JP2010076454A - Vulcanization-molding method, and vulcanizer therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To heat a heating and pressurizing medium of nitrogen gas at a high heat exchange rate, without requiring high running cost, and size enlargement. <P>SOLUTION: A vulcanization-molding method or the like includes a mold means such as a lower side mold 5 and an upper side mold 25 for storing attachably and detachably a green tire 4, a medium storage means such as a preheating heater 64 for preheating the heating and pressurizing medium such as the nitrogen gas for vulcanization-molding the green tire 4 while storing it suppliably to the green tire 4, by heating the green tire 4 while pressing it onto the mold means, a hot-heat and cold-heat separating means such as a vortex tube 71 for taking out a high temperature component of the heating and pressurizing medium, using pressure energy of the heating and pressurizing medium exhausted after the vulcanization-molding, and a heat exchanger 72 for heating the heating and pressurizing medium replenished to the medium storage means, by heat exchange with the high temperature component. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

  Conventionally, for example, in a bladder type vulcanizer, after loading a raw tire into a mold by clamping a mold, high temperature and high pressure nitrogen gas is supplied into the bladder inserted into the tire hole to extend the bladder. Close to the inner wall of the tire. The raw tire is heated at the vulcanization temperature through the bladder by heating the nitrogen gas with a heater disposed in the stirring path while stirring the nitrogen gas in the raw tire (in the bladder) with a stirring mechanism. While pressing in the mold direction, vulcanization molding is performed (see, for example, Patent Document 1).

JP-A-7-329066

  By the way, in order to raise the temperature of the nitrogen gas to the vulcanization temperature in a short time, the stirred nitrogen gas is supplied to the heater at a high speed so that heat is applied to the nitrogen gas at a high heat exchange rate. It is desirable to make it flow. However, in the configuration in which the nitrogen gas is heated by the heater arranged in the stirring path as in the conventional case, the nitrogen gas reaches the heater after the flow velocity is lowered during the stirring, so that the heat exchange rate is sufficiently high. It is difficult to heat nitrogen gas. Therefore, for example, a method of compensating for the decrease in the flow rate by increasing the flow rate of the nitrogen gas by increasing the stirring capability by the stirring mechanism is conceivable. In this case, however, the running cost for operating the stirring mechanism is increased or large The problem of inviting a change arises. Further, it is conceivable to increase the diameter of the heater or attach fins so as to increase the contact area between the heater and the nitrogen gas, but the heat capacity of the heater increases and a sufficient effect cannot be obtained.

  The present invention has been made in view of the above problems, and its object is to heat a heating and pressurizing medium, which is nitrogen gas, at a high heat exchange rate without causing an increase in running cost and an increase in size. It is to provide a vulcanization molding method and a vulcanizer for the same.

Means and effects for solving the problems

  The vulcanizer of the present invention includes a mold means for detachably storing a raw tire, and a heating and pressurizing medium for vulcanizing and molding the raw tire by pressing the raw tire against the mold means. Medium storage means for preheating while storing the tire in a supplyable manner, and hot / cold heat separation for extracting high temperature components of the heated / pressurized medium using pressure energy of the heated / pressurized medium exhausted after the vulcanization molding And a heat exchanger that heats and heats the heating and pressurizing medium replenished to the medium housing means by the high-temperature component.

  According to the vulcanizer of the present invention, since the high-temperature component of the heated and pressurized medium exhausted after the vulcanization molding can be used for preheating the heated and pressurized medium, the heat utilization efficiency can be improved.

  In the vulcanizer according to the present invention, it is preferable that the medium accommodating means is provided with a heat compressing means for adiabatically compressing the heated and pressurized medium.

  According to the vulcanizer of the present invention, at the time of preliminary heating and at the initial stage of vulcanization molding, the heat-pressurized medium is adiabatically compressed by the adiabatic compression means and heated, so that the temperature of the heat-pressurized medium can be increased more quickly.

  In the vulcanizer according to the present invention, the medium accommodating means is provided upstream of the adiabatic compression means, and the flow rate of the heating and pressurizing medium flowing into the adiabatic compression means is adjusted by adjusting the opening degree. Preferably, a flow rate control means is provided. According to this, since the flow rate control means serves as a throttle, the temperature rise effect by the adiabatic compression means can be made remarkable.

  In the vulcanizer according to the present invention, the opening degree of the flow rate control means and the power of the adiabatic compression means may be adjusted such that the pressure difference between the upstream and downstream of the adiabatic compression means becomes a set differential pressure. preferable. According to this, the flow control means and the adiabatic compression means operate so as to maintain the set differential pressure at the time of preliminary heating and the initial stage of vulcanization molding, so that the heating and pressurizing medium can be quickly heated.

  In the vulcanizer according to the present invention, the flow rate of the heating and pressurizing medium supplied from the raw tire to the medium accommodating means is increased when the temperature in the raw tire reaches a set temperature, and then in the latter half of the vulcanization. The power of the adiabatic compression means is preferably reduced based on a decrease in the flow rate of the heated and pressurized medium supplied from the raw tire to the medium accommodating means. According to this, at the time of vulcanization molding, the power of the adiabatic compression means can be suppressed from being used for useless heating, and the vulcanization time can be shortened and the running cost can be reduced.

  In the vulcanizer according to the present invention, the filling amount of the high-pressure heating / pressurizing medium supplied to the medium accommodating means through the heat exchanger is the pressure of the heating / pressurizing medium flowing through the medium accommodating means. It is preferable to increase or decrease to keep constant. According to this, at the time of vulcanization molding, the filling amount of the high-pressure heating / pressurizing medium supplied to the medium accommodating means can be easily adjusted, and the pressure of the heating / pressurizing medium in the green tire can be stabilized.

  The vulcanization molding method of the present invention preheats a heated and pressurized medium while being accommodated in a medium accommodation mechanism so that the heated and pressurized medium can be supplied to the raw tire, and supplies the preheated heated and pressurized medium to the raw tire. The raw tire is uniformly heated while being pressed against the mold by vulcanizing the raw tire and using the pressure energy of the hot-pressurized medium exhausted after the vulcanization molding The high temperature component is taken out by a hot / cold heat separation mechanism, and the heating and pressurizing medium supplied to the medium accommodation mechanism is heated by exchanging heat with the high temperature component.

  According to the vulcanization molding method of the present invention, the high-temperature component of the heating / pressurizing medium exhausted after the vulcanization molding can be used for preheating the heating / pressurizing medium, so that the heat utilization efficiency can be improved. .

