Electric heating vulcanizing device

Abstract

The utility model discloses an electric heating vulcanizing device, which comprises a vulcanizing mold, a heating device, a heating device and a driving device, wherein a vulcanizing cavity for placing a tire and a vulcanizing bladder is arranged in the vulcanizing mold; the center mechanism comprises a center rod and a ring seat arranged on the center rod, and a clamping device for clamping the vulcanizing capsule is arranged on the ring seat; an air inlet pipe is clamped to the lower portion of the ring seat, an exhaust hole is further formed in the ring seat, and the lower end of the exhaust hole is connected with an exhaust pipe. The heater and the circulating fan are mounted between the first nitrogen circulating control valve and the nitrogen inlet valve; the cooling medium inlet pipe is mounted between the first nitrogen circulation control valve and the gas inlet hole; the cooling medium outlet pipe is mounted between the second nitrogen circulation control valve and the exhaust hole; and the nitrogen return pipe and the cooling medium outlet pipe are connected in parallel at one side of the exhaust pipe. After vulcanization is finished, nitrogen is recovered, so that the cooling time of a cooling medium is shortened, the energy consumption is reduced, and the cooling efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of vulcanizing machine technology, and specifically relates to an electrically heated vulcanizing device. Background Technology

[0002] In the tire manufacturing industry, vulcanization is a crucial process that determines the physical properties and lifespan of a tire. The vulcanization process involves heating the tire materials (such as rubber and cord) to cause a chemical reaction, forming a cross-linked structure that enhances the tire's strength, wear resistance, and airtightness. With technological advancements, electrically heated vulcanizing devices have gradually become the mainstream due to their advantages such as uniform heating and precise control.

[0003] Currently, electric heating vulcanizing equipment on the market mainly adopts two types of circulating heating methods: internal circulation and external circulation.

[0004] The internal circulation method directly heats the introduced nitrogen gas by installing a heating device on the top surface of the central mechanism inside the bladder. Nitrogen gas, acting as a heat transfer medium, circulates within the bladder, transferring heat to the tire and completing the vulcanization process. The advantage of this method is its high heating efficiency and ability to ensure uniform temperature distribution inside the tire. However, after vulcanization, the high-temperature environment inside the tire and bladder requires a prolonged period of natural cooling for safe tire removal. This process significantly extends the entire vulcanization cycle and reduces production efficiency.

[0005] The external circulation method differs in that it places the heating mechanism on the outside of the bladder, using heating elements to heat the nitrogen gas at high temperatures. The high-temperature nitrogen gas then enters the bladder through specific pipes to vulcanize the tire. While this method avoids material damage that might occur from direct contact between the heating elements and the tire, it still faces the problem of a long cooling time after vulcanization.

[0006] To address the aforementioned issue of long cooling times, publication number CN116787828A proposes a new energy vulcanization system with cooling pipelines. This system controls the nitrogen circulation path by switching different on / off valves to achieve the switching between heating and cooling. However, this system requires processing the nitrogen gas throughout the entire nitrogen passage during both heating and cooling stages, which not only increases energy consumption but also requires improvement in heating and cooling efficiency. Specifically, since the nitrogen passage includes multiple parts such as the outlet of the gas circulation pump, the inlet pipeline, the vulcanizing bladder, the exhaust pipeline, and the inlet of the gas circulation pump, heating and cooling require raising or lowering the nitrogen gas throughout the entire passage. This not only leads to significant energy consumption but also, due to the long nitrogen passage, affects the efficiency of tire vulcanization. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an electrically heated vulcanizing device that improves vulcanizing cooling efficiency while reducing energy consumption.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] An electrically heated vulcanizing apparatus, comprising:

[0010] A vulcanizing mold, wherein the vulcanizing mold has a vulcanizing cavity inside for placing a tire and a vulcanizing bladder;

[0011] The central mechanism includes a central rod and a ring seat mounted on the central rod. The ring seat is equipped with a clamping device for holding the vulcanizing capsule. The ring seat is engaged with an air inlet pipe, which is equipped with a nitrogen inlet valve and a first nitrogen circulation control valve. The ring seat has an internal gas distribution channel communicating with the air inlet pipe, and the ring seat has several air inlets communicating with the gas distribution channel. The ring seat also has an exhaust port, the lower end of which is connected to an exhaust pipe, and the exhaust pipe is equipped with a second nitrogen circulation control valve.

