Hey guys,
I'm currently working on my first bottom-up DLP and as I already have an UM2 here I wanted to print as many parts as possible to save on costs (and hopefully time).
My plan for the VAT so far is working with a sheet of tensioned FEP. What i'm obviously curious about is wether the combination of PLA and resin would be a bad idea or not as I'd like to print the whole thing (except for the bottom of course). Will one of the materials react with the other? Will the PLA just degrade and start to leak?
I'll probably need quite thick walls to make sure everything is rigid enough, but that's the last thing I'm worried about at this point.
If the resin doesn't like the PLA would Nylon work instead? Or could I possibly seal the PLA with polyurethane or something?
I don't have any resin here yet to test it myself as the whole build is still weeks or months away (mostly a budget question), so if someone already has experience regarding PLA parts that are exposed to resin I'd be more than grateful to get some insight
Printing a PLA VAT - horrbile idea?
-
- Posts: 63
- Joined: Wed Feb 19, 2014 4:23 am [phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1266: count(): Parameter must be an array or an object that implements Countable
Re: Printing a PLA VAT - horrbile idea?
PLA holds up just fine when exposed to resin, the real issues would be the porosity of the printed parts, and if they could stand the tension without cracking.
-
- Posts: 30
- Joined: Sat Aug 16, 2014 10:32 am
- Location: Berlin, Germany [phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1266: count(): Parameter must be an array or an object that implements Countable
Re: Printing a PLA VAT - horrbile idea?
Thanks for the input!
In regards to the porosity; do you mean the parts that are in contact with resin could absorb resin (or worse) or were you refering to the structural strength in general?
In regards to the porosity; do you mean the parts that are in contact with resin could absorb resin (or worse) or were you refering to the structural strength in general?
-
- Posts: 63
- Joined: Wed Feb 19, 2014 4:23 am [phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1266: count(): Parameter must be an array or an object that implements Countable
Re: Printing a PLA VAT - horrbile idea?
I'd be worried about the vat itself absorbing resin over time.
-
- Posts: 41
- Joined: Sun May 18, 2014 10:33 pm [phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1266: count(): Parameter must be an array or an object that implements Countable
Re: Printing a PLA VAT - horrbile idea?
As an Idea, would coating the printed part with caulking silicon be ok? I would assume that it should be fine since that seems to be what a lot of people are using for joining glass vats together with, but if there is some chemist out there that could confirm, that'd be great!
-
- Posts: 30
- Joined: Sat Aug 16, 2014 10:32 am
- Location: Berlin, Germany [phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1266: count(): Parameter must be an array or an object that implements Countable
Re: Printing a PLA VAT - horrbile idea?
I think the surface wouldn't be smooth enough, leaving thousands of places for resin to settle, but I'd give polyurethane coating a try. Or will that cause a problem with the resin later?
-
- Posts: 30
- Joined: Sat Aug 16, 2014 10:32 am
- Location: Berlin, Germany [phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1266: count(): Parameter must be an array or an object that implements Countable
Re: Printing a PLA VAT - horrbile idea?
I'd assume that silicone will get porous over time, plus silicone tends to only completely adhere to more silicone so there's always the danger of damaging it or scrubbing it off, but I guess both options would work. Will probably give both a try.