  In the vulcanization molding method of the present invention, the heating and pressurizing medium is circulated by the adiabatic compression mechanism in the medium accommodation mechanism, and the heating and pressurizing medium is set so that the pressure difference between the upstream and downstream of the adiabatic compression mechanism becomes a set differential pressure. It is preferable to increase or decrease the pressure of the pressure medium with a flow rate control mechanism.

  According to the vulcanization molding method of the present invention, the flow control mechanism and the adiabatic compression mechanism operate so as to maintain the set differential pressure, so that the heating and pressurizing medium can be quickly heated.

  In the vulcanization molding method of the present invention, when the temperature in the green tire reaches a set temperature, the flow rate of the heated and pressurized medium supplied from the green tire to the medium accommodation mechanism is increased, and then the latter half of the vulcanization Then, it is preferable to reduce the power of the adiabatic compression mechanism based on a decrease in the flow rate of the heated and pressurized medium supplied from the raw tire to the medium accommodation mechanism. According to this, at the time of vulcanization molding, the power of the adiabatic compression mechanism can be suppressed from being used for useless heating, and the vulcanization time can be shortened and the running cost can be reduced.

  In the vulcanization molding method of the present invention, the filling amount of the high-pressure heat-pressurized medium that is heat-exchanged and replenished to the medium-accommodating mechanism keeps the pressure of the heat-pressurized medium flowing through the medium-accommodating mechanism constant. It is preferable to be increased or decreased. According to this, at the time of vulcanization molding, the filling amount of the high-pressure heating / pressurizing medium supplied to the medium accommodation mechanism can be easily adjusted, and the pressure of the heating / pressurizing medium in the green tire can be stabilized.

It is a schematic block diagram which shows the principal part of the vulcanizer which concerns on 1st Embodiment. It is a top view of a stirring mechanism. It is a perspective view which shows the principal part of a honey aggregate. It is explanatory drawing which shows the flow of the nitrogen gas at the time of vulcanization molding. It is a block diagram of the gas supply device concerning a 1st embodiment. It is a block diagram of the gas supply apparatus which concerns on 2nd Embodiment. It is a differential pressure-flow rate curve of a fan. It is a schematic block diagram which shows the principal part of the vulcanizer which concerns on 3rd Embodiment. (A) (b) is a top view which shows the principal part of a plate. It is a perspective view which shows the principal part of a honey aggregate. It is a perspective view which shows the principal part of a honey aggregate. It is a perspective view which shows the principal part of a honey aggregate. It is a perspective view which shows the principal part of a honey aggregate. It is XX sectional drawing of the honey aggregate in FIG. It is a perspective view which shows the principal part of a honey aggregate. It is a perspective view which shows the principal part of a honey aggregate. It is a longitudinal cross-sectional view in FIG. It is explanatory drawing which shows the flow of the nitrogen gas at the time of vulcanization molding. It is a schematic block diagram which shows the principal part of a vulcanizer. It is a modification of the block diagram of the gas supply device concerning a 1st embodiment. It is a modification of the block diagram of the gas supply apparatus which concerns on 2nd Embodiment.

  A vulcanization molding method and a vulcanizer according to the present invention will be described below with reference to FIGS.

[First Embodiment]
As shown in FIG. 1, the vulcanizer according to the first embodiment of the present invention includes a mold fixing unit 2 set at a predetermined height position, and a mold lifting unit 3 that moves up and down with respect to the mold fixing unit 2. have. The mold lifting / lowering unit 3 is configured to bring the upper side mold 25 in contact with the upper sidewall 4b ′ of the raw tire 4, the split mold 26 positioned in the outer peripheral direction of the tread portion 4a of the raw tire 4, and the upper side mold 25 to a predetermined temperature. And an upper heating mechanism 28 for heating. On the other hand, the mold fixing unit 2 includes a lower side mold 5 that contacts the lower sidewall 4b of the raw tire 4, a lower heating mechanism 9 that heats the lower side mold 5 to a predetermined temperature, a lower heating mechanism 9, and a lower side mold 5. And a base plate (not shown) that supports the center mechanism 10 and the lower heating mechanism 9.

  The central mechanism 10 has a lower ring 12 disposed above the lower side mold 5. The lower ring 12 is formed so as to contact the lower bead portion 4 c of the raw tire 4 and is formed so as to sandwich the lower edge portion of the bladder 20. Further, a gas supply / exhaust passage (not shown) through which nitrogen gas as a heating and pressurizing medium is circulated is formed in the inner peripheral portion of the lower ring 12. As shown in FIG. 5, the gas supply / discharge path is in communication with a gas supply device 50. Details of the gas supply device will be described later.

  In addition, a center post 22 is erected in the center of the lower ring 12 in a vertically slidable and airtight state. An upper ring 19 is provided at the upper end of the center post 22. The upper ring 19 has an upper bladder ring 21, and the upper bladder ring 21 sandwiches the upper edge portion of the bladder 20. On the other hand, a post elevating mechanism (not shown) that can raise and lower the center post 22 to an arbitrary height position is connected to the lower end portion of the center post 22. Then, the post lifting mechanism raises the center post 22 to the upper limit position so that the upper edge of the bladder 20 is lifted and the bladder 20 is set to a diameter smaller than the tire hole of the tire 4 when the vulcanized tire is carried out. On the other hand, at the time of vulcanization molding of the raw tire 4, the center post 22 is lowered so as to expand the bladder 20 to a diameter that can contact the inner wall surface of the raw tire 4.

  The bladder 20 expanded and contracted by the center post 22 presses the inner wall surface of the tire in the molding direction by supplying nitrogen gas during vulcanization molding of the raw tire 4, and is formed of, for example, butyl rubber. . Inside the bladder 20, a stirring mechanism 30 for stirring the nitrogen gas supplied from the gas supply device 50 is provided. Part or all of the stirring mechanism 30 is formed of a ferromagnetic material. Examples of the ferromagnetic material include steel and SUS420. However, the material is not particularly limited as long as it is a material that is electromagnetically heated.

  Specifically, as shown in FIGS. 2 and 3, the stirring mechanism 30 has a plurality of honey members 31 for flowing nitrogen gas. These honey members 31 are formed of a high thermal conductive material such as copper or aluminum. The honey members 31 are annularly arranged at equal intervals along the circumferential direction with the axis of the center post 22 as the center point, and constitute a honey aggregate 32 as a whole.

