JPH079457A - Vulcanization control method and vulcanization device - Google Patents

Abstract

PURPOSE:To vulcanize a tire under the optimum conditions not generating non-vulcanization or over-vulcanization at the time of the vulcanization treatment of the tire. CONSTITUTION:The vulcanization of a tire 48 to be vulcanized is started (steps 102-106) on the basis of the initialized conditions of the tire 48 to be vulcanized. Next, the temps. corresponding to the respective parts of the tire are measured (steps 108-112) and the most delay point is determined (steps 114, 116) from the temp. estimated by FEM analysis and the vulcanization degree of the most delay point and the vulcanization reactivity at every constitutional material are calculated (step 117) on the basis of the estimated temp. and the vulcanization time before the vulcanization reactivity reaches a predetermined value is estimated (step 118). The estimated vulcanization time is compared with a preset vulcanization time and a vulcanizer is subjected to feedback control (steps 120, 122) until reaching the estimated vulcanization time. The vulcanizer is stopped (step 124) when the tire is judged to be vulcanized in the optimum state at the point of time when the estimated vulcanization time is elapsed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vulcanization control method and a vulcanization system, and particularly to a vulcanization control for vulcanizing a material to be vulcanized such as rubber or plastic, for example, a tire, by a vulcanizer. A method and a vulcanization system.

[0002]

2. Description of the Related Art Conventionally, the processing conditions (temperature and time) for vulcanization of tires are such that several raw tires from a production lot to be vulcanized in advance are used as samples and the vulcanizer is loaded with the raw tires. Test vulcanization is performed by setting a predetermined temperature, a predetermined pressure, and a predetermined vulcanization time, and the internal temperature of the tire is measured to obtain the vulcanization degree, which is determined based on the vulcanization degree. That is, one or several tires in the same lot are vulcanized while measuring the temperature to determine optimum treatment conditions, and the vulcanization treatment of the remaining tires in the same lot is performed with these as fixed treatment conditions. .

The above-mentioned processing conditions for vulcanization have to be set with a high safety factor because various factors of variation must be taken into consideration. The causes of this variation include tire gauge, bladder condition, variation in rubber vulcanization rate,
There are variations in raw tire temperature, variations in atmospheric temperature, variations in mold temperature, variations in heat source, etc.

When the vulcanization treatment is performed under the treatment conditions having a high safety factor, the vulcanization time is substantially lengthened and the treatment efficiency is lowered. As a countermeasure, the temperature inside the tire is predicted by numerical calculation. It has been proposed (see Japanese Examined Patent Publication No. 4-73683 and Japanese Patent Laid-Open No. 1-113211).

[0005]

However, even if vulcanization is performed on the basis of the result of test vulcanization or the temperature predicted by numerical calculation, the variability of vulcanization due to the variability of individual materials within the same lot will be reduced. It cannot be resolved. Therefore, in order to reduce the number of unvulcanized tires in each lot, the safety factor must be increased. For this reason, the obtained tire includes the optimally vulcanized tire and the over-vulcanized tire.

In view of the above facts, the present invention is a vulcanization control that can optimally vulcanize a tire without vulcanizing or over-vulcanizing it when vulcanizing a material to be vulcanized such as a tire. The aim is to obtain a method and a vulcanization system.

[0007]

In order to achieve the above object, in the vulcanization control method of the present invention, the applied energy and the vulcanization reaction amount for each of a plurality of constituent materials constituting the material to be vulcanized The physical quantity related to the vulcanization reaction rate is determined in advance based on the vulcanization reaction characteristics that represent the relationship between the vulcanization reaction characteristics, and for each of a plurality of positions of the material to be vulcanized, a time series during vulcanization The boundary temperature of the material to be vulcanized is measured, the thermal conduction analysis is performed using the measured boundary temperature, the temperatures at the plurality of positions are estimated, and the vulcanization degree is calculated based on the estimated temperature. Based on the degree of vulcanization and the physical quantity related to the vulcanization reaction rate, the vulcanization reaction state quantities at the plurality of positions are calculated, and the vulcanization reaction state quantities obtained are all the vulcanization reaction state quantities until a predetermined value is reached. Calculate the energy to be added to the sulfur material Ri vulcanized control.

