JP3964421B2 - Gas vulcanizer for tire vulcanizer - Google Patents

Description

  The present invention relates to a gas cycle device for a tire vulcanizer.

The tire vulcanizer includes upper and lower molds and a bladder that expands and contracts by supplying and discharging heated gas (steam, etc.), and a bladder that is expanded by supplying steam to the inner surface of the raw tire set inside the mold. Configured to press.
In this case, a gas cycle device is known in which heated gas is circulated in the bladder in order to eliminate the temperature difference in the bladder (see Patent Document 1).

  As shown in FIG. 6, the gas cycle apparatus includes a bladder 1 that expands and contracts by supplying and discharging heated gas, a forward conduit 2 a connected to the supply port 10 of the bladder 1, and a return connected to the discharge port 11 of the bladder 1. A circulation line 2 in communication with the line 2b, a gas feed device 21 (pump) and a gate valve 20 provided in the circulation line 2, a gas supply line 3 connected to the circulation line 2, and a gas discharge A pipe 4 is provided.

  Then, with the gas supply valve 30 and the gas discharge valve 40 opened and the gate valve 20 closed, the heated gas is supplied from the gas supply line 3 to fill the bladder 1 with the heated gas, and then the gas is supplied. The valve 30 and the gas discharge valve 40 are closed, the gate valve 20 is opened, and the heated gas is circulated in the circulation line 2 and the bladder 1 by the gas feeding device 21 in this state.

However, in such a conventional gas cycle device, the heated gas drain liquefied by heat exchange in the bladder 1 or cooling in the circulation line 2 flows in the circulation line 2.
As described above, when the drain of the heated gas flows through the circulation pipe 2, an excessive load is applied to the gas feeding device 21, and it becomes difficult to increase the circulation flow rate of the heated gas.
As a result, there was a problem that the temperature difference elimination capability in the bladder 1 was reduced, the tire vulcanization time was prolonged, and the tire production capability was reduced.
JP-A-62-33611

  In the present applicant, there is provided a gas-liquid separation part in the circulation pipe, and by collecting drain in the gas-liquid separation part, a tire vulcanizer that prevents the drain from flowing through the circulation pipe is provided. A gas cycle apparatus has already been proposed as a prior art (Japanese Patent Application No. 2003-121435).

  In this prior art, since drain can be accumulated in the gas-liquid separation part, there is an advantage that the drain can be prevented from flowing through the circulation pipe, but a structure in which the gas-liquid separation part is provided in the circulation pipe is necessary. Therefore, the problem that the structure of the circulation pipeline becomes complicated correspondingly.

The present invention has been made in order to solve the above-described conventional problems. Rather than providing a gas-liquid separator in the circulation line, the drain is accumulated inside the circulation line, and this drain is a gas. Do not flow into the blower as a feeding device.
Thus, the circulation flow rate of the heating gas is increased so that an excessive load due to the drain is not applied to the gas feeding device of the gas cycle device.
Accordingly, it is a first object to provide a gas cycle device of a tire vulcanizer that can improve the temperature difference elimination capability in the bladder, shorten the tire vulcanization time, and increase the tire production capacity. .

  In addition, a gas cycle device for a tire vulcanizer that can simplify the piping structure of the gas supply pipe and the gas discharge pipe with respect to the circulation pipe and can simplify the arrangement of the blower and the gate valve is provided. This is the second issue.

  In addition, a third object of the present invention is to provide a gas cycle device for a tire vulcanizer that can reheat the heated gas by utilizing the heat generated by the drive motor of the blower and at the same time cool (water-cool) the drive motor. It is an issue.