[0012] The heater and circulating fan are installed between the first nitrogen circulation control valve and the nitrogen inlet valve to heat nitrogen during tire vulcanization operations. One end of the exhaust pipe is connected to the air inlet of the circulating fan.

[0013] The cooling medium inlet pipe is installed between the first nitrogen circulation control valve and the air inlet. One end is connected to the cooling medium storage tank, and the other end is connected to the air inlet pipe. A cooling inlet control valve is provided on the cooling medium inlet pipe.

[0014] The cooling medium outlet pipe is installed between the second nitrogen circulation control valve and the exhaust port. One end is connected to the cooling medium storage tank, and the other end is connected to the exhaust pipe. A cooling return control valve is connected to the cooling medium outlet pipe.

[0015] It also includes a nitrogen return pipe, which is connected in parallel with the cooling medium outlet pipe on one side of the exhaust pipe, with one end connected to the nitrogen storage tank, and a nitrogen return valve is provided on the nitrogen return pipe.

[0016] Furthermore, a vacuum pipe is provided on one side of the exhaust pipe, which is connected in parallel with the cooling medium outlet pipe and the nitrogen return pipe. A vacuum valve is provided on the vacuum pipe. After the vulcanizing capsule is cooled, the vacuum valve is opened and other valves are closed to extract the cooling medium inside the vulcanizing capsule.

[0017] Furthermore, the cooling medium is either a coolant or a cooling gas.

[0018] Furthermore, when the cooling medium is a cooling gas, nitrogen is used as the cooling medium.

[0019] Furthermore, the plurality of air inlets are evenly arranged on the side wall of the ring seat, and the openings of the air inlets face the oblique downward of the ring seat.

[0020] Furthermore, the vent hole is flush with or lower than the top of the ring seat.

[0021] Furthermore, a circulation pipe is connected between the intake pipe and the exhaust pipe. The circulation pipe is equipped with a third nitrogen circulation control valve. One end of the circulation pipe is located between the heater and the first nitrogen circulation control valve, and the other end of the circulation pipe is located between the circulation fan and the second nitrogen circulation control valve. Before tire vulcanization, the nitrogen intake valve and the third nitrogen circulation control valve are opened first, and other valves are closed. Then, the heater and the circulation fan are started to preheat the nitrogen.

[0022] The beneficial effects of this utility model are:

[0023] 1) After vulcanization, the present invention recovers nitrogen gas. After the nitrogen gas is recovered, there is no or only a small amount of high-temperature nitrogen gas inside the vulcanizing capsule, which reduces the cooling time of the cooling medium, reduces energy consumption, and improves cooling efficiency. In addition, when vulcanization is performed again, only the nitrogen gas in the air inlet pipe, vulcanizing capsule and exhaust pipe needs to be circulated and heated, without heating the cooling medium, which further reduces energy consumption and production costs and improves the efficiency of the entire vulcanization and cooling process.

[0024] 2) By setting up a vacuum tube, after the vulcanizing capsule cools down, the cooling medium inside the vulcanizing capsule is extracted, and the vulcanizing capsule changes from an inflated state to a flat state, making it easier to remove the tire; in addition, after vacuuming, the cooling medium is prevented from remaining inside the vulcanizing capsule, further reducing the energy consumption and time of subsequent tire vulcanization operations.

[0025] 3) Multiple air inlets are evenly arranged on the side wall of the ring seat, and the openings of the air inlets are designed to face the lower part of the ring seat. This ensures that high-temperature nitrogen or cooling medium can enter the vulcanizing capsule evenly and fully, ensuring the uniformity and consistency of the vulcanization process, while improving the cooling efficiency of the vulcanizing capsule.

