Pattern Materials
The requirements of pattern are:
- Secure the desired shape and size of the casting.
- Cheap and readily available.
- Light in mass and convenient to handle.
- Have high strength.
- Retains its dimensions and rigidity during the entire service of its life.
Based on the above factors, we can choose pattern material as follows:
- Piece and short run production: Plastic
- Large scale and mass production: Metal
- Batch production: Plastics