Hot plate heating structure for a tire curing press

Abstract

This invention relates to the field of tire vulcanizing machine technology, and in particular to a hot plate heating structure for a tire vulcanizing machine. The hot plate heating structure includes: a heating assembly comprising a hot plate and an electromagnetic heating coil; and a magnetic leakage prevention assembly comprising an electromagnetic coil frame plate, a high-permeability magnetic ferrite, and a ferrite heat insulation plate; the hot plate, the electromagnetic coil frame plate, and the ferrite heat insulation plate are stacked sequentially; the electromagnetic heating coil is sandwiched between the hot plate and the electromagnetic coil frame plate; and the high-permeability magnetic ferrite is sandwiched between the electromagnetic coil frame plate and the ferrite heat insulation plate. In this invention, the sequential stacking of the hot plate, electromagnetic heating coil, electromagnetic coil frame plate, high-permeability magnetic ferrite, and ferrite heat insulation plate allows for both electromagnetic induction heating of the hot plate using the electromagnetic heating coil and blocking magnetic leakage to the base using the high-permeability magnetic ferrite; and also prevents heat conduction from the hot plate to the base when the ferrite heat insulation plate is connected to the base, achieving dual magnetic and thermal isolation.

Description

Technical Field

[0001] This invention relates to the field of tire vulcanizing machine technology, and in particular to a hot plate heating structure for a tire vulcanizing machine. Background Technology

[0002] During the tire vulcanization process, the mold (especially the hot plate of the lower mold) needs to be heated evenly, stably and efficiently to the high temperature required for the vulcanization process (usually above 160°C) to ensure the full vulcanization of the tire tread compound.

[0003] Currently, there are three main common heating methods for hot plates in tire vulcanizing machines: 1. Drilling multiple blind holes or through holes inside the hot plate, inserting rod-shaped resistance heating tubes into the holes and filling the gaps with thermal grease, and directly heating the hot plate through the heating tubes; 2. Processing closed flow channels inside the hot plate to form a circulation loop, and then using pipelines to introduce saturated steam or superheated steam generated by an external boiler into the flow channels of the hot plate, heating the hot plate through steam; 3. Similar to steam heating, setting flow channels inside the hot plate, and setting heating devices and circulation pumps outside the hot plate, heating the thermal oil to a set temperature through the heating device, and using the circulation pump to drive the thermal oil to circulate between the hot plate and the heating device, heating the hot plate through convection heat transfer.

[0004] When hot plates use electric heating elements, the heat from the heating element diffuses outwards from the insertion point, easily creating a significant temperature gradient and resulting in poor temperature uniformity. Furthermore, the gap between the heating element and the hot plate's hole walls reduces heat transfer efficiency. Using steam for heating requires a complete boiler room, steam pipeline network, and condensate recovery system, making the system large, complex, and very costly. When using thermal oil for heating, the thermal oil ages and cokes under long-term high-temperature operation, requiring regular replacement. Moreover, thermal oil is flammable; leaks from pipes, valves, or hot plate seals can easily cause fires, posing significant safety and environmental pollution risks. Summary of the Invention

[0005] This invention aims to solve the technical problems existing in related technologies. To this end, this invention proposes a hot plate heating structure for a tire vulcanizing machine, which combines an electromagnetic heating mechanism with a liquid phase change heat transfer mechanism to achieve the directional transfer of magnetic field energy to the hot plate, thereby reducing energy loss and enabling the hot plate to heat up quickly and uniformly.

[0006] This invention provides a hot plate heating structure for a tire vulcanizing machine, comprising: The heating assembly includes a heating plate and an electromagnetic heating coil. The anti-magnetic leakage component is equipped with an electromagnetic coil frame plate, high-permeability magnetic ferrite, and ferrite heat insulation plate. The hot plate, the electromagnetic coil frame plate, and the ferrite heat insulation plate are stacked in sequence; The electromagnetic heating coil is sandwiched between the hot plate and the electromagnetic coil frame plate; The high-permeability magnetic ferrite is sandwiched between the electromagnetic coil frame plate and the ferrite heat insulation plate.

