B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
26/146
B21D 53/04 (2006.01) B21D 31/04 (2006.01) B21D 53/02 (2006.01) F28F 1/12 (2006.01)
Patent
CA 1237879
ABSTRACT OF THE DISCLOSURE An apparatus, for forming fins for heat exchangers, having a pair of rolls which are provided on the outer periph- eral surfaces thereof, with grooves of a pattern corresponding to the shape of the fins and which form the fins by pressing the fins from opposite sides thereof with the aid of a synchronous rotation of the rolls to give smooth curved outer surfaces to them, characterized in that the grooves on the rolls are formed so that each groove may be composed of a bottom portion having a substantially arcuate shape and a tapered portion converging form the outer peripheral surface toward the bottom portion of the roll as viewed in section, and at least one roll of the pair of rolls is provided with an urging means for pressing the aforesald roll against the other roll at a constant pressure. An appara- tus for forming needle fins for heat exchangers characterized by further providing a means for alternately oppositely bending the fins which have been formed to be possessed of the curved outer surfaces. An apparatus for forming needle fins for heat exchang- ers characterized by further successively providing an arrange- ment forming roll area on a downstream side of the fin section forming roll area.
439424
Fujimoto Michio
Hamanaka Ryomyo
Marks & Clerk
Mitsubishi Jukogyo Kabushiki Kaisha
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