Method for self-adaptively adjusting tire vulcanization time

Abstract

The invention discloses a method for adaptively adjusting tire vulcanization time, and relates to the technical field of tire production. By monitoring and calculating key elements in the tire production process, the vulcanization time of the tire can be adjusted in real time. Compared with a previous tire vulcanization production method, the problems that in the tire vulcanization production process, the safety time of the technology is long, the over-vulcanization degree of the tire is high, the performance of the tire is reduced, and meanwhile energy waste is large are solved. And the problems that the vulcanization time cannot be adjusted in real time in the conventional tire vulcanization method and the vulcanization is insufficient under certain extreme conditions can be effectively avoided, and the process safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tire production, and in particular to a method for adaptively adjusting tire vulcanization time. Background Art

[0002] At present, the vulcanization time of tires in the industry is basically determined by foaming tests. Experience shows that the performance of tires can be optimized by using the time when the tires are not foaming (i.e., the foaming point) as the vulcanization time. However, due to the fluctuations of various key factors in the manufacturing process, the process risk is too high when a certain foaming point is used as the vulcanization time. Therefore, it is necessary to increase the safety time on the basis of the foaming point to ensure the safety of the vulcanization process. This safety time needs to give priority to the risk of under-sulfurization, so it is generally set to be relatively long, resulting in a high degree of over-sulfurization of the tires. While the tire performance is reduced, energy waste is also large. Moreover, because the tire vulcanization time is set to a fixed value and cannot be adjusted in real time, under-sulfurization may occur in some extreme cases (such as too low ambient temperature, too slow rubber vulcanization speed, and too large tire size).

[0003] In the vulcanization process, the factors affecting the safety time mainly include the fluctuation of the vulcanization characteristics of the rubber, the size fluctuation of the tire blank, the change of the ambient temperature of the vulcanization workshop and the condition of the vulcanization equipment, etc. Among them, the first three factors have the greatest impact.

[0004] In order to solve the above problems, the present invention proposes a method for adaptively adjusting the tire vulcanization time. During the production process, the fluctuation values ​​of these influencing factors are monitored in real time and fed back to the vulcanization PLC controller. The tire vulcanization time is adjusted in real time through preset calculation logic, thereby improving the production efficiency and process safety of the tire vulcanization process and improving the tire quality. Summary of the invention

[0005] The purpose of the present invention is to provide a method for adaptively adjusting tire vulcanization time to solve the problems raised in the background technology:

[0006] In the existing tire vulcanization production process, the vulcanization process has a long safety time and the tire has a high degree of over-sulfurization, which causes the tire performance to decline and wastes a lot of energy. In addition, because the tire vulcanization time is set to a fixed value and cannot be adjusted in real time, under-sulfurization may occur in some extreme cases.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A method for adaptively adjusting tire vulcanization time comprises the following steps:

[0009] S1: The tire raw materials are sequentially processed into qualified mixing, extrusion, calendering and molding, and the data of each stage are detected and recorded in the system, and marked with a unique tire embryo barcode before entering the vulcanization stage;

[0010] S2: Confirm the tire foaming point time based on the combination of actual measurement method, FEA analysis method and empirical formula;

[0011] S3: While measuring the foaming point, record the vulcanization characteristic information of the rubber material at the foaming position of the test tire, the size information of the foaming position, and the corresponding workshop ambient temperature during the foaming test as the reference value for real-time calculation of the tire vulcanization time;

[0012] S4: Collect tire temperature rise data through temperature measurement test, and then process the data through Van't Hoff equation to obtain the vulcanization degree of the tire foaming position, compare the time change corresponding to the foaming vulcanization degree in the quick test data, and calculate the tire vulcanization time fluctuation value caused by the fluctuation of the rubber vulcanization characteristics by combining the empirical formula;

[0013] S5: Calculate the tire vulcanization time fluctuation value caused by the size fluctuation of different foaming positions according to the tire foaming position and the empirical formula;

[0014] S6: Calculate the tire vulcanization time fluctuation value caused by the change of the vulcanization workshop ambient temperature according to the vulcanization workshop ambient temperature and the empirical formula;

[0015] S7: Combine the factors affecting tire vulcanization to set the increased safety time affected by other factors;

[0016] S8: Based on the comparison between the key element information recorded in real time and the key element data during the foaming test, the vulcanization time required for the tire blank is calculated and executed in real time through the calculation logic set in the PLC system.

