Question

What are sweep patterns used for?

(a) Piston rings for IC engine

(b) Circular castings in loam molding

(c) Symmetrically shaped castings

(d) Drainage fittings

I got this question during an internship interview.

I need to ask this question from Pattern Making in chapter Testing of Materials, Foundry & Powder Metallurgy of Engineering Material & Metallurgy

Answer 1

Right answer is (b) Circular castings in loam molding

The explanation is: Sweep patterns are used to generate surfaces of revolution like a cylinder and sphere. They are used to make large and circular castings in loam molding. Piston rings of IC engine can be made by match plate pattern, whereas drainage fittings can be made by using a shell pattern.