DE102007007450B4 - Method of hot water heating of the interior of vulcanizing presses for car tire manufacturing and device for carrying out this method - Google Patents

Abstract

Method of hot water heating of the interior of a Vulcanisierpresse for car tire production, which may be equipped with a membrane, the supply of low-pressure steam in the interior of the car tire or the membrane, which is arranged horizontally in the Vulkanisierpresse, and possibly the subsequent supply of high-pressure steam heating and heating and pressurizing the interior of the car tire or membrane by supplying hot pressurized water and after completion of the vulcanization cycle comprises expelling the hot water from the interior of the car tire or the membrane, characterized in that after completion of the vulcanization cycle, the hot water exits the interior of the car tire or the membrane is driven by the action of high-pressure steam on the surface of the hot water from top to bottom, wherein the high-pressure steam in the upper region of the interior of the vulcanizing or the Diaphragm is supplied.

Description

The technical subject area

The invention relates to the method of hot water heating of the interior of Vulkanisierpressen for car tire manufacturing and an apparatus for carrying out this method. This invention relates to vulcanizing presses both with a membrane and without a membrane.

Previous state of the art

Car tire blanks are vulcanized in vulcanizing presses in which they are molded from the outside by means of a heated metal mold and in the interior of the tire usually an elastic rubber membrane is pressed. In this membrane suitable media are introduced, which heat the tires through the membrane and press from the inside to the car tires, which are formed. It is pressed out of the car tire blanks, the remaining air and thus ensures good flow of rubber adhesive mixture in the cords, which causes the stability of the car tires. However, there are technologies in which no rubber membrane is used and the heat and pressure carriers are fed directly into the interior of the correspondingly attached tire.

In the vulcanization of large tires, such as for trucks, the maximum pressure that can be achieved in the membrane at the given temperature by water vapor is insufficient. In this case, water vapor is used only at the beginning of the vulcanization cycle, to preheat the membrane and the automobile tire. If the car tire is sufficiently heated, the pressure in the diaphragm must be increased to the required value. In this case, hot water is introduced under appropriate pressure into the membrane. In the course of the vulcanization cycle, this water can be exchanged in order to have the possibility of supplying possibly still necessary heat and to be able to obtain the water in the membrane at the required temperature. However, the supplied hot water mixes mostly imperfect with the hot water, which is already in the membrane, and therefore there are temperature differences of the hot water in different locations of the membrane, which is undesirable. At the end of the vulcanization cycle, the hot water is expelled from the membrane by means of steam and the tire is removed from the press.

The publication DE 1 729 839 A discloses a process for vulcanization of pneumatic tires, in which a liquid heating medium is forced out of the bellows space by a gaseous medium under high pressure, this gaseous medium having a temperature level such that the vulcanization continues during the evacuation without interruption or significant changes.

The patent U.S. 4,490,325 discloses a process for vulcanizing pneumatic tires in which the heating and pressurizing of the bladder is improved by supplying the bladder with steam and water successively in multiple stages at different pressures.

According to the prior art, the movements of the individual media in the membrane are as follows:
The membrane is filled with mold steam, heating steam and hot water and then Austreibhochdruckdampf is used to drive off the hot water.

The openings for introducing and discharging the media are located within the membrane in the lower area of the cylinders of the membrane plate, so that it always comes to the exchange of the individual media to their mixing and thus large energy losses occur. Moreover, when switching from the heating steam circuit to the hot water filling circuit, large pressure surges occur.

In the process of expelling the hot water from the membrane by means of steam, the whole water content is heated by more than 30 to 40 ° C, which is a considerable waste of energy.

The essence of the patent

The disadvantages of the previous methods for heating the interiors of Vulkanisierpressen, the interior of which can be equipped with a membrane, with the method of hot water heating of the interior of a Vulkanisierpresse for car tire manufacturing according to this invention, the supply of low-pressure steam and the subsequent supply of the high-pressure steam in the Interior of the press to the car tire, which is arranged horizontally in the Vulkanisierpresse, and the heating and pressurizing of the tire interior by supplying the hot pressurized water, and after the completion of Vulcanisierungszyklus expelling the hot water from the tire interior, is the essence in that, after the end of the vulcanization cycle, the hot water from the tire interior is expelled from the top to the bottom with high-pressure steam due to its action on the mirror surface of the hot water, wherein the High-pressure steam is supplied to the upper region of the interior of the Vulkanisierpresse eliminated.

