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Porous sintered materials can be inserted into the mould cavity to act as a vent.

(a) True

(b) False

I got this question in exam.

Enquiry is from Venting of Moulds in division Mold and Mold Making of Casting-Forming-Welding I

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The correct choice is (a) True

To elaborate: Porous sintered materials can be placed in the mould cavity to act as a vent. It mainly depends on the thickness of the porous material used. More the thickness, then less will be the venting capacity. So venting passages should be machined properly to collect the gases, proper cleaning of vents is also important as the gas deposits can block the passages.

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