Article excerpt from the September 2017 issue of Foundry Trade Journal by S. Clifford and H. Rehse
There are several different types and formulations for release agents used in the cold box process. In highly stressed areas of the core box, traditional release agents do not function well. A new resistant release coating based on novel technology that adheres to the core box has been developed and introduced into foundry production to combat resin wipe-off. Trials ran to monitor the number of cycles before the release coating needed re-application. Data is presented from the trials. The testing shows the coating to be effective up to several hundreds or even thousands of cycles between applications.