November 20, 2017
408 Fuel injectors may suffer from deposits to such an extent that they have to be removed from the engine and cleaned manually. Traditional methods involve soaking in harsh solvents, forcing solvents through the injector at high pressure and removing deposits manually. These methods often don’t result in complete removal of the deposits and they may damage the injector. In addition, the solvents used are expensive and difficult to dispose of properly and in an environmentally friendly manner. The cleaning process itself is time-consuming and expensive. Ultrasonic cleaning systems offer an effective alternative that doesn’t suffer from the same drawbacks and that cleans quickly and completely.
How Ultrasonic Cleaning Works
With ultrasonic cleaning, fuel injectors are placed in a cleaning tank that has an ultrasonic transducer installed at the bottom or in the walls. Alternatively, a portable ultrasonic transducer may be placed in the cleaning solution. The injectors should be placed in a basket so that they don’t touch the tank walls or bottom to avoid damage from possible vibrations.
The ultrasonic transducer is powered from an ultrasonic generator that supplies the high frequency electrical signal. The normal signal for this type of ultrasonic cleaning is about 30 kHz, for example 26 kHz or 38 kHz. The transducer generates ultrasonic waves in the cleaning solution and the waves cause cavitation bubbles to form as the sound pressure rises and falls. It is these bubbles that clean hard metal surfaces such as those of fuel injectors.
Because the bubbles appear wherever the cleaning solution is present, ultrasonic cleaning works both outside and inside the fuel injectors, cleaning hard-to-reach places effectively and removing surface contamination everywhere. As a result, deposits and surface contamination are removed from inside fuel injector holes, from inside threads and from couplings. All foreign material is dislodged and cleaned down to the bare metal. At the same time, ultrasonic cleaning is fast, typically taking from ten to twenty minutes.
Ultrasonic Cleaning Hints
Ultrasonic cleaning systems are safe and easy to use and they clean without the use of aggressive chemicals. They work well with all kinds of parts to be cleaned but performance is improved when a few simple factors are taken into account. While they normally remove all dirt, they can work even faster for some cleaning applications.
Cleaning performance depends to some extent on the frequency used and the cleaning power of the generator. Lower frequencies deliver more powerful cleaning action but may damage fragile parts and some metal surfaces. In any case, the generator has to be powerful enough to fill the cleaning tank with ultrasonic waves. Too little power results in dead areas where the cleaning bubbles are fewer.
Another way of speeding up the cleaning process is to add a mild solvent to the cleaning solution. Although ultrasonic cleaning works well with plain water, dissolving or softening the deposit will help the bubbles clean. If the nature of the contaminant is known, specific solvents or detergents that attack the material to be removed can be added to the cleaning solution. Unlike cleaning with traditional methods, no soaking is required, and the mild solvent or detergent works together with the cavitation bubbles to speed up the cleaning action.
Kaijo’s 60 years of experience with ultrasonic cleaners allow the company to propose the best solutions for their customers’ cleaning requirements. Kaijo can advise companies that have to clean automotive parts such as fuel injectors regarding the best ultrasonic frequencies to use and the power needed for the ultrasonic generator. The company can follow up with proposals from its complete line of ultrasonic cleaning equipment and can make suggestions based in its experience in supplying such equipment to various companies working with new and restored automotive parts.Read More
November 8, 2017
From delicate medical equipment to machine parts, there is very little in the world of industrial cleaning where ultrasonic cleaners do not excel, often leaving conventional cleaning methods behind. Making use of sonic waves at frequencies as high as 400 kHz to create and implode millions of bubbles on surfaces that need work, ultrasonic cleaning forms microscopic areas of high cavitation pressure, and momentary bursts of heat at temperatures as high as 5,000° C. These actions create cleaning forces that are both powerful and gentle at the same time. From lime scale and rust to fungus and dried bodily fluids, ultrasonic cleaning is far and away the most efficient and cost-effective way to clean practically any surface.
If you’re a business owner considering a cleaning solution, however, you’re possibly very interested in the latter part of this argument: the one to do with cost-effectiveness. Can a tool as efficient and as high-tech really be cost-effective? How exactly does the cost-effectiveness come about?
You save on materials
Depending on the cleaning task on hand, regular high-pressure spray washers require a great deal of chemical help to get much done. The pressure of the water or other liquid is usually insufficient when it comes to loosening hard stains. Not only are the chemical agents expensive, however, workers often need protective equipment, and articles cleaned can sustain some damage.
These concerns do not exist with ultrasonic cleaners. Cleaning with high-frequency pressure waves does not require chemical action to loosen dirt up. Certainly, a mild detergent solution may be used when you use ultrasonic cleaners — it helps move loosened dirt away from the surface; it tends to be inexpensive, however.
Best of all, with the need for powerful chemicals absent, there’s far less expense made complying with environmental regulations to do with safe disposal.
You save on labor costs
One of the greatest benefits to choosing ultrasonic cleaners over pressure washers appears the form of savings in time and effort expended. The ultrasonic waves generated by these cleaners do not need to be directly aimed at surfaces to be cleaned, no matter how hidden they may be. They get into every part of the work that you need cleaned, no matter how small, inconveniently shaped, or hidden. This means that workers spend less time getting into nooks and crannies. Work becomes cleaner with little effort. With faster cleaning made possible, you get greater productivity out of your labor force.
You save on maintenance
Conventional spray washers can need plenty of energy to operate, and careful, and expensive maintenance. They come with high-pressure pumps, hoses and nozzles. Moving parts don’t last forever. Motors, washers, joints and other parts frequently wear out. If there are toxic chemicals used, you need to take preventive maintenance to make sure that these chemicals cannot get to places where they can cause harm in the event of a leak. Ultrasonic cleaning, on the other hand, simply works. These models come with no moving parts — all you have is an ultrasonic transducer, and a bath of liquid. These models keep working forever.
Work with the best in the business
If the information here has your interest, you should think of Kaijo, one of the top manufacturers of industrial ultrasonic cleaners in the world. Kaijo offers industrial customers everything from customized ultrasonic cleaners to standalone equipment and turnkey installations. With experience catering to the cleaning needs of every kind of industry out there from automobiles to jewelry and from medical institutions to catering, Kaijo is the leader in ultrasonic technology worldwide.Read More