Grid casting mold for the casting of lead grids for accumulators and methods for its manufacture
AssigneeHagen Batterie AG
InventorsReinhold Wiedenmann, Karl-Christoph Berger, Eberhard Nann
Life of this patent
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Abstract
A grid casting mold for the casting of accumulator lead grids has two plates (11, 12) which can be placed against one another with a casting profile (13) or mold cavity complementary to the lead grid which is to be manufactured being formed in their confronting mold surfaces. The plates (11, 12) moreover have a base body (14, 15) which is provided at the profile side with a thermally insulating layer (16, 17) of high temperature fiber ceramic material which is coated on the side remote from the base body (14, 15) with a high wear resistant metal oxide (18, 19).
Claims19
A method of manufacturing a grid casting mold comprising the steps of:
- providing first and second metal base bodies having profile sides facing each other;
- applying a thermally insulating layer of fiber ceramic to the profile side of each base body;
- plasma spraying a layer of metallic oxide onto a surface of each fiber ceramic layer remote from the base body;
- before the plasma spraying step, machining a casting profile into the surface of each fiber ceramic layer, each casting profile being machined to account for the layer of metallic oxide;
- introducing a soluble oxide into each layer of metallic oxide;
- and
- after the plasma spraying step, dissolving the soluble oxide from each layer of metallic oxide to provide a porous outer layer.
A method of manufacturing a grid casting mold comprising the steps of:
- providing first and second metal base bodies having profile sides facing each other;
- applying a thermally insulating layer of fiber ceramic to the profile side of each base body;
- plasma spraying a layer of metallic oxide onto a surface of each fiber ceramic layer remote from the base body;
- before the plasma spraying step, machining a casting profile into the surface of each fiber ceramic layer, each casting profile being machined to provide space for the layer of metallic oxide;
- introducing graphite into each layer of metallic oxide;
- and
- after the plasma spraying step, oxidizing the graphite into carbon dioxide to provide a porous outer layer.
A method of manufacturing a grid casting mold comprising the steps of:
- providing first and second metal base bodies having profile sides facing each other;
- forming first and second thermally insulating layers of fiber ceramic in a manufacturing mold, the fiber ceramic layers each having a flat side and a profile side opposite the flat side, each profile side having a surface with a casting profile, the casting profile being machined to provide space for a layer of metallic oxide on the surface of the fiber ceramic;
- applying the flat sides of the fiber ceramic layers to the profile sides of the metal base body;
- introducing a soluble oxide into a metallic oxide;
- plasma spraying the layers of metallic oxide onto the surfaces of the fiber ceramic layers;
- and
- dissolving the soluble oxide from the layers of metallic oxide to provide a porous outer layer.
A method of manufacturing a grid casting mold comprising the steps of:
- providing first and second metal base bodies having profile sides facing each other;
- forming first and second thermally insulating layers of fiber ceramic in a manufacturing mold, the fiber ceramic layers each having a flat side and a profile side opposite the flat side, each profile side having a surface with a casting profile, the casting profile being machined to account for a layer of metallic oxide on the surface of the fiber ceramic layer;
- applying the flat sides of the fiber ceramic layers to the profile sides of the metal base body;
- introducing graphite into the layers of metallic oxide;
- plasma spraying the layers of the metallic oxide to the surfaces of the fiber ceramic layers;
- and
- oxidizing the graphite into carbon dioxide to provide a porous outer layer.
A method of manufacturing a grid casting mold having finished molding surfaces comprising the steps of:
- providing first and second metal base bodies having generally flat surfaces facing each other;
- applying a thermally insulating layer of porous fiber ceramic to the flat surface of each base body;
- plasma spraying a layer of metallic oxide to a surface of each ceramic fiber layer remote from the base body;
- and
- before the plasma spraying step, machining a casting profile into the surface of each fiber ceramic layer, the casting profile being machined to provide space for a thickness of the layer of metallic oxide whereby a free surface of the metallic oxide defines the finished molding surfaces.
A method of manufacturing a grid casting mold comprising the steps of:
- providing first and second metal base bodies having generally flat surfaces facing each other;
- forming first and second thermally insulating layers of porous fiber ceramic in a manufacturing mold, the fiber ceramic layers each having a flat side and a profile side opposite the flat side, the profile side having a surface with a casting profile machined to provide space for a thickness of a layer of metallic oxide on the surface;
- applying the flat sides of the fiber ceramic layers to the flat surfaces of the metal base bodies;
- and
- plasma spraying the layers of metallic oxide to the profile sides of the fiber ceramic layers.
Dependencies are inferred from the claim text.