Casting Process - Eastcasting Co., Ltd.

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Casting Process

Casting Process

This method of casting aluminium, brass, iron or other metal pipes will leave uneven surfaces that are somewhat rough to the touch. When aesthetics is not an issue, casting with sand is the best option. Briefly, molten liquid metal is poured into moulds made by forming cavities, which are a replica of the object desired, in a sand mixture. You then cool the metal in the mould. Once the sand becomes compact and the molten metal has hardened, you then remove the cast by breaking away the sand mould. You can smooth the rough texture on the surface of the cast with a grinding machine or by hammer preening and polishing. As the mould is broken to obtain the cast, you have to make a new mould each time you want to cast an object.

Cast Iron Items

The type of sand and the moulding process generally limits the accuracy of the objects cast. Hence you have to improve the finishing by grinding and polishing. You can cast a large iron bell or a small automotive part using the sand casting method. Iron foundries use an abundance of sand to cast table bases, bars and locks. Iron tables are often installed in shooting ranges where the strength, weight and durability of the table are of primary importance.

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