I’m looking for some advice on cleaning PLA off of parts (preferably without harsh, caustic chemicals.)
As I’ve worked building 3D printers, I’ve got some print heads that have piled up over time, and they’ve all been massively coated in PLA due to head crashes, spaghetti, or other reasons. Over the course of about 4 years I’ve amassed about 8-10 of these.
Is boiling these in water in order to remove all the burnt/gunked on PLA an option? Or is that only going to soften the PLA and not remove it? Is heated lye the only option here?
Am I going to have to resort to a small CNC and a flycutter to get these looking good again?
@Charles_Gagne Tried that one - plus it’s too many hours of actual labor, my boss doesn’t want me sitting at a brass wheel for 2 hours just to save a measly $5 aluminum block. The PLA doesn’t remove easily.
@Eric_Davies I’ve seen those, but a bottle of the stuff that he shows worked is $112. These blocks might add up to a total of $45 worth of aluminum. That’s not cost effective.
Looks like a bottle of lye it is. Cheap, and apparently @ 60C or so it dissolves PLA quite well.
@Stephanie_A a torch is a bad idea. I’ve tried it a couple times and it never goes well. The plastic never burns all the way off and I even wrecked a block because I heated up the metal so much that it started to deform… I’d probably uses a wire wheel or a drill with a wire brush in it.
Bead Blasting will clean it in 1 minute. You just need a small setup to run it. There was the $50.00 project in a clear plastic box on instructables last week.
@shauki I don’t care about the thread on the inside. I care about it looking clean enough for someone to use. Obviously I’ve got a bunch of taps and dies that I could use - it’s not that these are unusable, they’re just ugly.
Sometimes customers have an old print head that needs fixing and used non E3D parts. I like to ‘upgrade’ them to an E3D compatible part for free occasionally just so they can get access to E3D nozzles. The original print heads I had made used some custom chinese block that we don’t use anymore.
So getting these cleaned up and looking…not unused, but at least lightly used is the goal.