Ultrasonic cleaning for industrial use mainly performs several functions:
Parts must be cleaned before sealing, electroplating, and painting. The key to ultrasonic de-oiling is to select a cleaning solution containing a specific Surfactant and emulsifier. The practice has proved that soaking before ultrasonic cleaning (to soften the oil) is a very effective means.
Rust removal and scale removal
After rolling or heat treatment, a layer of 5-10 & mu; M iron oxide is formed on the surface of steel parts.
1. Carbon deposits
Coke is a hard carbide formed by the combustion of fuel oil and engine oil under high temperatures and anoxic conditions. It adsorbs on the metal surface and has a strong intermolecular bond. In the past, CNR Dalian used to clean carbon deposits on parts such as cylinder heads and pistons of diesel engines using petrol bubbles, small saw blades, and so on, not only could not be cleaned but also the smoothness of the piston surface was damaged, each shift can only clean half of the diesel engine, using ultrasonic cleaning after only 2 hours can be washed one, improve efficiency 8 times.
2. Greasy and Greasy
The workpieces are contaminated by oil, and then fall into the dust, forming oily sludge is a mixture of oil, tar, oxygen-containing acid, carbides, ash, and water, with ultrasonic cleaning, can be easily cleaned clean.
3. Flux and polishing paste
Ultrasonic cleaning is widely used in the electronic industry to remove rosin and micron particles on the silicon surface in surface flux A large number of fine electrical components, and vacuum devices have also been widely used since the 1950s for degreasing, rust, and blackening (oxidation) before cleaning.
What are the cleaning methods of industrial cleaning?
Immersion cleaning method
Add acid or alkaline cleaning solution in the tank, which will be cleaned by the object into the immersion, so that the surface and the cavity of the attachment by the way of immersion soften or naturally fall off. This way physical wetting, purely by cleaning liquid chemical reaction to achieve the cleaning goal, needs a long time and cleaning ability is weak.
Jet cleaning method
Install a multi-way jet nozzle in the cleaning tank, the direction of the jet is aimed at cleaning objects, open the air pump to blow away the dust or dirt on the surface of objects, some factories mostly use an industrial air gun, the way that worker holds to blow, this way removes the dirt such as dust to have no adhesion sex, have no effect to grease, waxy, gummy dirt.
Spray cleaning method
As with the air-jet method, multiple nozzles are installed so that the cleaning fluid is sprayed on the surface of the cleaning object, depending on the impact force of the water flow, and the water or mixed cleaning fluid is used to clean the object, especially at high pressure, the washing capacity has been significantly enhanced.
Mechanical brushing method
Install a brush, roller, wiredrawing cloth, and so on in the cleaning trough with the jig, put the object that needs to be cleaned in the trough, use mechanical movement, Tool Brush, cloth, and so on to achieve cleaning by friction with the workpiece, this soaking at the same time auxiliary mechanical force, is a more primitive cleaning method, has a direct effect, but is not suitable for more precision or cleaning high-quality workpiece, especially for precision damage.
Ultrasonic cleaning method
When an Ultrasonic transducer is installed in the cleaning tank, the Ultrasonic transducer sends out shock waves that propagate through the liquid, splitting the liquid molecules into cavitation bubbles. The cavitation bubbles quickly break up as the pressure around them increases, the instant crushing produces huge energy, which can peel off the adhesions, debris, grease, and so on to achieve the goal of cleaning. This method is an efficient and non-destructive cleaning method.
Vacuum cleaning method
Using a vacuum pump to create a vacuum, free gas and dissolved gas in the water will be released, through the exhaust valve discharge, degassing is unsaturated water, with a certain degree of absorption, to clean, of course, the method combined with ultrasound better.
Dry ice cleaning method
Dry ice has unique thermodynamic properties and is extremely cold (-78 â ° C). When dry ice particles are Compressed air onto the surface of the cleaned object, they sublimate rapidly and expand in volume by nearly 800 times in a few thousandths of a second, at the same time, it produces heat exchange with the surface of the parts to be washed, so it can clean the surface of the parts.
Drum cleaning method
A roller or wave wheel device is installed in the tank, which generates high-speed centrifugal force when rotating, causing the soft object to be thrown towards the wall of the tank, and then to flow back down after rising, forming a central vortex, which on the one hand drives the water movement and on the other hand is similar to beating and stirring, in addition to the role of detergent to achieve a clean effect.
Saturated steam method
The high temperature of saturated steam is used to soften the dirt, clean the oily dirt on the surface of the parts, and vaporize it. The cleaning effect is better, but because of the evaporation of some residues can not fall, but also need to assist other methods to remove them.