Coating apparatus – Control means responsive to a randomly occurring sensed... – Responsive to attribute – absence or presence of work
Patent
1989-03-28
1990-09-25
Hoag, Willard
Coating apparatus
Control means responsive to a randomly occurring sensed...
Responsive to attribute, absence or presence of work
118677, 118 63, 118419, 118423, 118428, B05C 312
Patent
active
049585894
ABSTRACT:
A continuous melt-plating apparatus has a guide roller provided above the sink roller. The guide roller is capable of curving into a configuration arbitrarily varied in the widthwise direction of the strip, in such a manner that the waving and curving of the steel strip, which is very variable depending on the thickness, the width and the material of the steel strip, changes of the sink roller, the plating speed, and the thickness of the plating, can be coped with precisely in accordance therewith. A detector for detecting the degree of flatness of the steel strip in the widthwise direction is provided downstream of the gas wiping nozzle, and the curving of the guide roller is controlled through a feedback control for adjusting the amount of variation of the guide roller's pushing, so that the flatness can be precisely maintained right at the portion corresponding to the gas wiping nozzles. By virtue of this arrangement, it is possible to achieve flatness of the steel strip with a high degree of precision in the portion corresponding to the gas wiping nozzle. Therefore, the gap between the gas wiping nozzle and the steel strip can be maintained constant widthwise, thereby making constant the force from the nozzle with which excess of the plating melt is blown off and wiped off, which in turn makes it possible to obtain platings of very uniform thickness.
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Hasegawa Tuneyuki
Homma Masatoshi
Yamaguchi Teruo
Hitachi , Ltd.
Hoag Willard
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