Method of casting lead alloy automotive battery parts
First Claim
1. A method of producing a storage battery grid of uniform thickness comprising the steps of:
- (a) providing a grid mold having a mold substrate consisting essentially of aluminum and defining a grid mold cavity comprising a shallow lattice of thin grid strut mold voids having dimensions larger than those of the grid to be cast therein;
(b) hard surface anodizing at least a portion of said mold substrate to produce an insulating molding surface thereon and to reduce the dimension of said grid mold cavity to the desired grid dimensions to be cast therein;
(c) introducing molten lead alloy into said grid mold cavity against said insulating molding surface, said molding surface allowing said molten lead alloy to flow into and fill all of the interstices of said mold; and
(d) allowing said lead alloy to cool to produce a dimensionally uniform storage battery grid comprising a lattice of thin lead struts.
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Accused Products
Abstract
A novel method of producing storage battery lead alloy parts is provided comprising the steps of (a) providing a grid mold having a mold substrate consisting essentially of aluminum, (b) hard surface anodizing at least a portion of said mold substrate to produce molding surface thereon, (c) introducing molten lead alloy into such mold against said molding surface and (d) allowing said lead alloy to cool to form said storage battery grid. Other steps which may be included as a novel method of the present invention including texturing the mold substrate prior to the hard surface anodizing step to form a discontinuous surface thereon, which texturing step may be accomplished by peening said substrate with shot, blasting said substrate with glass beads, or blasting said substrate with sand.
16 Citations
9 Claims
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1. A method of producing a storage battery grid of uniform thickness comprising the steps of:
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(a) providing a grid mold having a mold substrate consisting essentially of aluminum and defining a grid mold cavity comprising a shallow lattice of thin grid strut mold voids having dimensions larger than those of the grid to be cast therein; (b) hard surface anodizing at least a portion of said mold substrate to produce an insulating molding surface thereon and to reduce the dimension of said grid mold cavity to the desired grid dimensions to be cast therein; (c) introducing molten lead alloy into said grid mold cavity against said insulating molding surface, said molding surface allowing said molten lead alloy to flow into and fill all of the interstices of said mold; and (d) allowing said lead alloy to cool to produce a dimensionally uniform storage battery grid comprising a lattice of thin lead struts.
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2. A method of producing a storage battery grid comprising the steps of:
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(a) providing a grid mold having a mold substrate consisting essentially of aluminum and defining a grid mold cavity comprising a shallow lattice of thin grid-strut mold voids having dimensions larger than those of the grid to be cast therein; (b) hard surface anodizing at least a portion of said mold substrate to produce an insulating molding surface thereon and to reduce the dimensions of said grid mold cavity to the desired grid dimensions to be cast therein; (c) successively performing the following steps to form the desired number of said battery grids thereon; (i) introducing molten lead alloy into said grid mold cavity against said insulating molding surface, said molding surface allowing said molten lead alloy to flow into and fill all of the interstices of said mold; (ii) allowing said lead alloy to cool to form said storage battery grid lattice; and (iii) removing said grid from said mold to produce a dimensionally uniform storage battery grid comprising a lattice of thin lead struts. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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Specification