In the hot water heating method of the interior of automobile tire vulcanizing presses of this invention, two separate circuits of the hot water at two different temperatures are used, with higher temperature hot water being supplied first for heating and pressurizing, followed by lower temperature hot water supplied with the hot water pressure water is supplied to the lower part of the interior of the vulcanized car tire, and the hot water with higher temperature drives without substantial mixing upwards, this is discharged from the upper part of the interior of the vulcanized car tire until the interior of the Car tire is completely filled with hot water pressure lower temperature, the hot water pressure at lower temperature is not circulated in the interior of the car tire, or it is circulated by circulation, which circulate de hot pressure water is discharged from the upper part of the interior of the car tire and is supplied to the lower part of the interior of the vulcanized car tire. The lower temperature hot water may have a temperature of 130 to 180 ° C, and the higher temperature hot water may have a temperature of 160 to 220 ° C.

In another method of hot water heating of the interior of the Vulkanisierpressen for car tire manufacturing according to this invention, only a circle of hot water pressure is used, where the heating and the pressurization with hot water pressure of only one temperature, which is fed into the lower part and through the Circulation is circulated, wherein the circulating hot water pressure is discharged from the upper part of the interior of the car tire and is supplied to the lower part of the interior of the vulcanized car tire.

In both of these methods, the uniform distribution of hot water temperatures in the press optionally equipped with the membrane is achieved by fresh hot water circulating spirally from bottom to top through the membrane and fed into the membrane via tangentially oriented inlet ports and via likewise tangentially oriented openings is removed. For both methods, it is advantageous if the circulation of the hot pressurized water in the interior of the vulcanized car tire by using an internal circulation circuit in the press, which includes a circulation pump takes place.

According to an advantageous embodiment, the supply of the heating high-pressure steam is stopped after 3 to 120 seconds after the beginning of the supply of the hot pressurized water into the interior of the Vulkanisierpresse depending on the size of the vulcanized car tire.

The patent also relates to an apparatus for carrying out the above-mentioned method, which consists of a system of means for supplying, discharging and controlling heating media into the interior of the vulcanised automobile tire or into the membrane which separates the media from the inside of the vulcanised automobile tire. this system of devices comprises a supply line for the supply of the low-pressure steam, a line for the supply of high-pressure steam, lines for supply and discharge of the hot water at different temperatures, to improve the hot water circulation in the membrane, the lines which open into the membrane , may have tangentially oriented openings, a conduit for free water drain and evacuation line comprises, all lines are equipped with actuators. The essence of the device is that the inlet of the line for high pressure steam for expelling the hot pressurized water after the completion of vulcanization from the interior of the vulcanized car tire or from the membrane in the upper part of said interior of the vulcanized car tire or the membrane is arranged and the outlet the circulation line of the hot pressurized water from the interior of the vulcanized car tire or from the membrane is also arranged in the upper part of said interior of the vulcanized car tire or the membrane.

It is advantageous if the inlets and outlets of the media are tangentially oriented into and out of the membrane so as to cause vertically oriented spiral circulation.

According to an advantageous embodiment, the circulation line is provided as an internal circulation circuit which is equipped with a circulatory pump and an actuator.

The essence of the apparatus for carrying out the method of hot water heating of the interior of vulcanizing presses for car tire making, in which two hot pressured water circuits of different temperatures are used, is that the inlet of the lower pressure hot water water pipe in the lower part of the Interior of the vulcanized tire or the diaphragm is arranged and the outlet of the conduit for discharging the expelled by this hot water pressure of higher temperature in the upper part of the interior of the vulcanized car tire or the membrane is arranged.

According to an advantageous embodiment, the inlet of the line for high-pressure steam for expelling the hot pressurized water after the completion of the vulcanization from the interior of the car tire or from the membrane, which is arranged in the upper part of said interior of the vulcanized car tire or the membrane, at the same time also the inlet for the heating steam.

• 1. Der Formdampf wird in den Innenraum des vulkanisierten Autoreifens von unten zugeführt.
• 2. Der Hochdruckbeheizungsdampf wird in den Innenraum des vulkanisierten Autoreifens von oben zugeführt. Einleitung des Hochdruckheißdampfes wird bei der Vulkanisierung von Autoreifen für Personenkraftwagen nach etwa 10 bis 20 Sekunden nach Öffnung des Heißdruckwasserkreises für die Zirkulation gestoppt, und deshalb kommt es zu keinem Druckabfall in der Membrane. Die Membrane wird kontinuierlich bis zum Enddruck gefüllt.
• 3. Heißdruckwasser zur Zirkulation wird von unten zugeführt, wobei es auch tangential zugeführt werden kann. Anschließend wird die spiralförmige Zirkulation des Heißdruckwassers in der Membrane hervorgerufen.
• 4. Der Austreibhochdruckdampf zum Austreiben des Heißwassers nach der Beendigung des Vulkanisierungsprozesses wird von oben eingelassen.

