| 摘要 |
An object of the present invention is to provide a die and a method for manufacturing a core, wherein the core includes a ring-shaped supporting member 16 that is formed by a plate-like member, that is disposed inside a pneumatic tire, and that supports a pneumatic tire by allowing an inner side of a tread portion of the pneumatic tire to be brought into contact with an outer peripheral surface of the supporting member at the time of a deformation of the pneumatic tire due to a decrease of an internal pressure of the tire, and ring-shaped rubber portions that are joined respectively to both widthwise direction edge portions of the supporting member. A pressing machine 10 includes a ring-shaped core die 26 that is brought into contact with the supporting member 16 from a radial direction inner side thereof to support the supporting member 16 while maintaining a non-contact state with the both widthwise direction edge portions of the supporting member 16 , and an upper intermediate die 28 and a lower intermediate die 30 that are disposed so as to hold the core die 26 therebetween from a widthwise direction of the core die 26 and that form cavities 42 A and 42 B for the rubber portions between the upper intermediate die 28 and the core die 26 as well as between the lower intermediate die 30 and the core die 26 . The rubber material G contained in the pod portions 46 A 1, 46 A 2, 46 B 1 and 46 B 2 formed at the dies 28 and 30 are transferred from runners 44 A 1, 44 A 2, 44 B 1 and 44 B 2 into cavities 42 A and 42 B.
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