EXHAUST GAS CONVERTER, METHOD FOR THE MANUFACTURE OF AN EXHAUST GAS CONVERTER, RING PRESS FOR THE MANUFACTURE OF AN EXHAUST GAS CONVERTER, AND A TOOL THEREFOR

A method for manufacturing an exhaust gas converter comprises the steps of (S1) providing a cylindrical metal pipe, (S2) providing a cylindrical substrate surrounded in a circumferential direction by a mat mount, with the cross-section of the substrate including the mat mount being less or equal than the cross-section of the metal pipe, (S3) disposing the substrate with the mat mount surrounding the substrate inside the metal pipe, and (S5) applying a compression force to the metal pipe, the compression force being directed in a radial direction of the metal pipe for reducing the cross-section of the metal pipe to a given size. In the step (S5) of applying a compression force to the metal pipe, regions having the compression force applied thereon alternate with regions having no compression force applied thereon in at least one of the circumferential direction and the radial direction of the metal pipe. The number of regions where no compression force is applied to the metal pipe further exceeds the number of