types of spray gun

this is about types, purpose, and function of spray gun in automotive

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2. SPRAY GUN A Spray gun breaks the liquid sealer, primer, paint, and so on into a fine mist and forces it onto the surfaces of the vehicle. It is the key component in a refinishing system. A quality spray gun is a precision-engineered and manufactured tool. There are many spray gun types and sizes. Each is specifically designed to perform certain task. Even though all spray guns have common parts and components, each gun type or size is suited only for a defined range of jobs. PRESENTATION TITLE 2

3. TYPES OF SPRAY GUN Air (Pneumatic) Spray gun Airless spray gun Air-assisted airless spray gun Electrostatic spray gun Pressure feeding air spray guns HVLP (High volume Low pressure) spray gun LVLP Spray Gun  PRESENTATION TITLE 3

4. Air Pneumatic Spray gun A pneumatic spray gun is a painting tool that uses compressed air from a nozzle to atomize a liquid into a controlled pattern. Here are some specifications of a few different pneumatic spray guns: Working pressure from 3 to 7 bars Can only be used with 310 ml cartridge of sprayable sealer Light weight (1.1 kg) Easy to adjust Independent possibility of regulating the spraying and the quantity of product

5. Pneumatic Spray Gun PRESENTATION TITLE 5 P neumatic spray gun  is to apply a smooth and even coat of liquid onto a surface. The compressed air supplied by an air compressor atomizes the liquid into a fine mist, which is then sprayed onto the surface to be painted. Pneumatic spray guns are commonly used in the automotive industry, woodworking, and other industries where a smooth and even finish is required. They are also used in painting large surfaces, such as walls and ceilings.

6. Airless Spray Gun A airless spray gun uses hydraulic pressure rather than air pressure to atomize paint material. With the airless spray method, pressure is applied directly to the paint, which is ejected at a high speed through small holes in the nozzle and formed into a mist.

7. Air-Assisted Airless Spray Gun An air-assisted airless spray gun is a hybrid between an air sprayer and an airless sprayer. It uses a high-pressure fluid stream, like an airless sprayer, and compressed air at the cap, like an air sprayer, to produce a spray pattern similar to that of an air sprayer and the speed and transfer efficiency of an airless sprayer. Air-assisted airless spray guns first partially atomize the fluid with a special fluid nozzle tip similar to a standard airless tip, and then complete the atomization with small amounts of compressed air from the face and/or the horns of the air nozzle that they use. It is used to spray medium to high viscosity fluids and delivers a finish quality that is better than airless, but not as high quality as air spray .

8. Electrostatic Spray Gun PRESENTATION TITLE 8 Electrostatic spray gun the principle that positive (+) and negative (-) Electrical charges mutually attract each other but oppose a like charge. Therefore, when paint particles are given a negative charge by a high-voltage generator, the particles oppose each other, causing them to become atomized. This causes more of the paint overspray to be attracted and pulled against the vehicle body. Less paint is wasted as overspray. It should be mentioned that this type of spray equipment is generally not used in the auto body shop.

9. HVLP Spray Gun  PRESENTATION TITLE 9 The high-volume, low-pressure (HVLP) spray gun (also known as the high-solids system) uses a high volume of air delivered at low nozzle pressure to atomize paint into a pattern of low speed particles. This type of system is required in many areas to pass strict air emission or pollution standards. The most important way it differs from conventional spray systems is its high transfer efficiency. High-transfer efficiency means that more of the material leaving the gun stays on the surface being refinished. Less material is wasted and is prevented from entering the atmosphere as air pollution. This is the primary purpose of HVLP guns The high pressure of conventional spray guns tends to “blast” the paint into small particles. In the process, it creates a fair amount of overspray. The transfer efficiency of high-pressure systems suffers as a result of overspray, particle “bounce,” and blow back. HVLP will work with any material that can be atomized by a spray gun, including two-component paints, urethanes, acrylics, epoxies, enamels, lacquers, stains, primers, and so on. HVLP spray guns have a thicker body to allow for larger internal air passages. Larger air passages are needed because HVLP spray guns are designed to operate on lower line or hose pressures.