[0026] 4) The top of the vent hole is not higher than the top of the ring seat, which facilitates the rapid discharge of high-temperature nitrogen or cooling medium inside the vulcanizing capsule, avoiding uneven temperature or medium residue caused by accumulation.

[0027] 5) By setting up a circulation pipe, preheating before vulcanization is achieved, which improves the efficiency of formal heating. Moreover, nitrogen preheating and vulcanization capsule cooling can be carried out simultaneously and independently. After the vulcanization capsule cools down, the vulcanization operation of the next tire can be carried out directly, which shortens the capsule heating time and improves vulcanization efficiency. Attached Figure Description

[0028] AppendixFigure 1 This is a schematic diagram of an electrically heated vulcanizing device according to the present invention.

[0029] Appendix Figure 2 This is a schematic diagram of the ring seat structure.

[0030] In the diagram, 1. Vulcanizing mold; 2. Central mechanism; 21. Ring seat; 211. Air inlet; 212. Exhaust outlet; 213. Gas distribution channel; 214. Clamping device; 22. Central rod; 23. Air inlet pipe; 231. Nitrogen inlet valve; 232. First nitrogen circulation control valve; 24. Exhaust pipe; 241. Second nitrogen circulation control valve; 3. Heater; 4. Circulating fan; 5. Cooling medium inlet pipe; 51. Cooling inlet control valve; 6. Cooling medium outlet pipe; 61. Cooling return control valve; 62. Vacuum pipe; 63. Vacuum valve; 64. Nitrogen return pipe; 65. Nitrogen return valve; 7. Circulation pipe; 71. Third nitrogen circulation control valve; 8. Vulcanizing capsule. Detailed Implementation

[0031] The following will be combined with the appendix Figures 1-2 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] like Figure 1 As shown, an electrically heated vulcanizing device includes: a vulcanizing mold 1, a central mechanism 2, a heater 3, a circulating fan 4, a cooling medium inlet pipe 5, a cooling medium outlet pipe 6, and a nitrogen return pipe 64. The vulcanizing mold 1 is openable and closable, and has a vulcanizing cavity inside for placing a tire and a vulcanizing capsule 8. The central mechanism 2 includes a central rod 22 and an annular seat 21 disposed on the central rod 22. The annular seat 21 is provided with a clamping device 214 for sealingly installing the vulcanizing capsule 8 into the vulcanizing cavity. An air inlet pipe 23 is snapped into the lower part of the annular seat 21. A nitrogen inlet valve 231 is provided at the lower end of the air inlet pipe 23, and a first nitrogen circulation control valve 232 is provided on one side of the nitrogen inlet valve 231. Figure 2 As shown, the ring seat 21 has an air distribution channel 213 that communicates with the air inlet pipe 23 inside, and the ring seat 21 has several air inlets 211 that communicate with the air distribution channel 213; the ring seat 21 also has an exhaust port 212, the lower end of the exhaust port 212 is connected to an exhaust pipe 24, and the exhaust pipe 24 is equipped with a second nitrogen circulation control valve 241;

[0034] The heater 3 and the circulating fan 4 are installed between the first nitrogen circulation control valve 232 and the nitrogen inlet valve 231 for heating nitrogen during tire vulcanization. One end of the exhaust pipe 24 is connected to the air inlet of the circulating fan 4. The cooling medium inlet pipe 5 is installed between the first nitrogen circulation control valve 232 and the air inlet 211. One end is connected to the cooling medium storage tank (not shown in the figure), and the other end is connected to the air inlet pipe 23. The cooling medium inlet pipe 5 is equipped with a cooling inlet control valve 51. The cooling medium outlet pipe 6 is installed between the second nitrogen circulation control valve 241 and the exhaust port 212. One end is connected to the cooling medium storage tank, and the other end is connected to the exhaust pipe 24. The cooling medium outlet pipe 6 is connected with a cooling return control valve 61. The nitrogen return pipe 64 is connected in parallel with the cooling medium outlet pipe 6 on one side of the exhaust pipe 24. One end is connected to the nitrogen storage tank, and the nitrogen return pipe 64 is equipped with a nitrogen return valve 65.

