Primitive Archer

Main Discussion Area => Bows => Topic started by: lesken2011 on July 07, 2012, 11:54:42 pm

Title: Glue laminations and heat
Post by: lesken2011 on July 07, 2012, 11:54:42 pm
I know I have seen posts related to this, but I'm not sure I have ever seen it specifically addressed. I did a Hickory backed Ipe bow and was planning on doing another 100 shots this weekend. With the 100+degree days we are having, I am a little nervous about continuous shooting in the heat. When I did the glue up I did so in 70+ degree temperatures naturally with no artificial heat source and used TB3. I also allowed the glue plenty of time to completely cure before I started working on it. The bow shoots great, so far, with no signs of delaminating after 100+ shots. Once the glue cures, are there dangers to the glue while shooting in extreme heat?
Title: Re: Glue laminations and heat
Post by: gstoneberg on July 07, 2012, 11:58:35 pm
I think it'd take putting the bow in a car parked in the sun with the windows up before you'd reach the temps needed to affect the glue.  Shooting outside should be no problem.

George
Title: Re: Glue laminations and heat
Post by: Pat B on July 08, 2012, 12:11:07 am
TB glues will break down at 150deg(F). As long as you don't have your bow in direct sunlight you should be OK.  If the bow feels physically hot to the touch I wouldn't brace it until it had plenty of time to cool down.
Title: Re: Glue laminations and heat
Post by: Rufledt on July 08, 2012, 01:32:47 am
You are more manly than I, Lesken.  When I see 100+F days in the forecast I don't make plans for shooting, I crank up the A/C and crack open a mt. dew!
Title: Re: Glue laminations and heat
Post by: lesken2011 on July 08, 2012, 09:59:48 am
Whew! I was hoping it would be OK. Thanks for the feedback!!
Title: Re: Glue laminations and heat
Post by: Marc St Louis on July 08, 2012, 02:35:48 pm
You will see how much heat it takes to soften the glue with the use of a heat gun once you have tried to take the backing off a bow glued up with TB3
Title: Re: Glue laminations and heat
Post by: Pat B on July 08, 2012, 02:39:35 pm
That's how I found out the release temp, Marc. I called the TB folks and asked. I was removing a diseased hickory backing from an osage stave. It worked but was not that easy to do. I was using a wood chisel and a heat gun. Once I got one end to pry loose it came a bit easier.