JPH0780843A - Vulcanization control method - Google Patents

Abstract

PURPOSE:To carry out the vulcanization without causing irregularity in a vulcanization state and enhanced the productivity or quality by estimating the energy at the time of next vulcanization so that the fluctuation tendency of energy calculated between a plurality of materials to be vulcanized enters into a specific range and controlling next vulcanization on the basis of this estimation. CONSTITUTION:In vulcanization treatment, the update data at the time of initial vulcanization stored in an external memory device as a data base is read, for example, five times and a vulcanization state value is estimated from the read data to judge whether the vulcanization state value is within a specific tolerance range. When the estimated value is within the tolerance range, a tire is vulcanized as it is and, when the value is out of the torelance range, the energy for vulcanizing the tire 48 is determined while the vulcanization state value is held within the torelance range. That is, the energy allowing all of the values of a vulcanization time, a vulcanization degree and the max. temp. to enter the torelance range is operated to determine the energy at the time of the next vulcanization of the tire. The temp. of the heating fluid supplied to a jacket 16 and upper and lower platens 22, 24 is altered by the determined energy to be reflected to the next tire 48.

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 more particularly to a vulcanization control method in which a vulcanization material such as a tire is vulcanized by a vulcanizer.

[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. This variation factor includes tire gauge, bladder gauge, variation in rubber vulcanization rate, variation in raw tire temperature, variation in ambient temperature,
There are variations in mold temperature and heat source.

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, as shown in FIG. 8, due to long-term cycle temperature fluctuations due to seasonal changes such as summer and winter, and short-term cycle temperature fluctuations due to temperature changes such as day and night, The environmental temperature of the vulcanizer fluctuates (solid line G).
Therefore, in order to obtain a tire that is vulcanized in a stable state, the energy required for vulcanization must be changed, and the vulcanization time and vulcanization temperature must be adjusted. This adjustment must be made delicately and constantly, but since manual adjustment in real time is difficult, regular adjustments have been made frequently. Therefore, it has been a cause of deterioration of tire quality due to variation in vulcanization state due to adjustment error and productivity due to adjustment.

In view of the above facts, the present invention can provide a vulcanization control method capable of vulcanizing a material to be vulcanized such as a tire without variation in vulcanization state and improving productivity and quality. Is the purpose.

[0007]

In order to achieve the above object, the vulcanization control method according to claim 1 estimates the temperature at a plurality of positions inside the material to be vulcanized and at the same time delays the vulcanization latest point from the estimated temperature. Is determined, the vulcanization degree of the latest vulcanization point is calculated, the energy required to reach a predetermined vulcanization degree is calculated based on the calculated vulcanization degree, and based on the calculated energy Vulcanize the material to be vulcanized for a plurality of materials to be vulcanized, obtain the tendency of fluctuation of the energy between the plurality of materials to be vulcanized, and the tendency of fluctuation of the energy falls within a predetermined range set in advance. Thus, the energy at the time of vulcanizing the next material to be vulcanized is predicted, and vulcanization control of the next material to be vulcanized is performed based on the predicted energy.

According to a second aspect of the present invention, in the vulcanization control method according to the first aspect, the energy supplied to the material to be subsequently vulcanized to be vulcanized is varied based on the predicted energy. At this time, it is changed at a faster time by a predetermined time.

According to a third aspect of the present invention, in the vulcanization control method according to the first aspect, vulcanization of a plurality of positions of a vulcanization target material to be vulcanized at least next based on the predicted energy. The energy supplied to the material to be vulcanized is controlled so that the temperature, the maximum temperature and the vulcanization time do not exceed predetermined values.

According to a fourth aspect of the present invention, in the vulcanization control method according to the first aspect, when the energy supplied to the vulcanized material to be subsequently vulcanized is varied based on the predicted energy. Controls the energy so that the vulcanization time is minimum and the fluctuation is small.

[0011]

According to the vulcanization control method of the present invention, the temperatures at a plurality of positions inside the material to be vulcanized are estimated, and the position of the latest vulcanization point is determined from the estimated temperatures. Calculate the degree. The temperatures at a plurality of positions can be estimated by the finite element method (FEM) from the temperatures measured without contacting the material to be vulcanized, for example, the tire. The degree of vulcanization is calculated from the estimated temperature by the Arlenius equation or the like. Based on the calculated vulcanization degree, the energy required to reach a predetermined vulcanization degree, such as defining the end of vulcanization, is obtained. The material to be vulcanized is vulcanized based on the obtained energy. Such treatment is performed on a plurality of materials to be vulcanized.

