Gas-Tight FDM 3D Printing Is Within Your Grasp
The widespread availability of inexpensive 3D printers has revolutionized home manufacturing. However, these creations often face issues with layer adhesion, which can lead to structural failures and permeability concerns, particularly when waterproof or gas-proof properties are needed. German Engineer has explored these challenges in a new video, focusing on the design and preparation of small propane tanks.
Propane is an attractive fuel because it liquefies easily under compression. A propane cylinder or tank maintains an equilibrium of liquid propane with pressurized gas above it, with pressure depending on the ambient temperature. Consequently, any propane tank must handle a working pressure between 150 and 200 PSI, and the design pressure must be much higher for safety.
Initial Test and Solution
In his tests, filling a 3D printed tank results in immediate propane escape, as demonstrated by submerging the print in water. To address this, [German Engineer] uses Diamant Dichtol, a sealant that polymerizes in the gaps between layers, creating a gas-tight tank.
Testing Different Tank Thicknesses
He tests tanks of different thicknesses:
- 1 mm thick tank: Bursts under pressure.
- Thicker tanks: Survive without bursting.
The tests show that using a sealant can successfully create gas-tight prints. The attraction of a small and lightweight fuel tank is evident, but the safety concerns remain significant.
Even with the material being lightweight 3D print, high-pressure equipment should be approached with caution. Tanks can burst, and when they do, they can cause severe injuries. The technique of using sealants to make 3D prints gas-tight is promising, but high-pressure applications should be handled with extreme care.
The exploration by German Engineer demonstrates a viable method for improving the impermeability of 3D printed objects, particularly for applications requiring gas-tight properties. While the technique holds potential, especially for lightweight and small-scale fuel tanks, safety considerations are paramount. It’s advisable to use this method with caution and avoid subjecting 3D printed tanks to high pressures to prevent accidents.
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