Well, this is disturbing: my resin 3D prints are melting
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- Опубліковано 11 вер 2024
- There was nasty gray sludge on the shelf, under a 3D print of a chess rook. It was not the way I wanted to end a long day.
As the video shows, one or more rooks (there are four on the shelf) either began melting or oozing very toxic resin all over my shelf. But why?
I will clearly follow this up, hopefully with better answers. Until then, if you know what caused this mess, please leave comments below. Have you every had your resin prints melt or explode? Let us know.
Looks like uncured resin from, perhaps, a part that was “solid” when printed. I don’t think your cured resin liquified or “melted.” If the part was solid you might need to put in weep holes so lots of interior resin can drain. See if the liquid stuff cures under UV light. If it does then my theory is correct.
Yeah, it's definitely uncured resin. Thanks!
You can see a drain hole, BUT physics a b****, so you should allwayshave 2 so that the IPA gets in and air out.
That's a design flaw of the test print provided by Elegoo inside the USB Stick. You can see evenly spaced dots on the bottom. I've printed mine with clear resin and I could see it more clearly that the bottom part (that looks like a base of a trophy) is hollow without draining holes and the dots on the bottom are columns (or you can say internal supports). The hole you see on the side is designed to work as draining holes for the inside of the tower (where you can see the double helix), not for the base part. I could see clear uncured resin flowing inside the base, so i drilled a hole to drain them out and let it cure under the sun. It became yellowish, but fully cured.
Did you possibly print these hollow and not put in drain holes? Uncured resin trapped inside of a print will eventually crack the cured resin and leak out all over the place. Once resin is cured it will never "uncure" it can be melted with other chemicals, but won't turn back into what you cleaned up. I would check the inside of the prints to see if they were hollow, if they were, that is your culprit. You should also check your other prints, you can shake them. If you hear a sloshing noise you have uncured resin inside and should either drill a hole somewhere in it to drain it and rinse with IPA again, or throw them out.
These were the reference prints from the vendor, so I don't know how they were sliced. The print does have a hole in the bottom so I'm guessing it's for drainage.
You don't throw uncured resin to trash, even if it's inside a print. You do the work, drill a hole, drain it and cure it or break the whole thing and cure it.
Uncure resin from the inside leaked out. You may want to check/change the uv bulb in the printer. Color resin sometimes need extra time and or stronger exposure. One of the best way to avoid this is to stay with clear resin. This happens all the time with gel nails. It is unsafe to just have uncured resin as a core. It is less structurally sound and can randomly explode. The gel nail community have some great tips
Doesn’t look like it dissolved tbh! You can see from the cross-section of the split that the model from the factory has been sliced hollow and has a drainage hole. I think it’s just that you’ve not cleaned out a few/one of them properly inside and it decided to ooze out. I know some folks like to use a syringe to get IPA in to clean and a single UV LED poked inside drainage holes to cure the inside after cleaning just to be sure. I think it’s possible you probably know all this now so ignore this if you do!
Same was my thinking.
Cured resin does not melts but tends to crack. That cause trapped, uncured resin escape from the inside.
It appears hollow and the uncured resin didn't drain out during the washing/curing steps.
After some time, for some reason, it's come out now.
Not exactly 'Melting', but still spooky.
Resin does not melt once cured; it scorches and deteriorates. The gunk is uncured resin that slowly went to the bottom
This also depends on the type of resin that you are using as well...there are resins that are marketed as good resins when in reality they are low quality resins then there are resins that are much higher quality and produce a greater print than others...I would suggest do some research on various types of resins don't get persuaded by brands try to stick to just one resin one that produces high quality prints....just because it doesn't smell it doesn't mean it's great...
I just picked up a print my brother made a year ago that was sitting on top of a plastic case I had and the whole bottom was just melted goo and it stank. This is the only thing I could find where something similar happened.
I'm starting to think there are a ton of time-bombed resin prints out there.
I came looking for answers and found this video after noticing that a printed Cthulhu one of my kids had given me, some time ago, was leaning over on the shelf where it had sat, untouched, for several months. When I examined it, I found that the limbs, arms and legs, had split open, gray goo had spilled out and run down to the base; which itself had split and started to pull apart, hence the leaning. A small puddle of the goo had been forming for who knows how long....
Yea, the wet resin inside gassed up and burst the print. Hollow print without drain hole, or covered up drain hole with wet resin still inside. Heat accelerated the gas buildup. Just a guess.
It's certainly a possibility. Makes me worry about all those prints out there (especially that kids might play with) that might have uncured resin inside.
unless everything on the shelf is resin prints and a year old, I would say that humidity in the room attached itself to the prints and interacted with the shelf material, caused it to split and maybe leaked out because otherwise, if you put a print into fresh resin will it cause it to melt? I don't think a leak would suddenly start otherwise if something didn't damage it. Essential Oils/cleaners for example can melt plastics.
you guys think that IF I do my prints completely solid with no hollow and punch, this can still happen? Anybody knows if there's anything we can cover our prints with to make it stronger?
