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Author Topic: Glue creep?  (Read 12311 times)

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Offline Apex Predator

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Glue creep?
« on: May 19, 2008, 09:25:01 pm »
I have been having trouble with my glue lines on tips and handles.  The fit is always good or I won't glue it up.  I have had this problem with TB III on handles and epoxy on tip overlays.  When the bow is finished and shot I notice the seams seem to expand or something.  Nothing has let loose yet, but it looks bad.  I started using CA gel for all my tips and have had no more troubles.  All my grips start to do this though.  Even with power lams, or good built up islands under my handles.  My limbs are fine.  These joints are all but invisible until have finished the bow and shoot them quite a bit.  Maybe I should shoot them more before final sanding, and these will be sanded out?  Check out this photo and tell me what you think my problem could be.

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Offline Dano

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Re: Glue creep?
« Reply #1 on: May 19, 2008, 09:47:31 pm »
Looks to me like the limbs are bending into the fades.
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Nevada

Offline Justin Snyder

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Re: Glue creep?
« Reply #2 on: May 19, 2008, 10:04:16 pm »
It would be really nice to see how thick the handle is from the side.  I actually wonder if it is slipping or just changing colors. What does the fade look like on the other limb.  It might be that your finish is soaking into the water based TB and causing it to expand right on the edge.  Justin
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SW Utah

Offline Gordon

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Re: Glue creep?
« Reply #3 on: May 19, 2008, 10:20:14 pm »
That usually means the fades are bending slightly - it doesn't take much.
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Gordon

Offline Apex Predator

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Re: Glue creep?
« Reply #4 on: May 19, 2008, 11:06:04 pm »
This is only happening in my ipe-ipe joints, and in areas that aren't bending.  Only appears after finishing and shooting.  You can feel the joint.  All my other joints are fine, including ipe-boo, ipe-red oak, ipe-mahogany, and ipe-hickory.

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Offline Dano

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Re: Glue creep?
« Reply #5 on: May 19, 2008, 11:44:05 pm »
Are you using TBIII for the entire glue up or just the handle?
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Nevada

Offline Apex Predator

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Re: Glue creep?
« Reply #6 on: May 20, 2008, 12:04:19 am »
TB III for all except overlays, which I have started using CA Gel.  I have had tip overlays do the same thing with epoxy.
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Offline Dano

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Re: Glue creep?
« Reply #7 on: May 20, 2008, 12:43:55 am »
You should feel the same kinda creep or glue line at the other glue lines too then, Not real sure but I think it's moisture, I used to get the same thing In Illinois with a HBO I built, didn't affect the bow any just felt like the glue was squezing out. Out here where the humidity is just above 10% today that same bow is fine, you can't feel a thing.
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Nevada

Offline Badger

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Re: Glue creep?
« Reply #8 on: May 20, 2008, 01:11:57 am »
I agree with the eraly answers, it is just bending into the fade and the ipe is just too rigid to bend with it. Steve
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Offline Justin Snyder

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Re: Glue creep?
« Reply #9 on: May 20, 2008, 02:26:47 am »
As much thicker as it is, and with a power lam, I cant hardly imagine it bending there.  How long did youlet the glue cure and how hot was it when you were shooting.   Justin
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SW Utah

Offline Apex Predator

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Re: Glue creep?
« Reply #10 on: May 20, 2008, 12:29:14 pm »
I never stress TB 3 joints for at least 24 hours, and usually 48.  It has been mid 80s during the day.
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Offline Ryano

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Re: Glue creep?
« Reply #11 on: May 20, 2008, 12:45:38 pm »
I would say you wood wasnt quite at the same moisture level when you glued it up. Wood expands and contracts with the humidity/moisture level.
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Offline mullet

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Re: Glue creep?
« Reply #12 on: May 20, 2008, 09:49:05 pm »
  I'd say if it is only happening with Ipe/Ipe joints, that the oils are coming out with the humidity and pushing the glue out. I've had TB3 have a fine skim that was trapped without air actually not set up when glueing oily wood that wasn't degreased real good.
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Offline Jesse

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Re: Glue creep?
« Reply #13 on: May 21, 2008, 02:19:25 am »
I have had the same thing happen in non bending areas on a  bow and on a knife handle. It turned out to be a bad batch of epoxy. Have not had it with t b yet.
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Offline Apex Predator

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Re: Glue creep?
« Reply #14 on: May 21, 2008, 08:53:14 am »
I'm gonna try to de-grease the next ipe I use.
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