Question

Dry sand cores are widely used in the injection moulding process for casting various polymers.

(a) True

(b) False

I had been asked this question by my college professor while I was bunking the class.

Query is from Core Application in section Core and Core Making of Casting-Forming-Welding I

Answer 1

Right option is (b) False

To explain: In the injection moulding process, alloy cores are used in the moulding box instead of any sand cores. In the process, the plastic is getting injected into the moulding box and then after solidification, the casted polymer is taken out from the moulding box with the cores still in it. And then the core is melted and washed out from the moulding box.