METHOD OF SAND MIXTURE'S QUALITY TESTING AND DEVICE FOR CARRYING OUT THIS METHOD

摘要

The quality testing of the sand mixture according to its inner friction is characterized by high speed and precision. The measure of sink of the sand mixture is optically determined, when it is picked up by a testing comb, which is formed by a continuous base (1) with fixed parallel bars (2) with the section in the shape of a circle and diameter from 0.5 to 5.0 mm or parallel bars (3) with the section in the shape of a square or rectangle with the sides from 0.5 to 10.0 mm. The distance between at least three bars (2, 3) is always the same and amounts to 2 to 20 mm.<IMAGE>