Further, in the vulcanization system of the present invention, the vulcanization reaction characteristics representing the relationship between the applied energy and the vulcanization reaction amount are measured in advance for each of the plurality of constituent materials constituting the material to be vulcanized. A step of previously obtaining a physical quantity related to the vulcanization reaction rate based on the vulcanization reaction characteristic, a step of accumulating the obtained physical quantity in a storage device, and a plurality of positions of the material to be vulcanized during vulcanization. Measuring the boundary temperature of the material to be vulcanized in time series, estimating the temperature at the plurality of positions by performing heat conduction analysis using the measured boundary temperature, and obtaining the vulcanization degree based on the estimated temperature; , For each of the plurality of positions, the vulcanization reaction state quantity of the plurality of positions based on the physical quantity read and read the physical quantity corresponding to each of the constituent materials included from the storage device, and the obtained vulcanization degree. The process you seek, Meta All vulcanization reaction state quantity contains a step of determining the energy applied to the vulcanized material until the predetermined value, and controlling vulcanized by the determined energy, a.

A tire can be used as the material to be vulcanized.

[0010]

In the vulcanization control method of the present invention, the relationship between the applied energy obtained from the vulcanization temperature and the vulcanization time and the vulcanization reaction amount for each of the plurality of constituent materials constituting the material to be vulcanized The vulcanization reaction characteristic that represents is measured in advance, and a physical quantity related to the vulcanization reaction rate is obtained in advance based on the vulcanization reaction characteristic. A material such as rubber or plastic can be used as the material to be vulcanized, and a tire can be used as described in claim 2.

At each of a plurality of positions of the material to be vulcanized, the boundary temperature of the material to be vulcanized is chronologically measured during vulcanization, and a thermal conduction analysis is performed by using the measured boundary temperature. The temperatures at multiple positions are estimated and the degree of vulcanization is calculated based on the estimated temperatures. The temperature can be estimated by using the finite element method, and the temperature inside the material to be vulcanized is determined by a heat conduction analysis using the finite element method without contacting the material to be vulcanized at a predetermined position inside the material to be vulcanized. Can be accurately estimated, and the vulcanization degree at each of the plurality of positions can be obtained.

Next, the vulcanization reaction state quantity at the plurality of positions is obtained based on the obtained vulcanization degree and the physical quantity related to the vulcanization reaction rate. This vulcanization reaction state quantity represents the degree of vulcanization reaction in the process of vulcanization, and is obtained from the pre-measured vulcanization reaction characteristics of each constituent material that constitutes the material to be vulcanized. The physical quantity related to the vulcanization reaction rate can be used for each constituent material.

Next, the energy to be added to the material to be vulcanized, which is obtained from the vulcanization temperature and the vulcanization time until all the obtained vulcanization reaction state quantities reach a predetermined value, which is determined in advance, is determined. As this predetermined value, a critical reaction value (for example, a value up to the time when vulcanization proceeds and bubbles are eliminated from the rubber) can be used. Further, as the energy, the energy until the vulcanization reaction state amount obtained for the latest vulcanization point reaches a predetermined critical reaction value is used. Since the latest vulcanization point is the position where vulcanization is most delayed, if the energy to be supplied to this latest vulcanization point is obtained, the energy to be supplied to other positions will be included.

By vulcanizing a material to be vulcanized such as a tire with the obtained energy, each material to be vulcanized can be minimized without producing unvulcanized portions that have not been vulcanized to a desired vulcanized state. It can be vulcanized with energy (optimal vulcanization conditions).

In this way, the vulcanization reaction state amount for each constituent material at a plurality of positions is calculated, and the energy until the predetermined value (critical reaction value) is reached is calculated to control the vulcanization of the material to be vulcanized. Therefore, each of the materials to be vulcanized to be vulcanized can be optimally vulcanized even if the characteristics of the constituent materials differ from lot to lot or with time.

