How to make a spray gun at home?

For DIY enthusiasts and hobbyists, building a spray gun at home can be a satisfying project. A homemade spray gun can be used for painting furniture, cars, or other projects, and it can be customized to meet your specific needs while saving you money. You will be guided through the necessary steps and materials to construct your own spray gun from the ground up with the help of this guide.

It’s critical to comprehend the fundamental parts and workings of a spray gun before beginning. Essentially, a spray gun applies paint to a surface by atomizing and propelling it with air pressure, which results in an even and smooth layer. The paint container, air compressor, nozzle, and trigger mechanism are important components. With a few common supplies and tools, you can put these components together to create a working spray gun.

We’ll start by enumerating the supplies you’ll require, which include a small air compressor, metal tubing, plastic bottles, and pliers and a drill. There will be clear instructions and helpful hints for each step to help you avoid common pitfalls. In order to guarantee that you work safely and effectively throughout the process, safety precautions will also be highlighted.

After assembly, we’ll go over how to test your spray gun to make sure it functions properly and how to adjust it for best results. Regardless of your level of experience, this guide is meant to make the process simple and pleasurable. By the time you’re done, you’ll have a homemade spray gun that you can use to paint projects with expertise.

Materials Needed Instructions
Empty plastic bottle, small air compressor, rubber hose, spray nozzle, tape, scissors, drill, hot glue gun 1. Drill a hole in the bottle cap. 2. Insert the spray nozzle and seal with hot glue. 3. Connect the hose to the compressor and nozzle. 4. Tape the bottle securely to the compressor. 5. Adjust the compressor pressure for desired spray. 6. Fill the bottle with paint and start spraying!

Building your own spray gun at home lets you tailor your equipment for different painting jobs, which can be an enjoyable and satisfying do-it-yourself project. You can make an efficient and reusable spray gun with a few common household items like a plastic bottle, a tube, and a spray nozzle. Not only is this DIY tool inexpensive, but it’s also simple to put together and ideal for little painting jobs. Build your own spray gun with these easy steps to experience a new level of convenience and control over your painting projects.

Sprayer from aerosol spray

One of the most basic kinds of homemade paint sprayers for water-based paint is a manual spray gun from an aerosol can, which is very simple to make from improvised materials. You will need the following ready for work: a bicycle pump, an aerosol can (like one made from an old deodorant can), a bicycle chamber, and a plastic bottle.

The tasks are completed in the following sequence:

  • From a bicycle chamber, cut a nipple with a lid with a diameter of 3 cm;
  • make a hole in the bottle;
  • glue the nipple to the inner wall of the bottle, which will perform the function of pumping the air mass;
  • Knock with a hacksaw on the metal from the spray can be a spraying module with a valve (the spray can be selected so that its size coincides with the plug diameter from a plastic bottle);
  • Attach the valve to the cork with cold welding, while it is important to create an absolutely tight connection, since the design will function under pressure;
  • test the device under pressure no higher than 3 atmospheres.

The homemade spray spacecraft operates on the same principles as an airless sprayer and precisely stains the surface when applying a water-based paint or lime wash.

Knight from the vacuum cleaner

It will be difficult to use a homemade sprayer by hand in a large room if the walls or ceiling are to be painted. In this scenario, you could try building an automated air supply device. You’ll need an old vacuum cleaner or a refrigerator compressor to accomplish this. While they work well with water-based compositions, refrigerator or vacuum cleaner compressor units are not appropriate for use with powder paint.

An advantage of old Soviet vacuum cleaners over newer models is that their design allowed the hose to be connected to both the weekend and the input pipe, allowing them to operate in both "blowing" and "blossom" modes. Models available on the market today lack these kinds of opportunities.

The direction of traction in the vacuum cleaner can be altered if its use is no longer anticipated. In certain situations, this can be achieved by simply switching the terminals that connect the rotor and stator. Following that, a few tasks must be completed in order to fully utilize the outdated device as an electric paint sprayer:

  1. Pick a bottle of plastic or glass with a wide neck (with a diameter of at least 5 cm and up to 2 liters with a volume).
  2. Cut the plug from the foam, which is suitable in size under the neck of the bottle. The cork should have a rectangular ledge, which is allowed to insert the tube from a ballpoint or dropper into the hole at right angles.
  3. Make holes and insert the tubes, one of which will ensure the flow of paint, and the second will supply compressed air.
  4. Make another auxiliary hole through which air will pass into the bottle, and when the paint is reduced in a tightly closed vessel, a vacuum will occur.
  5. Cut another foam plug, which will combine a sprayer and a vacuum cleaner hose into a single system.

Refrigerator for the manufacture of a spray gun

When using the vacuum cleaner, the electric spray gun that is constructed from the refrigerator’s compressor runs much quieter and saves a lot of money when staining with water-based paint and lime wash. However, creating such a device is far more challenging.

