intelligent spray painting robot

JERRYS Intelligent Spray Painting RobotCommon Spray Painting Processes for Coating

JERRYS ROBOT

1. Roller Coating

Roller coating uses a rotating roller as the carrier for the coating material. The coating forms a wet film of a certain thickness on the surface of the rotating roller. Then, as the roller rotates and comes into contact with the object to be coated, it applies the coating material onto the surface of the object. Roller coating is suitable for flat-shaped objects, and is widely used in coating metal plates, plywood, fabrics, and paper, especially for coating metal coils.

2. Air Spray Painting (Spray Gun with Compressed Air)

Air spray painting is a widely used coating process in current paint coating construction. It uses the airflow of compressed air to flow through the nozzle of the spray gun, creating a negative pressure. This negative pressure draws the paint from the suction tube, which is then sprayed out through the nozzle to form a paint mist. The paint mist is sprayed onto the surface of the parts to be coated, forming a uniform paint film.

3. Electrostatic Spray Painting

Electrostatic spray painting is divided into liquid electrostatic spray painting and powder electrostatic spray painting. Its principle is to use a high-voltage electrostatic electric field to make negatively charged coating particles move in a direction opposite to the electric field, and adsorb the coating particles onto the surface of the workpiece, which is a spray painting method. The electrostatic spray painting equipment consists of a spray gun, a spray cup, and a high-voltage power supply for electrostatic spray painting, etc. Liquid electrostatic spray guns are divided into manual water-based and oil-based electrostatic spray guns, automatic water-based and oil-based electrostatic spray guns, automatic water-based and oil-based electrostatic rotary cup atomizers, etc. The paint supply system is generally divided into low-pressure paint delivery pressure tanks or diaphragm pumps, high-pressure plunger pump paint supply systems, automatic paint proportioning and mixing systems, automatic color change control systems, automatic cup head cleaning control systems, precision flow closed-loop control systems, gear pump precision flow control systems, etc.

4. Electrophoretic Spray Painting

Electro-coating is a coating method that uses an applied electric field to make pigment and resin particles suspended in the electrophoresis liquid migrate directionally and deposit on the surface of a substrate that serves as one of the electrodes. The principle of electro-coating was invented in the late 1930s, but the technology was developed and industrialized after 1963. Electro-coating is a special film-forming method developed over the past 30 years, and it is the most practical construction process for water-based coatings. The electrophoretic process is divided into anodic electrophoresis and cathodic electrophoresis. If the coating particles are negatively charged and the workpiece is the anode, the coating particles deposit on the workpiece to form a film under the action of electric field force, which is called anodic electrophoresis. Conversely, if the coating particles are positively charged and the workpiece is the cathode, the coating particles deposit on the workpiece to form a film, which is called cathodic electrophoresis. The power supply coating process is generally used in the pretreatment primer anti-rust of automobile bodies, and it is an all-round, dead-angle-free electrophoretic process. It has characteristics such as water solubility, non-toxicity, and easy automation control, and has been rapidly and widely applied in industries such as automobiles, building materials, hardware, and home appliances.

5. High-Pressure Airless Spray Painting

Also known as airless spray painting, it refers to using a high-pressure plunger pump to directly pressurize the paint to form high-pressure paint, which is sprayed out through a manual or automatic spray gun to form an atomized airflow that acts on the surface of an object (wall or wood surface). Compared with air spray painting, this method produces a uniform paint film without particle sensation. Since it is isolated from air, the paint dries cleanly. Airless spray painting can be used for constructing high-viscosity paints, and it has clear edges, making it even suitable for some spray painting projects with boundary requirements. For example: anti-corrosion spray painting for steel box bridges, anti-corrosion spray painting for ships, construction machinery industry, anti-corrosion spray painting for bridge and railway pads or shock-absorbing supports. Depending on the type of machinery, it is also divided into pneumatic airless sprayers, electric airless sprayers, internal combustion airless sprayers, and many other types. Different spray painting methods are selected according to different spray painting processes, and the application of intelligent spray painting robots is the future development trend.