DIY powder paint + staining technique
Most likely, you thought about how long and paint some metal product with high quality, so that you do not have to update it next year. At the moment there is an opportunity, and we are talking about do-it-yourself powder paint. Although the process is quite complicated, sometimes laborious, it is quite real, which we will talk about in this article.
Powder paint - what is it? By itself, the powder will represent a stable polymer that will be applied to the product dry, as well as under the influence of an electrical positive charge.
It turns out that when spraying, the paint will be charged with positive particles, and the product to be painted will have a negative charge, which causes the coating to magnetize on the surface, as well as its adhesion.
Such application technology will require special equipment, and also, paint magnetization is not the only technological feature. After applying the paint and varnish composition, the stage of polymerization occurs, or rather warming up to a certain temperature.
At the same time, the temperature and duration of baking products in the oven are always different, which means that depending on which of the layers the coating should be polymerized, set the heating level and time. It is quite difficult to do everything manually, which means that the place for automation comes. Based on the above, it may seem that powder-type staining at home is impossible, but this is not the case.
Naturally, you will need to spend money on any equipment, because you cannot do without it, then it is worth considering the cost of paint in special companies, all costs will have time to pay off after a couple of months. But this is only relevant for commercial purposes, because if necessary, you can paint a product one-time, it is easier to ask for help from specialists than to arrange your own painting work.
On the jelly itself, this section of the article could easily take several pages, because powder-type paints are simply not competitors in terms of durability, and quality. But in order not to tire the reader by listing all the obvious qualities, we suggest paying attention only to the most basic and characteristic features,
that only such material has:
Good advice! Even if you have experience working with liquid paints, before you start painting with powder, it is better to practice something in advance, since here not only the application process will differ, but a certain specificity will appear that should be taken into account when working.
The rims from the car, which are painted in different colors with powder-type polymers, look unusual.
Unfortunately, in this world nothing is perfect, even powder paints have certain drawbacks, but against the background of all the described advantages, they pale.
And yet, getting down to work, it is worth knowing and taking into account them.
Please note that powder-type paint, which contains a wide variety of chemical components, can cause significant harm to health, and therefore, when working with it, personal protective equipment must not be neglected.
The main difficulty when working with powder paints type will be, as already mentioned earlier, the need to purchase special equipment, and if, for example, polymerization chambers can be made independently, then you will need to buy a sandblast or a gun, but we will consider everything in order.
Since surface preparation requires enough attention, even more than paint, you definitely cannot do without a sandblasting installation. You can use different abrasives, but they may not give the desired result, especially if the product has complex shapes and configurations. Naturally, there is no need to buy complex equipment for industrial work, and it will be enough to buy a pistol with low recoil, which is a way to pick up sand from an ordinary bucket.
Please note that for sandblasting devices, special sand is used, fine-grained, which is cleaned of impurities, and if it is not possible to buy such an abrasive, then you should take simple river fine sand, and then carefully sift it through a sieve.
Sandblasting machines have a principle of operation, which consists in the fact that fine abrasive will be supplied under high pressure through a pistol nozzle that looks like a spray gun.
The main advantage is the ability to handle hard-to-reach places where it is difficult to reach with steel tools. So, thanks to such a device, you will be able to paint disks with powder paint with your own hands. In addition, sandblasting helps not only to remove dirt from the surface, but also to select them from the microscopic pores that are in the metal. After processing work, the product will receive a characteristic metallic luster, and therefore the paint should lie down without drips, evenly.
As already mentioned, a standard spray gun that works with liquid paints will not work here, because in addition to the spraying function, the powder must be charged with electricity.
For special spray guns, in addition to the increased pressure, an electric wire will fit the nozzle. The second wire, which experts call a mass, should be connected to the product, and at the moment when the paint starts to come into contact with the metal, a microscopic closure will occur, and the powder will penetrate into the structure.In the photo you will see a spray gun specially for powder paint from one popular brand, and such equipment is professional, so it makes no sense to buy it for one-time or rare works, but if you are planning a private business, then it is better to spend it once and not know problems for many years old.
Such a chamber is a must. For the independent manufacture of the camera, you will need certain knowledge in electrical engineering, as well as the ability to correctly calculate the number and power of heating elements for heating, which should quickly gain the temperature inside to +200 degrees, and then keep it for a certain period of time.
To assemble the camera yourself, you will need:
We will not dwell on the manufacture of the polymerization chamber in detail, so we will just leave a training video where everything is shown in detail.
Before you start painting at home with powder paint, you should figure out which layers of paint and at what temperature should be baked in the oven, because this is what will guarantee quality coverage. Let's consider one table for clarity.
|Temperature inside the oven, Celsius|| |
|Primer||+140 to +150 degrees||15 to 20 minutes|
|Paint layer||+160 to +180 degrees||20 to 30 minutes|
|Lacquer composition||+200 degrees||Approximately 40 minutes|
indicators that may depend on the manufacturer, but on the packaging, such data are usually indicated on the packaging, and therefore do not neglect them. Another important condition for high-quality staining will be the presence of a clean, almost sterile room. In large factories, a special chamber is used for this, in which, in addition to ideal tightness, forced ventilation with traps for excess paint is installed.By the way, if the paint gets into the filtration system, it can be reused, which greatly reduces material consumption and makes the process cheaper.
Please note that the instruction on labor protection when painting with powder paint obliges all workers to use personal protective equipment, especially when it comes to a sealed chamber, where, despite ventilation, there is a persistent aroma of polymer dyes .
Naturally, at home, the construction of such a camera is impractical, so it will be enough to maintain order and cleanliness at the staining site.
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