KR100513134B1 - Tire vulcanizer - Google Patents

Abstract

The present invention relates to a tire vulcanization device, wherein a heat exchanger (21) and a first electric heating device (22) are connected to a heat medium supply pipe (4) connected to a bladder unit (3) to supply steam and nitrogen gas from the outside. The second electric heating device 24 and the circulation device 25 are installed in the drain pipe 16 for discharging steam and nitrogen gas, and heat-exchange the nitrogen gas through the heat exchanger, followed by the first electric heating device ( 22) by supplying to the bladder unit (3) in a preheated state to a predetermined temperature to facilitate mixing with the steam to uniformize the internal temperature of the bladder unit (3), as well as the second electric heating apparatus (24) and the circulation device (25) to circulate the nitrogen gas into the bladder unit (3) so that the nitrogen gas can be used in parallel with the heat medium and pressure medium to operate the vulcanization device intermittently in the factory of the mass production method I can do it.

Description

Tire vulcanizer

The present invention relates to a device for vulcanizing a tire, and in particular, it is possible to easily mix steam and nitrogen gas, and to configure the nitrogen gas to be used in parallel with a heat medium and a pressure medium to prevent heat loss inside the bladder to reduce the vulcanization time. The present invention relates to a tire vulcanization device that is shortened and can be intermittently operated in a production line of a mass production method.

As is well known, tires made of rubber materials are susceptible to the addition of sulfur or other catalysts, so that when heat and pressure are applied, the bonds between sulfur and rubber molecules in the tire reduce plasticity or increase elasticity and tensile strength over a wide temperature range. As a result, it is possible to exert a function as a tire. Such a heating and pressurizing device is commonly called a vulcanization device.

On the other hand, such a vulcanizing device is generally divided into the internal vulcanizing device 1 and the external vulcanizing device 2, as shown in Figure 1, that is, the internal vulcanizing device 1 is a high elastic rubber material Bladder unit (3) formed of a, and the heat medium supply pipe (4) which is connected to the bladder unit (3) to supply steam from the outside, connected to the bladder unit (3) inert from the outside The high pressure medium supply pipe (5) and the low pressure medium supply pipe (6) for supplying nitrogen gas, which is a gas, and the main recovery pipe connected to the bladder unit (3), similarly to the heat medium supply pipe (4) and the pressure medium supply pipes (5,6) ( 7) and auxiliary collection pipe (14).

The heat medium supply pipe 4 and the pressure medium supply pipes 5 and 6 are installed in parallel with the single vulcanization medium supply pipe 15, and the main return pipe 7 and the auxiliary recovery pipe 14 are also single. It is installed in parallel with the drain pipe 16, and the heat medium supply pipe (4), the pressure medium supply pipe (5, 6), the main recovery pipe (7) and the auxiliary recovery pipe 14, respectively, remotely controllable opening / closing valve (not shown). Is not installed).

In addition, the external vulcanizing device (2) is a mold (8) for determining the outer shape of the tire, and a mold opening and closing device (9) for sealing the mold (8) completely on the mold inner surface of the outer shape of the tire, Attached to the upper platen (壓 盤: 10) and the lower platen (11) and the upper platen (10) for conducting the external heat source to the mold, it is necessary for the tire vulcanization while maintaining the state of being pressed against the lower platen (11) after assembly. It is equipped with a steam jacket 12 and the like, which serves as a medium for conducting heat from the outside of the mold to the outside of the tire to maintain the uniformity of temperature for each mold part.

In addition, drain pipes 17 and 18 are connected to the upper platen 10, the lower platen 11, and the steam jacket 12 via remote control valves (not shown), respectively. Through the 18, the upper platen 10 and the lower platen 11 and the steam jacket 12 can be selectively discharged, and the upper platen 10 and the steam jacket 12, respectively, Separately, steam supply pipes 19 and 20 are connected to supply steam from the outside.

Therefore, when the green tire 13 is introduced into the bladder unit 3 through a tire loading loader (not shown), the width of the bladder unit 3 is matched to the bead position of the inserted green tire 13. Then, the low pressure inert gas is supplied through the low pressure medium supply pipe 6 to expand the bladder so that the introduced green tire 13 is positioned in the bladder unit 3 in place.

