METHOD FOR CONTROLLING COATING WEIGHT IN MOLTEN DIFFERENTIAL COATING

PURPOSE:To improve the quality and yield in plating by obtaining a projective intersection in the surface and back faces of the gas injection pressure of each nozzle in the coating distribution curve of each objective coating weight in the surface and back of a steel strip and setting the air inject...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TONO MIKI, SOYA NOBORU, MAJIMA KAZUHIRO, TABUSE KENJI, YAJIMA TAMIO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the quality and yield in plating by obtaining a projective intersection in the surface and back faces of the gas injection pressure of each nozzle in the coating distribution curve of each objective coating weight in the surface and back of a steel strip and setting the air injection pressure on the surface and back sides to the air injection pressure on the surface and back obtd. from the above. CONSTITUTION:The surface and back of a steel strip risen from a plating bath is sprayed with a gas with different pressures to differentiate the coating weight on the surface and back. At this time, the coating weight distribution curve of each objective coating weight on the surface and back in each coating weight distribution curved face on the surface and back of the steel strip by the change of the gas injection pressure of each nozzle on the surface and back is obtd. Next, the projective intersection into the gas injection pressure faces of each nozzle on the surface and back faces of both distribution curves is obtd. By the intersection, the gas injection pressures on the surface and back are obtd. The gas injection pressures on the surface and back sides are set to the above gas injection pressures. In this way, at the time of changing the coating weight on the surface and back, the objective coating weight can immediately be regulated.