| 摘要 |
PURPOSE:To produce a grid base plate for a lead storage battery at a high rolling speed by positioning a pair of rolls in such a way that the angle between the axial line of the rolls and a horizontal plane is made acute within a specific range and feeding continuously molten lead or lead alloy into the gap part between such rolls from the acute angle side. CONSTITUTION:Molten lead or lead alloy is fed continuously and horizontally into the gap part between a pair of rolls 35 and 36, and is cooled on the surface of the rolls 35, 36 to form a solidified phase; at the same time, the solidified phase is rolled to produce continuously a thin sheet 31 of the lead or lead alloy. The angle theta between the axial line O-O' of such rolls 35, 36 and the horizontal plane r-S is set at an acute angle of 45-85 deg. and the molten metal 32 is fed from the acute angle side. Then the rolling is accomplished at a high speed higher than the rolling speed by 1.3-1.4 times in the prior art. |
