JP5661569B2 - Tire vulcanizer and tire vulcanizing method - Google Patents

Description

  The present invention relates to a tire vulcanizer and a tire vulcanization method for vulcanizing and molding a raw tire.

  In a tire vulcanizer, a raw material is vulcanized by supplying a high-temperature and high-pressure heating / pressurizing medium to the internal space of the green tire accommodated in the mold and pressing the green tire against the inner surface of the mold. Molding. The heating and pressurizing medium supplied to the green tire is preheated by a sheath heater or the like.

  Patent Document 1 discloses a tire vulcanizer that heats a heating and pressurizing medium that circulates through a flow path by electromagnetic induction heating a heating body having a flow path through which the heating and pressurizing medium flows. . Since the heating body is heated to heat the heating / pressurizing medium, the temperature rise of the heating / pressurizing medium can be accelerated.

  Further, in the tire vulcanizer, since the pressure of the heating / pressurizing medium decreases during vulcanization, it is necessary to supply a new high-pressure heating / pressurizing medium to the system through which the heating / pressurizing medium flows. Patent Document 2 discloses a low-temperature high-pressure heating process that is newly supplied to the system during vulcanization with residual heat recovered from a high-temperature low-pressure heating-pressure medium exhausted from the system through which the heating-pressurizing medium flows after vulcanization. A vulcanizer for preheating a pressure medium is disclosed. Heat utilization efficiency can be improved by utilizing the residual heat of the heated and pressurized medium exhausted from the system.

JP 2009-255535 A JP 2010-76454 A

  By the way, the temperature of the heating and pressing medium in the system is lowered by the low-temperature and high-pressure heating and pressing medium newly supplied to the system through which the heating and pressing medium flows. Therefore, the heating and pressurizing medium in the system is reheated during vulcanization, but during that time, the amount of heat given to the green tire is insufficient, and thus the vulcanization time must be lengthened.

  In addition, when the high-temperature and low-pressure heating / pressurizing medium exhausted from the system through which the heating / pressurizing medium flows is nitrogen gas or the like, the constant pressure specific heat becomes small, and the efficiency of heat exchange becomes extremely poor. Therefore, the amount of heat input to the low-temperature and high-pressure heating / pressurizing medium newly supplied to the system at the start of vulcanization is small, and it is difficult to eliminate the temperature drop at the start of vulcanization by heat exchange. Therefore, there is room for improvement in terms of operating efficiency of the tire vulcanizer.

  An object of the present invention is to provide a tire vulcanizer and a tire vulcanization method capable of shortening the vulcanization time and improving the operation efficiency.

The tire vulcanizer according to the present invention communicates with a mold that detachably accommodates a raw tire, and an internal space of the raw tire, and is cut off from the internal space before vulcanization is started, A medium circulation path having a medium circulation path that circulates; and a first heating unit that is provided in the medium circulation path and heats the heating and pressurizing medium that circulates through the medium circulation path to a predetermined temperature before vulcanization is started. A medium supply path connected to the medium distribution path, a supply source for supplying the heating and pressurizing medium having the predetermined pressure to the medium supply path, and the medium supply path. A pair of check valves capable of storing in the medium supply path an amount of the heated and pressurized medium that is equal to or greater than the amount discharged from the medium flow path at the end of vulcanization, and the medium supply Stored in the road And a second heating section for heating the serial heating and pressurizing medium to the predetermined temperature, and in the a pair of check valves is closed before the start vulcanization, at a predetermined pressure to the medium supply path The heating and pressurizing medium having the predetermined temperature is stored, and the pair of check valves are opened immediately after the start of vulcanization, whereby the heating and pressurizing medium stored in the medium supply path is transferred to the medium flow. It is supplied to a route.