  The above-described honey aggregate 32 is supported by a honey support member 33. The honeycomb support member 33 is formed of the above-described ferromagnetic material. Moreover, the honey support member 33 has an annular portion 34 that supports the honey member 31, and a rod-like support portion 35 that protrudes from the inner peripheral end of the annular portion 34 toward the center point. The annular portion 34 is formed in an annular disk shape, and supports the center portion of each of the honeycomb members 31 in the height direction. In addition, the connection form of the annular part 34 and the honey member 31 is a form in which a notch part is formed in each of the honey member 31 and the annular part 34, and the two parts are combined by fitting and then joined by welding. Alternatively, the honeycomb member 31 may be prepared in a state of being divided into two, and each divided piece may be joined to the upper surface and the lower surface of the annular portion 34 by welding.

  On the other hand, the rod-like support portions 35 are arranged at equal intervals with a larger pitch than the honeycomb member 31. The rod-like support portion 35 has a tip portion connected to the first cylindrical member 36. As shown in FIG. 1, the first cylindrical member 36 constitutes a part of a honey assembly rotating mechanism 37 that rotates the honey assembly 32 in the circumferential direction. The honeycomb assembly rotating mechanism 37 includes a second cylindrical member 38 that is rotatably extrapolated to the center post 22, the first cylindrical member 36 that is extrapolated to an upper end portion of the second cylindrical member 38, and a first It has a key member 39 and a fastening member 45 that fix the cylindrical member 36 and the second cylindrical member 38, and a rotation drive device 40 that rotationally drives the second cylindrical member 38 at a predetermined rotational speed inside the central mechanism 10. ing. Then, the honey assembly rotating mechanism 37 configured in this way rotates the honey assembly 32 via the second cylindrical member 38 and the first cylindrical member 36 by the rotation driving device 40, and thereby the nitrogen in the bladder 20. The gas is mainly stirred in the circumferential direction, and a secondary flow in the arrow direction is induced in the cross section of FIG.

  As shown in FIG. 1, an induction heating mechanism 41 that preferentially heats the stirring mechanism 30 is provided below the stirring mechanism 30 while being supported by the lower ring 12. The induction heating mechanism 41 includes a coil member 42 disposed to face the honeycomb assembly 32 and the annular portion 34, and a heat insulating member 43 that covers the upper surface of the coil member 42. The coil member 42 is formed in an annular shape centered on the center post 22 and is formed by winding a coil from the inner peripheral side to the outer peripheral side.

  The coil member 42 is connected to a power supply device (not shown) via power cables 44 and 44 at the inner and outer peripheral ends. The power supply device can output a high-frequency current. And the coil member 42 produces | generates an alternating magnetic field by supply of the high frequency current from a power supply device, and carries out the electromagnetic induction heating of the cyclic | annular part 34 with this alternating magnetic field, and thereby the stirring mechanism 30 whole, such as the honey aggregate 32, is heated to high temperature. It comes to heat. Further, the heat insulating member 43 prevents the coil member 42 from being overheated by radiant heat from the stirring mechanism 30.

  As shown in FIG. 5, the vulcanizer configured as described above is supplied with nitrogen gas from a gas supply device 50. The gas supply device 50 includes a low-pressure gas supply system 51 that supplies shaping nitrogen gas, a low-pressure gas exhaust system 52 that exhausts shaping nitrogen gas, and a high-pressure gas that preheats nitrogen gas used during vulcanization molding. Preheating system 53, high pressure gas exhaust system 54 for exhausting nitrogen gas used for vulcanization molding, and nitrogen gas replenished to high pressure gas preheating system 53 using the pressure energy and sensible heat of the exhausted nitrogen gas And a heat recovery system 55 for heating.

  The low-pressure gas supply system 51 includes a gas supply source 61 that supplies low-pressure nitrogen gas, and a first valve 62 that is provided between the gas supply source 61 and the raw tire 4. The first valve 62 can be switched between supply and stop from the gas supply source 61 to the raw tire 4 and is opened during shaping. Further, the low pressure gas exhaust system 52 has a second valve 63 provided between the raw tire 4 and a recovery device (not shown).

  The high-pressure gas preheating system 53 includes a preheating heater 64 and a chamber 65 in series and a blower 66. The preheating heater 64 preheats by heating nitrogen gas. The chamber 65 stores a predetermined amount of nitrogen gas. The blower 66 takes in nitrogen gas from the intake port 66a and discharges it from the exhaust port 66b. The blower 66 is in communication with the chamber 65 on the intake port 66a side, and is connected with the preheating heater 64 on the exhaust port 66b side. Thereby, the high pressure gas preheating system 53 is in a state in which the preheating heater 64, the chamber 65, and the blower 66 are present in the circulation path.

  Further, a third valve 67 is provided between the air inlet 66 a of the blower 66 and the chamber 65. A fourth valve 68 and a fifth valve 69 are connected before and after the third valve 67. The fourth valve 68 is provided between the chamber 65 and the third valve 67 and between the raw tires 4. The fifth valve 69 is provided between the third valve 67 and the blower 66 and between the raw tires 4. The third to fifth valves 67, 68, and 69 are preheated with high pressure gas when the fourth valve 68 and the fifth valve 69 are closed and the third valve 67 is opened during preheating. The system 53 is designed to be a closed circulatory system. Further, at the time of vulcanization molding, the high pressure gas preheating system 53 is opened to the raw tire 4 by opening the fourth valve 68 and the fifth valve 69 and closing the third valve 67. It has become.

  The high pressure gas exhaust system 54 is connected to a gas recovery device (not shown) via a heat recovery system 55. The high pressure gas exhaust system 54 includes a sixth valve 70 provided between the raw tire 4 and the heat recovery system 55. The sixth valve 70 is configured to discharge the nitrogen gas in the raw tire 4 through the heat recovery system 55 by being opened when the vulcanization molding is completed.