The vulcanization system of the present invention can be roughly divided into a post-process for actually vulcanizing the material to be vulcanized and a pre-process until the vulcanization treatment. As the pre-process, for each of the plurality of constituent materials constituting the material to be vulcanized, the vulcanization reaction characteristics representing the relationship between the applied energy and the vulcanization reaction amount are measured in advance and based on the vulcanization reaction characteristics. It has a step of previously obtaining a physical quantity related to the vulcanization reaction rate and a step of accumulating the obtained physical quantity in a storage device. This physical quantity is obtained for each of the plurality of constituent materials that make up the material to be vulcanized, but the composition may differ even for the same type of constituent material, so when different lots or different manufacturing lots are used. Also calculates the physical quantity. Therefore, when the combination of a plurality of constituent materials is made different when manufacturing the material to be vulcanized, the characteristics may be different depending on the combination, and therefore it is preferable to obtain the physical quantity. The physical quantity is also obtained when the characteristics are expected to change due to changes over time. As a result, the storage device stores a physical quantity that is a composition or a characteristic when actually vulcanizing the material to be vulcanized.

In the post-process, the boundary temperature of the material to be vulcanized is measured in time series during vulcanization at each of a plurality of positions of the material to be vulcanized, and heat conduction analysis is performed using the measured boundary temperature. The process of estimating the temperature at a plurality of positions and calculating the degree of vulcanization based on the estimated temperatures, and the physical amount corresponding to each of the constituent materials included in each of the plurality of positions read from the storage device and read, and the calculated addition amount. A step of obtaining vulcanization reaction state quantities at a plurality of positions based on the degree of vulcanization, and a step of obtaining energy to be added to the material to be vulcanized until all the obtained vulcanization reaction state quantities reach a predetermined value determined in advance, And a step of controlling vulcanization by the calculated energy.

As described above, in the subsequent step, the physical quantity corresponding to the constituent material constituting the material to be vulcanized to be actually vulcanized, which is obtained in the previous step, is read from the storage device and used. The amount of vulcanization reaction state of the material to be vulcanized and the energy applied to the material to be vulcanized can be accurately obtained. Therefore, vulcanization of the material to be vulcanized is controlled by the energy until the vulcanization reaction state quantity at a plurality of positions reaches a predetermined value (critical reaction value). Optimum vulcanization can be achieved even when the properties of the materials are different.

[0019]

FIG. 1 shows an embodiment of a vulcanizer 10 to which the present invention is applied.

The vulcanizer 10 includes a mold unit 12 and
And a bladder unit 14 having a deformable bladder 14A.

The mold unit 12 is the upper mold 12
A and the lower mold 12B. The periphery of the mold unit 12 is covered with a jacket 16. A passage 18 is provided in the jacket 16 so that a heating fluid (for example, steam) flows through a pipe 20. The jacket 16 heats the side of the mold unit 12 corresponding to the tire peripheral surface.

Further, in order to heat the tire end surface side of the mold unit 12, an upper platen 22 and a lower platen 24 are disposed on the upper side and the lower side thereof.

The platens 22 and 24 are provided with passages 2 respectively.
2A and 24A are formed, and the heating medium is circulated through a pipe (not shown).

The bladder 14A includes the upper and lower rings 2
The upper ring 28 is fixed to the center post 32. The center post 32 is movably supported by a sleeve 34. Therefore, the bladder 14A can move according to the vertical movement of the center post 32.

The lower ring 30 is connected with pipes 36 and 38 for circulating a heating fluid such as steam, gas and hot water through the bladder 14A. Thereby, the bladder 14A is heated.

In this embodiment, three temperature sensors are provided in the vulcanizer 10 having the above structure. The first temperature sensor is a jacket temperature detection sensor 42 that detects the temperature in the pipe 20 for sending the heating fluid to the jacket 16. The second temperature sensor is the platen 2
The platen temperature detection sensor 44 detects the temperature of 4 (or 22). The third temperature sensor is the bladder unit 1
A bladder temperature detection sensor 46 for detecting the temperature of the inner space of the vulcanizer 10 surrounded by 4.

