To provide a cleaning method by which a mask for sealing honeycomb structure can be satisfactorily cleaned.
The cleaning method, the method being a method for cleaning the mask 1 that has a plurality of through-holes 5 running through the thickness direction D1 thereof from a top surface 1a to a bottom surface 1b, is provided with the following steps: a step wherein the mask 1 is conveyed in a conveyance direction D2 perpendicular to the thickness direction D1 of the mask; and a step wherein a cleaning solution 24 is sprayed towards the top surface 1a and bottom surface 1b of the conveyed mask 1, from two-fluid spray nozzles 26a, 26b, in the axial direction of the through-holes 5. The axis A3 along which the cleaning solution 24 is sprayed towards the top surface 1a and the axis A4 along which the cleaning solution 24 is sprayed towards the bottom surface 1b are separated from each other in the conveyance direction D2.
MORI MASAHARU
Yoshinori Shimizu
Takashi Mikami
Tomoya Furoshita