Pr. Casting Processes Flashcards
1
Q
What is a closed mold?
A
A mold where the incoming material is limited/controlled by a gate which changes its rate etc.
2
Q
Why are expendable molds named as such?
A
As often they are destroyed in the process of getting the cast component
3
Q
What is Chorinov’s Rule?
A
Solidification Time = Mold Constant x (Volume of the cast/SA of the cast)^n (n normally = 2)
4
Q
What component of a closed mold is used to mitigate shrinkage?
A
The riser. It has a higher solidification time so as to allow it to keep feeding molten material into the cast after said material has already somewhat solidified.
5
Q
What material factor is used to reverse engineer the suitable size of a mold to counteract shrinkage?
A
The thermal expansion coefficient.
