B - Operations – Transporting – 22 – C
Patent
B - Operations, Transporting
22
C
22/157, 22/49
B22C 9/12 (2006.01) B22C 9/22 (2006.01) B22D 25/04 (2006.01)
Patent
CA 1267519
Abstract of the Disclosure In a device for casting lead grids for electric battery pla- tes, 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 flame- spraying, for those areas of the grid which tend to accumulate material, or by adjusting an initially coarse profile of the ceramic layer to the exact profile of the casting by a material- removing treatment. Alternatively, the insert plate may be manu- factured on a matrix with a surface contour which corresponds to the half-profile of the lead grid, as a positive mold to which the ceramic material is applied by flame-spraying after an inter- mediate coating with a removable adhesive layer. The resulting ceramic coating is then subjected to surface grinding, and is removed from the matrix.
516225
Fetherstonhaugh & Co.
Vb Autobatterie Gmbh
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