These temperature detection sensors 42, 44, 46
Are connected to the control device 70 (see FIG. 3) and are not in contact with the tires 48, respectively, but these temperature detection sensors 42, 44, 46 are analyzed by heat conduction analysis (FEM analysis).
It is used to predict the temperature inside the tire 48 from the detection result obtained from

Further, as shown in FIG.
In predicting the internal temperature, the thickness of the tire 48 differs depending on each part. Further, since the tire is formed of a plurality of constituent materials, the rubber and the like of each constituent material have different material characteristics. Therefore, in this embodiment, in order to specify the vulcanized state of the tire, the temperature inside the tire is predicted for each position (total 3 positions) of the center portion 48A, the hump portion 48B, and the bead portion 48C of the tire 48. . Along with this, as will be described in detail later, the vulcanization time is determined by grasping the vulcanization reaction state for each tire constituent material.

As shown in FIG. 3, the control device 70 has a C
It is composed of a microcomputer having a PU 72, a ROM 74, a RAM 76, and an input / output port (I / O) 78, which are connected to each other via a bus 80 so that commands and data can be exchanged with each other. ROM74
The control routine and the like described later are stored in the.

A jacket temperature detecting sensor 42, a platen temperature detecting sensor 44, and a bladder internal temperature detecting sensor 46 are connected to the input / output port 78, and the keyboard 8 is connected.
4, a monitor 86, and an external storage device 82 in which constants A _T and B _T representing vulcanization reaction rates (described later) of constituent materials of the tire are stored as a database are also connected. Also,
A vulcanization control drive device 88 for substantially driving the vulcanizer 10 is connected to the input / output port 78, and the control device 70 is provided.
The vulcanization state of the vulcanizer 10 is controlled by.

The keyboard 84 has an initial condition 47 as a setting condition, an initial boundary condition 49 and a tire internal temperature 51.
This is for inputting (boundary conditions), and the initial vulcanization time is set based on these setting conditions. The setting condition may be input from another device such as a host computer instead of being input from the keyboard 84, or may be stored in advance as data. .

The initial condition is, for example, the initial temperature of the raw tire before vulcanization, which is detected by a temperature sensor (not shown) provided outside the vulcanizer 10.
The initial boundary condition is a boundary condition that does not change with time, such as the thermal conductivity of rubber and internal heat generation, which is related to the physical properties of the tire.

Further, the temperature inside the tire is not actually detected, but the heat based on the Arrhenius equation is calculated based on the temperatures from the jacket temperature detecting sensor 42, the platen temperature detecting sensor 44, and the bladder inside temperature detecting sensor 46. Prediction is made by conduction analysis (FEM (finite element method) in this embodiment).

Here, the principle of optimizing the energy at the time of vulcanization (vulcanization time in this embodiment) as the basis for controlling the vulcanization of the tire in this embodiment will be described.

A plurality of raw rubbers used for forming a tire have different vulcanization reaction states depending on their respective material characteristics, even under the same vulcanization temperature and vulcanization time. This vulcanization reaction state is expressed as a quantitative vulcanization reaction state quantity, and the vulcanization reaction state is made to correspond to rubber torque (mechanical characteristics such as elasticity, for example, torsional reaction force of tire) under the same conditions. There is a method in which the fluctuation of torque is measured and this characteristic is measured as the vulcanization reaction characteristic of raw rubber. FIG. 4 shows a vulcanization reaction curve, which is a vulcanization reaction characteristic when a change in torque (mechanical characteristics such as elasticity) with time is measured while vulcanizing one raw rubber at a predetermined vulcanization temperature. It was

The present inventor has paid attention to the fact that the vulcanization reaction curve approximates to the curve of the normal probability distribution function with the vulcanization degree as a parameter shown in the following formula (1), and for each constituent material of the tire. Using the vulcanization reaction curve, the vulcanization reaction characteristics of each constituent material were made into a database by numerically modeling the vulcanization reaction characteristics of all constituent materials of the tire. FIG. 5 shows a vulcanization reaction curve (solid line in FIG. 5) until the torque becomes maximum and a curve of a normal probability distribution function (dotted line in FIG. 5).

