Device for fluid tight sealing of tubular sections

摘要

An ultrasonic welding arrangement (48, 54) for sealing and cutting (60) pipes has welding faces (52, 86) with the same curvature. One face (86) is a groove that extends for the length of the tool and the other (52) is cylindrically convex. One face is smooth and the other has projections (96) with sides that include an angle between 5 and 20 [deg].