The present disclosure provides systems and methods for in-line thermal flattening and enameling of steel sheets. The systems and methods include an in-line thermal flattening of a feed stock steel sheet and a subsequent enamel coating of the steel sheet. The resulting enamel coated steel sheet has improved flatness compared with other coated steel sheets that are enamel coated but do not undergo the in-line thermal flattening. The systems and methods allow the use of less expensive source materials without sacrificing quality in the finished enameled product.

The present disclosure provides systems and methods for in-line thermal flattening and enameling of steel sheets. The systems and methods include an in-line thermal flattening of a feed stock steel sheet and a subsequent enamel coating of the steel sheet. The resulting enamel coated steel sheet has improved flatness compared with other coated steel sheets that are enamel coated but do not undergo the in-line thermal flattening. The systems and methods allow the use of less expensive source materials without sacrificing quality in the finished enameled product.

The present invention relates to an enamel coating device for a fin tube and its method and, more particularly, to an enamel coating device for a fin tube for efficiently coating a fin tube with enamel. The configuration of the present invention for achieving the objects provides an enamel coating device for a short fin tube that is not deformed at a high temperature, the device including: a conveying unit that conveys a fin tube having a hollow tube and a fin spirally formed on the outer side of the tubes; an applying unit that applies glaze powder to the fin tubes loaded by the conveying unit; and heating units that are disposed at both sides of the applying unit to heat the fin tubes, in which the glaze powder is pure frit.

The present disclosure provides systems and methods for in-line thermal flattening and enameling of steel sheets. The systems and methods include an in-line thermal flattening of a feed stock steel sheet and a subsequent enamel coating of the steel sheet. The resulting enamel coated steel sheet has improved flatness compared with other coated steel sheets that are enamel coated but do not undergo the in-line thermal flattening. The systems and methods allow the use of less expensive source materials without sacrificing quality in the finished enameled product.

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.

Provided is a production apparatus for producing an enameled copper wire, the production apparatus comprising: a first paint applicator; a first die; a second paint applicator; a second die: and a baking section.

Provided is a production apparatus for producing an enameled copper wire, the production apparatus comprising: a first paint applicator; a first die; a second paint applicator; a second die: and a baking section.

A manufacturing apparatus for an enameled copper wire of the present disclosure includes a wire drawing section, an application and baking section, and a cooling section. The wire drawing section continuously performs cold wire drawing, using a wire drawing die, on a copper wire that is traveling, thereby producing a copper drawn wire. The application and baking section applies an enamel coating material to a surface of the copper drawn wire and bakes an obtained coating material film. The cooling section cools the copper wire so that a temperature of the copper drawn wire at a position that is forward of an outlet-side end face of the wire drawing die with respect to a traveling direction of the copper wire and that is 6 cm apart from the outlet-side end face is 70 C. or less.

A manufacturing apparatus for an enameled copper wire of the present disclosure includes a wire drawing section, an application and baking section, and a cooling section. The wire drawing section continuously performs cold wire drawing, using a wire drawing die, on a copper wire that is traveling, thereby producing a copper drawn wire. The application and baking section applies an enamel coating material to a surface of the copper drawn wire and bakes an obtained coating material film. The cooling section cools the copper wire so that a temperature of the copper drawn wire at a position that is forward of an outlet-side end face of the wire drawing die with respect to a traveling direction of the copper wire and that is 6 cm apart from the outlet-side end face is 70 C. or less.