Gluing problems.

[Guillaume Saucier]

Allo everyone,
Am I crazy, or gluing laser cut pieces is hard because the glue does not stick well on the laser burnt cut?
I'm building a frame right now, it's not the first one, but I keep seeing jointed parts separate?
Help anyone?

 

[KAYA61]

hello. Could you please add a picture as an example?

 

[Corsair]

On the kit I'm building I'm sanding off the char where the glue would join the pieces.
Of course, care must be taken to minimize changing the shape of the pieces.

 

[KAYA61]

@Corsair, I also sand down the burn marks and glue them on after I get a smooth surface.

 

[Guillaume Saucier]

Thing is, the burn marks are in a zigzag joint which is already loose, so it's hard to sand AND will increase the looseness...

 

[Dave Stevens (Lumberyard)]

what type of glue are you using?

 

[Guillaume Saucier]

what type of glue are you using?

Lepage Yellow carpenter's glue. It's super strong. The problem is the zigzag joint. I will put a piece of flat wood over those joints to make sure, but the gluing problems annoying. the joint is literally brittle....

 

[Corsair]

use needle files in the joint. You will find the triangular file to fit great most likely.
The other option would be to glue some scrap on the outside, overlapping the joint.

 

[Guillaume Saucier]

use needle files in the joint. You will find the triangular file to fit great most likely.
The other option would be to glue some scrap on the outside, overlapping the joint.

I will do that, I'm a bit maniac as far as frame straight is concerned.....

 

[Dave Stevens (Lumberyard)]

there is a thread here on SoS that tested different glues

Test of Different Glues on Differing Surfaces

In preparation for assembly of my Bonhomme Richard cross section, I am looking at different types of finishes (in particular Wipe-On Ply varnish and wipe-on Danish Oil). I'd love it if you would stop by there (Signet's Bonhomme Richard Cross Section). Since I've been told to never glue to a...

shipsofscale.com

 

[Guillaume Saucier]

there is a thread here on SoS that tested different glues

Test of Different Glues on Differing Surfaces

In preparation for assembly of my Bonhomme Richard cross section, I am looking at different types of finishes (in particular Wipe-On Ply varnish and wipe-on Danish Oil). I'd love it if you would stop by there (Signet's Bonhomme Richard Cross Section). Since I've been told to never glue to a...

shipsofscale.com

Thanks a lot!!

 

[Rob444]

In my experience it is not necessary to get all the char off. Just a light sanding or filing as Corsair suggested will often be enough to get a good join without distorting the parts.

Welcome aboard from Connecticut!

Rob