Oh, I’d like a phone number. Am I doing creepy customer correctly?

Coffee mommy isn’t a fetish, it’s a way of life!

I thought getting a vasectomy would make me more popular than it did. Instead I get “why are you telling me this” from the lady serving me coffee.

No notes, that’s awesome!!!

I have zero intention of getting into 3d printing or back yard casting. But it’s cool that intersection has products.

That cutter is fucking art. The blades we ran had a ceramic core. Then the wax mould over the ceramic. Lose the wax, cast, then beat the shit out of it till the ceramic comes out the blade, now there are cooling channels built into the cast. Complex geometries too.

I was asking why the blades needed a ceramic coating before going into the turbine. Surely we could just heat treat the blades to whatever hardness required.

I was then informed that inside turbines it’s so hot the Hydrocarbons split up to free Hydrogen ions and the left over. The ceramic is there because it’s a highly acidic environment.

Actually that story is my go to “how to mentor story”. I asked why we coated the blades in ceramics. The engineer told me it was really hot in there and just waited for me to twig. I didn’t, then he said it was so hot hydrocarbons break up into free hydrogen and the rest, and then waited. Then I caught on, I have no doubt if I hadn’t then he would have said “free Hydrogen is the literal definition of an acid” and waited. Then “Acid eats metals like titanium alloys” wait. “Then Acid doesn’t eat ceramics” wait. I genuinely try to lead people to answers that way just because the way he made my dumbass feel like the smartest tool in the room. Actually, I asked why we pre finished the blades to near mirrors just to acid etch them dull again, and was told it was for the ceramic coating.

Is fine. Didn’t think I’d TIL on a shitpost comm, but you sent me down a wikihole. Always fun

It was me kinda implying it. Just making a shit posting comment in a shit post community.

Just a Lemmy shitpost comment, don’t think about it too hard Sure fine sand and a runny plaster, ceramic capture detail. But you still bulk it out with rougher stuff to give the mold heft.

Maybe not cement. But I also wouldn’t recommend doing back yard casting for Life critical parts if you’re asking what your detail capturing materials should be and what your bulking out materials should be.

Those orphans aren’t orphans any more… Progress.

Real talk I cast turbine blades for IGT and Aerospace (not an engineer, just a floor worker). It was my impression that inside those turbines is an incredibly hostile environment (hot, acidic, g-forces), and still we cast them. We did some single crystal stuff for the really demanding parts. Is cast metal really that flawed?

3d print part, with added shrinkage factor Finish 3d printed part. Cast the print in cement. Burn the plastic out the new mold. Fill mold with the alloy of your choice. Pre-finish, finish metal part. Congrats, many 1000s spent on furnace materials for a 1.5k part but a new understanding for lost wax casting.

3d printing is the king of prototyping. Just print the part with sprues and all. Do a one off, write SOPs, prepare for full production. Profit.

You’re in a shitpost comm.

The joke is that men don’t know what chubby is. My joke is that men don’t know what women without makeup look like.

The girl in the left is what I mean when I say I prefer girls without makeup.