Abstract: An apparatus for manufacturing a honeycomb structure having slits and a plurality of arrays of numerous cells aligned in parallel, wherein the slits communicate with external space and are formed along the cell arrays. The apparatus includes an extruder having an extruding die for a honeycomb structure, and a slit forming member arranged near the extruding die and protruding along arrays of a molded article being extruded in which slits are to be formed.

Abstract: A method for manufacturing a honeycomb structure having slits is provided which permits accurate forming of fine slits to cut or grind a targeted cell array alone and which is suitable for application to mass production. The method provides a honeycomb structure having slits and a plurality of arrays of numerous cells aligned in parallel. The slits communicate with an external space and formed along the arrays. The slits are formed by protruding a slit forming member 4-toward the molded article during the extrusion step.

Abstract: A method for manufacturing a honeycomb structure having slits, which permits accurate forming of fine slits to cut or grind a targeted cell array alone and moreover is suitable for application to mass production, is to be provided. It is a method for manufacturing a honeycomb structure having slits and a plurality of arrays of numerous cells aligned in parallel; the slits communicating with external space and being formed along the arrays. Slits 5 are formed by protruding a slit forming member 4 toward a molded article 3 during the step of extruding the honeycomb structure.