PURPOSE: To produce a metal sheet with multi embossed pattern of excellent surface property in a simple process.
CONSTITUTION: A template 10 is made by mutually lapping sheets 11, 12 where plural embossed parts 11a, 12a are formed. A metal sheet 30 is inserted between the template 10 and a soft elastic body 40, and bulging parts 31 corresponding to the embossed parts are formed on the metal sheet 30 by pressing. The bulging parts 31 are plastically deformed while abutting on bulging parts 41 of the soft elastic body 40 copying shapes partitioned with internal surfaces of the embossed parts 11a, 12a formed on each sheet 11, 12. For the result, wrinkles or rub flaw, etc., caused on the tensile force are nothing, and rugged patterns of multi-stage scan be applied on the metal sheet 30 in a single process.
ISHIKAWA HANJI