THIN METAL PLATE HAVING MANY PROJECTIONS ON SURFACE AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To manufacture a thin metal plate having many projections by compression-formed without causing creak, warp, droop to a shoulder part and a base part of the projecting part. SOLUTION: In the thin metal plate having many projections 12 on the surface, a forming material A is held between a female die 22 having many recessedious 22b on the surface and a male die 21 having many projections on to the bottom part of a recessed part 21 where the female die 22 is inserted, in the state that a liquid pressure is actuated between the forming material A and the recessed part 21b of the male die 21, the forming material A is formed stepwise by conducting compressed-forming.