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[OM] Re: [OT] Plastic repairs

Subject: [OM] Re: [OT] Plastic repairs
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Thu, 06 Dec 2007 08:27:22 -0500
"Goo" takes a long time to cure fully but it does stay rubbery. 
Exposure to heat (like a hair drier) will cure it faster. I was 
surprised to see that (in atleast one in-depth test series) Gorilla Glue 
produces a very weak bond, especially on wood (yellow carpenters glue is 
much better). Good ad campaign though, got me to buy a bottle.

___________________________________
John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington NY 11743
631-424-2121 | Olympus OM Service since 1977
http://www.zuiko.com  |  omtech1 AT verizon.net


Chuck Norcutt wrote:
> Seeking the list wisdom on repair of a broken, hard plastic item.
> 
> Yesterday my snowblower's plastic headlight casing finally gave up the 
> ghost.  After 12 years of vibration the mounting boss on the bottom of 
> the case finally cracked all the way through its attachment point at the 
> bottom of the case and the headlight assembly fell off to be left 
> dangling by its electrical cord.  The resulting hole is relatively 
> rectangular and approximately 30x40mm with the walls of the case about 
> 2mm thick.
> 
> The question is; what should I use to glue it back together. 
> Cyanoacrylate glue seems not the right thing to me since, although the 
> pieces fit back together fairly well, there are small gaps around the 
> periphery that I don't think will be bridged well by a "super glue".
> 
> I considered epoxy which will bridge the gaps but epoxy strikes me as 
> brittle and I suspect the bond or the epoxy might fail from vibration 
> faster than the original plastic case material.
> 
> The only other glue I have on hand is a tube of JH's favorite contact 
> cement, Walther's "Goo".  Perhaps that or "Gorilla Glue" (which I have 
> never used) might be a bit flexible and stand up to the vibration.  The 
> break has edges which are tapered inward so the mounting boss fits back 
> in place quite well and will easily stand up to clamping back in place.
> 
> Any and all advice appreciated.
> 
> ps:  I briefly considered mounting all 5 T-32's on the handlebar but I 
> don't think I can see fast enough to keep up.
> 
> Dr. Flash
> 
> 


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