CASTING METHOD OF ENGINE BLOCK

摘要

PROBLEM TO BE SOLVED: To provide a sand mold which improves a machining accuracy for a cast V-shaped block. SOLUTION: A package of casting molds of engine block is equipped with barrel crank case cores with plural barrels and a respective cylinder bore line is arranged on each of these barrels. The respective cylinder bore liner is equipped with the bore tapered at least some part on its length in order to fit a draft angle given to a barrel to make it possible to take out the barrel crank case core from the core box where the barrel crank case is formed.