Process and installation for the high-velocity dip-coating of filament like materials
AssigneeKokoku Steel Wire Ltd.
InventorMichel Kornmann
Life of this patent
Estimating the term…
Abstract
In a case where filament-like articles (e.g. wires) are dip-coated by upwardly passing the article into a bath of molten metal through the bottom and top vertical openings of a spout containing the molten metal, the article to be coated is wrapped, before it enters the bottom inlet opening in the spout, with a blanket of protective gas at a pressure sufficient to cause the gas to penetrate into the spout simultaneously with the article, to progressively and regularly circulate around the molten metal and to steadily emerge from the upper opening of the spout still effectively shielding the freshly coated article.
Claims14
A process for high-velocity dip-coating of filament-like articles by upwardly passing the article through bottom and top vertical openings of a spout containing molten metal, so as to provide a continuous molten-metal coating on the article;
- which comprises surrounding the article with a protective gas,
- wherein the spout has spout walls made of a material which is non-wettable by the molten metal, so that the protective gas penetrates into the molten metal in the bottom opening of the spout simultaneously with the article;
- then substantially all the protective gas progressively and regularly circulates between the spout walls and the molten metal away from the article, and thereafter emerges from the top opening of the spout surrounding and effectively shielding the molten-metal coated article.
Dependencies are inferred from the claim text.