Ultrasonic

Environmentally friendly and energy-efficient joining technology

Ultrasonic technology, compared to other thermal processes, is fast, efficient and environmentally friendly in the processing of thermoplastics, films and fabrics. Our products are used in all plastic processing industries, for example automotive interior and exterior, filtration, hygiene, technical textiles, packaging, but also in environmental technology.

How does ultrasonic work?

The ultrasonic frequency is generated in a generator. The generator converts mains voltage into high-frequency high voltage and transmits this to the oscillating unit, which consists of the converter, the booster (amplitude transformation piece) and the sonotrode (welding tool). The converter electrostatically converts the incoming voltage into mechanical oscillations of the same frequency and transmits them to the workpiece via the booster and sonotrode. Absorption of the vibrations causes interfacial and molecular friction in the joining or separating zone when pressure is applied and the mechanical vibrations are introduced vertically. The result is local heating of the workpiece material in the joining zone. This plasticization allows one or more workpieces to be welded either continuously or in cycles, punched, riveted or embossed.

In addition, ultrasonic offers another application in environmental technology with the treatment of biosolids: instead of local heating, ultrasonic creates intense cavitation bubbles in the liquids. The implosion of the cavitation bubbles affects the liquid and thus better converts or sterilizes e.g. biological mass.

The ultrasonic generator produces the electrical ultrasonic oscillations: To do this, it raises the mains voltage from 230 volts to approximately 1,200 volts. In addition, the generator increases the frequency of the AC voltage from 50 hertz to 20,000 to 35,000 hertz. It transfers this to the oscillating unit, which consists of a converter, a booster (amplitude transformation piece) and a sonotrode.

The converter transforms the incoming electrical oscillations into mechanical oscillations of the same frequency. Via the booster, which keeps the mechanical oscillation the same or amplifies it, it reaches the sonotrode. The sonotrode is the actual welding tool; it moves 20,000 to 35,000 times per second by a few micrometers and introduces the ultrasonic vibrations into the part.

When the mechanical vibrations are introduced vertically and pressure is applied, the plastic absorbs the vibrations in the joining zone. This friction in the interface and the molecules causes local heating in the joining zone of the material, so that one or more workpieces can be ultrasonically welded, riveted, cut or punched.

Technologies

Ultrasonic welding Ultrasonic cut & seal Ultrasonic roll seam welding Ultrasonic cutting Ultrasonic punching Ultrasonic riveting Ultrasonic embossing US thermofixing Ultrasonic washing Ultrasonic disintegration

Registration for training

We offer training for the qualified use of our technologies and machines at the company location in Karlsbad, via webinar or at your site.