Substrate used for exhaust gas purification and method of fabrication thereof

摘要

A substrate for purifying an exhaust gas, comprises a first end; a second end; partition walls extending between the first and second ends; and passages defined by the partition walls. The ends of the partition walls at the first end of the substrate defining one of each two adjacent passages are collected toward the center of a corresponding passage and connected with each other. A substrate for purifying an exhaust gas, comprises a first end; a second end; partition walls (4) extending between the first and second ends; and passages (2, 3) defined by the partition walls. The ends of the partition walls at the first end of the substrate defining one of each two adjacent passages are collected toward the center of a corresponding passage and connected with each other. The end surface of the partition wall ends at the first end of the substrate is depressed toward the center of the end surface. The ends of the partition walls at the second end of the substrate defining the remaining one of the two adjacent passages are collected toward the center of the corresponding passage and connected with each other. The end surface of the partition walls at the second end of the substrate is depressed toward the center of the end surface. An independent claim is also included for a method of fabricating a substrate used for purifying an exhaust gas includes forming a pre-mold including a first end, a second end, partition walls extending between the first and second ends, and passages defined by the partition walls. The first transforming step for transforming the ends of the partition walls at the first end of the pre-mold defines 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. The 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.