Patent ID: 8490673
Filing Date: 2013-07-23
Classification: B24B,B28B

Abstract:
1. A method for deflashing a ceramic foundry core obtained by injection-molding a ceramic slurry, said slurry containing a binder and having a predetermined glass transition temperature, into a mold and having at least one surface portion with surplus material forming flash to be removed, said method comprising the steps of: arranging and securing the ceramic foundry core, unfired and maintained below said glass transition temperature, on a support; placing a milling tool of elongate shape with a helical cutting edge on a toolholder; rotating the tool about an axis thereof and bringing the milling tool into contact with the at least one surface portion to be deflashed; cooling the at least one surface portion to be deflashed in such a way as to keep the at least one surface portion at a temperature below said glass transition temperature during the deflashing operation.