A started cylinder of polyurethane foam dries up in a couple of months. It is impossible to squeeze polyurethane out of it, even after cleaning the tube. At the same time, a lot of liquid foam can still remain at the bottom. To extract it, you can make a simple device.
- Plexiglas 40-50 mm;
- bolt М8;
- M8 nuts – 2 pcs.;
- worm clamps 70-90 mm – 2 pcs.;
- old bicycle camera;
Fixture manufacturing process
It is necessary to cut out a workpiece 40×40 mm from thick plexiglass.
It is drilled through the center and an M8 thread is cut into it.
Next, you need to drill a perpendicular hole, connecting it to the previous threaded one.
Then the part is clamped in a vice. It is necessary to form a concave rounding of its edge with a 60 mm crown. It is made on either side with a threaded hole.
Now you need to sharpen the long M6 bolt so that it can pierce the foam cylinder.
After that, the plexiglass blank must be drilled through 2 more times to insert the clamps. The holes are made parallel to the adjacent thread. In this case, they must go to the side to the left and right.
A valve from a chamber without a spool is screwed into the adjacent hole on the fumlent or thread.
After sealing in the same way, you need to tighten the pointed bolt. For convenience, the free edge of the fumlent can be clamped between two nuts on it.
Clamps are passed through the remaining holes.
Then a rubber gasket is glued to the concave side. You can use a rubber bandage or cut it from an old bicycle tube. A hole is made in the gasket opposite the tip of the bolt.
To use the device, you need to fasten it with clamps at the bottom of the cylinder.
Then a short tube is pulled onto the fitting from the valve.
It remains to tighten the bolt to pierce the cylinder, and unscrew it a little back.
As a result, the remaining foam will come out through the straw.
The device is rinsed after use.
Watch the video