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Overspray Research Paper

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An ideal facility for painting is a clean, well lit, temperature controlled paint shop, however if one is not available and you must create your own painting location, you do not want to paint: • Outside in fog or high humidity • Outside in direct sunlight • In the wind • In a dusty place • In a rented or borrowed spray booth where you can't take your time Also, keep in mind that certain locations require the user of solvent based paints to filter overspray and have a method of collecting waste. The four basic methods of applying paints are: (1) Airless spraying (2) Electrostatic spraying (3) Conventional pressure fed gun (4) High-Volume, Low-Pressure (HVLP) systems Airless sprayers force paint through a small opening at high pressures. …show more content…

The pressures are so high that the paint is atomized and can be applied to the surface. The major disadvantage of this system is that the paint particles are traveling so fast when they reach the surface, many will actually bounce off and gather in the air. This is called overspray. HVLP systems were designed to address overspray. A HVLP system is, in essence, a modified pressure fed system. A HVLP spray gun gathers the air inside the gun and send it downstream with as little pressure drop as possible. Two types of HVLP spray systems are available: a conversion spray gun and a turbine system. A conversion spray gun uses high pressure air, but drops the pressure before it goes into the gun. This type of system requires a high capacity air compressor with moisture traps. A turbine system simply supplies a large amount of air (via turbine) to the gun; high pressure is not necessary. The turbine is typically powered by a high-speed electric motor. The heat from the turbine eliminates up to 95% of the moisture in the air. This type of system is sold with a turbine, hose, and spray gun. Most of the cost is from the spray gun and not the turbine due to the machining requirements of the

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