In order to solve the first problem, a gas cycle device of a tire vulcanizer according to the present invention (Claim 1)
A bladder that expands and contracts by supplying and discharging heated gas;
A circulation line in which an outgoing line connected to the supply port of the bladder and a return line connected to the discharge port of the bladder are communicated;
A gas feeder and a gate valve provided in the circulation line;
In the gas cycle device of a tire vulcanizer, comprising a gas supply line and a gas discharge line connected to the circulation line,
The gas feeding device is formed in a blower in which an impeller is provided inside a casing in which an air inlet is formed in a central portion and an air outlet is formed in an outer peripheral tangential direction, and the air inlet of the casing faces downward. Arranged to open,
In order to prevent the drain in the circulation pipe from flowing into the casing, the circulation pipe connected to the downward intake port is piped so as to be positioned below the casing.

In order to solve the second problem, a gas cycle device of a tire vulcanizer according to the present invention (Claim 2)
In the gas cycle device of the tire vulcanizer according to claim 1,
A first flow path in which an inflow connection port for the return line and a discharge connection port for a gas discharge line are formed, and a second flow path in which an outflow connection port for the forward line and a supply connection port for a gas supply line are formed. The pipe has a pipe manifold formed inside the block body,
A blower is disposed in a state in which a downward intake port of the casing communicates with the first flow path,
The gate valve is disposed in a state where a valve inlet is connected to the exhaust port of the casing and a valve outlet is communicated with the second flow path.

In order to solve the third problem, a gas cycle device of a tire vulcanizer according to the present invention (Claim 3)
In the gas cycle device of the tire vulcanizer according to claim 2,
By inserting the motor shaft of the blower into the downward intake port of the casing, the drive motor is disposed in the pipe manifold below the downward intake port,
In addition, the heating fluid in the first flow path is introduced to the drive motor side, and heat is exchanged between the heat of the heating fluid in the first flow path and the heat generation of the drive motor.

In the present invention (Claim 1), since the intake port formed in the casing of the blower is opened downward and the circulation pipe connected to the downward intake port is located below the casing, the circulation pipe It is possible to prevent the drain in the passage from flowing into the casing of the blower.
In this way, since the drain does not flow into the casing of the blower, an excessive load due to the drain is not applied to the blower, and conventionally, the energy consumed to circulate the drain is used for circulation of only the heating gas. And the circulating flow rate of the heated gas can be increased.
Thereby, the temperature difference elimination capability in the bladder can be improved, the tire vulcanization time can be shortened, and the tire production capability can be increased.

  Also, since the drain can be stored inside the circulation line, unlike the prior art in which a gas-liquid separation part is provided in the circulation line, the gas-liquid separation part becomes unnecessary, and the structure of the circulation line can be simplified. it can.

In addition, in this invention, since the gas feeder was formed in the air blower which provided the impeller in the inside of a casing, it can prevent that a pulsation arises in gas feed.
Accordingly, no pressure change occurs in the bladder, and the basic condition of tire vulcanization in which the bladder is pressed against the inner surface of the green tire at a constant pressure can be satisfied.

Since the present invention (Claim 2) uses a piping manifold in which a flow path is formed inside the block body, the piping structure of the gas supply pipe and the gas discharge pipe with respect to the circulation pipe is simplified.
Further, since the blower and the gate valve are arranged on the piping manifold, the arrangement structure of the blower and the gate valve is simplified.
Thereby, the whole structure of a gas cycle apparatus can be comprised compactly.

  The present invention (Claim 3) is a configuration in which the heating fluid in the first flow path is introduced to the drive motor side, and the heat of the heating fluid in the first flow path and the heat generation of the drive motor are heat-exchanged. The heating gas can be reheated using the heat generated by the drive motor of the blower, and at the same time, the drive motor can be cooled (water cooled).

Embodiments of the present invention will be described below with reference to the examples shown in the drawings. In addition, the specific structure of this invention is not limited to a following example.
FIG. 1 is an explanatory plan view showing a gas cycle apparatus of a first embodiment corresponding to the gas cycle apparatus according to claim 1 of the present invention, and FIG. 2 is an explanatory view taken along arrow AA of FIG.

