5

A few thoughts that might help... Material: ABS can be vapor smoothed with Acetone which results in the layers sort of "melting" together to form a smoother, and less porous surface. Other plastics can be smoothed with compatible solvents, but I've not tried solvent smoothing with anything other than ABS. Be careful if you try. Print Method: Consider ...


5

I've found that a double-walled base seems to give better results than trying to make the base very thick. Any imperfections in the print, or cracking caused by removing the print can lead to leaks - but if there is layer/infill/layer, the result seems to turn out better for me. Vase mode can be effective (although won't be easy to combine with the above ...


4

When designing the object, you should make sure your object is completely enclosed (obviously). When printing, try increasing the print temperature so that the layers stick to each other well. The most important thing is the print temperature, because if the layers don't adhere to each other well, you will get a leak. The wall thickness of the object can be ...


3

I'm currently working on a project where a kind of box has to stay underwater, and until now, the best hermetic system I found is using coatings. The best of them until now is PVC glue that I use on ABS as a coating with a little trowel. What I find nice is that's quick and that looks smoother and resistant. A disadvantage is that you need some practice to ...


3

I have very little experience printing waterproof stuff. I printed a flower pot in ABS some time ago. Right after print it was leaking water. Then I processed the pot with acetone vapour to create a layer of melted ABS on the surface of the pot and then it became water-proof. As another option for non-solvable in acetone materials like PLA I would rub in ...


3

Filament that absorbs water prior to printing is subject to boiling temperatures as it passes through the heater block. In extreme cases, steam will be visible and a spitting sound will be heard. The filament will expand as the water exits, causing multiple structural and printing problems. Once printed, dry filament may absorb water from the atmosphere, but ...


2

There are already some questions about the choice of filaments for outdoor use: Which is more durable to sunlight/weather - PLA, ABS or PETG 3d printing for outdoor use: what types of filament are most weather resistant? PLA use outdoors? It may very well be that if you print in PETG you won't need any postprocessing. If you still want to, you could try to ...


2

Let's distinguish first three things: Hygroscopic behavior. The ability of a substance to absorb water. Salt is very Hygroscopic. Watertight open-shell. A boat is watertight against water from below. But you can pour water into it. Putting a lid on seals such a body somewhat, but the gap allows water to seep in. Watertight closed-shell. A sphere is water ...


1

The properties of the maternal are not what changes after you print. It is how you use the material. PLA and ABS prints aren't usually subject to +100 °C after printing. When PLA absorbs moisture it becomes brittle. PLA filament will break when trying to print. Your PLA print may be thick enough so that brittle doesn't cause a problem. However, this can ...


1

"Completely" is always relative, but for water at the pressures involved it's probably achievable. Normally you need some sort of gasket (material that can bend/compress to slight imperfections in the mating surfaces), and a means of holding the two surfaces tight against the gasket, to get such a seal. With 3D printing, it's plausible that the ...


1

I saw a lot of selling PETG water cooling pipes. So PETG will be the best choice considering all factors. In addition: You could use any plastic with the oil instead of water for cooling medium. Also automotive anti-freeze (G11, G12, G13 ...) designed to be non corrosive and much better than water in terms of cooling.


1

I believe this can be achieved using o-rings. That's what they use for scuba diving lights. The component doesn't need to be circular, but the o-ring needs to be slightly smaller than the component so that it is held in place via tension. Additionally, you'll want to create a groove for the o-ring to set it in and make sure that the o-ring protrudes ...


Only top voted, non community-wiki answers of a minimum length are eligible