When vulcanizing the next material to be vulcanized after finishing the above processing, the tendency of the required energy fluctuation, for example, vulcanization time fluctuation, is calculated among the calculated plural materials to be vulcanized. Then, the energy to be supplied at the time of vulcanizing the next material to be vulcanized is predicted and set so that this variation falls within a predetermined range. Vulcanization of the next material to be vulcanized is controlled based on the predicted energy. Therefore, even if the energy required for vulcanization changes with time, the fluctuation of the energy supplied to the material to be vulcanized, such as the vulcanization time, can be kept within a certain range. Further, as described in claim 4, when changing the energy supplied to the vulcanized material to be subsequently vulcanized based on the predicted energy,
If the energy to be supplied is controlled so that the vulcanization time is minimum and the fluctuation is small, the material to be vulcanized can be vulcanized with stable energy and with a short vulcanization time, and the productivity is improved.

According to the third aspect of the present invention, the vulcanization degree, the maximum temperature and the vulcanization time at a plurality of positions of the material to be vulcanized based on the predicted energy do not exceed a predetermined value. By controlling the vulcanization of the vulcanized material, the vulcanized material that has been vulcanized can be provided with stable quality.

When the energy such as the vulcanization temperature to be supplied to the material to be vulcanized is changed during vulcanization based on the energy predicted above, the energy is actually changed after the energy is changed as described in claim 2. The energy to be supplied is changed in a predetermined fast time corresponding to the time required to affect the vulcanization treatment. As a result, in a device for vulcanization such as a vulcanizer, even if a time delay occurs until the vulcanization process is affected after the energy is changed due to a machine difference or a difference in energy supply position, etc. Energy fluctuations are accurately reflected in the material to be vulcanized at the desired time,
It is possible to obtain a material to be vulcanized that has been vulcanized in an optimum state.

[0015]

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 provided on the upper side and the lower side of them.

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 detecting 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. Therefore, in this embodiment, in order to specify the energy (vulcanization temperature and vulcanization time) during vulcanization of the tire, the positions of the center portion 48A, the hump portion 48B, and the bead portion 48C of the tire 48 (total). Three
Position), the temperature inside the tire is predicted. Along with this, as will be described in detail later, the energy at the time of vulcanization is determined by grasping the fluctuation of the vulcanization reaction state of the tire.

As shown in FIG. 3, the control device 70 controls the 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 that stores the maximum temperature, the vulcanization time, and the vulcanization degree of each tire 48 during vulcanization as a database are also connected. A vulcanization control drive device 88 for controlling the vulcanization temperature and vulcanization pressure for substantially driving the vulcanizer 10 is connected to the input / output port 78, and the vulcanizer 10 is controlled by the controller 70. It is designed to control the energy during vulcanization.

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.

In addition, the temperature inside the tire is not actually detected, but a heat conduction analysis (mainly) is performed based on the measured temperature from the jacket temperature detecting sensor 42, the platen temperature detecting sensor 44, and the bladder inside temperature detecting sensor 46. In the example, F
Predict by EM (finite element method).

FIG. 4 shows a block diagram of the heat source control for controlling the energy during vulcanization in the vulcanization control drive device 88.

The boiler 90 is for supplying a heating fluid of a predetermined temperature and pressure, and the pressure control device 52.
Is connected to the valves 54 and 55 via. The pressure control device 52 includes a pressure controller (PRC) 52A, a diaphragm valve 52B and a pressure sensor 52C. The PRC 52A opens and closes the diaphragm valve 52B according to a signal from the pressure sensor 52C to adjust the pressure of the heating fluid supplied from the boiler 90 to a standard value.

The valve 55 communicates with the inside of the plader 14A via a piston valve 56. The piston valve 56 is connected to a timer device (not shown) so as to open and close at predetermined time intervals. Bladder 1
The heating fluid supplied into 4A is exhausted through an exhaust valve (not shown).

