PET bottles that don't fit 1/2" PVC
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PET bottles that don't fit 1/2" PVC
Our family took a 6000 mile expedition this summer visiting a huge chunk of the western half of the US. In the middle of it all, we stopped by Sequoia National Park in California to teach a Water Rockets class at their Dark Sky Festival in July.
While I was there in CA, we found numerous carbonated beverage bottles of various sizes that would not mount on a 1/2" PVC pipe. The throat of the bottle nozzles appeared to be up to 1mm smaller than the outside diameter of standard PVC pipe.
I kept a sample of them so I could examine them more closely. Pictures and videos to follow.
While I was there in CA, we found numerous carbonated beverage bottles of various sizes that would not mount on a 1/2" PVC pipe. The throat of the bottle nozzles appeared to be up to 1mm smaller than the outside diameter of standard PVC pipe.
I kept a sample of them so I could examine them more closely. Pictures and videos to follow.
Bugwubber
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Re: PET bottles that don't fit 1/2" PVC
Here's a sample of the narrow bottles followed by a couple normal sized bottles.
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Bugwubber
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Re: PET bottles that don't fit 1/2" PVC
Maybe the PVC expanded
More likely, they are making them smaller to reduce costs and save the planet.
More likely, they are making them smaller to reduce costs and save the planet.
-Blenderite
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Check out my YouTube channel: https://www.youtube.com/c/Blenderite
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Re: PET bottles that don't fit 1/2" PVC
They didn't fit on my 5x launcher so I used that stubby launcher to test the bottles. Once I unpack, I'll take some measurements.DogLover wrote:Maybe the PVC expanded
More likely, they are making them smaller to reduce costs and save the planet.
Bugwubber
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Re: PET bottles that don't fit 1/2" PVC
PVC measures 21.42mm Normal bottles are measuring 21.5-21.6. These bottles are measuring 21.4 and smaller.
Bugwubber
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Re: PET bottles that don't fit 1/2" PVC
bugwubber wrote:Our family took a 6000 mile expedition this summer visiting a huge chunk of the western half of the US. In the middle of it all, we stopped by Sequoia National Park in California to teach a Water Rockets class at their Dark Sky Festival in July.
While I was there in CA, we found numerous carbonated beverage bottles of various sizes that would not mount on a 1/2" PVC pipe. The throat of the bottle nozzles appeared to be up to 1mm smaller than the outside diameter of standard PVC pipe.
I kept a sample of them so I could examine them more closely. Pictures and videos to follow.
Are you going to do a write-up regarding the Dark Sky Festival? That would be very interesting.
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Re: PET bottles that don't fit 1/2" PVC
Yes just trying to get pictures and things together. Have a missing camera chip that I'm hoping to find unpacking. Hoping I didn't leave it in San Francisco.U.S. Water Rockets1 wrote:bugwubber wrote:Our family took a 6000 mile expedition this summer visiting a huge chunk of the western half of the US. In the middle of it all, we stopped by Sequoia National Park in California to teach a Water Rockets class at their Dark Sky Festival in July.
While I was there in CA, we found numerous carbonated beverage bottles of various sizes that would not mount on a 1/2" PVC pipe. The throat of the bottle nozzles appeared to be up to 1mm smaller than the outside diameter of standard PVC pipe.
I kept a sample of them so I could examine them more closely. Pictures and videos to follow.
Are you going to do a write-up regarding the Dark Sky Festival? That would be very interesting.
Bugwubber
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Re: PET bottles that don't fit 1/2" PVC
no good news, the trend seems to be reduce the sizes.
Not so long ago new smaller caps were also introduced with a smaller thread.
Also it is becoming more difficult to find bottles with a straight contour.
Challenges...
Not so long ago new smaller caps were also introduced with a smaller thread.
Also it is becoming more difficult to find bottles with a straight contour.
Challenges...
ptx
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Re: PET bottles that don't fit 1/2" PVC
I am placing an order for 1000 pre-forms, just in case.
-Blenderite
Check out my YouTube channel: https://www.youtube.com/c/Blenderite
"Get it right, then go for GREATNESS!"
Check out my YouTube channel: https://www.youtube.com/c/Blenderite
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Re: PET bottles that don't fit 1/2" PVC
Did you come.up with a blow mold or will you.be attaching the nozzles to ftc?DogLover wrote:I am placing an order for 1000 pre-forms, just in case.
Bugwubber
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Re: PET bottles that don't fit 1/2" PVC
Blow molding the bottle preforms is not terribly difficult. You can blow mold into a simple PVC pipe. This solves the issue of trying to mold an entire bottle because the enclosed mold will trap air if it has a bottom. Getting rid of the bottom allows the air to come out of the mold, and since you usually cut off the bottom of the bottle, the poorly formed bubble that forms on the end is cut off anyhow.bugwubber wrote:Did you come.up with a blow mold or will you.be attaching the nozzles to ftc?DogLover wrote:I am placing an order for 1000 pre-forms, just in case.
The real problems come from uneven wall thickness and poor pre-stressing the PET molecules due to uneven heat and the lower pressure you will likely be molding with. You won't get the same strength across the circumference from one bottle to another.
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Opportunity is missed by most people because it is dressed in overalls and looks like work. --Thomas Edison