High-Pressure Structure and Operating Principle of Airless Sprayers
Release Date:
Jan 12,2021
With advances in science and technology, the coatings industry is evolving toward mechanization, automation, and continuous production. Traditional manual brushing and roller application can no longer meet the demands of modern industry. High-pressure airless sprayers, which offer high efficiency, minimal paint mist during operation, and superior coating quality, have been widely adopted across numerous sectors.
With advances in science and technology, the coatings industry is evolving toward mechanization, automation, and continuous production. Traditional manual brushing and roller application can no longer meet the demands of modern industry. High-pressure… Airless sprayer With advantages such as high efficiency, minimal paint mist during operation, and superior coating quality, it has been widely adopted across numerous industries.
An electrostatic high-pressure airless sprayer delivers coating material through the nozzle under a specified pressure. As the material is sprayed, it becomes atomized, and the resulting paint mist acquires a negative charge. Simultaneously, a high-voltage electric field is established between the nozzle and the substrate. Under the influence of electrostatic forces, the charged paint mist is attracted and deposited onto the surface of the object being coated, forming a uniform coating. This technology integrates the advantages of both electrostatic spraying and high-pressure airless spraying, further enhancing coating quality and efficiency while reducing material waste. Reduced waste of spray materials.
High-pressure airless spraying boasts a wide range of applications. It is not only suitable for large‑area construction and painting; it is renowned for its rapid application speed, high efficiency, and excellent coating quality. It can also be used to coat narrow components that are difficult to paint with conventional brushing methods, making it ideal for various automated coating lines. The advent of airless spray‑gun technology has addressed certain limitations in airless spraying and further expanded the scope of coating applications. It has been spray-coated and the scope of spraying has been expanded. It has entered new fields.
The working principle of high-pressure airless spraying involves two key aspects: pressurization and the absence of air. Pressurization means that, as the coating reaches the nozzle, it is continuously subjected to high pressure—typically 10 to 30 MPa—by a high-pressure pump, and then ejected from the nozzle. In contrast, airless spraying refers to a process where, upon exiting the nozzle, the paint typically attains a velocity of up to 1 m/s. The paint collides forcefully with airborne particles, causing it to break into fine droplets; this continues until its velocity drops to zero during flight, at which point it adheres to the surface of the object being coated. This process is known as atomization. Because no air is mixed into the spray stream, it is termed “airless.” Airless sprayer 。
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