How to make a spray gun with your own hands out of a vacuum

How to make a spray gun with your own hands from a vacuum cleaner? The paint gun, usually called the spray gun, is considered to be an indispensable tool for repairs. More precisely when painting, painting work. This is especially true not just of painting the walls or the floor, but of applying acrylic or metallic on the surface of paints and varnishes. In addition, it is difficult to imagine, for example, painting a car without a paint sprayer.

Using the spray gun to paint the walls

During molar work it is necessary to use personal protective equipment: goggles and a mask.

In hardware stores, the cost of such equipment starts from amounts slightly below 2 thousand rubles. Its acquisition can be justified for those who are engaged in painting professionally. If, however, it is not necessary to paint the surface evenly and economically, it is quite possible to make an airbrush out of available tools.

In addition, some believe that if you do the spray gun with your own hands, the spray gun, made "by itself", in many cases more efficient commercial models. But this is in the case when the problem of saving paint material is not too acute.

The position of the vacuum cleaner spray when painting

The position of the vacuum cleaner spray when painting: a - walls, b - ceiling.

But you should immediately make a reservation that completely 100% replace the professional equipment "homemade" can not. Especially in the case of the car. This is due to the low pressure in the handicraft-assembled device.

A sufficiently high-quality result can be achieved only if the painter himself clearly understands the principles of work, and the paint is sufficiently diluted. “Enough” means that the required number of experiments has been carried out and it is clear what result can be expected at best.

All factory sprayers can be divided into:

  • professional and semi-professional,
  • manual and automatic;
  • with upper and lower cistern;
  • forced feed and airless;
  • high and low pressure.

The low-pressure spray gun is most similar in its qualities to a homemade one, since it cannot provide a high-pressure cleaner. In addition, commercially available spray guns for use with a vacuum cleaner are on sale.

Spray Gun for Vacuum Cleaner

Spray gun device with vacuum cleaner

The device airbrush with a vacuum cleaner.

Intertool PT-0303 kraskoraspylitel is equipped with the upper tank, so the liquid gets on the spray head under its own weight. After that, it is pushed out by a stream of air supplied by a third-party source - a vacuum cleaner (or another compressor). The volume of the tank is 200 ml, the diameter of the nozzle is 0.5 mm. Working pressure can vary from 3.5 to 5 bar with air flow up to 130 liters per minute. Such data leads the manufacturer.

The nozzle in the form of a lid on a standard jar is put on a regular container with a capacity from 0.5 to 1 liter. The inlet on the lid is designed for a 30 mm hose, so if the diameter does not match, then an adapter should be used. Such a device is very cheap and the best spray at home. It is used mainly for water-soluble paints and lime mortar for whitewashing.

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How to make a spray gun?

Spray Device

Spray device.

There are various options, including a compressor or a pump (an assistant is required to work with the pump). One of the once popular ways to assemble a homemade spray gun is to use a vacuum cleaner for this. “Once” - because sufficiently powerful cravings could be generated by outdated models of vacuum cleaners manufactured in the USSR. And they could work both on “blowing” and on “blowing”. Modern household appliances do not have such power.

If there is a vacuum cleaner that will no longer be used for its intended purpose, you can try to change the direction of thrust. Sometimes, to make its engine rotate in the opposite direction (this will change the direction of air flow), it is enough to reverse the polarity of the terminals going to the stator and rotor.

But even this can not provide sufficient strength. If the impeller blades are asymmetrical, then the return thrust will be much weaker than the standard.

The correct position of the spray gun when painting the surface

The correct position of the spray gun when painting the surface.

That is, in order to adapt the vacuum cleaner engine under the spray gun, two important points will have to be taken into account: the possibility of starting it in the opposite direction and the design of the impeller blades. In the second case, the impeller can be replaced by a more suitable one.

In any case, if the decision is made to use a vacuum cleaner, it is important to provide constant pressure, for this purpose the receiver is used.

This can be a regular camera from a car wheel or a soccer ball. The principle of operation of a hand-made sprayer is the same as that of a conventional one: the painting material will be sprayed from the tank, where it is located, through the burner.

