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Making a bolt with ZIGZAG threads - SO STRANGE! - Lost PLA metal casting

Robinson Foundry

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Published on Nov 12, 2021
In this video I will be making a bolt with unique zigzag threads. I started this project by 3d printing models in a plastic called PLA. Then I coated the models 10 times with a ceramic material called Suspendaslurry. After the ceramic shells were completely dry I placed them in my kiln and melted out the PLA plastic. At 1500 degrees Fahrenheit the ceramic shells became vitrified, turning into a ceramic that can withstand the heat of molten bronze. I melted the bronze in my homemade keg foundry furnace and then poured the liquid metal into the ceramic shell molds. This is similar to the lost wax casting process.

-------- Affiliate links to items used in this video -------

Polishing Compound
The best polishing wheels ever
Overture 3d printer filament
Some of my favorite hand files
The die grinder I use
Clear Coat - I love this stuff!
NeverDull metal polish
Liver of Sulfur

Thinking about getting into 3d printing and/or metal casting? Do yourself a favor and and buy yourself a 3d printer! Here are some I recommend:

Elegoo Saturn 3d Printer
Creality Ender 3 Pro V2

All of the links above are affiliate links. This means that, at zero cost to you, I will earn an affiliate commission if you click through the link and finalize a purchase.

------- 3d printed versions -------

I plan on selling 3d printed versions of the bolts shown in this video. I'm am working to set up a website and sell them as soon as possible. Please check here soon.
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