Industrial cleaning equipment: characteristics and applications of ultrasonic cleaning technology

Compared with other cleaning, ultrasonic cleaning has the advantages of high cleaning rate, less residue, short cleaning time, and good cleaning effect. Ultrasound has a cleaning effect on all parts to be cleaned that can be immersed in liquid. It is not limited by the surface shape of the cleaning parts, such as deep holes, slits, and grooves. Can be cleaned. Because the ultrasonic generator adopts Class D working amplification, the electroacoustic efficiency of the transducer is high, so ultrasonic cleaning is highly efficient and energy-saving. It is a real high-speed, high-quality cleaning technology that can be easily automated. If the cleaning agent is non-ODS cleaning agent, it has a green cleaning effect. Ultrasonic cleaning has a good cleaning effect on objects with strong reflection such as glass and metal, and is not suitable for materials with strong sound absorption such as textiles, porous foam plastics, and rubber products.

Compared with various chemical, physical, electrochemical and ultrasonic cleaning physical and chemical cleaning methods, ultrasonic cleaning has the following unique advantages:

It can quickly and thoroughly remove all kinds of dirt on the surface of the workpiece.

Can clean precision parts with cavities, grooves and other complicated shapes.

No damage to the surface of the workpiece.

A variety of cleaning agents can be used.

It can be cleaned at room temperature or properly heated (around 60°C).

The integrated structure of the whole machine is easy to move.

Save solvents, clean paper, energy, work space, labor, etc.

Application:

Application of Ultrasound in the Electronics Industry

The electronics industry is the earliest and most popular industry in the application of ultrasonic cleaning.

Electronic parts cleaning: electronic parts, such as semiconductor tube housing, IC housing, crystal housing, relay housing, electronic tube housing, etc.

The substrate cleaning of electronic components: The substrate of electronic components is made of semiconductor materials and encapsulated in a metal or plastic housing. Before packaging, not only the housing must be cleaned, but also the substrate must be cleaned. Cleaning, such as IC chips, resistors, crystals, semiconductors, original film circuits, etc.

PCB cleaning: In my country's electronics industry, most companies use PCBs. The fluxes used for PCB component welding are divided into three types: water-soluble, rosin and no-clean. The most used are the first two An ultrasonic cleaning machine is mostly used. The no-clean type should not be cleaned in principle. However, most manufacturers in the world still need to clean even if they use no-clean flux to solder components. Especially for high-density PCBs and high-density IC pins that are not cleaned or ultrasonically cleaned, it will inevitably cause dust to be adsorbed between the high-density circuits and IC pins. Once the environmental humidity is high, high-density lines and pins are prone If the environment is dry, the short-circuit fault disappears by itself, and this type of fault is not easy to find. Therefore, electronic complete machine factories all over the world insist on ultrasonic cleaning of PCB boards. In our country, the military electronics factory has begun to promote it, and has received the dual benefits of improving product reliability and reducing after-sales service costs. In the production of connectors, connectors, adapters and other devices, they must also be cleaned before electroplating and assembly, otherwise the dust and oil adsorbed on these assembled parts will inevitably affect their electrical conductivity and insulation performance, especially some complex multi-core This is especially true for connectors.

Cleaning after processing and shaping of electronic materials: electronic materials such as wafers, silicon wafers, piezoelectric ceramic sheets are products supplied to component manufacturers, and their products must be cleaned before they leave the factory, especially those that do export business, their products are cleaned Become a big problem, ultrasonic cleaning is the most effective way.