Draw a neat sketch of Gating system. State the functions of any four elements.

Draw a neat sketch of Gating system. State the functions of any four elements.  
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Answer :

Gating system: 

1. Sprue: The circular cross section that minimizes heat loss and turbulence is sprue, and the area of it is quantified from the choke area as well as the gating ratio. 

2. Sprue Well: It is also designed to limit the free molten metal fall, by directing the metal in a correct angle to the runner. The sprue well aids in minimizing the turbulence and aspiration. 

3. Runner: It primarily slows down the flow speed of the molten metal, during its free fall from the above-mentioned channel to the ingate. The runner cross section has to be not just bigger than the sprue exit but also allow filling the molten metal, before letting it enter the ingates. 

4. Ingate: This is the component, which directs the liquid to the die cavity. Die casters recommend ingate be designed to minimize the metal velocity; the design has to facilitate easy fettling, should not lead to hot spot, and the molten metal flow from the ingate has to be proportional to the casting area’s volume. 

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