| 摘要 |
PURPOSE:To improve a corrosion resistance and to shorten correcting time by heating at the specified temp. together with pressing a tape-shaped resin to the inner side of the weld zone of a can body, then by releasing the press after cooling with maintaining the press condition. CONSTITUTION:A mandrel 16 is arranged inside a can body 12 and a presser body 20 outside thereof, and a tape-shaped resin 10 is pressed to the inner part of a weld zone 14 by the elastic part 18 of the weld zone 14. A high frequency heating coil 26 is incorporated in the presser 20, which heats with induction the weld zone 14. The tape-shaped resin 10 and weld zone 14 are pressed by adequate pressure with the elastic bodies 18 and 20 of the mandrel 16 and the resin 10 is heated to the temp. of >=+20 deg.C with operating the heating coil 26. The resin 10 is then cooled by <=+5 deg.C with maintaining the pressure and the pressing is released. With said method the correction is enabled in short time and the durability is improved as well due to the foaming control of the resin. |