  The heat recovery system 55 into which nitrogen gas flows from the high-pressure gas exhaust system 54 as exhaust gas includes a vortex tube 71 that separates exhaust gas (nitrogen gas) into hot and cold components, and a high-pressure gas preheating system 53. A heat exchanger 72 that heats the nitrogen gas supplied to the chamber 65 by exchanging heat with a high-temperature component of the exhaust gas. The heat exchanger 72 has a high temperature path 72 a connected to the vortex tube 71 and a low temperature path 72 b connected to the high pressure gas preheating system 53. A seventh valve 73 and an eighth valve 74 are respectively provided before and after the high temperature path 72a (upstream and downstream), and the eighth valve 74 is connected to a gas recovery device (not shown). On the other hand, a ninth valve 75 and a tenth valve 76 connected to the high-pressure gas preheating system 53 are respectively provided before and after the low temperature path 72b. The tenth valve 76 is connected to a gas supply source 77 that supplies high-pressure nitrogen gas. The seventh to tenth valves 73 to 76 are opened when the high pressure nitrogen gas is supplied to the high pressure gas preheating system 53 from the gas supply source 77 while exhausting the nitrogen gas from the raw tire 4 as the exhaust gas. Plugged. It should be noted that the discharge timing and the replenishment timing are not necessarily matched.

  In the above configuration, the vulcanization molding method will be described through the operation of the vulcanizer according to the first embodiment.

  First, as shown in FIG. 1, the mold elevating part 3 is positioned above the mold fixing part 2 by raising the mold elevating part 3. Thereafter, by raising the center post 22 of the center mechanism 10, the upper edge of the bladder 20 is lifted through the upper ring 19, and the bladder 20 is reduced to a diameter smaller than the tire hole of the raw tire 4. Thereafter, the raw tire 4 is transported between the mold fixing part 2 and the mold lifting / lowering part 3 by a transport device (not shown) so that the tire hole of the raw tire 4 is positioned above the center post 22. Then, the raw tire 4 is lowered, and the raw tire 4 is held on the lower side mold 5 while the center post 22 and the bladder 20 are inserted into the tire hole of the raw tire 4.

  Thereafter, as shown in FIG. 5, the first valve 62 of the low-pressure gas supply system 51 is opened, and low-pressure nitrogen gas is supplied from the gas supply source 61 into the bladder 20 (raw tire 4). Then, the bladder 20 is inflated to shape and hold the raw tire 4.

  Next, as shown in FIG. 1, by lowering the mold lifting and lowering portion 3, a cylindrical mold corresponding to the tread portion 4 a of the raw tire 4 is formed, and the upper side mold 25 is formed above and below the mold. Then, the mold is fully closed by bringing the lower side mold 5 into contact therewith. And the mold raising / lowering part 3 and the mold fixing | fixed part 2 are locked with the lock holding mechanism which is not shown in figure, and the mold clamping of a mold is completed.

  When the mold clamping is completed as described above, the first valve 62 of the low-pressure gas supply system 51 is closed as shown in FIG. At this time, the second valve 63 is closed.

  Thereafter, the third valve 67 in the high-pressure gas preheating system 53 is closed, while the fourth valve 68 and the fifth valve 69 are opened, and the ninth valve 75 and the tenth valve 76 are opened. By doing so, the nitrogen gas preheated in the high pressure gas preheating system 53 and the high pressure nitrogen gas from the gas supply source 77 are supplied to the bladder 20.

  In addition, the ninth valve 75 and the tenth valve 76 of the heat recovery system 55 are opened, and high-pressure nitrogen gas flows from the gas supply source 77 into the low-temperature path 72 b of the heat exchanger 72. The high-pressure nitrogen gas is heated by heat exchange with the heat storage body heated to a high temperature by the exhaust gas, and then supplied into the bladder 20. Thereby, since the high temperature component of the nitrogen gas exhausted after the vulcanization molding can be used for preheating the supplemental nitrogen gas, the heat utilization efficiency is improved. Therefore, since the nitrogen gas supplied to the bladder 20 can start heating from the preheating temperature that has approached the vulcanization temperature to some extent, it can be raised to the vulcanization temperature in a short time.

  Further, when nitrogen gas is supplied from the high-pressure gas preheating system 53 to the bladder 20, the stirring mechanism 30 and the induction heating mechanism 41 are operated as shown in FIG. In other words, the stirring mechanism 30 is rotated by the driving force of the rotation driving device 40. As a result, the nitrogen gas is mainly stirred in the circumferential direction, and a secondary flow is induced in the cross section of FIG. 4 so as to be pushed out in the outer circumferential direction which is the tread portion 4a direction by the honey member 31.

  In the induction heating mechanism 41, a high frequency current is passed through the coil member 42. As a result, an alternating magnetic field is generated around the coil member 42. The alternating magnetic field heats the honey support member 33 by electromagnetic induction by generating an eddy current in the honey support member 33 made of a ferromagnetic material of the stirring mechanism 30 by electromagnetic induction. When the honey support member 33 is heated, the heat of the honey support member 33 is rapidly conducted to the honey member 31 having excellent thermal conductivity. As a result, the stirring mechanism 30 is heated preferentially by the induction heating mechanism 41, so that the temperature of the stirring mechanism 30 rises more rapidly than the nitrogen gas at the beginning of vulcanization molding.

  Therefore, when the nitrogen gas is stirred by the stirring mechanism 30, the nitrogen gas and the high-temperature stirring mechanism 30 come into contact with each other at a high speed, whereby heat is applied from the stirring mechanism 30 with high efficiency. As a result, the nitrogen gas is heated up to the vulcanization temperature in a short time by high-efficiency heat exchange because the relative speed is high. And the bladder 20 advances by supply of nitrogen gas, it closely_contact | adheres to the inner wall surface of the raw tire 4, and vulcanization molding of the raw tire 4 is performed by heating while pressing the raw tire 4 in a mold direction.

  When the vulcanization molding is completed, as shown in FIG. 5, the fourth valve 68 and the fifth valve 69 of the high-pressure gas preheating system 53 are closed, and the ninth valve 75, the tenth valve 76, and the third valve 67 are By opening the plug, the high-pressure gas preheating system 53 is closed. Then, by operating the blower 66 and the preheating heater 64, the nitrogen gas is circulated and heated and preheated.

  Further, the sixth valve 70 of the high pressure gas exhaust system 54 is opened, and the valves 73 and 74 of the heat recovery system 55 connected to the high pressure gas exhaust system 54 are opened. The sixth valve 70 is exhausted over a certain period of time without being fully opened. Thereby, the nitrogen gas in the bladder 20 passes through the vortex tube 71 and is separated into a low temperature component and a high temperature component. The low-temperature component nitrogen gas is exhausted as it is, while the high-temperature nitrogen gas passes through the high-temperature path 72a of the heat exchanger 72 and is exhausted after giving heat to the heat storage body in the heat exchanger 72. The heat exchanger 72 is preferably a heat storage heat exchanger provided with a heat storage body, but may be a normal indirect heat exchanger.

