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Trouble Shooting
Wax
Mould overfills
Air pressure too high (depend on master piece)
Reduce air pressure
Wax too hot
72-75°C is recommend temperature
Plates held with uneven pressure/not covering mould
Heil plates firmly, distributing pressure evenly over entire mould surface
Mould held too long at nozzel
Hold for less time
Mould not filling
Air pressure too low
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 releases cuts(vents) in mould
Be sure wax pot is more than ½ full
Air bubble in pattern
Air pressure too high
Adjust air pressure
Wax pot low on hot
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 mould on the same plane to nozzle
Wax brittle
Wax too hot
Check temperature of wax pot
Wax has been reused
Use new wax. Use no less than 90% new wax with reused. Try avoiding using old wax
Mould cooling too long before opening
Inject fewer mould during production cycle
Using unsuitable wax
Use wax that is suitable to type of pattern being produced
Wax discoloured(brownish)
Wax too hot
Clean wax pot (stream or soak in percloethylene) : add new wax
Patterns bend easily, wax stick to mould
Wax too hot
Adjust temperature
Opening mould too soon or mould too hot
Prolong cooling period by working more mould
Wax keeps flowing after mould is filled
Dirt inside the nozzle
Remove and clean nozzle
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