Today everyone has heard of the existencesandblasting. This is a great way to finish a variety of surfaces. Using this method, you can effectively degrease, clean, remove old coatings, prepare products for subsequent finishing works. Sandblasting equipment is used even for grinding glass. It is not necessary to have a stationary device. If there is a compressor, it is enough to buy a sandblasting gun and take full advantage of this processing method.
To begin with, in which areas you can applythis equipment. The most well-known method is the cleaning of metal surfaces in car body repair. Also, the technology is good for preparing rims before painting. In stationary devices, high pressure is created, with the help of which a jet of sand knocks residual lacquer, soil, scale and corrosion products from the metal.
The metal that was treated in this way afterthe completion of a full cycle of work will last longer due to the fact that this method of cleaning is much better than any other. Small grains of sand at an enormous speed cut into the surface being cleaned, beating off rust, which is necessarily located in the pores of the metal or in the cracks. Often this can not be achieved in any other way.
Sandblasting gun may not needOnly specialists in the field of auto repair. It should be in the arsenal of every motorist and home craftsman. In addition, using such a treatment, it is possible to clean up old coatings and traces of rust, the surface after sandblasting will be smoother. There are no scratches, which are after cleaning with brushes, sandpaper. This facilitates the process of applying a base layer of soil and increases adhesion with the metal.
Кроме обработки кузовов, пескоструй широко used in other areas of activity. With the help of large machines they effectively clean ships, various elements at factories and industrial plants. In addition to metal, sand blasting allows you to clean and other materials. This is wood, brick, concrete.
On wood and glass you can get interesting effects and ornaments. With the help of sandblasting matting glass, which will then be used as a decorative element.
The sanding gun consists of severalbasic elements. This is the case and the handle. There is also a nozzle. A fitting is provided for connecting compressed air, and in some models there is also a valve for adjusting the pressure.
A control sleeve is necessary to ensuresettings for the consumption of abrasive materials. The cap nuts or pins that attach the internal nozzle to the instrument body reduce the risk of leakage of the working mixture. There is also a threaded sleeve, which is needed to attach the container with an abrasive.
In addition to the external, there is also an internal nozzle for a sandblasting gun. It has an injection profile and the shape of a truncated cone. The diameter of the latter narrows as the air flow.
Sandblasting gun for compressorused for pretreatment of the surface. Today, this equipment is commercially available - it can be easily purchased in stores. But the choice should be approached as responsibly. Low cost devices can not boast of quality, and professional have too high a price.
Works sanding gun as follows.The device is based on the nozzle and the trigger hook. Compressed sand and air are supplied through a compressor through this nozzle. The latter is fed through a hose connected to the gun to a special fitting. When you press the trigger air is supplied under high pressure to the nozzle. This is how most models of pneumatic equipment work.
Здесь задействован принцип инжекции, когда в The flow of compressed air supplied from the compressor through the gearbox, artificially creates pressure drops. Due to this, the air flow rate and kinetic energy increase. The air is weighed down with sand or other abrasive materials.
Such sandblasting guns will be more effective.chambers for sandblasting. Chambers are bulky uncomfortable designs. In addition, these tools need special care. The injection gun is more compact. easy, and all care comes down to purging.
A nozzle is mounted on the device body, the size of which is selected in accordance with the pressure that the compressor develops. The choice of nozzle depends on the diameter of the internal injection hole.
A tank or a hose is connected to the handle.Since abrasive dust can get into the lungs of a person, it is recommended to work while observing safety precautions. Then turn on the compressor and with the help of the control sleeve regulate the pressure of the air flow.
For nozzles with diameters of six and two millimeters, the compressor should provide a flow rate of 0.2-0.3 m3/ min If the nozzle on the sandblasting gun has a diameter of eight millimeters, and the internal hole has a diameter of three, the air flow should be 0.6-0.6 m3/ min For 10 mm holes - 0.6-1.3 m3/ min For nozzles 12 millimeters - 0.9-1.8 m3/ min
Smaller flow rate corresponds to lower air pressure and distance from the nozzle end to the surface.
