SUBSTRATE FOR TRAPPING FINE PARTICLES IN THE EXHAUST GAS EMITTED FROM THE COMBUSTION CHAMBER OF THE INTERNAL COMBUSTION ENGINE AND METHOD OF MANUFACTURING THEREOF

摘要

PURPOSE: To provide a substrate used for exhaust gas purification capable of completely blocking an opening at a passage of the substrate. CONSTITUTION: The method comprises steps of forming a pre-mold(1) having a plurality of passages(2,3) partitioned by a plurality of partition walls(4) and parallely extended from one another; a first transforming step for transforming the ends of the partition walls at the first end of the pre-mold partitioning one of each two adjacent passages in such a manner that the ends of the partition walls are collected toward the center of the corresponding passage and connected to each other; and a second transforming step for transforming the ends of the partition walls at the first end of the pre-mold in such a manner that the end surface of each of the partition walls at the first end of the pre-mold is depressed toward the center of the end surface.