Each instrument needs constant care by its owner. Otherwise, a useful thing in the household can lose its effectiveness and eventually even break. Especially when it comes to such a relatively "tricky" device as a gun for polyurethane foam. The necessary device from the arsenal of the master requires eye and eye and appropriate care. Let's figure it out with cleaning the nozzle.
Sooner or later, the foam in the gun nozzle dries up. True, the design of this tool is designed to prevent oxygen from entering the mixture. Perhaps this is due to the fact that a small amount of the working mixture always remains in the tip. In an amicable way, immediately after the completion of the work, the ball should be removed and immediately close the main trigger, which is responsible for the tightness of the cylinder. Of course, there is not always enough time, effort and memory for this during work. Dried foam will interfere with further gun use.
1. Cleaning with a nail
You can clean dried foam with a nail, hammer and nippers. To do this, the nail is hammered into a stable surface (for example, into a piece of wood), after which the cap is removed from it using nippers. Then you need to insert a nail into the nozzle and press the trigger of the gun. A few seconds and it will be ready to go again. You will have to, however, sacrifice a little foam.
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2. Dimexidum cleaning
This method is used in situations where the pistol is thoroughly dirty. In order to carry out cleaning, it is necessary to point the nozzle down. Fill the service valve with Dimexide and wait 1-2 minutes. Pull the trigger and check if it works. If the foam does not go, then you need to find a small ball at the base of the balloon and apply Dimexide on it, wait a minute and try again.
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3. Complete disassembly
In situations where the first two methods do not help, you will have to disassemble the gun and carry out its mechanical cleaning. After disassembly, all parts of the tool should be folded into a container and filled with the composition already mentioned above for a few minutes. If it comes to disassembly, then you should remove all the foam that catches your eye. It should also be borne in mind that after this, the pistol will no longer work as before and the pressure (most likely) will become noticeably lower.
If you want to know something else useful, then you should read about how to make a drill bit for drilling hardened steel using a bearing and only him.
Source: https://novate.ru/blogs/010120/52934/