The essence of the method of heating the interior of a Vulkanisierpresse, which is optionally equipped with a membrane, with only one hot water pressure, lies in the following steps:

• 1. The mold steam is fed into the interior of the vulcanized car tire from below.
• 2. The high-pressure heating steam is supplied into the interior of the vulcanized automobile tire from above. Introduction of high-pressure hot steam is stopped in the vulcanization of car tires for passenger cars after about 10 to 20 seconds after opening of the hot water pressure circuit for the circulation, and therefore there is no pressure drop in the diaphragm. The membrane is filled continuously to the final pressure.
• 3. Hot water for circulation is supplied from below, where it can also be supplied tangentially. Subsequently, the spiral circulation of hot water pressure in the membrane is caused.
• 4. The Austreibhochdruckdampf for expelling the hot water after the completion of the vulcanization process is taken from above.

After the circulation of the hot water, the hot water is expelled by means of steam according to the principle of expulsion from top to bottom.

Finally, the membrane is placed in a pressureless state and withdrawn by means of vacuum.

The timing of individual operations depends on the type of car tire being processed.

• 1. Der Formdampf wird in den Innenraum des vulkanisierten Autoreifens von unten zugeführt.
• 2. Der Hochdruckbeheizungsdampf wird in den Innenraum des vulkanisierten Autoreifens von oben zugeführt. Zuführung des Hochdruckheißdampfes wird bei der Vulkanisierung von Autoreifen für Personenkraftwagen nach etwa 10 bis 20 Sekunden nach Öffnung des Heißdruckwasserkreises mit der höheren Temperatur (160 bis 220°C) gestoppt, deshalb kommt es zu keinem Druckabfall in der Membrane. Die Membrane wird kontinuierlich bis zum Enddruck gefüllt.
• 3. Heißdruckwasser mit der höheren Temperatur wird von unten zugeführt, bis die Membrane voll gefüllt ist. In dieser Phase des Prozesses wird keine Zwangszirkulation realisiert.
• 4. Heißdruckwasser mit der niedrigeren Temperatur (130 bis 180°C) zur Zirkulation wird von unten zugeführt, und mit ihrem Druck wird das Heißwasser mit der höheren Temperatur nach oben gedrückt, von wo es dann in einen Wasserspeicher für Heißwasser mit der höheren Temperatur über eine Auslassöffnung im oberen Teil der Membrane ausgetrieben wird. Bei dieser Methode des Austreibens des Heißwassers mit höherer Temperatur durch Wirkung des Heißdruckwassers mit der niedrigeren Temperatur kommt es zu keiner wesentlichen Vermischung von beiden Heißwässern mit verschiedenen Temperaturen. Anschließend wird die Zirkulation des Heißdruckwassers mit der niedrigeren Temperatur erfolgen. Falls der Heißwassereinlass tangential realisiert ist, tritt eine spiralförmige Zirkulation des Heißdruckwassers mit der niedrigeren Temperatur ein.
• 5. Der Austreibhochdruckdampf zum Austreiben des Heißwassers nach der Beendigung der Vulkanisierung wird von oben eingelassen. Nach der erfolgten spiraligen Zirkulation des Heißwassers mit der niedrigeren Temperatur wird dieses Heißwasser mit Hilfe von Dampf nach dem Prinzip der Austreibung von oben nach unten ausgetrieben.

The essence of the method of heating the interior of a Vulkanisierpresse with two separate hot water pressure water at two different temperatures (160 to 220 ° C and 130 to 180 ° C) lies in the following steps:

