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The configuration of the electrophoresis equipment assembly line and the advantages of the electrophoresis line

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Release time:

2021-06-17 19:40

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Pre-treatment cleaning equipment

Mainly used to remove oil, rust, etc. on the surface of the workpiece. The main processes include washing, degreasing, washing, pickling, washing, neutralization, washing, surface adjustment, phosphating, washing, etc., which can be adjusted appropriately according to the situation of the workpiece. The pretreatment is divided into immersion pretreatment and spray pretreatment.

Electrophoresis ultrasonic cleaning machine

In the pretreatment process of electrophoresis, the process of ultrasonic degreasing is often used. So, what is the working principle of ultrasonic degreasing? What kind of substrate is suitable for the workpiece? Here, a simple analysis.

1. The degreasing process in which the parts with oil stains are placed in the degreasing fluid and the degreasing process is under the action of an ultrasonic field with a certain frequency is called ultrasonic degreasing.

2. Ultrasonic waves are generated by an ultrasonic generator, and the frequency is generally about 30kHz. Small workpieces use higher frequencies, and large workpieces use lower frequencies.

3. The basic principle of ultrasonic degreasing is cavitation. When ultrasonic waves act on the liquid, instant negative pressure and instant positive pressure are alternately generated repeatedly. During the half-period of negative pressure generated by vibration, vacuum cavities are generated in the liquid, and liquid vapor or gas dissolved in the solution enters the cavities to form bubbles. .

4. Then, in the half cycle of the positive pressure, the bubbles are compressed and ruptured, and a strong pressure is generated instantly, a huge shock wave is generated, a strong stirring effect on the solution, and an impact force that washes the oil stain on the surface of the workpiece is formed, and the surface of the part is deep. Grease in the recesses and voids is also easy to remove.

Electrophoresis ultrasonic cleaning machine

In the pretreatment process of electrophoresis, the process of ultrasonic degreasing is often used. So, what is the working principle of ultrasonic degreasing? What kind of substrate is more suitable for the workpiece? Here, a simple analysis.

1. The degreasing process in which the parts with oil stains are placed in the degreasing fluid and the degreasing process is under the action of an ultrasonic field with a certain frequency is called ultrasonic degreasing.

2. Ultrasonic waves are generated by an ultrasonic generator, and the frequency is generally about 30kHz. Small workpieces use higher frequencies, and large workpieces use lower frequencies.

3. The basic principle of ultrasonic degreasing is cavitation. When ultrasonic waves act on the liquid, instant negative pressure and instant positive pressure are alternately generated repeatedly. During the half-period of negative pressure generated by vibration, vacuum cavities are generated in the liquid, and liquid vapor or gas dissolved in the solution enters the cavities to form bubbles. .

4. Then, in the half cycle of the positive pressure, the bubbles are compressed and ruptured, and a strong pressure is generated instantly, a huge shock wave is generated, a strong stirring effect on the solution, and an impact force that washes the oil stain on the surface of the workpiece is formed, and the surface of the part is deep. Grease in the recesses and voids is also easy to remove.

Electrophoresis tank liquid circulation system

What is the significance of keeping the electrophoresis tank in circulation all the time?

If you carefully observe the electrophoresis equipment of a set of electrophoresis production line, you will find that in the electrophoresis production line, the electrophoresis bath should be kept circulating. If it is not circulated, the products produced by electrophoresis coating will definitely be different. Why is this? Hongheshun electrophoresis paint Equipment manufacturers will come to reveal the answer.

From a general perspective, the electrophoresis bath is kept in a circulating state to make the electrophoresis bath evenly dispersed and will not cause the electrophoretic coating particles to settle to the bottom of the bath.

Therefore, the electrophoresis tank should be continuously stirred after the tank is equipped. If there is a failure and the stirring needs to be stopped, the stopping time should not exceed 2h. .

The main functions of circulating and stirring electrophoresis bath solution are as follows:

1. Keep the tank liquid evenly mixed to prevent the pigment from precipitating in the tank or on the level of the coated object;

2. The tank liquid is recycled through filtering equipment, which can remove particles and other impurities in the tank liquid;

3. Timely eliminate the gas generated on the surface of the coated object during the electrophoresis process to prevent bubbles from being adsorbed on the workpiece.

What is the difference between cathodic electrophoretic paint and anodic electrophoretic paint?

Electrophoretic paint is also called electrodeposition paint. Under the action of a DC electric field, this kind of lacquer makes the polymer film-forming substance in the lacquer charged and moves to the oppositely charged electrode, thereby depositing on the metal surface. If the polymer film-forming material is negatively charged and deposited on the positively charged metal surface, the coating is called anodic electrophoretic paint. If the polymer film-forming material is positively charged and deposited on the surface of the negatively charged gold domain, then the coating is called cathodic electrophoretic paint.

There are two types of electrophoretic paint: varnish and color paint. But the vast majority of actual use is color paint. During electrophoresis, the pigment particles are wrapped by charged polymer film-forming particles and move to the oppositely charged metal surface. Therefore, whether the anode or cathodic electrophoretic paint is mainly determined by the properties of the polymer film-forming substance.

The anodic electrophoresis paint film-forming material is generally a polymer compound with carboxyl group, which is soluble in water after being neutralized by ammonia or amine compounds to form a salt. During electrophoresis, it ionizes into negatively charged polymer film-forming ions and positively charged The amine ion. The high molecular film-forming substance deposited on the metal surface has carboxyl groups, and a small part of the particles with carboxyl groups can also interact with the metal ions released from the anode to form metal soaps and deposit on the anode.

The cathodic electrophoresis paint film-forming material is generally a polymer compound with amine groups, which is soluble in water by carboxylic acid neutralization to form a salt, and ionizes into a positively charged polymer film-forming material ion and a loaded carboxylic acid during electrophoresis Ions, the polymer film-forming substance deposited on the surface of gold JS has amine groups, and the deposit does not contain gold urinary soap.

When manufacturing electrophoretic paint, first dissolve the polymer film-forming substance in the co-solvent, then mix and grind it together with the pigment, and sometimes add a small amount of non-ionized water to form a colored paint

Supply users. Users add ion-free water to dilute when using. The anodic electrophoretic paint has been neutralized by adding some amines before leaving the factory. When using it, add amine to adjust the pH value, and at the same time add water to dilute to a certain solid content before use. The cathodic electrophoretic paint film-forming material has amine groups and is not neutralized by acid when it leaves the factory. When used, the user can add acid to neutralize and adjust the pH value, and use it after diluting with water to a certain solid content.