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Filters Ultrasonic Welding

Filters Ultrasonic welding: in the ultrasonics industry, filtration is the treatment of materials used to make objects that filtrate airliquids or dust.


One of the industries where ultrasonic equipment is most widespread is filters manufacturing. They are usually composed out of finely hatched polyamide fabrics capable to filtrate at a micrometric level, commonly adopted in the biomedical field.


Uses of filters ultrasonic welding


Usually, ultrasonic technology is employed in pleated filters, made mostly out of thermoplastic materials such as polypropylene or those lacking silicon treatments and handled to create filtering tubes of various sizes according to usage.


Filters’ size determine the choice of the sonotrodes frequency that will be needed in ultrasonic machinery.


Sonic Italia proposes a varied series of manual, semi or fully automated welding systems specialized in filters production.


They can integrate electronically controlled rotative (electric rotary tables) or linear solutions with brushless motors.


All of Sonic Italia’s ultrasonic applications developed by Sonic Italiacan be applied in clean rooms with or without soundproofing.


Advantages of filters ultrasonic knitting methods


By applying ultrasound technology it is possible to get steady, reliable results. These factors are a guarantee of using this cutting and searing process.


In addition, materials are not subjected to plastification stress of the welded areas during step by step ultrasonic welding operations.


Seam welding on the other hand, grants a linear and homogeneous outcome along the entire working path while speed is determined by fabrics’ thickness and GSM and the welding surface area.


Both welding processes imply an extremely low energy consumption.


Industrial applications of ultrasonic-welded filters


With ultrasonic technology it is possible to weld many different products, such as the following:

  • Single and multi-layered pleated filters;
  • Bag filters;
  • Plastic ring soldering on tube-shaped filters;
  • Air-oil filters ;
  • Filtering nets/fabrics;
  • Welding tubular filters;
  • Outer plastic protection for oil filters;

Medium filtering welding on metallic and/or aluminium frame

Semi-automatic ultrasonic welding system to weld the filtering sheet in the metallic and/or plastic cylindrical structure.

Rotary continuous welding system of pleated filters

This system is designed to weld ultrasonically every model of pleated filters and it much appreciated by the biggest societies of filters. We do continuous welding of pleated monolayer filters up to 7 layers, with 10 to 50 mm fold. The double puller makes it a lot easier work the operator’s work. The rotary ultrasonic welding system guarantees a stable welding, continuous, precise and leak-proof!

Ultrasonic welding of felt on oil filters

This ultrasonic welding system is designed and created for societies that need to weld the feld on both side of the oil filter. Sonic creates ultrasonic welding solutions according to the customer’s needs.

Ultrasonic welding systema for pocket filter

Sonic Italia gives welding systems to be integrated in specific automations. In this case we weld ultrasonically a plastic structure of poket filters.

Ultrasonic bonding of synthetic fabrics

Ultrasonic technology allows to weld together many layers of fabrics, like nonwoven tissue. Ultrasonic bonding is developed from 250 up to 2000 mm lenght. Using one or more ultrasonic systems in the upper part of the hardened steel moving cylinder with a customized pattern, different layers of fabrics go through the sonotrode and the cylinder, melting together.
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