[0017] Preferably, in the actual operation process, the actual measurement method in S2 finds the time when the tire just does not generate bubbles by gradually reducing and increasing the tire vulcanization time; the FEA analysis method simulates the temperature rise history of the tire by simulation analysis, so as to obtain the latest point of tire vulcanization, and then obtains the tire foaming point in combination with the vulcanization characteristics of the rubber at the latest point; the empirical formula method obtains the corresponding calculation formula by analyzing the historical foaming data of the same type of products; the combination of the actual measurement method, the FEA analysis method and the empirical formula obtains the approximate foaming point time by the empirical formula or the FEA analysis method, and then obtains the accurate foaming point based on the approximate foaming point time by gradiently increasing or reducing the time.

[0018] Preferably, in S4, the van't Hoff equation is as follows:

[0019]

[0020] Among them, T1 and T2 are vulcanization temperatures; t1 is the vulcanization time when the vulcanization temperature is T1; t2 is the vulcanization time when the vulcanization temperature is T2; K is the vulcanization temperature coefficient of the rubber material at the foaming position;

[0021] Based on the quick test data, the fluctuation value of the vulcanization characteristics of the rubber material at the foaming position under the condition of 190°C is obtained, and then the fluctuation value of the vulcanization time is calculated by the empirical formula, as follows:

[0022]

[0023] Where T is the temperature set for the tire vulcanization external temperature; X is the time increase corresponding to the foaming vulcanization degree under the condition of 190℃ for quick inspection; t a It is the fluctuation value of tire vulcanization time caused by the fluctuation of rubber vulcanization characteristics.

[0024] Preferably, the vulcanization temperature coefficient K has different values ​​corresponding to different tire formulations.

[0025] Preferably, in said S5, the foaming position includes a shoulder and a sub-mouth;

[0026] When the foaming position is located at the shoulder, the tire vulcanization time fluctuation value caused by the shoulder foaming size fluctuation is calculated as follows:

[0027]

[0028] When the foaming position is at the sub-mouth, the tire vulcanization time fluctuation value caused by the sub-mouth foaming size fluctuation is calculated as follows:

[0029]

[0030] θ=0.06T-7.5

[0031] Among them, t b1 and t b2 are the tire vulcanization time fluctuation values ​​generated when the shoulder and mouth sizes increase by Y mm; θ is the correction coefficient.

[0032] Preferably, in S6, based on the empirical formula, when the ambient temperature in the vulcanization workshop increases by Z°C, the tire vulcanization time fluctuation value caused by the change in the ambient temperature in the vulcanization workshop is calculated as follows:

[0033]

[0034] Among them, t c is the tire vulcanization time fluctuation value caused by the change of the ambient temperature in the vulcanization workshop. Preferably, the tire vulcanization time is calculated in S7 as follows:

[0035] t=t0+ta +t b +t c +Δt

[0036] Where t is the tire vulcanization time; t0 is the foaming point time; t a is the tire vulcanization time fluctuation value caused by the fluctuation of the rubber vulcanization characteristics; t b is the tire vulcanization time fluctuation value caused by the size fluctuation of different foaming positions; t c It is the fluctuation value of tire vulcanization time caused by the change of ambient temperature in the vulcanization workshop; Δt is the safety time increased by other factors.

[0037] Compared with the prior art, the present invention provides a method for adaptively adjusting tire vulcanization time, which has the following beneficial effects:

[0038] The present invention monitors and calculates key elements of the tire production process and adjusts the vulcanization time in real time, thereby avoiding the problem of long vulcanization time setting under normal circumstances and improving tire production efficiency and tire quality; and avoids the occurrence of insufficient vulcanization of the tire through adaptive adjustment of the vulcanization time, thereby improving process safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a flow chart of the method mentioned in Example 1 of the present invention. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] The present invention monitors and calculates key elements of the tire production process and adjusts the vulcanization time in real time, thereby avoiding the problem of long vulcanization time setting in general and improving tire production efficiency and tire quality; and avoids the occurrence of insufficient vulcanization of tires through adaptive adjustment of the vulcanization time and improves process safety. Specifically, it includes the following contents.

