JPH06278142A - Continuously vulcanizing apparatus - Google Patents

Abstract

PURPOSE:To provide a continuously vulcanizing apparatus wherein it can be placed in a small space, its running cost is cheap, and environmental pollution by reaction gas can be prevented from occurring. CONSTITUTION:A kerosine burner 10 which burns fuel inside a combustion chamber 4 provided near a vulcanzing chamber 3, is provided. An air discharge opening of a circulating fan 12 provided inside the combustion chamber 4 is communicates with air feeding ducts 9a, 9b having a number of slit nozzles 8 via an air feeding duct 9c. A squarish cylindrical air circulation duct 13a having many intake ports 14 is provided on both side walls in a longitudinal direction near a bottom part of the vulcanizing chamber 3. An air circulation duct 13b wherein its lower end communicates with the inside of the air circulation duct 13a and its upper end is open to the inside of the combustion chamber 4, is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous vulcanizing device for vulcanizing unvulcanized rubber semi-finished products (hereinafter referred to as "work") in a vulcanizing chamber by heated air while continuously conveying them. .

[0002]

2. Description of the Related Art Conventionally, continuous vulcanizers of this type are roughly classified into two types, one using a gas burner as a heating device and the other using an electric heater.

FIG. 4 shows a continuous vulcanizer using a gas burner 101 as a heating device. The air in the vulcanization chamber 102 is returned from the intake port 104 to the return air duct 1 by the circulation fan 103.
It is sent to the combustion chamber 106 via 05, where the gas burner 1
It is heated by 01. Air heated duct 1
It is returned to the inside of the vulcanization chamber 102 by 07 and is ejected from a plurality of slit nozzles (not shown) provided on the lower surface of the air supply duct 108 inside the vulcanization chamber 102. The vulcanization chamber 102 is provided with a large number of conveying rollers 109 driven by a motor (not shown), and the work A is vulcanized by the heated air blown from the slit nozzle while being continuously conveyed by the conveying rollers 109. It The air used for vulcanization is
A part thereof is sucked out from the vulcanization chamber 102 by the exhaust fan 110 and released into the atmosphere, and the combustion chamber 10 again
It is sent to 6 and circulates. Considering the safety when the work A ignites due to the flame of the gas burner 101 and causes a fire, for example, the vulcanization chamber 102 is installed on the first floor of the factory and the combustion chamber 106 is installed on the second floor. The vulcanization chamber 10
2 and the combustion chamber 106 were usually installed on different floors.

FIG. 5 shows a continuous vulcanization device using an electric heater 111 as a heating device. Air in the vulcanization chamber 102 is blown into the air supply duct 113 by the circulation fan 103 through the air supply duct 112. After being heated by an electric heater 111 provided in the air supply duct 113, the gas is ejected from a plurality of slit nozzles (not shown) provided on the upper surface of the air supply duct 113. The vulcanization chamber 102 is provided with a large number of conveying rollers 109 driven by a motor (not shown), and the work A is vulcanized by the heated air blown from the slit nozzle while being continuously conveyed by the conveying rollers 109. It A part of the air used for vulcanization leaks from the inlet / outlet of the work A and is discharged into the atmosphere by the suction of the exhaust fan 110, and is sucked into the circulation fan 103 again and flows inside the vulcanization chamber 102. Circulate.

[0005]

When the work is vulcanized, a part of the substance (mainly oil and fat) mixed in the work is vaporized and evaporated. These vaporized substances generated during vulcanization (hereinafter referred to as “reaction gas”) are toxic substances including nitrogen oxides, sulfur oxides, acrylonitrile, benzene, etc., have a foul odor, and are released into the atmosphere. And it becomes black smoke and causes various pollution.

