Why Sands are used in Moulding?

The principal material used in moulding is the moulding sand’ which is also referred as “Green Sand”. This sand must possess the following qualities. Cohesiveness – The ability to retain its shape when the pattern has been removed during the pouring and solidification, of the metal.  Refractivity – The ability to withstand the heat of the molten, metal without fusing. Porosity – his enables the free escape of gases which form as the hot metal contacts the moisture in the mould. Re-Tempering Qualities – The quality that enables it to be re tempered for…

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What are Various Types of Moulding Furnaces?

A metal must be heated to the correct pouring temperature which is slightly higher than its melting point before it can be cast. There are several ways in which a metal can be reduced to the liquid state. Cupola Furnace – The first and usually the cheapest method of melting iron is in a cupola furnace. The cupola is a melting furnace which is fired with coke to produce the high temperature required for melting iron. In addition to the charge of pig iron, other materials such as lime stone…

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What are the various types of moulding tools?

Moulding work is a basic need to almost every manufacturing process. It is a highly skilled profession. To carry out his craft the moulder has to apply his skill to the vision of the designer and draftsman, the art of the sculptor, the preciseness of the machinist and the exactness of the mathematician. As a result, the moulder has an unchallenged position in the industrial progress in the world. Foundry work deals with the making of moulds, melting the metal and pouring of these metals into moulds to form castings….

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