Tire vulcanization device and heating method for a tire vulcanization device

Abstract

The present application relates to a kind of tire vulcanization device and the heating method of tire vulcanization device, the tire vulcanization device includes: mold body, mold body includes upper portion, lower portion and circumferential portion, these parts form mold cavity;And electric heating device, electric heating device includes upper heating device, lower heating device and circumferential heating device, wherein, at least one of these heating devices can be set to composite electric heating device, and wherein, composite electric heating device includes resistive heating element and inductive heating element.This kind of tire vulcanization device can make mold quickly reach set temperature, reduce the working time of resistive heating element (such as resistance wire), greatly improve the service life of resistive heating element, ensure the use effect of product, realize more fine temperature regulation and temperature maintenance, reduce energy consumption.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tire vulcanization, and relates to a tire vulcanization device, in particular to a composite heating tire vulcanization device. In addition, the present application also relates to a heating method of the tire vulcanization device. BACKGROUND

[0002] In industrial production, vulcanization is usually used to improve the overall hardness of certain materials. Taking tire vulcanization as an example, tire vulcanization refers to the vulcanization of the outer tire by using a mold to pressurize. Before tire vulcanization, the plastic rubber is viscoelastic and has low strength and low use value. Through vulcanization, the plastic rubber is solidified into high-elasticity rubber with high use value.

[0003] The current heating method of the tire mold is generally steam heating. Since tire vulcanization requires a high-temperature and high-pressure environment, the traditional steam heating method has complex pipelines and a large amount of heat loss during transportation, and is accompanied by a large amount of waste heat, resulting in low energy utilization rate.

[0004] The current industry is gradually developing towards electric heating. However, the existing electric heating vulcanization machine, hot plate and mold still have some problems. For example, for the tire mold using resistance heating, the service life of the resistance heating element is short due to frequent high-power heating operation, and the heat utilization rate is low. For the tire mold using inductive heating, the mold heating speed is usually too fast and the temperature is usually over-adjusted. These electric heating molds cannot meet the actual needs of tire vulcanization in temperature regulation or control.

[0005] Therefore, it is urgent to provide an improved tire vulcanization device that can overcome one or more shortcomings in the prior art. SUMMARY

[0006] In view of the above problems existing in the prior art, the purpose of the present application is to provide a tire vulcanization device, in particular an electric heating tire vulcanization device, which can comprehensively utilize the advantages of resistance heating and inductive heating to better meet the actual needs of tire vulcanization.

[0007] According to one aspect of the present application, a tire vulcanization device is provided, which comprises:

[0008] a mold body, the mold body comprising an upper portion, a lower portion and a circumferential portion arranged between the upper portion and the lower portion, the upper portion, the lower portion and the circumferential portion defining a mold cavity; and

[0009] The electric heating device comprises an upper heating device for heating an upper portion, a lower heating device for heating a lower portion, and a circumferential heating device for heating a circumferential portion,

[0010] At least one of the upper heating device, the lower heating device and the circumferential heating device is arranged as a composite electric heating device, and the composite electric heating device comprises a resistive heating element and an inductive heating element, and the resistive heating element and the inductive heating element are arranged in a groove of the same component of the tire vulcanizing device.

[0011] The tire vulcanizing device can use the resistive heating element and the inductive heating element separately or simultaneously according to needs, can utilize the characteristics of high inductive heating efficiency and fast temperature rise to make the mold reach the set temperature quickly, reduce the working time of the resistive heating element (such as a resistive wire), greatly improve the service life of the resistive heating element, and ensure the use effect of the product. In addition, the resistive heating element can be used according to needs to realize more precise temperature adjustment and temperature maintenance, and reduce energy consumption. The same component can be a component with heat conduction and electrical conductivity, such as a ferromagnetic component. In this way, the inductive heating directly causes the component to generate heat by induction, without the need for heat conduction between the hot plates, and the structure is simpler, the heat transfer efficiency is higher, and energy consumption is more favorable. In addition, compared with the simple stacking of the two heating modes of the hot plates, the hot plate according to the present application has moderate thickness, and does not need to be provided with additional connecting holes, avoiding the uneven arrangement of the heating elements due to avoiding the connecting holes; at the same time, the stacking arrangement, when only the resistive heating element works, a large amount of heat is dissipated from the inductive heating layer, and the two heating components are arranged in the same component, and a heat preservation layer can be arranged outside the component, effectively preventing the heat from spreading outward, and greatly improving the energy utilization efficiency.

