Electrostatic spraying equipment

Electrostatic spraying equipment manufacturer

Manufacturer of electrostatic plastic spraying equipment:

1, linqu huixin electronic machinery equipment co., ltd.

The company is located in the scenic Linqu County, and is an enterprise integrating scientific research and development, design, production, installation and debugging services.

2. Shijiazhuang Zhanyao Spraying Equipment Technology Co., Ltd..

Shijiazhuang Zhanyao Spraying Equipment Technology Co., Ltd. covers an area of 10000 square meters. The enterprise has passed the ISO900 1 quality management system certification, ISO 1400 1 environmental management system certification and ISO4500 1 occupational health and safety management system certification. It is an enterprise integrating R&D, manufacturing and sales of automatic spraying equipment and spraying assembly line.

3. Guangxi Xinhonglei Electromechanical Equipment Co., Ltd..

The company specializes in producing metal rust remover, degreasing powder, cleaning agent, phosphating solution, passivation solution, electrostatic plastic spraying machine, powder spraying recycling room, automatic painting assembly line, automatic painting assembly line, drying assembly line, fuel oil, gas, firewood, coal, electricity, gas and other products.

4. Henan Tianzhizhu Painting Machinery Equipment Co., Ltd..

The company is an enterprise engaged in research, development, design, production and sales of painting equipment and energy-saving and environmental-friendly thermal energy products. In the continuous development, the company will make greater efforts to integrate domestic and foreign resources, continuously cultivate artificial talents, study new technology products and continuously improve product quality.

5. Weifang Tegu Machinery Co., Ltd..

The company specializes in research and development, service and marketing of painting equipment and electrophoresis equipment. The company has a group of technicians and skilled employees with many years of design experience, excellent production equipment and high-precision testing instruments, and has established a complete quality assurance and modern enterprise management system.

What is electrostatic spraying? What is the working principle of electrostatic spraying equipment?

Electrostatic spraying refers to a coating method that uses corona discharge principle to make atomized coating negatively charged under the action of high voltage DC electric field and adsorb it on the surface of positively charged substrate to discharge. Electrostatic spraying equipment consists of spray gun, spray cup and electrostatic spraying high voltage power supply.

Working principle of electrostatic spraying equipment: negative high voltage is electrostatically connected to the gun head of electrostatic spray gun. When the voltage is high enough, the air near the gun head produces a strong corona discharge, forming a gas ion zone. When electrostatic spray gun atomized paint particles are in this area, the atomized paint particles are negatively charged. The coated workpiece is hung on the grounded conveying line, and the surface of the workpiece is positively charged. According to the electrostatic principle that opposite charges attract each other, negatively charged paint mist particles move to the opposite working surface, and are adsorbed and deposited on the surface of the workpiece to form a uniform and dense paint film, and the workpiece is coated.

Difference between Friction Electrostatic Spraying Equipment and High Voltage Electrostatic Spraying Equipment

The following is answered by the engineer of Qiangqiang Machinery Automatic Spraying Equipment Factory:

1, friction electrostatic spraying equipment

Friction electrostatic spraying does not need high-voltage electrostatic generator used in high-voltage electrostatic spraying, and it is not necessary to establish high-voltage electrostatic factory between powder spray gun and workpiece. The key point is that its powder spray gun is made of strongly electronegative materials. When two materials with different electronegativity rub, the material with weak electronegativity will be positively charged, and the material with strong electronegativity will be negatively charged. When powder coating with weak negative film formation is used, the collision between powder coating particles and the friction between powder and gun body made of strong negative material will make powder particles positively charged. Therefore, when the spray gun is made of suitable materials, the powder will generate friction and be positively charged when it moves in the gun body under the push of compressed air. Under the constant push of airflow, it will fly to the grounded workpiece and be adsorbed on it. After curing, this loose coating will form a uniform, continuous and smooth coating.

