Method for removing cores from castings

摘要

Method for removing a ceramic core from a casting in a relatively rapid manner wherein the casting and a fluid spray nozzle are disposed in a manner to expose a region of the core to a core dissolving fluid discharge of the nozzle and a core dissolving fluid is discharged from the nozzle toward the core region to contact the core region and dissolve core material therefrom and progressively from further regions of the core within the casting as they become exposed as core material is progressively removed. The discharge of fluid from the nozzle can be interrupted periodically to allow dissolved core material and fluid to drain from inside the casting or, alternately, the casting and nozzle can be relatively moved so that the casting can drain and/or forced air can be directed at the casting to this same end at a location spaced apart form the nozzle.