FIELD: electricity.
SUBSTANCE: sonotrode (1) includes the following: head (15) that determines sealing-up surface (14) continued along the first direction (A), and the first and the second actuator (12), which are separated from each other. Each actuator includes at least one piezoelectric element (13). The first and the second actuator (12) can be provided with electricity by means of a single generator with a possibility of generation of head (15) oscillation. Height (H) of head (15), which is measured along the second direction (B) perpendicular to sealing-up surface (14), is generally equal to half length of the wave oscillating in the direction of the second direction (B). Besides, sonotrode (1) includes at least one slot (23) that is continued through head (15) perpendicular to the first and the second directions (A, B). The sonotrode includes at least finite number of node points (20), at which the amplitude of oscillation of head (15) is generally equal to zero, and plane (P), on which at least several node points (20) lie, and which divides head (15) into the first section (21) and the second section (22). Slot (23) is located at a certain distance near plane (P).
EFFECT: according to the invention, technical result achieved at use of a sonotrode consists in the fact that it can produce a rather long sealing-up strip, and the vibration of which is almost not subject to action of additional spurious frequencies.
13 cl, 11 dwg
