Patent attributes
The honeycomb structure forming die includes a first die in which a central region on the side of a kneaded material discharging surface has a convex region projecting toward a downstream side in an extruding direction of a kneaded material, and a ring-shaped second die. In the first die, first kneaded material introducing holes are formed and latticed first slits are formed on the side of the kneaded material discharging surface of the convex region, and in the second die, there are formed second kneaded material introducing holes and latticed second slits communicating with the second kneaded material introducing holes, and the honeycomb structure forming die has a groove region where movement of the kneaded material is performed between the first kneaded material introducing hole and the second kneaded material introducing hole, in abutment surfaces of the first die and the second die.
