Atlas of Casting Defects
Negative
Metal fin across an area that is formed by a ceramic core. In the case of core break and shift, missing metal where a wall should be.
varies
Can only occur on casting made with ceramic core
N/A
N/A
Visual, X-ray in case of hidden from view
Core breaks either during wax injection, during mold heating, or metal pouring
| Area | Possible Cause | Potential Correction |
|---|---|---|
| Wax | Mold design creates stress on core upon clamping or wax injection |
Examine need for core print relief or core supports to reduce stress |
| Shell | Poor core slipping method |
Examine for too many core locks |
| Other (Mold design) | Too high of wax injection pressure |
Reduce injection pressure |