Ultrasonic welding

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Advantages of the Ultrasonic Technology

ultrasonic production

The production of packaging bags using ultrasound is an economical and, above all, a process-efficient solution that allows new ways to go in many directions.

  • Quality Control of every welding by energy measurement (min/max)

  • High Process Speeds are nearly independent of the film thickness (up to 200 cycles per minute)


Ultrasonic sonotrode table

The table consists of segments, i.e. individual flat sonotrode blocks. Various shapes and sealing seam lines can be individually generated across any place within the whole sealing area. The sonotrode table is rigidly installed in the machine. Its entire width can universally be used by simple changing the welding tools. Various product contours result from the welding tool design and not from the sonotrode.

Quick change of welding tools

The tools are simply pushed in and out of the welding press and so precisely locked in their positions. Since the tools can be changed using minimum time and effort, you can easily reset the machine in the case of a new product. So you avoid long standby times and waiting for warming-up the tools. Therefore, the ultrasonic welding technology is referred to as a "cold" welding system.

No wrinkling

Cold welding or “cooled sealing" means no wrinkles in the material. So you get extremely flat and strong welded seams of excellent quality and appearance. Similar to HF welding, ultrasonic welding is a method of heating the film in the seam area from the inside by creating a high frequency mechanical vibration. Unlike ultrasonic welding, in thermal-contact welding the heat is applied from outside. Therefore, the applied heat should be higher than the melting point of the material. This leads to overheating and causes strong wrinkles in the material.

Cold welding tools

prevent film damage during machine downtime.

Ultrasonic sealing of PP, PVC, PE, PET films, as well as non-woven and barrier films, with impressive results. Performance adjustment depending on welding tasks by using 20, 30 or 35 kHz technology.

Digitally controlled sealing process

facilitates easy reproducing the welding parameters and thus a quick product change.

Low energy consumption

The ultrasonic welding method consumes many times less energy than the thermal-contact welding, since the seams are welded in a single process step and the energy is only supplied during the effective welding time (a split second).