Method and device for producing honeycomb structure

A method for producing a honeycomb structure, the honeycomb structure comprising:

• an outer peripheral wall;
• a partition wall arranged on an inner side of the outer peripheral wall, the partition wall defining a plurality of cells each extending from one end face to other end face to form a flow path;
• a plurality of slits spaced apart from each other in a circumferential direction and extending inwardly in a radial direction from the outer peripheral wall, the plurality of slits being provided such that the outer peripheral wall is opened;
• and
• a filling material filling each of the slits,
• wherein the method comprises:
• a preparation step of preparing a honeycomb structure element having the plurality of slits;
• and
• a filling step of filling the plurality of slits with the filling material by a contacting member by feeding the filling material to an outer peripheral surface of the honeycomb structure element, and rotating the honeycomb structure element while pressing a tip portion of the contacting member inclined at an angle relative to a normal line of the outer peripheral surface of the honeycomb structure element against the outer peripheral surface with a force, to obtain the honeycomb structure having the plurality of slits filled with the filling material.