[0012] According to the above aspect of the present application, preferably, the resistive heating element is arranged closer to the mold cavity than the inductive heating element. In this way, the heat transfer distance of the resistive heating element is less, and the transfer efficiency is higher, while the inductive heating (or induction heating) itself allows a certain distance to exist, which is less affected.

[0013] According to the above aspect of the present application, preferably, the resistive heating element and the inductive heating element are arranged at the same distance from the mold cavity of the mold body, and the resistive heating element and the inductive heating element are arranged alternately. In this way, when the resistive heating element and the inductive heating element work at the same time, the adjacent inductive heating elements can pass through the reverse current, and the electromotive force generated by the inductive heating elements cancels each other out, and the influence on the resistive circuit is weakened.

[0014] According to the above aspect of the present application, preferably, the tire vulcanizing device further comprises a magnetic conductive element arranged on the side of the inductive heating element opposite to the mold body. The magnetic conductive element can be used to improve the efficiency of inductive heating and effectively control the overflow of magnetic field, ensuring the safety of the equipment and personnel.

[0015] According to the above aspect of the present application, preferably, the tire vulcanizing device further comprises a heat insulation element arranged on the side of the electric heating device opposite to the mold cavity of the mold body. The heat insulation element can be used to reduce or avoid the heat diffusion generated by the heating parts, reduce energy waste, and reduce the temperature of the tire mold, especially the temperature of the outer side thereof.

[0016] According to the above aspect of the present application, preferably, the upper heating device or the lower heating device is provided as a composite electric heating device, and the composite electric heating device further comprises a plate body made of a thermally and electrically conductive material, wherein a first side of the plate body is arranged in contact with the mold body, and a second side of the plate body is provided with a groove.

[0017] According to the above aspect of the present application, preferably, in order to achieve better heating and heat conduction effects, the circumferential heating device is provided as a composite electric heating device, and the circumferential portion is provided with a groove, and the groove is a circumferential groove.

[0018] According to the above aspect of the present application, preferably, the tire vulcanizing device further comprises a temperature measuring element arranged in the area of the electric heating device close to the mold body. The temperature measuring element can be used to collect temperature signals and transmit the temperature signals to the temperature collection module in the temperature control system, which is analyzed and processed by the temperature control system, and according to the set temperature and temperature control logic, the inductive heating and resistance heating are automatically switched to achieve the best energy saving effect.

[0019] As a preferred embodiment, in order to more accurately monitor the temperature of the tire mold, the temperature measuring elements are arranged in the upper heating device and the lower heating device and are arranged in the same plane close to the mold body; or the temperature measuring elements are arranged in the circumferential portion and are distributed in the same annular surface of the circumferential portion. In this way, the temperature measuring elements are arranged in the surface extending in the circumferential direction along the circumferential portion, rather than along the conical surface of the circumferential portion (such as the guide ring). Through this arrangement, the influence on temperature measurement caused by the distance difference can be prevented.

[0020] According to the above aspect of the present application, preferably, the temperature measuring element is arranged close to the inductive heating element and away from the resistive heating element. This arrangement can avoid the measured temperature value being greatly affected by the heating unit. Generally, electromagnetic heating is used when the temperature difference between the mold temperature and the preset temperature is large. Compared with the large temperature difference at this time, the temperature error measured by the temperature measuring element is less affected by the heating element, and the influence on temperature control is also small. Resistive heating is generally used in scenarios such as heat preservation, when the temperature difference between the mold temperature and the preset temperature is small. Compared with the small temperature difference at this time, the temperature measuring element is greatly affected by the heating element, and the influence on temperature control is also large.

[0021] According to the above aspect of the present application, the tire body of the tire vulcanization device is a segmented tire mold or a two-half tire mold, and is positioned outside the vulcanization bladder to jointly define a vulcanization chamber with the vulcanization bladder.

