I need help to make a thread successfully fit the bottle so as it is waterproof...!
I need help to make a thread successfully fit the bottle so as it is waterproof...!
correct me if i'm wrong, but aren't water/drinks bottle threads watertight anyway? I mean they don't leak do they? dont think they are special in anyway.
If you look at a bottle cap (at least every bottle cap that I have ever seen), you will notice that there is a rubber seal on the inside roof of the cap. The top of the bottle is driven in to this roof seal during the threading/tightening process. This also conveniently produces just enough preload to prevent the cap from screwing itself off.
This seal is what makes it waterproof.
Is that mean, the design is less bothered of the thread alignment?
Do we need to keep the helix angle thereby the pitch equal for bottle and cup?
Those threads are so lose anything can leak pass them.
Still it is crazy how much pressure the bottle could hold.
Yeah...if you want to test it, either take the rubber seal out or score it deeply. Then tighten the cap on and shake the bottle up (assuming you have something that is carbonated).
Make sure you do this somewhere where you don't want to ruin the carpet or furniture. LOL
it's not the thread that creates the seal, it's the gasket in the bottle cap or the o-rings in other devices that are watertight.
Let's do this experiment.
Pick up any water bottle.
Remove the cap.
Attempt to model the bottle and cap threads.
Post back with your attempt and any questions.
When this experiment is completed you should be able to model threads of any desired specification.
..well, it depends... (click)...to begin your journey....
Most cap and bottle manufactures follow standard sizes for different needs. I work in the glass industry and we mostly use "GPI" standards. http://gpi.org/industry-resources/finish-drawings The most common is the 400 size of the finish. Hope this helps.
You own me a 2L bottle of pop.
Thread definitely not sealing.
Seal is mold in.
this is cool....
Thank you all for the considerations given to my little question.... Each of your words gave me new knowledge...
but in some cases the width of the grooves are'nt same...! then how it aligns, the bottle thread and the cap thread?
Hi,
In which material do you have to make the thread??
I think the waterproof it is not about the thread, it is more about having a rubber seal wich close the gap between the cap and the bottle.
Maybe I am wrong, but it is the way I will do that.
Regards,
Ignacio