METHOD OF MANUFACTURING MUFFLER FOR INTERNAL COMBUSTION ENGINE

PROBLEM TO BE SOLVED: To provide a manufacturing method of a muffler for an internal combustion engine, restraining an increase in weight, reducing a radiation sound, and easy in installing a support. SOLUTION: A plurality of chambers are formed by partitioning the inside of an outer shell 2 formed by winding a plate material by separators 8 and 10. In that case, a plurality of first to third outer shells 30, 32 and 34 are formed by winding plate materials 40, 42 and 44 divided with respective separators 8 and 10 and different in the length corresponding to the number of turns or different in the plate thickness. Cylindrical parts 8a and 10a of the separators 8 and 10 forming the cylindrical parts 8a and 10a are inserted into the end of the first to third outer shells 30, 32 and 34. The first to third outer shells 30, 32 and 34 and the cylindrical parts 8a and 10a are superposed and welded, and the plurality of first to third outer shells 30, 32 and 34 different in the plate materials 40, 42 and 44 are joined via the separators 8 and 10. COPYRIGHT: (C)2007,JPO&INPIT