Ultrasound welding device comprising vibration-decoupled counter tool

Patent metadata

Field	Value
Publication number	US-9505169-B2
Application number	US-201414647418-A
Country	US
Kind code	B2
Filing date	Jan 9, 2014
Priority date	Jan 17, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

The invention relates to an ultrasound welding device ( 1 ) for ultrasonic machining of a material by means of a sonotrode ( 2 ) mounted in a vibration-decoupled manner, which sonotrode comprises a sealing surface having a cylinder barrel shape, and a counter tool ( 8 ), wherein a converter is connected to the sonotrode ( 2 ) optionally via a first amplitude transformation unit and the sonotrode ( 2 ) and the first converter are designed in such a manner that the sonotrode ( 2 ) can be set into vibration by means of a natural vibration of the ultrasonic frequency f S .

First claim

The invention claimed is:

1. An ultrasound welding device ( 1 ) for ultrasonic processing of a material with a sonotrode ( 2 ) which is mounted in vibration-decoupled relationship and which has a sealing surface in the shape of a cylinder surface, and a counterpart tool ( 8 ), wherein a converter is connected to the sonotrode ( 2 ) optionally by way of a first amplitude transformation portion and the sonotrode ( 2 ) and the first converter are so designed that the sonotrode ( 2 ) can be caused to vibrate with a natural vibration of the ultrasonic frequency f S , wherein the counterpart tool ( 8 ) has a natural vibration of the ultrasonic frequency f G and is mounted in vibration-decoupled relationship in such a way that it can be excited with the ultrasonic frequency f G ,
a second converter is connected to the counterpart tool ( 8 ) optionally by way of a second amplitude transformation portion and the counterpart tool ( 8 ) and the converter are so designed that the counterpart tool ( 8 ) can be caused to vibrate with a natural vibration of the frequency f G ,
characterised in that the natural frequency f G is not equal to the frequency f S and is not an integral multiple thereof.

2. An ultrasound welding device ( 1 ) as set forth in claim 1 characterised in that there is provided a drive ( 4 , 10 ) for rotation of the sonotrode ( 2 ), wherein the sonotrode ( 2 ) is preferably of a substantially rotationally symmetrical configuration.

3. An ultrasound welding device ( 1 ) as set forth in claim 1 characterised in that there is provided a drive ( 4 , 10 ) for rotation of the counterpart tool ( 8 ), wherein the counterpart tool ( 8 ) is preferably of a substantially rotationally symmetrical configuration and has a sealing surface in the shape of a cylinder surface.

4. An ultrasound welding device ( 1 ) as set forth in claim 1 characterised in that the sealing surface of the sonotrode ( 2 ) and/or the sealing surface of the counterpart tool ( 8 ) are structured.

5. An ultrasound welding device ( 1 ) as set forth in claim 1 characterised in that the spacing between sonotrode ( 2 ) and counterpart electrode ( 8 ) is adjustable, wherein there is preferably provided an abutment so arranged that a minimum spacing between sonotrode ( 2 ) and counterpart tool ( 8 ) is observed.

Assignees

• Herrmann Ultraschalltechnik Gmbh & Co Kg

Inventors

• Herrmann Thomas

Classifications

• B29C65/087

  using both a rotary sonotrode and a rotary anvil · CPC title

• B29C66/92613

  the gap being kept constant over time · CPC title

• B29C66/9513

  characterised by specific vibration frequency values or ranges · CPC title

• B29C66/92431

  the pressure, the force or the mechanical power being kept constant over time (B29C66/92613 takes precedence) · CPC title

• B29C66/43122

  Closing the top of gable top containers (gable top containers B65D5/067) · CPC title