What is the name given to an exporting-only economy? In international trading there can be an economy that only exports, but restrict the import to minimum or at all. I cannot recall what the name given to this type of economy.
Is "autarky" the word you're looking for? That's been used to refer to a self-sufficient economy that does not need imports. As others have written, it's an ideological position that chooses to make a country worse off, and doesn't happen in reality, except for short periods in exceptional circumstances.