[0022] According to another aspect of the present application, a heating method of a tire vulcanization device is provided, the heating method comprising the following steps:

[0023] providing a tire vulcanization device according to the above aspect;

[0024] when the temperature of the mold body is lower than a first threshold temperature, energizing the inductive heating element to warm up the mold body to the first threshold temperature via inductive heating;

[0025] when the temperature of the mold body is equal to or higher than the first threshold temperature, de-energizing the inductive heating element and energizing the resistive heating element to adjust the temperature of the mold body via resistive heating.

[0026] According to the above aspect of the present application, preferably, when the temperature of the mold body is lower than a second threshold temperature, wherein the second threshold temperature is lower than the first threshold temperature, the resistive heating element and the inductive heating element are simultaneously energized to warm up the mold body to the second threshold temperature via inductive heating and resistive heating.

[0027] According to the tire vulcanization device of the present application, a composite heating mode including inductive heating and resistive heating is used, wherein the power of inductive heating is greater than the power of resistive heating. By taking advantage of the characteristics of fast speed and high efficiency of inductive heating, the system automatically switches to inductive heating in the early preheating of the mold and in scenarios with high demand for heat, thereby improving the working efficiency. When the mold reaches the required temperature or is within the set temperature range, the system automatically switches to resistive heating for heat preservation.

[0028] This tire vulcanization device can effectively utilize inductive heating while reducing the working time of resistive wires, greatly improving the service life of resistive wires, and ensuring the use effect of products.

[0029] Thus, the tire vulcanization device according to the present application is able to meet the use requirements, overcome the drawbacks of the prior art and achieve the predetermined purposes. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to further clearly describe the tire vulcanization device according to the present application, the present application will be described in detail below in combination with the drawings and specific embodiments, in which:

[0031] Figure 1 is a schematic cross-sectional view of a tire vulcanization device according to a non-limiting embodiment of the present application;

[0032] Figure 2 is Figure 1 is a schematic top view of the tire vulcanization device shown in

[0033] The above drawings are merely schematic and not strictly drawn to scale.

[0034] The reference numerals in the drawings are listed in the list of drawings and embodiments:

[0035] 100 - tire vulcanization device;

[0036] 10 - mold body;

[0037] 11 - upper portion;

[0038] 12 - lower portion;

[0039] 13 - circumferential portion;

[0040] 14 - mold cavity;

[0041] 20 - electric heating device;

[0042] 21 - upper heating device;

[0043] 22 - lower heating device;

[0044] 23 - circumferential heating device;

[0045] 30 - combined electric heating device;

[0046] 31 - resistive heating element;

[0047] 32 - inductive heating element;

[0048] 33 - plate body;

[0049] 40 - magnetic conduction element;

[0050] 50 - thermal insulation element;

[0051] 60 - temperature measuring element. DETAILED DESCRIPTION

[0052] It should be understood that the application can employ various alternative orientations and step sequences, except where expressly specified to the contrary. It is also to be understood that the specific devices illustrated in the attached drawings, and described in the following specification, are simply exemplary embodiments of the inventive concepts defined herein. Hence, specific dimensions, directions or other physical characteristics relating to the embodiments disclosed are not to be considered as limiting, unless expressly stated otherwise.

[0053] Figure 1 is a schematic cross-sectional view of a tire vulcanization apparatus 100 according to a non-limiting embodiment of the present application.

[0054] As shown and by way of non-limiting example, a tire vulcanization apparatus 100 according to the present application can mainly comprise a mold body 10 and an electric heating apparatus 20, thereby being an electrically heated tire vulcanization apparatus. The mold body 10 of the tire vulcanization apparatus 100 can be a segmented tire mold or a two- half tire mold, have openable and closable arrangements, and can cooperate with a vulcanization bladder, not shown in the drawings, e.g. be positioned outside the vulcanization bladder, to jointly define a vulcanization chamber with the vulcanization bladder. The mold body 10 and the vulcanization bladder can clamp an unvulcanized green tire therebetween, and by heating the mold body 10 and the vulcanization bladder, supply the heat required for vulcanization of the green tire, and by pressurizing the vulcanization bladder, provide the pressure required for vulcanization of the green tire together with the mold body 10.

