Powder coating gun

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Powder coating gun with venturi and tribo effect. The tribo process works with friction, just like rubbing your hair with a balloon. The Tribo gun has a friction system through which powder is fed and positively charged by the gun. Optionally, the workpiece can be grounded so that the powder adheres even more strongly, but this is only really necessary for complex components with many corners and surfaces that are difficult to access. The powder is sucked in from above using a Coke or PET bottle via the Venturi effect and atomized through a zigzag surface coated with Teflon tape. This charges it and it adheres to the ideally sandblasted or cleaned metal part. Then bake everything in a commercially available small or large oven at 180-200 degrees for 20 minutes, depending on the powder. Make sure the room is ventilated or fresh air is supplied, as it stinks and probably produces toxic gases. You can get the powder from Amazon or Ebay in all colors and types. Never made a mistake so far. Here is an example (affiliate link): https://amzn.to/3qZzI7r The Teflon plate is also best ordered here (affiliate link): https://amzn.to/46cVq81 The Teflon plate must then be cut into a 15-16 mm wide strip with a sharp knife. This strip is then inserted into the Teflontube_small and Teflontube_long components and the protruding part cut off. The compressed air should be adjusted so that the outflowing air is not too strong and blows away the powder that has already adhered to the workpiece. For the sake of the environment and to protect your health, we recommend an exhaust air device or a respirator mask for fine dust. Update: 16.10.2023: Two files have been added, one Teflontube_long4mm.stl and one screw cap4mm.stl. These are identical parts with a slightly larger air passage, which may work better than the original with 2mm hole, depending on the powder and compressed air settings. Update: 08.01.2024: I get a lot of requests about grounding the parts or the gun. As mentioned above, this is not necessary in most cases. If you still want to ground your parts / gun, you have to attach a cable to the metal of the gun (a small threaded hole and a screw that holds the cable would be possible, or a large washer to which you solder a cable and put it on the front of the screw-on thread so that it touches the metal of the gun when you screw on the attachment). The same cable must then go to the component to be coated and be attached there with an alligator clip, for example, and finally be inserted into the ground with an earth hook or plugged into a socket with a printed plug with a metal pin on the earthing lead.