8/28/2011
Compiled by: S K Mondal Made Easy
Compiled by: S K Mondal Made Easy
Casting Terms
y Pattern: Pattern is a replica of the final object to be
y Flask: A moulding flask is one which holds the sand
mould intact. It is made up of wood for temporary applications pp or metal for long‐term g use.
made with some modifications. y Parting line: This is the dividing line between the two
moulding ld fl k that flasks h makes k up the h sand d mould. ld
y Drag: Lower moulding flask.
y Bottom board: This is a board normally made of wood,
y Cope: Upper moulding flask.
which is used at the start of the mould making.
y Cheek: Intermediate moulding flask used in three‐
piece moulding. Compiled by: S K Mondal Made Easy
Contd…
y Moulding sand: The freshly prepared refractory
material used for making the mould cavity. It is a mixture of silica, clay and moisture in appropriate proportions.
Compiled by: S K Mondal Made Easy
Contd…
y Pouring basin: A small funnel‐shaped cavity at the top
of the mould into which the molten metal is poured. y Sprue: The passage through which the molten metal
from the pouring basin reaches the mould cavity. cavity
y Backing sand: This is made up of used and burnt
sand.
y Runner: The passage ways in the parting plane through
which molten metal flow is regulated before they reach
y Core: Used for making hollow cavities in castings.
the mould cavity. y Gate: The actual entry point through which molten
Compiled by: S K Mondal Made Easy
metal enters the mould cavity in a controlled rate. Contd… Compiled by: S K Mondal Made Easy
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