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SAND CASTING


Sand casting is one of the most popular and simplest types of casting that has been used for centuries. Sand casting allows for smaller batches to be made compared to permanent mould casting and at a very reasonable cost. Not only does this method allow manufacturers to create products at a low cost, but there are other benefits to sand casting, such as very small size operations.

From castings that fit in the palm of your hand to train beds (one casting can create the entire bed for one rail car), it can all be done with sand casting. Sand casting also allows most metals to be cast depending on the type of sand used for the moulds.

Sand casting requires a lead time of days for production at high output rates (1-20 pieces/hr-mould) and is unsurpassed for large-part production. Green (moist) sand has almost no part weight limit, whereas dry sand has a practical part mass limit of 2300-2700 kg. Minimum part weight ranges from 0.075-0.1 kg. The sand is bonded together using clays (as in green sand) or chemical binders, or polymerized oils (such as motor oil). Sand can be recycled many times in most operations and requires little additional input.



Sand Casting - Hand Mould

Advantages

Least Expensive in small quantities (less than 100)
Ferrous and non - ferrous metals may be cast
Possible to cast very large parts  
Least expensive tooling



  Recommended Application

 
Use when strength/weight ratio permits
Tolerances, surface finish and low machining cost does not warrant a more
  expensive process


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