Patent ID: 6516863
Filing Date: 2003-02-11
Classification: B22C

Abstract:
A method for use in preparing a foundry sand mix comprising a mixture of sand and particulate bond material thus to make a foundry sand mix suitable for use in making sand molds to be used in casting metal parts in a foundry operation, the method comprising:(a) conveying particulate bond material to a pre-mix tank using non-gaseous conveyance, and discharging such particulate bond material into such pre-mix tank; (b) adding water to the pre-mix tank; (c) mixing the particulate bond material and water in the pre-mix tank to thereby make a pre-mix bond slurry; and (d) adding sand to the pre-mix tank in an amount of zero up to an amount which, after the recited mixing in the pre-mix tank, results in no more than 15 percent by weight of the bond material being free bond material in the pre-mix bond slurry.