Spray painting

From Wikipedia, the free encyclopedia

Spray painting is painting using a device that sprays the paint.

There are several different technologies for doing this.

Canned spray paint: The most common type in the consumer market is an aerosol can of spray paint.
Semi-professional spraypainting: there are a variety of hand-held paint sprayers that either combine the paint with air, or convert the paint to tiny droplets and accelerate these out a nozzle. Commercial examples of this include the popular product the Wagner PowerPainter(tm).
Professional spraypainting: Automobile body shops use air compressors and specialized equipment to spray paint onto a car body. This can be expensive, with a high-quality car paint job costing from $2000 to $5000. The high cost is due to the high quality paints, the laborious nature of surface preparations, and the cost of the equipment to do this task. Anest Iwata is a popular brand of spray gun among these painters. This can be done using rotational bells (always electrostatic) or pneumatic guns (electrostatic or not)
Conventional spray guns use a compressor to atomize the coating (Paint). General rule of thumb is that this type of gun puts 1/3 of the coating on the substrate being coated and 2/3 into the air.
HVLP Spray Guns either use a turbine or a compressor to supply atomization air. A high volume of air flow with low air pressure (HVLP) is used to create a high air flow through the air cap creating a high velocity of air flow that is used to atomize the coating. Basic rule of thumb is this method puts 2/3 of the coating on the substrate and 1/3 in the air. True HVLP guns use 8 to 20 cfm and a minimum 5 hp industrial compressor is required. Using a special conversion regulator a true turbine HVLP gun can be used with this type of compressor to supply the best finishing results.
LVLP Low volume Low pressure designed to provide transfer efficiency similar to HVLP equipment. True HVLP equipment has the most effective transfer. AccuSpray Technologies remains one of the only and oldest USA developers and manufactures of HVLP and LVLP equipment used in home to factory environments.
Air Assisted Airless spray guns use air pressure and fluid pressure (300 to 800 psi) to achieve atomization of the coating. This equipment provides high transfer and increase application speed but is best used with flat line applications. Commonly found in factory finish shops.
Airless spray guns operate connected to a high pressure pump commonly found using 800 to 3000 psi pressure to atomize the coating using different tip sizes to achieve desired atomization and spray pattern size. This type of system is used by contract painters to paint at a fast pace difficult thick coatings used in the construction field or industrial environment.