loading

metal and silicone?

you mention that some metal can be casted in silicone. Is that possible with aluminum?


Paige Russell2 months ago

Hi!

I'm afraid aluminum has too high of a melting point for silicone molds to withstand.

There are several types of RTV silicone rubber that you can use for casting low-temperature metal/alloys like tin and pewter (SmoothOn's Mold Max 60 has the highest heat resistance that I know of at 560° F / 294° C), but RTV silicone is NOT recommended for higher melting temperature metals.

To cast aluminum, you'll need to do either sand casting or lost wax casting in a plaster mold. Here are two instructables and an online example that go over the lost wax casting process:

https://www.instructables.com/id/On-Casting-Rings-...

https://www.instructables.com/id/Lost-Wax-Casting/

http://www.cccrow.com/how-2/lostwax.html

Hope this was helpful!

-Paige

There have been a variety of aluminum casting done with PLA material used on 3D printers. Results seemingly have been phenomenal. Bismuth is a very popular low melt point metal that many uses. Best of Luck to you.