Knowledge | 2022-04-18
How to purchase an ultrasonic cleaning machine?
You need to know which way is suitable to clean your parts when you purchase an ultrasonic cleaning machine. Second, what cleaning result do you want to reach. Third, evaluate the production capacity of your company and the max capacity of the machine. Fourth, learn about the cleaning process and ask your friends in your industry. Or contact the manufacturer of the ultrasonic cleaning machine if there is a new cleaning process for your parts. Fifth, choose about 3 professional factories to compare the cleaning process, price, and after-sales service. Sixth put material, model, price， and service term in the contract. So the supplier won't cheat you on that. Seventh, acceptance. If you are buying a large piece of equipment, then better to check the equipment at the factory. Eighth, the training for your workers. If your equipment needs a factory to train your workers, please make sure your workers learn and know how to use the machine.
Here are some factors you should consider when you buy ultrasonic cleaning equipment.
1. Ultrasonic Power
Ultrasonic cleaning sometimes uses small power, and it takes a long time without removing dirt. If the power reaches a certain value, the dirt is quickly removed. If the selected power is too large, the cavitation intensity will increase, and the cleaning effect is improved. But at this time, more precise parts also produce etching points. Moreover, the vapor plate in the bottom of the cleaning machine is severe. And the corrosion of the water is also increased. There is no problem when organic solvents such as trichloroethylene are used. However, when water or water-soluble cleaning liquid is used, it is easy to be corroded by water. If the surface of the vibrating plate has been scary. Strong power is more cavitation corrosion in water. Therefore, the ultrasonic power is selected according to the actual usage.
Ultrasound cleaning frequencies from 28 kHz to 120kHz. Physical cleaning force caused by holes when using water or water cleaner, obviously beneficial to low frequencies, generally from 28-40 kHz. Clean the parts of the small gap, slit, deep hole, preferably with high frequency (generally 40 kHz or more), or even hundreds of kHz. When cleaning the clock parts, use 100 kHz. If you use broadband FM, the effect is better.
3. Cleaning Basket
When cleaning small parts items, it is often used in the basket. Because the mesh is to cause ultrasound attenuation, it should be particularly attained. It is good to use 10 mm or more mesh when the frequency is 28kHz.
The most suitable cleaning temperature of the water cleaning liquid is 40-60 ° C. Especially if the cleaning fluid is low, the cavitation effect is poor, and the cleaning effect is also poor. Therefore, some cleaning machines are temperature control over the heating electric wire on the outside of the cleaning cylinder. When the temperature is raised, the void is easy to send. Therefore, the cleaning effect is better. When the temperature continues to increase, the gas pressure in the aerosol is increased. The effect of impact sound pressure is reduced, and the effect will be weakened. The organic solvent cleaning liquid is close to the temperature of the boiling point to clean.
5. The amount of the cleaning liquid and the position of the part
Generally, the cleaning liquid level is 100mm higher than that of the surface of the vibrating sub-surface is better. Due to the influence of the single-frequency cleaning machine, the wavefront is small, and the amplitude is largely cleaned. Therefore, the best choice of cleaning items should be placed at the wave. (More effective range 3-18 cm)
6. Selection of ultrasonic cleaning process and cleaning liquid
Before purchasing the cleaning system, the following application is applied as follows. You should make clear the materials, structure, and quantity of the finishing parts. Analysis and clear dirt to be removed. These will decide what kind of cleaning process and cleaning liquid you should use. Judging the prerequisite for use of aqueous cleaning fluid or solvent. The final cleaning process also needs to be cleaned experiments to verify. Only in this way can it provide a suitable cleaning system. Design a reasonable cleaning process and cleaning fluid. Taking into account the influence of the physics characteristics of the cleaning liquid on ultrasound cleaning, the steam pressure, surface tension, viscosity, and density should be the most significant influencing factor. Temperature can affect these factors. So it will also affect the efficiency of the cavitation. Any cleaning system must use the cleaning solution.
7. Three factors when you choose a cleaning agent.
(1). Cleaning efficiency: When selecting the most effective cleaning solvent, you must do experiments. If ultrasound is introduced in the existing cleaning process, the solvent used is generally not changed;
(2), Easy to operate: The liquid used should be safe and non-toxic, simple to operate and long service life;
(3), Cost: The cost of use of the cheapest cleaning solvent is not necessarily the lowest. In use, you must take into account the cleaning efficiency, safety, and a certain amount of solvent to be cleaned, etc. Of course, the selected cleaning solvent must achieve the cleaning effect. It should be compatible with the cleaned workpiece material. Water is the most common cleaning solution. Therefore, the use of water-based solutions is easy to operate, low cost, and has wide applications. However, there are many solvents available for certain materials and dirt, etc. Different cleaning fluids are distinguished by the cleaning system aqueous system. It is usually composed of an open slot, and the workpiece is immersed therefrom. The complex system consists of multiple slots and is equipped with a circulating filtering system, a flip slot, a dry tank, and other annexes.
8. Solvent system
Most of the ultrasonic vapor phase eliminates the oil cleaning machine, often equipped with a continuous recovery device. Ultrasonic vapor phase cleaning of the oil fat process is done by the integrated multi-slot system formed by the solvent evaporation tank and the ultrasonic dip. Under the heat solvent vapor and ultrasonic stirring use, oil, lipid, wax, and other dirt in the solvent can be removed. After a column of cleaning, the workpiece is heated, clean, and dry.
9. Cleaning parts
Another consideration of ultrasound cleaning is the design of the cleaning parts, following, or the tooling of the cleaning parts. When the cleaning parts are in the ultrasound cleaning tank, they should not touch the bottom regardless of the cleaning parts or the cleaning basket. The total cross-sectional area of the cleaning piece should not exceed 70% of the cross-sectional area of the ultrasound. Rubber and non-rigidized plastics absorb ultrasonic energy. Therefore, this type of material should be cautious when used for tooling. Insulated cleaning parts should also cause special attention. An improper tooling basket is designed, or it is too heavy, even if the best ultrasound cleaning system is greatly reduced. Hooks, shelves, and beakers can be used to support cleaning parts.
10. Cleaning time
1-10 minutes, it is best to clean with timing mode.