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11-04-2015, 05:44 PM
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#41
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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Just finished in the shop for the evening. The cans of MEK that I have are definitely MEK. Using a cotton swab I brushed some on one of the cracks of the valance and it definitely melted the plastic. I just ordered more ABS pellets, this time I hope they are the right ones
I thought about using some of the scrap ABS that I have laying around and it's pretty grungy and painted so I've opted to wait for the new stuff to come in before making repairs.
Several areas of the valance have been warped or deformed, is there a recommended method of reshaping the warped areas? I'm thinking heat gun but thought I would ask before attempting it.
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-04-2015, 11:03 PM
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#42
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Rivet Master
1982 28' Airstream 280
Port Angeles
, Washington
Join Date: Aug 2008
Posts: 1,943
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Quote:
Originally Posted by bkahler
Interesting stuff. The molding foam in the video is listed as 3 lb density, the above is 2 lb. I wonder how much difference that makes. I've sent a note off to the Industrial Polymers asking about price. It will be interesting to see what they have to say.
Brad
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That is the stuff. The density has to do with how dense it is when cured for insulation and flotation purposes. It's used a lot on boats for flotation and sandwich core deck construction. Marine supply outfits have it in different size kits.
__________________
Cheers, Dan
________________________________________
"Socialist governments traditionally do make a financial mess. They always run out of other people's money. It's quite a characteristic of them."
~ Margaret Thatcher ~
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11-05-2015, 03:56 AM
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#43
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Rivet Master
1979 24' Airstream Excella 24
Tipp City
, Ohio
Join Date: Feb 2012
Posts: 551
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Careful with the heat gun Brad. I found that a little heat would soften the old ABS and make it somewhat pliable but, too much heat made it want to return to its original shape. ie. a flat piece of material. when it gets that soft you need a mold to make the soft plastic to conform to.
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11-05-2015, 06:48 AM
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#44
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Rivet Master
2002 25' Safari
1977 20' Argosy 20
northern valley
, new jersey
Join Date: Nov 2008
Posts: 532
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Vacuform
__________________
Joseph & Gabrielle
Simplicity is the ultimate sophistication - Leonardo da Vinci.
WBCCI 2087 - AIR 3144 - TAC-NJ2
https://defendwally.org/
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11-05-2015, 03:42 PM
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#45
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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Quote:
Originally Posted by Smartstream
That is the stuff. The density has to do with how dense it is when cured for insulation and flotation purposes. It's used a lot on boats for flotation and sandwich core deck construction. Marine supply outfits have it in different size kits.
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Dan, thanks for the info. Industrial Polymers replied to my query and their pricing is about $15 cheaper than Amazon's listing.
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-05-2015, 03:45 PM
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#46
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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Quote:
Originally Posted by Gregsch
Careful with the heat gun Brad. I found that a little heat would soften the old ABS and make it somewhat pliable but, too much heat made it want to return to its original shape. ie. a flat piece of material. when it gets that soft you need a mold to make the soft plastic to conform to.
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Greg, sounds like a balancing act when using heat. I'll play with a heat gun on some scrap ABS and see where the point of no return is. Fortunately there are only a couple of areas that need re-shaping and worst case is a fiberglass mold would need to be tweaked in that area.
Thanks,
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-05-2015, 03:46 PM
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#47
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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Quote:
Originally Posted by jm2
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Joseph,
I can't imagine what made you think of the Mattel Vac U Form kit! Did you happen to have one as a kid?!
I wouldn't be surprised if a process similar to the Mattel toy was used to fabricate these valances.
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-05-2015, 06:02 PM
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#48
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Rivet Master
1979 24' Airstream Excella 24
Tipp City
, Ohio
Join Date: Feb 2012
Posts: 551
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Brad ,
Sorry I did not send you the info on the pellets before. Here is what I used;
ABS RESIN REGRIND PLASTIC FOR INJECTION MOLDING- 10lb. box. pellets
( 200964797368 )
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11-06-2015, 04:58 AM
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#49
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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Quote:
Originally Posted by Gregsch
Brad ,
Sorry I did not send you the info on the pellets before. Here is what I used;
ABS RESIN REGRIND PLASTIC FOR INJECTION MOLDING- 10lb. box. pellets
( 200964797368 )
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Thanks Greg. If the stuff I just ordered doesn't work I'll order the same stuff you used.
I'm hoping it arrives today or tomorrow as I'm going to have plenty of time on Sunday to work on things.
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-06-2015, 03:24 PM
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#50
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Rivet Master
2002 25' Safari
1977 20' Argosy 20
northern valley
, new jersey
Join Date: Nov 2008
Posts: 532
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Quote:
Originally Posted by bkahler
Joseph,
I can't imagine what made you think of the Mattel Vac U Form kit! Did you happen to have one as a kid?!
I wouldn't be surprised if a process similar to the Mattel toy was used to fabricate these valances.
