Have an laminated osage bow in the oven. How long till it can come out?
Instructions on my bottle says clamp time is 30 mins and not to stress for 24 hrs..
I really don't like to use this type of glue with such oily wood like Osage. Good luck.......Art
Used acetone prior to glue up and wiped it down good to remove residue. It has failed me once but I believe it was due to starved glue joint.
I always use TB3 but I have never put it in an oven. I always just let mine set for a couple of days. Like vanillabear said I think it liquifies at 150.
Ok, I turned it off and opend the lid. 2 hours at 150. We'll see how it does. I'll leave it till tomorrow before I take it out of the press.
This is the modified KennyM form I made. The power lam is between the taper and the parallel lams. This whole project is new ground for me.
I think you made a big mistake by heating up that glue like that. Perhaps thats why it failed you before?
I strongly advise using URAC185 for wood to wood applications. It's really not that expensive in the long run. I've never had a URAC glue joint come apart.
Roy and Pa. What temp do you heat your urac to?? I've only used TBIII but plan on using the urac
Both URAC and TBIII cure at room temp (although URAC can be heated in an oven). And yes, a cured TBIII joint will release right around 150 degrees.
I often use TBIII. I glue it up at room temp and don't stress the joint for at least 24 hours.
Hope this helps. :)
URAC will dry in 6 hours at 70 degrees. Will dry in 1 hour at 100 degrees. However, that applies to unstressed glue joints. I make reflex / deflex bows, so that is a lot of stress. I put my bows in a heat box at 90 degrees for 24 hours to be safe. If I am going to put hours in building a bow, I want to use the best glue I can and let the glue dry for 24 hours to be safe. With that being said, I feel 24 hours at 70 degrees would work. But I feel better with 24 hours at 90 degrees.
In the past, I have rushed bow's, only to have failures on down the line. Nothing hurts more than losing a bow on the tillering tree, when you have 20 to 30 hours in, plus the cost of the materials. Trust me, I know:)
You had better seperate your glue up and re-glue it. If it was at 150 deg for two hours the TB glue is probably no good after the high temps. Cure TB glues at room temp.
Jim,
I've never used heat to cure TB111. Right now a riser is cooking in the oven at 170 Degrees but that is with Smooth On.
I will say this, though, I don't believe all is lost for your project. I have in the past steamed a riser (2 for that matter) for over an hour to induce a setback handle. That riser had the grip built up with wood and TB111. Upon removing the bow from the steam the glue joint was very loose and I could have taken it apart. Instead I just realigned it and clamped it into the setback jig. The next day all was well and the riser/s never seperated.
This isn't something I will intentionally do but that showed me that the glue reactivated.
May as well finish the bow and see how it holds up.
1st time I used heat with tightbond. Thanks guys.
Mite I add why your using TB instead of Urac?
Thanks for the help on the urac times everybody
I have played the bow building game for years. For wood to wood glue up's, no other glue works as good as URAC185. And it does not need to be placed in a hot box. 70 degrees is fine, glue up the bow, and let it sit for 24 hours.
It is what I have on hand.
Understood Razor. Just suggesting the URAC to you for future bows. You will not be dissapointed with URAC.
I've had the glue fail on any backed bows I've made with TBII or TBIII. I do like Urac but TB glues work just fine.
I would be concerned about the glue you heated up to 150 deg for 2 hours though. Call TiteBond's tech support and ask them. That's how I found out about it releasing at 150deg. If it were my bow, I wouldn't take the chance of the heated glue being OK.
You do not want to heat any of the Titebond glues. It is designed to release at about 150' on purpose. Urac 185 can handle higher temperatures than 150' (but it should not be heated beyond 100' for curing). This information is from the makers of each product.
Well this bow is going to be a test subject. Right now it is 40 @ 26. That is about what I was shooting for. I'll keep you posted on how it does.
I will not ever put TB glue in the oven again though.