  According to said structure, when vulcanization | cure is started, the pressure and temperature of the heating-pressurization medium which distribute | circulate a medium distribution path will fall. On the other hand, in the medium supply path in advance, a predetermined amount of the pressure and temperature maintained at the same pressure and temperature as the heating and pressurizing medium at a predetermined temperature at a predetermined pressure that circulated through the medium distribution path immediately before the start of vulcanization and before the pressure drop. A heating and pressurizing medium is stored. Then, at the timing when the pressure and temperature of the heating and pressurizing medium flowing through the medium distribution path are lowered, the medium pressurizing medium is supplied to the medium distribution path with the predetermined pressure in the medium supply path to the medium distribution path. The pressure of the heating / pressurizing medium flowing through the medium increases, and the temperature of the heating / pressurizing medium flowing through the medium distribution path is prevented from decreasing. Thereby, since the time for reheating the heating and pressurizing medium flowing through the medium distribution path is shortened, the shortage of heat given to the raw tire can be solved at an early stage. Therefore, the vulcanization time can be shortened and the operating efficiency of the tire vulcanizer can be improved. Moreover, since the amount of heat required for reheating can be reduced, energy saving can be achieved.

In the tire vulcanizer according to the present invention, the second heating unit heats the heating and pressurizing medium stored in the medium supply path by the heating and pressurizing medium flowing through the medium circulation path. Also good. According to the above configuration, the heating / pressurizing medium stored in the medium supply path is heated using the heating / pressurizing medium flowing through the medium circulation path while being heated by the first heating unit as the heat source. There is no need to separately provide a heat source for heating the heating and pressurizing medium stored therein and its control means.

Further, the tire vulcanizing method according to the present invention circulates through a medium circulation path that is blocked from the internal space until the start of vulcanization in the medium distribution path that communicates with the internal space of the green tire that is detachably accommodated in the mold. heating the heating and pressurizing medium of a predetermined pressure to a predetermined temperature, by supplying the heating and pressurizing medium of the predetermined pressure from a source to a medium supply line connected to the medium flow path, said at vulcanization ends a step of causing distillate savings said heating and pressurizing medium in an amount equal to or higher than the amount that is discharged from the medium flow path to the medium supply path, said heating and pressurizing medium that is stored in the medium supply path within said predetermined temperature And immediately after the start of vulcanization , and supplying the heated and pressurized medium at the predetermined temperature to the medium flow path at the predetermined pressure stored and heated in the medium supply path. That And butterflies.

  According to said structure, when vulcanization | cure is started, the pressure and temperature of the heating-pressurization medium which distribute | circulate a medium distribution path will fall. On the other hand, in the medium supply path in advance, a predetermined amount of the pressure and temperature maintained at the same pressure and temperature as the heating and pressurizing medium at a predetermined temperature at a predetermined pressure that circulated through the medium distribution path immediately before the start of vulcanization and before the pressure drop. A heating and pressurizing medium is stored. Then, at the timing when the pressure and temperature of the heating and pressurizing medium flowing through the medium distribution path are lowered, the medium pressurizing medium is supplied to the medium distribution path with the predetermined pressure in the medium supply path to the medium distribution path. The pressure of the heating / pressurizing medium flowing through the medium increases, and the temperature of the heating / pressurizing medium flowing through the medium distribution path is prevented from decreasing. Thereby, since the time for reheating the heating and pressurizing medium flowing through the medium distribution path is shortened, the shortage of heat given to the raw tire can be solved at an early stage. Therefore, the vulcanization time can be shortened and the operating efficiency of the tire vulcanizer can be improved. Moreover, since the amount of heat required for reheating can be reduced, energy saving can be achieved.

In the tire vulcanizing method according to the present invention, the heating / pressurizing medium stored in the medium supply path may be heated by the heating / pressurizing medium flowing through the medium circulation path. According to the above configuration, the heating / pressurizing medium stored in the medium supply path is heated using the heating / pressurizing medium flowing through the medium circulation path while being heated as a heat source, and thus stored in the medium supply path. There is no need to separately provide a heat source for heating the heating / pressurizing medium and its control means.

  According to the tire vulcanizer and the tire vulcanization method of the present invention, the time for reheating the heating and pressurizing medium flowing through the medium flow path after vulcanization is started can be shortened, so that the vulcanization time can be shortened. In addition, the operating efficiency of the tire vulcanizer can be improved.