In the continuous vulcanizer of FIG. 4, the vulcanization chamber 1
02 and the combustion chamber 106 are separated, the return air duct 1
05, and the temperature of the air when passing through the air supply duct 107, the reaction gas easily tars and adheres to the inner surfaces of the return air duct 105 and the air supply duct 107, and the flame of the gas burner 101 causes this tar. There was a risk that flaky deposits were ignited, spread, fired from the slit nozzle, and finally burned onto the work A. Therefore, the vulcanization chamber 102
The combustion chamber 106 and the combustion chamber 106 must be installed apart from each other by about 10 m or more, and the installation space is increased, and the temperature of the air when passing through the duct is greatly lowered, resulting in an increase in fuel cost.

When the reaction gas passes through the combustion chamber 106, it is burned and oxidized by the flame of the gas burner 101 to become a harmless gas. However, in the continuous vulcanizing apparatus of FIG. 4, there is only one intake port 104. Since the air is only opened to the inside, the circulation efficiency of the air by the circulation fan 103 is low, and the reaction gas generated at a position distant from the intake port 104 quickly
6 is not sent to the vulcanization chamber 102, it adheres to various places in the vulcanization chamber 102 in a tar shape, and when the work A is a colored rubber other than black, it has a drawback of contaminating it, and a high-concentration reaction. There is also a drawback that the gas is released into the atmosphere by the exhaust fan 110 to cause pollution.

In the continuous vulcanizer of FIG. 5, since the heating is performed by the electric heater 111, the risk of fire is low, but the electric heater 111 having a low heat generation temperature does not burn the reaction gas and vulcanizes it. Because it circulates in the chamber 102,
Similar to the continuous vulcanizer shown in FIG. 4, there is a drawback that the colored work A is polluted and the reaction gas is discharged into the atmosphere by the exhaust fan 110 to cause pollution. Further, the heating by electricity has a drawback that the running cost increases.

In order to prevent pollution due to the reaction gas, it may be possible to install a reaction gas treatment equipment such as an afterburner for burning the reaction gas outside the continuous vulcanizer, but the equipment cost and the running cost are reduced. Since it would be more expensive, such equipment was rarely actually installed.

In view of the above-mentioned drawbacks of the prior art, the present invention can be installed in a small space, has a low running cost, does not stain colored workpieces, and can prevent pollution by reaction gas. It is intended to provide a vulcanizing device.

[0011]

In order to achieve the above object, a continuous vulcanizing apparatus according to the present invention is provided in a vulcanizing chamber for vulcanizing while continuously conveying a work, and in the vicinity of the vulcanizing chamber. A burner that burns fuel in the combustion chamber, an air supply duct that guides the air heated by the burner into the vulcanization chamber and blows it toward the work, and a return air duct that returns the air from the vulcanization chamber to the combustion chamber. The return air duct is characterized in that its intake port is opened over substantially the entire vulcanization region of the work.

From the viewpoint of fuel cost, it is desirable that the burner uses petroleum as a fuel.

Further, from the viewpoint of preventing pollution, it is conceivable to provide an exhaust port near the combustion portion of the burner for discharging the air in the combustion chamber to the outside.

Further, from the viewpoint of pollution prevention, a vulcanization room temperature measuring instrument for measuring the temperature of air in the vulcanization chamber and a vulcanization controlling air temperature in the vulcanization chamber based on the measurement result of the vulcanization room temperature measuring instrument. It is also conceivable to adopt a configuration including room temperature control means.

[0015]

According to the continuous vulcanizing apparatus of the present invention configured as described above, since the intake port of the return air duct is opened over almost the entire vulcanizing region of the work, the vulcanizing chamber The reaction gas generated in the part is also immediately sent to the combustion chamber and burned and oxidized. Further, since the circulation efficiency is good as described above, the reaction gas concentration is kept low in any part of the vulcanization chamber, and the reaction gas concentration of the gas released into the atmosphere by the exhaust fan is also low. Further, since the reaction gas concentration is low, the adhesion of combustible tar-like substances to the ducts is reduced, and even if the vulcanization chamber and the combustion chamber are close to each other, the work does not cause a fire.

