Patent ID: 9149851
Filing Date: 2015-10-06
Classification: B21B,B21D,Y10T

Abstract:
1. A process for producing a metallic molded sheet, said process comprising: a step of providing a metallic sheet having a thickness of 0.2 to 0.5 mm; a step of passing the metallic sheet between a pair of first corrugating gear rolls having on their respective surfaces teeth which are formed along an axial direction of the first corrugating gear rolls and are meshed with each other in the form of gears, to thereby obtain a metallic molded sheet having first waveforms; a step of passing the metallic molded sheet having the first waveforms between a pair of second corrugating rolls having on their respective surfaces teeth which are formed along an axial direction of the second corrugating gear rolls and are meshed with each other in the form of gears, in such a way that ridge lines of the first waveforms and ridge lines of the teeth of the second corrugating gears rolls perpendicularly intersect each other; and defining a roll gap between bottom lands of one of the second corrugating gear rolls and top lands of the other of the second corrugating gear rolls that is wider than a roll gap between bottom lands of one of the first corrugating gear rolls and top lands of the other of the first corrugating gear rolls.