It is a schematic diagram which shows a tire vulcanizer. It is a schematic diagram which shows a tire vulcanizer.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
(Configuration of tire vulcanizer)
As shown in FIG. 1, the tire vulcanizer 1 according to the present embodiment includes a mold 31 that detachably accommodates a raw tire, and a gas or air such as an inert gas for vulcanizing the raw tire, or air thereof. And a medium flow path 20 for flowing a heat-pressurized medium made of a mixed gas at a predetermined pressure. Hereinafter, the predetermined pressure may be referred to as high pressure, and the pressure lower than the predetermined pressure may be referred to as low pressure. The medium circulation path 20 is connected to the medium circulation path 21 for circulating the heated and pressurized medium for preheating, and the medium supply path 22 connected to the medium circulation path 21 to supply the heated and pressurized medium into the internal space of the raw tire. And a medium recovery path 23 that is connected to the medium circulation path 21 and recovers the heated and pressurized medium from the internal space of the raw tire to the medium circulation path 21. In the following description, an example in which nitrogen gas is used as the heating and pressurizing medium will be described (the same applies to other embodiments).

  A stretchable bladder (not shown) made of an elastic material (for example, butyl rubber) is disposed inside the green tire accommodated in the mold 31. A high-temperature and high-pressure nitrogen gas is supplied into the bladder (which is also the interior space of the raw tire), the bladder is extended and brought into close contact with the inner wall surface of the raw tire, and the raw tire is attached to the inner wall surface of the mold 31 through the bladder. To vulcanize the green tire. The present invention can also be applied to a bladderless tire vulcanizer that does not use a bladder.

Further, the tire vulcanizer 1 includes a sheath heater 13 as a heater (first heating unit) provided in the medium circulation path 21 and heating a predetermined pressure of nitrogen gas flowing through the medium circulation path 21 to a predetermined temperature. Yes. Hereinafter, the predetermined temperature may be referred to as high temperature, and the temperature lower than the predetermined temperature may be referred to as low temperature. In the medium circulation path 21, there are a medium circulation device 11 for circulating nitrogen gas, a temperature sensor 12 for measuring the temperature of the nitrogen gas, a sheath heater 13, a medium supply path 22, and a medium recovery path 23. A bypass valve 14 disposed between them is disposed.

  Further, a medium supply valve 15 for partitioning the medium circulation path 21 and the medium supply path 22 is disposed in the medium supply path 22.

  A medium recovery valve 16 for partitioning the medium recovery path 23 and the medium circulation path 21 is disposed in the medium recovery path 23. A discharge path 24 is connected to the medium recovery path 23 between the mold 31 and the medium recovery valve 16. An exhaust valve 17 is disposed in the discharge path 24.

  Here, the medium circulation device 11 is a blower driven by an electric motor, for example, and is inverter-driven so that the gas flow rate can be varied. The medium circulation device 11 circulates the nitrogen gas in the medium circulation path 21 in order to preheat the nitrogen gas. Further, the medium circulation device 11 supplies nitrogen gas to the internal space of the raw tire via the medium supply path 22 and recovers nitrogen gas from the internal space of the raw tire via the medium recovery path 23.

  The temperature sensor 12 is for measuring the temperature of the nitrogen gas in the medium circulation path 21 and is, for example, a thermocouple. The temperature sensor 12 is disposed in the immediate vicinity of the medium supply path 22. Thereby, the medium circulation path 21, the medium supply path 22, and the medium recovery path 23 are in the same system state (the medium supply valve 15 and the medium recovery valve 16 are open and the bypass valve 14 is closed), or In any state where the medium circulation path 21 is in an individual system state (the medium supply valve 15 and the medium recovery valve 16 are closed and the bypass valve 14 is open), The temperature of the supplied nitrogen gas can be measured appropriately.

  The heater that is the first heating unit is for heating the nitrogen gas flowing through the medium circulation path 21, but is not limited to the sheath heater as long as the nitrogen gas is heated to a predetermined temperature required for vulcanization, and electromagnetic induction heating. A heater such as a means, a plate heater, a cartridge heater, a band heater, and a cast-in heater may be used. The greater the temperature difference between the nitrogen gas and the heater, the faster the temperature of the nitrogen gas can be raised.

  The sheath of the sheath heater 13 changes its material when the temperature becomes high. Therefore, the sheath heater 13 is provided with a heater-side temperature sensor 19 that measures the surface temperature of the sheath heater 13.

