Coating method using enamel and equipment for carrying out the method
AssigneeBhi Co., Ltd.
InventorJong Inn Woo
Life of this patent
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Abstract
Provided are an enamel coating method and apparatus. The enamel coating method includes (a) preprocessing a surface of the metal tube by feeding the metal tube into a preprocessing chamber by an in-feed conveyor; (b) coating the surface of the metal tube with an enamel glaze supplied from an enamel glaze supply nozzle provided inside a coating chamber by feeding the preprocessed metal tube into the coating chamber; and (c) firing the coated metal tube by feeding the coated metal tube into a firing chamber, wherein the (b) coating includes spraying air toward the metal tube by an air spray nozzle provided inside the coating chamber.
Claims9
An enamel coating apparatus comprising:
- an in-feed conveyor feeding a metal tube longitudinally and rotating the metal tube;
- a preprocessing chamber that preprocesses a surface of the metal tube fed from the in-feed conveyor while being rotated;
- a coating chamber that coats the surface of the metal tube with an enamel glaze supplied from an enamel glaze supply nozzle provided therein when the preprocessed metal tube is fed;
- and
- a firing chamber for firing the coated metal tube when the coated metal tube is fed,
- wherein an air spray nozzle for spraying air toward the metal tube is provided inside the coating chamber,
- wherein the air spray nozzle sprays the air in a direction opposite to a rotating direction of the metal tube, and is provided such that the sprayed air is aimed at the lowest end of the metal tube, the air spray nozzle being mounted on an inner wall of the coating chamber and downwardly inclined.
Dependencies are inferred from the claim text.