Metallic coating method using ultrasonic vibration
AssigneeAsahi Glass Company, Limited
InventorsKentaro Nagano, Toru Iseda
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Abstract
A metallic coating method is carried out by contacting a surface of a substrate with a molten metal which is locally raised under ultrasonic vibration. A metallic coating can be continuously attained on one side only of ribbon type substrate in a form of plate, sheet or strip or only the outer surface of a pipe.
Claims8
A one sided surface metallic coating method wherein said ribbon strip metal is steel and said molten metal is an alloy of zinc as the main component and with 0.01 to 0.5 wt.% of Al.
A method of coating a continuous ribbon strip metal on one-sided surface only with a homogeneous metallic coating, which comprises the steps of:
- advancing said ribbon strip above a surface of a molten metal bath;
- placing a tool having a free edge for ultrasonic vibration in said molten metal bath;
- maintaining the vertical position of the free edge at or above the surface of the molten metal bath not higher than 3 mm when no ultrasonic vibration is applied to the tool;
- supporting the ribbon strip metal at a predetermined elevation relative to the surface of the molten metal bath to prevent the molten metal from contacting the upper-sided surface of the ribbon strip metal, while vibrationally contacting continuously an entire undersided surface only of said ribbon strip metal over the whole width with said raised surface of the molten metal bath, thereby coating said entire under-sided surface only of the ribbon strip metal with a homogeneous metallic coating.
Dependencies are inferred from the claim text.