Airtight interlock design 1

[reyemka]

Can anyone offer some advice on airtight interlock designs? The device I'm working on has two shelled parts that are snapped together to form a case and it needs to be airtight. It is a breathing device so the pressures are low (< 1 psi). I've attached a PDF showing the design.

Thanks,

 

[MikeHalloran]

I'm not seeing a snap.


Mike Halloran
Pembroke Pines, FL, USA

 

[reyemka]

The snaps will be separate from the seal. I'm just showing the sealing features in the attached files.

 

[MikeHalloran]

The groove allows solvent bonding.

Is the joint everywhere convex, or have you some other means to force the sealing surfaces together?



Mike Halloran
Pembroke Pines, FL, USA

 

[reyemka]

Should have mentioned that it needs to be opened for cleaning, so any type of permanent bonding is not appropriate.

 

[MikeHalloran]

If the linear dimensions are in mm, it seems a little delicate for repeated disassembly. How does the user disengage the snaps and/or jack the halves apart without damage?



Mike Halloran
Pembroke Pines, FL, USA

 

[cpretty]

Here is one of the best at doing this sort of thing.

http://www.capitolvial.com/tech/overview.aspx

Their process is quite a tidy solution to acheiving a good seal plastic parts.

Craig Pretty
Tru-Design Plastics