[0042] Embodiment 1:

[0043] See also Figure 1 The present invention provides a method for adaptively adjusting tire vulcanization time, comprising the following steps:

[0044] S1: The tire raw materials are sequentially processed into qualified mixing, extrusion, calendering, and molding, and the data of each stage are detected and recorded in the system, and marked with a unique tire embryo barcode, and then enter the vulcanization stage; the details are as follows:

[0045] Generally, tires need to go through several stages from raw materials to finished products, including mixing, extrusion, calendering, molding, and vulcanization. After the raw materials are evenly mixed in the mixing stage, rapid testing is required to confirm whether the process properties of the rubber, such as Mooney and sulfur change, are qualified. After passing the test, the semi-finished parts preparation stage such as calendering and extrusion is entered. At this stage, it is necessary to ensure that the key properties of the semi-finished parts, such as size and weight, are qualified. The molding process then combines the various components to form a tire embryo. After the tire embryo is assembled, the online scanning equipment can be used to confirm whether the tire embryo is abnormal, and the tire embryo size information is measured and recorded. These detections at each stage are recorded in the system and marked with a unique tire embryo barcode before entering the vulcanization stage.

[0046] The vulcanization process can obtain data information of each tire process by scanning the tire embryo barcode, including tire sulfur change data and tire embryo size data. The real-time ambient temperature of the vulcanization workshop can be obtained through the real-time ambient temperature monitoring device set at the front end of the machine, thus completing the collection of key vulcanization factors and recording them in the vulcanization PLC control system.

[0047] S2: Confirm the tire foaming point time based on the combination of actual measurement method, FEA analysis method and empirical formula; the details are as follows:

[0048] Vulcanization is the last step in the tire manufacturing process from raw materials to finished tires. Temperature, pressure and time are the three most important conditions in the vulcanization process. For a certain type of product, the vulcanization temperature and pressure will be determined in advance based on the product characteristics and performance requirements. Therefore, the confirmation of the vulcanization time is very important and directly related to the quality of the tire. To set the vulcanization time, it is necessary to first confirm the tire's foaming point t0.

[0049] We generally have three ways to confirm the foaming point of a tire: actual measurement, FEA analysis, and empirical formula.

[0050] The actual measurement method is the most commonly used and direct method. In actual operation, the time when the tire does not produce bubbles is found by gradually reducing and increasing the tire vulcanization time. This time is defined as the foaming point.

[0051] The FEA analysis method simulates the temperature rise process of the tire through simulation analysis, so as to obtain the latest point of tire vulcanization. The foaming point of the tire can be obtained by combining the vulcanization characteristics of the rubber at the latest point.

[0052] The empirical formula rule requires a large amount of basic data collection and analysis, because the foaming locations of products of the same type are common and the foaming time conforms to a certain calculation logic. The corresponding calculation formula can be obtained by analyzing the historical foaming data of products of the same type.

[0053] Generally, we confirm the bubble point by combining three methods. We get the approximate bubble point time by empirical formula calculation or FEA analysis. Then, based on this time, we gradually increase or decrease the time to get the accurate bubble point t0. This method can effectively reduce the loss of the tire when the bubble point is finally measured.

[0054] S3: While measuring the foaming point, record the vulcanization characteristic information of the rubber material at the foaming position of the test tire, the size information of the foaming position, and the corresponding workshop ambient temperature during the foaming test as the reference value for real-time calculation of the tire vulcanization time;

[0055] S4: Collect tire temperature rise data through temperature measurement test, and then process the data through Van't Hoff equation to obtain the vulcanization degree of the tire foaming position, compare the time change corresponding to the foaming vulcanization degree in the quick test data, and calculate the tire vulcanization time fluctuation value caused by the fluctuation of the rubber vulcanization characteristics by combining the empirical formula; the details are as follows:

[0056] t a The fluctuation of the vulcanization characteristics of the rubber compound is generated by collecting the temperature rise data of the tire through the temperature measurement test, and then processing the data through the Van't Hoff equation to obtain the vulcanization degree of the tire foaming position. The Van't Hoff equation is as follows:

[0057]

[0058] Wherein, T1 and T2 are vulcanization temperatures; t1 is the vulcanization time when the vulcanization temperature is T1; t2 is the vulcanization time when the vulcanization temperature is T2; K is the vulcanization temperature coefficient of the rubber at the foaming position, where the K value of rubbers with different formulas is different;

