METHOD FOR BAKING PAINTED STEEL PLATE

• Main Authors: YAMASHITA SATORU, MURATA TOSHIMICHI, MAEDA NARUAKI, TSUTSUMI MASAYA
• Format: Patent
• Language: English
• Published: 08.08.1988
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

PURPOSE:To perform stable temp. control, by a method wherein the heating of the succeeding infrared furnace is controlled on the basis of the difference between the temp. of a steel plate on the outlet side of a hot air oven and an objective temp. value and, further, a calculated value is corrected so that the temp. of the steel plate on the outlet side of the infrared heating furnace becomes equal to the objective final baking temp. CONSTITUTION:The paint applied to a steel strip S by a roll coater 9 is heated at first in a hot air heating oven 1 where the greater part of a solvent is evaporated. Further, the steel strip is heated to objective baking temp. in the induction heating furnace 3 of the next stage and a paint film is baked and dried. In the adjustment of the furnace temp. condition during this period, the deviation of the temp. of the steel strip S on the outlet side of the heating furnace to an objective value is calculated at first and the heating quantity of the succeeding induction heating furnace 3 is determined on the basis of said deviation. Further, the temp. of the steel strip measured on the outlet side of the induction heating furnace and objective final baking temp. are allowed to correspond to each other and the calculated value is corrected so that the former becomes equal to the latter. Then, induction heating furnace 3 is controlled by a controller 7.