  The temperature sensor 12, the sheath heater 13, and the heater side temperature sensor 19 are electrically connected to the temperature controller 18. The temperature controller 18 receives a signal from the temperature sensor 12 and issues an appropriate command to the sheath heater 13 so that the nitrogen gas reaches a predetermined temperature. Further, the temperature controller 18 receives a signal from the heater-side temperature sensor 19 and issues an appropriate command to the sheath heater 13 so that the temperature of the sheath of the sheath heater 13 does not exceed the temperature causing the material change. That is, the temperature controller 18 performs ON / OFF control and PID control on the sheath heater 13 so that the temperature of the nitrogen gas is kept at a predetermined temperature and the sheath heater 13 does not change its material.

  Further, the tire vulcanizer 1 has a medium supply path 25 connected to the medium circulation path 21 of the medium distribution path 20. The medium supply path 25 is connected to a medium circulation path 21 between the medium recovery path 23 and the medium circulation apparatus 11 on the upstream side in the direction in which the nitrogen gas flows when viewed from the medium circulation apparatus 11.

  The tire vulcanizer 1 includes a gas supply source (supply source) 41 that supplies low-temperature and high-pressure nitrogen gas to the medium supply path 25, a check valve 42 and a check valve 45 provided in the medium supply path 25, A sheath heater 43 is provided as a heater (second heating unit) for heating the nitrogen gas stored in the medium supply path 25 to a predetermined temperature. In the medium supply path 25, a gas supply source 41, a check valve 42, a sheath heater 43, a safety valve 44, and a check valve 45 are arranged in this order from upstream to downstream.

  The check valve (storage member) 42 and the check valve (storage member) 45 prevent a reverse flow of low-temperature and high-pressure nitrogen gas supplied from the gas supply source 41 to the medium supply path 25, thereby supplying a predetermined amount of nitrogen gas. It is stored in the medium supply path 25. The sheath heater 43 heats and keeps the nitrogen gas supplied from the gas supply source 41 and stored in the medium supply path 25 to a predetermined temperature. The safety valve 44 discharges a part of the nitrogen gas to the outside of the medium supply path 25 when the pressure of the nitrogen gas in the medium supply path 25 exceeds a certain level. Prevent damage. Further, as will be described later, the check valve (supply member) 45 is opened at the timing when the pressure and temperature of the nitrogen gas in the medium flow path 20 are reduced immediately after the start of vulcanization, thereby entering the medium supply path 25. The stored high-temperature and high-pressure (predetermined temperature and predetermined pressure) nitrogen gas is supplied to the medium circulation path 21.

  Here, the pipe capacity (predetermined amount) of the medium supply passage 25 between the check valve 42 and the check valve 45 is equal to or greater than the discharge amount of nitrogen gas discharged from the discharge passage 24 at the end of vulcanization. Designed. A temperature sensor 46 that measures the temperature of nitrogen gas in the medium supply path 25 is provided in the medium supply path 25 between the check valve 42 and the check valve 45. Note that a heater-side temperature sensor similar to the heater-side temperature sensor 19 that measures the surface temperature of the sheath heater 43 may be provided in the sheath heater 43.

  The sheath heater 43 and the temperature sensor 46 are electrically connected to the temperature controller 18. The temperature controller 18 receives a signal from the temperature sensor 46 and issues an appropriate command to the sheath heater 43 so that the nitrogen gas reaches a predetermined temperature. That is, the temperature controller 18 performs ON / OFF control and PID control on the sheath heater 43 so as to raise the temperature of the nitrogen gas to a predetermined temperature and keep the temperature at the predetermined temperature.

(Operation of tire vulcanizer)
Next, the operation of the tire vulcanizer 1 according to this embodiment will be described.

  First, nitrogen gas is preheated in the medium circulation path 21. Here, the medium recovery valve 16 and the medium supply valve 15 are closed, and the bypass valve 14 is opened. In this way, a closed circuit in which nitrogen gas can circulate in the medium circulation path 21 for preheating is formed by opening and closing the valve. Then, high-pressure nitrogen gas from the gas supply source 41 is introduced from the medium supply path 25 to the medium circulation path 21, and the introduced nitrogen gas is circulated through the medium circulation path 21 by the medium circulation device 11. The temperature of the nitrogen gas circulating in the medium circulation path 21 is adjusted to a predetermined temperature by the sheath heater 13 controlled by the temperature controller 18.

