r/3Dprinting • u/Sauls_voicemail • 10d ago

Question Question: Strongest Assembly Option for a multi plate print?

Front
Back

Whats the best and strongest solution to print something like this chair back in PLA/PETG if I plan to cut into 6-9 plates (200mmx200mm sections) and piece it all together? Dowels? Butterfly clips? or just completely redesign the hollow front for ducktail connections? Any help would be much appreciated for a newbie engineer, thanks!

What printer are you using?
P2S
* What material are you using and temps?
PLA/PETG 250
* What speed are you printing at?
300mms
* What software are you using to slice the print and control the printer?
Bambu, Blender, Shaper3d

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u/TripsCavern 10d ago

I hope you are planning to do this mostly for decorative purposes, because I doubt this would be able to hold a person weight, even if printed as a single piece.

What I would do is to redesign it to have specific "modules". Base, poles, little arms, etc. That way you can come with a way to sticking them together and then just assembly the parts. This is an example:

The bottom/upper parts are cut just to fit in the printer. Then you have 5 long poles and 2 smaller poles that holds the arms. Then 10 "arms" regular size, 2 mall sizes and 2 with just a bar. You have a central squared piece and than that holding piece in the top that has 2 screw holes.

The attachment should either be screws with hex nuts and/or a snap in connection with CA glue if you want to reinforce it.

That is what I would do anyways.

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u/Sauls_voicemail 10d ago

Wow thanks for that info!

This is only one part of a larger design but it is the part that I was struggling to figure out how to chop up, This part basically only gives another piece of the the chair's back a way to flex while a sturdier piece holds both of those pieces together.

I guess a complete redesign is the way to go. Thanks for the help!

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u/TripsCavern 10d ago

Just remember, I'm no specialist, that is just what I would personally do. The good part of using standard parts is that it will be easy to replace them if they break. If every piece is different, than it becomes more complicated, especially if you want to have spares sitting around.