Fluidity Of Liquid Metals In Terms Of Casting
Sand casting is one of the most used production type of heavy metal parts. These heavy metal parts can be very complex in shape, and other production types may not be suitable for commercial production of them. To produce these complex geometries in sand casting from metals, a proper mold cavity must be opened inside cast sand. These cavities are obtained with patterns.
In here, we explain the patterns that are used in casting operations and types of these patterns.
To obtain an internal void inside sand to fill it with cast metal, pattern of a produced part must be designed and produced. These patterns must have same shapes with original part. But some parameters must be considered in the phase of pattern design;
In general, three types of materials are used in the design of patterns; Wood, metal and plastics. Metals are very costly to produce. Various machining operations must be applied. But for high quantity of productions, metal are better.
Wood patterns are also used, and they are very cheap and shepable. But, during the packing of sand upon wood patterns, they can abrade and deform. So, they are suitable for low-quantity of productions.
In terms of both cost and production quantity, plastics take place between woods and metals. They can preferred for middle-quantity production of cast parts.
For san casting operations, casting patterns are produced according to complexity of produced part and the quantity.
These are the general expressions of patterns that are used in general sand casting operations. Do not forget to leave your comments and questions about patterns that are used in sand casting operations below. Your precious feedbacks are very important for us.