公开(公告)号：US20230330744A1

公开(公告)日：2023-10-19

申请号：US17719737

申请日：2022-04-13

Applicant: GM Global Technology Operations LLC

Inventor： Liang Wang ,  Qigui Wang ,  Dale A. Gerard ,  Steven L. Burkholder ,  Ronald C. Daul

IPC: B22D15/02 ,  B22C9/06 ,  B22C9/10 ,  B22C3/00 ,  B22C9/02

CPC classification number: B22D15/02 ,  B22C9/061 ,  B22C9/101 ,  B22C3/00 ,  B22C9/02

Abstract: A low-pressure sand-casting system includes a sand-casting mold receiving a molten casting material to cast an automobile vehicle cylinder head. A port is created in the automobile vehicle cylinder head. A manifold port metal core assembly includes a metal core. A compressible material coating is applied on the manifold port core metal core.