[0037]

[Equation 1]

[0038] However, 0 <t <∞ t: vulcanization time T _CONST: vulcanizing temperature (constant) t ^*: vulcanization degree (the following formula (2), computed from the formula Arureniusu) A _T, B _T: Physical constant

[0039]

[Equation 2]

However, To: standard temperature E: activation energy R: gas constant T: vulcanization temperature t: vulcanization time Next, this normal probability distribution function is converted into a variable and shown in the following equation (3). Obtain the lognormal probability distribution function.

[0041]

[Equation 3]

However, A _T , B _T : Physical constant η: Normal probability normalization variable From the above equation (3), the curve in the lognormal probability distribution function of each constituent material is the physical constant A _T by the least square method or the like. , B _T as a coefficient and the degree of vulcanization t ^* as a parameter is approximated by a straight line. Further, FIG. 6 shows a differential curve obtained by differentiating a function having the vulcanization reaction curve. This differential value is considered to represent the progress rate of vulcanization (hereinafter referred to as vulcanization reaction rate), and corresponds to the normal probability normalized variable η. Therefore, the vulcanization reaction rate of each constituent material is
Equation (3) Physical constants A _T is the value of the constant term can be represented by B _T, the physical constants A _T, the material for each of the vulcanization reaction to be vulcanization degree Oke seeking B _T for each constituent material The speed can be calculated. Therefore, these constants A _T , B _T
Is calculated for all the constituent materials of the tire and stored in the external storage device 82 as a database.

The characteristics of the vulcanization reaction rate can be approximated to a normal distribution. Therefore, the present inventor made the vulcanization reaction rate curve of the constituent materials until the vulcanization is completed (for example, the torque becomes maximum) correspond to the normal distribution with the vulcanization time as a parameter, and the vulcanization was completed. The ratio of the vulcanization reaction state to the constituent material and the vulcanization reaction state at the time of the predetermined vulcanization degree t ^* is defined as the vulcanization reaction rate U.

As described above, although the tire is made of a plurality of constituent materials, the vulcanization reaction rate U is the vulcanization degree t ^*.
Can be determined for each constituent material.

The vulcanization reaction rate U is a state (so-called, the so-called, relationship between polymer compounds that are raw materials of raw tire (bond between polymer and sulfur), which is obtained by vulcanizing the tire at a constant temperature. It can be regarded as the density of the mesh. Vulcanization reaction rate U obtained using this vulcanization degree t ^*
Is shown in the following equation (4).

[0046]

[Equation 4]

FIG. 7 shows the correspondence between the vulcanization degree and the vulcanization reaction rate, taking three types of constituent materials as examples. Thus, it is understood that the vulcanization reaction rate is different even if the vulcanization degree is the same.

Therefore, the vulcanization reaction state of the tire can be specified by obtaining the vulcanization reaction rate U for the current vulcanization degree t ^* from the vulcanization degree-vulcanization reaction rate curve of the slowest member. . At this time, since the vulcanization reaction rate U until the completion of vulcanization is obtained, the vulcanization time can be predicted, and the vulcanization time based on the slowest member can be predicted. Thereby, the vulcanization of the tire can be optimally controlled by vulcanizing until the vulcanization reaction rate U of the slowest member exceeds the predetermined vulcanization reaction rate U.

Further, in this embodiment, the vulcanization reaction rate U for determining the completion of vulcanization is used as a critical reaction value, and a predetermined critical reaction rate Ub is used. This critical reaction rate Ub is
Vulcanization reaction rate U of constituent materials that have been vulcanized to a state that is practically acceptable by experiments such as a test of the determination point of the presence or absence of bubbles
Is. The critical reaction rate Ub can be determined according to the degree of vulcanization required by the tire to be obtained.

The operation of this embodiment will be described below. In this embodiment, the vulcanization reaction rate U as the vulcanization reaction state quantity is obtained by FEM analysis based on the above-mentioned setting conditions, and the vulcanization time is predicted from the obtained vulcanization reaction rate.

