| |
 |
|
Incomplete
Castings
|
 |
|
| Cause |
Remedy |
| Metal
or flask too cold. |
Increase
casting temperatures. If the metal or
mould are too cold, the metal will
freeze before completely filling the
mould. |
| Improperly
sprued. |
The
sprue system should be designed to allow
the metal to enter easily and without
restriction. |
| Incomplete
burnout. |
Increase
the burn out time at 740ºC. If the
flask is not properly burnt out it will
be impermeable and not allow gases to
escape when the metal enters the mould. |
|
|