Design Criteria -- The pattern has to be planned and designed so that –
- The parting line is straight and in the largest cross-sectional plane of the casting.
- The component face with the greatest surface detail is in the drag, because fluid fill is better in the drag and non-metallic inclusions tend to segregate at the top of the casting .
- The pattern is oriented for smooth, non-turbulent fluid flow.
- The need for cores is minimized/eliminated.
