Mitsubishi Jukogyo Kabushiki Kaisha

Kawasaki Steel Corporation

Kawasaki Steel Corporaton

Katsumi Makihara

Kenichi Yanagi

Takeo Fukushima

Sachihiro Iida

Osamu Hashimoto

Namio Suganuma

Ichiro Samejima

Seiichi Takahashi

The invention concerns cooling apparatus for strip metal of the kind comprising a series of spaced cooling rolls around which the strip metal is passed such that it follows a serpentine path and is cooled by contact with the rolls, and elongate gas jet devices disposed widthwise of the strip opposite the outer surface parts of respective cooling rolls in contact with the strip. The invention is characterized in that each said gas jet device is partitioned into segments in said widthwise direction, in that each segment is provided with a gas flow control valve, in that means are provided at least at one cooling roll position for detecting strip temperature across its width, and in that strip temperature control and arithmetic means are provided to which the gas flow valves and the temperature detecting means are electrically connected, the arrangement being such that the temperature difference between the average temperature across the strip and the temperature of the strip at each segment width position can be compared, via electrical signals from the temperature detecting means and, if the temperature difference at a widthwise position is above or below predetermined limits, the corresponding gas flow control valves are adjusted to bring the temperature within the predetermined limits.

Cooling apparatus for strip metal

An apparatus in which a metal strip is passed in contact partly around the outer circumferences of a number of spaced cooling rolls through which coolant passes. The apparatus includes temperature detectors for detecting the temperature of the strip before contact with each of the cooling rolls, and coolant temperature regulators controlled in accordance with the detected temperature of the strip to adjust the temperature of the coolant passing through each cooling roll to a range which limits the temperature drop of the strip such that unacceptable irregularities or distortions in the configuration of the strip cannot occur. The coolant used for each cooling roll is selected with a boiling point appropriate to the respective detected temperature for each roll. In the preferred arrangement, further temperature detectors are provided for each cooling roll to detect the temperature of the coolant, and output signals from both detectors are inputted to a control for regulating a flow rate valve.

Cooling apparatus for metal strip

Growing community of inventors

Hiroshima, Japan

Katsumi Makihara