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Sep 15, 2022
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How to make washing a gun with polyurethane foam many times cheaper?

When a gun with a wound cylinder, in which there is still unused mounting foam, is simply put aside, then even after a short time the foam inside the gun will dry out and it will be difficult to use it again.

To prevent such a trouble from happening and the gun could be used after any even quite a long time, it is necessary after the end of work to just tighten the foam output regulator located above the handle from above on its outer side.

How to make washing a gun with polyurethane foam many times cheaper

But still, if the mounting foam inside the gun has dried up, then you will have to rinse it with an expensive spray can with a special OPPA type flushing liquid. It costs quite a lot. What to do if such a liquid is over in the can, and it is far to run to the store or is it already closed?

Making a reusable flush bottle

Let’s use an empty spray can and turn it into a reusable one. This will save significant money.

But for this, first, by pressing the valve button, we release the residual air that is still in the can for safety purposes.

Next, in the center of the bottom, we drill a hole with a diameter of 5 mm, where we will insert a suitably prepared bronze nipple from an automobile chamber or a tire with a short spool.

How to make washing a gun with polyurethane foam many times cheaper

We cut off the thickened rubber part from the nipple, and burn the rubber surfacing on the remaining part of the nipple in the flame of a gas burner.

How to make washing a gun with polyurethane foam many times cheaper

How to make washing a gun with polyurethane foam many times cheaper
How to make washing a gun with polyurethane foam many times cheaper

We clean the bottom of the can around the previously drilled hole with an emery cloth, etch the metal with soldering acid and service it near the hole. We repeat the same with the seat of the shortened nipple.

How to make washing a gun with polyurethane foam many times cheaper

We insert the nipple into the hole and seal it around, be sure to ensure both mechanical strength and hydro-gas tightness.

How to make washing a gun with polyurethane foam many times cheaper

Through the nipple into the balloon using a medical syringe, fill in solvent 646 with about 100 ml and screw in the nipple.

How to make washing a gun with polyurethane foam many times cheaper

We also supply air through the nipple into the balloon using a compressor or even a manual bicycle pump. For our case, 4 atmospheres is enough.

How to make washing a gun with polyurethane foam many times cheaper

We install a solvent bottle instead of a container with mounting foam, unscrew the foam output regulator and pull the trigger. Dissolved foam intensively begins to stand out from the nozzle of the gun. We continue flushing until only a colorless solvent comes out of the nozzle.

How to make washing a gun with polyurethane foam many times cheaper

Instead of solvent 646, you can also use white spirit or acetone under pressure up to 6 atmospheres to clean the gun from dried mounting foam with the same success.

How to make washing a gun with polyurethane foam many times cheaper

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