| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a mold for molding tire capable of simply, efficiency and inexpensively manufacturing a split vent type tire mold capable of discharging air in a closed space to the outside from the slit like air vents arranged in the gaps formed between mutual partial molds using a gypsum cating method. SOLUTION: In a manufacturing method for a mold for molding a tire, a partition wall 5 with a thickness of 0.08 mm or less is driven in and fixed to a predetermined place of a the profile surface of a partial casting mold 1 combined with the shape of a whole casting mold 2 so that one leading end of the other end part is held to a distance of 10 to 50 mm from the inner surface of a casting mold and the other leading part is driven and fixed in the direction vertical to the profile surface of the partial casting mold 1 to perform casting in such a state that partial casting mold is in a partitioned state. The obtained cast article 8 is detached from a partition wall to be divided into piece cast articles 9 and the piece cast articles 9 are combined so as to become a tire reversal mold shape in a state such that the gap 10 corresponding to the thickness of a partition wall for venting air is formed between piece cast articles 9. COPYRIGHT: (C)2004,JPO |
