Applying glue via syringe

[rslaback]

Every now and then I have a repair application come up where the best method of repair would be to inject glue or epoxy either into a small space or through a small hole and then to clamp in place as the pieces cannot be opened up.

In this particular case the rubber lamination is coming off the plywood on a SkeeBall type table. I know that wood glue injection is commonish on detail work and I have seen long nose tips for super glue but I am open to learning everything that I can about what to buy and the glue viscosities and how to ensure proper metering of the glue.

 

[dcg9381]

Every now and then I have a repair application come up where the best method of repair would be to inject glue or epoxy either into a small space or through a small hole and then to clamp in place as the pieces cannot be opened up.

I use epoxy in a syringe for "thread repair" (in wood) all the time. I simply mix it with sawdust to achieve the viscosity that I want, apply via syringe, then tape over the hole and let it dry. Epoxy can be used to some degree as "structure" or hard filler.

Cyanoacrylate (super glue) comes in all sorts of viscosities (your local hobby store will have a great selection), but I primary use it for "bonding" appropriate materials together... But because it can be so thin, it can be applied through (small) things that won't flow epoxy.

I'm not sure that either type will bond to rubber very well...

 

[mikey03]

I just used liquid nails in a m12 caulk gun to inject some glue in a gap. Set on lowest setting to let it seep in.

 

[czarins]

We do this all day long at work for high-precision manufacturing. You can get tubes set up to mount in a dispensing gun, or you can put just about anything in a standard syringe with a dispensing tip. If it's more viscous you just size up the tip. For 2 part epoxy you mix it before loading it in the syringe - the spiral mixing tips work well for this.

If it's viscous you load the syringe from the back by pulling the plunger out. It helps to hold the syringe near horizontal and put the glue on the side, so you can get the air out the tip as you push the plunger down.

The syringe is volumetric so it's pretty easy to dose a standard volume by paying attention to the graduations. If you want to get fancy you can get a metered pneumatic dispenser. We have operators who are absolute artists with epoxy.

 

[dscheidt]

If you go to somewhere like amazon, you can buy an assortment of plastic syringes with a Luer lock fitting, and and assortment of 'needles' (they're mostly blunt, not pointed, that's not a problem for glue etc, since you don't have to pierce the skin...) of various sizes, shapes, and material. They're cheap, buy some, figure out what works for you. I have a couple set up with different greases in them, so I can pretty easily put just a dab where I want it. For glue, I load them as I use them, and discard. (I clean and reuse the ones I use for wood glue). You can either **** the glue in with the syringe, or put it through the back, depending on how thick it is.

 

[toolenthusiast]

I'm not sure that either type will bond to rubber very well...

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