METHOD FOR MANUFACTURING TURBOCHARGER BEARING HOUSING, AND TURBOCHARGER BEARING HOUSING

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a turbocharger bearing housing capable of preventing damage of a collapsing core when molten metal is cast in a mold.SOLUTION: In a method for manufacturing a turbocharger 10 bearing housing 20, in the interior of which a cooling passage 33 for circulating a cooling liquid is formed by casting using a collapsing core 50, the collapsing core 50 is provided with: end-forming sections (a one end-forming section 52 and an other end-forming section 53) that correspond to the end of the cooling passage 33 and are formed so as to have substantially elliptical cross-section; and a fixing section 54 that holds the end-forming sections, is embedded in a mold 60 and is fixed to the mold 60.