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THE CASTING PROCEDURE (3)
V. Ryan 2003 - 2022
 

POURING THE ALUMINIUM - The two man ladle is then lifted which raises the crucible from the floor. The teacher must always control the pouring of the molten metal and so holds the two handles. The second person (possibly a pupil) holds the single handle allowing it to revolve when the ladle is turned for pouring by the teacher. A third person stands behind the crucible and uses a steel steady to prevent the crucible from falling out of the ladle.
The aluminium is poured into the runner and when the cavity is full is rises up the riser. The flow of aluminium should be constant, if there is even a short break in pouring the cast aluminium it may cool and the cast may be imperfect.

SAFETY CLOTHING MUST BE WORN !!

   

   
 

SAFETY MUST BE A PRIORITY WHEN CASTING.

IN TOTAL, THREE PEOPLE ARE REQUIRED.

ONE PERSON REMOVES THE CHARGED CRUCIBLE FROM THE FURNACE, PLACING IT IN THE LADLE’S RING AND ‘BEDDING’ IT IN THE SAND.

TWO PEOPLE CONTROL THE LADLE WHEN POURING THE ALUMINIUM. A THIRD PERSON STANDS AT THE BACK, USING A STEEL STEADY HOOK, ENSURING THE CRUCIBLE CANNOT SLIDE OUT OF THE LADLE.

 
 
 
 
The third person stands behind the crucible and uses a steel steady to prevent the crucible falling forward and out of the ladle.
 
 
   
 
   

QUESTIONS:
1. Sketch the stages involved in the use of a furnace to prepare aluminium ingots for casting.
2. Explain the need for safety clothing / equipment when casting.

   

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