  By performing preliminary heating before flowing the nitrogen gas into the medium supply path 22, the rising time for raising the supply temperature of the nitrogen gas supplied to the internal space of the green tire to a predetermined temperature immediately after the start of vulcanization can be shortened. it can.

  In addition, while the temperature of the nitrogen gas circulating in the medium circulation path 21 is adjusted to a predetermined temperature, a predetermined amount of nitrogen gas supplied from the gas supply source 41 is supplied to the check valve 42, the check valve 45, and the like. Is stored at a pressure (predetermined pressure) equivalent to the nitrogen gas in the medium circulation path 21. The nitrogen gas stored in the medium supply path 25 is heated by the sheath heater 43 to a predetermined temperature, that is, a temperature equivalent to the nitrogen gas in the medium circulation path 21.

  On the other hand, the raw tire is set in the mold 31 while inserting the bladder inside the raw tire (not shown). Then, low-pressure nitrogen gas is supplied from a low-pressure medium supply source (not shown) into the bladder to extend the bladder, and when the mold 31 (in the bladder) reaches a predetermined pressure, the raw tire is shaped and held. To do. Then, the mold 31 is fully closed and locked, and the mold clamping of the mold 31 is completed.

  After confirming that the nitrogen gas in the medium circulation path 21 is heated to a predetermined temperature, the nitrogen gas in the medium supply path 25 is heated to a predetermined temperature, and that the mold 31 is clamped, Start sulfur. That is, by closing the bypass valve 14 and opening the medium supply valve 15 and the medium recovery valve 16, high-temperature and high-pressure nitrogen gas is supplied to the internal space of the raw tire through the medium supply path 22. The raw tire is pressed against the inner wall surface of the mold 31 through a bladder and vulcanized by the high-temperature and high-pressure nitrogen gas supplied to the internal space of the raw tire.

  Here, immediately after the start of vulcanization, the nitrogen gas in the internal space of the green tire is discharged to the outside of the mold 31 and returned to the medium circulation path 21 via the medium recovery path 23. At this time, the temperature and pressure of the nitrogen gas in the medium circulation path 21 are lowered by connecting the medium supply path 22, the mold 31, and the medium recovery path 23. That is, the temperature and pressure of the nitrogen gas in the medium flow path 20 are reduced. At this timing, the check valve 45 is opened due to the pressure difference, and the high-temperature and high-pressure nitrogen gas stored in the medium supply path 25 and heated in advance is supplied to the medium circulation path 21.

  Here, between the two check valves 42 and 45 in the medium supply path 25, a nitrogen gas having a capacity equal to or greater than the discharge amount of the nitrogen gas discharged from the discharge path 24 at the end of vulcanization is set to a predetermined pressure and Since the gas was stored at a predetermined temperature, the nitrogen gas supplied from the medium supply path 25 to the medium circulation path 21 increases the pressure of the nitrogen gas flowing through the medium circulation path 20 and the nitrogen flowing through the medium circulation path 20. It is suppressed that the temperature of gas falls. As a result, the time for reheating the nitrogen gas flowing through the medium flow path 20 by the sheath heater 13 is shortened, so that the shortage of heat given to the raw tire is eliminated at an early stage. Thereby, since vulcanization time is shortened, the operating efficiency of the tire vulcanizer 1 is improved. In addition, the amount of heat required for reheating is reduced.

  Thereafter, when the pressure of the nitrogen gas in the medium flow path 20 reaches a specified value, the check valve 45 is closed. Note that the pressure of the nitrogen gas in the medium supply path 25 between the check valve 42 and the check valve 45 decreases until the pressure of the nitrogen gas in the medium flow path 20 reaches a specified value. The gas supply source 41 opens, and low-temperature and high-pressure nitrogen gas is supplied into the medium supply path 25. When the pressure of the nitrogen gas in the medium flow path 20 reaches the specified value, the pressure of the nitrogen gas in the medium supply path 25 between the check valve 42 and the check valve 45 reaches the specified value. 42 closes.

