Mold wall collapse in the lost foam casting process has been largely associated with poor sand compaction where pattern design and glue line placement has been overlooked. In this paper, the design and location of glue joints is studied to determine its role in mold wall collapse, by measuring time... more

Mold wall collapse in the lost foam casting process has been largely associated with poor sand compaction where pattern design and glue line placement has been overlooked. In this paper, the design and location of glue joints is studied to determine its role in mold wall collapse, by measuring time for the metal front to pass through a directional glue joint. Using high temperature glass, the flow of the metal and the kinetic zone was tracked with a high-speed camera and thermocouples were used to measure the time and temperature of the metal front. It was found that location of glue joints and glue type can cause sand collapse in addition to poor sand compaction. less