[0007] According to the present invention, a hot plate heating structure for a tire vulcanizing machine is provided, wherein the hot plate has a sealed cavity inside, the sealed cavity extends along the circumference of the hot plate and is evenly distributed, and the sealed cavity is filled with a liquid medium to ensure uniform temperature of the hot plate.

[0008] According to the present invention, a hot plate heating structure for a tire vulcanizing machine is provided, wherein the ratio of the volume of the sealed cavity to the outer surface volume of the hot plate is between 0.45 and 0.6.

[0009] According to the present invention, a hot plate heating structure for a tire vulcanizing machine is provided, wherein the ratio of the volume of the liquid medium in its liquid state to the volume of the sealed cavity is between 0.5 and 0.7.

[0010] According to the present invention, a hot plate heating structure for a tire vulcanizing machine is provided, wherein the hot plate is configured as an annular shape, and a plurality of circular support ribs with different diameters and whose central axes coincide with the central axis of the hot plate are provided in the sealed cavity, and the circular support ribs are divided into a plurality of arc segments along the circumference.

[0011] According to the present invention, a hot plate heating structure for a tire vulcanizing machine is provided, wherein the electromagnetic heating coil is wound around the central axis of the hot plate, from the inner peripheral edge of the hot plate to the outer peripheral edge of the hot plate, to form a coil structure that is in close contact with the hot plate.

[0012] According to the present invention, a hot plate heating structure for a tire vulcanizing machine is provided. The electromagnetic coil frame plate is provided with grooves for accommodating the electromagnetic heating coil, so that the electromagnetic coil frame plate is in close contact with the hot plate.

[0013] According to the present invention, a hot plate heating structure for a tire vulcanizing machine is provided, wherein a plurality of straight grooves are provided on the surface of the ferrite heat insulation plate, which are evenly distributed along the circumference, and the straight grooves extend radially from the outer peripheral edge of the ferrite heat insulation plate to the center of the ferrite heat insulation plate.

[0014] According to the present invention, a hot plate heating structure for a tire vulcanizing machine is provided, wherein the high-permeability magnetic ferrite is embedded in the straight groove.

[0015] According to the present invention, a hot plate heating structure for a tire vulcanizing machine is provided, wherein the hot plate is made of steel with good magnetic permeability.

[0016] The above-described one or more technical solutions of this invention have at least one of the following technical effects: In this invention, the hot plate heating structure consists of a hot plate, an electromagnetic heating coil, an electromagnetic coil frame plate, a high-permeability magnetic ferrite, and a ferrite heat insulation plate stacked sequentially. This allows for efficient electromagnetic induction heating of the hot plate using the electromagnetic heating coil, while the high-permeability magnetic ferrite blocks the leakage of magnetic field lines to the base of the tire vulcanizing machine, thus preventing magnetic field energy leakage. Furthermore, when the ferrite heat insulation plate is connected to the tire vulcanizing machine, it prevents the hot plate from conducting heat to the tire vulcanizing machine, achieving dual magnetic and thermal isolation.

[0017] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted by the present invention, and the advantages brought about by the technical features of these technical solutions as described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings, or will be learned through the practice of the present invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a hot plate heating structure for a tire vulcanizing machine provided in an embodiment of the present invention.

[0020] Figure 2 This is a partially enlarged schematic diagram of the hot plate heating structure provided in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram showing the distribution of circular support ribs in a closed cavity, as provided in an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the winding method of the electromagnetic heating coil on the hot plate provided in an embodiment of the present invention.

[0023] Figure 5 This is a top view of a ferrite heat insulation plate provided in an embodiment of the present invention.

[0024] Figure label: 100. Heating component; 110. Hot plate; 111. Sealed cavity; 112. Circular support rib; 120. Electromagnetic heating coil; 200. Anti-magnetic leakage component; 210. High-permeability magnetic ferrite; 220. Ferrite heat insulation plate; 221. Straight groove; 230. Electromagnetic coil frame plate; 300. Base. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0026] Currently, there are three main common heating methods for hot plates in tire vulcanizing machines: 1. Drilling multiple blind holes or through holes inside the hot plate, inserting rod-shaped resistance heating tubes into the holes and filling the gaps with thermal grease, and directly heating the hot plate through the heating tubes; 2. Processing closed flow channels inside the hot plate to form a circulation loop, and then using pipelines to introduce saturated steam or superheated steam generated by an external boiler into the flow channels of the hot plate, heating the hot plate through steam; 3. Similar to steam heating, setting flow channels inside the hot plate, and setting heating devices and circulation pumps outside the hot plate, heating the thermal oil to a set temperature through the heating device, and using the circulation pump to drive the thermal oil to circulate between the hot plate and the heating device, heating the hot plate through convection heat transfer.

