| Condition |
Cause |
Correction |
| Mold Overfills |
- Air pressure too high
-
Wax too hot
-
Mold Plates held with uneven
-
pressure / not covering mold
-
Mold held too long at nozzle
|
- Reduce air pressure
-
Adjust temperature
-
Hold plates firmly, distributing pressure evenly over entire
mold surface
-
Hold for less time
|
| Mold Not Filling
|
- Air pressure too low
-
Wax not hot enough
-
Nozzle plugged
-
Mold held too tightly
-
Uneven pressure caused by dirty Mold Plates
-
Mold too cold
|
- Adjust air pressure
-
Adjust temperature
-
Remove and clean
-
Hold without squeezing
-
Clean Mold Plates so surfaces are flat
-
Make air release cuts (vents) in mold
-
Be sure wax pot is more than 1/2 full
-
Warm mold
|
| Air Bubbles In Pattern
|
- Air pressure too high
-
Wax pot low on wax
-
Wax too hot or too cold
-
Mold held at wrong angle to nozzle
|
- Adjust air pressure
-
Add wax. Be sure wax pot is more than 1/2 full
-
Adjust temperature and stir wax to
-
release trapped air
-
Hold mold on same plane as nozzle
|
| Wax Brittle
|
- Adjust air pressure
-
Add wax. Be sure wax pot is more than 1/2 full
-
Adjust temperature and stir wax to
-
release trapped air
-
Hold mold on same plane as nozzle
|
- Adjust temperature
-
Use new wax
-
Inject fewer molds during cycle production
-
Use a Kerr Injection Wax
|
| Wax Discolored
|
|
- Clean wax pot, add new wax
|
| Patterns bend easily, wax sticks
to mold |
- Wax too hot Opening mold too soon or
mold too hot
|
- Adjust temperature Prolong cooling period
by working more molds
|
| Wax keeps flowing after mold is removed |
|
|
