Patent ID: 8424358

Claim:
A production equipment for producing a corrugated fin having a plurality of ribs from a metal plate, comprising: a lower block; an upper block being moved to and away from the lower block; a die being provided to the lower block and having a concave section; a punch being inserted into the concave section so as to form the rib when the lower block and the upper block are closed; and a movable die constituting a part of the die including the concave section, the movable die being upwardly moved above other parts of the die so as to lift a part of the corrugated fin, in which the rib has been formed, from the underside after the lower block and the upper block are closed to form the corrugated fin, a lifter being capable of contacting a lower face of a non-ribbed part of the corrugated fin, which is located on an upstream side in a feeding direction of the metal plate and in which a rib is still not formed, and a lower face of the formed rib, which is located on a downstream side in the feeding direction of the metal plate, the lifter lifting the non-ribbed part of the corrugated fin and the formed rib, from the underside, after the lower block and the upper block are closed to form the corrugated fin, wherein the movable die and the lifter are simultaneously started to be moved upward after the lower block and the upper block are closed to form the corrugated fin, the upward movement of the movable die is firstly stopped, and the upward movement of the lifter is stopped at a position above the stop position of the movable die, wherein the movable die has a through-hole, through which a shaft part of a fixed pin is pierced, a flange is formed at an upper end of the fixed pin, a diameter of the flange is greater than that of the through-hole, and when the movable die is moved upward, an upper face of the movable die contacts the flange, whereby the upward movement of the movable die is stopped.