Apparatus for producing a grid for a battery plate, and method of producing the same

Abstract

It is an object of the invention to provide an apparatus for producing a grid for a battery plate which can improve the life performance of a lead storage battery, and in which a lead sheet 4 is prevented from being undulated or causing vibrations in a carrying-out portion of disk cutter rolls 2 and 3, and also a method of producing such a grid. As means for attaining the object, the axis-to-axis distance L (mm) of the two disk cutter rolls 2 and 3 in which a reference circumferential face has a radius r (mm), and which are opposed to each other is in a range of 2r−0.3 mm≦L<2r. The lead sheet 4 which has been passed through between the two disk cutter rolls 2 and 3 is once transported along the peripheral face of the lower disk cutter roll 3, and the lead sheet 4 which is transported only along the peripheral face of the disk cutter roll 3 is pulled out from a position of the peripheral face in a tangential direction to be carried out.

What is claimed is:  
     
         1 . An apparatus for producing a grid for a battery plate in which two disk cutter rolls are opposed to each other, and a metal sheet is passed between said disk cutter rolls to form a large number of slits in a zigzag pattern in said metal sheet, wherein 
 each of said disk cutter rolls is configured by placing a plurality of disk cutters on a same shaft with forming a gap therebetween, each of said disk cutters being configured by: alternately forming, in a whole periphery of a peripheral edge of a disk, ridges in which a peripheral side face protrudes in a ridge-like shape toward an outer periphery from a reference circumferential face of a radius r (mm), and valleys in which a peripheral side face composed of a face extending along said reference circumferential face is formed, said reference circumferential face being centered at an axis of said disk; and, for each of said valleys, forming a groove which is opened in a peripheral side face of said valley, in a peripheral edge portion of one of disk faces in which valleys that are adjacent to each other via a ridge are formed in an oppositely reverse manner, and    an axis-to-axis distance L (mm) of said two disk cutter rolls which are opposed to each other satisfies a relationship of 2r−0.3≦L<2r.    
     
     
         2 . An apparatus for producing a grid for a battery plate according to  claim 1 , wherein said apparatus comprises transporting means for once transporting said metal sheet which has been passed through between said two disk cutter rolls, along a peripheral face of one of said disk cutter rolls, and carrying out said metal sheet with pulling out said metal sheet from a position of said peripheral face in a tangential direction.  
     
     
         3 . A method of producing a grid for a battery plate in which two disk cutter rolls are opposed to each other, and a metal sheet is passed between said disk cutter rolls to form a large number of slits in a zigzag pattern in said metal sheet, wherein 
 said metal sheet which has been passed through between said two disk cutter rolls is once transported along a peripheral face of one of said disk cutter rolls, and said metal sheet is then pulled out from a position of said peripheral face in a tangential direction to be carried out.    
     
     
         4 . A method of producing a grid for a battery plate according to  claim 3 , wherein disk cutters of said disk cutter rolls which are opposed to each other are placed with making reference circumferential faces of said disk cutters in contact with each other, to cause valleys of said disk cutters overlap with each other by a dimension d (mm) (0<d≦0.3).