In the next step, the mold opening and closing device 9 is operated to close the mold 8 in which the outer shape of the tire is imprinted to be completely sealed, and then steam is supplied from the outside through the heating medium supply pipe 4 to be vulcanized. As the heat is conducted into the green tire, the vulcanization proceeds by these internal vulcanization device 1 and external vulcanization device 2, wherein the green tire 13 is blamed inside the mold 8. The rubber is pushed to the tire shape stamped on the mold inner surface at an appropriate pressure as the medium is expanded through the unit 3, and when the vulcanization is completed, the tire has a unique tread and groove shape.

However, when the tire is vulcanized by the conventional vulcanizer as described above, the temperature difference occurs between the upper and lower parts of the bladder while the hot steam supplied in the heat supply step and the nitrogen gas supplied in the pressure supply step are mixed with each other. In other words, the steam supplied in the previous stage is high temperature, but the nitrogen gas supplied afterwards is the room temperature, and therefore, due to the difference in density, the steam and nitrogen gas are positioned at the upper and lower layers of the bladder, respectively. As the steam condenses due to the inflow of nitrogen gas at room temperature and the condensed water is collected at the bladder bottom, different temperature layers are formed in the bladder unit for each of the upper, lower, and bottom parts, and the tire is partially excessive. Vulcanization or conversely, it is not vulcanized. There is a problem that the quality of the ear is lowered.

On the other hand, in order to solve such a problem in the prior art by separately installing the auxiliary recovery pipe (14) in the bladder unit (3) to supply a high-pressure nitrogen gas and then inside the bladder through the auxiliary recovery pipe (14) Steam and nitrogen gas and internal condensate are discharged to induce a smooth mixing of steam and nitrogen gas, but this method delays the vulcanization time due to the heat loss caused by the intermittent discharge of steam in the bladder. Since the equipment must be additionally operated as long as the time for discharging and nitrogen gas, not only the productivity is lowered, but also the operating cost of the equipment is increased more than necessary due to the increase in the use of nitrogen gas.

In addition, since most tire manufacturing plants arrange tires continuously by arranging a plurality of vulcanizers at regular intervals, it is usually necessary to install a separate boiler and supply steam by supplying steam centrally. In order to minimize the cost of the production, when only some of the vulcanization apparatus to operate the production amount is less than the amount of steam generated because the waste is used because there is a problem that it is not suitable for the small amount production method.

Therefore, the present invention was invented to solve the above problems, and the condensed water is generated in the bladder due to the temperature difference with steam by supplying nitrogen gas heated to a predetermined temperature after the steam supplying step. Not only can it be minimized, but it also minimizes the temperature deviation inside the bladder by inducing a smooth mixing of steam and nitrogen gas, and makes it possible to cure only with electricity and nitrogen gas without continuously supplying steam. It is an object of the present invention to provide a tire vulcanization device configured to operate the vulcanization device intermittently at a production plant.

The present invention for achieving the above object is connected to the bladder unit, the circulating medium supply pipe having a heat medium supply pipe and a pressure medium supply pipe to supply steam and nitrogen gas from the outside, and the circulation to discharge these steam and nitrogen gas An internal curing apparatus having a drain pipe having a water pipe and an auxiliary return pipe; Mold opening and closing device for completely closing the mold to determine the outer shape of the tire on the inner surface of the mold stamped, the upper platen and lower platen for conducting the external heat source to the mold, and attached to the upper platen A tire vulcanizing device having an external vulcanizing device having a steam jacket and the like for conducting heat required for tire vulcanization from the outside of the mold to the outside of the tire while maintaining the state in close contact with the lower platen. An electric heating device is installed, and a second electric heating device and a circulation device are installed in the drain pipe, and a circulation pipe is connected and installed between the vulcanization medium supply pipe and the drain pipe of the circulation device.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic configuration diagram of a tire vulcanization apparatus according to the present invention, the same reference numerals are shown in the same parts as the conventional apparatus, Figure 1, the present invention is a bladder unit (3) as shown in the figure The heat exchanger 21 and the first electric heating device 22 using steam as a heat source are installed in the heat medium supply pipe 4 to supply steam from the outside, and the vulcanization medium supply pipe 15 and the drain pipe are installed. 16, the circulation pipe 23, the second electric heating device 24 and the circulation device 25 are installed, and the bladder is blown through the first electric heating device 22 and the second electric heating device 24. The temperature of the nitrogen gas supplied to the inside is automatically varied so that the temperature in the bladder unit 3 is kept constant at all times, and in the state where the supply of steam is stopped, the vulcanizing medium supply pipe 15 and the drain pipe 16 The circulation pipe 23 and the circulation device 25 and the second electricity installed between the In the device 24, parameters are configured to be capable of vulcanizing tires with only the nitrogen gas of high pressure.