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11. HVLP PRESENTATION TITLE 11

12. LVLP Spray Gun  PRESENTATION TITLE 12 These guns use a low volume of air at low pressure to atomize the paint and create a fine mist. They are ideal for small to medium-sized projects and can be used with a variety of coatings, including lacquers, stains, and enamels. LVLP paint guns, like HVLP guns operate at a low pressure but they use lower volume of air when compared to other types of air paint guns. Due to the fact that LVLP guns use a lower volume of air, they have an even higher transfer rate of paint than HVLP guns and LVLP guns don’t need the same amount of capacity for air compressors and you can use a smaller air compressor if you don’t have a large one.

13. PRESENTATION TITLE 13 Pressure feeding air spray guns is where a spray gun is attached by hoses to a remote pump or pressurised paint tank to deliver paint to the spray gun instead of using a paint cup attached directly to the spray gun. A pressure feed spray gun is a type of spray gun that utilizes a pressure tank with dual regulators to give you precise control over the pressure of fluid both to the material and to the air that breaks the material up (the atomization air). Pressure pot feed spray guns offer excellent versatility in what you can use and also provide you maximum control of the amount of material coming out the nozzle. Pressure feeding air spray guns

14. Distance Each type of spray gun has a different distance that is best to hold it from the products surface. For an HVLP Spray Gun, you should typically hold the spray gun 6 – 8 inches from the products surface. For a conventional spray gun, a bit of a greater distance like 8 – 10 inches is typically better. PRESENTATION TITLE 14

15. Angel Many users have difficulties applying internal coatings in small spaces. An effective solution to this issue is to use of a long nozzle with a small head. PRESENTATION TITLE 15

16. 3 types of nozzle Flat cone Flat nozzles produce a line of spray. They are often used in coating and cleaning applications on conveyors where product is passed under a spray bar of several fan nozzles. Spray Angel include45° diagonal 90° horizontal120° angel upward Hollow cone Hollow cone nozzles produce a ring of spray. This spray pattern will generally consist of the smallest droplet sizes of any spray pattern. Angel This cone range from 30 to 170 degrees in spray angle depending on the nozzle design or size. Full cone Produce a solid circle of spray. These nozzles are used when the objective is to distribute the fluid evenly over an area. Angel the spray Angle range is 10°- 170°, and the spray area is round depending on the design or size PRESENTATION TITLE 16

17. 3 Types of nozzle PRESENTATION TITLE Flat cone Hollow cone Full cone 17

18. Spray Pattern The spray pattern means the cross sectional shape of spray. Selecting a suitable spray pattern for each application achieves the most efficient spray performance. Spray pattern changes as the spray pressure is gradually increased from low to high. PRESENTATION TITLE 18

19. The flat fan deflector tongue-type nozzle is a unique design. The flat fan pattern is generated by a solid stream, where the liquid exits the orifice upon an external deflector plate (“the tongue”). PRESENTATION TITLE 19 Flat cone pattern

20. Hollow cone pattern PRESENTATION TITLE 20 Hollow cone pattern flow design, the rotary motion of the liquid is generated by the swirl insert or vane, which creates uniform droplets in a ring pattern.

21. Full cone pattern PRESENTATION TITLE 21 Full cone pattern spray completely within the interior of a circular area and provide full coverage.

22. TYPES OF SOLID COLOR PAINT Single Stage Paints: These paints combine the color and clear coat in one application. They are simpler to apply but may not provide as much depth or durability as multi-stage systems. PRESENTATION TITLE 22

23. Basecoat: This type involves applying a colored base layer first, followed by a clear coat. It allows for better color matching and often results in a more vibrant finish. PRESENTATION TITLE 23

24. Acrylic Enamel: Known for its durability and glossy finish, acrylic enamel is a popular choice. It requires a separate clear coat for added protection. PRESENTATION TITLE 24

25. Urethane: Urethane paints offer excellent durability and chemical resistance. They are commonly used in modern automotive finishes . PRESENTATION TITLE 25

26. Water-Based Paints: Increasingly used for environmental reasons, water-based paints emit fewer volatile organic compounds (VOCs). They provide good coverage and are eco-friendly. PRESENTATION TITLE 26

27. Solid Metallic Paints: These are solid colors with metallic flakes added, providing a subtle shimmer. They often require a clear coat for protection. PRESENTATION TITLE 27

28. Matte and Satin Finishes: These finishes lack the glossy appearance of traditional paints and are popular for achieving a unique, understated look. PRESENTATION TITLE 28

29. Thank you!