Nippon Steel Corporation

Akira Tanabe

Takaaki Ohsawa

Motoharu Nakamura

Yoshinao Tanaka

Hirokazu Haga

An apparatus for processing grain-oriented electrical steel strip has a groove-scribing unit, which comprises a groove-scribing roll mounted above a pressing roll, disposed on the entry side of an insulation coating unit. A bridle roll is provided above the groove-scribing roll so that the strip may be passed to the groove-scribing and insulating coating units via the bridle roll. The apparatus also has a device for guiding the travel of the bridle roll from above the groove-scribing roll to below the horizontal pass line of the strip and vice versa. A moving device attached to the bridle roll permits the bridle roll to travel up and down along the guiding device together with the strip passed therearound. When the bridle roll is positioned above the groove-scribing roll, the groove-scribing and support rolls are kept close to each other, thereby scribing grooves in the surface of the strip held between the two rolls before the strip is passed to the insulation coating unit. When the bridle roll is positioned below the pass line of the strip, on the other hand, the groove-scribing and pressing rolls are kept away from each other to allow the strip to pass direct to the insulation coating line without touching either roll. Thus, the apparatus provides a choice between two passes for the strip.

Apparatus for processing grain-oriented electrical steel strip

An apparatus for applying a powder of anti-sticking agent on a coil of oriented electrical steel strip formed on a coiler comprises a movable assembly moving closer to and away from the coiler, a stationary hood attached to the movable assembly and having slit-like suction ports provided along the walls thereof, one end of the suction ports opening toward the coiler, a duct-collecting duct connected to the slit-like suction ports of the stationary hood, movable hoods provided on the stationary hood to vertically open at the top and bottom of the open end of the stationary hood, and a group of electrostatic powder spray guns directed toward the coiler in the stationary hood in which they are disposed. The movable assembly recedes and the movable hoods open as the diameter of the coil increases so that a given space is always maintained between the surface of the coiled strip and the movable hoods. The slit-like suction ports draw out only such portion of the anti-sticking agent as is about to flow out through the small space left between the coil and hood.

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Himeji, Japan

Akira Tanabe