The mold cools and the metal solidifies, then the casting is ejected from the mold and cleaned. The ladle is then tipped to pour molten metal into a mold cavity. Any slag or impurities are skimmed from the top of the molten metal surface. Once the molten metal has reached a specific pouring temperature it is tapped from the furnace through a spout into a refractory lined steel pouring ladle. Mistakes can be lethal.Ī melting furnace is “charged” with metal and heated above the metal’s melting point. The most common mold material is silica sand, but they can be produced from a number of different materials depending on the casting metal and method being used.Ĭharging is one of the most dangerous operations in the foundry. The final casting shape corresponds with the mold it is poured into, so molds are carefully shaped with a pattern – a wood or metal replica of the object to be cast. The general steps involved in casting are patternmaking, molding, melting, pouring, ejection, cleaning, fettling, and inspection. In order to understand a foundry, you need to understand the casting process.
90 percent of all manufactured goods rely on metal castings. They also form components for machines that are required to make many of the essential consumer products we depend on. There is a good chance that you are reading this less than 10 feet away from one.įoundries don’t just produce metal products for engine, railroad, or pipe components. Even if you have never been to a foundry, or even know what one looks like, you are surrounded by the metal castings they produce. In simplified terms, a foundry is a factory where castings are produced by melting metal, pouring liquid metal into a mold, then allowing it to solidify. En español Foundries are facilities that produce metal castings and offer casting-related services A foundry is a factory where metal is melted and cast into new shapesįoundries are responsible for our current standard of living and industrial development, but most of us know next to nothing about them.
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