[0055] In Figure 1 In the illustrated embodiment, the mold body 10 can comprise an upper portion 11, a lower portion 12, and a circumferential portion 13 disposed between the upper portion 11 and the lower portion 12. The upper portion 11 can be an upper cover, the lower portion 12 can be a base, and the circumferential portion 13 can be a sleeve.

[0056] The upper portion 11, the lower portion 12, and the circumferential portion 13 can enclose a mold cavity 14 therebetween, which can be used to house a tire and a vulcanization bladder. In addition, the mold body 10 can further comprise pattern blocks (or sectors) and the like components, which are known in the art and thus the present application will not be described in detail.

[0057] With continued reference to Figure 1 The electric heating apparatus 20 is disposed on the mold body 10 for heating the mold body 10 with electrical energy. In Figure 1 In the illustrated embodiment, the electric heating apparatus 20 can comprise an upper heating apparatus 21, a lower heating apparatus 22, and a circumferential heating apparatus 23. The upper heating apparatus 21 can be disposed on the upper portion 11 for heating the upper portion 11, the lower heating apparatus 22 can be disposed on the lower portion 12 for heating the lower portion 12, and the circumferential heating apparatus 23 can be disposed on the circumferential portion 13 for heating the circumferential portion 13, for example.

[0058] The electric heating device 20 can be a composite electric heating device 30, i.e. a heating device that heats the mold body 10 by at least two electric heating methods. As an example, the composite electric heating device 30 can comprise a resistive heating element 31 and an inductive heating element 32.

[0059] In the embodiment shown in the figures, the upper heating device 21 and the lower heating device 22 can be upper and lower hot plates of the tire vulcanization device 100, respectively, and can be provided as composite electric heating devices 30. In this case, the composite electric heating device 30 can further comprise a plate body 33, which can be the plate body of the upper hot plate or the plate body of the lower hot plate, for example. The plate body 33 can correspond to the shape of the upper portion 11 and the lower portion 12 of the mold body 10 and can be made of a thermally and electrically conductive material. As shown in the figures, the front side of the plate body 33, i.e. the side facing the mold cavity 14, is arranged in contact with the mold body 10, while the back side of the plate body 33, i.e. the side facing away from the mold cavity 14, is provided with recesses in which the resistive heating element 31 and the inductive heating element 32 can be arranged. Figure 1

[0060] However, the present application is not limited thereto, but at least one of the upper heating device 21, the lower heating device 22 and the circumferential heating device 23 can be provided as a composite electric heating device 30.

[0061] The resistive heating element 31 and the inductive heating element 32 are provided within the same component or part of the tire vulcanization device 100, which can be a thermally and electrically conductive component, for example. As an example, the resistive heating element 31 can heat by passing an electric current through a conductor with a large electrical resistance, and the temperature of the component is increased by heat conduction, while the inductive heating element 32 induces eddy currents in the component by alternating current, which in turn heats the component.

[0062] Compared to the simple superposition of a resistive heating plate and an electromagnetic heating plate, and the heat transfer between the hot plates mainly by heat conduction, the resistive heating element 31 and the inductive heating element 32 are provided within the same thermally and electrically conductive part, which allows the inductive heating to directly induce heat in the component without the need for heat conduction between the hot plates, and the structure is simpler, the heat transfer efficiency is higher, and it is more conducive to energy saving.

[0063] In the embodiment shown in the figures, the upper heating device 21 and the lower heating device 22 can be upper and lower hot plates of the tire vulcanization device 100, respectively, and can be provided as composite electric heating devices 30. In this case, the composite electric heating device 30 can further comprise a plate body 33, which can be the plate body of the upper hot plate or the plate body of the lower hot plate, for example. The plate body 33 can correspond to the shape of the upper portion 11 and the lower portion 12 of the mold body 10 and can be made of a thermally and electrically conductive material. As shown in the figures, the front side of the plate body 33, i.e. the side facing the mold cavity 14, is arranged in contact with the mold body 10, while the back side of the plate body 33, i.e. the side facing away from the mold cavity 14, is provided with recesses in which the resistive heating element 31 and the inductive heating element 32 can be arranged. Figure 1

