Patent ID: 8535587

Claim:
A method for manufacturing a plugged honeycomb structure comprising: a step of forming a columnar honeycomb formed body having partition walls separating and forming a plurality of cells extending from one end face to the other end face and functioning as fluid passages, and a plugging step of forming plugging portions in an end portion of each of the cells of the honeycomb formed body; wherein the plugging step has a plugging slurry injection operation where plugging slurry is injected into the cells by inserting the honeycomb formed body into a bottomed cylindrical inside container containing the plugging slurry and having a Young's modulus of 5 to 550 MPa and a tensile stress of 0.5 to 11 MPa and being disposed in a bottomed cylindrical outside container and by pressing one end portion against the bottom face of the inside container, and then the honeycomb formed body is pulled out from the inside container, and wherein when the honeycomb formed body is pulled from the inside container, a shape of the bottomed cylindrical inside container is changed in a way that a central portion of the bottom face of the inside container is raised and an outer rim portion of an end face of the honeycomb formed body is separated from the bottom face of the inside container.