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Possible rair of open glue lines with vacuum bag?

3/13/24       
Ian

Hi, we have quite a bit of dimensional stock with multiple plys, and some of the glue lines are failing for whatever reason. Would it be possible to repair them by using a vacuum bag to fill the seams?


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3/13/24       #2: Possible rair of open glue lines wi ...
Tom Gardiner

I don't see a way to use a vacuum bag to "repair" the seams. You know the only way is to recut and glue again. The wide rings of the right boards are an indication of wood prone to move a lot with moisture change.
Epoxy will fill and create a strong joint in the gaps. I could see using waxed acrylic pieces and low air pressure to force the epoxy down into the gaps but it would be messy and I think it would be just as effective to use slow curing low viscosity epoxy pooled over the gaps. Heat it gently with a hot air gun to lower the viscosity more and speed the cure.
But really cut them apart and try again.

3/13/24       #3: Possible rair of open glue lines wi ...
Dave Edgerton  Member

If 2 joints failed the rest just might fail as well. Recut and reglue, agreed. Why did they fail?
Not enough glue
Too muchopen time
Wrong glue
Too cold
Not a a fresh cut
Too much pressure
Moisture not consitsten in boards.


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