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Hot melt glue (Read 1,190 times)
 
Ben Goeller
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Hot melt glue
Dec 1st, 2014 at 9:16am
 
I use hot melt to hold a lot of different things to the lathe while I turn as I'm sure many of you do. I was wondering what you all do to get the glue off after. ON the finished pieces, the pieces you are trying to make perfect. I  can't get the glue off unless I sand it and even then I'm not always positive I got it all off, and sometimes it shows when I put on the finish. Not a great time to find out!! Could use some of your expertise.
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Walt
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Re: Hot melt glue
Reply #1 - Dec 1st, 2014 at 10:28am
 
I use hot melt glue as you do, but only in places that will be cut off or not seen at all.  Any glue will cause this discoloration when finished.
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Paul wells
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Re: Hot melt glue
Reply #2 - Dec 21st, 2014 at 9:01pm
 
I read some place where mineral spirits would clean it up but I havnt tried it yet.
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Ken Vaughan
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Re: Hot melt glue
Reply #3 - Dec 21st, 2014 at 11:58pm
 

There are several different grades of hot melt glue.  Some have considerably less penetration (and holding power) than others.

I have uses "sanding sealer" - usually white or bleached shellac - where I was going to attach hot melt glue -- and expect about 50% of the holding ability, but it does not get into the wood.

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Ben Goeller
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Re: Hot melt glue
Reply #4 - Dec 22nd, 2014 at 5:46am
 
Thanks I'll try that.
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David Muehlbauer
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Re: Hot melt glue
Reply #5 - May 6th, 2016 at 9:48pm
 
I use hot melt glue, but only one ring around the edge of the round waste block. When I'm finished with the bowl I use a parting tool to cut the glue bead out. Then I scrape as much off as possible with a putty knife and then scrub the remainder off with mineral spirits and a rag or ScotchBrite pad. Some sanding is necessary if you catch the bottom with the parting tool, but this has been minimal.
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Bruce Kamp
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Re: Hot melt glue
Reply #6 - May 7th, 2016 at 9:28am
 
I have been using it to center rings. I use a little on four small wood blocks to mark the position of the ring. It has worked great so far. Of course any mark gets turned off using it this way.
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Ken Vaughan
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Re: Hot melt glue
Reply #7 - May 7th, 2016 at 9:41am
 
Denatured alcohol helps break the bond on hot melt glues, especially the lower temperature ones.  Mineral spirits also helps break bonds.

Cold temperatures make it brittle, and it usually pops free with a tap.  Cold temperatures means winter freezing ( or in the freezer) temps.

Mineral spirits or DNA also help free up double stick tape and clean up the residue.

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Ed Weber
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Re: Hot melt glue
Reply #8 - May 7th, 2016 at 11:17am
 
A word of caution for those who don't already know.
Typical hot melt glue (there are many grades) is great for centering rings or temporarily holding pieces.  Most of these glues do not have the strength by themselves to hold securely enough to withstand the forces incurred during turning.

IMO hot melt glue should be treated much like MDF.
You can use it for turning applications but care must be taken to use it properly and safely.
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David Muehlbauer
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Re: Hot melt glue
Reply #9 - May 7th, 2016 at 1:26pm
 
Not to contradict people with much more experience than me, I just wanted to describe my process more. I found this process online: Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to Login or Register

I use a hardwood glue block, and make it as large as possible. I turn it round, and cut a groove into the edge for the bead of glue. I also slightly concave the block to assure a good fit. When I am turning the outside of the bowl, I use the tailstock with a piece of plywood covering the top opening of the bowl. I have yet to have any issues, but the bowls I turn are relatively small (largest has been 9" in diameter and about 6" deep).

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« Last Edit: May 7th, 2016 at 1:27pm by David Muehlbauer »  
 
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Ed Weber
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Re: Hot melt glue
Reply #10 - May 7th, 2016 at 1:42pm
 
David Muehlbauer wrote on May 7th, 2016 at 1:26pm:
When I am turning the outside of the bowl, I use the tailstock with a piece of plywood covering the top opening of the bowl. I have yet to have any issues, but the bowls I turn are relatively small (largest has been 9" in diameter and about 6" deep).


This is what I mean when I say the glue isn't strong enough on it's own, the tailstock must be used or failure will most likely occur.
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David Muehlbauer
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Re: Hot melt glue
Reply #11 - May 7th, 2016 at 3:16pm
 
How do you mount your bowls?
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Ed Weber
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Re: Hot melt glue
Reply #12 - May 8th, 2016 at 9:32am
 
I typically  use a glue block.
I'll glue the base, bottom ring or section to a glue block that fits onto either a faceplate or into large jaws (1oomm). I use one of the Titbond PVA glues depending on the project.
I prefer to mount securely enough to not need the tailstock.
Many times pieces are constructed a ring or two at a time, due to either size or shape. It's not always easy or even possible to turn the insides of pieces if they were to be completely assembled prior to turning.
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