(Solved): 2.4. A spool shown in Figure Q2-4 is to be sand cast out of steel. i. Show schematically a cross se ...

2.4. A spool shown in Figure Q2-4 is to be sand cast out of steel. i. Show schematically a cross sectional view of the sand mould for the spool and name/label all elements of the mould. ii. Make a sketch of the wooden pattern for this part, including all necessary allowances for shrinkage and machining. Machining allowances for this casting on outside surfaces is $3\mathrm{mm}$. The normal shrinkage allowance for cast steel is $20\mathrm{mm}/\mathrm{m}$. Figure Q2-4 (*-machined surfaces, all dimensions are in mm)