Tuesday, July 31, 2018

How to Buy the Right Ultrasonic Cleaner for Your Application – Part I

Industrial ultrasonic cleaners can effectively clean parts rapidly and completely if they are correctly configured for the specific cleaning application.

An ultrasonic cleaning system typically consists of a signal generator, a transducer, and a cleaning tank. Each component of an ultrasonic cleaning system should be carefully selected, and they must work together so that the entire system can clean parts and tools effectively.

Cleaning application – Ultrasonic cleaners usually remove light contamination like dust, films, and residues quickly and effectively. For cleaning parts that have heavy contamination (such as grease), the application of heat or mild solvents may be added.

Size and power – Effective cleaning also depends on the size of the parts to be cleaned, as well as the power selection. For bigger parts or parts that have unusual shapes, a custom-made tank may be appropriate. Naturally, bigger tanks will require more power than tanks of a standard size. However, too much power can cause pitting on the surfaces of the parts being cleaned, that's why selecting the right amount of power is as important as selecting the right tank size. The bottom line is that the ultrasonic waves need to be evenly distributed in the cleaning tank so that it can clean parts thoroughly and effectively.

Since industrial ultrasonic cleaning is carried out by the high-frequency sound waves in the cleaning solution, the cleaning tank (and the parts inside it) may vibrate slightly as cleaning takes place. This means that the parts should be suspended in the cleaning solution to avoid contact with the walls and the bottom of the cleaning tank, as even slight vibrations can cause damage.

Do you have questions? For more details read the complete article, “How to Buy the Right Ultrasonic Cleaner for Your Application – Part I”. You may also call Kaijo at 408-675-5575 or email info@kaijo-shibuya.com if you have questions or would like to discuss your industrial cleaning needs.

Tuesday, July 24, 2018

Selecting an Ultrasonic Transducer for Your Cleaning Application

An ultrasonic cleaning system consists of a generator, an ultrasonic transducer, and a cleaning tank.

The role of the ultrasonic cleaning transducer is to transform an electrical high-frequency signal from the generator into ultrasonic sound waves in the cleaning solution contained in the tank.

Kaijo's ultrasonic cleaning transducers are made up of an electrical section that receives the electrical high-frequency signal from the generator and a mechanical section that vibrates at a high frequency. Once received, the electric signal is applied across piezoelectric crystals which change the signal into vibrations.

When the transducer is immersed in the liquid or cleaning solution, these vibrations result in corresponding ultrasonic waves in the solution. These ultrasonic waves travel through the liquid as compression peaks and troughs. Cavitation bubbles form in the troughs because of the low pressure, and they collapse again in high-pressure peaks. As bubbles collapse, they release an extremely powerful jet of cleaning solution that dislodges dirt, grime, and other forms of contaminants from the surface of the parts that are being cleaned in the solution.

These bubbles create a fast and effective cleaning action without damaging the underlying surface; they can clean even in the most inaccessible areas of the parts being cleaned. The result is rapid, efficient and thorough cleaning.

Types of ultrasonic cleaning transducers:
  • Immersible transducer – A more flexible type of transducer, it can be placed in any tank in the cleaning solution. It can be positioned horizontally or vertically, as long as it is completely submerged in the liquid.
  • Bolt-on or mounted transducer – It is permanently installed onto the walls or bottom of the cleaning tank.

For more details read the complete article titled “Selecting an Ultrasonic Transducer for Your Cleaning Application”. If you have questions about Kaijo’s ultrasonic transducers or would like to discuss the specific cleaning requirements for your application call 408-675-5575 or email info@kaijo-shibuya.com.

Monday, July 2, 2018

How Ultrasonic Generators Work to Provide Optimum Cleaning Results

The role of an ultrasonic generator is essential since it generates the high-frequency electric signal that is required for an ultrasonic cleaning system to operate efficiently. These devices will produce frequencies that range between 20 kHz up to 1 MHz. Ultrasonic generators also ensure that the selected power and frequency are properly controlled and maintained.

Ultrasonic cleaning systems work by creating high-frequency sound waves within a cleaning solution to remove surface contaminants and dirt from various parts and devices. The parts and components being cleaned are immersed within a cleaning tank. When the right frequency is selected, the ultrasonic cleaning system will clean the parts and components quickly and effectively – even for items that have holes, irregular shapes, curves and crevices.