Может использоваться и другой принцип.Abrasive material is ejected from the nozzle. If there is a sufficiently powerful compressor with a significant air flow (from 600 to 800 liters per minute), the mixture can be pumped directly through the gun. According to this principle, an ejection sandblasting gun for a compressor works. But they are not so widespread - to clean a single unit of area requires high costs.
Work with such equipment is limitedtank capacity. When the sand is over, it should be refilled. These devices are perfect for work on relatively small areas. Also, the device will show itself well if the surface is flat.
These sandblasted air guns are less mobile, but you can work longer. At the same time there are no restrictions on the complexity of the treated surface.
К устройству подведено два шланга.One of them serves to supply air from the compressor. The other provides abrasive feed. These are more convenient and compact solutions - there is no bulky tank here and it is better suited for handling hard-to-reach places. A sandblasting pistol with a hose is an excellent purchase for a garage.
In many ways, the effectiveness of using thesetools depends on the quality of the nozzles used. This is a very important element of the design. Produce them from ceramic materials or brass. The most important characteristics for this element are the type of hole, its diameter, length, and also material.
По диаметру сопло подбирают в зависимости от compressor features. The capacity of the installation depends on how much power the jet has or how much air can pass through the nozzle one unit of time.
Что касается мощности воздушной струи, то она directly proportional to the volume of air passing through the nozzle for one unit of time. To increase the power you need to choose a hole with a large diameter.
So, if we assume that the nozzle with a hole in sixmillimeters - this is 100 percent of the power, then the other nozzles are selected as follows. Eight millimeters - 157 percent, 9.5 - 220, 12.5 millimeters - 400.
The nozzle can be made by hand. But it is better to buy a standard factory product. The sizes offered in stores are from 6 to 12.5 millimeters.
The length is chosen according to how pollutedsurface to be cleaned. For surfaces that are only slightly contaminated, choose short tips of seven to eight millimeters long. If processing of more complex areas is required, the length can be significant - up to 230 millimeters. Short nozzles are used when working in hard-to-reach places.
A nozzle with a constant diameter along the entire length is capable of providing an abrasive output at a speed of up to 320 kilometers per hour. The pressure at the outlet will be about six atmospheres.
These products form a higher speed.jet. So, the speed can reach up to 720 kilometers per hour. Such products can improve the quality of processing. It is important that the use of nozzles with a channel of this type does not require special abrasive materials and does not lead to increased air flow. Also feature of these nozzles is that they can not make their own hands.
Any types of sandblasting guns will beeffective only with the right choice of nozzles. For everyday tasks suitable cast iron and ceramic products. But they are not recommended for large-scale work. So, they quickly collapse, which leads to an increase in the consumption of air and abrasive material.
For professional sandblasting gunsmore costly solutions are recommended. They are made mainly of carborundum, tungsten carbide or boron. They are characterized by high durability as well as versatility in terms of the choice of abrasive materials.
When choosing a sandblasting gun, it is important to considernot only the characteristics of the device, but also the capabilities of the compressor. An important parameter when choosing is the air flow. For normal operation with this kind of tool, the compressor capacity should exceed this gun value by 20-30 percent.
The pressure of modern models thatrepresented on the current market, can range from three to ten atmospheres. If you want to perform work on the decoration of various surfaces, the choice is recommended to stop on low-power models. For processing of concrete, metal and other materials you need to purchase models that are designed only for high pressure.
Much depends on the design of the gun.It has already been noted above that there are pistols with a tank and models with a hose. The first are needed for processing small areas. The second can be processed fairly large areas, as well as hard-to-reach places.
There are several models on the market. They all differ in different characteristics and features. Compiled a small rating on reviews of sandblasting pistols.
This is the perfect tool. It is equipped with a tank that allows the gun to be more mobile.
The handle is quite comfortable and does not slip in your hand. Combined rapid and bayonet-based joints make work much easier. The hook allows you to keep the device suspended.
This device is one of the best fordecorative processing. It is also equipped with an abrasive tank. This is German quality, although the model is not professional, but rather household. The cost of this solution is very affordable and amounts to about three thousand rubles.
This sanding gun with a dust collector will be suitable for professionals. It will be indispensable in automotive workshops and small industries. Included are several nozzles.
So, we found out what a professional sandblasting gun is, how it works and how to choose it correctly.
