I made my own SILVER COINS! - Making custom silver rounds - 3d printing to metal casting

In this video I will be casting custom fine .999 silver rounds! I designed the coins in fusion 360 and then printed them on my Elegoo Saturn resin 3d printer. I used the 3d printed models as patterns to make sand molds. The silver was melted in my homemade metal melting keg furnace. Each coin weighs between 63 and 65 grams.

Casting equipment

3d printing FDM

3d printing Resin

Belt Grinder

Belt Grinder Accessories

Welding

Metal finishing tools

General

Some of my favorite tools of the year

Camera Equipment

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[robinson-foundry]

If you're interested in any of the tools or equipment I use and you want to help support the channel then don't forget to check out some of the affiliate links in the video description. Thank you for the support!

[Brandon-zoly]

Love videos like this that show “failed” attempts and how you were able to overcome them.

[alisontibbens]

No worries. I love watching how ANYTHING is made. The mold making process was just as fascinating as the coin casting. They're absolutely beautiful!

[paulkoether]

I’ve found that casting sterling (.925 silver) is much more forgiving than casting .999 silver, even though you may think .999 is easier.

[____o____]

I love the “imperfections” in the surface of the coins it adds a bit of character to them because they are all different

[siafulinux]

The mold making process is one of the most interesting parts of the process; I'm not sure why anyone wouldn't want to see it but thank you for including it. Very interesting video.

[seenundercygnus]

Very cool! Silver is really soft. I wonder if would have been easier to cast silver coin blanks and then cast your designs into iron to stamp them with?

[f.demascio]

I've only cast silver once, and since it was a jewelery class, we used a sling, which uses centrifugal force to get the metal in completely.
A vacuum casting method might help you improve quality as well.
Great vid.

[grumpygeorge]

These look pretty good considering most coins are come from a mint where they are stamped rather than cast. Stamping allows for a large volume of coins to be made very quickly and with great detail, and each coin comes from the exact same thickness of metal band all stamped from the same die. It’s pretty cool to have made your own coins.

[rachelg]

Silver is so pretty, that’s an awesome finished product. Too bad it was so difficult to work with.

[kursor]

This surface deffects in your coins are caused by direct connection of sprue with Gates. There should be a runner between them and Gate should connect Wit runner at 90 degree angle.
You can connect sprue directly with Gates but in such setup gates should be as slim as possibile and wide- that will filter out all oxidation and provide calm flow.
And some of this deffects can be also due to lose sand in mold.

[jeffrtd]

I'm glad you added the mold making. I really like watching that part :)

[tracybowling]

I always love it when you make a new episode. It's ALWAYS so much fun to watch! I like what we learn. I had no idea that silver would be more tricky than other metals.

[KrakenCasting]

Ah, Seth, you're singing my song! Coin casting is my favorite! These turned out beautifully, warts and all.

[thedorklylionchannel]

Cure them for much longer in direct sunlight. Even in a UV chamber you generally want to cure between 8-20 mins depending on part size.

[tomkzinti]

You ought to do some .950(just to differentiate yours from standard .925 sterling) silver ring blanks(ready for stones), patterned bands or some nice pendants or something...I'd love to be able to cast my own ring and jewelry designs. Think of the different shapes you could do that NOBODY else offers!

[jeffjefferson]

I say vacuum casting is the only way to get great detail when casting silver. I like your wet 3D printing!

The coins you have casted now do have a look of their own though. :)

Greetings,


Jeff

[qhnfevs]

this is amazing!! i can't wrap my head around the fact that humans have been casting coins for over thousands of years ago.

[georgeyoung]

What a crazy yet extremely cool idea. I have been interested in trying this very thing myself. Thank you for posting the things that worked as well as the ones that didn't.

[nicholasdacek]

Im a jewelry caster.
Interesting to see it done in a sand mold

Pure silver is a nightmare to cast, as it cools too fast.

Also, we always keep a separate crucible for every type of alloy to avoid contamination

If you recast it and alloy it with 7.5% copper and add a pinch of borax or boric acid while molten…give it a good stir, it will cast much better. Tho now you’d have sterling silver rather pure

Nice vid. Best of luck!