[0027] When hot plates use electric heating elements, the heat from the heating element diffuses outwards from the insertion point, easily creating a significant temperature gradient and resulting in poor temperature uniformity. Furthermore, the gap between the heating element and the hot plate's hole walls reduces heat transfer efficiency. Using steam for heating requires a complete boiler room, steam pipeline network, and condensate recovery system, making the system large, complex, and very costly. When using thermal oil for heating, the thermal oil ages and cokes under long-term high-temperature operation, requiring regular replacement. Moreover, thermal oil is flammable; leaks from pipes, valves, or hot plate seals can easily cause fires, posing significant safety and environmental pollution risks.

[0028] To address the aforementioned problems, an embodiment of the present invention provides a hot plate heating structure for a tire vulcanizing machine.

[0029] like Figure 1 and Figure 2 As shown, the hot plate heating structure includes a heating component 100 and a magnetic leakage prevention component 200.

[0030] The heating assembly 100 includes a hot plate 110 and an electromagnetic heating coil 120. The anti-magnetic leakage assembly 200 includes an electromagnetic coil frame plate 230, a high-permeability magnetic ferrite 210, and a ferrite heat insulation plate 220. The hot plate 110, the electromagnetic coil frame plate 230, and the ferrite heat insulation plate 220 are stacked sequentially; the electromagnetic heating coil 120 is sandwiched between the hot plate 110 and the electromagnetic coil frame plate 230; the high-permeability magnetic ferrite 210 is sandwiched between the electromagnetic coil frame plate 230 and the ferrite heat insulation plate 220.

[0031] Specifically, the hot plate 110, the electromagnetic heating coil 120, the electromagnetic coil frame plate 230, the high-permeability magnetic ferrite 210, and the ferrite heat insulation plate 220 are sequentially stacked on the base 300 of the tire vulcanizing machine. The first surface of the hot plate 110 is in contact with the electromagnetic heating coil 120, and the second surface of the hot plate 110 is in contact with the vulcanizing mold in the tire vulcanizing machine for heating the vulcanizing mold.

[0032] Preferably, the ferrite heat insulation plate 220 is provided with a groove for embedding the high-permeability magnetic ferrite 210, so that the ferrite heat insulation plate 220 can fit with the hot plate 110 to withstand the pressure applied to the hot plate 110.

[0033] Specifically, such as Figure 5 As shown, the ferrite heat insulation plate 220 has a plurality of straight grooves 211 evenly distributed along the circumference on its surface. The straight grooves 211 extend radially from the outer peripheral edge of the ferrite heat insulation plate 220 toward the center of the ferrite heat insulation plate 220.

[0034] The high-permeability magnetic ferrite 210 has a permeability ≥2000μH / m, which can effectively confine and guide the high-frequency alternating magnetic field, so that the magnetic field energy generated by the electromagnetic heating coil 120 is mainly concentrated on the hot plate 110. Straight grooves 211 on the ferrite heat insulation plate 220 are uniformly distributed circumferentially. The straight grooves 211 are radial grooves, extending from the outer peripheral edge of the ferrite heat insulation plate 220 to the middle of the ferrite heat insulation plate 220. By embedding high-permeability magnetic ferrite 210 in the straight grooves 211, leakage of magnetic field lines to the base 300 of the tire vulcanizing machine can be blocked, preventing eddy current heating of the magnetic field lines of the electromagnetic heating coil 120 in the base 300, thus avoiding additional energy loss.

[0035] Furthermore, the interior of the hot plate 110 is provided with a sealed cavity 111. The sealed cavity 111 extends circumferentially along the hot plate 110 and is evenly distributed. The sealed cavity 111 is filled with a liquid medium to ensure that the temperature of the hot plate 110 is uniform.

[0036] like Figure 3 and Figure 4 As shown, the hot plate 110 is configured in an annular shape to fit the circular vulcanizing mold of the tire vulcanizing machine. The sealed cavity 111 extends circumferentially along the hot plate 110.

