Patent ID: 6591498
Filing Date: 2003-07-15
Classification: F01N,Y10T

Abstract:
A method of producing a catalytic converter, comprising:providing a shock absorbent member wrapped around an outer periphery of a catalyst substrate; inserting the catalyst substrate and the shock absorbent member into a cylindrical workpiece; reducing a diameter of a body portion of the cylindrical workpiece covering at least a portion of the shock absorbent member to hold the catalyst substrate in the cylindrical workpiece; fixing the cylindrical workpiece to prevent the cylindrical workpiece from being rotated about a longitudinal axis thereof; and spinning at least an end portion of the cylindrical workpiece, by means of a plurality of spinning rollers, which are evenly positioned around the outer periphery of the end portion, and which are revolved about the axis of the end portion along a common circular locus, and moved in a radial direction of the end portion; and moving the plurality of spinning rollers in an axial direction of the end portion to reduce a diameter of the end portion along the axis thereof, and thereby form a neck portion of the cylindrical workpiece.