Device for the ultrasonic processing of materials having a trigger apparatus

Patent metadata

Field	Value
Publication number	US-9833946-B2
Application number	US-201515312334-A
Country	US
Kind code	B2
Filing date	Jul 20, 2015
Priority date	Jul 28, 2014
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

The present invention relates to a device for the ultrasonic processing of materials, which has an ultrasonic processing system, which comprises: an ultrasound generator, a converter ( 12 ), a sonotrode ( 16 ), and a counter tool ( 18 ); wherein the sonotrode ( 16 ) and/or the counter tool ( 18 ) has a substantially cylindrical sealing surface having at least one elevation ( 45 ) and can be rotated such that, during the processing, the elevation ( 45 ) rotates about the axis of rotation and comes in contact with the material web ( 20 ) during a sealing time, wherein a control apparatus ( 24 ) is provided for the ultrasound generator, to which control apparatus a feedback variable from the ultrasound processing system is fed and which control apparatus determines a manipulated variable therefrom and feeds said manipulated variable to the ultrasound generator, wherein a process variable from the processing process is determined and is linked to the manipulated variable determined by the control apparatus ( 24 ) before the feeding to the ultrasound generator. In order to provide an improved device for the ultrasonic processing of materials having an ultrasonic processing system, a trigger apparatus ( 44 ) is provided, which determines the position of the elevation ( 45 ) and is designed to permit or prevent the linking of the process variable to the manipulated variable in accordance with the position determination.

First claim

The invention claimed is:

1. Apparatus for the ultrasonic processing of materials having an ultrasound processing system comprising an ultrasound generator, a converter ( 12 ), a sonotrode ( 16 ) and a counterpart tool ( 18 ), wherein the sonotrode ( 16 ) and/or the counterpart tool ( 18 ) has a substantially cylindrical sealing surface having at least one raised portion ( 45 ) and is rotatable so that the raised portion rotates about the axis of rotation during the processing operation and during a sealing time comes into contact with the material web ( 20 ), wherein there is provided a closed-loop control device ( 24 ) for the ultrasound generator to which a feedback variable is fed from the ultrasound processing system and which ascertains therefrom an adjusting variable and feeds it to the ultrasound generator, wherein a process variable is ascertained from the processing process and is linked to the adjusting variable ascertained by the closed-loop control device ( 24 ) prior to the feed to the ultrasound generator, characterised in that there is provided a trigger device ( 44 ) which determines the position of the raised portion ( 45 ) and is adapted to permit or prevent linking of the process variable to the adjusting variable in dependence on the position determination.

2. Apparatus as set forth in claim 1 characterised in that the trigger device is so adapted that it permits linking of the process variable to the adjusting variable when the raised portion ( 45 ) comes into contact with the material ( 20 ) to be processed and prevents same when the raised portion ( 45 ) does not come into contact with the material ( 20 ) to be processed.

3. Apparatus as set forth in claim 1 characterised in that the trigger device ( 44 ) is so adapted that while linking of the process variable to the adjusting variable is prevented instead a predetermined reference value is linked to the adjusting variable.

4. Apparatus as set forth in claim 3 characterised in that the predetermined reference value is established as that value of the process variable, that had been detected immediately before the trigger device ( 44 ) allows linking.

5. Apparatus as set forth in claim 1 characterised in that the trigger device ( 44 ) has a sensor ( 43 ) for determining the position of the raised portion.

6. Apparatus as set forth in claim 1 characterised in that the process variable is the processing force of the sonotrode ( 16 ).

7. Apparatus as set forth in claim 1 characterised in that the raised portion ( 45 ) is of a substantially elongate shape which is oriented axially on the sealing surface.

8. Apparatus as set forth in claim 2 characterised in that the trigger device ( 44 ) is so adapted that while linking of the process variable to the adjusting variable is prevented instead a predetermined reference value is linked to the adjusting variable.

9. Apparatus as set forth in claim 2 characterised in that the trigger device ( 44 ) has a sensor ( 43 ) for determining the position of the raised portion.

10. Apparatus as set forth in claim 3 characterised in that the trigger device ( 44 ) has a sensor ( 43 ) for determining the position of the raised portion.

11. Apparatus as set forth in claim 4 characterised in that the trigger device ( 44 ) has a sensor ( 43 ) for determining the position of the raised portion.

12. Apparatus as set forth in claim 2 characterised in that the process variable is the processing force of the sonotrode ( 16 ).

13. Apparatus as set forth in claim 3 characterised in that the process variable is the processing force of the sonotrode ( 16 ).

14. Apparatus as set forth in claim 4 characterised in that the process variable is the processing force of the sonotrode ( 16 ).

15. Apparatus as set forth in claim 5 characterised in that the process variable is the processing force of the sonotrode ( 16 ).

16. Apparatus as set forth in claim 2 characterised in that the raised portion ( 45 ) is of a substantially elongate shape which is oriented axially on the sealing surface.

17. Apparatus as set forth in claim 3 characterised in that the raised portion ( 45 ) is of a substantially elongate shape which is oriented axially on the sealing surface.

18. Apparatus as set forth in claim 4 characterised in that the raised portion ( 45 ) is of a substantially elongate shape which is oriented axially on the sealing surface.

19. Apparatus as set forth in claim 5 characterised in that the raised portion ( 45 ) is of a substantially elongate shape which is oriented axially on the sealing surface.

20. Apparatus as set forth in claim 6 characterised in that the raised portion ( 45 ) is of a substantially elongate shape which is oriented axially on the sealing surface.

Assignees

• Herrmann Ultraschalltechnik Gmbh & Co Kg

Inventors

• Gnad Gerhard

Classifications

• B29C65/087

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

• B29C66/9221

  by measuring the pressure, the force or the mechanical power · CPC title

• B06B2201/72

  Welding, joining, soldering · CPC title

• B29C65/086

  using a rotary anvil · CPC title

• B29C65/085 Primary

  using a rotary sonotrode · CPC title