Accordingly, the pressure of the required force must be supplied to the container. An important condition is the presence in the design of a pressure reducing valve. He will be responsible for the throughput of the spray gun.

That is, to make a spray gun with your own hands, you will need:

Airbrush from the gel pen and syringe

Airbrush from the gel pen and syringe.

  • pressure source (vacuum cleaner with hose);
  • paint container (enamel, acrylic, etc.);
  • receiver;
  • pressure reducing valve;
  • fixing materials.

The fastener is important because the structures need to ensure maximum tightness of the joints of the vacuum cleaner hose, can or paint tank that removes the paint of the burner, that is, all parts of the homemade spray gun.

It can be added that already at the design and assembly stage it is possible to envisage the possibility of using different burners with different nozzle widths. This will increase the range of application options for the tool.

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Preparation for work

In addition to the usual surface preparation (it must be clean and dry), it is also necessary to prepare the tool itself. To begin with, it is necessary to remove all parts of the vacuum cleaner that contain and accumulate dust, especially filters. All other parts must be thoroughly washed and minimized to dust before assembly. It is hardly possible to avoid it completely, but there are ways to reduce its quantity to the minimum possible:

The principle of using the spray gun

The principle of using the spray gun.

  1. Wrap the hose with adhesive tape so that the outside is not accessible to dust.
  2. Scotch tape (tape) or wet rags can be placed at the air intake.
  3. Build a homemade filter on the nipple from old stockings, several layers of medical bandage or ordinary gauze.
  4. Ensure cleanliness of the room and its minimum dustiness.

Then you need to pour into the container from 100 to 150 g of solvent to clean the device. The vacuum cleaner must be turned on for at least 10 minutes.

Simultaneously with the spraying of pure solvent, it is necessary to adjust the nozzle and the pressure supplied to the structure. Spray guns should not spit paint, spraying it unevenly.

Tests are conducted at different distances from the surfaces, preferably with different nozzle diameters. On average, it is from 15 to 20 cm between the sprayer and the surface. In this case, the test will be more effective with a minimum nozzle size.

In order to properly make a spray gun and not encounter surprises, after assembling it, it is best to experience water-based paint, only to do it better on the street.

Still, the device is assembled without calculations, so various force majeure in the form of an unexpected release of paint through an unnecessary hole is possible.

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The nuances of working with a spray gun from a vacuum cleaner

Scheme of the device spray with adjustments

Diagram of the device spray with adjustments.

If the answer to the question of how to make a spray gun is found, it remains to learn how to work with it. In the case of painting a car, both layers of paint, developing and main, are first applied to those areas of the car where poor-quality painting is least noticeable: the ends of the boxes, sills, doorways. Then you can begin to spray enamel on the edges of parts, along the borders of masking tape and film. This will avoid the drips of paint: they fall on the film or tape. In general, this will improve the quality of painting and allow you to adjust the method of spraying and the thickness of the paint.

If there were no particular problems with the edges of the surfaces, you can start working with the main areas. At the same time it is better to make movements fast and horizontal, constantly monitoring the trickles of paint.

The scheme of use of the spray gun

The scheme of use of the spray gun.

The greater the number of layers and the thinner they are, the better the result. For best results, painting with at least three layers, including a developing one, is recommended. Drying the surface between layers can be long. For example, after the developing layer, the drying time can be up to half an hour and more - during this time the solvent must finish the active evaporation phase.

The high consumption of enamel when using a homemade paint sprayer is associated not only with low pressure, but also with the polishing of the car that is inevitable after painting. This is especially true of varnish, since the multiple defects that are inevitable when working with such a tool will have to be corrected with pastes and fine-grained abrasive mixtures. So saving on materials with this approach will not work.

How else to apply a homemade spray gun:

  1. Spray decorative materials (imitation wood and stone) on walls and other surfaces.
  2. Watering large or located in remote places (at high altitude) houseplants.
  3. Repair (painting) of furniture.

In any case, the main thing is the experience of working with such a tool as an airbrush. And to the factory, and to the homemade model, you must first get used to, pick up the consistency of paint material corresponding to the task. And in the case of a spray from a vacuum cleaner - also to work on the pressure and tightness of the whole structure.

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