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  #1  
Old 02-27-2022, 09:49 PM
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Default Glue for 3D printed parts

What is a good glue to use to attach 3D printed fins to cardboard body tubing?
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  #2  
Old 02-28-2022, 12:57 AM
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CA or Epoxy.
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Old 02-28-2022, 06:50 AM
PaulK PaulK is offline
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I use medium CA.
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Old 04-19-2022, 09:47 AM
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Do you still fillet joints with 3d printed parts, and if so, with what (epoxy again?)
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  #5  
Old 04-19-2022, 06:05 PM
L3Excalibur L3Excalibur is offline
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Quote:
Originally Posted by EamonnMR
Do you still fillet joints with 3d printed parts, and if so, with what (epoxy again?)

Use epoxy for fillets, not CA. You can get a much smoother , more even fillets with epoxy.
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Old 04-20-2022, 07:26 AM
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CA or epoxy. I’ve yet to find a nuclear option that will “weld” 3D printed parts, but I’m still looking.
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Old 04-20-2022, 11:36 AM
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It isn't cheap at $13 for 5 oz, but I've had great results using SCIGRIP 16 for gluing PETG prints together:
https://www.amazon.com/SCIGRIP-1031...-Cement-Low-VOC
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Old 04-26-2022, 06:43 PM
Bluegrass Rocket Bluegrass Rocket is offline
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Beacon Fabri-Tac or BSI Plastic-Cure (a CA formulated for plastic and wood).
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  #9  
Old 04-26-2022, 06:51 PM
Bob Austin Bob Austin is offline
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Over at Adafruit, they have a video on 6 different methods to join 3D printed parts. In the end, they found that "3D Gloop" worked best. As always, YMMV.


https://blog.adafruit.com/2022/04/2...parts-together/
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  #10  
Old 04-27-2022, 12:25 AM
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Talk about timing! I just received 3D printed fins for my very old Maxi Honest John. My first order from Boyce Aerospace. Very nice! My Maxi HoJo never flew. I shredded the vacuformed fins off of it with a rasp about 25 years ago.

I decided to use epoxy.

I did a bit of sanding along the root edge, just to make sure the fit was good. I used 5 minute epoxy, since I wanted a fast bond. The bond was very solid on all fins 24 hours later. I heated one fin a bit with heat gun to soften it enough to straighten it a tiny bit to get it perpendicular to the plastic fin can.
Today I started applying fillets. I used 30 minute epoxy since I prefer it for bond strength, plus it has time to flow out before setting up. I always add a few drops of DNA for fillets to thin it so it flows well. I like minimal fillets — enough to flow into the joint and also level out a bit.

I will likely just use filler-primer to eliminate the minute texture, rather than trying to sand them perfectly smooth. I did this on Launch Lab Rocketry’s Bullitt Bobby 3D- printed nose cone.
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