That is, the heat exchanger 21 and the first electric heating device 22 are configured to pass through the heat medium supply pipe 4 and the high pressure medium supply pipe 5, and the vulcanization medium supply pipe 15 and the drain pipe 16 are connected to each other. The first control valve 26 and the second control valve 27, which are remotely controllable, are respectively installed in the branch, and the circulation pipe 23 branches to connect these vulcanizing medium supply pipe 15 and the drain pipe 16 to each other. While being connected to control the flow through the third control valve 28, the drain pipe 16 has an impeller 30 to be operated in accordance with the rotation of the motor 29 and the motor 29. And a second electric heating device (24) provided adjacent to the circulation device (25).

In addition, a temperature sensor (not shown) is installed at a predetermined position in the bladder unit 3 and is organically connected to a control device for automatically operating a vulcanizer, and is connected to a temperature in the bladder unit 3 detected by the sensor. Accordingly, a control power is applied to the first electric heating device 22 and the second electric heating device 24 to be selectively operated. The first electric heating device 22 has a low temperature of supplied nitrogen gas. The second electric heating device 24 is used to compensate for this, and when the steam supply is stopped, the circulation device 25, the circulation pipe 23, and the first, second, third control valves 26, 27, 28 are provided. It is configured to use together with the circulator 25. When the nitrogen gas is heated, its heat transfer amount is relatively less than that of steam, so it is not suitable as a heat medium. Therefore, when using a high temperature nitrogen gas as a heat source, the bladder unit ( 3) and second electric heating cabinet Continuously circulating the nitrogen gas is between 24 are to be used for the purpose of bladder remains more constant the internal temperature.

Next, the operation of the present invention and the effects thereof will be described with reference to the accompanying drawings.

In the tire vulcanization apparatus according to the present invention, when the vulcanization apparatus is operated while the third control valve 28 is closed, nitrogen gas is separated by about 10 ° C. while being heat-exchanged by steam in the heat exchanger 21. Is raised to a predetermined temperature while passing through the first electric heating device 22, and is supplied into the bladder unit 3 via the vulcanizing medium supply pipe 15 in such a raised state, whereby the bladder unit ( 3) Since it is easily mixed with the internal steam, it is not necessary to discharge steam and nitrogen gas in the bladder unit to induce mixing, thereby preventing heat loss and greatly shortening tire curing time, thereby improving productivity. It is possible to reduce the amount of nitrogen gas used.

In addition, while the steam supply is stopped, the second regulating valve 27 is closed and the third regulating valve 28 is opened while the first regulating valve 26 is opened. 24) and the circulator 25 to supply nitrogen gas used for vulcanization and then discharged from the bladder unit 3 back into the bladder unit 3 so that the nitrogen gas can be used in parallel with the heat medium and the pressure medium. do.

That is, the heat exchange is carried out through the heat exchanger 21 and then supplied to the bladder unit 3 through the vulcanization medium supply pipe 15 in a state of being preheated to a predetermined temperature in the first electric heating device 22 to be used for vulcanization. After the nitrogen gas discharged through the drain pipe 16 is preheated again by the second electric heating device 24 to a predetermined temperature and then the impeller 30 rotated by the motor 29 is called as a medium. Nitrogen gas is re-supplied to the bladder unit (3) via the circulation pipe (23) and the vulcanization medium supply pipe (15), and such a series of operations are repeatedly performed to provide the vulcanization medium supply pipe (15) to the bladder unit. (3) → Drain pipe 16 → Second electric heating device 29 → Circulating device 25 → Circulating pipe 23 → Vortexing medium supplying only nitrogen gas instead of steam, constituting a circulation circuit The operation can be carried out, which is due to the nature of nitrogen gas The amount of heat consumed in the cabin is extremely low, less than 50k㎈ based on the tires for passenger cars, and the amount of heat required for preheating through the second electric heating device 29 is extremely small, so that the power consumption is also insufficient. It is possible to uniformize the temperature of and to prevent the generation of condensate.

