Manchester Metals, Inc. pours prototype sand castings in gray and ductile iron for select projects.
Prototype castings can be used to evaluate a design or put very small quantities of castings into production. In many cases the foundry processes used to make prototype castings are the same as those used for any small to medium volume casting.
In some cases a traditional wood pattern made by referencing 2D drawings, physical models, or existing parts is the quickest and most economical method for making prototype castings. For castings with relatively simple geometry the traditional pattern maker is able to render a production foundry pattern in wood, aluminum, or castable urethane concurrent to adapting a design for sand casting by adding draft, fillets, rounds, and machining pad.
Links to this information can be found at Peridot, Inc.