Atlas of Wax Pattern Defects
Negative
Mottled, rough appearance at the surface, sometimes in patches.
Varies
Large flat featureless surfaces
Orange peel, flow lines
Visual inspection with tangential lighting (at a low angle to the surface to create shadows of small protrusions)
Non-uniform distribution of filler in wax
| Area | Possible Cause | Potential Correction |
|---|---|---|
| Equipment | Out of calibration |
See Best Practices Section |
| Equipment | Low wax temperature |
Increase wax temperature, but be aware this may cause solids to drop out more readily if improper mixing is the cause. |
| Equipment | Low injection pressure |
Increase injection pressure in reasonable increments |
| Equipment | Wax flow insufficient |
Increase flow rate. |
| Equipment | Filler separation |
Use proper conditioning parameters including appropriate agitation in melting tank and in tank. Ensure wax has not separated in injection hose/nozzle by purging. Consult wax supplier for conditioning and melting procedure |
| Pattern Die | Cold die |
Reduce cooling water. Preheat die before injection. |
| Pattern Die | Poor surface finish in die |
Polish die cavity. |
| Other | Excess or improper type mold release |
Reduce amount of mold release and use the correct type for soluble wax. |