Lost Foam Casting
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- Wikipedia more general case of Investment Casting - [1]
- Wikipedia Lost Foam Casting - [2]
- Lost Foam Casting - form is burned out as metal pours, not requiring a separate step. Form is Milled for EPS or pink foam, put in mold, and cast with gas furnace using aluminum. https://www.youtube.com/watch?v=9bYVQ8ypHss
- Commercial version - printing in wax, milling smooth, then apparently melting out the form, then pouring. Very precise objects can be made. https://www.solidscape.com/high-precision-investment-casting-wax-3d-printer/
- Otherwise, you can do cotinuous cast of billet.