• 1. The mold steam is fed into the interior of the vulcanized car tire from below.
• 2. The high-pressure heating steam is supplied into the interior of the vulcanized automobile tire from above. Supply of high-pressure hot steam is stopped in the vulcanization of car tires for passenger cars after about 10 to 20 seconds after opening the hot water pressure circuit with the higher temperature (160 to 220 ° C), therefore, there is no pressure drop in the membrane. The membrane is filled continuously to the final pressure.
• 3. Hot water at the higher temperature is supplied from below until the membrane is full. In this phase of the process, no forced circulation is realized.
• 4. Hot water pressure water of lower temperature (130 to 180 ° C) is supplied from below, and with their pressure, the hot water with the higher temperature is pushed up, from where it then into a water reservoir for hot water with the higher temperature over an outlet opening is expelled in the upper part of the membrane. In this method of driving the hot water at a higher temperature by the action of the hot water pressure water at the lower temperature, there is no significant mixing of both hot water at different temperatures. Subsequently, the circulation of the hot water at the lower temperature will take place. If the hot water inlet is realized tangentially, a spiral circulation of the hot pressurized water with the lower temperature occurs.
• 5. The Austreibhochdruckdampf to expel the hot water after the completion of vulcanization is taken from above. After the successful spiral circulation of hot water with the lower temperature of this hot water is expelled by means of steam according to the principle of expulsion from top to bottom.

Finally, the membrane is brought to a pressureless state and withdrawn by means of vacuum.

The timing of individual operations depends on the type of car tire being processed.

As a result of the said principle of expulsion of the hot water by high-pressure steam from top to bottom, there is an enormous energy savings and also for better and more accurate maintenance of temperature in a technological sense. Further, this device can also be operated individually by means of a control valve in the return flows of the higher pressure hot water system or the hot pressurized water circulation system.

Both methods mentioned of heating the interior of a Vulkanisierpresse with a hot water pressure circuit or two Separate hot water pressure circuits with two different temperatures can be supplemented by incorporating an internal circulation pump with an internal circulation circuit that replaces the external circulation circuit.

Using the internal circulation pump for the membrane, one would avoid temperature layer separation in the higher temperature static hot water system in the two separate hot water pressurized water system with two different temperatures. With the internal circulation pump, the cost compared to the usual hot water circulation systems is also greatly reduced and thereby the manufacturing costs as well as the operating costs are substantially reduced.

Overview of the figures in the drawings

In the accompanying drawings, the arrangements of equipped with actuators supply and discharge lines with media for heating the interior of the membrane of a Vulkanisierpresse for car tire manufacturing are shown schematically.

1 shows the arrangement for supply and discharge of the heating media in and out of the membrane according to the prior art.

2 to 6 show various possibilities of arrangement for supply and discharge of the heating media in and out of the membrane according to this invention.

Examples of the embodiment of the invention

example 1

The device after 2 consists of the membrane (M) (the schematic representation of the membrane (M) does not represent their real spatial position) of a Vulkanisierpresse equipped with a system of tubes and openings for feeding the media into the membrane (M) and discharge of the media this is equipped, with the line ( 1 ) for feeding the mold steam, line ( 2 ) for supplying the heating steam, line ( 3 ) for filling the membrane (M) with hot water at the temperature of 190 ° C, line ( 10 ) for the outer circuit of the hot pressurized water circulating through the membrane, line ( 6 ) for discharge of the hot pressurized water, line ( 8th ) for free discharge of superfluous water from the membrane (M), and line ( 9 ) for evacuating the membrane (M) after completion of the vulcanization cycle, the individual lines being equipped with actuators (V1), (V2), (V3), (V6), (V8), (V9) and (V10).

In rubber technology, the tire is molded and heated during vulcanization in a press. The required molding pressure on the tire from its outside is exerted by the mold and from its inside by an elastic membrane filled with a medium of the necessary pressure and temperature, or the medium itself acts on the inside walls of the product. After the membrane (M) with form steam from the line ( 1 ) and then with high-pressure steam from the line ( 2 ) is filled, the membrane (M) through the lower opening with hot water at the temperature of 190 ° C from the line ( 3 ). As the hot water pressure through the membrane dissipates the heat to the tires, the water is cooled down and it may be necessary to replace it in the membrane with warmer hot water. In addition, it is desirable to circulate the hot water pressure in the membrane. This is done with the circulation of hot water over the pipe ( 10 ) and supplying the hot pressurized water with the temperature of 190 ° C from a water reservoir in the membrane (M) via the line ( 3 ), which is equipped with the actuator (V3) achieved, with the hot water between the membrane and the hot water storage via the line ( 10 ) circulates. The hot water can also be fed tangentially into the membrane and can also be removed tangentially from the membrane. Characterized a spiral circulation is caused in the membrane, which ensures a homogeneous distribution of the hot water temperatures in the membrane. At the end of the vulcanization cycle, the high pressure steam is removed from the line ( 2 ) is fed at a temperature of 207 ° C and a pressure of 18 bar in the upper part of the interior of the membrane (M) and the hot water is from the membrane (M) with the steam acting on the surface, via the line ( 6 ), which is equipped with the actuator (V6), expelled into the hot water tank. In this process, there is no mixing of the warmer steam with the cooler hot water in the membrane. During the expulsion of the hot water from the membrane (M), only a small amount of the vapor which is in contact with the water on the surface will condense and the hot water from the membrane (M) can not exceed the required temperature of 190 ° C overheated. After closing the actuator (V2) for the supply of high-pressure steam in the membrane (M) via the line ( 2 ) and before the removal of the tire from the press, the steam and possible water residues from the membrane into the pipe ( 8th ), which is equipped with the actuator (V8) and in which the pressure is close to the atmospheric pressure, drained. Then you can still lower the pressure in the membrane by placing it on the line ( 9 ), which is equipped with the actuator (V9) and in which a negative pressure is connected.

