Drying of parts

Neutralization

After processing in concentrated acid solutions, the parts are subjected to neutralization, since rinsing in water in this case is not enough. In this regard, steel parts (made of carbon and corrosion-resistant steel) are treated in a 2 … 7% solution of sodium carbonate at a temperature of 15 … 30 ° C in order to neutralize the acid remaining on the surface, in microdepressions and pores. Parts are subjected to such processing after electrochemical polishing, etching, chemical and electrochemical activation, passivation.

Drying of parts after electroplating

S / shka. After applying galvanic coatings and corresponding rinses, ending with rinsing in hot water, the parts are dried to completely remove moisture from the surface and pores in the coating.

For thick-walled massive parts of a simple configuration, drying is carried out in air at a temperature of 15 … 30 ° C. Thick-walled parts of a complex configuration are dried by blowing with compressed air at 15 … 60 ° C.

Parts processed on hangers are dried in a drying cabinet or drying chamber with air circulation heated to 105 … 115 ° C. Drying time is 3 … 10 minutes. Parts of a complex configuration are preliminarily blown with compressed air.

Small parts processed in bulk are dried in a centrifuge at a temperature of about 70 ° C or special moving sieves, screw devices, conveyors with air circulation heated to 105 … 115 ° C. You can dry parts in a rotating drum with continuous circulation of hot air.

When drying chromated zinc or cadmium coatings and oxide-phosphate coatings over aluminum, the air temperature should not exceed 50 ° C.

With special requirements for parts, drying is carried out by sequential immersion in two containers with ethyl alcohol.

Industrial washing machines: purpose and types

The machine industry currently needs to keep parts clean at all stages of production. We are talking about cleaning them from chips and dirt, corrosion and cooling products. Special attention should be paid to products after warehouse storage before assembling precision instruments and mechanisms used in the automotive and aviation industries.

Within the framework of enterprises, an industrial metal wash is used for this operation. With the help of such equipment, labor productivity and business efficiency are significantly increased. The products are offered by the Motor Technologies company.

Industrial type washes differ significantly from their counterparts, which are used in the flow repair of vehicles. The priority is to automate and reduce the human factor during operations. Most of the installations are multi-stage, working in several cycles – degreasing and rinsing, passivation, phosphating and drying.

The most widespread machines are front-loading machines. They are used to clean large and weighty parts. Allows you to cope with the most bulky and heavy machines thanks to the increased volume of the chamber. The operator only needs to load the parts to be cleaned onto the platform, then place them in the washing chamber and decide on the cleaning program.

Types of washing machines

Depending on the specifics of production activities, equipment for washing parts is divided into the following types:

Submersible or universal machines. Such equipment is used for processing small parts. With their help, rather large batches of products are washed out. In addition to immersion in the solution, jet and ultrasonic washing, rinsing and drying are provided. Several models of such installations are produced. They differ in carrying capacity and volume;

Industrial. They are used to carry out interoperational processing of parts, including large units;

Checkpoints. Productive machines used for mass and serial production. Usually built into existing production lines;

Manual. Often used in small car services and technical stations.
These are not all types of washing machines that our company produces.

Features of cleaning nozzles with ultrasound

The reason for clogged injectors is often low-quality fuel. When it burns, carbon deposits are formed in the form of resinous compounds. Externally similar to a varnish crust, it is not scraped off or washed off with solvents.

Engine operation directly depends on the thickness of the carbon layer: the thicker it is, the greater the fuel consumption.

When to ultrasonic clean nozzles

If your car uses more fuel than usual, idles unstable and there is a loss of power, contact a workshop immediately.

Additional evidence of clogging is manifested in the following symptoms:

  • increased CO / CH level;
  • unstable functioning of the car engine;
  • corrosive exhaust gases and detonation;
  • failure of various systems and components.

About two ways of cleaning
The first way is with the help of chemicals. The car owner himself can monitor the degree of contamination of parts by regularly performing preventive maintenance. However, with a thick layer of carbon deposits, chemistry may not completely remove it.

Ultrasonic cleaning of injectors is recognized as more effective and of higher quality. This method removes even complex dirt.

Motorists sometimes complain that after using ultrasound, the injectors stop working. Car service specialists disagree with this, who claim that this method reveals non-working parts of the part. When a thick layer of carbon is formed, the nozzle deforms and breaks. It is because of this that, after cleaning, the engine will not start.

How is ultrasonic cleaning of nozzles carried out?

With this method of cleaning, the part is lowered into a bath filled with a special solution. At the service station, special containers are used for cleaning – ultrasonic baths. The nozzles together with the nozzle are lowered into the bath, then ultrasonic waves are turned on. The oscillation frequency of these waves contributes to the effective cleaning of the internal cavities of the parts.

The main thing is not to completely dip the part into the liquid. Then a short circuit may occur, it will become unusable, and you will be forced to contact the spare parts stores for a new part.

The cleaned parts are tested on the bench, where the degree of wear, tightness, performance is determined.

However, the procedure has a certain disadvantage – only the injectors are cleaned, and other parts of the fuel system remain uncleaned. This effect is called half-hearted.

Clients often ask which cleaning method to choose. With the help of ultrasound, resuscitation actions of the nozzles are carried out – checking for accuracy, restoring performance. Washing engine parts partially removes carbon deposits and is a maintenance not only of the injectors, but also of the cylinder-piston system and the fuel rail.

Therefore, ultrasound is carried out in case of suspicion of a malfunction of the nozzles, or with a mileage of 70 thousand km or more. It is advisable to flush the engine every 20-25 thousand km, combining it with replacing the spark plugs.