The cleaning performance of the ultrasonic cleaning system depends on the action of the cavitation bubbles created by the high-frequency sound waves within the cleaning solution. These bubbles are formed in the wave pressure troughs and disappear in the pressure peaks – this action creates a powerful and intense scrubbing and cleaning action, dislodging contaminants from the surface of the immersed parts.

An Ultrasonic generator needs to fit the production environment and also match cleaning application requirements. Once the specific cleaning application requirements are defined, selecting the right ultrasonic generator which produces the appropriate frequency, as well as the corresponding transducers and cleaning tank is
clear. If an ultrasonic cleaner is used the same way, to clean one kind of part made of the same material with the same contaminants, a single-frequency generator is usually the most cost effective option. The power of the ultrasonic generator must also be high enough to fill the cleaning tank with ultrasonic waves and the design must ensure that the wave pattern is uniform for effective cleaning.

For further details read the complete article titled “How Ultrasonic Generators Work to Provide Cleaning Results”. Call Kaijo at 408 675-5575 or email info@kaijo-shibuya.com for a free quote or consultation on selecting the right ultrasonic generator and system for your cleaning application.

Monday, June 25, 2018

How to Select the Right Type of Ultrasonic Cleaner

Industrial ultrasonic cleaners come in various types with different configurations and characteristics that are determined by the cleaning application. The size, power, frequency, and controls of each ultrasonic cleaner will influence its cleaning capabilities. It’s important to choose the right type of ultrasonic cleaner to achieve the best (and the most desirable) cleaning performance possible.

Ultrasonic cleaners come in different types which include:

  • Desktop system – suitable for cleaning small parts of one type with the same contaminants.
  • Bench top system – a larger system that can be an integrated turnkey system or assembled from individual components. It can clean a wide array of parts and remove different kinds of contaminants.
  • Large industrial system – consists of tanks that can accommodate large or bulky products. In this system, ultrasonic generators are mounted separately, and several transducers may require filling the tank with the ultrasonic sound waves.

The cleaning frequency is essential for the removal of dirt and contaminants. Low frequencies deliver robust cleaning action but can damage delicate parts. High frequencies, on the other hand, deliver provide gentler cleaning but may take a longer time to remove contaminants.

In order to insure that the industrial ultrasonic cleaner works as expected for a specific cleaning application, the right frequency and power must be provided. For existing cleaning tanks, a separate immersible transducer is typically the easiest solution. For new cleaning tanks, a built-in transducer is mostly preferred to avoid problems with transducer placement and vibrations.

Optional measures such as using heat and/or using mild cleaning chemicals can help in dissolving and removing more difficult contaminants. Heat is often useful in cleaning applications that involve heavy contamination that include grease and oil since higher temperatures soften these contaminants so they are easier to remove.

For more details on this topic read the complete article “How to Select the Right Type of Ultrasonic Cleaner”. For help with selecting the right ultrasonic cleaner for your application contact Kaijo for a free consultation or quote at 408-675-5575 or email info@kaijo-shibuya.com.

Thursday, May 31, 2018

How Ultrasonic Cleaning Systems Are Used to Clean Industrial Lenses

Ultrasonic cleaning systems can effectively clean glass lenses, however due to the special characteristics of lenses, selecting the correct ultrasonic frequency, power and bath is critical.

Industrial lenses that are made of pure glass are ideal candidates for ultrasonic cleaning. The ultrasonic generator produces high-frequency electronic signal, and the transducer immersed in the ultrasonic bath converts that signal to ultrasonic waves within the liquid.  The waves within the cleaning bath generate cavitation bubbles in the pressure troughs, and then they collapse in the pressure peaks. The action of the cavitation bubbles produces a powerful scrubbing and cleaning action against the hard surfaces of the lenses, dislodging contaminants from the surface.

While glass itself would not be affected by ultrasonic cleaning systems, it may have been treated with a special coating or surface treatments that can be damaged at certain frequencies, in heated baths or when used with added detergents.

Lower frequencies – Produce larger cavitation bubbles with a more robust cleaning action.

High frequencies – Produce smaller cavitation bubbles with a gentler cleaning action.

