glueing caul question

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old_picker
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glueing caul question

Post by old_picker » Fri Sep 16, 2016 6:46 pm

I need to glue 4 layers of veneer to the back of a head stock.
The caul has been created and matches the curve at the head stock to neck transition pretty well. There will eventually be a carved volute similar to this one I did late last year so there is a curve that the veneer needs to fit.
Image

My question are:
Should I put some cork sheet on the surface of the caul to even out any consistencies?

Should I go the guts and do the 4 lams in one go?

thanks

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demonx
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Re: glueing caul question

Post by demonx » Fri Sep 16, 2016 8:48 pm

You'll find that with multiple layers all the glue will make the veneers want to slide around all over the place, best bet is to use pins to stop that.

The only thing I put between my clamping cauls and timber is wax paper, which helps keep your cauls clean for future use and easy clean up

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kiwigeo
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Re: glueing caul question

Post by kiwigeo » Fri Sep 16, 2016 8:56 pm

I use cork sheet on all my cauls as well as baking paper between the cork and the veneer. I also use epoxy glue for any veneer work. Location pins are standard practice with me too...
Martin

old_picker
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Re: glueing caul question

Post by old_picker » Fri Sep 16, 2016 10:52 pm

I've used staples shot in from a hand powered staple gun and nipped off with pinchers leaving tiny little teeth to hold things from sliding.
Whenever I've done it though I've wondered about them rusting and staining the veneer after a few years.

It's been my practice to use titebond. Using epoxy as Martin suggests will definitely keep moisture out of the equation.

What do you blokes use for pins btw?

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demonx
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Re: glueing caul question

Post by demonx » Sat Sep 17, 2016 6:57 am

old_picker wrote:
What do you blokes use for pins btw?
I've heard of people using dowel, ive heard of people using solid plastic tube.

I myself just tap a nail into a pre drilled hole and then pull them out as soon as the clamps are tight.

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slowlearner
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Re: glueing caul question

Post by slowlearner » Sat Sep 17, 2016 8:43 am

I've used toothpicks for pins. They work reasonably well.
Pete

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