  The high-pressure nitrogen gas in the medium flow path 20 is reheated by the sheath heater 13 to quickly become a desired high-temperature high-pressure nitrogen gas, and is circulated and supplied to the internal space of the raw tire via the medium supply path 22.

  Further, the nitrogen gas in the medium supply path 25 between the check valve 42 and the check valve 45 is heated to a predetermined temperature by the sheath heater 43 during vulcanization. If the pressure increases too much due to the expansion of the nitrogen gas, the safety valve 44 releases a part of the nitrogen gas to the outside of the medium supply path 25.

  When the vulcanization is completed, the bypass valve 14 is opened, and the medium supply valve 15 and the medium recovery valve 16 are closed. Thereby, the nitrogen gas is circulated in the medium circulation path 21 by the medium circulation device 11. Further, the high-temperature and high-pressure nitrogen gas remaining in the medium supply path 22, the mold 31, and the medium recovery path 23 is discharged from the exhaust valve 17 to the atmosphere or recovered by a recovery line. Thereafter, the next green tire is set in the mold 31 and the next vulcanization is performed.

(effect)
As described above, according to the tire vulcanizer 1 according to the present embodiment, when vulcanization is started, the pressure of the high-temperature and high-pressure (predetermined pressure and predetermined temperature) nitrogen gas flowing through the medium flow path 20 and The temperature drops. On the other hand, in the medium supply path 25, there is a predetermined amount of nitrogen gas maintained at a pressure and temperature equivalent to the high-temperature and high-pressure nitrogen gas that has been flowing through the medium flow path 20 immediately before the start of vulcanization and before the pressure drop. Reserved. Then, at the timing when the pressure and temperature of the nitrogen gas flowing through the medium flow path 20 are reduced, the high-temperature and high-pressure nitrogen gas in the medium supply path 25 is supplied to the medium flow path 20 to flow through the medium flow path 20. While the pressure of nitrogen gas rises, it is suppressed that the temperature of nitrogen gas which distribute | circulates the medium distribution path 20 falls. Thereby, since the time for reheating the nitrogen gas flowing through the medium flow path 20 is shortened, the shortage of heat given to the green tire can be resolved at an early stage. Therefore, the vulcanization time can be shortened and the operating efficiency of the tire vulcanizer 1 can be improved. Moreover, since the amount of heat required for reheating can be reduced, energy saving can be achieved.

[Second Embodiment]
(Configuration of tire vulcanizer)
Next, the tire vulcanizer 201 according to the second embodiment of the present invention will be described. In addition, about the same component as the component mentioned above, the same reference number is attached | subjected and the description is abbreviate | omitted. The difference between the tire vulcanizer 201 and the tire vulcanizer 1 of the first embodiment is that, as shown in FIG. 2, the sheath heater 43 that heats the nitrogen gas (heated and pressurized medium) in the medium supply path 25 by heat generation. Instead, it has a heat exchange path 50 that heats the nitrogen gas in the medium supply path 25 by heat exchange with the nitrogen gas in the medium circulation path 21 heated by the first heating unit.

  The heat exchange path (second heating unit) 50 is made of a copper pipe or the like, and as shown in FIG. 2, the forward path 51 branched from the medium circulation path 21 on the downstream side of the medium circulation apparatus 11 and the upstream of the medium circulation apparatus 11. The heat exchange section 53 is provided between the return path 52 connected to the medium circulation path 21 on the side, the forward path 51 and the return path 52, and wound around the medium supply path 25 between the check valve 42 and the safety valve 44. And have.

  A part of the high-temperature and high-pressure nitrogen gas flowing through the medium circulation path 21 flows through the forward path 51, exchanges heat with the nitrogen gas flowing through the medium supply path 25 in the heat exchange unit 53, and then returns to the return path 52. And return to the medium circulation path 21. As described above, the heat of the high-temperature and high-pressure nitrogen gas that circulates through the medium circulation path 20 is used to be stored in the medium supply path 25 so that the temperature is equivalent to the nitrogen gas that circulates through the medium circulation path 21. Since the nitrogen gas is heated, there is no need to separately provide a heat source for heating the nitrogen gas stored in the medium supply path 25 and its control means.

