PURPOSE: To produce insert parts which prevent the damage from the end part of a base insert material, by enclosing the end part of the base insert material with an insert metal.
CONSTITUTION: A ceramic fiber molding 11 conforming to the shape of an exhaust port 17 in the cylinder head of an internal combustion engine is formed, and tapered cut parts 12, 12 are provided on the inside circumference in the end part thereof. Such molding 11 is set in a core pattern for casting the exhaust port, and a core 13 for the exhaust port is formed by copacking using prescribed molding sand. The core 13 is set in a casting mold 14, and the melt of an insert metal is charged into the cavity 15 thereof. Then, the metal 16 runs from the end face of the molding 11 to the inside of a cut part 12, by which the end part of the molding 11 is enclosed and the molding 11 is securely restrained.
| WO/2008/011863 | METHOD FOR PRODUCING A CAST COMPONENT WITH A CAST-IN PIPE |
| JP2000506243 | [Title of the Invention] Mechanical casing of a reciprocating piston type machine |
| JP2014084517 | MASKING AGENT |
TOKUMOTO MASAAKI
TAKEDA ISAO
