Patent ID: 6993984
Filing Date: 2006-02-07
Classification: B22C

Abstract:
1. A method of supplying sample sand from a kneading machine to a sand-property-measuring apparatus by a sand-supplying apparatus that comprises an opening that is made at a given height in a sidewall of the kneading machine for sampling sand, a guide tube that is installed in a sidewall of the kneading machine such that the guide tube protrudes therefrom, wherein the opening portion of the guide tube corresponds to the sand-sampling opening, and a sampling screw, which is connected to a motor mounted on a stationary supporting plate that has a surface parallel to a tangent direction of a sidewall of the kneading machine, and which passes through the guide tube with a given interval from its inside surface, a tip portion of which extends to an inside of the kneading machine, the method being characterized by the steps of further loosening the sample sand by means of loosening rods that are disposed parallel to an axis of the sampling screw at two or more positions on an imaginary periphery, the diameter of which is greater than that of the sampling screw, and changing the number of rotations of the sampling screw in correspondence to a change in pressure of the sand squeezed from the kneading machine.