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In vacuum die casting, the molten metal does not experience any back pressure while injecting it into the die cavity.

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in Casting-Forming-Welding I by (687k points)
In vacuum die casting, the molten metal does not experience any back pressure while injecting it into the die cavity.

(a) True

(b) False

I had been asked this question at a job interview.

This interesting question is from Vacuum Die Casting topic in chapter Special Casting Techniques of Casting-Forming-Welding I

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The correct answer is (a) True

To explain: In vacuum die casting, before the injection of molten metal, all the air presents in the die cavity is evacuated and then the die is closed. So by performing this operation, the molten metal does not experience any back pressure while injecting it into the die cavity, this makes the process easier.

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