Acetone bath

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Capt. John
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Acetone bath

Post by Capt. John » Fri Sep 19, 2014 5:25 am

Has anyone used the heated build bed to warm acetone for a bath where the model
is suspended above the acetone letting the fumes fuse, or melt away the print layering?
Capt. John
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jsc
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Re: Acetone bath

Post by jsc » Fri Sep 19, 2014 3:32 pm


Lateralg
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Re: Acetone bath

Post by Lateralg » Sun Sep 21, 2014 5:26 pm

I recently read of cold vapor smoothing. Placing model in closed container with liquid Acetone, then just waiting ... maybe hours. Seems more controllable.
Gary
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jsc
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Re: Acetone bath

Post by jsc » Sun Sep 21, 2014 7:40 pm

Do you have any more details? Seems to me like you'd need some sort of ventilation. Acetone vapor is heavier than air, so will settle to the bottom. Even with the heat, you want to make sure your model is fully under the vapor line or the bottom will melt before the top gets any smoothing action.

Lateralg
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Re: Acetone bath

Post by Lateralg » Mon Sep 22, 2014 4:02 pm

Sorry, don't remember where I read it. Maybe Acetone vapor combines with air ??
Gary
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jsc
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Re: Acetone bath

Post by jsc » Tue Sep 23, 2014 6:21 pm

So, are you going to try it, Captain John? Some quick notes, probably duplicative of that old thread:

Get a very large glass jar with a lid, that will fit on the bed under the gantry.
You need some sort of platform, which you can easily put in and remove. I played around with a PLA printed platform with threads to raise and lower, but didn't follow through. You don't want condensed acetone pooling at the base of the model, so maybe something with stand offs.
Temp: 100C on the bed. You can see the vapor line rising on the side of the jar, you want it to be high enough to submerse your entire model. Adjust the temperature to raise or lower the line.
Only put in your model after the line is high enough, or you will get too much melting on the bottom vs the top. Remove the model when it is sufficiently smoothed. The vapor is hot, though not scalding, so wear gloves or use a rigging of some sort.

It is denser than air, so you should have very little escaping the jar; you should not be able to smell it at any point. You can recover most of it after it condenses down after removing the heat.

Acetone vapor is highly explosive. Just FYI.

All of the above is for educational/entertainment purposes only. If you suffer burns or damage, don't sue me.

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