MANUFACTURING METHOD OF DIESEL PARTICULATE FILTER

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a diesel particulate filter, capable of easily removing a chip and a burr.SOLUTION: The manufacturing method of the diesel particulate filter 170 of the present invention uses a columnar honeycomb structure 70 for forming a plurality of mutually parallel through-holes 70a. The honeycomb structure 70 comprises a first end surface for positioning one opening part of the plurality of through-holes 70a and a second end surface positioned on the opposite side of the first end surface and positioning the other opening part of the plurality of through-holes 70a. The manufacturing method comprises a first process of removing the chip and the burr stuck to the honeycomb structure 70 hy sucking air on the second end surface side by simultaneously substantially vertically injecting the air into the first end surface.