EXHAUST GAS CLEANING METAL CARRIER AND METHOD OF MANUFACTURING THE SAME

摘要

A metal carrier for supporting an exhaust gas cleaning catalyst for automobiles, motorcycles and industrial machines, and a method of manufacturing the same. In this carrier, a metal honeycomb core is press fitted in an outer metal cylinder, and the bonded portions of flat and corrugated members, which constitute the metal honeycomb core, consist of solder applied to the apex or ridge portions of the corrugated members in a spotted manner or in the form of a plurality of stripes or lines. The thickness of the solder at the bonded portions of the flat and corrugated members is not more than 100 mu m, and the positions of the bonded portions of the outer and inner surfaces of each of the flat and corrugated members differ from one another. Moreover, these bonded portions are provided via a non-bonded portion extending from an exhaust gas introduction side end surface of the metal honeycomb core as much as a length of not less than 5 % of a total length of the honeycomb core. This carrier is further characterized in that the bonded portions of the outer circumferential surface of a metal honeycomb core and the inner circumferential surface of an outer metal cylinder are in the form of a plurality of stripes or belts, or such that the bonded portions of the outermost flat and corrugated members of the metal honeycomb core and those of the outer metal cylinder are not aligned with each other with the metal honeycomb core and outer metal cylinder bonded together intermittently in both the axial and circumferential directions. The method of manufacturing such a metal carrier is characterized in that an outer metal cylinder and a metal honeycomb core are combined with each other by press fitting the latter in the former in such condition that the slurry type solder applied to the apex portions of the corrugated members is kept in a fluidized state with the solder applied to the inner surface of the outer metal cylinder not kept in a fluidized state.