  The tire vulcanizer includes upper and lower molds (not shown) and a bladder 1 that expands and contracts by supplying and discharging heated gas, and heated gas (such as high-temperature and high-pressure steam) on the inner surface of the raw tire set inside the mold. By pressing the bladder 1 expanded by the supply of vulcanized, vulcanization molding is performed while holding the green tire.

A circulation line 2 is connected to the bladder 1.
The circulation line 2 is a communication between an outgoing line 2a connected to the supply port 10 of the bladder 1 and a return line 2b connected to the discharge port 11 of the bladder 1, and a blower 5 serving as a gas feeding device. And a gate valve 6 is provided.

  A gas supply line 3 having a gas supply valve 30 is connected to the forward line 2a, and a gas discharge line 4 having a gas discharge valve 40 is connected to the return line 2b. .

  The blower 5 has a substantially circular plane shape, an intake port 51 is formed in the center portion, and an impeller 53 is provided inside a casing 50 in which an exhaust port 52 is formed in the outer peripheral tangential direction. By being rotated by the drive motor 54, the gas sucked from the intake port 51 is continuously discharged from the exhaust port 52. Thus, since the impeller 53 is rotated, pulsation does not occur in the gas feed.

  This blower is not shown as a heat and pressure resistant measure against heated gas (high-temperature high-pressure steam etc.), but a drive-side permanent magnet is attached to the rotating shaft of the impeller, and a driving motor for rotating the rotating shaft. A drive-side permanent magnet is attached to the drive shaft, the drive-side permanent magnet and the driven-side permanent magnet are opposed to each other in a non-contact state via a non-magnetic material, and the rotation shaft side and the drive shaft side are partitioned by the non-magnetic material. It is preferable to use a blower that uses a magnet system or a can motor in which a rotor and a stator of a motor are separated by a case.

  The gate valve 6 communicates with a valve inlet 61 formed on the side surface of the valve box 60 and a valve outlet 62 formed on the bottom surface of the valve box 60 and moves the valve body 64 up and down by a solenoid 63 (or an air cylinder or the like). Thus, the valve inlet 61 and the valve outlet 62 are formed as a piston valve for communicating / closing.

The blower 5 is arranged so that an intake port 51 formed in the casing 50 is opened downward, and the return pipe 2b of the circulation conduit 2 is connected to the downward intake port 51 so that the casing 50 is connected to the casing 50. The formed exhaust port 52 is connected to the valve inlet 61 of the gate valve 6, the forward outlet 2a of the circulation line 2 is connected to the valve outlet 62 of the gate valve 6, and the return line 2b of the circulation line 2 is connected. In addition, piping is performed so that the outgoing pipeline 2 a is positioned below the casing 50.
In this case, the forward pipe 2 a of the circulation pipe 2 may be connected to the downward intake port 51, and the return pipe 2 b of the circulation pipe 2 may be connected to the valve outlet 62 of the gate valve 6.

  Accordingly, when the gas supply valve 30 and the gas discharge valve 40 are opened while the raw tire is set inside the mold and the gate valve 6 is closed, the heated gas is supplied from the gas supply line 3. The gas supply valve 30 and the gas discharge valve 40 are closed in a state where the inside of the bladder 1 is filled with the heating gas.

After filling the inside of the bladder 1 with the heating gas as described above, the gate valve 6 is opened, the circulation line 2 is opened, and a circulation closed circuit is formed between the circulation line 2 and the inside of the bladder 1. Let it form.
In this state, the blower 5 is operated to circulate the heated gas between the circulation line 2 and the inside of the bladder 1, and the temperature difference in the bladder 1 can be eliminated by circulating the heated gas.

At this time, a part of the circulating heated gas is liquefied and drained by heat exchange in the bladder 1 or cooling in the circulation pipe 2.
In this case, even if the heated gas containing drain flows in the circulation pipe 2, the intake port 51 formed in the casing 50 of the blower 5 is opened downward to return the return pipe 2 b and the forward pipe of the circulation pipe 2. Since the passage 2a is piped so as to be positioned below the casing 50, the drain in the circulation conduit 2 does not flow into the casing 50 of the blower 5, and an excessive load due to the drain is applied to the blower 5. There is nothing.