The duration of the individual operations of the vulcanization cycle, as with the previous method of vulcanization, depends on the size of the processed car tire and properties of the materials used.

With a capacity of the membrane (M) of 260 L, with a one-minute expulsion of the hot water at a temperature of 190 ° C by steam according to this invention over the previously used method 17 MJ of heat is spared. As a result, the steam consumption in the expulsion of the hot water from the membrane (M) is lower than in the previous method of hot water expelling and the expelled hot water is not heated undesirable. With the introduction of the spiral circulation of the hot water in the membrane, the originally required hot water flow rate through the membrane is reduced to half and thus achieved further cost savings.

Example 2

The device after 5 and the method by which the invention is carried out differs from the apparatus and method according to Example 1 only in that the circulation of the hot water in the membrane, also the spiral, by means of a small pump (P1) with an actuator ( V11), which in the inner circulation line ( 11 ) of the vulcanizing press, and the circulation line ( 10 ) with the actuator (V10). The course of heating and pressurizing the membranes of the vulcanizing press described in Example 1 remains unchanged. In this case too, vertical spiral circulation can be used if the hot pressurized water is supplied and discharged into the interior of the vulcanized automobile tire or the membrane via tangentially arranged inlets and outlets.

With a capacity of the membrane (M) of 260 L in a one-minute expulsion of the hot water with the temperature of 190 ° C by steam according to this invention over the previously used method of heating the membrane (M) of a Vulkanisierpresse 17 MJ of heat spared. As a result, the steam consumption in the expulsion of the hot water from the membrane (M) is lower than in the previous method of hot water expelling and the expelled hot water is not heated undesirable.

In addition, because no line ( 10 ) is necessary for the circulation of hot water pressure between the membrane and the water reservoir for this water as in Example 1, the total investment costs lowered and there are no heat losses from the surface of this line and no operating costs for hot water transport.

Example 3

The device after 3 consists of the membrane (M) of the vulcanizing press, internally equipped with a system of tubes and openings for feeding the media into the membrane (M) and discharging the media therefrom, with ducting ( 1 ) for the supply of the molding steam, line ( 2 ) for the supply of the heating steam and the steam for expelling the hot water from the membrane (M), line ( 3 ) for the filling of the membrane (M) with hot water at the temperature of 190 ° C, line ( 4 ) for the filling of the membrane (M) with hot water at the temperature of 150 ° C and its circulation through the membrane (M), line ( 5 ) for expelling the hot water with the temperature of 190 ° C from the membrane (M), line ( 10 ) for the external circuit of hot water at the temperature of 150 ° C circulating through the membrane, line ( 6 ) for discharge of the hot pressurized water from the membrane (M) after the completion of the vulcanization cycle, line ( 8th ) for free drainage of water and pipe ( 9 ) for evacuating the membrane (M), wherein the individual lines with actuators (V1), (V2), (V3), (V4), (V5), (V6), (V8), (V9) and (V10) are equipped.

The feeds and discharges of the media into and out of the membrane may be tangentially oriented to create a vertically oriented spiral circulation in the membrane.

