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Ultrasonic welding


Ultrasonic welding continues gaining importance thanks to the constant development of the plastic industry.
Using ultrasonic welding, you obtain the best result with a simple and and extremely clean technology.


Ultrasounds welding

Ultrasonic welding solutions for different applications in various industries.


Sonic Italia Ultrasonic welding

This video shows the process of welding with ultrasonics of a TPU component for the automotive industry.


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20017 RHO (MI) Italia



The ultrasonic welding guarantees a secure and durable plastic joining, also with long periods of life. Visit our page.

This technology has also contributed to the creation of those products designed to be permanently assembled - it refers to the conscious decision to lose the possibility of a future disassembly and repair - for common consumer products.

Another important sector where ultrasonic technology is used is the production of disposable products for hygienic purposes, for example in the medical field. 


How ultrasonic welding works?


Ultrasonic vibrations at a frequency from 20 to 40 kHz are created by a power generator which is supplied with the normal mains current at 50 Hz.

A converter then changes the high-frequency vibrations, coming from the generator, into mechanical vibrations - comparable to a extremely fast micro hammering.

The constant amplitude produced by the converter is changed or moved through the booster, according to the needs of the application.
Finally, the sonotrode transmits the high-frequency vibration energy to the welding surface.


Under the influence of the pressure applied on the plastic components, the vibrations are converted into heat, thanks to the frictional movement of the surfaces on their contact point and the absorption of the ultrasonic waves.
The material of both parties melts, forming almost homogeneous high strenght joints.

The molten material and the resultant force of connection can be positively influenced by adjusting the amplitude or the applied force. 
Various systems are available on the market for ultrasonic welding working according to this principle: from compact units to standard machines and ssystems built for a specific production. This method is fast, efficient and environmentally friendly, because it requires no tapes or adhesives.


Different applications of the ultrasonic technology

In addition to the welding of surfaces, the ultrasonic welding process can be used for riveting, for spot weld or the insertion of metal components in the plastic material. 
Other common uses are cutting and sealing of the edges of thermoplastic films and synthetic fabrics, as well as the slicing and cutting without waste in the food production.





Nonwovens ultrasonic welding
Ultrasonic welding solutions for welding non-woven fabrics. Materials can be 100% acrylics or blends.

Plastic assembly systems
Ultrasonic plastic assembly is used when  high aesthetic quality and high production speed are required.

Ultrasonic bonding
Customized ultrasonic bonding solutions for synthetic fabrics and non-wovens.

Ultrasonic cutting
Sonic Italia manufactures up to date machines for ultrasonic cutting of thermoplastic materials.

Ultrasonic food cutting
Ultrasonic blades suitable for almost all kind of food cutting with different frequencies.

Ultrasonic sealing
Ultrasonic technology generates the heat for a friction process and for sealing process from within the plastic film.

Ultrasonic sewing machine
The ultrasonic process is versatile - you can seam, cut, slit, trim, tack, emboss, or cut and seal simultaneously. 

Ultrasonic slicer
Ultrasonic cutting systems integrated in automatic or semi automatic slicers.

Ultrasonic slitting
Ultrasonic slitting is the most efficient solution for a clean cut which prevents unraveling.

Ultrasonic tools
Ultrasonic tools for customised solutions for cutting and welding.

Ultrasonic welding
Sonic Italia produces ultrasonic machines for welding thermoplastics, which can be applied in several industries.

Hand-held Ultrasonic Welder
Manual ultrasonic cutting and welding solution for manual cutting and spot welding.

Manure Belt Welder
Discover more about our manual ultrasonic welder designed for manure and egg conveyor belts.

Ultrasonic cutting sealing films fabrics
Ultrasonic sealing of films and fabrics: applications in clothing industry, non-woven, packaging and textile.

Ultrasonic Insertion
Ultrasonic insertion of a threaded brass rivet  in a plastic component.

Ultrasonic blades
Sonic Italia internally produces the ultrasonic blades with different shapes and designs.

Ultrasonic Linear Circular Weaving Cutter
Ultrasonic linear and weaving cutter. Ideal for manufacturing rafia products.

Ultrasonic Punching
Ultrasonic punching solutions for plastic, acrylics and filtration fabrics.

Ultrasonic Rotative Bonding System For Pleated Filters
The rotary bonding system designed for pleated filters is "green" because it does not require the use of solvents or adhesives.

Ultrasonic Sonotrode
Ultrasonic sontorodes: thirty years' experience in manufacturing customized sonotrode.

Ultrasonic Spot Welding
Ultrasonic spot welding is possible both in automations and manually.

Ultrasonic Stud Welding
Ultrasonic Stud Welding is the suggested option when similar plastics parts need to be welded at single or multiple localised points.


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