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CN-224224590-U - Nitrogen heating system and tire vulcanizing equipment

CN224224590UCN 224224590 UCN224224590 UCN 224224590UCN-224224590-U

Abstract

The utility model belongs to the technical field of tire vulcanization equipment, and discloses a nitrogen heating system and tire vulcanization equipment. The nitrogen heating system can inject heated nitrogen into the capsule of the tire vulcanizing equipment, so that the capsule is expanded and the green tire is attached to the cavity of the mold of the tire vulcanizing equipment. The nitrogen heating system provided by the utility model can enable the temperature and the pressure in the vulcanization process to be respectively and independently adjusted according to the rubber crosslinking dynamics requirement and the tire blank attaching pressure requirement, so that the risk of over-sulfur or under-sulfur caused by the passive change of the temperature in the pressure adjustment in the traditional process is avoided. In addition, the energy loss and the local low-temperature defect that the steam contacts the surface of the low-temperature mold to be condensed into liquid water in the traditional process are avoided, so that the sulfuration uniformity can be improved, and the defective rate is reduced.

Inventors

  • LIU BAOLONG
  • LI WEINAN
  • HUANG GUIQIANG
  • WANG CHAOQIANG
  • YOU BIN
  • LI XIANGCHEN

Assignees

  • 华澳科技(苏州)股份有限公司

Dates

Publication Date
20260512
Application Date
20250520

Claims (8)

  1. 1. The utility model provides a nitrogen gas heating system, its characterized in that, nitrogen gas heating system can pour into the nitrogen gas after heating into capsule (100) of tire vulcanization equipment into, makes capsule (100) inflation and laminate the child base in the die cavity of tire vulcanization equipment's mould (200), nitrogen gas heating system includes nitrogen gas supply unit (1), circulation pipeline (2), heating unit (3) and control valves (4), wherein: The nitrogen supply unit (1), the control valve group (4) and the capsule (100) are all communicated with the circulation pipeline (2), and the nitrogen supply unit (1) is configured to supply nitrogen to the capsule (100) through the circulation pipeline (2) and is configured to drive the nitrogen to circulate in the circulation pipeline (2); The part of the circulation pipeline (2) between the nitrogen supply unit (1) and the capsule (100) is a supply section, and the heating unit (3) is configured to heat nitrogen flowing through the supply section; The control valve group (4) is configured to control the nitrogen pressure within the capsule (100).
  2. 2. A nitrogen heating system according to claim 1, characterized in that the nitrogen heating system comprises an auxiliary heating unit (5) located inside the capsule (100), the auxiliary heating unit (5) being configured to heat the capsule (100) and/or to heat nitrogen flowing into the interior of the capsule (100).
  3. 3. A nitrogen heating system according to claim 2, wherein said heating unit (3) comprises at least one heating assembly (31) located outside said capsule (100).
  4. 4. A nitrogen heating system according to claim 2, wherein the circulation line (2) comprises an output (21) extending into the capsule (100), the output (21) being located on the central expansion axis of the capsule (100).
  5. 5. A nitrogen heating system according to claim 4, wherein the output portion (21) is arranged in a hollow cylindrical shape, and the axis of the output portion (21) is arranged along the expansion center axis of the capsule (100), and the output portion (21) includes a plurality of outlets uniformly distributed on the outer periphery thereof.
  6. 6. A nitrogen heating system according to claim 5, wherein the auxiliary heating unit (5) comprises a heating element provided on the outer periphery of the output portion (21).
  7. 7. A nitrogen gas heating system according to claim 3, characterized in that the heating unit (3) comprises a heating tank connected in series to the supply section, which heating tank heats the nitrogen gas flowing through its interior.
  8. 8. Tyre vulcanisation apparatus comprising a mould (200), a bladder (100) and a nitrogen heating system according to any of claims 1 to 7, which expands the bladder (100) and adheres the green tyre to the cavity of the mould (200) by injecting heated nitrogen into the bladder (100).

