Importance

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Abstract

A metal material supply device which is annexed to a metal melting furnace has a vibration trough for transporting metal material to be supplied to a crucible; the transported metal material is discharged from a material discharge port that is provided at the front end of the vibration trough; the metal material supply device is movable between a material supply position where the material discharge port is disposed above the crucible and a retracted position from the material supply position, and supplies the metal material to the crucible at the material supply position; the upper end of the metal material supplied to the crucible and piled up is detected by a microwave level meter, and the material supply operation by driving the vibration trough is controlled on the basis of the detected value.

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First Claim