  1. As a receiver, take an old fire extinguisher, a cylinder, a canister or another tightly closed container.
  2. Remove the compressor and starting relay, for this, copper tubes are snacked or sawn off with a hacksaw.
  3. Enable power to determine which of the tubes supplies air under pressure.
  4. On the tube that sucks the air, using a sealant or hose, attach a car gasoline filter that protects the structure from dust hit.
  5. Combine the air for pumping air with two gasoline hoses with the receiver. For this, fittings fixed by sealant are used.
  6. On the outlet of the receiver, install a diesel filter, which can be purchased at a car spare parts store. The filter eliminates the excessive moisture of the incoming air and improves the quality of the operation of the spray gun.
  7. Fix the compressor and receiver on a dense base, for example, on the board. After that, you can turn on the sprayer and start the process of painting.

Counseling! The device won’t start if the compressor isn’t installed in the same location as it was in the refrigerator. Additionally, it is occasionally required to replace the oil in the Kraskopult from the compressor. The third tube, which fits inside the case, is meant for this.

The produced spray gun works just as well for whitewashing with lime and painting with water-based paint.

Holder for a spray gun

A piece of common plywood, about one centimeter thick, can be used to make a basic spool holder with your hands. This is essential:

  • cut a square 25 x 25 cm in size from a sheet of plywood, in which cut a round hole with a jigsaw, corresponding to the corresponding gas tank of the spray gun;
  • insert the handle of the pistol into the groove, crushed from the edge of the plywood board to the hole;
  • install a stand on the legs of wooden bars, the height of which should be selected in such a way that there is a space for placing a hose below;
  • For such a stand, you can additionally make a holder for a filter funnel, for this an aluminum wire is used, which with screws are attached to the faner.

Sprayer from a ballpoint pen

An easy-to-use DIY spray gun that uses a refrigerator or vacuum cleaner’s compressor requires some knowledge to operate, but anyone can use a mini-spray that can be made with a ballpoint pen. This hand tool uses a tiny cylinder that holds up to one liter, making it perfect for little finishing tasks like water-based paint staining.

To produce such a spray, the following steps must be taken:

  • disassemble the handle and remove the paste out of it so that the result is an empty tube through which the air will pass unhindered;
  • cut the tip of the lower part of the handle to get an expanded hole;
  • disassemble the rod, remove the remaining pasta from it with alcohol;
  • In the center of the cork, make a through hole of the same size as the rod;
  • perpendicular to the hole for the rod of the cork, a hole for the handle housing is drilled;
  • paste the rod and body into the bottle, after which you can proceed to staining. The air will have to inhale into such an apparatus independently, so for complex coloring with powder paint, this method is not suitable.

Production of a spray gun for powder paint

Building a sprayer for powder paint is a challenging project requiring expert knowledge and abilities in the field of electricity. Common technology used in the production of a spray gun consists of the following tasks:

  1. Collect an electric module. For this, the core is formed from a piece of plastic tap pipe and wire wound on it with a ferrite element. This module is placed in a plastic vessel and filled with paraffin.
  2. Collect a gun. An electric core is mounted in a plastic tee, while it should enter it very tightly. The walls from the inside must be treated with glue in order to ensure the stability of the mechanism. All electrical wires are excreted through the lower holes, which are sealed with paraffin, and the bare core is covered with a casing.
  3. Combine the structure with a paint tank. The hole is drilled on the tee where the tank is inserted, while the paint is regulated by a rubber trigger.
  4. Dilute the bred wires and close the power supply, after which you can start testing and filling out the device with powder paint.

Making your own spray gun at home is a fun project that can help you save money and have a unique tool for painting. With readily available materials and a basic understanding of how they work together, you can assemble a working spray gun. This do-it-yourself method improves your abilities and gives you a sense of success.

Choosing the appropriate materials is one of the crucial steps. You can construct an effective spray gun with common household items like straws, plastic bottles, and small air compressors. For the spray mechanism to operate smoothly and the parts to fit together properly, careful assembly is required. To ensure consistent spray patterns and prevent leaks, take your time during this process.

Before beginning any significant painting project, make sure your homemade spray gun is functioning properly. Start with a light mist of water or diluted paint to assess the spray quality and make any required corrections. This will assist you in comprehending the operation of your spray gun and locating any problems that require repair. After you’re happy with the outcome, you can confidently use your spray gun to paint a variety of surfaces.

Not only is building a spray gun at home an affordable solution, but it’s also a fantastic learning opportunity. It enables you to better understand how spray guns operate and customize the tool to your own needs. You can build a dependable and effective spray gun that will help you with your painting projects if you are patient and meticulous in your execution.

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Maria Vlasova

Chemist-technologist, expert on paint and varnish materials. I will help you figure out the compositions of paints, their characteristics and choose the best option for your purposes.

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