Post by: Brian from GA on December 10, 2019, 12:51:42 AM
Brian
Post by: Crooked Stic on December 10, 2019, 05:34:19 AM
Post by: Forwardhandle on December 10, 2019, 07:25:59 AM
Post by: Roy from Pa on December 10, 2019, 08:02:00 AM
Post by: Mad Max on December 10, 2019, 08:42:28 AM
Post by: Eric Krewson on December 10, 2019, 09:15:13 AM
It is unlikely you have Tonkin cane for backing, the real stuff doesn't get much bigger around than 3", too small for bow backing.
I never heard that TB wouldn't cure under pressure, are you sure? I glue blocks of wood together with TB all the time, tightly clamped.
Post by: Mad Max on December 10, 2019, 10:17:38 AM
Post by: KenH on December 10, 2019, 11:57:54 AM
Post by: Pat B on December 10, 2019, 12:01:13 PM
Post by: Eric Krewson on December 10, 2019, 12:31:37 PM
I make clamp pads out of scrap bamboo that conform to the oval shape of the bamboo back.
Post by: Eric Krewson on December 10, 2019, 12:37:27 PM
My glue lines, handle pieces and bamboo;
Post by: Brian from GA on December 10, 2019, 04:59:07 PM
. I found this out the hard way. Delamination of my first glue up devistated me. I've used used c-clamps with perfect mating surfaces (planed, sanded with granite beam, then toothing planed). I'm below 1/8th inch thick with knife edges (been cut by em, OUCH!), But for some reason, even with 40 clamps or so, and blocks under the clamps, I'm having issues. I'm gonna shoot some CA in the gaps, but I just like pretty glue lines lol.
Gonna try the inner tube! Hopefully it's gonna work out.
I'll post results. I'm on 12hr night shifts this week, so it may be a few days. Thanks.(https://uploads.tapatalk-cdn.com/20191210/79a2664bb84740ef394736ad9bee83e7.jpg)
Sent from my Pixel 3 XL using Tapatalk
Post by: Brian from GA on December 10, 2019, 05:08:03 PM
Sent from my Pixel 3 XL using Tapatalk
Post by: Eric Krewson on December 10, 2019, 07:27:51 PM
The land changed hands and the new owner was giving all the bamboo away on the Facebook Marketplace and clearing the land, some was 8" in diameter. I was a day late and a dollar short but did manage to pick up a few pieces from his burn pile.
Post by: Stagmitis on December 10, 2019, 07:29:39 PM
I dont think the rescorcinol glue of yesteryear is the same as the weldwood of today. It was a fine glue and had much less creep than smooth on for wood to wood application.
I have used urac (unibond today) for the core glueup on my hill bows and smooth-on for the outer glass. Always got better performance especially with natural bamboo that wants to take a set more so than maple,cedar,elm,yew for example.
Post by: Pat B on December 10, 2019, 10:20:48 PM
Post by: Brian from GA on December 10, 2019, 10:26:11 PM
Sent from my Pixel 3 XL using Tapatalk
Post by: Flem on December 11, 2019, 10:15:26 AM
and wrap your blank with an electric blanket for a faster cure.
Post by: Pat B on December 11, 2019, 12:35:56 PM
I do this with both Weldwood and TBIII because both glues are carried with water. I haven't found that this adversely affect glue lines. I don't do many glue ups but I've always gotten better glue lines using tire tubes cut into long strips to bind the components as the glue cures. I do leaves openings in the wrap so the glue up breaths but with the Weldwood I don't think it is necessary because it cures differently from TBIII.