By providing an exhaust port for discharging the air in the combustion chamber to the outside in the vicinity of the combustion section of the burner, the air containing the reaction gas is heated by the flame of the burner and then discharged from the exhaust port. You can

Further, there is provided a vulcanization room temperature measuring device for measuring the temperature of the air inside the vulcanization chamber, and vulcanization room temperature control means for controlling the temperature of the air inside the vulcanization chamber based on the measurement result of the vulcanization room temperature measuring device. As a result, the temperature of the vulcanization chamber can be changed while maintaining the temperature of the combustion chamber above a certain level.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a sectional view of a continuous vulcanizing apparatus according to Example 1, and FIG. 2 is a sectional view taken along line BB of FIG. In these drawings, the continuous vulcanizing apparatus 1 has a vulcanizing chamber 3 and a combustion chamber 4 provided inside a machine frame 2 having a substantially closed box shape. A work-in port 5 and a work-out port 6 are provided on both left and right side walls of the vulcanization chamber 3. Between the carry-in port 5 and the carry-out port 6 are provided a large number of transport rollers 7 that are driven to rotate by a motor (not shown), and are vertically symmetrical with the work A transported by the transport rollers 7 being sandwiched therebetween. Air supply ducts 9a and 9b having a large number of slit nozzles 8 are provided on the surface facing the work A.

A kerosene burner 10 (an example of a burner) is provided outside the combustion chamber 4, and a combustion cylinder 11 connected to the kerosene burner 10 is inserted inside the combustion chamber 4 from the outside.
In addition, the circulation fan 12 having an air intake in the combustion chamber 4
Is provided, and the air outlet of the circulation fan 12 is provided with air supply ducts 9a and 9b in the vulcanization chamber 3 via the air supply duct 9c.
Is in communication with. The configuration including the air supply ducts 9a, 9b and 9c is an example of the air supply duct in the present invention.

In the vicinity of the bottom of the vulcanization chamber 3, the vulcanization chamber 3
A cylindrical return air duct 13a having a quadrangular cross section is provided from the vicinity of the wall surface on the carry-in port 5 side to the vicinity of the wall surface on the carry-out port 6 side. Both side walls in the longitudinal direction of the return air duct 13a are made of punching metal, and holes of the punching metal are opened as a large number of intake ports 14 on both side walls as a whole. Further, the lower end communicates with the inside of the return air duct 13a, and the upper end opens in the vicinity of the combustion tube 11 inside the combustion chamber 4
b is provided. Further, an exhaust port 15 is opened on the upper wall surface of the vulcanization chamber 3, and an exhaust fan 16 is provided in communication with the exhaust port 15. The structure including the return air ducts 13a and 13b is an example of the return air duct in the present invention.

Next, the operation of this embodiment configured as described above will be described. Circulation fan 12 and exhaust fan 1
6 is operated to ignite the kerosene burner 10 and the transport roller 7 is rotated to load the work A from the carry-in port 5 to the vulcanization chamber 3
When continuously fed into the vulcanization chamber 3, the air in the combustion chamber 4 heated by the flame from the kerosene burner 10 is passed through the air supply duct 9c by the circulation fan 12 to the air supply duct 9 in the vulcanization chamber 3.
a, 9b, jetted from the slit nozzle 8 and sprayed on the work A, and vulcanized. The vulcanized work A is continuously carried out from the carry-out port 6. The air vulcanized from the work A and the reaction gas generated during the vulcanization of the work A are sucked by the suction port 14 due to the negative pressure generated by the suction of the circulation fan 12.
From the return air duct 13a to the return air duct 13
It returns to the inside of the combustion chamber 4 via b. The air and reaction gas that have returned to the inside of the combustion chamber 4 are reheated by the flame from the kerosene burner 10, and the reaction gas is burned and oxidized to become a harmless gas, which is sucked into the circulation fan 12 again together with the heated air. And circulates between the combustion chamber 4 and the vulcanization chamber 3. The air circulating in the apparatus, the reaction gas, and a part of the gas in which the reaction gas is oxidized are sucked out from the exhaust port 15 by the exhaust fan 16 and released to the outside air.

