Plug Seal interference
Plug Seal interference
(OP)
I need to checks interference fit specs for a polypro plug seal into a glass bottle. I currently have a .0177 interference at MMC but that is too high to function properly. Before just loosening the fit I would like to go over reccommended interference specs for this fit, however I have not found anything on a web search.
Machinery's Handbook has interference fit specs that I will be researching but it does not take into account the polypro elasticity.
Does anyone have recommended interference fits for a polypro plug seal into a fixed (glass) cylinder?
This is for a problem that has just exploded onto my desk and that I have to answer quickly so thank you for any help.
Machinery's Handbook has interference fit specs that I will be researching but it does not take into account the polypro elasticity.
Does anyone have recommended interference fits for a polypro plug seal into a fixed (glass) cylinder?
This is for a problem that has just exploded onto my desk and that I have to answer quickly so thank you for any help.





RE: Plug Seal interference
However, I don't recall ever seeing a solid PP plug; it seems customary to relieve the center or otherwise make them hollow.
Mike Halloran
Pembroke Pines, FL, USA
RE: Plug Seal interference
Thanks
RE: Plug Seal interference
Is the plug fracturing the bottle necks?
Is it too hard for the assembly tooling to push in?
Just for fun, what's the nominal diameter?
Mike Halloran
Pembroke Pines, FL, USA
RE: Plug Seal interference
I would think the compression factor would or might be
one third of the elastic or tension factor. It might
make sense to use a tapered id or tapered hole on this
part.
RE: Plug Seal interference
This url is for o-ring compression rates and may give you
some ideas. I saw this on another post.
RE: Plug Seal interference
We went ahead and used standard FN1 interference tolerances on the plug (the hole was set because of method of manufacture)
thanks for all your assistance.