Patent ID: 6430983
Filing Date: 2002-08-13
Classification: B21D,F28F

Abstract:
A method for manufacturing a corrugated fin, the method comprising:continuously supplying a long plate member between a pair of corrugated cutters to form a corrugated fin having a flat-shaped bent portion and including a plurality of louvers formed in a width direction of an inclined portion of the corrugated fin; and passing the corrugated fin between pairs of flick-out plates disposed at positions respectively corresponding to two width-direction end portions of the flat-shaped bent portion, thereby reducing a fin pitch of the corrugated fin and transforming a shape of the corrugated fin so that the flat-shaped bent portion extends in parallel to an advancing direction of the corrugated fin, wherein the plurality of louvers are formed symmetrically on two sides of a width-direction central portion of the inclined portion; wherein the plurality of louvers includes one-side louvers, which are formed integrally in one and the other ends of the central portion, are formed so as to project from one and the other ends of the central portion of the inclined portion toward the advancing direction of the corrugated fin; and wherein the plurality of louvers includes a plurality of louvers, which are formed respectively on one and the other sides of the central portion, are formed inclined on the same sides as the one-side louvers that are formed in one and the other ends of the central portion of the inclined portion.