Method and apparatus of manufacturing exhaust gas-purifying catalyst and nozzle used therefor

A method of manufacturing an exhaust gas-purifying catalyst, comprising:

• discharging via a nozzle a fluid containing a raw material of a catalytic layer to a substrate using a nozzle,
• wherein the nozzle comprises:
• a hollow portion defining an internal space therein and provided with first and second openings connecting the internal space and an external space outside the hollow portion with each other, the hollow portion being configured such that the fluid is supplied to the internal space through the first opening, and
• a plate-like portion covering the second opening and provided with the discharge ports, the discharge ports configured to discharge the fluid toward the first end face of the substrate,
• wherein the discharge ports have greater diameters at a periphery of an arrangement of the discharge ports than at a center of the arrangement of the discharge ports, and wherein a ratio of the diameter of the discharge ports that are arranged at the center of the arrangement with respect to the diameter of the discharge ports that are arranged at the periphery of the arrangement is 0.7 or less, and
• wherein the substrate has first and second end faces and is provided with holes each extending from the first end face toward the second end face, and
• transferring the substrate to a position opposite to the nozzle before the fluid is discharged, and after fluid discharge is complete, transferring the substrate to a distant position from the position opposite to the nozzle, the nozzle being provided with discharge ports each discharging the fluid toward the first end face of the substrate.