Then, as described above, the raw tire is vulcanized while circulating the heated gas.
After this vulcanization molding is completed, the gate valve 6 and the gas discharge valve 40 are opened, the gas supply valve 30 is closed, and the blower 21 is operated. Thereby, the inside of the bladder 1 and the circulation pipe The heated gas filled in 2 can be discharged from the gas discharge line 4 and at the same time, the drain can be discharged.

  Next, FIG. 3 is an explanatory plan view showing a gas cycle apparatus of a second embodiment corresponding to the gas cycle apparatus according to claim 2 of the present invention, and FIG. 4 is an explanatory view taken along the line BB of FIG.

This gas cycle apparatus has a configuration using a pipe manifold 7.
The pipe manifold 7 is formed by forming a first flow path 70 and a second flow path 71 in the block body 7a. The blower 5 and the gate valve 6 are provided in the pipe manifold 7, and the exhaust port of the blower 5 is provided. 52 is connected to the valve inlet 61 of the gate valve 6.

  The first flow path 70 is formed with an inflow connection port 70 a for the return line 2 b and a discharge connection port 70 b for the gas discharge line 4. The first flow path 70 has a downward direction formed in the casing 50 of the blower 5 in the middle of the first flow path 70. The intake port 51 is communicated with the first communication hole 70c.

  The second flow path 71 is formed with an outflow connection port 71 a for the forward pipe line 2 a and a supply connection port 71 b for the gas supply line 3, and the valve outlet 62 of the gate valve 6 is provided in the middle of the second flow path 71. The two communication holes 71c allow communication.

  Accordingly, when the heated gas is supplied from the gas supply line 3 with the gas supply valve 30 and the gas discharge valve 40 opened and the gate valve 20 closed, the bladder 1 is passed through the second flow path 71 and the forward line 2a. The heated gas flows into the interior, and the gas supply valve 30 and the gas discharge valve 40 are closed in a state where the interior of the bladder 1 is filled with the heated gas.

  After filling the inside of the bladder 1 with the heated gas and then opening the gate valve 20 and operating the blower 5, the exhaust port 52 of the blower 5 → the valve inlet 61 of the gate valve 6 → the gate valve 6 Heating gas in the order of valve outlet 62 → second flow path 71 → outward pipe line 2a → inside of bladder 1 → return pipe line 2b → first flow path 70 → downward intake port 51 of blower 5 → exhaust port 52 of blower 5 Circulates and the temperature difference in the bladder 1 can be eliminated.

  At this time, in the same manner as in the first embodiment, the intake port 51 formed in the casing 50 of the blower 5 is opened downward, and the piping manifold 7 and the circulation conduit 2 are piped so as to be positioned below the casing 50. Therefore, the drain in the circulation line 2 does not flow into the casing 50 of the blower 5, and an excessive load due to the drain is not applied to the blower 5.

  Next, FIG. 5 is a cross-sectional explanatory view showing a gas cycle device of a third embodiment corresponding to the gas cycle device according to claim 3 of the present invention.

In this gas cycle apparatus, the motor shaft 54 a of the blower 5 is inserted into the downward intake port 51 of the casing 50, so that the drive motor 54 is disposed in the pipe manifold 7 below the downward intake port 51.
In this case, the drive motor 54 is a can motor in which the rotor 54b attached to the motor shaft 54a and the stator 54c are separated by a case 54d, and the inside of the compartment 54e on the rotor 54a side is placed in the first flow path 70. The heating fluid is introduced into the compartment 54e through communication.
Other configurations are the same as those of the second embodiment.

  Thus, since the heating fluid is introduced into the compartment 54e of the drive motor 54, the heat of the heating fluid and the heat generation of the drive motor 54 are heat-exchanged, and the heated gas can be reheated, and at the same time, the drive motor 54 can be cooled (water-cooled).

