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Oh yeah, I forgot about the thing I made - secret santa christmas present, shown here installed in its final home. Made from 100% recycled RX-7 wheels.
Oh yeah, I forgot about the thing I made - secret santa christmas present, shown here installed in its final home. Made from 100% recycled RX-7 wheels.
Exactly. Lost PLA investment casting. Working on getting better to where I feel safe doing functional parts, but I think that came out pretty nice for a really early attempt.
Honestly haven't seen a reason to. The PLA burns out nice, doesn't stink, and is cheap. Done about half a dozen lost PLA investments and have yet to see any flaws that I would chalk up to the filament not burning out even on stuff with pretty thin sections - mostly just air bubbles, or learning what I need to do better on gating/runners. What I'm seeing, Moldlay might melt out at a lower temperature, but if you get PLA hot enough it just vaporizes and or burns.
My cheapass burnout kiln is an old electric oven that I crank the temperature way the hell up on. Might go faster if I disable the safety switches on the "clean" function, but after one experiment where the plaster had rather too much moisture at the time I poured the aluminum, I'm really conservative about making everything for along time beforehand.
Honestly haven't seen a reason to. The PLA burns out nice, doesn't stink, and is cheap. Done about half a dozen lost PLA investments and have yet to see any flaws that I would chalk up to the filament not burning out even on stuff with pretty thin sections - mostly just air bubbles, or learning what I need to do better on gating/runners. What I'm seeing, Moldlay might melt out at a lower temperature, but if you get PLA hot enough it just vaporizes and or burns.
My cheapass burnout kiln is an old electric oven that I crank the temperature way the hell up on. Might go faster if I disable the safety switches on the "clean" function, but after one experiment where the plaster had rather too much moisture at the time I poured the aluminum, I'm really conservative about making everything for along time beforehand.
That's exactly what I wanted to hear. Ill save my money and just use pla. Thanks!
That's exactly what I wanted to hear. Ill save my money and just use pla. Thanks!
So far my burnout schedule after investing (in home depot plaster of paris and playground sand - 1 part each and one part water by weight) has been about 8 hours at 2-300, 4ish hours at 4-500ish another 4 at "hot" (I'm using "broil" on temp and "bake" on burner selection) which is hotter than the 550 degree setting on the dial judging by the fact that the burner element goes on if I go from 550 to "broil". I'll try to throw a K-type in there next time to see how hot it is. I like to pour with the investment hot too, on the hunch that it won't crack or something.
Well, ok, to be perfectly honest, the timing actually is "start it in the morning and shut it off when I get home from work, start again in the morning the next day, text my dad to crank up the temp on my lunch break, and pour when I get home from work". The one time I wasn't conservative on time, I got a lot of steam and a lot of aluminum bubbling and spitting - it scared me enough that I don't want that happening again.
Here is a 2x72 belt grinder I've been working on for knife making. Still got a ways to go. Have to figure out the exact motor placement and get all of the pullies mounted for real, then wire it up.
I have no good explanation for why I'm working on top of a trash can.
Here is a 2x72 belt grinder I've been working on for knife making. Still got a ways to go. Have to figure out the exact motor placement and get all of the pullies mounted for real, then wire it up.
Huh. That's kinda cool, actually. Knife-making.
Originally Posted by mekilljoydammit
Oh yeah, I forgot about the thing I made - secret santa christmas present, shown here installed in its final home. Made from 100% recycled RX-7 wheels.
Does someone who doesn't suck at SolidWorks as much as I do want to create a 3d model of Turbo Kitten?
01-18-2017, 12:08 PM
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