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.
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.
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