Method and apparatus for detecting internal cavities in casting

Details Method and apparatus for detecting internal cavities in casting Method and apparatus for detecting internal cavities in casting

1977-12-27

1979-07-10

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

G01N 2904

Patent

active

041603877

ABSTRACT:
A method and an apparatus for detecting the internal cavities in a continuous casting bar in which two opposite surfaces of a casting bar delivered from a continuous casting machine are held between a pair of rollers each having a hollow portion and are pressurized at a predetermined pressure thereby, and an amount of transmission of an ultrasonic wave having a predetermined frequency passing through the casting bar is detected by means of an ultrasonic wave device for transmission and an ultrasonic wave device for reception which are provided respectively in the hollow portions of the rollers to allow the ultrasonic wave to pass through the casting bar running through the rollers, thereby to detect the internal cavities in the casting bar.

REFERENCES:
patent: 2912853 (1959-11-01), Hanyz
patent: 3550438 (1970-12-01), Kapluszak
patent: 3625051 (1971-12-01), Uozumi

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