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Vacuum technology for venting process is very economical and widely used in the casting process.

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in Casting-Forming-Welding I by (687k points)
Vacuum technology for venting process is very economical and widely used in the casting process.

(a) True

(b) False

I got this question during an online exam.

My enquiry is from Venting of Moulds topic in division Mold and Mold Making of Casting-Forming-Welding I

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Best answer
Right answer is (b) False

The explanation: Vacuum technology for venting process includes removing of gases from the cavity before the pouring of molten metal. This actually generates a vacuum inside the cavity for which the cavity must be sealed completely. And although vacuum technology may solve gases problems, it is not effective in dealing with gas produced during pouring, so this process is not economical and cannot be used conventionally.

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