The valve 54 is a diaphragm valve 58,
It is connected to 59. The diaphragm valve 58 is in communication with the upper platen 22 via a valve 66, and the upper platen 22 is in communication with the lower platen 24 by a passage 68. An exhaust pipe 92 is provided in the lower platen 24 so that the heating fluid in the platen is exhausted by the exhaust valve 64.
Exhausted through. The exhaust pipe 92 is provided with a temperature sensor 62, and the temperature sensor 62 is connected to a temperature controller (TRC) 60. TRC60
Adjusts the temperature of the heating fluid supplied to the platen to a predetermined value by opening and closing the diaphragm valve 58 according to the signal from the temperature sensor 62. That is, the diaphragm valve 58 is opened and closed by the operation of the TRC 60, and the heating fluid is intermittently supplied to the platen.
The temperature in the platen rises according to the opening time of 8. The heating fluid in this case is generally steam. In addition, TRC
60 is connected to the control device 70, and a predetermined value of the temperature of the heating fluid is instructed and input from the control device 70.

The diaphragm valve 59 communicates with the jacket 16 via a valve 67. An exhaust pipe 93 is provided in the jacket 16, and the heating fluid in the jacket is exhausted via the exhaust valve 65.
The exhaust pipe 93 is provided with a temperature sensor 63, and the temperature sensor 63 is a temperature controller (TRC) 6
Connected to 1. The TRC 61 opens and closes the diaphragm valve 59 according to a signal from the temperature sensor 63 to adjust the temperature of the heating fluid supplied to the jacket to a predetermined value. In the operation of the TRC 61, the temperature inside the jacket rises according to the opening time of the diaphragm valve 59 as in the TRC 60. The TRC 61 is connected to the control device 70, and a predetermined value of the temperature of the heating fluid is instructed and input from the control device 70.

Here, the plurality of raw rubbers used to form the tire have different vulcanization reaction states depending on their characteristics even under the same vulcanization temperature and vulcanization time. In the example, the vulcanization reaction state is quantitatively expressed as (vulcanization reaction rate or vulcanization reaction state amount). That is, the vulcanization reaction state indicates the rubber torque (rubber reaction force of rubber)
The physical constants representing the progress rate of vulcanization (hereinafter referred to as vulcanization rate) are obtained by a specific function approximation method from the vulcanization reaction characteristics obtained by measuring the time-dependent fluctuation of torque under the same conditions.
Based on this vulcanization rate, the ratio of the vulcanization reaction state at the current vulcanization degree t ^{* to} the vulcanization reaction state of the tire having the specified vulcanization degree (for example, the maximum torque) is determined as the vulcanization reaction rate. As specified. The vulcanization reaction rate may be obtained for each constituent material of the tire, and values such as an average value, a maximum value and a minimum value may be used.

This vulcanization reaction rate is a state (so-called mesh) in which the relationship between the polymer compounds as raw materials of the raw tire (the relationship between the polymer and sulfur) is represented by vulcanization of the tire at a constant temperature. ) Can be regarded as the density of.

In this way, the vulcanization reaction rate with respect to the current vulcanization degree t ^* is obtained, while the vulcanization reaction rate until the vulcanization is completed is obtained, and the vulcanization reaction rate required until the vulcanization is completed. The vulcanization time can be predicted by obtaining the degree of vulcanization. Further, as the vulcanization reaction rate for determining the optimum vulcanization state (vulcanization completed state), a critical reaction rate obtained by an experiment such as a determination point test for the presence or absence of bubble generation can be used.

The operation of this embodiment will be described below. The vulcanization control procedure of the vulcanizer 10 of this embodiment will be described in detail with reference to the flowcharts of FIGS. When the vulcanization process is started, the initial vulcanization process of step 100 of FIG. 5 is executed. In this step 100, several lines (5 in this embodiment)
This tire is vulcanized. In step 102 of FIG. 6, which is the initial vulcanization process, the initial conditions of the tire 48 to be processed by the vulcanizer 10 are input, and then step 104.
After the initial boundary conditions are input at, step 106
Then, a signal is output to the TRCs 60 and 61 to start the vulcanization (heating) drive in the vulcanization control drive device 88, and the process proceeds to step 108.

At 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. 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 slowly due to the properties of the rubber forming the raw tire, the laminated state of the rubber, and the like. In some cases, the vulcanization state may differ even within the same region. 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 most delayed (the latest point) is determined based on the tire internal temperatures at the three positions. Next, in step 117, the vulcanization degree t ^* is obtained from the predicted temperature obtained by the heat conduction analysis for the determined latest point. Further, in this step 116, the maximum temperature Tmax at all positions is obtained. In the next step 118, the vulcanization predicted time t _F until the vulcanization is completed is calculated based on the obtained vulcanization degree t ^* at the latest point.

