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Old 07-01-2013, 03:51 AM   #1
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Default lost pla casting

Well I decided to try my hand at the lost pla casting. PLA is a plastic that is used for printing on 3d printers. Imagine designing something in your cad program, printing it, then investment casting it into a metal part
This run didnt come out that well but I did learn a few new tricks, and I know the next run will come out 100 times better.



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Old 07-01-2013, 06:33 AM   #2
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Now that looks interesting.



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Old 07-01-2013, 11:15 AM   #3
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Did you bake out the PLA like lost wax or displace it like lost foam?

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Old 07-01-2013, 02:28 PM   #4
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Quote:
Originally Posted by Lakc View Post
Did you bake out the PLA like lost wax or displace it like lost foam?
It was baked out in the kiln all day up to 730C, I needed to burn it out for a few more hours there was still some stuff in the molds that left inclusions in the castings. This was a good learning experience.
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Old 07-01-2013, 04:38 PM   #5
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heres a pic of the iron part, the surface finish isnt that great but im certain that if the right investment is used it will come out much much better...

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Old 07-01-2013, 05:58 PM   #6
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aone, very interesting.

Thinking about it, why not print a mold of the part and pour in wax, then make your investment mold from the wax?

Also, what kind of plaster did you use? I have been interested in investment casting with bronze for a while now, but haven't jumped in yet.

Just did a bronze/petrobond pour today.

maury
www.lonestarengineworks.com

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Old 07-01-2013, 06:06 PM   #7
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Maury, thats in the works as well. The one part is a mold (printed in abs) for wax injection. I need to get a few things worked out but I feel there is real potential here. The investment was Americast from Ranson and Randolph. I plan on ordering some Kerr Platinite for the next iron cast. Here is a couple pics of the printed wax molds and the casting. Not 100% yet but the next pour will be better.

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Old 07-01-2013, 06:08 PM   #8
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On a side note, abs printed core boxes could save alot of time for sand cast items

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Old 07-01-2013, 07:42 PM   #9
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aonemarine,

man you have almost convinced me to take up casting. if i could squeeze 30 more seconds in a day i would make time to do it. It looks like your retaining wall really helps with your work. would you recommend having a stone table or something to replace the retaining wall. sort of a casting work bench?

excluding the 3d printing and mould making, from the moment you decided to make the pour, how long did it take? i mean the actual pour. from getting your already made moulds together, putting on your gear, so on so on. is one pour basically a day project or can you knock it out in a few hours?

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Old 07-01-2013, 08:22 PM   #10
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Great effort. As they say " practice makes perfect" and it looks like you're well on the way



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