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The World of Expendable and Permanent Moulds in Iron Casting

The true pioneers of Industrial Development and the improving standard of living are the foundries – Metal, Iron or Ductile Iron Foundries across the nation. But do we really understand the actual functioning of the same?
Let us debunk this alien concept by understanding the basics of metal castings and different moulds used.

The process where the molten metal is poured into the mould containing a hollow cavity to get any geometrical shape one wants is casting. This process can be further can be divided into two types – Expendable or Semi-permanent Mould and Permanent Mould. Let us find out what are their functions:

Permanent moulds are made of metal with a high melting point over the metal that needs to be cast. The main purpose of using these permanent cores is because they are simple to use and can be reused. Such moulds are generally used for both low-temperature alloys and iron. The castings from this method have thin walls as they are produced with “close tolerance”. Castings made this way are fine-grained and dense with a smoother surface finish. A few common types of permanent castings are:

  • Low-pressure Casting
  • Gravity Casting
  • Die Casting

Semi-permanent moulds are the ones where the cores are expendable and can result in more complex shapes. Usually, sand, plaster and ceramic is used as the core as it allows the possibility of being taken out or broken down to get the casting out. Such moulds are generally bound with a bonding agent that improves its properties and creates complex, intricate castings. A few of the examples are:

  • Sand Casting
  • Plaster Moulding
  • Shell Moulding
  • Ceramic Moulding
  • Investment Casting

Among the foundries in Kolkata famous as industrial casting manufacturers, Govind Steel is one of them. Govind Steel is one of the largest and leading foundries for Grey Iron Castings and Ductile Iron Castings in India. To know more about the same, kindly visit – www.govindsteel.com

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All About Metal Castings – The process, different types and more

In the history of industrial manufacturing techniques, casting is the oldest one. However, modern advancements in technology have led to a host of casting methods and techniques. But before we get into that, here is what casting actually is. It is a process that allows molten metal to be poured in a specially designed mold to take various shapes Read more

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Choosing Between Ductile Iron And Traditional Cast Iron

Each casting foundry of India is known either for their Ductile Iron or the Traditional Cast Iron or both. While both the types are cast in the same foundry, their properties and varied and how. From applications to different resistance-levels, both the iron types play a pivotal role in the construction industry.Choosing a suitable kind for a particular job is extremely important and knowing the basics, tend to help. Below is a list of few basic differences between Ductile Iron and Traditional Cast Iron.

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The Types of Iron Cast in a Foundry

While we are well-versed with the role of iron in the industrial sector, what’s often confusing is the different types of iron and iron alloys – cast iron, ductile iron, and wrought iron to begin with. It all begins with a metallurgist listing down his requirements – mostly mechanical and then an alloy is suggested. Followed by the above, Read more

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Everything You Should Know about Ductile Iron

If you’ve ever wondered what goes into building everything around you, you’ll know that metal is the answer. You might even be able to guess which metal but what about the details of each of these metals? When it comes to the nitty-gritty of these metals and which kind of iron, steel or alloy goes into which product, most of the people are clueless.

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