How to make a purge gun out of a pumping gun. How to make sandblasting from a plastic bottle and a blow gun with your own hands

Dear visitors of the site "", from the material presented, you will learn how to make a simple sandblaster yourself from a blow gun and plastic bottle with your own hands. Sandblasting is designed to clean metal surfaces from rust by supplying an abrasive-air jet. In this case, the simplest and most budgetary one will be assembled, for which you will need a standard blow gun and a plastic bottle with a volume of 1-1.5 liters.

First you need to prepare the bottle and remove the strip from the neck (cut it off with a knife), then a hole is drilled directly in the place where the strip was, the diameter of the drill used should be identical to the diameter of the blow gun nozzle (it can be a little smaller so that the nozzle fits snugly into the plastic hole) In the nozzle gun, a hole is sawn with a file, so that when inserted into the neck of a plastic bottle, the hole is in the center.

Operating principle: We fill the bottle with sand, insert it into the hole made, connect to the compressor. Sand under its own weight will fall down, namely into the nozzle where it is picked up by the pressure of compressed air and fed to the outlet. Everything is quite simple and clear.

Let's look at what exactly is needed to assemble a sandblaster.

materials

  1. blow gun
  2. plastic bottle 1-1.5 l
  3. reinforced hose
  4. compressor
  5. sand

Instruments

  1. file
  2. drill
  3. glue gun
  4. marker

Step-by-step instructions for creating a sandblaster.

And so, to assemble the sandblaster, we need: a plastic bottle, a blow gun, a drill according to the diameter of the gun nozzle.
Cut off the strip on the neck of the bottle under the cork.

A hole is drilled in the place where the strip was. We try on the nozzle by inserting it into the drilled hole. We mark with a marker a place under the groove of the technological opening in the nozzle of the gun. We grind with a file.
Insert the nozzle into the hole. Here's what happens.
We seal the joints and fix them with hot glue. We pour sand into the bottle, connect to the compressor and begin work on cleaning the tool from rust.

Attention! It is necessary to observe safety precautions and have the simplest PPD (personal protective equipment) respirator, gloves, goggles or visor.

An experimental workable sample of a rowan launcher is presented, the pistol shoots rowan berries like a machine gun. There were not enough components to assemble the device, but by a happy coincidence, all the parts were purchased and the rowan launcher was assembled at home. Compressed air is needed to start the device - a household compressor with a receiver became the source of air.

Instructions on how to make a do-it-yourself pneumatic pistol machine gun that shoots rowan berries

1. The body of the air pistol, as always on the site of the Secret of the Master, was taken from waste material. A half liter empty plastic PET bottle fits the body very well.

2. Important detail, because of which the air gun was not going to be - this is the trigger for supplying air to the volume of the bottle. Bought by chance in a store for 100 rubles and called "Small blow gun" (Air blow gun), body material is aluminum. The gun is not equipped with an adapter for a pneumatic hose, I had to pay another 100 rubles for the adapter. Pay attention - the adapter must have a sealing rubber ring!

Blow gun Hose adapter

3. An important detail of a homemade submachine gun is the barrel, the operation of the rowan launcher depends on the barrel. The diameter must match maximum size berry. Unfortunately, it was not possible to choose the optimal barrel due to the limited materials. A metal tube from an awning with a caliber of 11 mm was used, which corresponded to the diameter of only a very small number of berries. In the video, upon closer examination, a high-quality shot is accompanied by a characteristic pop. These indicators are improved when upgrading weapons. If you use airsoft-type ammunition 🙂 and the corresponding barrel, then the effectiveness of the machine gun will increase by an order of magnitude.

4. The barrel is fixed in the cap of the plastic bottle. To fix the trunk must be approached with all care. Leaks in the installation will lead to a drop in pressure in the bottle and reduce the effectiveness of the weapon. The mounting issue is resolved as follows. In three bottle caps, they are drilled with their own hands - holes of a slightly smaller diameter of the barrel are cut with a knife. The first cover is installed on the barrel. The second cover upside down is glued to the first cover with hot glue. The volume of the third cover is filled with sealant or hot melt adhesive and we tighten the package with tape. The barrel mount is hermetically sealed.

First cover installed

5. Installing the blow gun also requires careful work. Remove blower head. We select a washer to increase the contact area. The hole in the bottle is best done by melting the plastic with a very well heated soldering iron. The hole diameter must be equal to the thread diameter of the blower head. Important! The hole should be located at such a distance from the neck that the spanner wrench can reach it. Attempts to drill a hole were successful, but during the operation of the gun, the bottle at the attachment point always began to tear.

6. The installation of the head is carried out using a wire, this is clear from the photo. The wire is passed through the neck and hole and then tightens the head and presses it into place. We throw a key on it and fasten the thermal gun. Look at the photo.

