| 摘要 |
PURPOSE:To make a different fin manufacturable with width or the like of a cutting tool altered, by feeding a thin strip metal plate to be obtained by what a base material is shaved off into the specified thickness by the cutting tool, into an interval between a pair of forming rollers. CONSTITUTION:A short cylindrical base material 16 is rotated by a metallic material constituting a fin of aluminum, copper or the like centering on a shaft 17 piercing through a central part of this base material 16. And, an outer circumferential surface of the base material 16 is shaved off into the specified thickness by a cutting tool 18 set up an and around the outer circumferential surface of the base material 16, producing a long-size, thin strip metal plate 9. The strip metal plate 9 produced like this is fed into an interval between a pair of forming rollers 15 to be engaged with each other via guide rollers 12 and 13 and a tension roller 14, thereby forming it into zigzag, or forming a stirring projection or the like, thus a fin is produced.
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