Bottle thread
Bottle thread
(OP)
I am designing a molded cap for a sports bottle. I am looking for the physical dimensions of a 28mm bottle thread. Any suggestions where I can find those dimensions?
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RE: Bottle thread
Mike Halloran
Pembroke Pines, FL, USA
RE: Bottle thread
Just go out, buy a bottle and measure it.
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RE: Bottle thread
Old-ish thread but I recently came across an SPI document/standard that might be useful. Although I haven't read it myself:
SPI's website is http://www.plasticsindustry.org/search/index.htm
"AU-124 Dimensions and Tolerances for Plastic Bottles"
From a design for recycling perspective download the "Recyclability by Design" guide from http://www.recoup.org/business/default.asp. It is an excellent introduction into designing packaging and similar hi-volume consumer products for recycling.
RE: Bottle thread
http://www.closuremanufacturers.org/
Click on the specifications tab.
RE: Bottle thread
Basically
"T" 1.078 +- .010 (thread DIA)
"E" .984 +- .010 (Neck DIA)
"S" .046 +- .015 (Start of thread from bottle face)
"H" .400 +- .015 (dim from face of neck to bead or shoulder, measured paralell to thread)
.167 Pitch
45deg top thread face angle, 10deg bottom if style "M" thread
.084 thread height
RE: Bottle thread
RE: Bottle thread
RE: Bottle thread
We did design a 28mm cap but that was for a soda bottle.
Now we are onto a 27mm bottle cap for water. This is truly the sports type cap. Weisco is correct. It has a triple lead thread and opens on about a 1/4 turn.
Now I'm looking for these dimensions!!!
RE: Bottle thread
I was thinking of buying this book
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anyone recommend it?
Thanks
RE: Bottle thread
Assuming you're using a good 3d CAD package it shouldn't be too much trouble to model the thread accurately. I know ProEngineer has some good tutorials for modelling threads as does Solidworks.
Next step is the actual design. Would recommend looking up the SPI standards and those available at the Closure manufacturers. See above messages for the links.
Finally if all else fails, if you've got an actual bottle thread that you like grab some verniers/calipers and measure them directly.
PS. Word of warning for making anything in China (or anywhere for that matter)...check the mould drawings/cad as I've seen instances where they haven't taken shrinkage into account and have machined plastic molds directly from supplied CAD files. It should be the tool-maker's responsibility but always worth checking...
Hope that helps.
RE: Bottle thread
I understand where you're coming from. You're looking for the phsyical dimensions to model in the thread. What I found out since starting this thread is that most molded bottle threads are proprietary to the manufacturer of the bottle. There are some standard dimensions. You can get those at the website that Wiseco menstioned above. www.closuremanufacturers.org. They told me that if they dont have the dimensions then it must be a proprietary thread. In that case, you will have to measure it.
RE: Bottle thread
Andy
RE: Bottle thread
Is it listed here? http://www.plasticbottle.com/techinfo/spi.html
RE: Bottle thread
Is it listed here? http://www.plasticbottle.com/techinfo/spi.html
I measured a 20 oz Sam's Choice water bottle, but the thread pitch came out different.
RE: Bottle thread
Regards
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RE: Bottle thread
I have to design a custom cap. On your post above for a 28mm -400 bottle, you call out the dimensions for the OD of a bottle thread. I was wondering how you would call out the ID for a cap? Is there a standard someplace? The bottle thread that i need is 58-400.
Thanks,
Meredith
RE: Bottle thread
http://www.plasticbottle.com/techinfo/spi.html