What Is Painting Machinery?
Painting machinery is the equipment used for spraying paint.
Conventionally, when applying paint, uneven, three-dimensional areas are covered with a brush, while flat areas are covered with a roller.
However, the larger the area to be painted, the more workers are required and the more time is needed to apply the paint, resulting in more labor hours.
In such cases, the use of painting machinery can reduce the number of labor hours required for painting, and since the paint can be applied more evenly than with brushes or rollers, the surface can be painted cleanly.
Uses of Painting Machinery
Painting machinery is mainly used to paint civil engineering structures such as buildings, exterior walls, and bridges.
Since the price per unit is high for a machine, they are used for painting large areas.
The machine can be used to apply a variety of paints, from general paints for construction to heavy-duty anti-corrosion paints for use in harsh environments.
The main precaution in use is to clean the inside of the equipment with a dedicated cleaning agent, as paint residue left inside the equipment after painting may cause problems the next time the equipment is used.
In recent years, painting machinery has also been sprayed with a stripping agent to remove old paint during renovations.
Principle of Painting Machinery
The principle of painting machinery differs depending on the type.
Diaphragm Type Airless Coating Machines
Diaphragm airless coating machines use electricity or an engine to spray paint, and do not use a compressor.
Two nozzles, one for spraying and the other for sucking up the paint, come out from the main body of the machine. The nozzle for sucking up the paint is placed in the container containing the paint.
When the equipment is turned on, it applies high pressure to the paint, which is then used to draw the paint up. A fine filter at the tip of the nozzle prevents paint clumps from entering the equipment.
The sucked-up paint is then ejected from the spray nozzle and applied. The advantage of this method is that it does not use air, so paint is not likely to be scattered around the equipment when spraying.
Pneumatic Painting Machinery Using Compressor
Pneumatic painting machinery using a compressor is also available. This type of machine sprays paint onto compressed air.
The pneumatic type allows for a more uniform coating of the painted surface. However, more paint will be sprayed onto the surrounding area.