At the next step 120, the actual vulcanization time t _R controlled by the vulcanization control drive device 88 is read, and at 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 heat conduction analysis is performed. (Steps 106-120). Thus, until the estimated vulcanization time is reached, the F
EM analysis is performed to sequentially find the optimum vulcanization time.

On the other hand, when it is judged at step 122 that t _R ≧ t _F, it is judged that the set vulcanization reaction state has been reached, the routine proceeds to step 124, the vulcanization control is stopped, and the vulcanization is conducted at step 126. The time t _R , the degree of vulcanization t ^*, and the maximum temperature Tmax are stored as a database in the external storage device 82. In the next step 128, it is determined whether or not the vulcanization process has been performed a predetermined number of times (in this embodiment, five tires), and in the case of a negative determination, the process returns to step 106. On the other hand, if the determination is affirmative, this routine ends.

When the initial vulcanization of several tires is completed as described above, the external storage device 82 stores a plurality of pieces of information (for five tires in this embodiment) (vulcanization) in the external storage device 82. The time t _R , the degree of vulcanization t ^*, and the maximum temperature Tmax) are stored as a database.

When the initial vulcanization is completed, step 2 in FIG.
At 00, the next tire is vulcanized (main vulcanization) based on the information obtained during the initial vulcanization. Then, the main vulcanization of step 200 is executed until all the tires to be vulcanized are finished (step 300).

Next, the details of step 200 will be described with reference to FIG. Regarding the vulcanization treatment in FIG.
The same parts as those in the vulcanization process of FIG. 6 are designated by the same reference numerals, and detailed description thereof will be omitted. In step 202 of FIG. 7, information stored in the external storage device 82 as a database at the time of initial vulcanization is read. As the information to be read, the latest five times recorded are read. In this case, the information for five times stored in step 100 (during initial vulcanization) is read.

In the next step 204, the read information
From this, the vulcanization state value is estimated. For example, multiple information, etc.
Final sequence corresponding to difference sequence, geometric sequence or predetermined function
The vulcanization state value can be estimated. With this estimated vulcanization state value
Is the vulcanization time t_R, Degree of vulcanization t ^*And maximum temperature Tmax
Value, in this case, the current vulcanization conditions (energy during vulcanization)
When the next tire is vulcanized at
The value is expected to reach.

In step 206, it is judged whether the estimated vulcanization state value is within a predetermined allowable range. When the determination is affirmative, the vulcanization may be performed as it is, so the routine proceeds to step 106, where the vulcanization processing from step 106 to step 126 is performed in the same manner as above, and this routine is ended.

On the other hand, if the determination is negative, step 20
8, the energy for vulcanizing the tire is determined while maintaining the vulcanization state value within the allowable range, and step 210
Go to. That is, the energy at which all values of the vulcanization time t _R , the vulcanization degree t ^*, and the maximum temperature Tmax are within the allowable range is calculated, and the energy at the time of vulcanization of the next tire is determined.
In the present embodiment, the temperature of the heating fluid supplied to the jacket 16 and the upper and lower platens 22 and 24 shown in FIG. 4 is changed by the determined energy and reflected on the next tire. As another method of changing the energy for the next vulcanization, the temperature of the heating fluid in the tire vulcanization bladder 14A can be changed. For example, the energy supplied to the tire can be varied by using steam and gas as the heating fluid and making each temperature different and changing the timing of supplying any one of the heating fluids.

When the temperature control of the heat source is performed on the main body of the vulcanizer 10 as described above, it takes time for the temperature change during the temperature control to appear as a state, and it may vary from vulcanizer to vulcanizer. , If the time delay until a change in this vulcanization state value appears is calculated or measured as a time constant and is predetermined, the energy determined by performing temperature control early for a time corresponding to this time constant is calculated. It can be supplied at the optimum time.

Therefore, in the next step 210, a time constant for temporally varying the determined energy is calculated. This time constant is used to provide a time lag for changing the timing of supplying any heating fluid, and the vulcanization state value of the tire actually changes after the energy supply to the tire 48 is started. It is calculated or measured in advance for each vulcanizer 10 according to the time until.

The TRCs 60 and 61 control the temperature according to the determined energy and time constant, and the vulcanization process from step 106 to step 126 is performed in the same manner as above. As a result, the tire is vulcanized so that the vulcanization state value falls within the allowable range.

It should be noted that the information stored in step 126 may not be stored each time, but sample data for every predetermined time may be stored as information.

