Ultrasound welding device and method for welding material webs
AssigneeHerrmann Ultraschalltechnik GmbH & Co. KG
InventorKlaus Weiler
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Abstract
The present invention relates to an ultrasound welding device for welding material webs, for example, films, having an anvil (1) with an anvil welding surface, and a sonotrode (2) with a sonotrode welding surface, wherein the anvil is movable relative to the sonotrode. In order to provide an ultrasound welding device that reacts promptly to changes in material thickness and properties of the material to be welded, the invention proposes to provide a counterforce generator, which exerts a counterforce on the anvil in the direction of the sonotrode, if the anvil is moved out of a reference position away from the sonotrode.
Claims15
An ultrasound welding device for welding material webs such as for example films having an anvil (1) with an anvil welding surface and a sonotrode (2) having a sonotrode welding surface, wherein the anvil is movable relative to the sonotrode and there is provided a counterforce generator which exerts a counterforce on the anvil in the direction of the sonotrode if the anvil is moved out of a reference position away from the sonotrode, characterised in that there is provided an abutment element which is so arranged that it limits the movement of the anvil in the direction of the sonotrode so that the anvil welding surface maintains a target minimum spacing relative to the sonotrode welding surface, that is fixed by the abutment element.
Dependencies are inferred from the claim text.