Question

Which of the following techniques is used for smoothening of the rough cut gate edges on the castings?

(a) Hack sawing

(b) Flame cutting

(c) Sand blasting

(d) Pedestal or swing frame grinding

The question was asked in an interview for job.

My question is based upon Casting Cleaning in section Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

Answer 1

Right option is (d) Pedestal or swing frame grinding

For explanation I would say: The casting surface after removal of gates contain some rough surfaces left at the time of removal of gates, or some fins and other projections on the surface near the parting line. These rough cut gate edges can be smoothened by using either the pedestal or swing frame grinder depending on the size of the casting.