Patent ID: 9616637
Date: 2017-04-11
CPC Classifications: B28B,B29C,B32B

Claim:
1. 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.