As described above, the temperature of the tire is predicted by the FEM analysis, and the vulcanization degree, the vulcanization time and the maximum temperature at each position of the tire obtained from the predicted temperature are vulcanized so as to be within the allowable range. Therefore, it is possible to obtain tires with uniform quality, and even when performing energy control such as heat source control that occurs for each vulcanizer, a time constant such as a time delay is added to control energy. Therefore, the tire can be vulcanized without variations due to the vulcanizer (see solid line ST in FIG. 8). Therefore, it is possible to realize a vulcanizer capable of stably supplying high-quality tires, shorten vulcanization time, and improve productivity. .

When the vulcanization control of the tire by the conventional vulcanizer based on the data of the test vulcanization etc. is set as 100, the heat source control system using the vulcanization reaction rate of this embodiment as the criterion is applied. The comparative values are shown in Table 1 below.

[0057]

[Table 1]

However, the raw tire temperature refers to the temperature of the tire when it is not vulcanized, and the minimum vulcanization degree refers to the vulcanization degree of the portion where the vulcanization degree is the minimum inside the tire.

Further, as shown in FIG. 2, TSC indicates the tire side portion, PLY indicates the ply cord portion, and H indicates
UMP indicates the tire tread shoulder.

As can be seen from Table 1 above, in the prior art example, the vulcanization time was kept constant, so that the degree of vulcanization varied depending on the initial temperature of the green tire. In an example in which only the vulcanization degree is controlled, variations in the vulcanization degree and the maximum temperature are reduced, but the vulcanization time varies and cannot be shortened. On the other hand, in the present embodiment, variations in vulcanization degree and maximum temperature are reduced, vulcanization time is further shortened, productivity can be improved, and variations in tire quality obtained are reduced.

In the above embodiment, the energy for vulcanization to be supplied to the tire is set according to the predetermined vulcanization temperature and vulcanization time. However, the energy for vulcanization may be controlled by changing only the vulcanization temperature. You may

Further, in the above embodiment, the example of the tire was described as the material to be vulcanized, but the present invention is not limited to the tire, and vulcanization control is performed when vulcanizing rubber or plastic. Sometimes it can be easily applied.

[0063]

As described above, according to the present invention, the energy of the next material to be vulcanized is estimated and vulcanized from the fluctuation tendency of energy when vulcanizing a plurality of materials to be vulcanized in advance. As a result, it is possible to suppress variations due to aging during the day and night and seasonal variations, it is possible to provide tires with optimum vulcanizing energy and stable quality, and at the same time, there is an effect that productivity is improved. .

[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 block diagram showing a schematic configuration of heat source control during vulcanization.

FIG. 5 is a flowchart showing a flow of vulcanization control in the vulcanizer of the present embodiment.

FIG. 6 is a flowchart showing a flow of initial vulcanization control.

FIG. 7 is a flowchart showing a flow of main vulcanization control.

FIG. 8 is a diagram showing a change in vulcanization time depending on the season when a tire is vulcanized.

[Explanation of symbols]

 10 Vulcanizer 48 Tire 70 Control Device 82 External Storage Device

Claims (4)

[Claims] 1. The temperature of a plurality of positions inside a material to be vulcanized is estimated, the position which is the latest vulcanization point is determined from the estimated temperature, the vulcanization degree of the latest vulcanization point is calculated, and the calculation is performed. Energy required to reach a predetermined degree of vulcanization based on the degree of vulcanization, vulcanizing the material to be vulcanized based on the obtained energy for a plurality of materials to be vulcanized, the plurality of Obtain the energy fluctuation tendency between the materials to be vulcanized, predict the energy when vulcanizing the next material to be vulcanized so that the energy fluctuation tendency falls within a predetermined range, and use the predicted energy. A vulcanization control method for controlling the vulcanization of the next material to be vulcanized based on the following. 2. When the energy supplied to the material to be vulcanized next to be vulcanized based on the predicted energy is changed, it is changed at a faster time by a predetermined time. The vulcanization control method described in 1. 3. A vulcanization degree at a plurality of positions of a material to be vulcanized to be vulcanized at least next based on the predicted energy,
The vulcanization control method according to claim 1, wherein the energy supplied to the material to be vulcanized is controlled so that the maximum temperature and the vulcanization time do not exceed predetermined values. 4. When varying the energy supplied to a vulcanized material to be subsequently vulcanized based on the predicted energy, controlling the energy so that the vulcanization time is minimum and the variation is small. The vulcanization control method according to claim 1, which is characterized in that.