Most beginner modellers have a poor understanding of the tools that are needed to work in this direction. One of the most important of these is the airbrush.
Airbrush in section.
Today, the modern market offers a wide range of such devices. Therefore, it is often difficult for a beginner to figure out how to choose an airbrush correctly. Below are discussed in detail the varieties of this tool, as well as its features, which should be aware of before purchasing.
The principle of the airbrush
Before proceeding to the selection of a suitable device, it is necessary to understand the principles of its operation. This tool serves as a pneumatic sprayer. In other words, it extracts a thin stream of high-pressure air flow. Due to this, a sparse portion of air is formed around the stream. If a certain type of material (loose or viscous mixture) falls into this area, the process of spraying will begin. Thus, an aerosol effect will occur.
The choice of airbrush depends on the object of painting, for example, a car needs a double action tool with a needle.
Aerosol is small particles mixed with air flow that move in a certain direction. As a rule, such a method is used in painting a specific surface so that the particles can settle on the coating, forming a uniform and uniform in thickness layer. Successful aerosol spraying and high-quality surface painting are achieved due to factors such as:
- competent selection and level of training of the material used;
- operating procedure;
- quality pneumatic spray.
At the same time, the first 2 points are not as important as the last, since the correct choice of the device will allow the novice modeller to concentrate on other aspects of this activity that are not related to the functionality of the tool.Back to table of contents
Varieties of airbrushes
Depending on the airflow from the sprayer, the airbrush for modeling can be either in-line or lockable.
The first type of sprayer operates according to the principle of a constant supply of air without controlling its speed and quantity, the second allows you to control the air flow with a special trigger. Depending on the type of airbrush, the source of flow is selected: gas or air.
The main characteristic of an airbrush is the diameter of its needles and nozzles, which determine the potential of the tool.
At the same time, pneumatic sprays can vary in the type of mixer:
The design of the first mixer differs in that air and paint are mixed directly inside the nozzle for spraying. The device allows such an airbrush to move the nozzle.
Based on the name, the design of the second mixer involves mixing both flows from the outside of the device. It is designed so that it does not necessarily use the nozzle. If it exists, it will be fixed.
The main advantages of sprayers with an external mixer is a simple assembly, strength (subject to the quality of the device itself) and low cost. Their disadvantage is that they are intended only for processing large areas. Hard-to-reach and small areas cannot be processed with such airbrushes.
With sprayers with an internal mixer, everything is exactly the opposite: they are designed to work with small areas and have a not very high margin of safety. Therefore, such airbrushes require careful handling.Back to table of contents
Spray adjustment mechanisms
Airbrushes are divided into: double independent action, double dependent action and single action.
Types of pneumatic nozzles vary according to the method of adjustment in the course of work.
There are airbrushes with the function of controlling the air flow and with the ability to adjust the flow of paint individually. In both models, the flow control is performed using a special trigger, which moves only downwards.
At the same time, the market provides a more complex structure, which involves adjusting both flows with one trigger. In other words, by lowering the trigger in a downward direction, you increase the air supply and reduce the flow of paint. Accordingly, moving it upwards, you get the opposite result. Such airbrushes require certain skills and skills, since the streams must be tuned very carefully and competently.
In addition, there are also pneumatic sprays with the same control over both streams, that is, as you increase the air jet, you increase the ink jet. Such devices are configured in a special way: when you move the trigger, first the air flows, and after a while - the paint flow. When you turn off the tool, the same principle applies, that is, the ink jet is slightly delayed in relation to the air flow.
It is worth remembering that the adjustment tool is made in the process of dyeing. Do not confuse these settings with the configuration of the tool that is made in advance. At the same time, it is necessary to take into account that the trigger controls only the flow rate. In other words, they do not affect the rate of air pressure or paint.
Airbrushes may vary depending on the type of dye liner and the placement of the canister for the material used. Devices with eyeliner dye bottom function due to the vacuum pressure, which is formed in the zone of the mixer.
According to the type of paint material supply: with the bottom material feed, with the top material feed and with the material feed under pressure.
Devices with eyeliner dye from above work not only on the basis of the vacuum pressure, but also due to the mass of dye used. The material used also serves as a pressure source. Airbrushes with dye liner under pressure are designed so that it is possible to spray paint with an increased degree of viscosity.
Placement of the dye container on devices with different eyeliners may differ, but in most cases the spray can is located on the side of the airbrush. It is recommended to choose an airbrush with an orientation to the type of dye liner, since this factor strongly influences the degree of viscosity of the material during spraying.
Dye nozzles are divided into several categories, depending on their placement on the airbrush:
- fixed by screwing;
- fastened by a conic method;
- fixed by the combined method;
- having a floating landing.
The method of placement of the nozzle of the dye affects the complexity of maintenance of the airbrush. In the first case, it is necessary to assemble the device very carefully, since this part is quite fragile, not to mention the fact that if it breaks, its fragments are difficult to remove from the airbrush (in some cases it is even impossible).
As a result, an expensive device will become unsuitable for further use. Therefore, on sprayers with a screwed nozzle, it is undesirable to use third-party airbrush kits.
In working with an airbrush, a stencil is usually made of cardboard, thick paper, film or special foil.
The remaining types of nozzles are considered more reliable. With them, you can use additional sets of nozzles without any danger of damaging the tool. You will be able to upgrade your sprayer, creating different configurations. The standard airbrush kit includes the following parts:
- nozzle (needle);
- dye nozzle;
- air flow nozzle
Sprays are divided into several types according to the presence of regulators for the configuration of the tool before starting work:
- dye flow limiter;
- dye flow controller;
- airflow configuration controller.
The first device is placed on the fingerboard and serves as an element that limits the movement of the nozzle. Certain types of this mechanism have built-in memory.
The second mechanism is built directly into the sprayer. By tightening the trigger nut backwards, you can pre-adjust the pressure with which the dye will be supplied. This greatly simplifies the operation of the airbrush, but such a device can only be used on tools with a dye liner from below.
The third device looks like an air valve that is built into the sprayer or located directly on the valve of the instrument itself.
Preliminary configuration of the airbrush greatly simplifies the process of using the tool. In particular, this applies to the last two controllers.Back to table of contents
How to choose a suitable airbrush?
First of all it depends on your qualification and awareness in modeling. Beginners are not advised to purchase expensive tools, as they may contain fragile parts that quickly break without a proper approach. Therefore, it is desirable to acquire a simplified model of an airbrush, and with the advent of the necessary experience and skills, you can look closely at more sophisticated tools.
When buying, you should also pay attention to the power of the compressor, which serves as a source of air flow. For voluminous work with a large shading area, a model with a more powerful compressor should be selected.
If your activity is connected only with small and hard-to-reach areas, it is necessary to choose an airbrush with a minimum nozzle size.
In addition, the flow mixer must be located inside the tool. For work with areas of medium size, a nozzle with a diameter 1.5 times larger is selected. Such a device may have an external mixer. Accordingly, it will cost less.