In such an operation, in the continuous vulcanizing apparatus 1 of this embodiment, since the intake port 14 of the return air duct 13a is provided over almost the entire vulcanizing area of the work A, the inside of the vulcanizing chamber 3 will be described. The reaction gas generated in any part of the throat is immediately sent to the combustion chamber 4 and burned and oxidized. Therefore, the reaction gas rarely adheres to the various places in the apparatus in a tar shape, and the work A is not contaminated even if it is a colored product. In addition, since the circulation efficiency is good, the vulcanization chamber 3
The reaction gas concentration is kept low in any part of the
Since the reaction gas concentration of the gas released into the atmosphere by the exhaust fan 16 is low, even if the reaction gas processing equipment is not provided,
Less likely to cause pollution. Further, since no flammable tar-like substance is attached to the ducts, the work A does not cause a fire even when the vulcanization chamber 3 and the combustion chamber 4 are close to each other. The fuel cost can be reduced correspondingly because the temperature of the air does not decrease when passing through a long duct.

Example 2. FIG. 3 is a cross-sectional view of the continuous vulcanizing apparatus according to the second embodiment. In the figure, the same components as those in FIG. 1 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. 3 is different from FIG. 1 in the following points. That is, the vulcanization room temperature measuring instrument 21 is provided on the inner wall surface of the air supply duct 9a in the vulcanization chamber 3, and the combustion room temperature measuring instrument 22 is provided on the inner wall surface of the combustion chamber 4.
Are provided respectively. Further, an outside air intake 24 having a damper 23 is opened on the wall surface of the combustion chamber 4 on the side opposite to the side where the kerosene burner 10 is provided, and the opening degree of the outside air intake 24 is changed by changing the angle of the damper 23 via a link mechanism. A damper drive motor 25 for adjusting the further,
A controller 28 is provided which is connected to the kerosene burner 10, the vulcanization room temperature measuring device 21, the combustion room temperature measuring device 22 and the damper drive motor 25 and has a vulcanization room temperature setting dial 26 and a combustion room temperature setting dial 27. Furthermore, the exhaust port 15 is provided so as to open in the vicinity of the combustion cylinder 11 of the combustion chamber 4 (the combustion portion of the kerosene burner 10), and the exhaust fan 16 is also moved accordingly. The configuration including the damper 23, the outside air intake 24, the damper drive motor 25, and the control device 28 is an example of the vulcanization room temperature control means in the present invention.

Next, the operation of this embodiment configured as described above will be described. In this embodiment, the vulcanization room temperature setting dial 26 of the control device 28 is set to a temperature according to the type and shape of the work A within a range of 150 to 250 ° C., and the combustion room temperature setting dial 27 is set to 350 ° C., for example. The operation is started after setting the temperature suitable for the combustion of the reaction gas. The basic operation regarding the vulcanization of the work A is the same as that of the first embodiment, and therefore the description thereof is omitted.

When the operation is started, the controller 28 controls the temperature measured by the vulcanization room temperature measuring instrument 21 and the vulcanization room temperature setting dial 26.
An appropriate angle of the damper 23 is calculated from the set temperature and the rotation command is given to the damper drive motor 25. That is, the temperature measured by the vulcanization room temperature measuring instrument 21 is the vulcanization room temperature setting dial 2
When the temperature is higher than the set temperature of 6, when the damper 23 is moved so as to increase the opening degree of the outside air inlet 24, a large amount of low temperature outside air flows from the outside air inlet 24 because the inside of the combustion chamber 4 has a negative pressure. Then, the inflowing outside air is mixed with the air heated by the kerosene burner 10, is sucked into the circulation fan 12, and is sent to the air supply ducts 9a and 9b. Thereby, the temperature of the air in the vulcanization chamber 3 is changed to the low temperature side. When the temperature measured by the vulcanization room temperature measuring device 21 is lower than the temperature set by the vulcanization room temperature setting dial 26, the damper 23 is moved so as to reduce the opening degree of the outside air intake 24.