[0035] During tire vulcanization, the nitrogen inlet valve 231, the first nitrogen circulation control valve 232, and the second nitrogen circulation control valve 241 are opened, while other valves are closed. This allows the heated nitrogen to enter the vulcanizing capsule 8 through the inlet pipe 23 and the inlet hole 211 of the ring seat 21, and then return to the circulating fan 4 through the exhaust hole 212 and the exhaust pipe 24 for circulation, thus vulcanizing the tire in sequence. After vulcanization is completed, the heater 3 and the circulating fan 4 stop working, the nitrogen return valve 65 is opened, and other valves are closed to recover the nitrogen. After the nitrogen is recovered, there is no or only a small amount of high-temperature nitrogen inside the vulcanizing capsule 8, which reduces the cooling time of the cooling medium, reduces energy consumption, and improves cooling efficiency.

[0036] When the tire is cooled after vulcanization, the cooling inlet control valve 51 and the cooling return control valve 61 are opened, and other valves are closed. The cooling medium is introduced into the vulcanizing capsule 8 for cooling. The cooling medium flows out from the cooling medium outlet pipe 6 and is recovered and reused. After the cooling medium is recovered, when the vulcanization operation is carried out again, only the nitrogen in the air inlet pipe 23, the vulcanizing capsule 8 and the exhaust pipe 24 needs to be circulated and heated, without heating the cooling medium. This reduces energy consumption and production costs and improves the efficiency of the entire vulcanization and cooling process.

[0037] like Figure 1As shown, a vacuum pipe 62 is provided on one side of the exhaust pipe 24, which is connected in parallel with the cooling medium outlet pipe 6 and the nitrogen return pipe 64. A vacuum valve 63 is provided on the vacuum pipe 62. After the vulcanizing capsule 8 is cooled, the vacuum valve 63 is opened and other valves are closed to extract the cooling medium inside the vulcanizing capsule 8. After the cooling medium is extracted, the vulcanizing capsule 8 changes from an inflated state to a deflated state, making it easier to remove the tire. In addition, after vacuuming, the cooling medium is prevented from remaining inside the vulcanizing capsule 8, further reducing the energy consumption and time during subsequent tire vulcanization operations.

[0038] Preferably, the cooling medium is a coolant (e.g., water) or a cooling gas.

[0039] As a further preferred embodiment of this technical solution, when the cooling medium is a cooling gas, nitrogen is used as the cooling medium, which improves the cooling efficiency while ensuring the effect of tire vulcanization.

[0040] like Figure 1 , Figure 2 As shown, multiple air inlets 211 are evenly arranged on the side wall of the ring seat 21, and the openings of the air inlets 211 face the oblique downward of the ring seat 21, ensuring that high-temperature nitrogen or cooling medium can enter the vulcanizing capsule 8 evenly and fully, ensuring the uniformity and consistency of the vulcanization process, and improving the cooling efficiency of the vulcanizing capsule 8.

[0041] like Figure 1 As shown, the vent 212 is flush with or lower than the top of the ring seat 21, which facilitates the rapid discharge of high-temperature nitrogen or cooling medium inside the vulcanizing capsule 8, avoiding uneven temperature or medium residue caused by accumulation.

[0042] like Figure 1 As shown, a circulation pipe 7 connects the intake pipe 23 and the exhaust pipe 24. A third nitrogen circulation control valve 71 is provided on the circulation pipe 7. One end of the circulation pipe 7 is located between the heater 3 and the first nitrogen circulation control valve 232, and the other end of the circulation pipe 7 is located between the circulation fan 4 and the second nitrogen circulation control valve 241. Before tire vulcanization, the nitrogen intake valve 231 and the third nitrogen circulation control valve 71 are opened first, and other valves are closed. Then, the heater 3 and the circulation fan 4 are started to preheat the nitrogen, which improves the formal heating efficiency. In addition, nitrogen preheating and vulcanizing capsule 8 cooling can be carried out simultaneously. After the vulcanizing capsule 8 cools down, the vulcanization operation of the next tire can be carried out directly, which shortens the capsule heating time and improves the vulcanization efficiency.

