GATES/ IN-GATES:-
These are the opening through which molten metal enters into the mould cavity. Depending on the application, the various types of gates are
Top gate:- The molten metal enters into the mould cavity from the top. These are only used for ferrous alloys. Suitable for simple casting shape. There may be chance of mould erosion. Bottom gate:- This type of gating system is used for very deep moulds. It takes higher time for filling of the mould cavity. Parting gate:- This is most widely used gate in sand casting. The metal enters into the mould at the parting plane. This is easiest and most economical. Step gate:- These types of gates are used for heavy and large casting. The molten metal enters into the mould cavity through a number of ingates arranged in vertical steps. The size of ingates are increased from top to bottom ensuring a gradual filling of mould cavity.
These are the opening through which molten metal enters into the mould cavity. Depending on the application, the various types of gates are
Top gate:- The molten metal enters into the mould cavity from the top. These are only used for ferrous alloys. Suitable for simple casting shape. There may be chance of mould erosion. Bottom gate:- This type of gating system is used for very deep moulds. It takes higher time for filling of the mould cavity. Parting gate:- This is most widely used gate in sand casting. The metal enters into the mould at the parting plane. This is easiest and most economical. Step gate:- These types of gates are used for heavy and large casting. The molten metal enters into the mould cavity through a number of ingates arranged in vertical steps. The size of ingates are increased from top to bottom ensuring a gradual filling of mould cavity.
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