Method of producing a sealed honeycomb structure

摘要

A method of manufacturing a plugged honeycomb structure has a plugging process which includes the steps of: immersing one end (a first end) 13 of a honeycomb base material 10 in a plugging slurry 20 while vibrating the plugging slurry 20; after bringing an internal part of a cell 12a into a negative pressure and then returning it into an atmospheric pressure, vibrating the plugging slurry 20 to make the plugging slurry 20 enter a first open end of the cell 12a; and drying the plugging slurry 20 having entered the first open end of the cell 12a to form a first plugging portion 19 at the first end.