METHOD FOR MANUFACTURING LOUVER FINS FOR USE IN HEAT EXCHANGER

摘要

A sheet of thin fin blank is formed with a number of cylindrical collars (14) in each of which a heat conductive tube is inserted. Bridge-shaped protruded louvers are then formed in parallel with the rows of cylindrical collars. A pilot pin (24) is inserted in one of the cylindrical collars for predetermining a transverse width of the louver fin by measuring from the cylindrical collar. The blank sheet(11) is cut into the predetermined transverse width for obtaining a number of fin louvers with the predetermined width from the blank sheet.