Mold for manufacturing an engine casting part for a vehicle from vermicular cast iron alloy, process for manufacturing an engine casting part for a vehicle from vermicular cast iron alloy, and process for assembling a vehicle engine by the combination of parts made from vermicular cast iron alloy and parts made from composites

Mold for manufacturing vehicle engine cast part with vermicular cast iron alloy, CHARACTERIZED by comprising:

• modular external elements and sand core internal elements manufactured separately,
• wherein at least one mold element is manufactured by additive manufacturing, and the elements are assembled to form a casting cavity for the casting of a part;
• wherein the mold elements provide a part of variable wall thickness, the wall thickness being at least 1.5 mm, and wherein the mold elements change the temperature and filing velocity of a cast iron alloy during pouring and change the cooling rate of the cast part after the pouring;
• wherein the casting cavity of the mold has regions of allowance for final machining and contours with regions for deposition of fillets.