[0037] The liquid medium can be deionized water or a special phase change heat transfer medium.

[0038] When the hot plate 110 is electromagnetically heated, the liquid medium vaporizes to form steam. The steam carries a large amount of latent heat of vaporization and quickly diffuses to the lower temperature area in the hot plate 110, where it transfers heat. Then, the steam condenses and liquefies during the heat release process. The liquefied liquid medium flows back to the heating zone under gravity and capillary action, and then vaporizes again. Thus, the liquid medium continuously undergoes phase change heat transfer cycle in the sealed cavity 111.

[0039] This phase change heat transfer method has a much higher heat transfer efficiency than pure solid heat conduction. It can quickly eliminate the temperature difference between different areas of the hot plate 110, and control the temperature deviation of the working surface of the hot plate 110 within ±2℃. This meets the stringent requirements of the tire vulcanization process for temperature uniformity, ensures that the tire tread rubber is vulcanized fully and uniformly, improves the quality consistency of the finished tire, and solves the problem of uneven heating and cooling that is easy to occur when the hot plate adopts the traditional heating method.

[0040] In this embodiment, the hot plate heating structure consists of a hot plate 110, an electromagnetic heating coil 120, an electromagnetic coil frame plate 230, a high-permeability magnetic ferrite 210, and a ferrite heat insulation plate 220 stacked sequentially. By directly attaching the electromagnetic heating coil 120 to the first surface of the hot plate 110, the hot plate 110 can be directly heated through electromagnetic induction, thus improving heating efficiency. The high-permeability magnetic ferrite 210 blocks the leakage of magnetic field lines to the base 300 of the tire vulcanizing machine. At the same time, the ferrite heat insulation plate 220 prevents the heat from the hot plate 110 from being conducted to the base 300 of the tire vulcanizing machine, thereby achieving dual magnetic and thermal isolation.

[0041] Based on the above embodiments, another embodiment of the present invention introduces a hot plate heating structure for a tire vulcanizing machine.

[0042] To ensure the continuity and stability of phase change heat transfer, the ratio between the volume of the sealed cavity 111 and the outer surface volume of the hot plate is further limited.

[0043] The ratio of the volume of the sealed cavity 111 to the external volume of the hot plate 110 is between 0.45 and 0.6. Specifically, when the volume ratio of the sealed cavity 111 is between 45% and 60%, it can ensure the medium space required for phase change heat transfer, and also ensure that the hot plate 110 has sufficient pressure-bearing capacity to meet the structural requirements of long-term high-pressure operation of the vulcanizing machine, thus balancing heat transfer performance and structural stability.

[0044] When the volume ratio of the sealed cavity 111 is less than 45%, the total amount of liquid medium that can be contained in the sealed cavity 111 is low, which is difficult to meet the requirements for efficient heat transfer of the entire hot plate 110. When the volume ratio of the sealed cavity 111 is higher than 60%, the proportion of the solid metal part of the hot plate 110 is too small, and its structural strength and rigidity cannot withstand the huge pressure when the tire vulcanizing machine is closed (the closing force can usually reach hundreds of tons), which can easily lead to plastic deformation, cracking and other damage to the hot plate 110.

[0045] Furthermore, the ratio of the volume of the liquid medium in its liquid state to the volume of the sealed cavity 111 is between 0.5 and 0.7. Specifically, the liquid medium is filled in a non-full manner, with the liquid volume ratio controlled between 50% and 70%, leaving 30% to 50% of the gas phase space for the liquid medium.

[0046] This provides sufficient buffer space for the vaporization and expansion of the liquid medium, preventing problems such as bulging and cracking of the hot plate 110 due to the volume expansion of the liquid medium after heating and vaporization, and the sudden increase in internal pressure of the sealed cavity 111.

[0047] At the same time, this filling ratio ensures that the liquid medium fully covers the entire area of ​​the sealed cavity 111 in the initial stage of heating, ensuring rapid start of the phase change cycle, avoiding local heat transfer interruption due to drying, and ensuring stable phase change heat transfer cycle.

[0048] Based on the above embodiments, another embodiment of the present invention introduces a hot plate heating structure for a tire vulcanizing machine.

