Kawasaki Steel Corporation

Atsushi Nagashima

Kuniaki Sato

Takao Shimizu

Norio Ohta

Naohiko Soeda

Yasuhisa Nakajima

Toshimichi Ukena

Hiroshi Narumi

A method and an apparatus for continuously annealing cold rolled steel strips successively passing through a preheating zone, a low temperature heating zone, a high temperature heating soaking zone, a primary cooling zone and a secondary cooling zone. In each zone, the steel strip is driven by hearth rolls alternately upward and downward in a serpentine path. According to the invention, in a high temperature zone such as the high temperature heating zone and the primary cooling zone where the steel strip is prone to heat buckling, the steel strip is caused to pass only once in a single direction without passing along the serpentine path, thereby preventing meandering and heat buckling of the steel strip.

Continuous annealing method and apparatus for cold rolled steel strips

A device according to the invention comprises trolleys arranged above a plating bath and movable in transverse directions of a steel strip, guide rollers secured to lower ends of vertical levers depending from the trolleys and in contact with edges of the strip by urging means such as counter weights acting upon the vertical levers, and shielding plates secured to the lower ends of the vertical levers below the guide rollers so as to shield undersides of the strip in the proximity of the edges from anodes immersed in the plating bath in opposition to the strip. The device according to the invention can maintain the positional relation between the edges of the strip and shielding plates notwithstanding staggering movements of the strip to prevent the edges of the strip from being excessively plated.

Strip edge overcoating preventing device for continuous electroplating

Growing community of inventors

Chiba, Japan

Atsushi Nagashima