Hole in the bottle Blow head in the hole

7. The point is small - to collect shells on the nearest mountain ash. You need large berries. All berries must be separated and sorted. Preparing ammunition took longer than assembling weapons.

Hit result

8. An air compressor was used as an air source, the maximum possible pressure of 8 atmospheres was supplied to the gun. The test results are shown in the video.

Tests have shown that an effective shot is obtained only with berries that match the caliber of the barrel and the berry flies out at a fairly high speed and breaks against an obstacle. The photo shows the result of hitting glass from a distance of 15 meters. With such shots, the sound is similar to the shot of a paintball gun (the last shot in the video). The directions of modernization and improvement of the submachine gun are clear - this is the selection of the barrel of the optimal diameter. During the tests (three bottles of mountain ash) there was one failure as a result of clogging the trunk with two connected berries, which was eliminated by cleaning the trunk. Follow the safety precautions when repeating. Do not point the gun at people, do not look into the barrel when the hose is connected, stop shooting if the barrel is clogged.

In the practice of performing repair and construction work and mechanical processing of products on machine tools, small technological waste- dust, chips - the presence of which not only interferes with the worker, but also causes a deterioration in the quality of his operations. In such cases, a pneumatic blow gun is indispensable.

Design and principle of operation

The blow gun realizes its main purpose with the help of compressed air flow, which is directed to the object to be cleaned. In particular, with the help of this device, pipes or radiators, as well as external flat or volumetric surfaces, can be cleaned of deposits. With the help of such equipment, additionally equipped with a pressure gauge, it is also possible to inflate tires.

It is clear that such pneumatic devices expand the possibilities of using compressors, so most manufacturers (Metabo, Intertool, Fubag, Matrix, etc.) either equip the device with a quick Euro-connection to the main unit, or (Chinese brand Wester) completes the blow gun with a special compressor adapter.

The considered structure consists of the following parts:

  1. Housing in which there is a fitting for connecting the compressor hose.
  2. A valve that regulates the flow of compressed air.
  3. A trigger to turn on the compressed air supply.
  4. Nozzles (usually with a confuser profile) that reduce pressure and increase flow rate. However, depending on the type of work, the gun can also be equipped with a diffuser-type nozzle.
  5. Set of interchangeable nozzles.

Sometimes such a device is called a blow gun, in which there is no difference: everything is determined by the type of surfaces to be cleaned. External - blown, internal - blown.

With the compressor turned on, the nozzle of the air gun is directed to the required place, and the trigger is pulled. The flow and pressure of compressed air is controlled by a valve.

Device classification

Depending on the primary use and functionality of the tasks assigned, the following types of pneumatic blow guns are distinguished:

  1. According to the body material - metal or composite mineral-ceramics.
  2. According to the limiting pressure passed by the valve and the flow of compressed air.
  3. By functionality: the number and shape of nozzles.
  4. By way of connection to the compressor.

The greatest variety is shown in the shapes and sizes of nozzles for blow guns. Tips can be:

  • with a straight or conical nozzle;
  • with a rigid or flexible spout;
  • with a straight or curved axis;
  • with an outlet round or slotted hole;
  • with regular or extended nozzle.

If it is necessary to blow out in hard-to-reach places, it is advisable to choose a blow gun for the compressor, which comes with an extended nozzle (straight or curved), or a nozzle with a rubber tip. If there is a high-quality air purification filter in the compressor, the durability of such nozzles will be no worse than hard, aluminum ones. In addition, when cleaning thin surfaces or small holes, the aluminum tip may accidentally damage the product being cleaned.

How to choose a blow gun?

During systematic work of this kind, attention is paid to the durability and reliability of the structural elements of the blow gun. Most often, problems begin with prolonged use of equipment in conditions of high humidity and sudden temperature changes (which happens when repairing vehicles). The steel parts of the blow gun oxidize over time, and the dimensions of the nozzle dimensions change (for example, they expand at elevated ambient temperatures). In such cases, it is more expedient to work with blow guns, the main parts of which are made of a mineral-ceramic composite. Such tooling is produced by Licota trademark (Taiwan).

Most blow gun models have comparable parameters in terms of compressed air flow rate (from 100 to 400 l / min), pressure (from 2 to 8 atm), diameter of the connecting hose (6 ... 10 mm), and also in terms of mass (from 0.20 up to 0.40 kg). Therefore, in addition to the basic configuration of the product with interchangeable nozzles, the credibility of the brand and the build quality of the devices come to the fore. And here products from Germany (Fubag, Metabo) have a clear advantage. As for the considered products from the PRC, it wins with its price, but loses in terms of the quality of the metal and the availability of after-sales service.

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