Working Principle

An automatic spray gun atomizes paint into fine particles using compressed air, which are then sprayed onto the target surface through the nozzle. The working mechanisms are generally categorized into the following types:

Siphon-Feed Spray Gun: Utilizes high-velocity airflow to create localized vacuum pressure in the spray gun, drawing paint from the cup to the nozzle, where it is atomized and sprayed. This type is ideal for applications requiring specific film thickness.

Gravity-Feed Spray Gun: Relies on gravity to direct paint from the cup to the nozzle, where it is atomized by air. This type is suitable for small-volume, frequent operations.

Pressure-Feed Spray Gun: Paint is supplied to multiple spray guns from a pressurized paint tank, making it ideal for high-volume, continuous coating processes.

Component Structure

An automatic spray gun typically consists of the following key parts:

Air Cap: Controls the shape and pattern of the spray.

Nozzle: Atomizes the paint into fine particles.

Needle Valve: Regulates the flow rate of the paint.

Gun Body: The main structure that supports and connects all components.

Air Supply System: Such as a pressure tank, pot, or pump, which provides compressed air for atomizing the paint.

Application Scenarios and Advantages

Automatic spray guns are widely used in industrial production and offer significant advantages over traditional manual painting:

High Efficiency: Up to 5–10 times faster than manual brushing, allowing for rapid completion of large-area coatings.

Superior Finish Quality: Produces fine, smooth, and uniform coatings with excellent visual appeal.

Broad Applicability: Suitable for surface finishing of a wide range of industrial products, including automobiles, furniture, electronics, and more.