Glueing PLA to PLA? What's a good, strong, adhexive for pla?

3D Printing
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Glueing PLA to PLA? What’s a good, strong, adhexive for pla? It’d help me bootstrap my printer until I get a replacement for a broken part, and I could see needing it to do pultipart prints in the future…

(and thanks again y’all for your amazing, free, support!)

2

I use two part epoxy resin.

3

Anything specific? (I’ve got some 5 minute stuff and some JB Weld in the garage)

4

I use Araldite, but that may be UK specific.

5

Any good Cyanoacrylate adhesive works well, but what works best is welding it with heat and more pla.

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I’ve had mixed results with cyanoacrylate.

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I wonder if silicone caulking would be a good choice. It doesn’t have as strong of bond strength as JB weld or CA glue, but the flexibility may make it a more durable bond if the pieces flex.

I haven’t tried this so I could be completely wrong here.

8

Ca is want I have used. I highly recommend pinning, for that you make 2 holes that mate up and glue a rod in to assure a tight fit, if you design the holes to be the diameter odd your filament it works great

9

I’ve found CA (in other uses) to not be very strong, the pinning is a great idea, I may combine it with epoxy…an inadequate bond will leave me high and dry til I get a replacement j-head mount otherwise.

10

Pinning makes the bond much stronger (The CA has a very high tensile strength bond, but a week shear strength) by pinning the part you improve the shear strength allot.

11

Araldite is a winner. 5 minute stuff would probably still be stronger than the pla. As @Camerin_hahn suggests, pinning with a screw or similar can help. I’ve also used thin brass rod, heated then pushed into the broken parts to reinforce components after gluing.

12

I found that others recommended Tensol. I bought 50ml TENSOL 12 Bottle ACRYLIC Perspex Bonding Cement from eBay and it is brilliant stuff. Dissolves the PLA and then bonds it with cyanoacrylate.

13

I put a small length of PLA in my dremel then run it at full speed and friction weld the parts together.

14

I’ve had good results with cyanoacrylate, but only when gluing the bases (the flat part in contact with the kapton or blue-tape platform, not a top or side surface). Put a drop on one of the two surfaces, press the other, and move them in small circles to spread the glue. This will spread it into a thin enough layer that it will become tacky and set in seconds.