How to make tire bladder mold?

1. This utility model relates to the technical field of tire molds, specifically to tire bladder molds.

2. The tire bladder is a tool used for tire vulcanization. The main function of the tire bladder is to inflate compressed air, nitrogen or superheated water inside the tire during the tire vulcanization process to make it stretch and support the tire rubber blank to form internal pressure to facilitate the tire vulcanization. Vulcanized tires are equivalent to the inner mold of the tire mold. Tire bladder mold, as the name suggests, refers to the mold used to vulcanize tire bladders.

3. At present, there are two main structures of the vulcanization molds for tire bladders used in the tire vulcanization of engineering machinery in China. One is a molded steamer structure, and the other is a molded hot plate structure. As shown in Figure 1, a tire capsule mold with a pressed hot plate structure is usually composed of an upper mold 1, a lower mold 2 and a core mold 3. The upper mold 1, the lower mold 2 and the core mold 3 together form a tire capsule-shaped cavity 4.

4. When using a vulcanization mold with a molded hot plate structure, the vulcanization temperature of the tire bladder is about 200°C. After taking out the vulcanized tire bladder, the temperature of the tire bladder mold is too high and the rubber cannot be placed immediately to proceed to the next tire. In the actual production process, the vulcanization of the bladder generally requires more than 2 hours. Only when the temperature of the module where the rubber is placed on the tire bladder mold drops below 145°C can the rubber be placed and the next tire bladder vulcanized. The existing production method not only wastes a lot of time on the heat dissipation and cooling of the tire capsule mold, seriously reducing the production efficiency, but also during the heat dissipation and cooling process of the module where the rubber is placed on the tire capsule mold, the entire tire capsule mold The heat energy will continue to be emitted, and a large amount of heat energy will be wasted.

5. However, if the module where the rubber material is placed is not cooled down, the rubber material will begin to vulcanize rapidly after contacting the high-temperature module, resulting in a layer of rubber material. Once the layer of rubber material enters the tire capsule mold cavity, it will interact with the tire. If the rubber material of the capsule is mixed together, it is possible to reduce the quality of the tire capsule and even cause the tire capsule to be scrapped.

Technical implementation elements:

6. Regarding the problems existing in the prior art, the tire capsule mold provided by the present utility model solves the problems of low production efficiency and energy waste caused by the tire capsule mold needing to be shut down for a long time for cooling when the tire bladder is vulcanized. It not only improves It improves production efficiency, saves heat and energy, and can control the temperature more accurately, improving the quality of the tire capsule.

7. In order to achieve the above purpose, the technical solutions adopted by this utility model are as follows:

8. The tire capsule mold provided by the utility model includes an upper mold, a lower mold and a core mold. The tire capsule mold has a mold closing state and a mold opening state. In the mold closing state, the upper mold and the The lower mold is closed, and the upper mold, the lower mold and the core mold form the cavity of the tire capsule; in the mold opening state, the upper mold and the lower mold are opened, and the lower mold A rubber storage tank connected to the mold cavity is formed between the core mold and the mold cavity. At least part of the rubber storage tank is provided with a cooling chamber.

9. As a preferred technical solution, in the mold closing state, the cooling chamber is also provided in the mold body of the upper mold that is in contact with the rubber storage tank.

10. As a preferred technical solution, the upper mold includes an upper mold molding surface, and the lower mold includes a lower mold molding surface,

In the mold closing state, the molding surface of the upper mold is close to the molding surface of the lower mold, and a retaining ring is provided on the molding surface of the lower mold on the side away from the core mold. The ring, the molding surface of the lower mold and the outer surface of the core mold close to the molding surface of the lower mold form the rubber storage groove.

11. As a preferred technical solution, the cooling chamber includes at least one sub-cooling chamber, and each sub-cooling chamber is provided with a cooling inlet and a cooling outlet.

12. As a preferred technical solution, the sub-cooling chamber includes at least one cooling pipe, and the cooling pipes are each connected to the cooling inlet and the cooling outlet.

13. As a preferred technical solution, when the cooling chamber only includes one sub-cooling chamber and the sub-cooling chamber only includes one of the cooling pipes, the cooling pipes are arranged along the periphery of the mold cavity. directional distribution;

14. When the cooling chamber only includes one sub-cooling chamber and the sub-cooling chamber includes a plurality of cooling pipes, the plurality of cooling pipes are distributed along the radial direction of the mold cavity.

15. As a preferred technical solution, the cross-sectional area of the cooling inlet and the cooling outlet is no greater than the sum of the cross-sectional areas of all the cooling pipes in the sub-cooling chamber.

16. As a preferred technical solution, when the cooling chamber includes a plurality of sub-cooling chambers, the sub-cooling chambers are distributed along the circumference of the mold cavity.

17. As a preferred technical solution, the upper mold, the lower mold and the core mold are all provided with steam chambers, and the steam chambers are equipped with steam inlet and steam outlets connected to the steam chamber. Mouth.

18. As a preferred technical solution, a temperature measuring hole is provided in the tank body of the rubber storage tank and/or in the mold body of the upper mold provided with the cooling chamber.

19. The beneficial effects of this utility model are as follows:

20.1. This utility model can quickly dissipate heat and cool down the rubber storage tank where the rubber is placed by passing the heat exchange medium into the cooling chamber located in the tank body of the rubber storage tank, effectively solving the problem when the tire bladder is vulcanized. , the tire capsule mold needs to be shut down for a long time for cooling, which causes low production efficiency and energy waste. It not only improves production efficiency, but also saves heat and energy.

21.2. The cooling pipes in the cooling chamber of the present utility model are distributed along the circumference of the mold cavity. They are welded to the upper or lower mold body during production. They have high strength and good rigidity, which can ensure the cooling of the rubber storage tank. Uniform and consistent temperature.

22.3. By arranging a temperature sensor in the temperature measuring hole, this utility model can quickly and conveniently realize the accurate detection of the mold temperature during vulcanization and the temperature of the rubber storage tank during cooling, and can improve the vulcanization quality of the tire bladder.

23.4. This utility model has a simple structure and is easy to operate, which greatly saves operating time and improves production efficiency.