| 摘要 |
A curl forming method for a can end which enables satisfactory curl formation in a thin can end without occurrence of wrinkles and without occurrence of scratches on internal surfaces of the can end and which can make a can end thinner. A punched can end is pressed and bended from an open end of annular flange and an opposite side by a primary forming die having an inner diameter larger than a final curl diameter by 0 to 2.0 mm to effect a primary forming, and then it is pressed and bended from the side of the flange open end by a secondary forming punch having a forming surface 14 having a final shape of a curl.
|