[Second Embodiment]
The configuration of the vulcanizer according to the second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment, and the description is abbreviate | omitted. The configuration of the second embodiment is different from that of the first embodiment in FIG. 6 in that a differential pressure gauge DP for measuring the pressure difference between the upstream and downstream of the blower 66 is provided. A pressure gauge P for measuring the pressure of nitrogen gas is provided upstream of the preheating heater 64, and the pressure gauge P controls the opening degree of the tenth valve 76. And a thermometer T for measuring the internal temperature of the bladder 20, and the thermometer T controls the opening degree of the fifth valve 69.

  In the above configuration, the vulcanization molding method will be described through the operation of the vulcanizer according to the second embodiment.

First, the nitrogen gas circulating in the high pressure gas preheating system 53 is regarded as an ideal gas. Then, the following relational expression holds.
(Formula 1) PV = RT
Here, P is pressure, V is volume, T is temperature, and R is gas constant.
If the internal energy of the gas is U and the amount of heat from the outside is Q,
(Formula 2) H = U + PV = U + RT
(Formula 3) dS = dQ / T
It becomes. H is enthalpy and dS is specific entropy.

  In FIG. 6, during preheating, the fourth valve 68 and the fifth valve 69 are closed, and the third valve 67 is opened halfway (throttle). The nitrogen gas is adiabatically compressed by the blower 66, so that the volume is compressed and the pressure is increased while the specific entropy of (Expression 3) is constant, and the temperature is increased by the increase in pressure (see (Expression 1)). ). The nitrogen gas undergoes an equal enthalpy change (see (Equation 2)) at the throttle of the third valve 67 and passes through the third valve 67 with the temperature kept constant. This nitrogen gas is further heated by the blower 66, so that the temperature is raised step by step. It is known that the isoenthalpy changes due to the squeezing phenomenon.

  However, in reality, temperature loss and pressure loss occur. That is, in the blower 66, the pressure does not increase by the volume compression, and the enthalpy changes in the third valve 67 and the temperature decreases. However, by providing a throttle with the third valve 67, the temperature rise effect of the blower 66 becomes significant, and the nitrogen gas is quickly heated and preheated to a temperature close to the vulcanization temperature.

  The pressure difference between the upstream and downstream of the blower 66 is measured by the differential pressure gauge DP, and the opening of the throttle of the third valve 67 is controlled by the differential pressure gauge DP so that this pressure difference becomes the set differential pressure. That is, if the rotation speed of the blower 66 is increased so as to increase the pressure difference if the temperature of the nitrogen gas is low, the differential pressure gauge DP is connected to the blower so that the opening of the third valve 67 is decreased and the temperature of the nitrogen gas is increased. 66 and the third valve 67 are controlled, and conversely, if the temperature of the nitrogen gas increases to a temperature close to the optimum temperature for vulcanization, the rotational speed of the blower 66 is decreased so as to reduce the pressure difference. The differential pressure gauge DP controls the blower 66 and the third valve 67 so that the opening degree is increased to smoothly raise the temperature of the nitrogen gas.

  At the start of vulcanization molding, one of the fourth valve 68 and the fifth valve 69 is in a half-opened open state (throttle), the other is in a fully open open state, and the third valve 67 is in a closed state. As a result, the temperature rise effect of the blower 66 becomes significant. In FIG. 6, the fourth valve 68 is in a fully opened state and the fifth valve 69 is in a half-opened state (throttle), and the differential pressure gauge DP controls the blower 66 and the fifth valve 69. . The fourth valve 68 may be opened halfway (throttle) and the fifth valve 69 may be fully opened. Moreover, the structure which uses both the 4th valve | bulb 68 and the 5th valve | bulb 69 as a diaphragm | throttle may be sufficient.

  The pressure of the nitrogen gas circulating through the high-pressure gas preheating system 53 is measured by a pressure gauge P provided upstream of the preheating heater 64. When the high-pressure nitrogen gas is supplied from the gas supply source 77 to the high-pressure gas preheating system 53 during vulcanization molding, the pressure gauge P controls the replenishment amount of the high-pressure nitrogen gas so that the inside of the high-pressure gas preheating system 53 The pressure in the bladder 20 is kept constant by smoothing the pressure fluctuation. That is, while adjusting the opening degree of the ninth valve 75 and the tenth valve 76 provided upstream and downstream of the heat converter 72, a part of high-pressure nitrogen gas from the tenth valve 76, which is a three-way valve, is exposed to the outside. By evacuating the pressure gauge, the amount of high-pressure nitrogen gas replenished to the high-pressure gas preheating system 53 from the gas supply source 77 at a constant rate is adjusted, and the pressure optimum for vulcanization is kept constant. P controls the ninth valve 75 and the tenth valve 76.

Further, the temperature in the bladder 20 is measured by a thermometer T provided in the bladder 20. During vulcanization molding, the thermometer T controls the opening degree of the fourth valve 68, preferably the fifth valve 69, thereby changing the vulcanization state in the bladder 20. That is, in FIG. 7, in the initial stage of vulcanization molding (step A), the fifth valve 69 is opened halfway (squeezed) so that the nitrogen gas supplied from the bladder 20 to the high-pressure gas preheating system 53 is reduced. The thermometer T controls the fifth valve 69 so as to reduce the temperature loss and rapidly increase the temperature in the bladder 20.
And if nitrogen gas temperature becomes a value near a threshold value (vulcanization temperature upper limit), the thermometer T will control so that it may transfer to the latter stage (step B) of vulcanization molding. Specifically, as the thermometer T gradually opens the fifth valve 69 to increase the flow rate of nitrogen gas supplied to the blower 66, the pressure difference between the upstream and downstream of the blower 66 (the differential pressure gauge DP) By decreasing the value, the temperature rise effect by the adiabatic compression of the blower 66 is weakened. Thereby, the temperature change in the bladder 20 becomes gentle.

The thermometer T controls to shift to the final stage of vulcanization molding (step C), and the flow rate of nitrogen gas supplied to the blower 66 is gradually increased while keeping the pressure difference between the upstream and downstream of the blower 66 constant. The differential pressure gauge DP is controlled to gradually reduce the rotational speed of the blower 66 to a predetermined value. And vulcanization molding is completed.
Since other points are the same as those of the first embodiment, description thereof is omitted.