The predicted vulcanization time is compared with the actual vulcanization time during which the vulcanizer 10 is vulcanized and controlled, and it is judged whether or not the actual vulcanization time has reached the predicted vulcanization time. Then, the vulcanizer 10 is feedback-controlled. This vulcanizer 10
When the predicted vulcanization time has passed, it is judged that the vulcanization is optimal and the vulcanization is stopped.

The vulcanization control procedure of the vulcanizer 10 will be described in detail with reference to the flowchart of FIG. Step 10
In 2, the initial conditions of the tire 48 to be processed by the vulcanizer 10 are input, and then the initial boundary conditions are input in step 104, then the process proceeds to step 106 and the vulcanization by the vulcanization control drive device 88 ( Heating) is started, and the process proceeds to step 108.

In the next steps 108, 110 and 112, the detection result from the jacket temperature detection sensor 42, the detection result from the platen temperature detection sensor 44 and the detection result from the bladder temperature detection sensor 46 are fetched respectively, and the process proceeds to step 114. Then, heat conduction analysis is performed.

Here, in the heat conduction analysis, the center portion 48A, the hump portion 48B, and the bead portion 48C of the tire 48 are first calculated by FEM calculation based on the temperatures obtained in steps 108, 110, and 112. The temperature inside the tire is predicted for the positions (total of 3 positions). Generally, since the hump portion 48B has the largest wall thickness,
If the hump portion 48 is completely vulcanized, other parts should be vulcanized, but another part may be vulcanized later depending on the properties of the rubber forming the green tire and the laminated state of the rubber. It may be vulcanized or the vulcanization state may differ even within the same part. Therefore, in the present embodiment, the heat conduction analysis is performed based on each of the tire internal temperatures of the center portion 48A, the hump portion 48B, and the bead portion 48C of the tire 48.

In the next step 116, the position where the vulcanization is delayed most (the most delayed point) is determined based on the temperatures inside the tire at the above-mentioned three positions because the degree of heat conduction is low.

In the next step 117, the vulcanization degree t ^* is obtained from the predicted temperature obtained by the heat conduction analysis for the determined latest point (see the equation (2)). Further, the respective constituent materials in determined slowest point, constant A _T representing the vulcanization reaction rate, and reads B _T from the external storage device, read constants A _T, pressure of the constituent material with a B _T The sulfur reaction rate U is determined.

At the next step 118, the vulcanization predicted time t _F until the vulcanization is completed is calculated based on the obtained vulcanization reaction rate U of each constituent material. That is, the critical reaction rate Ub
Is read to obtain the difference between the vulcanization reaction rate U of each constituent material and the read critical reaction rate Ub with respect to the vulcanization degree t ^{* at} the latest point. Since the constituent material having the largest difference is the constituent material that is closest to the unvulcanized material, the vulcanization reaction rate U of this constituent material is
The ultimate vulcanization degree when the critical reaction rate Ub is reached is determined. From this ultimate vulcanization degree and the current vulcanization degree, the vulcanization predicted time t _F until all the constituent materials at the latest point reach the critical reaction rate Ub, that is, until the vulcanization is completed, is calculated. .

In the next step 120, the actual vulcanization time t _R controlled by the vulcanization control drive device 88 is read, and in step 122 the actual vulcanization time t _R.
R and the vulcanization predicted time t _F are compared.

When it is judged at step 122 that t _R <t _F, it is judged that the set vulcanization reaction state has not been reached, and the routine proceeds to step 106, where the temperature of each part is detected and the heat conduction analysis is carried out. (Steps 106 to 12)
0). As described above, the FEM analysis is sequentially performed until the estimated vulcanization time is reached, and the optimum vulcanization time is sequentially obtained.

When it is judged at step 122 that t _R ≧ t _F, it is judged that the set vulcanization reaction state has been reached, and the routine proceeds to step 124, where the vulcanization control is stopped, and the processing ends. To do.

A comparison value when the system in which the vulcanization reaction rate of this example was used as the judgment standard was applied, where 100 was the case where vulcanization was controlled on the basis of data such as test vulcanization by a conventional vulcanizer. Are shown in Table 1 below.