The device after 3 and the method by which the invention is carried out differs from the apparatus and the method according to Example 1 in that after filling the membrane (M) with hot water at the temperature of 190 ° C from the line ( 3 ), which is equipped with the actuator (V3), and after the partial heating of the car tire, begins to hot water at the temperature of 150 ° C from the line ( 4 ), which is equipped with the actuator (V4), feed into the membrane (M) via lower openings and the warmer water (190 ° C) from the membrane (M) via the upper opening and the line ( 5 ), which is equipped with the actuator (V5), expel into the storage for hot water with the temperature of 190 ° C until the entire capacity is expelled from the membrane. There is virtually no mixing of the supplied hot water at 150 ° C with the warmer pressurized water (190 ° C), which is expelled, since the difference between the densities of the two waters is significant, and therefore the hot water pressure in the memory with the temperature of 190 ° C is not unnecessary with the supplied cooled colder water. Then, the actuator (V10) is opened and the hot water pressure at 150 ° C is over the line ( 10 ) circulate in the reservoir of the water at 150 ° C, because in the membrane (M) from this memory still hot water at 150 ° C via the line ( 4 ), which is equipped with the actuator (V4), is supplied to hold in the membrane the required water temperature.

At the end of the vulcanization cycle, the high-pressure steam at the temperature of 207 ° C is released from the line ( 2 ), which is equipped with the actuator (V2), fed into the upper part of the interior of the membrane (M) and the hot water is discharged from the membrane with the steam acting on its surface via the line ( 6 ), which is equipped with the actuator (V6), expelled into the hot water tank. In this process, there is no mixing of the warmer steam with the colder water in the membrane (M). During the expulsion of the hot water from the membrane (M), only a small amount of the vapor, which is in contact with the water on its surface, will condense and the hot water from the membrane (M) can not exceed the required temperature of 150 ° C to be heated. The further process is identical to the process in Example 1.

With a capacity of the membrane (M) of 260 L, with a one-minute expulsion of the hot water with the temperature of 150 ° C by steam according to this invention compared to the previously used method 58 MJ heat is spared. As a result, the steam consumption in the expulsion of the hot water from the membrane (M) is lower than in the previous method of hot water expelling and the expelled hot water is not heated undesirable.

In addition, by supplying the hot water at a temperature of 150 ° C through the lower opening in the 260 L membrane, which has been previously filled with water at a temperature of 190 ° C, and the discharge of this warmer water from the membrane (M) over the top opening, avoiding the mixing of these two waters, saves 18 MJ. This heat would otherwise have to be supplied to the 172 ° C water expelled from the membrane (M) so that it could be heated to the required 190 ° C in the hot water tank.

On the other hand, if the said mixing of the two hot-pressure waters were not avoided, the water temperature in the membrane would have risen to 167.5 ° C. after the completion of the filling of the membrane with the 150 ° C. hot water. At the end of the vulcanization cycle and after expulsion of the water by steam in the store of 150 ° C hot water would have to cool this water to 150 ° C. That would be another heat loss of 18 MJ.

Example 4

The device after 4 and the method by which the invention is carried out are the same as in Example 3, but to open and close the line ( 5 ), which is equipped with the actuator (V5), via which the water is expelled from the membrane (M) of the Vulkanisierpresse over the upper opening in the memory of the hot water at the temperature of 190 ° C, an electromagnetically controllable valve as an actuator ( V5). To open and close the line ( 10 ), through which the hot-pressure water at 150 ° C circulates, is used as an actuator (V10) and an electromagnetically controllable valve. By using these two valves one achieves a very fast closing of the lines and thus avoids unwanted mixing the hot-pressure waters with different temperatures.

With a capacity of the membrane (M) of 260 L, with a one-minute expulsion of the hot water with the temperature of 150 ° C with steam from the line ( 2 ), which is equipped with the actuator (V2), saved according to this invention over the previously used method 58 MJ heat. As a result, the steam consumption in the expulsion of the hot water from the membrane (M) is lower than in the previous method of hot water expelling and the expelled hot water is not heated undesirable.

In addition, by supplying the hot water at a temperature of 150 ° C through the lower opening in the 260 L membrane, which has been previously filled with water at a temperature of 190 ° C, and the discharge of this warmer water from the membrane (M) over the top opening, avoiding the mixing of these two waters, saves 18 MJ. Otherwise, this heat would have to be fed to the 172 ° C water expelled from the membrane (M) so that it could be heated to the required 190 ° C in the hot water tank.

On the other hand, if the said mixing of the two hot-pressure waters were not avoided, the water temperature in the membrane would have risen to 167.5 ° C. after the completion of the filling of the membrane with the 150 ° C. hot water. At the end of the vulcanization cycle and after expulsion of the water by steam in the store of 150 ° C hot water would have to cool this water to 150 ° C. That would be another heat loss of 18 MJ.

