Question

Which of the following methods is used for trapping the slag from entering steel casting into the mould?

(a) Finn’s method

(b) Down gate method

(c) Whirl gate method

(d) Euler’s method

This question was addressed to me by my college director while I was bunking the class.

I'd like to ask this question from Gating Design topic in chapter Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

Answer 1

The correct answer is (c) Whirl gate method

Explanation: Whirl gate method utilizes the principle of centrifugal action to throw the dense metal to the periphery and retain the lighter slag at the centre. Also, the metal revolves 270 degree before reaching the exit gate so as to gain enough time for separating the impurities.