The power produced by the ultrasonic system affects the cleaning time. If the power is too low, too few bubbles are generated, and the cleaning process will take longer. The power level should be exactly enough so that it can produce the maximum amount of cavitation bubbles that will allow the quickest and most thorough cleaning action on industrial lenses.

Robust cleaning with the addition of detergents and/or heat will speed up the cleaning process on pure glass lens. However, if the lens has any coating, the same cleaning measures may damage the lens coating. Thus, the required frequency for cleaning coated glass lenses must be high enough to avoid damaging coatings that are softer than pure glass.

The complete article, “How Ultrasonic Cleaning Systems Are Used to Clean Industrial Lenses” goes into more detail. If you would like additional information, or have questions, please contact Kaijo through email at info@kaijo-shibuya.com or call (408) 675-5575.

Friday, May 18, 2018

How Long Will Ultrasonic Cleaning Take to Clean My Parts?

The amount of time required for an ultrasonic cleaning system to clean a part depends on the system, the material the part is made of and the nature of the contaminants. Typically, industrial ultrasonic cleaners can complete common cleaning tasks between ten and twenty minutes.

While cleaning time depends on the power of the system, the material the parts are made from and the degree of contamination also impact the cleaning time. For a light cleaning action, it may take just a few minutes. When cleaning parts that are covered with substantial deposits of hardened grease or carbon, cleaning will take much longer.

Frequency is also a factor that determines how quickly some 
industrial ultrasonic cleaners can take to clean. A high frequency (100 kHz and above) is ideal for cleaning delicate parts such as semiconductors, while a lower frequency (20 to 40 kHz) is ideal for cleaning more robust components like greasy machine parts. Cleaning parts under high frequency (which produces smaller cavitation bubbles and a gentler cleaning action) will take longer. On the other hand, a low frequency (which produces bigger cavitation bubbles and a more robust cleaning action) allows for quicker cleaning.

The power provided by a 
high-performance ultrasonic cleaner is another factor that affects the system's cleaning speed. A power that's too low generates fewer cavitation bubbles and thus, cleaning time will take longer. Providing the right level of power for the specific size bath will produce the most cavitation bubbles, leading to the fastest cleaning action.

You can learn more about the length of time required for ultrasonic cleaning parts by reading our complete article “How Long Will Ultrasonic Cleaning Take to Clean My Parts.” If you have questions or would like additional information, please contact Kaijo at (408) 675-5575 or email info@kaijo-shibuya.com.

Monday, April 30, 2018

What Is the Definition of Ultrasonic and Megasonic Frequency?

Sound exists at much higher frequencies, which includes both ultrasonic and megasonic ranges. While these may not be audible to human hearing, these frequencies can be used in practical applications in megasonic and ultrasonic cleaning systems.

So how do megasonic and ultrasonic cleaning systems work? When liquids and gases are subjected to high-frequency sound at powerful energy levels, it leads to the formation of microscopic tears in these mediums.

When megasonic or ultrasonic sound energy goes through these mediums, it causes the microscopic tears to form into bubbles every second, and these bubbles collapse quickly. This process is known as “cavitation.”

Cavitation bubbles are high-energy bubbles. As each of these bubbles forms and collapses quickly, it generates shockwaves. When you place an object into these cavitation bubbles, it tends to be subjected to the energy of these implosions. These cavitation bubbles are so powerful that they can dislodge dirt or other contaminants off the surface of the object exposed. This is the kind of phenomenon which both the megasonic and ultrasonic cleaning system approach utilizes.

The megasonic and ultrasonic cleaning approach is revolutionary. This cleaning approach is faster, more thorough and more efficient. Since megasonic and ultrasonic cleaning systems are contactless cleaning systems, they do not require the use of harsh cleaning chemicals or mechanical scrubbing as conventional cleaning methods do.

The ultrasonic and
megasonic cleaning system approach are also environmentally friendly, since neither use cleaning chemicals. In conventional cleaning methods, they require the application of an involved chemical disposal system to meet compliance with environmental laws.

Kaijo has been a global leader in the development and use of megasonic and ultrasonic technology for industrial applications for over 60 years. To learn more about their megasonic and ultrasonic cleaning systems, please read the complete article titled “What Is the Definition of Ultrasonic and Megasonic Frequency”. If you have questions, or would like a free consultation, contact Kaijo by phone at 208-675-5575 or by sending an email to info@kaijo-shibuya.com