The Backyard Foundry (Workshop Practice Series, No. 25)

A foundry is used to produce castings of metal. You can melt, pour or cast metals both ferrous and non-ferrous. The most common material used is iron, but other metals can include aluminum, copper, tin and zinc. The main part of a foundry is the furnace. The metal is melted so that it can be poured into molds. The molds are usually made of sand, metal, ceramic or refractory metals. When the metal becomes solid it is then cast into shape. That is why it is called metal casting. Metal castings are produced in a foundry where metals are cast into shapes by melting them in a furnace. The furnace has to be

specialized to handle the hot metals. A refractory metal that can handle the extreme heat usually lines the furnace.

When using an aluminum alloy a degassing procedure is needed to reduce the hydrogen in the metal. Without this degassing the cast will deteriorate from the hydrogen gas.

The mold is usually made of a material that can withstand the metal to be poured. In sand casting a green or resin sand mold is used. A mixture of ceramic and sand is used for the mold for Lost foam casting. While Investment casting uses a mixture of ceramic and sand for a mold. Plaster molds are used for Plaster casting and metal molds for Die-casting. In V process casting a vacuum is used with plastic to form sand molds.

Dear Metal Casting Fans,

I am writing to you in behalf of your Heavenly Father. He is seeking you like a lost sheep. You remember the Bible story? It is about a shepherd who has 100 sheep. But when he brings the sheep home one night, one is missing. He then leaves the 99 sheep and goes out into the wilderness until he finds that lost sheep.

In this parable the shepherd goes out to search for the one lost sheep-the very least that can be numbered. So if there had been but one lost soul, Christ would have died for that one. To read more click Lost Sheep

Susan Dietel
Web Programmer
Email: susansdesign@yahoo.com
Web Site

Hobby Metal Casting for the small Foundry. Information, Books and Supplies for the Backyard Metal Casting Foundry. English gold casting metals and more.
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