Identify the feature ‘A’ in the casting figure given.

Explanation:

Pattern:

• It is the first step to prepare a model pattern
• The pattern is the replica of the feminine model of final casting to be produced with some allowances.
• Mostly pattern is made of wood, it is very cheap and workability
• For higher durability and strength pattern are made from brass, aluminium alloys.

Flask: 

• The flask is the container box that holds the molding sand. Consisting of two parts, cope (the top half of a flask) and drag (the bottom half of a flask).
• A flask is typically made of aluminum, steel, or wood and can be made in any shape and size.
• To align the cope and drag, an alignment feature is used ensuring a more dimensionally accurate casting.
• Flasks are reusable, some may be used to form a mold and then removed prior to pouring a casting, others contain the mold throughout pouring and are then shaken out.

Cope:

• The top half of a two-part casting flask used in sand casting.

Drag:

• The bottom half of a two-part casting flask used in sand casting.

Parting line:

• The line that divides the cope and drag box is called the parting line.

Mould:

• It is used to create the cavity through which molten metal flows to obtain the product.