Casting terms:-
Flask- It holds the sand mould intact. It is made up of wood for temporary application and metal for long term use.
Drag- Lower moulding flask
Cope – Upper moulding flask
Cheek – Intermediate moulding flask used in three piece moulding.
Pattern - Replica of final object to be made with some modifications. Mould cavity is made with the help of pattern.
Parting line – Dividing line between two moulding flasks.
Bottom board – Board used to start mould making (wood)
Facing sand - Small amount of carboneous material sprinkled on the inner surface of the mould cavity to give better surface finish to casting.
Moulding sand – Freshly prepared refractory material used for making the mould cavity. (Mixture of silica, clay & moisture)
Backing sand – used and burnt sand
Core – Used for making hollow cavities in the casting
Pouring basin – Funnel shaped cavity on the top of the mould into which molten metal is poured
Sprue – Passage from pouring basin to the mould cavity. It controls the flow of molten metal into the mould.
Figure 1 Cross-section of a sand mould ready for pouring
Runner – Passage ways in the parting plane through which molten metal flow is regulated before they reach the mould cavity
Gate – Actual entry point through which molten metal enters the mould cavity
Chaplet – Used to support the core to take of its own weight to overcome the metallostatic force.
Chill – Metallic objects to increase cooling rate of casting
Riser – Reservoir of molten metal in the casting so that hot metal can flow back into the mould cavity when there is a reduction in volume of metal due to solidification.
Flask- It holds the sand mould intact. It is made up of wood for temporary application and metal for long term use.
Drag- Lower moulding flask
Cope – Upper moulding flask
Cheek – Intermediate moulding flask used in three piece moulding.
Pattern - Replica of final object to be made with some modifications. Mould cavity is made with the help of pattern.
Parting line – Dividing line between two moulding flasks.
Bottom board – Board used to start mould making (wood)
Facing sand - Small amount of carboneous material sprinkled on the inner surface of the mould cavity to give better surface finish to casting.
Moulding sand – Freshly prepared refractory material used for making the mould cavity. (Mixture of silica, clay & moisture)
Backing sand – used and burnt sand
Core – Used for making hollow cavities in the casting
Pouring basin – Funnel shaped cavity on the top of the mould into which molten metal is poured
Sprue – Passage from pouring basin to the mould cavity. It controls the flow of molten metal into the mould.
Figure 1 Cross-section of a sand mould ready for pouring
Runner – Passage ways in the parting plane through which molten metal flow is regulated before they reach the mould cavity
Gate – Actual entry point through which molten metal enters the mould cavity
Chaplet – Used to support the core to take of its own weight to overcome the metallostatic force.
Chill – Metallic objects to increase cooling rate of casting
Riser – Reservoir of molten metal in the casting so that hot metal can flow back into the mould cavity when there is a reduction in volume of metal due to solidification.
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