1. Pattern Design:
- The pattern must account for shrinkage as the metal cools.
- It’s crucial to include features like draft angles to facilitate easy removal from the mold.
2. Cooling Channels:
- Incorporating cooling channels within the mold can enhance heat transfer and improve cooling rates.
- This helps reduce the risk of defects caused by uneven cooling.
3. Ventilation:
- Proper ventilation must be designed into the mold to allow gases to escape during the pouring process.
- This minimizes the chances of gas entrapment, which can lead to flaws in the casting.
4. Material Selection:
- The choice of mold material affects the thermal conductivity, durability, and overall performance of the mold.
- Consideration of the operating temperature and the type of metal being cast is essential.