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Fast set up glue jig for hide glue
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Fast set up glue jig for hide glue
I’ve been trying to figure out an easy to use jig that will allow me to clamp a top and back fast, so that I can use hot hide glue. No way with my spool clamp method I could ever get everything clamped in time. I thought about trying to use pneumatic cylinders with 3D printed perimeter feet, but that seemed very complicated and a lot of work to get something to attach the pneumatic cylinders to. But it kept coming back to me that using air pressure somehow might provide the solution.
Here is what I came up with. I built a board using a full platform MDF base and then a 3″ or so perimeter centered on the perimeter of the guitar. I then routed a channel into that elevated perimeter piece that followed the 3D profile of the top/back. I made the channel the size of a cut in half bicycle tube (I used 36 mm wide, and 18 deep). The centerline of the channel tracks the perimeter of the top/back.
I fitted a bicycle tube made for an 18″ rim (circumference was almost spot on for the perimeter of an OM or 00 guitar) into the channel. Inflated to about 5 pounds and inserted. The valve projects through the bottom.
I plan to use the top or back dish for clamping from the top.
I’ll let you know how it turns out.
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5 Replies
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That’s really cool Michael!
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Dude. That looks pretty cool? Have you thought about making an arch with an ACME screw to just throw center pressure on it? Like a book binding press etc?
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I like that idea!
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That is really interesting Michael!
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Did my first glue up last night. Everything went well!
Top sits on the tube. About 5 lbs of pressure in the tube.
I hit the rim and the top with a heat gun before applying the glue. Like 4 passes on each.
Then I used a 10 ml syringe to dispense the HHG. With the cap on, I can keep it hot in the glue pot until I’m ready to go. And it is perfect for putting a thin line of glue on the linings and top, fast! Single brush stroke on the rim, and evened the glue on the neck block, and tail block. Mated the pieces and quickly put on 4 clamps. Neck, heel, and around the two upper x brace slots.
Once firmly clamped, added some more air pressure to the tube. (not sure, but maybe up to 10-15 lbs,)
I used Aspire for the modeling of the channel. If anyone uses Aspire and wants that file, PM me. I also made an STL file of the 3D channel cut. Below is a link to that.
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