[0064] As shown, the front side of the plate body 33, i.e. the side facing the mold cavity 14, is arranged in contact with the mold body 10, while the back side of the plate body 33, i.e. the side facing away from the mold cavity 14, is provided with recesses in which the resistive heating element 31 and the inductive heating element 32 can be arranged. ​​

[0065] Figure 2 is Figure 1 a top view schematic diagram of the tire vulcanization device 100 shown in

[0066] As Figure 2 As can be more clearly seen in the above-mentioned figures, on the back of the upper heating device (e.g. upper hot plate) 21 and the lower heating device (e.g. lower hot plate) 22, both resistive heating elements 31 and inductive heating elements 32 can be installed. As a non-limiting example, the resistive heating elements 31 can be resistive wires, while the inductive heating elements 32 can be inductive coils or induction coils.

[0067] The induction coils can be arranged circumferentially or in blocks on the back of the hot plate to allow them to make the heat generated by the hot plate as uniform as possible. The resistive wires can also be distributed circumferentially (or in a circle), for example, the resistive wires can be arranged circumferentially in a number of 2, 3, 4, etc. on the hot plate, and can be arranged at relatively uniform positions, for example, distributed between the induction coils, for providing the heat required for heating or heat preservation of the hot plate. At the same time, the resistive wires can be installed on the surface of the hot plate in a mosaic manner to maximize the contact area of the resistive wires with the heated parts and improve their heat transfer efficiency to achieve energy saving effects.

[0068] Referring back to Figure 1 As shown, the circumferential heating device 23 can also be provided as a composite electric heating device 30. In this embodiment, the circumferential portion 13 is provided with a circumferential groove, and the resistive heating elements 31 and the inductive heating elements 32 are arranged in the circumferential groove.

[0069] Likewise, the inductive heating elements 32 such as induction coils can be arranged circumferentially or in blocks on the outer periphery of the circumferential portion 13 of the mold body 10, for example, arranged across the entire circumferential surface of the circumferential portion 13 from top to bottom, to allow them to make the heat generated by the circumferential portion 13 of the mold as uniform as possible. The resistive wires can likewise be arranged circumferentially around the circumferential portion 13, and can be arranged in a number of 2, 3, 4, etc. (as shown) at relatively uniform positions of the circumferential portion 13 of the mold, distributed between the induction coils, for providing the heat required for heat preservation of the mold jacket. At the same time, the resistive wires can be installed on the surface of the circumferential portion 13 of the mold in a mosaic scheme to maximize the contact area of the resistive wires with the heated parts and improve their heat transfer efficiency to achieve energy saving effects.

[0070] As shown in Figure 1 As shown in the above-mentioned figures, the distance of the resistive heating elements 31 and the inductive heating elements 32 from the mold body 10 can be the same. At this time, the resistive heating elements 31 and the inductive heating elements 32 can be arranged alternately in sequence at this same distance, for example, the resistive heating elements 31 are sandwiched between the inductive heating elements 32 in the figures.

[0071] In alternative embodiments, the distance of the resistive heating element 31 and of the inductive heating element 32 from the mould body 10 can be different. For example, the resistive heating element 31 can be arranged closer to the mould cavity 14 of the mould body 10 than the inductive heating element 32. In this way, the thermal transfer distance of the resistive heating element is less, with a higher transfer efficiency, while the inductive heating itself allows for the presence of a certain distance, with a less affected efficiency.

[0072] The tyre vulcanisation device 100 can also comprise a magnetically permeable element 40 arranged on the side of the inductive heating element 32 opposite the mould body 10, i.e. on the side facing away from the mould body 10.

[0073] In addition, as a non-limiting example, the tyre vulcanisation device 100 can also comprise a thermal insulation element 50 arranged on the side of the electric heating device 20 opposite the mould cavity 14 of the mould body 10. For example, in the embodiments comprising the magnetically permeable element 40, the thermal insulation element 50 can be provided on the side of the magnetically permeable element 40 facing away from the mould body 10.

