Die for forming honeycomb structure and manufacturing method therefor
AssigneeNGK Insulators, Ltd.
InventorsKazumasa Kitamura, Hirofumi Hosokawa, Tomoki Nagae
Life of this patent
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Abstract
A die for forming a honeycomb structure, including: a second plate-shaped portion that is formed of iron and the like and has back holes; and a first plate-shaped portion that is formed of tungsten carbide based cemented carbide and has cavities communicating with the back holes and slits communicating with the cavities, with the first plate-shaped portion having a first layer arranged in the second plate-shaped portion side and a second layer arranged on the first layer, the cavities are opened on both sides of the first layer, and the slits are opened on both sides of the second layer.
Claims15
A die for forming a honeycomb structure, comprising:
- a second plate-shaped portion having back holes for introducing a forming raw material;
- and
- a first plate-shaped portion that has cavities communicating with the back holes and slits communicating with the cavities and is formed of tungsten carbide based cemented carbide,
- wherein the second plate-shaped portion is formed of a material containing at least one selected from a group consisting of iron, steel, aluminum alloy, copper alloy, titanium alloy, and nickel alloy,
- the first plate-shaped portion has a first layer that contacts the second plate-shaped portion and a second layer arranged on the first layer,
- the cavities are opened on both sides of the first layer, a bottom portion of the cavity on a side of the second layer has a flat shape, a flat shape of which corners are straightly chamfered, or an outwardly convex curved shape on a cross section perpendicular to a surface of the first plate-shaped portion, and
- the slits are opened on both sides of the second layer.
Dependencies are inferred from the claim text.