Closed end rivets - Fiberglass RV


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Old 03-04-2012, 12:26 PM   #1
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Closed end rivets

Check this out...
Closed End Self Sealing Rivets : Riveting Tools : Rivits : Hanson Rivet & Supply Co. Inc.
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Old 03-04-2012, 04:46 PM   #2
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Very interesting Floyd, I would sure like to know if anyone has used these.
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Old 03-04-2012, 06:44 PM   #3
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Yes, I've used them. I built two 30 gal. water tanks for my boat out of aluminum and used them. The lap joints were epoxied and riveted. In the 10 years I had the boat the tanks never leaked.

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Old 03-04-2012, 07:24 PM   #4
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I have used them in the past. They keep the "rivet pulling nail" path closed. (through the center of the rivet) My scamp uses plastic cups under the rivet head, and a snap on plastic cover to waterproof the center. As long as the caps are in place the pop rivets need not be the sealed type.
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Old 03-04-2012, 08:03 PM   #5
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Quote:
Originally Posted by ruscal View Post
I have used them in the past. They keep the "rivet pulling nail" path closed. (through the center of the rivet) My scamp uses plastic cups under the rivet head, and a snap on plastic cover to waterproof the center. As long as the caps are in place the pop rivets need not be the sealed type.
Russ
I still contend that the purpose of the cap is cosmetic, since the Scamps from the 1970's didn't use them and didn't leak.
They need not be the closed end type to not leak even without caps.
These might be a solution for those whose opinion is at variance with mine.
This is what I wrote elsewhere....
Actually; those things are supposed to be water proof , for use like in
> a canoe or rainbarrel, No real need for them in a Scamp, but it might
> squelch some of the constant concern.(grinz) I just saw them for the
> first time today and I thought they were interesting.
> Regards;Floyd
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Old 03-04-2012, 10:26 PM   #6
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I have used them in the past to make repairs on an aluminum boat - they didn't leak...
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Old 03-05-2012, 06:54 AM   #7
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Interesting. How does the head or bead of the mandrel which is inside the closed tube of the rivet, grow in size to then expand the tube of the rivet? Anyone taken one apart to see? Raz
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Old 03-05-2012, 10:22 AM   #8
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Originally Posted by P. Raz View Post
Interesting. How does the head or bead of the mandrel which is inside the closed tube of the rivet, grow in size to then expand the tube of the rivet? Anyone taken one apart to see? Raz
I'm sure it works about the same way as conventional rivets work only the end is covered.
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Old 03-05-2012, 10:56 AM   #9
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Originally Posted by Ron in BC View Post
Yes, I've used them. I built two 30 gal. water tanks for my boat out of aluminum and used them. The lap joints were epoxied and riveted. In the 10 years I had the boat the tanks never leaked.

Ron
Ron, curious where did you find them in BC?
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Old 03-05-2012, 11:06 AM   #10
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Originally Posted by floyd View Post
I'm sure it works about the same way as conventional rivets work only the end is covered.
On a conventional pop rivet the mandrel head or bead is larger than the tubes inside diameter. Pulling the mandrel expands the tube and fastens the rivet. Here the head is inside the tube therefore it has to be smaller than the inside diameter. When the mandrel is pulled it must somehow expand to cause the tube to swell.
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Old 03-05-2012, 12:23 PM   #11
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Originally Posted by P. Raz View Post
On a conventional pop rivet the mandrel head or bead is larger than the tubes inside diameter. Pulling the mandrel expands the tube and fastens the rivet. Here the head is inside the tube therefore it has to be smaller than the inside diameter. When the mandrel is pulled it must somehow expand to cause the tube to swell.
I don't see where that is necessarily true. The tube could easily be formed around the head of the mandrel with that portion behind the head being of a smaller diameter than the head itself. Of course there could be a sleave inside the cover which would be on the mandrel behind the head.
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Old 03-05-2012, 01:01 PM   #12
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I don't see where that is necessarily true. The tube could easily be formed around the head of the mandrel with that portion behind the head being of a smaller diameter than the head itself. Of course there could be a sleave inside the cover which would be on the mandrel behind the head.
Sure, the tube must have a smaller inside diameter ( thicker wall) between the head of the mandrel and the head of the rivet. It could even be conical. Mystery solved.
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Old 03-06-2012, 05:07 PM   #13
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I used closed end rivets in the rebuild of my Boler, hundreds of them. So far so good. I never have considered exactly how they work but they do.
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Old 03-06-2012, 05:43 PM   #14
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I used closed end rivets in the rebuild of my Boler, hundreds of them. So far so good. I never have considered exactly how they work but they do.
Well Lizbeth, perhaps you or some one else can file the end off one, look inside and tell us how it works.
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Old 03-06-2012, 05:57 PM   #15
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Well... the ones I have are fastened to the trailer.

This might help...
http://www.emhartamericas.com/sites/...Closed-End.swf
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Old 03-06-2012, 06:15 PM   #16
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Well... the ones I have are fastened to the trailer.

This might help...
http://www.emhartamericas.com/sites/...Closed-End.swf

Very simple and very clever. Thank you. Raz
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Old 03-06-2012, 08:20 PM   #17
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Cool Closed End

Hmmm. It seems by the section way to the right of the link in the original post that the mandrel has a head on it and the rivet has a wide section to accommodate.
However, doesn't it still have a hole where water can get in and freeze thereby playing havoc with the rivet?

Curious minds want to know.

I would still seal the exposed end...

Neat video Lizbeth. Confirms the original link.
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Old 03-07-2012, 01:36 PM   #18
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Roger.... What's freezing water?
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Old 03-10-2012, 07:46 AM   #19
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What are rivets?
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Old 03-10-2012, 09:57 AM   #20
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A riveting discussion....
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