| 摘要 |
PROBLEM TO BE SOLVED: To provide a grating body, having high corrosion resistance, and a storage battery superior a service life characteristic by restraining the occurrence of cracks of the node part of the grating body for the storage battery, using rotary expanding method. SOLUTION: In the rotary expansion method, by making a pair of rollers facedly mesh by alternately arranging a projecting blade and a flat part on the circumference and superposing a plurality of disk-like cutters in the flat part a plurality of strips of intermittent slits are formed on a lead alloy sheet for passing between the pair of rollers; filament parts 21 between the adjacent slits are overhung, in a mutually inversely turning curved shape in almost the vertical direction to a lead alloy sheet surface; intermittent parts of the intermittent slits are alternately cut by meshing of the flat part; and the intermittent slits are formed in a zigzag shape, and a meshing quantity d in the flat part is set to 0.05 mm to 0.90 mm. |