A further improvement in avoiding the mixing of hot water as it is replaced in the membrane can be achieved by using electromagnetic valves (V5) and (V10) in the hot water lines ( 5 ) and ( 10 ).

Example 5

The device after 6 consists of the membrane (M) of the vulcanizing press, internally equipped with a system of tubes and openings for feeding the media into the membrane (M) and discharging the media therefrom, with the conduit ( 1 ) for the supply of the mold steam, the line ( 2 ) for the supply of the heating steam and the steam for expelling the hot water from the membrane (M), the line ( 3 ) for the filling of the membrane (M) with hot water at the temperature of 190 ° C, the line ( 4 ) for the filling of the membrane (M) with hot water at the temperature of 150 ° C and its circulation through the membrane (M), the line ( 5 ) for expelling the hot water with the temperature of 190 ° C from the membrane (M), the line ( 11 ) for the internal circuit of hot-pressurized water at the temperature of 150 ° C circulating through the membrane by means of a pump (P1), the pipe ( 6 ) for the discharge of the hot pressurized water from the membrane (M) after the completion of the vulcanization cycle, the line ( 8th ) for free drainage of water and piping ( 9 ) for evacuating the membrane (M), wherein the individual lines with actuators (V1), (V2), (V3), (V4), (V5), (V6), (V8), (V9) and (V10) are equipped.

The device after 6 and the method by which the invention is carried out differs from the apparatus and method according to Example 3 in that after filling the membrane (M) with hot water at the temperature of 150 ° C via the line ( 4 ) the actuator (V11) is opened, and by means of the circulation pump (P1) the hot pressurized water is circulated through the membrane (M), causing circulation of the water within the membrane (M), which may also be spiral when the inlet and the outlet of the hot water are tangentially oriented. The pump (P1), the actuator (V11) and the circulation line ( 11 ) are used for internal circulation, and replace the circulation line ( 10 ) with the actuator (V10) used in Example 3 for circulating the water in the membrane (M).

With a capacity of the membrane (M) of 260 L, with a one-minute expulsion of the hot water with the temperature of 150 ° C by steam from the line ( 2 ), which is equipped with the actuator (V2), in the upper part of the membrane (M) according to this invention over the previously used method saves 58 MJ of heat. As a result, the steam consumption in the expulsion of the hot water from the membrane (M) is lower than in the previous method of hot water expelling and the expelled hot water is not heated undesirable.

In addition, by supplying the hot water at a temperature of 150 ° C through the lower opening in the 260 L membrane, which has been previously filled with water at a temperature of 190 ° C, and the discharge of this warmer water from the membrane (M) over the top opening, avoiding the mixing of these two waters, saves 18 MJ. Otherwise, this heat would have to be fed to the 172 ° C water expelled from the membrane (M) so that it could be heated to the required 190 ° C in the hot water tank.

On the other hand, if the said mixing of the two hot-pressure waters were not avoided, the water temperature in the membrane would have risen to 167.5 ° C. after the completion of the filling of the membrane with the 150 ° C. hot water. At the end of the vulcanization cycle and after expulsion of the water by steam in the store of 150 ° C hot water would have to cool this water to 150 ° C. That would be another heat loss of 18 MJ.

A further improvement in avoiding the mixing of hot water as it is replaced in the membrane can be achieved by using electromagnetic valves (V5) and (V10) in the hot water lines ( 5 ) and ( 10 ).

In addition, because no line ( 10 ) is necessary for the circulation of hot water pressure between the membrane and the water reservoir for this water as in Example 1, the total investment costs lowered and there are no heat losses from the surface of this line and no operating costs for hot water transport.

Claims (12)

