Re: ABS plastic repair
[Re: Barnabas_Kriss]
#155063
11/22/08 07:07 PM
11/22/08 07:07 PM
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Joined: Jan 2003
Posts: 42,714
Spokane Washington
ScottSmith_Harms
Mr Wizzard
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Mr Wizzard
Joined: Jan 2003
Posts: 42,714
Spokane Washington
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It's called MEK (Acetone works to). Mix up some in a glass jar with some shavings of ABS (old grille pieces work well) and let it sit overnight (it will melt into goo) you want to end up with a mix that's something roughly the consistancy of wet peanut butter. Prep the edges of both pieces of the part by sanding them to a beveled edge, point the edges together aligning them and use clear packing tape to secure them and keep them aligned from the underside. Smear a nice pile of the goo into the new joint on the top side until it's piled high like a weld in metal. Let it dry a couple days, sand smooth. For thicker parts do the same process on both sides repeating the process the same way. <img src="/ubbthreads/images/graemlins/Twocents.gif" alt="" /> Here's an ancient Moparts thread as well Moparts Grill Repair
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Re: ABS plastic repair
[Re: larry4406]
#155065
11/23/08 11:19 AM
11/23/08 11:19 AM
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Joined: Jan 2003
Posts: 21,072
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
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Find locktite 401 superglue it will hold anything ive fixed a few taillights and grills with it
Last edited by therocks; 11/23/08 11:20 AM.
Chrysler Firepower
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Re: ABS plastic repair
[Re: ThermoQuad]
#155067
11/23/08 10:09 PM
11/23/08 10:09 PM
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Joined: Jan 2003
Posts: 27,468
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,468
So Cal
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Quote:
Use the grille pieces melted in mek. It's the best fix out there. Make sure the pieces are clean and have no paint on them. Make it like described-peanut butter like. It may take a day or so to melt the plastic and get the mek to flash off enough for the right consistency. It takes about a full week to flash off all the solvent so be patient!!!! I just restored a 1970 Charger R/T grille that had holes on from foglamps and broken pieces. It came out very nice...I will look for the pics...but in the meantime check it out your view of the beast under construction
What do you mean by the flash off all the solvent. Is there a mixing ratio of MEK to ABS? Whould things happen faster if you ground the ABS up?
BTW, I spy a Willwood box in the picture Tom. Anything interesting with that build?
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Re: ABS plastic repair
[Re: autoxcuda]
#155068
11/23/08 10:15 PM
11/23/08 10:15 PM
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Joined: Jan 2003
Posts: 42,714
Spokane Washington
ScottSmith_Harms
Mr Wizzard
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Mr Wizzard
Joined: Jan 2003
Posts: 42,714
Spokane Washington
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The flash off = The MEK/Acetone will evaporate from the melted plastic. Time varies with the initial mixture, temperature, and other environmental variables.
Bottom line, one day, 3 days, a week, you'll know when it's ready to sand when the plastic returns to a hardened state, if it's not fully cured it can gum up while being sanded.
When you break down ABS this way it does change it's chemical composition somewhat, it will lose some of it's "stiff" properties and stay just a tad to the flexible side (a good thing when fixing cracked/stressed areas) so don't expect it to return to a rock hard state, just close to it.
Also keep in mind that the glueing or welding portion of a plastic repair job is the easy part, the real, skill, time, and effort falls into the sculpting, sanding, priming, painting, etc. Just like body work in miniature. Practice, practice, practice..
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Re: ABS plastic repair
[Re: autoxcuda]
#155071
11/24/08 12:38 AM
11/24/08 12:38 AM
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Joined: Aug 2003
Posts: 2,466
Answering the call of the wild
ThermoQuad
top fuel
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top fuel
Joined: Aug 2003
Posts: 2,466
Answering the call of the wild
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Quote:
What do you mean by the flash off all the solvent. Is there a mixing ratio of MEK to ABS? Whould things happen faster if you ground the ABS up?
BTW, I spy a Willwood box in the picture Tom. Anything interesting with that build?
You can do lots of tricks with the goo...if you are in a hurry to have it ready you can grind it up but why work so hard???
As to the Charger... well...it's like my AAR as far as tires/suspension up, 440/4bbl iron head auto car. TTI, Firm Feel, RMS etc... 355 dana, 4w disc, corbeu seats, 5 pt seatbelts, etc etc etc. The 440 was built by some one who build nascar engines for one of the big dogs. Welded and gusseted K frame, frame ties, Front rear spring boxes & more, Blacked out front rear incl hood...beastly
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Re: ABS plastic repair
[Re: ScottSmith_Harms]
#155072
11/24/08 12:59 PM
11/24/08 12:59 PM
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Joined: Jan 2008
Posts: 2,592
None
71rm23
master
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master
Joined: Jan 2008
Posts: 2,592
None
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Quote:
It's called MEK (Acetone works to). Mix up some in a glass jar with some shavings of ABS (old grille pieces work well) and let it sit overnight (it will melt into goo) you want to end up with a mix that's something roughly the consistancy of wet peanut butter. Prep the edges of both pieces of the part by sanding them to a beveled edge, point the edges together aligning them and use clear packing tape to secure them and keep them aligned from the underside. Smear a nice pile of the goo into the new joint on the top side until it's piled high like a weld in metal. Let it dry a couple days, sand smooth. For thicker parts do the same process on both sides repeating the process the same way.
MEK (Methyl Ethyl Ketone) works good. Stinks though-good way to clean sinuses Have it at work. Good info from Scott 
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