Method and apparatus for producing film-coated metal plate

A production method for a film-laminated metal plate, comprising:

• (1) preheating and soaking a metal plate;
• (2) laminating a film on the metal plate using film-laminating rolls, comprising controlling an angle β to be in a range of 30-70°, wherein said angle β is an angle between the film and a vertical direction, and the film enters a roll gap between film-laminating rolls at said angle β;
• controlling an angle α to be in a range of >0 to 20° with a deflector roll configured to be movable in a horizontal direction to adjust the angle α between the metal plate and a vertical direction, wherein the metal plate enters the roll gap at said angle α;
• and then laminating the film on the metal plate using the film-laminating rolls, while controlling a temperature of the film-laminating rolls to be in a range of 50-130° C.;
• (3) cooling a surface of a resulting film-laminated metal plate rapidly to a temperature equal to or less than 50° C. at first by water spray cooling, followed by water quenching in a water quenching tank;
• (4) squeezing the film-laminated metal plate to remove most water from the surface of the film-laminated metal plate;
• and
• (5) heating the film-laminated metal plate to a temperature in the range of 50-130° C., holding for 5-40 s, and then air cooling the film-laminated metal plate to room temperature quickly.