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Fabrication of Metals: Casting Metals are created by different methodology to make them at their desired characteristics. There are many kinds of fabrication techniques and methods, and there are different usage for particular metal use of these depending on its properties, shape and the SSP properties. SSP means shape-size properties, this are the three factors that makes metal Valparaiso, IN unique. Metal fabrication techniques are mainly made out of four kinds: • Casting – giving shape by pouring in liquid metal into a mold that holds the required shape and letting it harden without using external pressure or any machinery to shape it. • Forming – this gives the metal its shape when it is in solid state, by applying pressure using machinery. • Machining – the material is removed within the equipment in order to provide its required shape and size. • Joining – it is where the different parts are joined by various means. One of the most important techniques would be the “powder metallurgy”. Metal Casting The technique is used when a produce is on its large or complicated shape. The particular material is currently is in its low ductility. Where it is economical compared with other techniques. There are different techniques used in casting such as: sanding, die, investment and continuous castings. Sand Casting This is common casting method where the sand is used as the casting material. A Two-piece mold is formed by compacting of sand around a pattern of a required shape. Additional gating is used for properly distribution of liquid. Die Casting The metal is forced into mold by using external pressure at high velocities. The permanent two-piece mold is also made of steel. This technique is effective for having rapid cooling rate, thus it is inexpensive compared with other casting method. Investment casting In this pattern is made out of wax. The metal fluid slurry of casting material is poured over the cast that eventually hardens and hold the required shape. The patter material is heated to leave behind the cavity. In this technique, high dimensional accuracy, reproduction of fine details and an excellent finish are required. Examples of metals that are formed by this technique are: jewelry, dental crowns, and gas turbine blades jet engine impellers. Continuous casting After the refinery of metals, they are usually in molten state, where are later harden into ingots for further processing like forming. The continuous castings, the hardening and primary forming process are combined. The refined metal is directly cast into strand of continuous which is cooled by water jets. The technique is highly automated while providing greater efficiency. The technique is completely easy where uniform composition through-out the casting is achievable when compared with ingot cast products. These are the ways in casting metals. These process have different methods of doing it, but they have the same purpose of casting the liquid form of metal into a solid form that would be passed to the metal forming stage where shaping takes place. If you wanted to know more about metals, you may read our article and learn more about metals and its processing.
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