[0062]

[Table 1]

However, the quality includes drum durability and abrasion resistance. As described above, the vulcanization degree during vulcanization is specified by predicting the tire temperature by FEM analysis and the vulcanization degree obtained from the predicted temperature and the vulcanization reaction rate obtained for each constituent material of the tire. Since the vulcanization time is controlled by using the vulcanization time, it is possible to obtain a vulcanized tire without variation between the same lots, and vulcanization is performed by the vulcanizer even if the constituent material is changed. A vulcanized tire can be obtained without variation in the vulcanization reaction state of the tire. Therefore, it is possible to realize a vulcanizer that can stably supply high quality tires.

In the above example, the energy for vulcanization to be supplied to the tire by changing the vulcanization time at a constant vulcanization temperature was used, but the energy for vulcanization was changed by changing the vulcanization temperature. It may be controlled.

[0065]

As described above, according to the present invention, it is possible to grasp the vulcanization reaction state of each of the constituent materials constituting the material to be vulcanized such as the tire during the vulcanization treatment. Since vulcanization is controlled using the amount of reaction state as a judgment factor, optimum vulcanization conditions can be set for each vulcanized material or optimum energy can be supplied, and vulcanized material vulcanized with stable quality Can be provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an internal structure of a vulcanizer to which this embodiment is applied.

FIG. 2 is an axial sectional view of a tire.

FIG. 3 is a block diagram showing a schematic configuration of a control device.

FIG. 4 is a diagram showing a vulcanization reaction curve showing the relationship between vulcanization time and torque when vulcanizing at a predetermined vulcanization temperature.

FIG. 5 is a diagram showing up to the maximum torque of FIG.

FIG. 6 is a diagram showing the differential characteristic of FIG.

FIG. 7 is a diagram showing a relationship between a vulcanization degree and a vulcanization reaction rate.

FIG. 8 is a flowchart showing a flow of vulcanization control in the vulcanizer of this embodiment.

[Explanation of symbols]

 10 Vulcanizer 48 Tire 70 Control Device 82 External Storage Device

Claims (3)

[Claims] 1. A vulcanization reaction characteristic representing a relationship between applied energy and a vulcanization reaction amount is measured in advance for each of a plurality of constituent materials constituting the material to be vulcanized, and based on the vulcanization reaction characteristic. A physical quantity related to the vulcanization reaction rate is obtained in advance, and for each of a plurality of positions of the material to be vulcanized, the boundary temperature of the material to be vulcanized is measured in time series during vulcanization and the measured boundary temperature is used. The thermal conductivity analysis is performed to estimate the temperature at the multiple positions, and the vulcanization degree is calculated based on the estimated temperatures.The plural positions are calculated based on the calculated vulcanization degree and the physical quantity related to the vulcanization reaction rate. Of the vulcanization reaction state amount of the vulcanization reaction, obtain the energy to be added to the material to be vulcanized until all the obtained vulcanization reaction state amount reaches a predetermined value, and control the vulcanization by the obtained energy. Control method. 2. The vulcanization control method according to claim 1, wherein the material to be vulcanized is a tire. 3. A vulcanization reaction characteristic representing a relationship between applied energy and a vulcanization reaction amount is measured in advance for each of a plurality of constituent materials constituting the material to be vulcanized, and based on the vulcanization reaction characteristic. A step of previously obtaining a physical quantity related to the vulcanization reaction rate, a step of accumulating the obtained physical quantity in a storage device, and a material to be vulcanized in time series during vulcanization for each of a plurality of positions of the material to be vulcanized. The step of determining the vulcanization degree based on the temperature estimated by estimating the temperature of the plurality of positions by performing a heat conduction analysis using the measured boundary temperature of the measured boundary temperature of each of the plurality of positions, A step of obtaining a vulcanization reaction state quantity at the plurality of positions based on a physical quantity obtained by reading and reading the physical quantity corresponding to each of the constituent materials contained in the storage device, and the obtained vulcanization degree; Vulcanization reaction state quantity Vulcanizing system comprising a step of determining the energy applied to the vulcanized material until a predetermined value determined because, and a step of controlling vulcanized by the determined energy.