Glueless and screwless waterproof plastic enclosure

[Pand3mic]

Hey guys,

I want to design my own plastic enclosure that is waterproof (maybe 3D print it). In basic terms, it would be a rectangular basin type design with a lid that fits over the top. Once it fits over the top. It should not be able to be removed.

I want to avoid using glue or screws. What are my other options?
I was thinking that a snap fit design might work but it may not be possible to make it waterproof.

 

[dgallup]

How waterproof? Everything leaks if you have a sensitive enough measuring system. For very low pressure differential you may be able to get a snap fit to give a "waterproof" seal. Zip lock bags do it all the time. If your requirements are more severe you will probably need some kind of elastomeric seal.

----------------------------------------

The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[CoryPad]

Snap fit plus an elastomeric seal, perhaps something like this:

 

[hendersdc]

I wouldn't recommend trying to 3D print a waterproof enclosure as most 3D printable materials are porous and readily allow water through. Ultrasonic welding can produce a hermetic seal or snaps with a gasket like dgallup and CoryPad said would work.