The airless spray device can be represented by various types and models, but they are based on the general principle of operation and differ in characteristics. The application of paint is carried out by pumping liquid through the nozzle of the device. It acquired its name due to the lack of an air compressor. Among the positive aspects, it is worth noting the rapid conduct of a large amount of work and the high-quality supply of the coloring composition.
Progress
First, the surface must be prepared for painting. Those places where paint is not desirable are covered with polyethylene. Clothing and hands should also be protected. The spraying process is characterized by the formation of a cloud of paint, which is why tiny particles disperse everywhere. To prevent harmful effects on the body, you must use a respirator, glasses and a special suit.
When carrying out internal work, walls, floors, and other elements, such as switches, door hinges, and handles must be protected. If painting is carried out outdoors, it is worth remembering that the paint is quickly spread by the wind and settles on all surfaces in a radius of 7-10 meters.
The Wagner spray gun should be perpendicular to the plane to be treated, and moved in uniform stripes. The ink supply is switched on only after the device starts moving.
The appliance is thoroughly cleaned after each use, and it is important that the cleaning is done before the coloring compound begins to dry. This will provide better work and extend the life of the device.
Features
If misused, you can accidentally spoil the appearance of objects, so work must be carried out in accordance with all the rules.
Of particular importance is the correspondence of paint and solvent, for example, water cannot be used to dilute an oil substance.
The nozzle is small in size, because of which it can often become clogged with grains of dried paint, small debris. If specks enter a jar with a coloring composition, it should be filtered through a sieve of synthetic material.
The best option is an airless sprayer with a replaceable nozzle, thanks to it you can quickly replace the clogged nozzle and get back to work.
Security measures
Paint is supplied under high pressure. There is a risk of injury when pointing the device to any part of the body. At the same time, noticeable damage to the skin may be absent, while the substances have already penetrated the circulatory system or soft tissues. In any case, you must urgently go to the hospital.
The Wagner airbrush is suitable for almost all types of materials, except textured ones.
The device may be under pressure even after being disconnected from the power supply. After completion of use, it is necessary to relieve pressure by directing the nozzle to a safe place and simultaneously pressing the feed lever or opening the valve.
Advantages and disadvantages
The absence of fog is the main advantage of using airless technology. It is also worth noting the high performance, which air and combined techniques can not boast of. In addition, the airless spray gun is characterized by a sufficient speed, the ability to use a small amount of diluting compositions, distinctive autonomy, ease of use and movement, as well as low material consumption.
Despite the many advantages, there were drawbacks, including the quality of the coating formed by the airless method, which loses noticeably compared to the result obtained using a pneumatic device.
An airless spray gun is not capable of producing a wet film with a thickness of 100 microns, and the equipment is quite expensive.
What do you need to know?
The device is designed for work both indoors and outdoors. The optimal compositions for use are varnishes, polishes and water-based paints, characterized by quick drying. Some devices may also act as a duct.
The choice of an airless spray gun is optimal for working with building dyes and soils, subject to industrial processing or the distribution of paint on an extensive plane to obtain a coating that does not claim to be of high quality. Also, the device is convenient for processing wood material with flame retardants and metal objects with compounds that prevent the development of corrosion.
The tool consists of a handle, a power cord, a spray regulator, a fastener, a shutdown button, a replaceable nozzle, a paint container, and an electric motor.
How does an airless spray gun work?
The location of the container influences the distribution of the processing media. On the body of the device there are tanks, of which the paintwork material flows by gravity due to vacuum, then the plunger pump ensures the exit of paint from the device. The airless technique is characterized by a sharp decrease in pressure in the nozzle, that is, the paint is in normal atmospheric conditions after being under pressure within 500 atm. inside the tool. The flow rate is slowed down by the air, which acts as a braking medium and provides surface coverage.
An airless high-pressure spray gun creates a torch, characterized by a sharp delineation of the spot area and the same droplet size. The nozzle settings and its replacement with another option allow you to change the shape of the torch. It is possible to obtain various stripes, dots or spots, as well as changing the thickness of the applied coating.
rules
Compliance with the established rules allows you to achieve the desired result of work and extend the service life of the device:
- Before starting work, it is mandatory to check the tightness of the tube in the inlet;
- old paintwork may have an unsuitable consistency; to check this, it is necessary to strain it through a sieve;
- for materials with different densities, appropriate nozzles are used;
- the use of certain materials is possible only after bringing to the required consistency;
- the airless spray gun should be cleaned immediately after each use;
- addition of lubricating components requires paints, which include latex, which makes up more than 20% of the total mass;
- nozzles should be systematically checked for damage;
- electrical elements of the device must not come into contact with liquid;
- if long-term storage is planned, the piston and cylinder are lubricated with a special compound.
Air and airless spray gun: differences
The method of distribution of the coloring material is the main difference. Air technology provides the supply of paint with a stream of compressed air, and not a piston element. For this, an external or built-in compressor is used. The first option opens up more possibilities for application, despite the lesser mobility of the device. The device lies comfortably in the hand and does not transmit vibration to it.
Airbrush for home based on air technology provides a higher quality coating due to the use of compositions with liquid consistency. It is optimally suited for a small surface and is indispensable if you need frequent replacement of the paint composition. At the same time, it is worth noting the main drawback, which is the high formation of fog, which contributes to an increase in the consumption of paint and varnish material.
One type of air device is electric rollers. They differ from spray guns in their structural elements and the replacement of the spray part with a roller, which allows you to evenly distribute the paint.