Method for ultrasound welding of two bag foils with a spout
The invention relates to a method for ultrasound welding of two bag foils to a spout, wherein at a first method step, a lateral edge of a bag foil abutting the spout is welded to the spout with a first oscillating structure, at a second method step, the lateral edge of the second bag foil abutting the opposite side of the spout is welded to the spout with a second oscillating structure, and at a third method step, the lateral edges of the two bag foils located next to the spout are welded to each other with a third oscillating structure.
1. A method for ultrasound welding of a first and a second bag foil to a spout, comprising the steps of:
at a first method step, welding a lateral edge of the first bag foil abutting a first side of the spout to the spout with a first oscillating structure,
after completion of the first method step, at a second method step, welding a lateral edge of the second bag foil abutting a second side of the spout opposite the first side to the spout with a second oscillating structure, and
at a third method step, welding lateral edges of the first and second bag foils located next to the spout together with a third oscillating structure.
2. The method of claim 1 , wherein at the first method step the first oscillating structure is placed in contact with the lateral edge of the second bag foil abutting the spout.
3. The method of claim 1 , wherein at the second method step, the second oscillating structure is placed in contact with the lateral edge of the first bag foil abutting the opposite side of the spout.
4. The method of claim 1 , wherein the first, second and third oscillating structures are each supported on a corresponding anvil in one-to-one correspondence.
5. The method of claim 1 , wherein the first, second and third oscillating structures for welding the spout comprise an ultrasound welding tool.
6. The method of claim 1 , wherein at the first and the second method step only a partial region of the spout is welded to the lateral edges of the first and second bag foils.
7. The method of claim 6 , wherein at the third method step a remaining region of the spout is welded to the lateral edges of the first and second bag foils, and abutting lateral edges of the first and second bag foils are welded together.
8. The method of claim 1 , wherein at the first and second method step, the spout is welded to the lateral edges of the first and second bag foils abutting the spout, and partial regions of the lateral edges of the first and second bag foils extending from the spout are welded to each other.
9. The method of claim 8 , wherein at the third method step, remaining regions of the lateral edges of the first and second bag foils are welded to each other.
10. The method of claim 1 , wherein the second and the third method steps are performed simultaneously.
11. The method of claim 10 , wherein the second and the third method step are performed simultaneously using a combined second and third oscillating structure.
12. The method of claim 1 , wherein at the first method step the second oscillating structure operates as an anvil for the first oscillating structure.
13. The method of claim 1 , wherein at the second method step the first oscillating structure operates as an anvil for the second oscillating structure.