Manufacturing apparatus for heat exchanger fins

A manufacturing apparatus for heat exchanger fins comprising:

• a press apparatus that forms metal strips by aligning a plurality of thin metal plates in a feeding direction of the metal plates and in a width direction that is a direction perpendicular to the feeding direction and forming, by press machining, a plurality of through-holes;
• and
• a feeding apparatus that feeds the metal strips formed by the press apparatus in the feeding direction,
• wherein the feeding apparatus includes:
• a reference plate on whose upper surface the metal strips are placed and in which a slit that extends in the feeding direction of the metal strips is formed so as to pass through from the upper surface to a lower surface of the reference plate;
• a plurality of reciprocating members that are provided below the reference plate, move reciprocally in parallel to the reference plate in the feeding direction of the metal strips and an opposite direction, and are provided with feed pins, which are capable of up-down movement toward the reference plate and whose front end portions are inserted into the through-holes of the metal plates placed on the reference plate;
• and
• driving means that converts up-down movement of the press apparatus to reciprocal movement in the feeding direction and the opposite direction and causes the reciprocating members to move reciprocally,
• wherein the plurality of reciprocating members are split into two groups that move reciprocally with respectively different orders, and
• wherein in a predetermined half cycle out of one cycle of the up-down movement of the press apparatus, the driving means drives the groups of the reciprocating members so that a first reciprocating member group out of the two reciprocating member groups carries out a feeding process where the first reciprocating member group moves in the feeding direction with the feed pins inserted inside the through-holes of the metal strips and a second reciprocating member group out of the two reciprocating member groups carries out a return process where the second reciprocating member group returns in the opposite direction to the feeding direction in a state were the feed pins are lowered,
• and in a remaining half cycle, the driving means carries out a lowering process for the feed pins of the first reciprocating member group and a raising process for the feed pins of the second reciprocating member group but does not drive the reciprocating member groups in the feeding direction or the opposite direction.