Question

Which of the following is a limitation of die casting, but is overcome in vacuum die casting?

(a) The air left in the cavity when the die is closed

(b) The moisture left in the cavity when the die is closed

(c) The air left in the cavity when the die is open

(d) The moisture left in the cavity when the die is open

I have been asked this question by my college director while I was bunking the class.

My question is based upon Special Casting Techniques topic in section Special Casting Techniques of Casting-Forming-Welding I

Answer 1

Right option is (a) The air left in the cavity when the die is closed

The explanation is: In die casting the major problem is the air left inside the cavity when the die is closed, but in the case of vacuum die casting this air is evacuated out.