| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of casting a die for tire molding where countermeasures to casting defects and structural abnormality can be easily and effectively taken. <P>SOLUTION: In the method of casting a die for tire molding using a gypsum mold 4, a spot facing slot 12 with a diameter of ≥1 mm opened to the surface of the gypsum mold 4 corresponding to the surface on the side of the designed face in the die a for tire molding and having a termination part at the inside of the mold 4 is formed, and casting is performed in a stage where the spot facing slot 12 is opened. Fine shrinkage cavities easy to be generated, e.g., at the inside of a casting bone on the surface at the side of the designed side in the die a for tire molding are collected on the spot facing slot 12 opened later, thus structure at the inside of the casting bone can be made into the sound one. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