[Third Embodiment]
The configuration of the vulcanizer according to the third embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment, and the description is abbreviate | omitted. The configuration of the third embodiment is different from the first embodiment in that the diffusing means for diffusing nitrogen gas in the bladder 20 is not the stirring mechanism 30 but a blowing nozzle mechanism 90 as shown in FIG.

  The blowout nozzle mechanism 90 is partially or entirely formed of a ferromagnetic material, and has a structure in which two hollow disk-shaped plates 93 and 94 are stacked as shown in FIGS. ing. The plates 93 and 94 are provided with a plurality of nozzles 95 at equal intervals in the circumferential direction. As shown in FIG. 9A, the nozzle 95 is directed in a direction coinciding with the radial direction, and the blowing direction is an external direction of the plate 93 and is inclined obliquely with an angle with respect to the plane of the plate 93. Further, as shown in FIG. 9B, the nozzle 95 may be directed in a direction inclined by 30 degrees from the direction coinciding with the radial direction. The inclination angle of the nozzle is not limited to 30 degrees and can be set to an arbitrary angle.

  The blowout nozzle mechanism 90 is located at the center of the bladder 20 as shown in FIG. 8, and the nozzles 95 of the upper plates 93 and 94 out of the two stacked plates 93 and 94 are diagonally above and below the lower plates 93 and 94. The nozzle 95 is configured to face obliquely downward. Therefore, the inside of the bladder 20 can be heated uniformly by blowing nitrogen gas evenly from the plurality of nozzles 95 without rotating the diffusion means as in the first embodiment. The upper and lower plates 93 and 94 may be combined with the same type or different types.

  Further, since no rotation mechanism is required as compared with the first embodiment, only gas supply / discharge passages 91 and 92 for circulating nitrogen gas are formed inside the central mechanism 10. The gas supply / discharge passages 91 and 92 are in communication with the gas supply device 50 as shown in FIG. Nitrogen gas is supplied into the plates 93 and 94 from gas supply / discharge passages 91 and 92. The center post 22 is erected at the center of the lower ring 12.

  Below the blowing nozzle mechanism 90, an induction heating mechanism (not shown) for preferentially heating the blowing nozzle mechanism 90 is provided in a state supported by the lower ring 12. The induction heating mechanism heats the plates 93 and 94 electromagnetically, thereby heating the entire blowing nozzle mechanism 90 to a high temperature.

  In the above configuration, the vulcanization molding method will be described through the operation of the vulcanizer according to the third embodiment.

After the raw tire 4 is held on the lower side mold 5, nitrogen gas is supplied from the high pressure gas preheating system 53 through the gas supply / discharge passages 91 and 92. At this time, the blowing nozzle mechanism 90 is heated more rapidly than the nitrogen gas by an induction heating mechanism (not shown). Therefore, when the nitrogen gas is blown out by the blowing nozzle mechanism 90, the nitrogen gas and the high-temperature blowing nozzle mechanism 90 come into contact with each other at a high speed, whereby heat is applied from the blowing nozzle mechanism 90 with high efficiency. As a result, the nitrogen gas is heated up to the vulcanization temperature in a short time by high-efficiency heat exchange because the relative speed is high. And the bladder 20 advances by supply of nitrogen gas, it closely_contact | adheres to the inner wall surface of the raw tire 4, and vulcanization molding of the raw tire 4 is performed by heating while pressing the raw tire 4 in a mold direction.
Since other points are the same as those of the first embodiment, description thereof is omitted.

  As described above, the vulcanization molding method of the first to third embodiments diffuses the heating and pressurizing medium such as nitrogen gas by the diffusing means such as the stirring mechanism 30 and the blowing nozzle mechanism 90, and the amount of heat of the diffusing means itself. The raw tire 4 is vulcanized and molded by heating the hot-pressurized medium and heating it uniformly while pressing the raw tire 4 against the mold with the hot-pressurized medium. The diffusion means such as the stirring mechanism 30 and the blowing nozzle mechanism 90 of the first to third embodiments can be heated by at least one heating mode of electromagnetic induction heating, heater heating, and lamp heating. By selecting and combining various heating modes, the temperature of the diffusing unit can be raised by an optimum heating method according to the structure of the diffusing unit itself and the configuration of peripheral devices.

  In addition, the vulcanizer in the first to third embodiments is a lower side mold that detachably accommodates the raw tire 4 as shown in FIG. 1 or 8 in order to enable the vulcanization molding method described above. 5 and diffusion mechanism for diffusing a heating and pressurizing medium such as nitrogen gas for vulcanizing the raw tire 4 by heating the raw tire 4 while pressing it against the mold mechanism. And an induction heating mechanism (heating means) for preferentially heating the diffusing means.

  According to the above configuration, the diffusion means that diffuses the heating and pressurizing medium such as nitrogen gas is preferentially heated by the induction heating mechanism, so that the diffusion means is heated and pressurized at the initial stage of the vulcanization molding. The temperature rises more rapidly. Therefore, when the heating / pressurizing medium is diffused by the diffusing unit, the heating / pressurizing medium and the high-temperature diffusing unit are brought into contact with each other at a high speed, whereby heat is applied from the diffusing unit with high efficiency. As a result, heat exchange with high efficiency is achieved because the contact speed is faster than in the conventional case where heating is performed by flowing the heating / pressurizing medium through a heater arranged in the stirring path of the heating / pressurizing medium. The temperature of the heated and pressurized medium can be raised to the vulcanization temperature in a short time. Thereby, the raw tire 4 heated with a heating and pressurizing medium can be vulcanized and molded in a short time.

  In the first to third embodiments, the case where the present invention is applied to a vulcanizer that employs a bladder system using the bladder 20 is described. However, the present invention is not limited to this, and a bladderless system that does not use the bladder 20 is used. It may be employed in other vulcanizers. In addition, although the description has been given using the split mold method in which a plurality of mold parts are combined and clamped as a mold mechanism, the mold mechanism is not limited to this, but a two-piece mold method in which the upper mold and the lower mold are clamped. May be. Moreover, in this embodiment, although the case where nitrogen gas was employ | adopted as a heating-pressurization medium was demonstrated, it is not limited to this, Inert gas other than nitrogen gas, air, a vapor | steam, etc. may be sufficient.