[0043] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. An electrically heated vulcanizing apparatus, comprising: A vulcanizing mold (1) is provided inside the vulcanizing cavity for placing the tire and the vulcanizing capsule (8); The central mechanism (2) includes a central rod (22) and an annular seat (21) disposed on the central rod (22). The annular seat (21) is provided with a clamping device (214) for clamping the vulcanized capsule (8). The annular seat (21) is connected to an air inlet pipe (23). The air inlet pipe (23) is provided with a nitrogen inlet valve (231) and a first nitrogen circulation control valve (232). The annular seat (21) is provided with an air distribution channel (213) communicating with the air inlet pipe (23). The annular seat (21) is provided with several air inlets (211) communicating with the air distribution channel (213). The annular seat (21) is also provided with an exhaust hole (212). The lower end of the exhaust hole (212) is connected to an exhaust pipe (24). The exhaust pipe (24) is provided with a second nitrogen circulation control valve (241). The heater (3) and the circulating fan (4) are installed between the first nitrogen circulation control valve (232) and the nitrogen inlet valve (231) for heating nitrogen during tire vulcanization operations. One end of the exhaust pipe (24) is connected to the air inlet of the circulating fan (4). Its characteristic is that it further includes: The cooling medium inlet pipe (5) is installed between the first nitrogen circulation control valve (232) and the air inlet (211). One end is connected to the cooling medium storage tank, and the other end is connected to the air inlet pipe (23). The cooling medium inlet pipe (5) is equipped with a cooling inlet control valve (51). The cooling medium outlet pipe (6) is installed between the second nitrogen circulation control valve (241) and the exhaust port (212). One end is connected to the cooling medium storage tank, and the other end is connected to the exhaust pipe (24). A cooling return control valve (61) is connected to the cooling medium outlet pipe (6). It also includes a nitrogen return pipe (64), which is connected in parallel with the cooling medium outlet pipe (6) on one side of the exhaust pipe (24), with one end connected to the nitrogen storage tank, and a nitrogen return valve (65) is provided on the nitrogen return pipe (64).

2. The electrically heated vulcanizing apparatus according to claim 1, characterized in that, The exhaust pipe (24) is provided with a vacuum pipe (62) connected in parallel with the cooling medium outlet pipe (6) and the nitrogen return pipe (64) on one side. The vacuum pipe (62) is provided with a vacuum valve (63). After the vulcanizing capsule (8) is cooled, the vacuum valve (63) is opened and other valves are closed to extract the cooling medium inside the vulcanizing capsule (8).

3. The electrically heated vulcanizing apparatus according to claim 1, characterized in that, The cooling medium is either a coolant or a cooling gas.

4. The electrically heated vulcanizing apparatus according to claim 3, characterized in that, When a cooling gas is used as the cooling medium, nitrogen is used.

5. The electrically heated vulcanizing apparatus according to claim 1, characterized in that, Multiple air inlets (211) are evenly arranged on the side wall of the ring seat (21), and the openings of the air inlets (211) face the oblique downward of the ring seat (21).

6. The electrically heated vulcanizing apparatus according to claim 1, characterized in that, The vent (212) is flush with or lower than the top of the ring seat (21).

7. An electrically heated vulcanizing apparatus according to any one of claims 1-6, characterized in that, A circulation pipe (7) is connected between the air intake pipe (23) and the exhaust pipe (24). A third nitrogen circulation control valve (71) is provided on the circulation pipe (7). One end of the circulation pipe (7) is located between the heater (3) and the first nitrogen circulation control valve (232), and the other end of the circulation pipe (7) is located between the circulating fan (4) and the second nitrogen circulation control valve (241). Before the tire is vulcanized, the nitrogen intake valve (231) and the third nitrogen circulation control valve (71) are opened first, and other valves are closed. Then the heater (3) and the circulating fan (4) are started to preheat the nitrogen.

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