There was a time when painting automobiles or other equipment was a tedious job as it required a lot of manpower and time. Moreover, these workers were exposed to the toxic fumes of paints, which ruined both their present and future health. Therefore, researchers and manufacturers came up with the idea of painting booths where all of these paint jobs were carried out safely, quickly, and much more effectively.
This modern paint equipment has gone through various improvements and variations to meet the multifaceted needs of the painting industry. Therefore, there exist many painting booths with different spraying techniques and each one of them has its advantages, disadvantages, and applications. We have discussed here four various types of spraying techniques that may exist in the modern painting booths.
- Air atomized spraying technique:
This is the most conventional spraying technique among the lot and it is also used extensively in the automotive painting industry. Painting booths with this spraying technique are fitted with traditional spray guns that use a mixture of compressed air and liquid paint to create a mist or an aerosol, which then gets coated on the object being painted.
Air atomized spraying technique is flexible enough to be used for various kinds of objects because it can be customized to meet the needs of various types of paint jobs. One of the major issues with this technique is that it results in a considerable loss of paint. However, this technique involves lesser labor costs which can offset the money wasted due to paint loss. Moreover, spray booths must be properly vented to save your employees from the toxic fumes that may still be present in the air.
- Airless Spraying Technique:
The airless spraying technique is an improvement to the air atomization spraying technique in terms of dealing with the paint loss problem. In this technique, the paint is not mixed with the pressurized air to ensure the potent flow of the liquid paint. Instead, paint is passed through a narrow opening to create pressure, but the paint particles are lower in velocity as compared to the air atomized paint particles.
This technique offers many advantages over some of the conventional techniques, but it also has its own set of challenges. For example, the operator needs to have advanced painting skills to carry out the job effectively, and the equipment will require more maintenance as compared to conventional painting techniques.
- Electrostatic Spraying Technique:
This technique is a modern innovation and produces the best transfer efficiency among all of the other spraying techniques. In the electrostatic spraying technique, paint particles are charged with the help of high voltage, and they are attracted to the surface of the object being painted. As a result, a solid and smooth coat is achieved without the loss of paint even on the objects that have sharp contours.
The application of this technique is limited in terms of scare paint options because it can only be used with paints that have a specific electrical conductivity. Moreover, this technique presents a considerable fire hazard as the paint particles are electrically charged.
- HVLP Spraying Technique:
High-Volume, Low-Pressure (HVLP) spraying technique is pretty much like air atomization spraying technique but it ensures lesser overspray and blowback. In this technique, liquid paint is mixed with high volumes of low-pressure air which results in a low-velocity mixture and reduces the amount of paint loss. HVLP technique is skills-driven and requires competent painters to carry out the functions of booths embedded with this spraying technique.