  In the first to third embodiments, a part or the whole of the stirring mechanism 30 or the blowing nozzle mechanism 90 which is a diffusing means is formed of a ferromagnetic material such as steel or SUS420. The induction heating mechanism for induction heating is used. Accordingly, the induction heating mechanism heats the ferromagnetic material of the diffusion means by electromagnetic induction heating, so that the diffusion means is directly heated. Thereby, a spreading | diffusion means can be preferentially heated with a simple structure.

  Further, in the first embodiment, the stirring mechanism 30 has a plurality of honey members 31 (which may be any one of a ferromagnetic material and a high thermal conductivity material such as copper and aluminum) that allow the heating and pressurizing medium to flow. The honey assembly 32 provided in the above, a honey assembly rotation mechanism 37 (honey ensemble rotation means) for rotating the honey assembly 32 in the circumferential direction, and the honey member 31 supported in the circumferential direction, and formed of a ferromagnetic material. In addition, it has a structure including a honey support member 33. As a result, the stirring mechanism 30 having a simple structure and high strength can be obtained, and the temperature of the entire honey aggregate 32 can be easily raised by electromagnetic induction heating to the honey support member 33.

  In addition, although the honey member 31 in 1st Embodiment demonstrated the case where high heat conductive materials, such as copper and aluminum, were used, for example, you may be formed with the ferromagnetic material. Moreover, although the stirring mechanism 30 demonstrated the case where the honey aggregate 32 (thermal conductor) and the honey support member 33 (heat generating body) for induction heating were combined, both the honey aggregate 32 and the honey support member 33 were demonstrated. May be formed to have a function as a heating element. As will be described later, the heating element is not limited to heating by electromagnetic induction heating, but may be heating by heater heating or lamp heating.

  Further, as shown in FIG. 10, the stirring mechanism 30 may be formed by fixing the honeycomb member 31 to the upper surface of the honeycomb support member 33 with a fastening member such as a screw or a bolt. In this case, the spring member 31 can be easily replaced.

  Further, as shown in FIG. 11, the stirring mechanism 30 includes a honey aggregate 32 provided with a plurality of honey members 31 for allowing the heating and pressurizing medium to flow, and a honey support member 33 for supporting the honey member 31 in the circumferential direction. The support member 33 has a base material 81 made of a high thermal conductivity material and a ferromagnetic member 82 made of a ferromagnetic material joined to the base material 81 by welding or riveting. May be.

  In addition, as shown in FIG. 12, the stirring mechanism 30 may have a configuration in which a honey support member 33 is provided on the upper surface and the lower surface of the honey aggregate 32. In addition, as shown in FIGS. 13 and 14, the stirring mechanism 30 is formed by spraying a ferromagnetic material on the base member 81, and the base member 81 and the support member 33 are made of a highly heat conductive material. The ferromagnetic material layer 83 may be provided. In this case, the stirring means can be easily obtained even with a complicated shape. Further, as shown in FIG. 15, the stirring mechanism 30 may have slits formed in the honey support member 33 so as to make the temperature distribution by induction heating uniform. In this case, the temperature distribution of the stirring mechanism 30 can be made more uniform, and the amount of input heat can be further increased.

  Moreover, in 1st Embodiment, although the heating mechanism using the induction heating mechanism 41 is demonstrated, it is not limited to this. That is, as shown in FIGS. 16 and 17, the vulcanizer may be configured to include a stirring mechanism 30 in which a sheath heater 84 is embedded in the honeycomb support member 33. Further, as shown in FIG. 18, the vulcanizer may have a configuration including a lamp 85 that radiates heat to the stirring mechanism 30. It is desirable to dispose a reflector 86 below the lamp 85 so as to condense the heat radiation at a desired position of the honeycomb assembly 32.

  Furthermore, in 1st Embodiment, as shown in FIG. 1, although the structure by which the induction heating mechanism 41 was arrange | positioned under the honey aggregate 32 was demonstrated, it is not limited to this. That is, as shown in FIG. 19, a configuration in which the induction heating mechanism 41 is disposed inside the honeycomb assembly 32 may be adopted. Further, the arrangement position of the induction heating mechanism (not shown) of the third embodiment is not limited to the state supported by the lower ring 12.

  Further, the vulcanizer in the first and second embodiments includes a high-pressure gas preheating system 53 including a chamber 65 for preheating while accommodating a heated and pressurized medium such as nitrogen gas so as to be supplied to the raw tire 4. (Medium storage means), a vortex tube 71 for extracting a high-temperature component of the heated and pressurized medium exhausted after the vulcanization molding, and a heated and pressurized medium replenished to the low-pressure gas supply system 51 are replaced with And a heat exchanger 72 that heats the components by exchanging heat. According to this configuration, since the high-temperature component of the heating / pressurizing medium exhausted after vulcanization molding can be used for preheating the heating / pressurizing medium, the heat utilization efficiency can be improved.

  Further, the vulcanizer in the second embodiment adiabatically compresses nitrogen gas with the blower 66 to raise the temperature by increasing the pressure while keeping the specific entropy constant. By changing the isenthalpy, the temperature of the nitrogen gas can be raised stepwise by passing the third valve 67 while keeping the temperature constant and further raising the temperature by the blower 66. Therefore, by providing the throttle with the third valve 67, the temperature rise effect of the blower 66 becomes remarkable, and the nitrogen gas can be quickly heated and preheated to a temperature close to the vulcanization temperature. In addition, even at the start of vulcanization molding, one of the fourth valve 68 and the fifth valve 69 is in a half-opened open state (throttle), and the other is in a fully open open state, so that the temperature rise effect of the blower 66 is increased. Can be made remarkable. In addition, the heater can be reduced in size.

  Moreover, the vulcanizer in 2nd Embodiment is set as the structure which has the differential pressure gauge DP which measures the pressure difference of the upstream of the air blower 66, and downstream. According to this configuration, the differential pressure gauge DP controls the opening degree of the throttle of the third valve 67 and the rotational speed of the blower 66 so that the pressure difference between the upstream and downstream of the blower 66 becomes the set differential pressure. 66 power can be reduced.

  The vulcanizer according to the second embodiment has a pressure gauge P that measures the pressure of nitrogen gas circulating in the high-pressure gas preheating system 53. According to this configuration, when the high pressure nitrogen gas is supplied from the gas supply source 77 to the high pressure gas preheating system 53 at the time of vulcanization molding, the pressure gauge P controls the supply amount of the high pressure nitrogen gas. The pressure fluctuation in the preheating system 53 can be smoothed and the pressure in the bladder 20 can be kept constant.

