Atlas of Casting Defects
Negative and positive
Dinged surface. Smooth negative with accompanying positive burr, dented edge, rolled corner, bent or distorted metal
Various
Protruding features, corners, thin areas
N/A
Knockout Damage
Visual or dimensional gauging
Castings are damaged at some point after solidification
| Area | Possible Cause | Potential Correction |
|---|---|---|
| Foundry | Damage occurring during handling | |
| Other (Knockout/ cutoff/blasting) | Damage occurring during mechanical cleaning |
Reduce tumbling speed or add cushioning material with castings (addition of rubber blocks during tumble blast) |
| Other (Transporting) | Damage occurring during transportation |
Ensure floors are level, wheels on carts are adequate |