Which is to say, not very far on this at all but I think I have a good idea on how have my cake and eat it too for desiccant for my spools.
I am finding I can’t get the humidity below about 50% in my AMS and the silica I am using needs constant refreshing.
Well it seems there is stuff called activated alumina that is pretty good and honestly about the same costs as silica beads, but I need to be able to put it in the oven to refresh it. Which doesn’t work well with my 3d printed desiccant holders.
Insert, cheap tea strainers.
It seems I can get ones that are 4cm in width by 6cm in height that are made out of stainless steel that I can actually put straight in the oven.
So, I am working on getting the parts and items but was wondering if anyone else has done this or have any suggestions before I start grabbing stuff?
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I bought one of these Micro-Dehumidifier modules earlier this year I’ve been meaning to use in a dry-box I need to finish (got busy, forgot about it). Allegedly solid results without the need for desiccant and there’s an AMS mounting solution. They’re pricey but might be something to look at.
Man I always forget the comma in Europe and when you warned me about pricey I almost had a heart attack from what I thought that cost for a second there.
That’s actually pretty cool. Probably not unreasonable for what it says it passes for flow rate too but I think I was looking for a bit lazier a hack. I am not always to be trusted cutting things open and wiring electrics.
I used to use those mesh strainers for hops when I was still brewing beer. I would use them for desiccant drying too, but I don’t think my oven maintains low temperatures well enough to not melt the beads.
I got a food dehydrator instead which I think would work with your 3D printed desiccant holders if you make them out of the right materials.
but I don’t think my oven maintains low temperatures well enough to not melt the beads.
You must have a pretty insane oven there, because silica dioxide (which is what they’re made of) melts at 1700°C (3100°F)
It’s actually a portal to Hell.
Yeah I have a spool dehydrator but it doesn’t battle the constant humidity and trying to swap the 2 that it can hold to the 4 in the ams is a pain if I am trying to dry desiccant too.
The whole point is the alumina isn’t gonna melt or have any issues with the lower heat than it fully wants to dehydrate again. It technically should be refreshed in a kiln.
I’m not sure, but you should be careful while handling this stuff. It seems like it’s hazardous - the dust it produces in particular. You’re not supposed to handle it without gloves. I also can’t find any info about drying it out safely if the dust it produces isn’t supposed to be breathed in.
Maybe you’ve done this research already, and I’m overthinking this, but whatever you wind up doing, just be safe.
https://www.vanairsystems.com/wp-content/uploads/2019/03/activated-alumina-msds-sheet.pdf
Way over thinking it. It’s not hazardous it even says it’s stable and non hazardous in the document you provided and can even be disposed of exactly like any other non flammable trash when done.
It’s a desiccant so it’s an irritant cause it can dry your skin or eyes. And it’s a very strong desiccant that absorbs water very well.
Silica actually has the same warning about washing your skin and avoiding dust. Same reasons just one is slightly better at it.
Activated Alumina is actually already used in lots of things you may interact with like industrial water filters or whole house ones, it’s used to clean cannabis and vape oil, and it’s even used in prosthetics.
You are way overthinking it. Like California putting a cancer warning on chocolate cause you can technically eat too much of it.
@Krauerking @PlasticExistence they’ll have subtly different drying profiles. Silica gel had a higher capacity but will maintain a generally higher relative humidity. Check the graph here out https://www.impakcorporation.com/desiccants
Activated alumina doesn’t appear to be as effective as molecular sieve at low humidity from a lit. search.You should check for air leaks in the system first. When I lose Desiccant this is usually why.
P. S. Silica gel can be regenerated.
The alumina can be regenerated as well.
I am going for the activated alumina because of the different drying profile and it’s much more hygroscopic nature. As of now I can’t get the humidity low enough from the general humidity of room to be anywhere near the level of dry recommended for TPU and PETG which I am having some issues with.
I think it’s just from opening and closing the AMS in a relatively high humidity environment. It stays consistent once it settles but is saturated to green quickly by it.
I don’t know if it’s that it was cheap and less effective or whatever but my experience has been middling and I’m willing to try something else.
Plus the idea of having the desiccant in a container I can throw directly in the oven to more quickly handle the refresh seems like a better idea than the act of removing the desiccant each time to try and regenerate it.
I don’t know anything, but I do have an oven.
Can you use a cookie sheet? Spread the desiccant out on it, then store it in a glass jar after cooling? Use an old cookie sheet, and maybe never cook food on it again.
Oh I could, it’s actually not exactly toxic. Its just aluminum, in fact it’s used as a water purifier mostly. It’s kinda absorbent to everything but holds 30% it’s weight in moisture.
I just figured I’m being clever and if I’m buying 1 thing I can maybe buy 2 and save me some heartache later.
Also cause the tea strainer is like $3 and feels like a fun way to keep them together.
Why does your silica need constant refreshing? Has it always been that way? Perhaps you have a moist reel or two in there that need a good cook off in a filament dryer. I would look for more root cause for the humidity issue rather than hope another desicant will be a Gosend. Silica is pretty good stuff, I think you may end up dissapointed with this strategy.
Probably got a wet filament but they are all new and I have tried to give them a quick run through the dehydrator I have which is part of the goal of getting a better desiccant.
Also it’s like 80% humidity where it prints so at 45% it’s not a small amount reduced.
Also, silica is fine but there are other desiccants. Holding onto the past cause it’s good enough never explores if there is something better.
Thought you were joking with the title but if you’re really a Trump type thinker go for it.
Quick run through is no way to dry out a wet filament. Try all the new stuff you want and report back but doing things properly still works better.
Fuck Trump
Speaking as a Mod: What is the deal with the Trump comment? That seems uncalled for and random IMO but perhaps I do not understand. I have no issue with your opinion of Trump. I’m wondering why you are accusing someone else of being a “Trump like thinker” that is a pretty hot jab to wield randomly without context.
“concept of a plan” is a trump quote. Not random at all
Sure and we all used covfefe as a meme for a while too.
If we don’t laugh we will cry.
But still an absolute insult to jump to just cause I don’t do things how you want them to be.
I was joking. I have barely started on this and thought it was funny. Why rush to insult for nothing?
And I don’t care to share any of my findings with you if you downvote conversation and jump to insults.
