Patent ID: 7340935

Claim:
An equipment for producing a corrugate fin having a plurality of corrugated sections from a metal plate, comprising: a lower die block; an upper die block being capable of moving to and away from said lower block; a die being fixed to said lower block; a plurality of punches being provided to said lower block, located above said die, biased upward by biasing means and capable of independently moving toward said die, said punches respectively having projections, each of which is upwardly projected from an upper face of said punch and each of which has a side slope face; a pair of cam blocks being capable of relatively moving close and away from each other, said cam blocks respectively having pressing sections, which are formed in bottom faces and which are capable of moving along the side slope faces and contacting the projections of said punches so as to press said punches toward said die against a biasing force of the biasing means; and a cam plate being provided to said upper block, said cam plate relatively moving said cam blocks close or away from each other in a horizontal plane with the movement of said upper block toward said lower block; wherein positions of the side slope faces of the projections are different so as to make the pressing sections of said cam blocks contact the projections in order when said cam blocks are relatively moved close or away from each other in the horizontal plane, and said cam blocks move said punches toward said die in order, by one closing action of said blocks.