(effect)
As described above, according to the tire vulcanizer 201 according to this embodiment, the nitrogen gas flowing through the medium circulation path 21 while being heated by the first heating unit (sheath heater 13) is used as a heat source in the medium supply path 25. Therefore, there is no need to separately provide a heat source for heating the nitrogen gas stored in the medium supply path 25 and its control means.

(Modification of this embodiment)
The embodiment of the present invention has been described above, but only specific examples are illustrated, and the present invention is not particularly limited, and the specific configuration and the like can be appropriately changed in design. Further, the actions and effects described in the embodiments of the invention only list the most preferable actions and effects resulting from the present invention, and the actions and effects according to the present invention are described in the embodiments of the present invention. It is not limited to what was done.

  For example, although the sheath heater 13 is shown as a configuration for heating the nitrogen gas flowing through the medium circulation path 21, the invention is not limited to this, and an electromagnetic induction heating body that performs electromagnetic induction heating may be used. Further, the sheath heater 43 that heats the nitrogen gas stored in the medium supply path 25 in the first embodiment may also be an electromagnetic induction heating body. When an electromagnetic induction heating body is used, the surface temperature of the electromagnetic induction heating body is measured by a heater-side temperature sensor, and the temperature controller 18 controls the electromagnetic induction so that the temperature of the electromagnetic induction heating body does not exceed the temperature causing the material change. You may control a heating body.

DESCRIPTION OF SYMBOLS 1,201 Tire vulcanizer 11 Medium circulator 12 Temperature sensor 13 Sheath heater 18 Temperature controller 19 Heater side temperature sensor 20 Medium flow path 21 Medium circulation path 22 Medium supply path 23 Medium recovery path 25 Medium supply path 31 Mold 41 Gas supply source 42, 45 Check valve 43 Sheath heater 46 Temperature sensor 50 Heat exchange path

Claims (4)

A mold for detachably storing raw tires;
A medium circulation path having a medium circulation path that communicates with the internal space of the green tire and is interrupted from the internal space before the start of vulcanization and through which a heating and pressurizing medium of a predetermined pressure circulates;
A first heating unit that is provided in the medium circulation path and heats the heating and pressurizing medium flowing through the medium circulation path to a predetermined temperature before the start of vulcanization;
A medium supply path connected to the medium distribution path;
A supply source for supplying the heating and pressurizing medium having the predetermined pressure to the medium supply path;
An amount of the heating and pressurizing medium provided in the medium supply path and supplied into the medium supply path that is equal to or greater than the amount discharged from the medium flow path at the end of vulcanization is placed in the medium supply path. A pair of check valves that can be stored;
A second heating unit that heats the heating and pressurizing medium stored in the medium supply path to the predetermined temperature;
Have
The pair of check valves before start vulcanization that is closed, said at a predetermined pressure said heating and pressurizing medium of a predetermined temperature is stored, the pair of check immediately after the start vulcanization to the medium supply path A tire vulcanizer, wherein the heating and pressurizing medium stored in the medium supply path is supplied to the medium flow path by opening the valve. 2. The tire according to claim 1, wherein the second heating unit heats the heating and pressurizing medium stored in the medium supply path by the heating and pressurizing medium that flows through the medium circulation path. Vulcanizer. The heating and pressurizing medium having a predetermined pressure that flows through the medium circulation path that is blocked from the internal space until the start of vulcanization in the medium distribution path that communicates with the internal space of the green tire that is detachably accommodated in the mold up to a predetermined temperature. Heating, and
The heating and pressurizing medium having the predetermined pressure is supplied from a supply source to a medium supply path connected to the medium distribution path, and the heating is performed in an amount equal to or greater than the amount discharged from the medium distribution path at the end of vulcanization. Storing a pressurized medium in the medium supply path;
Heating the heating and pressurizing medium stored in the medium supply path to the predetermined temperature;
Supplying the heated and pressurized medium at the predetermined temperature to the medium flow path at the predetermined pressure stored and heated in the medium supply path immediately after the start of vulcanization;
A tire vulcanizing method comprising: The tire vulcanizing method according to claim 3, wherein the heating and pressurizing medium stored in the medium supply path is heated by the heating and pressurizing medium flowing through the medium circulation path.

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