Patent ID: 8110244
Filing Date: 2012-02-07
Classification: B29C,B32B,Y10T

Abstract:
1. A manufacturing method of an organic-resin coated metal sheet by directly extruding an organic resin melted by heating from a die lip of a T-die in a film shape onto a metal sheet thus applying an organic resin film to the metal sheet by coating, the manufacturing method comprising the steps of: continuously feeding a long strip metal sheet using a metal-sheet supply means; measuring temperatures of edge portions of the metal sheet and a temperature of an approximately central portion of the metal sheet using a metal-sheet temperature measuring means arranged directly upstream of lamination rolls; inputting temperature values respectively measured by the metal-sheet temperature measuring means to a heating temperature control means; feeding an output value calculated by the heating temperature control means to a metal sheet center portion heater arranged directly upstream of the T-die; heating a widthwise approximately center portion of the metal sheet to a first temperature by the metal sheet center portion heating means based on the output value; feeding the output value calculated by the heating temperature control means to a metal sheet edge portion heating means arranged directly upstream of the T-die; heating widthwise edge portions of the metal sheet to a second temperature higher than the first temperature by the metal sheet edge portion heating means based on the output value; applying a resin film extruded from the T-die such that the resin film projects from both widthwise edge portions of the metal sheet by sandwiching and pressure-bonding the metal sheet and the resin film between a pair of lamination rolls; and removing resin portions in a semi-molten state and projecting from both edge portions of the metal sheet by press cutting.