what are the casting parameter that influence the fluidity of molten metal? give the reason for the following 1-fluid flow is important in casting what is the purpose of tapering of sprue in casting give reason to your answer

A. what are the casting parameter that influence the fluidity of molten metal?  

B. give the reason for the following 1-fluid flow is important in casting ?

C. what is the purpose of tapering of sprue in casting give reason to your answer?

 

Answer -

A. casting parameter influence fluidity of metal is :-

1.model design

2. molding material and its surface characteristics

3. degree of superheat

4. rate of pouring

5. heat transfer

 

B. fluidity of molten metal is important in casting because the molten metal have high fluidity then it will fill the mould cavity properly but if the fluidity is not sufficient then the mould cavity will not fill properly by the molten metal and fluid will solidify before filling the mold cavity

 

C. to avoid aspiration the taper shape sprew are designed because sprue has small cross sectional area at the bottom due to it small size it creates Choke which helps to keep the sprue pool of molten metal.