The process which spherical sections where the bentonite 20 mass

摘要

PROBLEM TO BE SOLVED: To improve the stickiness on the other metal which can arrange a plurality of projections having a desired shape of undercut part on the surface of a cast-in member in a simple process.;SOLUTION: Facing agent 30 is coated on the inner peripheral surface 34 of a mold 30. The facing agent 36 is formed as a plurality of spherical parts 36b, and molten cast iron 40 is poured into this mold 30 while rotating the mold 30 under state of replacing into inert gas in the mold 30. The molten iron 40 is filled up to the undercut parts 36c while covering the spherical parts 36b.;COPYRIGHT: (C)2004,JPO