Question

Which of the following methods is best for cleaning of sand particles sticking to the casting surface?

(a) Chipping

(b) Sand blasting

(c) Grinding

(d) Hammering

The question was posed to me by my college professor while I was bunking the class.

My question is taken from Casting Cleaning in portion Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

Answer 1

Right option is (b) Sand blasting

The best I can explain: For cleaning the sand particles sticking to the casting surface, sand blasting is used. The casting is kept in a closed box and a jet of compressed air with a blast of sand grains or steel grit is directed against the casting surface, which thoroughly cleans the casting surface.