Patent ID: 7842213

Claim:
A die for extrusion-molding, comprising: a die main body comprising a molding groove part provided with one or more molding grooves and a material supplying part for supplying a material to said molding groove part, wherein said molding groove part and said material supplying part both have a substantially planar configuration, said molding groove part is smaller in size than said material supplying part and is attached to a center portion of said material supplying part; and an outer frame adapted to affix said die main body to a front end of an extrusion molding apparatus, said outer frame comprising: a die holding part having first and second surfaces and an opening extended therebetween, the opening is sized to receive said molding groove part, and the thickness of the die holding part is the distance between the first and the second surfaces so that when the thickness of said molding groove part is X, the thickness of said material supplying part is Y, and the thickness of the die holding part of said outer frame is Z, thicknesses X, Y and Z satisfy the following inequalities (1) to (5): 3 (mm)≦X≦4 (mm) (1), 5 (mm)≦Y≦10 (mm) (2), 3.5 (mm)≦Z≦8.5 (mm) (3), 0.8 <Y/X< 2.5 (4), and 1 <Z/X< 2 (5), wherein said die is made of tool steel, tool steel for hot working, or hard metal, and said die is used to manufacture a porous ceramic member having a plurality of cells placed in parallel with one another in the longitudinal direction of said porous ceramic member with a partition wall between adjacent cells by degreasing and firing a ceramic mold body extrusion molded by said die, said porous ceramic member being made of silicon carbide or silicon carbide-silicon composite.