Device for casting lead grids for electric battery plates and process for their manufacture

Abstract From the Canadian patent

In a device for casting lead grids for electric battery plates, a highly porous ceramic mold lining preferably of zirconium, oxide, is prepared by flame-spraying. Such a lining can include a thin surface coating on a profiled, basic metallic mold or a separately prepared insert plate which is retained to a metallic mold holder. The ceramic surface coating may be accurately formed in place, or may be formed as an over-spray which is then reduced in thickness. Formation of the surface coating may be accomplished by placing masks on the basic metallic mold during the flamespraying, for those areas of the grid which tend to accumulate material, or by adjusting an initially coarse profile of the …