Description

Nitrogen heating system and tire vulcanizing equipment Technical Field The utility model relates to the technical field of tire vulcanization equipment, in particular to a nitrogen heating system and tire vulcanization equipment. Background Tire vulcanization is a key process for forming a final product by crosslinking reaction of a green tire through heating and pressurizing, wherein a bladder vulcanizing machine is widely applied due to compact structure and accurate pressure control. The process is to inject heating and pressurizing medium (such as steam, nitrogen, etc.) into the capsule to expand the capsule and attach the green tyre to the cavity of the mould, so as to realize the vulcanization of the tyre. The heating and pressurizing medium adopted by the mainstream technology in the industry at present is generally a combination of saturated steam and nitrogen, wherein the saturated steam is used as a main heat source, the heat required by the vulcanization reaction is provided by heat conduction, and the nitrogen is used for maintaining the pressure in the capsule, so that the continuous fit of the green tire and the mold is ensured. However, the temperature and pressure of saturated steam are in thermodynamic conjugate relationship (for example, 1.0MPa corresponds to 184 ℃), so that the temperature and pressure cannot be independently controlled when the process parameters are adjusted. When it is desired to optimize the vulcanization pressure to improve the carcass compactness, the simultaneous variation of temperature may disrupt the dynamic balance of the rubber crosslinking reaction, triggering the risk of oversulfur or undersulfur. Meanwhile, after the steam is injected into the capsule, the steam is quickly condensed when contacting the low-temperature mould and the inner wall of the tire blank, so that liquid condensed water is formed to be gathered at the side part of the capsule (especially in a complex tread structure or a thick-wall area), and the temperature difference between the upper side part and the lower side part is larger, thereby affecting the uniformity of vulcanization and further increasing the defective rate. Therefore, the above-described problems are to be solved. Disclosure of utility model The utility model aims to provide a nitrogen heating system and tire vulcanizing equipment, so as to avoid the risk of over-sulfur or under-sulfur caused by passive temperature change when pressure is regulated in the traditional process, and improve the uniformity of vulcanization to reduce the defective rate. To achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a nitrogen gas heating system, nitrogen gas heating system can pour into the nitrogen gas after the heating into the capsule of tire vulcanization equipment into, makes the capsule inflation and with the child base laminating in the die cavity of tire vulcanization equipment's mould, nitrogen gas heating system includes nitrogen gas supply unit, circulation line, heating unit and control valves, wherein: The nitrogen supply unit, the control valve group and the capsule are all communicated with the circulating pipeline, and the nitrogen supply unit is configured to supply nitrogen to the capsule through the circulating pipeline and is configured to drive the nitrogen to circulate in the circulating pipeline; The part of the circulating pipeline between the nitrogen supply unit and the capsule is a supply section, and the heating unit is configured to heat nitrogen flowing through the supply section; The control valve set is configured to control the nitrogen pressure within the capsule. Preferably, the nitrogen heating system comprises a secondary heating unit located inside the capsule, the secondary heating unit being configured to heat the capsule and/or to heat nitrogen flowing into the capsule interior. Preferably, the heating unit comprises at least one heating assembly located outside the capsule. Preferably, the circulation line comprises an output portion extending into the capsule, the output portion being located on the central inflation axis of the capsule. Preferably, the output part is arranged in a hollow cylinder shape, the axis of the output part is arranged along the expansion central axis of the capsule, and the output part comprises a plurality of outlets uniformly distributed on the periphery of the output part. Preferably, the auxiliary heating unit includes a heating member provided on an outer periphery of the output portion. Preferably, the heating unit includes a heating tank connected in series to the supply section, the heating tank heating nitrogen flowing through the inside thereof. The tire vulcanizing device comprises a die, a capsule and the nitrogen heating system, wherein the nitrogen heating system is used for injecting heated nitrogen into the capsule to expand the capsule and attach a green tire to a cavity of the die. The utility mo