So far, none of my solid prints have leaked. I'm also looking into how to make sure the inside of prints are cured. Some other 3D printing UA-cam channels have addressed this, so you might want to dig around.
I have had this happen and also do not know what caused it. Half the mini i printed had slid into a liquid state.
Did it happen to be water washable resin? Every single hollowed out print I've made with water washable resin, from every company I've purchased it from, has now cracked or spilt open like a flower. Sometimes it happened within a week, sometimes it was over a year later, but I stopped using that garbage for hollow prints. Some survived okay in dry, high attitude Denver, but I recently moved to humid sea level Cleveland and every surviving water washable print I brought with me split wide open over the course of my first month here. I'm done with water washable resin. Good riddance. None of the super-toxic resins have split like that, they just make me feel sick if I don't take proper precautions.
I have hear of this before or a exploding parts that didn’t have drain holes and it didn’t cure right
Was there any air pockets at d time u printed them. They tend to expand over time, and resin expands…
Just discovered a base on a mini had burst open. It stood in a dark corner of a shelf, no heat etc. I guess it was printed not fully solid and there was still liquid resin in it, that expanded over time and found a weak spot in the side.
Always have 2 drain holes^^
Put Led diodes plugged into drain holes. Should cure inside nicely
I've had 2 models do this, they both exploded like an alien egg birthing a face hugger and I don't know why. Both were solid models and neither were in particularly high heat. Both had been printed with elegoo gray water washable.
I'm freaking out - I just found a larger 75mm print I did months ago had split open and had uncured resin on the inside. I'm so worried this might happen to more - I've been using nothing but elegoo gray water washable the whole time I've been resin printing. I spent days painting this thing...
OK, I'm going to finally comment on this issue.
Having being experienced in all kinds of 3D printing including this MLSA type printing.
No. 1 Heat has absolutely nothing to do with it, this is RESIN the only thing that could effect a finished resin 3D print from heat is distortion of the print
No. 2 Uncured resin has nothing to do with it, in fact uncured resin will not effect anything INTERNALLY (incase of a hollowed 3d print or otherwise) of the 3D printed object as resin will not MELT resin cured or not
No. 3 If there was ANY Acetone residue on the shelf that the rooks were stored on, very much could be a possibility of the issue considering the amount of time it took for them to start melting. Acetone is a very potent solvent for resin, cured or not cured
No. 4 Possible contamination of the resin in the VAT with IPA, BUT IPA is most commonly a solvent for UNCURED resin, not so much for cured resin, but who knows on that one, again considering the length of amount of time they have been sitting there with potential residual IPA in them...hmmm
Conclusion: I am leaning to No. 3 on this one, most likely in this case
Hope this helps
Thanks
Jon
It's possible. No idea what HF finishes its surfaces with.
The Chinese are 'cutting' these resins worse than drug dealers cut coke in the 80's. I'm no chemist but my best guess is that it's likely a filler material used to stretch the batch - that didn't cross-link and eventually oozed out. In my experience the cheaper the resin, the worse this issue has been. But a couple of prints done with premium resins have had the issue as well.
Eek. Never thought of that.
lots of allegations here. where is your proof?
@@jenjenner8827 It's an educated guess based on working in the thermoset plastics industry most of my adult life, barrister.
@@JohnJones-oy3md So you are a published engineer who has peer reviewed articles about plastics and polymer physics. Pls let me know who you are so i can look you up and judge for myself......
this happened to me as well after a year to all the prints i made with water washable resin.. in some rare case it leaked from tiny cracks but the majority are literally exploded..
Wow.
I had the same problem with water washable (well, cracking, not so much exploding :D). Mine were prints that were mostly open too (I print anatomical skulls), no inadequately drained hollowed voids inside. I've been told the issue is uneven curing; the outside of the model is getting the most UV exposure in the curing machine, while the inside isn't being cured as quickly. I'd imagine the more closed a hollowed model is the more of an issue this becomes. (And the more difficult it is to get the model thoroughly washed and the uncured resin out of the inside.) I finally gave up on water washable altogether, my results were consistently just bad. I did make a little contraption from a UV flashlight and a bunch of strands of fiber optic filament, to get UV light into tight spaces on the interior of models for thorough curing, but to be honest I don't know how effective that little pinprick amount of light could possibly be.
How long ago was that printed ?
Please wear protective equipment when handling liquid resin.
It was printed about a year before it "melted." And I normally do. I wasn't expecting to be handling resin when I discovered this. It was just a piece sitting on shelf.
Goggles, lab coat and gloves over a resin print that didn't cure and leaked trapped IPA? How is that gross? You can't be that much of a baby. I'd be more upset my prints failed after so long (they looked great BTW) and worry about how to prevent that from happening again.
You have no idea of my capacity to be a "baby." :)
What brand of resin ?
I think it was the Elegoo resin that originally came with the printer. Not the water-soluble stuff. But I'm honestly not sure.