Gated Pattern
Many times it is desired to produce the multiple small parts in one go. In such case, small part cavities are created in one mould and these cavities are joined by the system of runners and gates. This arrange helps to achieve higher productivity. Such type of pattern system is known as gated pattern. A typical gated pattern is shown in Fig.6.2.1.
Sweep Pattern
For axi-symmetrical castings such as bells, the full cavity of the casting can be created by sweep in the pattern around the spindle. The pattern is a part of the full shape of the end product. Such patterns are known as sweep pattern and are preferred for shaped castings. A typical sweep pattern is shown in Fig.6.2.2. producing large symmetrical.
Skeleton Pattern
As the name of the pattern suggest, this type of pattern are made of strips of wood or plastic. These strips are used for building the Skeleton of the pattern giving the correct shape and size of the pattern. Around and inside Skeleton of pattern molding sand is packed. This type of pattern is used for very large casting. A typical Skeleton pattern is shown in Fig.6.2.3
