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Manufacturing Process of Sand Casting

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Manufacturing Process of Sand Casting

The process of sand casting can be traced as far back into history as 1000 BC. Obviously, a lot of the process has improved over time, but the crux of the process remains the same. Qualified Sand Casting Company near your house will also use the same metals that were being used for thousands of years. The method of taking a mould of any shape desired by the person and pouring metal into it is the oldest known casting process. These molds made up of sand are relatively cheap, and a very high percentage of metal castings are produced in this manner.

Why the Process is Called Sand Casting?

The process is called sand casting because the metal is poured into a mold that is made up of sand which has been compressed and compacted to give it the desired shape. The sand contains some other bonding agent like clay to hold the structure together so that when the metal is poured into the cavity, it does not collapse.

Steps of the Manufacturing Process of Sand Casting

  • Make the desired pattern which you want to use as a mold. The mold should have the ability to facilitate thermal contraction and expansion. You need to place the pattern in the sand to be able to create the mold.
  • After the mold has been created, the manufacturers will incorporate it into a gating system which will allow the metal to be poured into the mold. This is also required so that the gases that are produced by the heating metals can have an escape route and the contracting or expanding nature of the metal can be handled.
  • The pattern started being created which includes the pathway for the metal to be poured is made up of materials like wood, synthetics, expandable polystyrene (EPS) and also other metals; the material that is being used depends upon the volume and the tolerance.
  • When the manufacturer is creating the mold, they will keep in mind that the sand, including the binding material, will be strong enough to hold the shape of the metal with the pattern that is being created. It must also be brittle and have so that it can be broken down when the metal solidifies to get the final product. To achieve this perfect state, the manufacturer takes great care because this is the crux of the process.
  • The manufacturer will select the binding agents that must be mixed with sand to get the perfect mold. To make the process more functional generally, the mold is created in two pieces. The top part is called the cops while the bottom is referred to as the drag. A refractory coating is also added to increase the durability of the mold.
  • The metal is tilted and poured into the mold, and there are many variations to this process. Special care is taken by the manufacturer to pour the metals that heavily react with oxygen.

Sand Casting is a process that has been going around for centuries whose operation can be trusted as it has been perfected over time.

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