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Author Topic: bad glue lines  (Read 2933 times)

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Offline Deerhunter21

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bad glue lines
« on: April 19, 2020, 04:53:07 pm »
so i glued on my first tip overlay. i did ok on flattening the tip without a belt sander but one sides glue line isn't too good. i put CA glue in it. Do i just wish for the best?
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Offline Gordon

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Re: bad glue lines
« Reply #1 on: April 19, 2020, 05:29:17 pm »
I wouldn't take a chance like that with tips. If a tip came off while shooting an arrow you could break the bow. You don't need a belt sander to flatten surfaces. I hand flatten using sandpaper over a flat block of wood.
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Gordon

Offline osage outlaw

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Re: bad glue lines
« Reply #2 on: April 19, 2020, 05:42:35 pm »
You need to get both surfaces matching almost perfect.  I hold the overlay in place and hold it up to a light.  If there is any gap you will see light through it.
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Offline Deerhunter21

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Re: bad glue lines
« Reply #3 on: April 19, 2020, 06:08:46 pm »
ok, how do i take the tip off?
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Offline Hamish

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Re: bad glue lines
« Reply #4 on: April 19, 2020, 06:12:40 pm »
Acetone. You could try wiping it on, in copious amounts. If that doesn't work, you could poor some in a jar and put the tip in there, checking after a while to see if it loosens(5 mins), gently work an artists palette knife into the crack, re soak, until it comes off.
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Offline Gordon

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Re: bad glue lines
« Reply #5 on: April 19, 2020, 06:26:42 pm »
Or, if necessary, grind/rasp the tip overlay off and start over.
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Gordon

Offline Deerhunter21

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Re: bad glue lines
« Reply #6 on: April 19, 2020, 06:30:23 pm »
So this isn’t ok?
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Offline Gordon

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Re: bad glue lines
« Reply #7 on: April 19, 2020, 06:45:00 pm »
No, that is not okay. Eventually that glue line will fail and you will lose the bow.
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Gordon

Offline DC

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Re: bad glue lines
« Reply #8 on: April 19, 2020, 07:59:14 pm »
Make up a sanding stick. Nice flat 2"wide board about 10" long. Double sided tape and 80 grit paper
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Offline Deerhunter21

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Re: bad glue lines
« Reply #9 on: April 19, 2020, 08:02:44 pm »
ok. shouldnt have shaped it to the tip already i guess. but whatcha gonna do.
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Offline Deerhunter21

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Re: bad glue lines
« Reply #10 on: April 19, 2020, 09:09:52 pm »
think i got it. now to let it set.
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Offline Weylin

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Re: bad glue lines
« Reply #11 on: April 19, 2020, 09:54:26 pm »
just rasp that off and start over. Like these guys said, the mate needs to be perfect. I often do it with hand tools. Gordon has a good idea with the sanding block.
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Offline osage outlaw

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Re: bad glue lines
« Reply #12 on: April 19, 2020, 10:02:54 pm »
I struggled with getting the two surfaces matching when I first started using overlays.  Now it just takes me a couple of minutes on the belt sander.  Keep at it.
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bownarra

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Re: bad glue lines
« Reply #13 on: April 20, 2020, 12:29:34 am »
Water is your friend when checking mating surfaces :)
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Offline Dances with squirrels

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Re: bad glue lines
« Reply #14 on: April 20, 2020, 06:05:24 am »
I flatten them with a belt sander, assure a great fit, then run a toothing plane blade, just the blade, held like a card scraper, down both surfaces lengthwise. The grooves ensure the joint wont be starved,(I use Smooth On epoxy) and since the toothing plane blade edge is shaped/sharpened very slightly convex, the glue joints along the edges are perrrrrrrfect... every time.
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