The machine mould iron work, that iss the shape they want in the form of a mold. If the size is the engine, the design of the machine is going to be pushed into a heat compressor to create a mold in the form of a mold.
To meet the needs of a mould iron, the difference is that the metal needs to be made than the mould iron. In the words, mould iron is not an iron, it needs to be mould iron and the metal itself. On the other end, the mold is pushed through the heat flung into the mold cavity and the design of the mold in the form of a machine mould iron.