[0059] In real-time calculation, the change in time corresponding to the degree of foaming and vulcanization in the quick test data is compared, and then the change in time under the set vulcanization external temperature conditions is calculated using the Van't Hoff equation. The empirical formula is as follows: The time corresponding to the degree of foaming and vulcanization under the quick test condition of 190°C is increased by Xmin, and the tire vulcanization time fluctuation value caused by the fluctuation of the vulcanization characteristics of the rubber compound is calculated as follows:

[0060]

[0061] Where T is the temperature set for the tire vulcanization external temperature; t a It is the fluctuation value of tire vulcanization time caused by the fluctuation of rubber vulcanization characteristics.

[0062] S5: According to the location of tire foaming, the tire vulcanization time fluctuation value caused by the size fluctuation of different foaming locations is calculated in combination with the empirical formula; the details are as follows:

[0063] t b The size fluctuations at the foaming position cause the foamed products to have different tb The calculation logic is different, the empirical formula is as follows: the size of the foaming position increases by Ymm,

[0064] When the foaming position is located at the shoulder, the tire vulcanization time fluctuation value caused by the shoulder foaming size fluctuation is calculated as follows:

[0065]

[0066] When the foaming position is at the sub-mouth, the tire vulcanization time fluctuation value caused by the sub-mouth foaming size fluctuation is calculated as follows:

[0067]

[0068] θ=0.06T-7.5

[0069] Among them, t b1 and t b2 They are the fluctuation values ​​of tire vulcanization time when the shoulder and sub-mouth size fluctuations are Y respectively; θ is the correction coefficient, which has a high correlation with the external vulcanization temperature. For every 1°C increase in the external vulcanization temperature, θ increases by 0.06.

[0070] S6: Calculate the tire vulcanization time fluctuation value caused by the change of the vulcanization workshop ambient temperature based on the vulcanization workshop ambient temperature in combination with the empirical formula; the details are as follows:

[0071] t c It is caused by the change of ambient temperature in the vulcanization workshop. The impact of ambient temperature on different products is also different. The empirical formula is as follows: When the ambient temperature increases by Z℃, the fluctuation value of tire vulcanization time caused by the change of ambient temperature in the vulcanization workshop is calculated as follows:

[0072]

[0073] Among them, t c It is the tire vulcanization time fluctuation value caused by the change of ambient temperature in the vulcanization workshop.

[0074] S7: Combine the factors affecting tire vulcanization to set the increased safety time affected by other factors; the details are as follows:

[0075] Δt is the safety time increased by other factors. When the tire vulcanization time cannot be adaptively adjusted, Δt needs to include the combined influence of all factors such as the vulcanization characteristics of the rubber, the size of the tire blank, the change in ambient temperature, and the condition of the vulcanization equipment. Therefore, it is necessary to set a longer time (such as 20% to 30% of the foaming point). In this embodiment, a relatively short time can be set to ensure the safety of the vulcanization time (such as 3% to 10% of the foaming point).

[0076] S8: Based on the comparison between the key element information recorded in real time and the key element data during the foaming test, the vulcanization time required for the tire blank is calculated in real time and executed through the calculation logic set in the PLC system. The details are as follows:

[0077] The tire curing time calculation formula is as follows:

[0078] t=t0+t a +t b +t c +Δt

[0079] Where t is the tire vulcanization time; t0 is the foaming point time; t a is the tire vulcanization time fluctuation value caused by the fluctuation of the rubber vulcanization characteristics; t b is the tire vulcanization time fluctuation value caused by the size fluctuation of different foaming positions; t c It is the fluctuation value of tire vulcanization time caused by the change of ambient temperature in the vulcanization workshop; Δt is the safety time increased by other factors.

