Method of examining the surface of a continuously cast metal strip for detection of scarfs appearing thereon and apparatus for the same
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United States of America Patent
Stats
-
Dec 9, 1980
Grant Date -
N/A
app pub date -
Mar 20, 1979
filing date -
Mar 23, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for examining the surface condition of a traveling metal strip in the process of being continuously cast for detection of scarfs, if any, produced on said surface, wherein a light emitter projects light beams of short waves or those containing said short waves and other waves on a traveling metal strip in the process of being continuously cast; among the reflections of the projected light beams, only those consisting of short waves are received by the light detector through a filter; a flat hood surrounding a light path extending between the light emitter and light detector is set in a cooling chamber; compressed air streams run through the flat hood to air purge or clean the environment of the light path; a signal issued from the light detector is processed by an image memory; the shade image of the traveling metal strip is continuously displayed on the screen of a monitor television set; and the surface condition of the traveling metal strip is examined on the screen to detect scarfs, if any, produced on said surface.
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