Heat shrink joining square and round tubing.
Previously:
HDPE pipe fusion machine - photo and video
Friction welding drill pipe for oil exploration
Pipe friction welding - GIF
Polyurethane friction welder - GIF
Heat shrink joining square and round tubing.
Previously:
HDPE pipe fusion machine - photo and video
Friction welding drill pipe for oil exploration
Pipe friction welding - GIF
Polyurethane friction welder - GIF
New plans added on 11/20: Click here for 2,589 plans for homemade tools.
carloski (Jul 26, 2022), durrelltn (Mar 13, 2022), elk-a-holic (Mar 9, 2022), flyfr8rs (Mar 13, 2022), johncg (Mar 9, 2022), mdhatter3 (Mar 8, 2022), Ralphxyz (Mar 9, 2022), Scotsman Hosie (Jul 3, 2022), Sleykin (Jun 28, 2022)
baja (Mar 13, 2022), cognitdiss (Apr 29, 2024), elk-a-holic (Mar 9, 2022), mdhatter3 (Mar 8, 2022), Moby Duck (Mar 12, 2022)
aircraft modellers do a similar trick where they make up a small wooden form of a cockpit window, then shrink the PET bottle over the top to make the "cockpit glass", and then cut out the bottom to release the wooden form.
I've done similar to make ogive transitions for model rocketry.
The only constraint you have is that the PET won't easily shrink to less than the original "cast" diameter. PET bottles are made from blanks which are approximately the diameter of the neck where the lid screws on, so it's difficult for them to shrink less than that.
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