[0080] Embodiment 2:

[0081] The tire vulcanization time conditions are set based on the method of adaptively adjusting the vulcanization time of Example 1 for a tire factory's 12R22.5 model product, as follows:

[0082] Based on qualified mixing, extrusion, calendering and molding processes, the vulcanization stage is further entered to confirm the tire foaming point and corresponding key factors. For details, please refer to Table 1:

[0083] Table 1 Confirmation of foaming point and corresponding key factors

[0084]

[0085]

[0086] Real-time monitoring of key elements of vulcanized tires during vulcanization, see Table 2 for details:

[0087] Table 2 Real-time monitoring of key elements of vulcanized tires during vulcanization

[0088] Quick test sulfur change data corresponding to the foaming position rubber (190℃) 0.50min Foaming location size (mm) 39.0 Ambient temperature (℃) 28.5

[0089] Based on the calculation logic set in the PLC system, the vulcanization time required for the tire blank is calculated in real time and executed. For details, please refer to Table 3:

[0090] Table 3 Real-time adjustment of curing time after PLC operation

[0091]

[0092] Embodiment 3:

[0093] The tire vulcanization time conditions are set based on the method for adaptively adjusting the vulcanization time of a tire factory's 12.00R20 model product according to Example 1, as follows:

[0094] Based on qualified mixing, extrusion, calendering and molding processes, the vulcanization stage is further entered to confirm the tire foaming point and corresponding key factors. For details, please refer to Table 4:

[0095] Table 4 Confirmation of foaming point and corresponding key factors

[0096]

[0097]

[0098] Real-time monitoring of key elements of vulcanized tires during vulcanization, see Table 5 for details:

[0099] Table 5 Real-time monitoring of key elements of vulcanized tires during vulcanization

[0100] Quick test sulfur change data corresponding to the foaming position rubber (190℃) 0.67min Foaming location size (mm) 46.1 Ambient temperature (℃) 34.5

[0101] Based on the calculation logic set in the PLC system, the vulcanization time required for the tire blank is calculated in real time and executed. For details, please refer to Table 6:

[0102] Table 6 Real-time adjustment of curing time after PLC operation

[0103]

[0104] Embodiment 4:

[0105] The tire vulcanization time conditions of a tire factory's 7.00R16 model product based on the method of adaptively adjusting the vulcanization time in Example 1 are as follows:

[0106] Based on qualified mixing, extrusion, calendering and molding processes, the vulcanization stage is further entered to confirm the tire foaming point and corresponding key factors. For details, please refer to Table 7:

[0107] Table 7 Confirmation of foaming point and corresponding key factors

[0108] <![CDATA[Foaming point time t0]]> 21min Foaming point position Shoulder tread rubber Quick test sulfur change data corresponding to the foaming position rubber (190℃) 0.75min K value of rubber at foaming position 1.88 Foaming location size (mm) 29.0 Ambient temperature (℃) 35.5 Vulcanization external temperature (℃) 151

[0109] Real-time monitoring of key elements of vulcanized tires during vulcanization, please refer to Table 8 for details:

[0110] Table 8 Real-time monitoring of key elements of vulcanized tires during vulcanization

[0111] Quick test sulfur change data corresponding to the foaming position rubber (190℃) 0.82min Foaming location size (mm) 28.7 Ambient temperature (℃) 30.0

[0112] Based on the calculation logic set in the PLC system, the vulcanization time required for the tire blank is calculated in real time and executed. For details, please refer to Table 9:

[0113] Table 9 Real-time adjustment of curing time after PLC operation

[0114]

[0115] In summary, the average vulcanization time after real-time adjustment by the method of Example 1 is shortened, which also means that the overall energy consumption is reduced, that is, the cost is saved and it is in line with the current development trend of carbon emission reduction.

[0116] In the present invention, a ,t b ,t c Different products, different equipment, different vulcanization temperatures and other conditions will have different calculation and setting logics for Δt. The calculation method mentioned in the present invention is only based on the empirical formula obtained after analyzing the company's product data.

