Muffler and method for making a muffler

A method for making an exhaust muffler including a muffler housing defining a longitudinal axis (L) and having a peripheral wall elongated along said longitudinal axis (L);

• said peripheral wall having first and second end regions and first and second end walls at said first and second end regions, respectively;
• a muffler insert surrounded by said peripheral wall and supported thereon;
• said muffler insert having at least one retaining wall extending substantially in a direction of said longitudinal axis (L);
• said peripheral wall having a peripheral wall opening;
• at least one first exhaust-gas routing pipe having a first end region and being positioned with said first end region thereof engaging in said peripheral wall opening and being secured to said peripheral wall;
• said at least one first exhaust-gas routing pipe having a second end region and being secured by said second end region thereof to said at least one retaining wall;
• and, said at least one first exhaust-gas routing pipe being retained at said second end region on said at least one retaining wall by force closure or interlock, the method comprising the steps of:
• a) providing at least one muffler insert with at least one retaining wall and with at least one retaining-wall opening in the at least one retaining wall;
• b) providing at least one first exhaust-gas routing pipe;
• c) surrounding the at least one muffler insert with a peripheral wall of a muffler housing, a peripheral-wall opening being provided in the peripheral wall and assigned to the at least one retaining-wall opening;
• d) arranging the at least one first exhaust-gas routing pipe in such a manner that a first end region of the at least one first exhaust-gas routing pipe is positioned so as to engage in the peripheral-wall opening provided therefor, assigned to the at least one retaining-wall opening, and a second end region of the at least one first exhaust-gas routing pipe is retained in the at least one retaining-wall opening by force closure or interlocking;
• and,
• e) connecting the at least one first exhaust-gas routing pipe to the peripheral wall by material closure in the region of the peripheral-wall opening;
• wherein, in the course of step a), the at least one first exhaust-gas routing pipe is positioned so as to engage in the at least one retaining-wall opening;
• and, in the course of step d), is moved, with its first end region leading, from inside in the direction toward the peripheral-wall opening until the first end region is positioned so as to engage in the peripheral-wall opening and the second end region is retained on the at least one retaining wall by force closure or interlocking so as to engage in the at least one retaining-wall opening.