Patent ID: 7766543
Filing Date: 2010-08-03
Classification: B22C

Abstract:
1. A method for controlling an expandable mixture so as to make it in a predefined normal condition when a casting mold is made by injecting the expandable mixture in a heated cavity of a mold, wherein the expandable mixture is made by mixing particulate aggregate, a water-dispersed binder, and water, wherein the method comprises (a) a step of measuring the temperature of the expandable mixture, (b) a step of determining each reference value of the one or more characteristic parameters that show a characteristic property of the expandable mixture based on the measured temperature and the predetermined relationship between a characteristic property of an expandable mixture and its temperature, (c) a step of measuring the one or more characteristic parameters that show the condition of the mixing of the expandable mixture, (d) a step of determining whether each characteristic parameter is within the corresponding reference value, and (e) a step of determining whether the expandable mixture has been made under the normal condition or if the condition needs to be adjusted.