Further, the control device 28 uses the combustion room temperature measuring device 2
2 calculates the appropriate combustion amount of the fuel in the kerosene burner 10 from the measured temperature and the set temperature of the combustion room temperature setting dial 27, and issues a command to the fuel amount control unit (not shown) of the kerosene burner 10 so that the combustion amount becomes the combustion amount. give. That is, when the temperature measured by the combustion room temperature measuring instrument 22 is lower than the temperature set by the combustion room temperature setting dial 27, the amount of fuel combustion is increased, and when the temperature measured by the combustion room temperature measuring instrument 22 is higher than the temperature set by the combustion room temperature setting dial 27. Controls to reduce the amount of fuel combustion.

In this embodiment, since the temperature control of the vulcanization chamber 3 and the combustion chamber 4 can be carried out separately, the vulcanization chamber 3 can be used when the work A requires vulcanization at a relatively low temperature. Even if the temperature is lowered, the temperature of the combustion chamber 4 is maintained, and the lowering of the temperature of the combustion chamber 4 does not result in insufficient combustion / oxidation of the reaction gas. Therefore, pollution due to atmospheric release of the reaction gas is further prevented.

Further, the exhaust port 15 has the combustion cylinder 1 of the combustion chamber 4.
Since it is opened in the vicinity of 1, the air containing the reaction gas is heated by the flame of the kerosene burner 10 and then discharged from the exhaust port 15, so that the unoxidized reaction gas may be discharged. Pollution is further prevented for this reason as well.

In this embodiment, the temperature of the vulcanization chamber 3 and the combustion chamber 4 was controlled by the control device 28.
8 may control only the temperature of the vulcanization chamber 3. In this case, if the combustion amount of the fuel in the kerosene burner 10 is kept constant in a sufficiently large amount, the temperature of the combustion chamber 4 will be below a certain level. Can be prevented, and combustion and oxidation of the reaction gas do not become insufficient.

In the vulcanization room temperature control means of the present embodiment, the temperature of the vulcanization chamber 3 is controlled by adjusting the intake amount of the outside air. A large number of conduits (not shown) are inserted, and the flow rate of the cooling water flowing through the conduits is adjusted by the control device 28 so that the heat in the vulcanization chamber 3 is appropriately absorbed by the cooling water and the vulcanization chamber 3 You may make it control the temperature of.

Although the vulcanization chamber 3 and the combustion chamber 4 are provided in the machine frame 2 in the above embodiments, the combustion chamber may be provided in the vicinity of the vulcanization chamber and is not necessarily provided in the same machine frame. No need. Also, the burner used kerosene as fuel,
It may be fueled by petroleum other than kerosene, and
Gas or other fuel may be used. Further, although the carrying roller 7 is provided for carrying the work A, the work A may be carried by a belt conveyor or other carrying means. Furthermore, although the return air duct 13a has a rectangular tube shape having a large number of small-hole-shaped intake ports 14, air is sucked into the combustion chamber 4 almost uniformly from any portion in the vulcanization chamber 3. The shape of the return air duct and the intake port is arbitrary as long as it is possible. For example, the side of the vulcanization chamber 3 of the return air duct is branched into a plurality of parts, and the respective end portions thereof are arranged at equal intervals in the conveyance direction of the work A. It may be provided and each end may be used as an intake port. The height at which the intake port is provided is not limited to the vicinity of the bottom of the vulcanization chamber. Needless to say, the details of the continuous vulcanizer are not limited to those in the above embodiment.

