| Problem |
Cause |
Remedy |
| Mould over fills |
Air pressure too high. |
Reduce air pressure |
 |
| Wax too hot. |
Adjust temperature |
|
| Plates heldwith uneven |
Held plates firmly,distributing pressure
evenly over |
|
| Pressure/not covering mould. |
Entire mould surface. |
|
| Mould held too long at nozzle. |
Hold for less time. |
 |
| Mould not filling |
Air pressure toolow. |
Adjust air pressure. |
|
| Wax not hot enough. |
Adjust temperature. |
|
| Nozzle plugged. |
Remove and clean. |
|
| Mould held too tightly. |
Hold without squeezing. |
|
| Uneven pressure caused by dirty plates. |
Clean plates so surfaces are flat. |
|
| Air trapped in mould. |
Make air release cuts(vents) in mould.
Be sure wax pot is more than ½ full. |
|
| Mould too cold. |
Warm mould |
|
| Air bubbles in pattern |
Air pressure too high. |
Adjust air pressure |
|
| Wax pot low on wax.. |
Add wax. Be sure that wax pot is more
Than ½ full. |
|
| Wax too hot or cold. |
Adjust temperature and stir wax to
release trapped air. |
|
| Mould held at wrong angle to nozzle. |
Held muold on same plane as nozzle. |
|
| Wax brittle |
Wax too hot. |
Check temperature of platens. |
|
| Wax has been reused. |
Use new wax. Use no less than 90% new
wax with reused. Try avoiding using old wax. |
|
| Moulds cooling too long before opening. |
inject fewer moulds during production cycle. |
|
| Using unsuitable wax. |
Use wax that is suitable to type of
pattern beingproduced. |
|
| Wax discoloured (brownish) |
Wax too hot. |
Clean wax pot (steam or soak in Percloroethylene);add new wax. |
|
Pattern bend easily,
wax sticks to mould |
Wax too hot. |
Adjust temperature. |
|
| opening mould too soon or mould too hot. |
Prolong cooling period by working more moulds. |
|
Wax keeps flowing
after mould is filled |
Dirt inside the nozzle. |
Remove and clean nozzle. |
|
| |