As described above, the tire vulcanization apparatus according to the present invention can minimize the generation of condensed water in the bladder due to the temperature difference with steam by supplying nitrogen gas in a heated state after the steam supplying step. By inducing a smooth mixing of steam and nitrogen gas, the temperature deviation inside the bladder can be minimized, and when steam supply is interrupted, it can be vulcanized by electricity and nitrogen gas only. There is an advantage to running the device.

1 is a schematic configuration diagram of a conventional tire vulcanization apparatus,

2 is a schematic configuration diagram of a tire vulcanization device according to the present invention.

1 --- internal vulcanizer, 2 --- external vulcanizer,

3 --- bladder unit, 4 --- heating medium supply pipe,

5 --- high pressure medium supply pipe, 6 --- low pressure medium supply pipe,

7 --- circle, 8 --- mould,

9 --- mold opening and closing device, 10 --- upper platen,

11 --- lower platen, 12 --- steam jacket,

13 --- Green Tire, 14 --- Assistant Collection Officer,

15 --- vulcanized media supply piping, 16 --- drain piping,

17,18 --- drain pipe, 19,20 --- steam supply pipe,

21 --- heat exchanger, 22 --- first electric heater,

23 --- circulation tube, 24 --- second electric heater,

25 --- circulator 26 --- 1st control valve,

27 --- second regulating valve, 28 --- third regulating valve,

29 --- motor, 30 --- impeller,

Claims (5)

Connected to the bladder unit (3), a vulcanizing medium supply pipe (15) having a heat medium supply pipe (4) and a pressure medium supply pipes (5, 6) to supply steam and nitrogen gas from the outside and to discharge these steam and nitrogen gas An internal curing apparatus (1) having a drain pipe (16) having a main recovery pipe (7) and an auxiliary recovery pipe (14); The mold opening and closing device 9 for completely closing the mold 8 for determining the outer shape of the tire to the mold inner surface of which the outer shape of the tire is imprinted, and an upper platen 10 and a lower platen for conducting the external heat source to the mold. (11) and a steam jacket (12) attached to the upper platen (10) to conduct heat required for tire vulcanization from the outside of the mold to the outside of the tire while maintaining a state of being in close contact with the lower platen (11) after assembly. In a tire vulcanizing device having one external vulcanizing device (2), The heat exchanger 21 and the first electric heating device 22 are installed in the heat medium supply pipe 4, and the second electric heating device 24 and the circulation device 25 are installed in the drain pipe 16. , The tire vulcanization apparatus, characterized in that the circulation pipe 23 is connected between the vulcanization medium supply pipe 15 and the drain pipe 16 of the circulation device 25. The pressure medium supply pipe (5) is connected to the heat exchanger (21) and the first electric heating device (22), so that nitrogen gas flowing through the pressure medium supply pipe (5) is exchanged. The tire vulcanizing apparatus, characterized in that to be supplied to the bladder unit (3) after being heated in the (21) and then further heated in the first electric heating device (22). A tire vulcanization device according to claim 1, characterized in that the first electric heating device (22) is configured to preheat nitrogen gas before it is supplied to the bladder unit (3). 2. The circuit according to claim 1, wherein the circulation device (25) is composed of a motor (29) and an impeller (30) connected to the motor (29) and operated according to a control signal of a sensor installed in the bladder unit (3). Tire vulcanizing device characterized in that the. The first control valve 26, the second control valve 27 and the third control valve 28 are installed in the vulcanization medium supply pipe 15, the drain pipe and the circulation pipe 23, respectively. Tire circulating circuit is constituted by individually controlling these valves (26, 27, 28).