Ultrasound sealing unit for preventing interference of resonance frequencies of interfering oscillation

The invention relates to a method for steering resonance frequencies of interfering oscillation modes. The invention is applicable to that type of ultrasound sealing unit (1) which has a drive unit (2), centrally placed above the point of intersection between the two planes of symmetry (8) into whic...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	RAABE, MAGNUS
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CONVEYING FOR PERFORMING MECHANICAL WORK IN GENERAL GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL HANDLING THIN OR FILAMENTARY MATERIAL MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING TRANSPORTING UNPACKING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The invention relates to a method for steering resonance frequencies of interfering oscillation modes. The invention is applicable to that type of ultrasound sealing unit (1) which has a drive unit (2), centrally placed above the point of intersection between the two planes of symmetry (8) into which the sealing unit may be divided. The sealing unit (1) has reaction bodies (3) surrounding the drive unit (2), and a horn (4) with an elongate, narrow sealing surface (5). The sealing unit has a nodal plane between the reaction bodies (3) and the horn (4) in which plane the sealing unit is fixed with the aid of the anchorage edge (7). The resonance frequencies of the interfering oscillation modes which negatively influence the function of the sealing unit are steered in that symmetrically placed grooves (9) are provided in the reaction bodies (3). The grooves (9) are placed where the interfering oscillation modes have a maximum of potential, or alternatively a maximum of displacement.