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Molding and Core Sands topics include: Mold materials, molding sands and its properties, bonding theory, grain size and shape, indian and refactory sands, fire clays, illite and kaolinite, preparation of core mix and molding sand mixtures and binders.
Molding sand and core sands are used in the foundry industry to create molds and cores for metal casting.
Molding sand is a type of sand that is used to prepare mold cavities during the process of sand casting. It is also known as foundry sand. Molding sand is made from natural sand found on river banks and beds, or high-quality silica sand. It is chemically silicon dioxide (Si02) in a granular form.
Molding sand has several properties that affect the quality and success of the casting production: Porosity: Also known as permeability, this property represents the sand's ability to allow gases to pass through. Cohesiveness: This property refers to the sand's ability to hold its particles together, providing strength to the molding sand.
Molding sand can withstand hot molten metal and doesn't chemically react with the metal.
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