Casting
The flask
         cope
                          The flask is when
                          the cope and the
           ...
Pattern           Tapered sides




  Rounded edges
                         S.Watson
Runner and Riser
runner             riser




                           S.Watson
Equipment




            S.Watson
Safety

            Aluminium is
            melted to very high
            temperatures so
            safety is extreme...
Crucible

           The crucible is
           preheated. This
           removes any moisture
           from the furnac...
Charging with Aluminium

                Aluminium ingots
                are added.




                           S.Wats...
Adding Flux

              Flux prevents
              oxygen entering the
              molten aluminium.
              I...
Degassing tablet

                   This removes any
                   impurities, in the
                   form of gas...
Pyrometer

            When the
            temperature
                        0

            reaches 650 c it’s
        ...
Pyrometer




            S.Watson
‘Dross’

          Before pouring the
          ‘dross’ is removed.
          This is all the
          impurities which
 ...
Lifting tongs




                S.Watson
Pouring

          Great care is
          needed as the
          molten aluminium is
          extremely hot.




      ...
Pouring

          The molten
          aluminium is
          poured in the
          runner.
          When the empty
  ...
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Casting

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Casting

  1. 1. Casting
  2. 2. The flask cope The flask is when the cope and the drag are in place together. Parting powder can be pattern used to help separate the pattern from the sand. green drag sand S.Watson
  3. 3. Pattern Tapered sides Rounded edges S.Watson
  4. 4. Runner and Riser runner riser S.Watson
  5. 5. Equipment S.Watson
  6. 6. Safety Aluminium is melted to very high temperatures so safety is extremely important. Melting points:- Aluminium approx:- 660 c 0 Steel approx:- 1330 c 0 S.Watson
  7. 7. Crucible The crucible is preheated. This removes any moisture from the furnace and crucible. S.Watson
  8. 8. Charging with Aluminium Aluminium ingots are added. S.Watson
  9. 9. Adding Flux Flux prevents oxygen entering the molten aluminium. If oxygen does enter the aluminium the final mould can contain bubbles which ruin the finish. S.Watson
  10. 10. Degassing tablet This removes any impurities, in the form of gas. The gas fumes can be very dangerous. S.Watson
  11. 11. Pyrometer When the temperature 0 reaches 650 c it’s ready for pouring S.Watson
  12. 12. Pyrometer S.Watson
  13. 13. ‘Dross’ Before pouring the ‘dross’ is removed. This is all the impurities which have risen to the top. S.Watson
  14. 14. Lifting tongs S.Watson
  15. 15. Pouring Great care is needed as the molten aluminium is extremely hot. S.Watson
  16. 16. Pouring The molten aluminium is poured in the runner. When the empty cavity is full the aluminium rises up the riser. S.Watson

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