[0117] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for adaptively adjusting tire vulcanization time, characterized in that: The steps include: S1: The tire raw materials are sequentially processed into qualified mixing, extrusion, calendering and molding, and the data of each stage are detected and recorded in the system, and marked with a unique tire embryo barcode before entering the vulcanization stage; S2: Confirm the tire foaming point time based on the combination of actual measurement method, FEA analysis method and empirical formula; S3: While measuring the foaming point, record the vulcanization characteristic information of the rubber material at the foaming position of the test tire, the size information of the foaming position, and the corresponding workshop ambient temperature during the foaming test as the reference value for real-time calculation of the tire vulcanization time; S4: Collect tire temperature rise data through temperature measurement test, and then process the data through Van't Hoff equation to obtain the vulcanization degree of the tire foaming position, compare the time change corresponding to the foaming vulcanization degree in the quick test data, and calculate the tire vulcanization time fluctuation value caused by the fluctuation of the rubber vulcanization characteristics by combining the empirical formula; S5: Calculate the tire vulcanization time fluctuation value caused by the size fluctuation of different foaming positions according to the tire foaming position and the empirical formula; S6: Calculate the tire vulcanization time fluctuation value caused by the change of the vulcanization workshop ambient temperature according to the vulcanization workshop ambient temperature and the empirical formula; S7: Combine the factors affecting tire vulcanization to set the increased safety time affected by other factors; S8: Based on the comparison between the key element information recorded in real time and the key element data during the foaming test, the vulcanization time required for the tire blank is calculated and executed in real time through the calculation logic set in the PLC system.

2. A method for adaptively adjusting tire vulcanization time according to claim 1, characterized in that: The actual measurement method described in S2 is used to find the time when the tire does not generate bubbles by gradually reducing and increasing the tire vulcanization time during actual operation; the FEA analysis method simulates the temperature rise process of the tire by simulation analysis, thereby obtaining the latest point of tire vulcanization, and then combining the vulcanization characteristics of the rubber at the latest point to obtain the tire foaming point; The empirical formula method obtains the corresponding calculation formula by analyzing the historical foaming data of the same type of products; the combination of the actual measurement method, the FEA analysis method and the empirical formula obtains the approximate foaming point time through the empirical formula or the FEA analysis method, and then increases or decreases the time gradient based on the approximate foaming point time to obtain the accurate foaming point.

3. The method for adaptively adjusting tire vulcanization time according to claim 1, characterized in that: In S4, the van't Hoff equation is as follows: Wherein, T1 and T2 are vulcanization temperatures; t1 is the vulcanization time when the vulcanization temperature is T1; t2 is the vulcanization time when the vulcanization temperature is T2; K is the vulcanization temperature coefficient of the rubber compound; Based on the quick test data, the fluctuation of the vulcanization characteristics of the rubber at the foaming position under the condition of 190°C is obtained, and then the fluctuation value of the vulcanization time is calculated by the empirical formula, as follows: Where T is the temperature set for the tire vulcanization external temperature; X is the time increase corresponding to the foaming vulcanization degree under the condition of 190℃ for quick inspection; t a It is the fluctuation value of tire vulcanization time caused by the fluctuation of rubber vulcanization characteristics.

4. The method for adaptively adjusting tire vulcanization time according to claim 3, characterized in that: The vulcanization temperature coefficient K has different values ​​according to different tire formulations.

5. The method for adaptively adjusting tire vulcanization time according to claim 4, characterized in that: In said S5, the foaming position includes the shoulder and the sub-mouth; When the foaming position is located at the shoulder, the tire vulcanization time fluctuation value caused by the shoulder foaming size fluctuation is calculated as follows: When the foaming position is at the sub-mouth, the tire vulcanization time fluctuation value caused by the sub-mouth foaming size fluctuation is calculated as follows: θ=0.06T-7.5 Among them, t b1 and t b2 are the tire vulcanization time fluctuation values ​​generated when the shoulder and mouth sizes increase by Y mm; θ is the correction coefficient.

6. A method for adaptively adjusting tire vulcanization time according to claim 5, characterized in that: In S6, based on the empirical formula, when the ambient temperature in the vulcanization workshop increases by Z°C, the tire vulcanization time fluctuation value caused by the change in the ambient temperature in the vulcanization workshop is calculated as follows: Among them, t c It is the fluctuation value of tire vulcanization time caused by the change of ambient temperature in the vulcanization workshop.

7. The method for adaptively adjusting tire vulcanization time according to claim 6, characterized in that: The S7 calculates the tire curing time as follows: t=t0+t a +t b +t c +Δt Where t is the tire vulcanization time; t0 is the foaming point time; t a is the tire vulcanization time fluctuation value caused by the fluctuation of the rubber vulcanization characteristics; t b is the tire vulcanization time fluctuation value caused by the size fluctuation of different foaming positions; t c It is the fluctuation value of tire vulcanization time caused by the change of ambient temperature in the vulcanization workshop; Δt is the safety time increased by other factors.

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