Materials:
- plastic bottle;
- Food stretch film;
- fan;
- corrugated cardboard.
Manufacturing process of corrugated hoses and hoods
You need to inflate a PET bottle and heat it over a gas stove so that it straightens, more details here - https://enn.washerhouse.com/6732-kak-vyprjamljat-ljubye-figurnye-pjet-butylki.html
After this, using a bottle cutter, you need to dissolve it into a tape 8 mm wide.
The edge of the tape is twisted into a spiral and heated over the stove. Then it is twisted and stretched further. The resulting spiral is immediately removed outside the heating zone so that the plastic does not soften excessively.The result should be a tube twisted turn to turn without gaps or overlaps. So it will be quite elastic.
The resulting tube must be inspected along its entire length. Any gaps or overlaps found on the coils must be cut out. The cut edges are glued together with hot glue.
Next, a template for the corrugated pipe is drawn. A 110 mm sewer pipe is ideal for this. A paper tape 3 cm wide is wound on it. A gap of 2 mm is made between its turns, and it is outlined with a marker.
A tube from a bottle is wound onto a sewer pipe. It should be secured with glue on one edge. Then she pours boiling water over it so that the tube takes shape.
After this, the tube is wound obliquely along the marker. At the beginning of winding, 2 straight turns are made. They need to be glued in two places. The last turn is also glued.
The tube will serve as a frame for the corrugation. Next you need to wrap stretch film around the sewer pipe. The first turn is done without tension, then 3 with the film stretched by 5-10%. It should be wrapped evenly. Then the wound part is pulled together, 3 turns are left on the pipe and everything is repeated again with an overlap on them. This way you can make a corrugation of any length, at least 10 m.
Cardboard overlays with holes are sewn to the corrugated pipe along the edges. It's best to glue them together using a couple layers of cardboard to keep them rigid. Then a fan is installed at one end of the sleeve.
A hood dome is made from a cardboard box and attached to the second edge of the corrugated pipe. Now, when the fan is turned on, air with fumes and smoke will be sucked in and removed from the work area to the outside.
