| 摘要 |
PROBLEM TO BE SOLVED: To provide a process of manufacturing a mold for vulcanizing and molding a tyre which can assure air leakage by a good casting patch section by preventing a misrun at the time of a first shot and a second shot casting from occurring. SOLUTION: Mold parts 14 for composing a spatialization section 13 at the time of the second shot casting beforehand is detachably mounted in a space 12 of a first shot pattern mold 9 of first split molds 7a and 7b by the first shot casting. When releasing from the mold after the first shot casting is conducted in this state, the mold parts 14 are left in a first shot piece block 8a, and the block 8a is released. For making the first shot piece block 8a which was released from the first split molds 7a and 7b, into a using state at the time of the second shot casting as shown in Fig. 1(d), the mold parts 14 which are fitted to the spatialization section 13 of the first shot piece block 8a is removed by engaging a drawing tool 15, such as a bolt, with a drawing hole 15a formed beforehand in the mound parts 14. COPYRIGHT: (C)2004,JPO |