[0074] For the upper heating device (upper hot plate) 21 and for the lower heating device (lower hot plate) 2, the thermal insulation element 50 can be shaped in the form of a thermal insulation plate and its circumferential edge can correspond to the circumferential edge of the upper heating device (upper hot plate) 21 and of the lower heating device (lower hot plate) 2. For the circumferential portion 13 of the mould body 10, the thermal insulation element 50 can be shaped in the form of a thermal insulation sleeve to enclose the circumferential portion 13 therein, thus having a better thermal insulation, heat retention effect.

[0075] The tyre vulcanisation device also comprises a temperature measuring element 60 which can be provided in the area of the electric heating device 20 close to the mould body 10. The temperature measuring element 60 can comprise various elements for measuring the temperature or temperature sensors known in the art, such as temperature measuring resistors or thermocouples. In the illustrated embodiment, the temperature measuring element 60 can comprise a plurality of temperature measuring elements 60 and can be arranged on the same face, i.e. at substantially the same position from the mould cavity 14 of the mould body 10. As used herein, the term "substantially" is interpreted to mean ± 5% of the range, unless otherwise specified. Figure 1 In the illustrated embodiment, the temperature measuring element 60 can comprise a plurality of temperature measuring elements 60 and can be arranged on the same face, i.e. at substantially the same position from the mould cavity 14 of the mould body 10. As used herein, the term "substantially" is interpreted to mean ± 5% of the range, unless otherwise specified.

[0076] The temperature measuring elements 60 of the upper heating device (upper hot plate) 21 and the lower heating device (lower hot plate) 2 can be arranged near the contact surface of the hot plate and the mold body 10. The temperature measuring elements 60 on the circumferential portion (mold sleeve) 13 can be arranged near the outer circumference. Arranging the temperature measuring elements 60 near the outer circumference is convenient for installation, and because the inside of the mold sleeve is a slope, if arranged along the slope, the temperature measurement is greatly affected by the distance, which can cause a large deviation. In contrast, for the upper heating device 21 and the lower heating device 22 such as the upper and lower hot plates, the distance for arranging the temperature measuring elements is large, and the relative position relationship between the temperature measuring elements and the resistance elements can not be considered.

[0077] For the temperature measuring elements 60 arranged on the mold sleeve (for example, the circumferential portion 13), because their positions are relatively close to the heating elements, the measured temperature values can be greatly affected by the heating units, so the temperature measuring elements are arranged to avoid the resistance heating elements 31, especially in embodiments in which the resistance heating elements 31 and the inductive heating elements 32 are different in distance from the mold body 10. At this time, preferably, the temperature measuring elements 60 are arranged to be close to the inductive heating elements 32 and away from the resistance heating elements 31.

[0078] In this way, the influence of the close distance between the temperature measuring elements 60 and the heating elements on temperature control can be avoided as much as possible. Generally, electromagnetic heating is used when the temperature of the mold is greatly different from the preset temperature, and relative to the large temperature difference at this time, the temperature measured by the temperature measuring elements is less affected by the heating elements, and the influence on temperature control is also small; resistance heating is generally used for mold temperature maintenance or small-range temperature adjustment, at which time the temperature of the mold is less different from the preset temperature, and compared with the small temperature difference at this time, the temperature measuring elements 60 are greatly affected by the heating elements, and the influence on temperature control is large. For example, when the temperature is close to a certain range of the first threshold temperature, the inductive heating elements are powered off, and the resistance heating elements are powered on, so that the temperature rises more smoothly, preventing overheating.

[0079] The temperature measuring elements 60 can be used to collect temperature signals and transmit the temperature signals to a temperature collection module in the temperature control system, which is analyzed and processed by the temperature control system, and according to the set temperature and temperature control logic, the inductive heating and resistance heating are automatically switched to achieve the best heating and energy-saving effect.

[0080] As a non-limiting embodiment, the heating method of the tire vulcanizing device according to the present application can optionally include the following steps:

[0081] A tire vulcanizing device 100 is provided, which can have a composite electric heating device 30 as described above.

[0082] When the temperature of the mold body 10 is below the first threshold temperature, the inductive heating element 32 can be energized to warm up the mold via inductive heating to the first threshold temperature.

[0083] When the temperature of the mold body 10 is at or above the first threshold temperature, the inductive heating element 32 can be de-energized and the resistive heating element 31 can be energized to maintain the temperature of the mold body 10 via resistive heating.

