Selecting The Proper Crucible; Alloy Melting And Injection - Polaris Easy Cast Instruction Manual

In general, the EasyCast Machine is used in three stages, namely, selecting the
proper crucible, melting the alloy, and injection.

Selecting the Proper Crucible

EasyCast is presented with one crucible and one glass carbon protector:
1.Ceramic Alloy Melting Crucible
The Ceramic alloy melting crucible is used for casting non-precious alloys.
Precious metals are cast by using this crucible along with a crystal-carbon
crucible. These crucibles can tolerate temperatures between 1500 and 1600
degrees Centigrade. The crucible prevents sticking between the exiting melt
and the crucible bottom.
2.Crystal-Carbon Crucible
This crucible is used for melting precious metals including gold. First, the
precious alloy is placed inside a crystal-carbon crucible and then inside a china
crucible. If the precious alloy comes in direct contact with the china crucible, it
sticks to the china and causes considerable loss of the alloy. This would also
increase the temperature inside the crucible (which must remain constant).
Never use the silica-carbon-graphite crucible for non-precious
alloys.
Melting and Injection of Alloys
- Switch on the machine.
- Set the rotational speed of the arm: Select "Slow" for precious alloys, and
"Fast" for non-precious alloys (like Cobalt),
- Calculate the required amount of ingot and place it inside the crucible. Avoid
dropping them or hitting them against the crucible since shock loads lead to
cracking of the crucible.
- Place the crucible in the respective position inside the machine.
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