2. High-voltage powder electrostatic spraying equipment

When spraying powder with high-voltage static electricity, like solvent coating, high-voltage static electricity should be applied between the electrostatic spray gun and the workpiece, and the spray gun is connected to the negative electrode of electrostatic field and the workpiece is grounded. The difference is that the powder coating enters the powder electrostatic spray gun from the powder supplier through the powder conveying pipe under the action of purifying compressed air. The spray gun head is equipped with a sharp metal ring or pole needle as an electrode. When the electrode is connected with high-voltage static electricity, corona discharge will occur, and dense negative charge will be generated near the electrode. When the powder coating is ejected from the head of the electrostatic powder gun, it will capture the charge and be negatively charged, and under the action of airflow and electric field, it will fly to the workpiece and be adsorbed on its surface.

The above information was collected from the manufacturer of Qiangqiang mechanical automatic spraying equipment. For more information about related technologies, please contact official website Consulting Engineer of Qiangqiang Machinery.

What is the price of a set of electrostatic spraying equipment?

The price of electrostatic spraying equipment is generally between tens of thousands and hundreds of thousands of yuan. Spraying equipment is non-standard equipment, and the product is not very clear. The specific situation should be determined according to the construction scheme of the equipment. It is usually necessary to adapt the spraying equipment to non-standard equipment. Please contact the manufacturer for the specific price.

What is electrostatic spraying?

Atomized paint particles are negatively charged in DC high-voltage electric field, and under the action of electric field force, paint particles fly to the surface of positively charged workpiece to form paint film. This process is called electrostatic spraying.

Principle:

Electrostatic coating uses the coated object as the positive electrode and is grounded under daily conditions; The paint atomizing device is the negative electrode, which is connected to the negative high voltage of the power supply, thus generating a high-voltage electrostatic field at the two poles. Due to the corona discharge of the cathode, the sprayed coating medium can be charged and further atomized. According to the principle of "like charges repel, opposite charges attract", under the action of electric field force, the charged coating medium forms a surrounding effect on the coated object, and flows to the surface of the positively charged coated object along the power line directionally, accumulating a uniform and firm adhesive film. Electrostatic coating technology can also use positive corona discharge, but the critical voltage of negative corona discharge is lower than that of positive corona discharge, and it is stable and difficult to breed sparks. Under normal circumstances, the coated object is grounded as a positive electrode.

Electrostatic spraying equipment

Composition and structure of powder electrostatic spraying equipment

Powder electrostatic spraying equipment mainly includes: powder spraying room, high-voltage electrostatic generator, electrostatic spray gun, powder supplier, powder recovery device, workpiece rotating mechanism, etc. 1, classification: spray guns can be divided into portable powder spray guns, fixed automatic powder spray guns and disc spray guns. According to their use; According to the charged form, it is divided into internal charged gun and external charged gun; According to the form of diffusion mechanism, it can be divided into conflict gun, rebound gun, secondary air gun and centrifugal rotor gun.

2. Spraying efficiency: The charging mechanism of powder gun is the key factor to improve spraying efficiency. Generally speaking, the core of powder spraying equipment is spray gun and charging system. As far as the market is concerned, corona spray guns account for a large proportion, because the biggest advantage of charging powder by high-voltage corona discharge is that it can spray all kinds of thermosetting powder coatings at present and get very good results. Its advantages mainly lie in excellent stability, powder feeding rate and powder feeding speed.

3. The development process of spray gun is: voltage control, current control and total energy control. The total energy control is that the voltage and current of the spray gun are constantly adjusted to the ideal state with the distance from the workpiece parts to achieve the best coating effect. 1) The powder supply system continuously and evenly transports the coated powder from the powder container to the powder spraying gun for spraying.

The powder supply system consists of an air compressor, an oil-water separator, an air dryer, a regulating valve, a compressed air pipeline, an electromagnetic control valve, a powder supplier and a powder conveying pipeline.

2) Form of powder feeder

In the electrostatic powder spraying system, there are many kinds of powder suppliers, which can usually be divided into: pressure vessel type, screw or turntable mechanical conveying type, Venturi air suction type.

3) Powder recovery device

The recovery of powder can be divided into wet method and dry method.

Wet method is to filter the airflow with powder through a liquid container to achieve purification, and the powder with liquid is dried and reused.

Dry powder recovery is to collect powder particles in the powder airflow discharged from the powder spraying room. The types of dry powder recovery include gravity sedimentation, inertia separation, cyclone separation and sintering plate separation. In actual production, multi-stage recovery devices are often used to achieve better separation effect.