[0032]

As described above, according to the continuous vulcanizing apparatus of the present invention, the intake port of the return air duct is opened over almost the entire vulcanizing region of the work.
The reaction gas generated in any part of the vulcanization chamber is immediately sent to the combustion chamber for combustion and oxidation. Therefore, the reaction gas rarely adheres to the various parts of the device in a tar-like shape,
Does not stain the colored workpieces. In addition, since the reaction gas concentration is kept low in any part of the vulcanization chamber, the reaction gas concentration of the gas released into the atmosphere will also be low, and it is possible to cause pollution without installing a reaction gas treatment facility. It is not very popular. Further, since the combustion chamber is provided in the vicinity of the vulcanization chamber, the installation space for the device is small, and there is no temperature drop of the air when passing through a long duct, so fuel cost can be saved accordingly. it can.

If the burner is fueled by oil, the fuel price per calorie generated is low, so
Compared with the conventional continuous vulcanizer using gas as a fuel or an electric heater, the fuel cost can be significantly reduced.

Further, by providing an exhaust port for discharging the air in the combustion chamber to the outside in the vicinity of the combustion section of the burner, the air containing the reaction gas is heated by the flame of the burner and then discharged from the exhaust port. As a result, the possibility that unoxidized reaction gas is discharged is reduced, and the generation of pollution is further prevented.

Further, the vulcanization room temperature measuring device for measuring the temperature of the air in the vulcanization chamber and the vulcanization room temperature control means for controlling the temperature of the air in the vulcanization chamber based on the measurement result of the vulcanization room temperature measuring device are provided. As a result, the temperature of the vulcanization chamber can be changed while keeping the temperature of the combustion chamber at a certain level or higher, so that the combustion / oxidation of the reaction gas does not become insufficient due to the decrease in the temperature of the combustion chamber, The pollution caused by the atmospheric release of the reaction gas is further prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing a continuous vulcanizing apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is a sectional view showing a continuous vulcanizing apparatus according to a second embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional continuous vulcanizing apparatus using a gas burner.

FIG. 5 is a cross-sectional view showing a conventional continuous vulcanizing apparatus using an electric heater.

[Explanation of symbols]

1 Continuous Vulcanizing Device 3 Vulcanizing Chamber 4 Combustion Chamber 9a, 9b, 9c Air Supply Duct 10 Kerosene Burner (Example of Burner) 11 Combustion Cylinder (Example of Burning Section of Burner) 13a, 13b Return Air Duct 14 Intake Port 15 Exhaust Port 21 Vulcanization room temperature measuring instrument 23 Damper (an example of constituent elements of vulcanization room temperature control means) 24 Outside air intake (an example of constituent elements of vulcanization room temperature control means) 28 Control device (of constituent elements of vulcanization room temperature control means) One example) A work (rubber semi-finished product)

Claims (4)

[Claims] 1. A vulcanization chamber for continuously vulcanizing a semi-finished rubber product, a burner for burning fuel in a combustion chamber provided near the vulcanization chamber, and an air heated by the burner. It is equipped with an air supply duct that guides it into the vulcanization chamber and blows it toward the semi-finished rubber product, and a return air duct that returns the air from the vulcanization chamber to the combustion chamber, and the return air duct has its intake port in the vulcanization region of the semi-finished rubber product. A continuous vulcanizing device, characterized in that it is opened over substantially the entire area. 2. The continuous vulcanizer according to claim 1, wherein the burner uses petroleum as a fuel. 3. The continuous vulcanizing apparatus according to claim 1, wherein an exhaust port for discharging the air in the combustion chamber to the outside is provided near the combustion portion of the burner. 4. A vulcanization room temperature measuring device for measuring the temperature of air in the vulcanization chamber, and vulcanization room temperature control means for controlling the temperature of air in the vulcanization chamber based on the measurement result of the vulcanization room temperature measuring device. The continuous vulcanizing apparatus according to claim 1, 2, or 3.