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Registered Member #618
Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
Haha, I as ked this same question a while back, and our resident master of Plexiglass (acrylic) Chris, said its best if you just bond Plexi to plexi with some chemical, but I have yet to find an easy and quick access to.
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
teslacoolguy wrote ...
I need to bond pvc pipe to plexiglass for the top and bottom of a secondary coil and i was wondering what is the best glue for the job?
I don't think any glue I know would create a good bond for that, both PVC and plexiglass are rather problematic for gluing and as I understand area of your bond is rather small.
What is wrong with two round pieces of wood in each end of the pipe, and several small screws around circumference?
Registered Member #1107
Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
Well actually there will be a 1/8" lip and the other 3/8" of the plexi will be slipped inside of the pvc because i will mill it down on the lathe and i was going to apply the glue to the inside making more surface area for the glue to stick to.
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
If you really want to use glue on PVC, you should sand the surface well with most coarse sandpaper, and then make cuts and grooves in it with a scalpel to provide mechanical potential barrier. That is considering you have enough surface. I myself drill holes and cover them with tape when casting resin into pipe, so it fills the holes and remains stable - you could do that too.
You should do the same for acrylic if possible, though it's usually somewhat easier to glue than PVC. My glue of choice would be 2-component epoxy.
Still I can't see how would this be better than screws even if the glue holds up. If you must use plexi over wood, it is even possible to tap threads in it carefully - Chris H. does that all the time.
Is your winding already wound and happening to cover entire length of the pipe with no room for screws?
Registered Member #1107
Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
It is already wound but there is still inough room to put some screws in it. I wanted to use plexi because everything else is made from plexi but i guess for the bottom one i can use 3/4" plywood and put somescrews in it.
Registered Member #1157
Joined: Thu Dec 06 2007, 12:11PM
Location: Houston, TX
Posts: 307
I use Loctite Sumo glue, or Gorilla glue. Sand the edges with some rough sandpaper, and apply the glue. That stuff is like AB foam, it will expand to fill the cracks and make a nice tuff bond. When it is done curing, you can take an exacto and trim off the extra or sand it off.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
You can use acetone (a solvent for both pvc and pmma) , put the two pieces together and let a small ammount of solvent into the joint by capilary action. OR if you go to a plumber's merchant get pvc glue! - the type used for connecting pipes & joints
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Solvent cement is great for joining like materials, but will not work for acrylic on PVC, even if both are dissolved. Plumber cement could work I guess if you can find some PVC board to use instead of acrylic.
Also, acetone does not dissolve neither PVC nor PMMA (I would wish it does!) They both require rather hard to find and expensive solvents.
I never had anything *glue* PVC well apart from glue made exactly for that purpose (which is in turn poor for anything else, I don't know how would it glue PMMA). It has some sort of activator that is applied by a pen before the glue.
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what glue should i use?
