Patent ID: 6813924
Filing Date: 2004-11-09
Classification: B21D

Abstract:
Process for the wall ironing of a product in sheet form, which is formed from a metal sheet coated on at least one side with a layer of plastic, comprisingmoving the product with a plastic coating layer in a direction of movement along a forming surface of a wall-ironing tool during the wall ironing, the forming surface comprising a plurality of zones along a length of the forming surface, each zone being at an entry angle with respect to the direction of movement of the product, the plurality of zones comprising a starting zone and a subsequent zone, the product moving along the starting zone and subsequently moving along the subsequent zone, wherein the entry angle varies over the length of the forming surface, in the direction of movement of the product past the forming surface, this entry angle being smaller in the starting zone of the forming surface than in the subsequent zone of the forming surface.