[0084] Optionally, when the temperature of the mold body 10 is below a second threshold temperature, where the second threshold temperature is less than the first threshold temperature, the resistive heating element 31 and the inductive heating element 32 can be simultaneously energized to collectively warm up the mold body 10 via inductive heating and resistive heating to the second threshold temperature.

[0085] The tire curing apparatus 100 can also be connected to a control system (e.g., a temperature control system or a temperature control module of a curing press control system) with a controller. The controller can include, for example, a processor and a memory. The memory can be used to hold instructions stored therein that, when executed by the processor, can cause the controller to perform the methods, steps, or control techniques described above, etc. The processor can include a microprocessor unit and / or other types of circuitry.

[0086] It should be appreciated that the heating methods of the tire curing apparatus described above can be stored as executable instructions in a non-transitory memory and can be executed by a control system including a controller in combination with various sensors, actuators, and other hardware. As such, the various steps and / or operations shown can be performed in the order shown or in parallel, or in some cases, omitted. Also, the order of steps to achieve the features and advantages of the example embodiments described herein is not essential; it is provided for ease of illustration and description. Depending on the particular strategy of the heating methods of the tire curing apparatus, one or more of the steps and / or operations shown can be performed repeatedly. Moreover, the described steps and / or operations can represent code to be programmed into a non-transitory memory of a computer readable storage medium to be executed by a curing press system, where the described steps are performed by executing instructions in a system including various hardware components and in combination with an electronic controller. If desired, one or more steps of the heating methods described herein can be omitted.

[0087] As a non-limiting example: the temperature measuring element 60 (e.g. temperature sensor) can transmit the detected temperature information to the temperature control system through the temperature acquisition module, and the temperature control system receives the temperature information and automatically adjusts the temperature according to the internal program setting. For example, when the temperature sensor transmits the measured temperature of the measured part of the mold body 10 below the first temperature threshold, for example, below a certain range of the first temperature threshold (the temperature range can be set to 10℃-30℃, etc.), the temperature control system automatically switches to the inductive heating mode to make the temperature quickly approach the first temperature threshold after the internal program is judged. As an example, the first temperature threshold can be approximately equal to the vulcanization temperature used for tire vulcanization. When the temperature measuring element 60 transmits the mold temperature equal to or greater than the first temperature threshold, the temperature control system stops the inductive heating system and automatically switches to resistance heating, so that the entire electric heating system is in a temperature holding or slow heating state.

[0088] As an optional heating step, inductive heating is mainly used when the mold preheating stage, the mold opening time is too long, or the mold is cleaned on the machine, causing the mold temperature to drop too much; when the temperature reaches a certain range of the set temperature or exceeds the set temperature, resistance heating is mainly used. In addition, when a large amount of heat is required, for example, when the temperature of the mold is lower than the second temperature threshold, the inductive and resistance heating methods can be operated simultaneously.

[0089] The embodiments of the present application can comprehensively utilize the advantages of inductive heating and resistance heating, and when the preheating stage or the temperature difference between the current temperature and the set temperature is large, and a large amount of heat is required, the inductive heating can be used to quickly reach the set temperature of the workpiece such as the mold body 10 due to its high efficiency and fast heating; when the mold body 10 reaches the set temperature or the heat requirement is small, the resistance wire can be used to provide heat, which can be less power and reduce energy consumption, and facilitate temperature control. In particular, when the temperature of the mold body 10 is particularly low and / or requires faster heating, inductive heating and resistance heating can be performed simultaneously to further improve the heating efficiency.

[0090] In addition, by using the tire vulcanization device and the heating method, the resistance wire can be prevented from running for a long time, the wear of the resistance wire can be reduced, and the service life of the resistance heating element can be effectively increased.

[0091] The terms denoting the position or orientation and the words "first", "second" and the like used herein to indicate the order are only for the better understanding of the concept of the present application shown in the preferred embodiments by the person of ordinary skill in the art, and are not used to limit the present application. Unless otherwise specified, all orders, positions or orientations are only for the purpose of distinguishing one element / component / structure from another element / component / structure, and unless otherwise specified, do not indicate any particular order, sequence of operation, direction or orientation. For example, in alternative embodiments, the "first side" can be the "second side", and the "first temperature threshold" can instead refer to the "second temperature threshold".