[0049] like Figure 3 As shown, in order to improve the strength of the hot plate 110, the structure of the sealed cavity 111 is further optimized.

[0050] The hot plate 110 is annular. Multiple circular support ribs 112 of different diameters are provided within the sealed cavity 111, with their central axes coinciding with the central axis of the hot plate 110. The circular support ribs 112 are divided into multiple arc segments along their circumference.

[0051] Specifically, the hot plate 110 is configured as an annular shape adapted to the tire vulcanizing mold. Inside the sealed cavity 111, multiple circular support ribs 112 are distributed concentrically according to their diameter. At the same time, the support ribs 112 are equally divided into multiple arc segments along the circumference, thereby allowing the liquid or gaseous liquid medium to circulate smoothly within the sealed cavity 111.

[0052] By setting circular support ribs 112 within the sealed cavity 111, the high-pressure load during mold closing can be distributed across the entire hot plate 110, preventing collapse of the sealed cavity 111 due to localized stress concentration and significantly improving the compressive and deformation resistance of the hot plate 110. Simultaneously, the arc-shaped split design provides both support and reinforcement without obstructing the circulation of the liquid medium, ensuring smooth circulation of the liquid medium throughout the sealed cavity 111, achieving the dual effects of structural reinforcement and smooth heat transfer.

[0053] Furthermore, the electromagnetic heating coil 120 is wound around the central axis of the hot plate 110, starting from the inner peripheral edge of the hot plate 110 and winding around it to the outer peripheral edge of the hot plate 110, to form a coil structure that is in close contact with the hot plate 110.

[0054] Specifically, the electromagnetic heating coil 120 is laid out in a spiral pattern with equal pitch from the inner circumference to the outer circumference, with the central axis of the hot plate 110 as the center. Furthermore, the electromagnetic heating coil 120 is completely in contact with the first surface of the hot plate 110. The electromagnetic heating coil 120 covers the entire surface of the hot plate 110 to maximize the heating area.

[0055] The electromagnetic heating coil 120 is densely wound to ensure that the high-frequency alternating magnetic field it generates is evenly distributed across the entire hot plate 110, preventing large temperature differences caused by localized magnetic field concentration on the hot plate 110. Simultaneously, the close-fitting installation of the single-layer coil structure reduces the air gap between the electromagnetic heating coil 120 and the hot plate 110, lowers magnetic resistance, and improves magnetic field coupling efficiency, enabling the hot plate 110 to more efficiently convert magnetic field energy into heat energy.

[0056] Preferably, the electromagnetic heating coil 120 is a high-temperature resistant copper core insulated coil with a pitch of 10mm and one winding layer. The gap between the electromagnetic heating coil 120 and the hot plate 110 is less than 0.5mm.

[0057] Based on the above embodiments, another embodiment of the present invention introduces a hot plate heating structure for a tire vulcanizing machine.

[0058] like Figure 1 and Figure 2 As shown, the electromagnetic coil frame plate 230 is disposed between the high-permeability magnetic ferrite 210 and the hot plate 110.

[0059] The electromagnetic coil frame plate 230 is made of high-temperature resistant, low-thermal-conductivity resin material to prevent heat from the heat plate 110 from being transferred to the high-permeability magnetic ferrite 210 and the ferrite heat insulation plate 220 below. In addition, the electromagnetic coil frame plate 230 is a non-magnetic material, which will not interfere with the magnetic field of the electromagnetic heating coil 120, ensuring that the magnetic field can be fully applied to the induction heating of the heat plate 110.

[0060] Preferably, the electromagnetic coil frame plate 230 is provided with a groove for accommodating the electromagnetic heating coil 120, so that the electromagnetic coil frame plate 230 and the hot plate 110 can fit tightly together.

[0061] Specifically, a groove matching the winding shape of the electromagnetic heating coil 120 is formed on the electromagnetic coil frame plate 230. The electromagnetic heating coil 120 is embedded in the groove, so that the upper surface of the coil is flush with the upper surface of the electromagnetic coil frame plate 230, ensuring that the first plate surface of the hot plate 110 is in close contact with the electromagnetic coil frame plate 230, and eliminating the gap between the hot plate 110 and the electromagnetic coil frame plate 230.