  Further, the vulcanizer in the second embodiment is configured to have a thermometer T that measures the temperature in the bladder 20. According to this configuration, when the nitrogen gas temperature becomes a value near the threshold (upper vulcanization temperature upper limit), the thermometer T is controlled to gradually open the fifth valve 69, and the differential pressure gauge DP is connected to the blower 66. By controlling the rotational speed to gradually decrease to a predetermined value, the power of the blower 66 can be reduced. Therefore, it is possible to suppress the motive power of the blower 66 from being used for useless heating, and to shorten the vulcanization time and the running cost.

  In the vulcanizer according to the first and second embodiments, as shown in FIG. 20 or FIG. 21, the heat exchanger 72 is arranged inside the high-pressure gas preheating system 53 and is accommodated in the high-pressure gas preheating system 53. The heating / pressurizing medium may be configured to be heated by exchanging heat with a high-temperature component of the exhausted heating / pressurizing medium.

  In the vulcanizer according to the second embodiment, the opening degree of the third valve 67 at the time of preheating is not limited to the configuration controlled by the differential pressure gauge DP, but may be a configuration in which the opening is fixed to a constant value. Moreover, the structure which fixes the opening degree of the 5th valve | bulb 69 at the time of vulcanization molding to a fixed value may be sufficient.

  Further, in the vulcanizer in the second embodiment, the switching timing from Step A to Step B is not limited to the configuration in which the thermometer T controls based on the threshold value of the nitrogen gas temperature, and is a configuration that switches by time. Also good. In addition, the timing at which the rotational speed of the blower 66 is decreased in Step B may be the same as the timing at which the opening degree of the fifth valve 69 is increased, or may be after an arbitrary time has elapsed since the fifth valve 69 is fully opened.

  Note that the vulcanizer in the second embodiment may have a configuration in which a flow meter F is provided upstream of the blower 66 as shown in FIGS. According to this configuration, the set flow rate is provided, and the flow meter F controls the opening degree of the third valve 67 or the fifth valve 69 so that the flow rate becomes the set flow rate based on the measured value, and the measured value of the flow rate is obtained. By controlling the rotation speed of the blower 66 based on this, it can be used instead of the differential pressure gauge DP, and the power of the blower 66 can be reduced.

DESCRIPTION OF SYMBOLS 2 Mold fixing | fixed part 3 Mold raising / lowering part 4 Raw tire 5 Lower side mold 10 Center mechanism 12 Lower ring 19 Upper ring 20 Bladder 30 Stirring mechanism 31 Honey member 32 Honey assembly 33 Honey support member 34 Annular part 35 Rod-like support part 40 Rotation drive Device 41 Induction heating mechanism 42 Coil member 43 Heat insulation member 45 Fastening member 50 Gas supply device 51 Low pressure gas supply system 52 Low pressure gas exhaust system 53 High pressure gas preheating system 54 High pressure gas exhaust system 55 Heat recovery system 71 Vortex tube 72 Heat exchanger 81 Substrate 82 Ferromagnetic member 83 Ferromagnetic material layer 84 Sheath heater 85 Lamp 86 Reflector plate 90 Blow nozzle mechanism 93, 94 Plate 95 Nozzle

Claims (10)

Mold means for detachably storing the raw tire,
Medium accommodating means for preheating while accommodating a heating and pressurizing medium for vulcanizing and molding the raw tire by pressing the raw tire against the mold means;
Hot / cold separation means for taking out high-temperature components of the heating / pressurizing medium using pressure energy of the heating / pressurizing medium exhausted after the vulcanization molding;
A heat exchanger that heats and heats the heating and pressurizing medium replenished to the medium containing means with the high temperature component; and
A vulcanizer characterized by comprising:   2. The vulcanizer according to claim 1, wherein the medium accommodating means is provided with a heat compressing means for adiabatically compressing the heated and pressurized medium.   The medium containing means is provided with a flow rate control means provided upstream of the adiabatic compression means and adjusting the opening degree to increase or decrease the flow rate of the heating and pressurizing medium flowing into the adiabatic compression means. The vulcanizer according to claim 2.   The opening degree of the flow rate control means and the power of the adiabatic compression means are adjusted so that the pressure difference between the upstream and downstream of the adiabatic compression means becomes a set differential pressure. Vulcanizer. The flow rate of the heating and pressurizing medium supplied from the raw tire to the medium accommodation means is increased when the temperature in the raw tire reaches a set temperature,
Thereafter, in the second half of vulcanization, the power of the adiabatic compression means decreases based on a decrease in the flow rate of the heating and pressurizing medium supplied from the raw tire to the medium accommodation means. The vulcanizer according to any one of the above.   The filling amount of the high-pressure heating / pressurizing medium supplied to the medium containing means through the heat exchanger is increased / decreased so as to keep the pressure of the heating / pressurizing medium flowing through the medium containing means constant. The vulcanizer according to any one of claims 1 to 5. Preheating while accommodating the heating and pressurizing medium in the medium accommodating mechanism so that the raw tire can be supplied,
By supplying the preheated heating and pressurizing medium to the green tire and uniformly heating the green tire while pressing the mold, the green tire is vulcanized,
Utilizing the pressure energy of the heating and pressurizing medium exhausted after the vulcanization molding, the high temperature component of the heating and pressurizing medium is taken out by a hot and cold separation mechanism,
A vulcanization molding method characterized in that a heat-pressurized medium supplied to the medium accommodation mechanism is heated by heat exchange with the high-temperature component. Circulating the heated and pressurized medium by the adiabatic compression mechanism in the medium accommodation mechanism;
The vulcanization molding method according to claim 7, wherein the pressure of the heating and pressurizing medium is increased or decreased by a flow rate control mechanism so that a pressure difference between the upstream side and the downstream side of the adiabatic compression mechanism becomes a set differential pressure. If the temperature in the raw tire reaches a set temperature, the flow rate of the heating and pressurizing medium supplied from the raw tire to the medium accommodation mechanism is increased,
Then, in the second half of vulcanization, the power of the adiabatic compression mechanism is reduced based on a decrease in the flow rate of the heating and pressurizing medium supplied from the raw tire to the medium accommodation mechanism. Vulcanization molding method. The amount of filling of the high-pressure heat-pressurized medium that is heat-exchanged and replenished to the medium-accommodating mechanism is increased or decreased so as to keep the pressure of the heat-pressurized medium flowing through the medium-accommodating mechanism constant. Item 10. The vulcanization molding method according to any one of Items 7 to 9.

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