Molding Sand Properties
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Strength The ability of the sand mold to hold its geometric shape under the conditions of mechanical stress. Permeability The ability of a sand mold to permit the escape of gases and steam during the casting process. Moisture Content Moisture content affects a mold’s strength and permeability: a mold with too little moisture may break […]
Cold Chamber Die Casting
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With the cold chamber die casting process, the chamber remains at room temperature and does not have a holding pot of molten metal. Metal is melted in a separate furnace and deposited into the shot chamber through a pouring hole by hand with a ladle. In cold chamber die casting, the mold is connected […]
Common Applications of Iron Casting
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Gray Iron Applications One of the key characteristics of gray iron is its ability to resist wear even when lubrication supply is limited (e.g., the upper cylinder walls in engine blocks). Gray iron is used to make engine blocks and cylinder heads, manifolds, gas burners, gear blanks, enclosures, and housings. White Iron Applications The chilling […]
Hot Chamber Die Casting
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Also known as gooseneck casting, the hot chamber die casting process is the most popular die casting process. It is optimal for working with lower melting point alloys such as zinc, magnesium, and lead. A holding pot is filled with metal and heated with hot chamber die casting until molten by an attached or built-in […]
Mechanical Properties of Cast Iron
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The mechanical properties of a material indicate how it responds under specific stresses, which helps to determine its suitability for different applications. Specifications are set by organizations such as the American Society for Testing and Materials (ASTM) so that users can purchase materials with confidence that they meet the requirements for their application. The most commonly used […]
Die Casting Process
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Die casting is the manufacturing process of choice when producing high volumes of relatively complex metal parts and is widely used due to its versatility, reliability, and accuracy. Die casting eliminates all or most secondary operations needed to make a metal part; however, post-machining is common to meet tighter critical-to-function tolerances. Die casting parts can […]
Types of Iron in sand casting
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Wrought Iron The first type of iron produced and worked by blacksmiths was wrought iron. It is virtually pure elemental iron (Fe) that is heated in a furnace before being wrought (worked) with hammers on an anvil. Hammering iron expels most of the slag from the material and bonds the iron particles together. During the […]
Tolerances are Material Dependent
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The difficulty of manufacturing a part to a specific tolerance can be very material dependent. Generally, the softer a material is, the harder it is to hold a specified tolerance due to the material flexing while cutting. Plastics such as Nylon, HDPE, and PEEK may not hold as tight tolerances as steel or aluminum without special tooling […]
What is Molding Sand in Sand Sasting?
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Molding sand has three important advantages over other mold materials: it is inexpensive, it is easily recycled, and it can withstand extremely high temperatures. Sand casting is one of the few available processes for metals with high melting temperatures such as steels, nickel, and titanium. Because of its flexibility, heat resistance, and relatively low cost, […]
Tighter Tolerances Can Change Inspection Requirements
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Keep in mind how features will be inspected when adding tolerances to your parts. If a feature is difficult to machine, it is likely also difficult to measure. Certain features require specialized inspection equipment, and this may increase part costs.