Die for forming honeycomb structure and manufacturing method therefor

A die for forming a honeycomb structure, comprising:

• a second plate-shaped portion having a second bonded surface, where a back hole for introducing a forming raw material is formed;
• and
• a first plate-shaped portion that has a first bonded surface and is formed of tungsten carbide based cemented carbide, where a slit communicating with the back hole to form a forming raw material is formed, and a cavity communicating with the back hole and the slit is formed in the first bonded surface side,
• 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 is arranged on the second plate-shaped portion such that the first bonded surface comes into contact with the second bonded surface,
• an open end of the cavity on the first bonded surface has a diameter different from that of an open end of the back hole on the second bonded surface, and
• the open end of the cavity on the first bonded surface is arranged inside the open end of the back hole on the second bonded surface, or the open end of the back hole on the second bonded surface is arranged inside the open end of the cavity of the first bonded surface.