  In the third embodiment, a can motor having a rotor 54b and a stator 54c separated by a case 54d is used as the drive motor 54, and the inside of the compartment 54e on the rotor side 54b is communicated with the first flow path 70. However, for example, a normal electric motor is used as a drive motor, and a jacket-like channel is formed on the outer periphery of the electric motor, and the jacket-like channel is communicated with the first channel. be able to.

In the present invention, a heating device may be provided in the circulation line.
As this heating device, a steam jacket or an electric heater is used. By heating the heating gas in the circulation line with this heating device, it is possible to prevent a temperature drop and a pressure drop of the heating gas. In addition, the attachment position of this heating apparatus may be anywhere as long as it is in the middle of the circulation pipeline.

It is plane explanatory drawing which shows the gas cycle apparatus of 1st Example corresponding to the gas cycle apparatus of Claim 1 of this invention. It is AA arrow explanatory drawing of FIG. It is plane explanatory drawing which shows the gas cycle apparatus of 2nd Example corresponding to the gas cycle apparatus of Claim 2 of this invention. It is BB arrow explanatory drawing of FIG. It is a section explanatory view showing the gas cycle device of the 3rd example corresponding to the gas cycle device of claim 3 of the present invention. Explanatory drawing which shows the gas cycle apparatus of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bladder 10 Supply port 11 Discharge port 2 Circulation line 2a Outward line 2b Return line 3 Gas supply line 30 Gas supply valve 4 Gas discharge line 40 Gas discharge valve 5 Blower 50 Casing 51 Intake port 52 Exhaust port 53 Blade Car 54 Drive motor 54a Motor shaft 54b Rotor 54c Stator 54d Case 54e Compartment 6 Gate valve 60 Valve box 61 Valve inlet 62 Valve outlet 63 Solenoid 64 Valve body 7a Block body 7 Piping manifold 70 First flow path 70a Inlet connection port 70b Discharge Connection port 70c First communication hole 71 Second flow path 71a Outflow connection port 71b Supply connection port 71c Second communication hole

Claims (3)

A bladder that expands and contracts by supplying and discharging heated gas;
A circulation line in which an outgoing line connected to the supply port of the bladder and a return line connected to the discharge port of the bladder are communicated;
A gas feeder and a gate valve provided in the circulation line;
In the gas cycle device of a tire vulcanizer, comprising a gas supply line and a gas discharge line connected to the circulation line,
The gas feeding device is formed in a blower in which an impeller is provided inside a casing in which an air inlet is formed in a central portion and an air outlet is formed in an outer peripheral tangential direction, and the air inlet of the casing faces downward. Arranged to open,
In order to prevent the drain in the circulation pipe from flowing into the casing, the circulation pipe connected to the downward intake port is piped so as to be positioned below the casing. Gas vulcanizer for tire vulcanizer. In the gas cycle device of the tire vulcanizer according to claim 1,
A first flow path in which an inflow connection port for the return line and a discharge connection port for a gas discharge line are formed, and a second flow path in which an outflow connection port for the forward line and a supply connection port for a gas supply line are formed. The pipe has a pipe manifold formed inside the block body,
A blower is disposed in a state in which a downward intake port of the casing communicates with the first flow path,
A gas cycle device for a tire vulcanizer in which a valve inlet is connected to an exhaust port of the casing and the gate valve is disposed in a state where the valve outlet is in communication with the second flow path. In the gas cycle device of the tire vulcanizer according to claim 2,
By inserting the motor shaft of the blower into the downward intake port of the casing, the drive motor is disposed in the pipe manifold below the downward intake port,
In addition, a gas cycle device for a tire vulcanizer formed so that the heating fluid in the first flow path is introduced to the drive motor side to exchange heat between the heat of the heating fluid in the first flow path and the heat generation of the drive motor.

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