Stamp-sealing unit and ultrasonic processing device comprising same

Stamp-sealing unit with a punch formed as a sonotrode (8) and a die (5), wherein the die (5) has an opening (15) and the punch can be moved into and out of the opening (15) in the stamping direction, characterized in that a sonotrode plate (1) is provided with a sonotrode plate opening for accommodating the sonotrode, wherein the sonotrode (8) has a flange (10), and the sonotrode plate opening has an inner contour with a stop surface and the flange has an outer contour with a stop surface, wherein the two stop surfaces are formed corresponding to each other with the result that, when the sonotrode is accommodated in the sonotrode plate opening, the stop surfaces lie against each other, wherein the inner contour has an inner cone and the outer contour has an outer cone which is formed corresponding to the inner cone.