Brad
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Brad,
just one of those disconnected thoughts while driving along the other day. didn't have one of these, I had two...
__________________
Joseph & Gabrielle
Simplicity is the ultimate sophistication - Leonardo da Vinci.
WBCCI 2087 - AIR 3144 - TAC-NJ2
https://defendwally.org/
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11-07-2015, 06:06 AM
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#51
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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Quote:
Originally Posted by jm2
Brad,
just one of those disconnected thoughts while driving along the other day. didn't have one of these, I had two...
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Somehow I'm not surprised by that revelation
Toys like that could never be made today due to all the liability issues and thats so sad.
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-09-2015, 12:20 PM
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#52
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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The new ABS pellets arrived Saturday and I've confirmed that the new pellets do melt when mixed with MEK
So hopefully over the next few evenings I can get some repair work done on the valance.
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-09-2015, 03:06 PM
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#53
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Keen amature
1975 20' Argosy 20
Chestfield
, Kent
Join Date: Mar 2014
Posts: 3,535
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Good luck!
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11-11-2015, 11:09 AM
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#54
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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I'm happy to announce that the valance repair using ABS slurry seems to be working. The last couple of evenings I've been doing repairs on small cracks and rivet holes figuring I ought to start small and work up to the big problems
There are several really bad tears in the valance so I'm going to need to figure out the best way to clamp things into position so I can add the slurry mix.
Pictures this weekend.
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-12-2015, 06:06 PM
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#55
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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I put more ABS slurry on some of the bottom cracks tonight. It's kinda of a slow process in that I can only repair a few cracks at a time. I have to try and line up a crack, clamp it and then apply some slurry mix to it. I can't do too many at a time for fear of getting cracks out of alignment while they are drying.
I'm mainly working on the bottom half on the inside. The repairs certainly seem to be stiff enough and should hold up while the fiberglass work is being done. Once all of the cracks have been stiffened sufficiently from the bottom I'll flip it over and start working on the exposed side.
This is the repair I'm working towards. It's going to take several attempts to get this whole area repaired.
It's amazing how thin the plastic is in some areas especially in curved spots. I assume that's due to the manufacturing process trying to stretch a flat sheet over a compound curve.
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-16-2015, 03:05 PM
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#56
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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Work is progressing on repairing the cracks in the valance. I've now flipped it over and have started repairing the two large tears on the top side.
I've pretty much come to the conclusion that my friend won't have the time to try to make a fiberglass mold. The house repairs are a LOT more extensive than was ever anticipated.
Out of about 156' of sill plate and header we've replaced 138' of sill and 125' of header. 100% of the sill was rotten/termite ridden and the bulk of the header was bad as well. At the same time we've had to scab new floor joists to every existing joist. The main problem with the floor joists is the 2x8 floor joists are spanning 14'. Way too long of a span for a 2x8.
The last 18' of sill and header are going to be a bear because they are behind a poured concrete deck
Martin, it looks like I'll be talking to you about figuring out where to have a mold made once I have the valance repaired.
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-16-2015, 03:16 PM
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#57
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Rivet Master
1982 31' Airstream 310
champaign
, Illinois
Join Date: Oct 2012
Posts: 4,072
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14' on a 2x8, trampoline. A wee bouncy in the center. Blocking in between joists may help a little. Piers and a beam would help a lot. No fun either way.
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11-16-2015, 03:24 PM
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#58
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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Mike, the original joists and sill plates were 1-3/4" thick by 7-3/4" tall which makes them somewhat stronger than modern 1-1/2" x 7-1/4" lumber that you get today. But even the original larger lumber was way undersized for a 14' span. You're right, it was like walking on a trampoline!
One of the fixes along with scabbing new floor joists to the old was to put a concrete block with a 4x4 post and wood shims under each joist in the center of it's span. On the back half of the house where the joist repairs are complete and all the joist support posts are in place it's like walking on a concrete floor. A HUGE change from what it was when we first walked into the house after he purchased it.
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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11-16-2015, 04:13 PM
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#59
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Keen amature
1975 20' Argosy 20
Chestfield
, Kent
Join Date: Mar 2014
Posts: 3,535
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Quote:
Originally Posted by bkahler
Martin, it looks like I'll be talking to you about figuring out where to have a mold made once I have the valance repaired.
Brad
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No worries Brad, equally if you can get yours close enough for you to use then don't risk ruining it to get a mold made. I can always come up with a 'plan B'.
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11-16-2015, 04:42 PM
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#60
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Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
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Martin,
I think going for a mold is the best approach. If making a mold from mine ruins it we're still ahead as there would now be a way to make replacements should we suffer damage of any kind. I do like the idea of a 3 piece mold as it would sure be simpler to handle and install.
I'm hoping to have the major repairs done to the valance by the end of the Thanksgiving weekend. Part of that weekend will be spent working on the house but I'm planning on a few days of personal time as well
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
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