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| Broken case (superglue?) |
Posted by: eraser on 2010-10-25 18:08:04
Hi all.
I have an LC that has a damaged plastic case. Can it be reliably repaired with superglue? Is there a better way to repair it?
Thanks!
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Posted by: Dennis Nedry on 2010-10-25 19:34:58
From my experience, Super Glue works incredibly well on old Mac plastics. Be aware that the invisible white fumes given off as it dries will accumulate on things things, especially metallic, clear, and dark colored materials, and it rarely comes off.
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Posted by: Anonymous Freak on 2010-10-25 21:14:31
I used super glue to successfully repair the top case of an Apple IIc+ that had cracked across a few "spars". Nearly impossible to tell the repair was done.
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Posted by: Byrd on 2010-10-26 15:59:56
Super glue is good but can be very brittle, good for small cracks in cases. For larger cracks or joins requiring more strength, I find JB weld works well (available from auto stores), and for gluing metal-metal or plastic-metal. It is easier to work with, just wipe any any excess before leaving it for 24 hours.
JB
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Posted by: Dennis Nedry on 2010-10-26 20:37:10
I agree that super glue is often brittle on plastic, but with some plastics, the plastic actually appears to "melt" together as you're applying pressure. When this happens, you know that the bond will be very strong. From my experience, Mac cases are this type of plastic. I had a latch break off of a 6100. These take a lot of pressure and mine has not broken again.
JB Weld is amazing stuff, but it always leaves at least a tiny gray mark whereas super glue is clear.
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Posted by: madmax_2069 on 2010-11-06 06:16:39
I just use plastic epoxy that you can also pick up at a auto store.
the stuff is a heck of allot stronger then any superglue that i have found, heck you can even use it to fabricate parts (like you can do with bondo on a car). its great stuff to use.
there is also different mixes for glass, wood, and metal, and PVC and so on. if you ask me this is the JB weld for plastic (you also don't have to worry about it drying dark either).
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Posted by: Trash80toHP_Mini on 2010-11-06 13:39:12
To get a perfect weld (chemical) job on ABS plastics (Mac cases, IIRC) you can use either ABS Cement, from anyplace that sells pipe, or use full strength MEK (Methyl Ethyl Keytone) for ABS, PVC or Acrylic (Plexi) and any other solvent weldable plastics. It's the active ingredient for all the glues for the plastics listed as well as styrene (Model Cement) and others.
USE IT OUTDOORS! KEEP THE BREEZE TO YOUR BACK! It's very flammable and the fumes are very toxic!
Clamp the crack together and apply with a brush to the back side and capillary action will flow it through the entire crack surface.
If you want to use it as Acrylic/Plexi Cement, as sold in Hobby Shops, just mix it 50/50 with clear acrylic/Plexi. You can dissolve more acrylic into it to get a gloppier solution to fill loose cracks better. I haven't tried it yet, but I'm saving Mac case scraps to try the same in proper MacBeige™ tones.
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Posted by: Bunsen on 2010-11-10 07:29:56
MEK / dissolve / Mac case scraps One wonders ... if you made a thick enough solution, could you actually mould new parts this way?
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Posted by: Trash80toHP_Mini on 2010-11-10 12:17:33
Me wondered if anybody would extrapolate THAT interesting lil'xperimental process! :lol:
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