[0092] In summary, the tire vulcanization device 100 according to the embodiments of the present application overcomes the drawbacks in the prior art, and achieves the intended object of the present application.

[0093] Although the above describes the tire vulcanization device of the present application in conjunction with the preferred embodiments, it should be recognized by those of ordinary skill in the art that the above examples are only for illustration and cannot be regarded as a limitation of the present application. Therefore, various modifications and variations can be made to the present application within the spirit and scope of the claims, and these modifications and variations will all fall within the scope of the claims required by the present application.

Claims

1. A heating method for a tire vulcanizing apparatus, characterized by, The tyre vulcanisation device comprises: a mould body (10) comprising an upper portion (11), a lower portion (12) and a circumferential portion (13) arranged between the upper portion and the lower portion, the upper portion (11), the lower portion (12) and the circumferential portion (13) defining a mould cavity (14); and an electric heating device (20) comprising an upper heating device (21) for heating the upper portion (11), a lower heating device (22) for heating the lower portion (12) and a circumferential heating device (23) for heating the circumferential portion (13), wherein at least one of the upper heating device (21), the lower heating device (22) and the circumferential heating device (23) is arranged as a composite electric heating device (30), and wherein the composite electric heating device comprises a resistive heating element (31) and an inductive heating element (32), and the resistive heating element (31) and the inductive heating element (32) are arranged in a recess of the same component of the tyre vulcanisation device (100); the heating method comprises the following steps: providing the tyre vulcanisation device (100); when the temperature of the mould body (10) is lower than a first threshold temperature, energising the inductive heating element (32) to warm up the mould body (10) to the first threshold temperature via inductive heating; when the temperature of the mould body (10) is equal to or higher than the first threshold temperature, de-energising the inductive heating element (32) and energising the resistive heating element (31) to regulate the temperature of the mould body (10) via resistive heating.

2. The heating method of a tire vulcanizing apparatus according to claim 1, characterized by, The resistive heating element (31) is arranged closer to the mould cavity (14) than the inductive heating element (32).

3. The heating method of a tire vulcanizing apparatus according to claim 1, characterized by, The resistive heating element (31) and the inductive heating element (32) are arranged at the same distance from the mould cavity (14) of the mould body (10), and the resistive heating element and the inductive heating element are arranged alternately in sequence.

4. The heating method of a tire vulcanizing apparatus according to claim 1, characterized by, The tyre vulcanisation device further comprises a magnetically permeable element (40) arranged on the side of the inductive heating element (32) opposite the mould body (10).

5. The heating method of a tire vulcanizing apparatus according to any one of claims 1 to 4, characterized in that, The tyre vulcanisation device further comprises a thermally insulating element (50) arranged on the side of the electric heating device (20) opposite the mould cavity (14) of the mould body (10).

6. The heating method of a tire vulcanizing apparatus according to any one of claims 1 to 4, characterized in that, The upper heating device (21) or the lower heating device (22) is arranged as the composite electric heating device (30), and the composite electric heating device (30) further comprises a plate body (33) made of a thermally and electrically conductive material, wherein a first side of the plate body (33) is arranged in contact with the mould body (10), and a second side of the plate body (33) is provided with the recess.

7. The heating method of a tire vulcanizing apparatus according to any one of claims 1 to 4, characterized in that, Said circumferential heating device (23) is provided as said combined electric heating device (30) and said circumferential portion (13) is provided with said recesses, which are circumferential recesses.

8. The heating method of a tire vulcanizing apparatus according to any one of claims 1 to 4, characterized by, Said vulcanization device for tyres also comprises temperature measuring elements (60) provided in the area of said electric heating device (20) close to said mould body (10).

9. The heating method of a tire vulcanizing apparatus according to claim 8, characterized by, Said temperature measuring elements (60) are provided in said upper heating device (21) and in said lower heating device (22) and are arranged in the same plane close to said mould body (10); or said temperature measuring elements (60) are provided in said circumferential portion (13) and are distributed in the same annular surface of said circumferential portion (13).

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