS Precision Tech.