[0062] This ensures close coupling between the electromagnetic heating coil 120 and the hot plate 110, and also allows the load of the hot plate 110 to be evenly transferred to the structure below through the electromagnetic coil frame plate 230, thus preventing the electromagnetic heating coil 120 from being damaged by compression during mold closing.

[0063] Furthermore, the hot plate 110 is made of steel with good magnetic conductivity.

[0064] For example, the hot plate 110 is made of 45# steel or Q235B steel. These types of steel are ferromagnetic materials with excellent magnetic permeability and high relative permeability. They can effectively cut the high-frequency alternating magnetic field generated by the electromagnetic heating coil 120, producing a strong eddy current effect internally, thus achieving efficient electromagnetic induction heating. At the same time, 45# steel and Q235B steel possess good mechanical and machinability properties, capable of withstanding the high-pressure clamping force and high-temperature working environment of the tire vulcanizing machine while reducing machining difficulty.

[0065] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "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 the embodiments of the present invention and simplifying the description, 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 the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0066] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0067] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms are not limited to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hot plate heating structure for a tire vulcanizing machine, characterized in that, include: The heating assembly (100) is provided with a hot plate (110) and an electromagnetic heating coil (120). The anti-magnetic leakage component (200) is provided with an electromagnetic coil frame plate (230), a high-permeability magnetic ferrite (210) and a ferrite heat insulation plate (220). The hot plate (110), the electromagnetic coil frame plate (230), and the ferrite heat insulation plate (220) are stacked in sequence; The electromagnetic heating coil (120) is sandwiched between the hot plate (110) and the electromagnetic coil frame plate (230); the high-permeability magnetic ferrite (210) is sandwiched between the electromagnetic coil frame plate (230) and the ferrite heat insulation plate (220).

2. The hot plate heating structure for a tire vulcanizing machine according to claim 1, characterized in that, The hot plate (110) has a sealed cavity (111) inside. The sealed cavity (111) extends along the circumference of the hot plate (110) and is evenly distributed. The sealed cavity (111) is filled with a liquid medium to ensure that the temperature of the hot plate (110) is uniform.

3. The hot plate heating structure for a tire vulcanizing machine according to claim 2, characterized in that, The ratio of the volume of the sealed cavity (111) to the external volume of the hot plate (110) is between 0.45 and 0.

6.

4. The hot plate heating structure for a tire vulcanizing machine according to claim 3, characterized in that, The ratio of the volume of the liquid medium in its liquid state to the volume of the sealed cavity (111) is between 0.5 and 0.

7.

5. The hot plate heating structure for a tire vulcanizing machine according to any one of claims 2 to 4, characterized in that, The hot plate (110) is configured as an annular shape, and the sealed cavity (111) is provided with a plurality of circular support ribs (112) of different diameters and whose central axis coincides with the central axis of the hot plate (110). The circular support ribs (112) are divided into a plurality of arc segments along the circumference.

6. The hot plate heating structure for a tire vulcanizing machine according to claim 5, characterized in that, The electromagnetic heating coil (120) is wound around the central axis of the hot plate (110) from the inner peripheral edge of the hot plate (110) to the outer peripheral edge of the hot plate (110) to form a coil structure that is in close contact with the hot plate (110).

7. The hot plate heating structure for a tire vulcanizing machine according to claim 6, characterized in that, The electromagnetic coil frame plate (230) is provided with a groove for accommodating the electromagnetic heating coil (120) so that the electromagnetic coil frame plate (230) and the hot plate (110) fit tightly together.

8. The hot plate heating structure for a tire vulcanizing machine according to claim 7, characterized in that, The ferrite heat insulation plate (220) has a plurality of straight grooves (211) evenly distributed along the circumference on its surface. The straight grooves (211) extend radially from the outer peripheral edge of the ferrite heat insulation plate (220) toward the center of the ferrite heat insulation plate (220).

9. The hot plate heating structure for a tire vulcanizing machine according to claim 8, characterized in that, The high-permeability magnetic ferrite (210) is embedded in the straight groove (211).

10. The hot plate heating structure for a tire vulcanizing machine according to any one of claims 1 to 4, characterized in that, The hot plate (110) is made of steel with good magnetic conductivity.

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