In modern industrial painting processes, the use of spraying equipment is becoming more and more widespread, and the quality of the spraying effect directly affects the appearance quality and coating performance of the product. Among them, the reasonable adjustment of atomization pressure is one of the key links to ensure the quality of spraying. This article will introduce in detail how to correctly adjust the atomization pressure of spraying equipment from three aspects: the basic concept of atomization pressure, adjustment methods, and precautions.



1. Basic concept of atomizing pressure



The so-called atomizing pressure refers to the compressed air pressure required for the spray gun to break the paint into tiny particles (i.e., atomization) during operation. The quality of atomization directly affects the uniformity, adhesion, and surface smoothness of the coating. Generally, the higher the atomizing pressure, the finer the paint particles, and the better the spraying effect; however, excessive pressure can also lead to increased paint scatter, severe waste, and even affect the safety of the operator and the environment.



2. Methods of adjusting the atomizing pressure



1. Adjust according to the type of paint



Different types of coatings (such as water-based paint, oil-based paint, powder coatings, etc.) have different viscosities and rheological properties, and the required atomizing pressure during spraying is also different. Generally, coatings with higher viscosity require higher atomizing pressure to ensure good atomizing effect; while low-viscosity coatings can be appropriately reduced to avoid excessive atomization.



2. Refer to the equipment manual



Each spraying equipment is equipped with a corresponding operation manual upon leaving the factory, which will list in detail the recommended atomizing pressure range under different spraying conditions. Users should make an initial setting according to the suggestions in the manual and then make fine adjustments based on the actual spraying effect.



3. Adjust in combination with the spraying distance and gun angle



The farther the spraying distance, the longer the time the paint particles fly in the air, which is prone to drying and agglomeration, so it may be necessary to appropriately increase the atomizing pressure; the angle between the gun and the surface of the workpiece also affects the adhesion effect of the paint, and it is usually recommended to keep it within ±15° of the vertical direction.

　　4. Conduct trial spraying and observation

　　Before formal spraying, a trial spray should be carried out on waste boards or sample boards. By observing the atomizing state of the coating, the uniformity of coverage, and whether there are phenomena such as sagging, the current atomizing pressure can be judged as appropriate, and the corresponding adjustment can be made.



3. Matters to be aware of when adjusting the atomizing pressure



- Avoid excessive pressure: Excessive atomizing pressure not only causes paint waste and environmental pollution but may also affect the adhesion and luster of the coating.



- Keep the gas source clean and dry: Moisture and impurities in the air can affect the atomizing effect and even clog the nozzle, so it is recommended to install a drying filter device in the gas source system.



- Regular maintenance and inspection of equipment: Nozzles, gas valves, and other key components are prone to wear or clog, and should be regularly checked and cleaned or replaced to ensure stable atomizing pressure.



- Pay attention to safe operation: High-pressure gas sources have certain dangers, and operators should wear protective equipment and ensure that the equipment is well grounded to prevent static electricity from causing accidents.



Conclusion



In summary, the adjustment of the atomizing pressure of the spraying equipment is a technically demanding task that requires comprehensive judgment and adjustment based on the characteristics of the paint, the model of the equipment, and the process requirements. Only by scientifically and reasonably controlling the atomizing pressure can the spraying efficiency and coating quality be effectively improved, creating greater value for the enterprise. In actual operation, it is recommended that professionals guide and continuously accumulate experience to achieve the best spraying effect.