Method of hot water heating of the interior of a Vulcanisierpresse for car tire production, which may be equipped with a membrane, the supply of low-pressure steam in the interior of the car tire or the membrane, which is arranged horizontally in the Vulkanisierpresse, and possibly the subsequent supply of high-pressure steam heating and heating and pressurizing the interior of the car tire or the diaphragm Supply of hot water pressure and after the completion of the vulcanization cycle, the expulsion of the hot water from the interior of the car tire or the membrane comprises, characterized in that after the completion of the vulcanization cycle, the hot water from the interior of the car tire or the membrane by the action of high-pressure steam on the surface of the Hot water is driven from top to bottom, wherein the high-pressure steam is supplied to the upper region of the interior of the Vulkanisierpresse or the membrane. Method of hot water heating of the interior of a Vulkanisierpresse for car tire production, which may be equipped with a membrane according to claim 1, characterized in that for heating and pressurizing first hot water pressure is supplied to a higher temperature, and then supplied hot water pressure water at a lower temperature with the lower temperature hot water pressure being supplied to the lower portion of the interior of the vulcanized automobile tire or membrane, driving the higher temperature hot water upwardly without substantial mixing, and the latter from the upper portion of the interior of the vulcanized automobile tire or membrane is discharged until the interior of the car tire or the membrane is completely filled with the hot water pressure water at a lower temperature, and the hot water pressure water at lower temperature in the interior of the car tire is not forcibly circulated or by circulatory is circulated, wherein the circulating hot water pressure is discharged from the upper part of the interior of the car tire or the membrane and is supplied to the lower part of the interior of the vulcanized car tire or the membrane. Method of hot water heating of the interior of a Vulkanisierpresse for car tire production, which may be equipped with a membrane, according to claim 1, characterized in that the heating and the pressurization with the hot water pressure of only one temperature, which is supplied to the lower part and is circulated through the circulation takes place, wherein the circulating hot pressure water is discharged from the upper part of the interior of the car tire or the membrane and is supplied into the lower part of the interior of the vulcanized tire or the membrane. Method of hot water heating of the interior of a Vulkanisierpresse for car tire production, which may be equipped with a membrane, according to claim 2 or 3, characterized in that the circulation of the hot pressurized water in the interior of the vulcanized car tire or the membrane by using an internal circulation circuit in the press, the Circulation pump comprises, takes place. Method of hot water heating the interior of a Vulkanisierpresse for car tire production, which may be equipped with a membrane according to claim 1, characterized in that the supply of the heating high pressure steam after 3 to 120 seconds from the beginning of the supply of hot water into the interior of the vulcanizing or membrane is stopped. Method of hot water heating the interior of a Vulcanisierpresse for car tire manufacturing according to claim 2, characterized in that the hot water pressure water at a lower temperature of 130 to 180 ° C, and the hot water pressure at a higher temperature has a temperature of 160 to 220 ° C. Method of hot water heating of the interior of Vulkanisierpressen for car tire production according to any one of claims 1, 2, 3, 4 or 6, characterized in that the hot pressurized water is fed into the interior of the Vulkanisierpresse or the membrane through tangentially arranged inlets and outlets and discharged to a to cause vertically oriented circulation of the liquid in the interior of the vulcanizing press or the membrane. Apparatus for carrying out the method according to claims 1 to 7, consisting of a system of means for supplying, discharging and controlling heating media into the interior of the vulcanised car tire or the membrane which separates the media from the inside of the vulcanised car tire This system of devices comprises a supply line for the supply of low pressure steam, a line for the supply of high pressure steam, lines for the supply and discharge of hot water at different temperatures, a line for free water drainage and an evacuation line, all lines with actuators equipped, characterized in that the inlet of the conduit ( 2 ) is arranged for high pressure steam for expelling the hot pressurized water after the completion of vulcanization from the interior of the vulcanized car tire or from the membrane (M) in the upper part of said interior of the vulcanized car tire or the membrane and the outlet of the circulation line ( 10 . 11 ) is arranged for hot water pressure from the interior of the vulcanized car tire or the membrane also in the upper part of said interior of the vulcanized car tire or the membrane. Apparatus according to claim 8, characterized in that the circulation line ( 11 ) is provided as an internal circulation circuit, which is equipped with a circulation pump (P11) and an actuator (V11). Apparatus according to claim 8, characterized in that the inlet of the conduit ( 4 ) is arranged for hotter pressure water at lower temperature in the lower part of the interior of the vulcanized car tire or the diaphragm (M) and the outlet of the conduit ( 5 ) is arranged for discharging the expelled by this hot water pressure of higher temperature in the upper part of the interior of the vulcanized car tire or the membrane. Apparatus according to claim 8, characterized in that the inlet of the conduit ( 2 ) for high-pressure steam for expelling the hot-pressure water after the completion of vulcanization from the interior of the car tire or the diaphragm (M) disposed in the upper part of said inner space of the vulcanized car tire or the diaphragm, is also the inlet for the heating steam at the same time. Device according to one of the preceding claims, characterized in that the inlets and outlets for the hot pressurized water into and out of the interior of the vulcanized tire or membrane (M) are tangentially oriented so as to provide a vertically oriented spiral circulation in the interior of the vulcanised car tire or tires to cause the membrane.

Images