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jes / 3d-metal-printing

Notes and information about 3d metal printing
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Attempt 8: M10 bolt, bronze PLA, aluminium #12

Open jes opened 4 years ago

jes commented 4 years ago

Same as in #9, but peaking at 865 instead of 700, so as to sinter the bronze from the print.

Just curious what will happen.

Ideal case is we get good surface detail from the bronze, and good fill in the centre from the aluminium.

jes commented 4 years ago

Aluminium left over from #9 glued to bronze PLA M10 bolt.

image

jes commented 4 years ago

Not the same temperature profile as #9, instead:

  1. Ramp 150 2h00m
  2. Hold 3h00m
  3. Ramp 400 4h00m
  4. Ramp 865 3h00m
  5. Hold 4h00m
  6. Heater off

This will take 16 hours in total. It's a combination of the slower plaster-drying part used in #9 and the sintering profile suggested by https://www.thevirtualfoundry.com/help

jes commented 4 years ago

Furnace is armed and ready, I intend to chuck the flask in tonight after it's dried out a bit and let it go overnight again.

Need to remember to flip the flask upside down.

jes commented 4 years ago

This is what we got. The bronze is missing in places, and where it's missing the aluminium hasn't filled all the way out to the edge. The aluminium (at the top, at least) seems to be very porous, possibly it didn't like being so hot for so long.

It looks like the mould had an air bubble in it underneath the head of the bolt, which is surprising because I wobbled the wet plaster around a bit to make sure it dislodged air. Obviously not well enough.

And the surface quality is poor and warped, even where there is bronze.

It weighs 15 grams.

image

jes commented 4 years ago

I pulled on it hard to see what would happen, and the head broke off. The aluminium has not really stuck to the bronze at all.