JPH0636894Y2 - Steel band type continuous vulcanizer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention continuously applies unvulcanized sheet materials (including rubber plate materials) that require vulcanization, such as roofing materials, flooring materials, and conveyor belt materials. The present invention relates to a steel band type continuous vulcanizing device for vulcanization, and more particularly to a steel band type continuous vulcanizing device provided with a post-heating device for auxiliary heating after vulcanizing by the vulcanizing device.

[Prior Art] The main configuration of a steel band type continuous vulcanizer is as follows. That is, as shown in FIG. 2, the driving roll 22 is arranged above the heating drum 21, the auxiliary roll 23 is arranged below the heating drum 21, and the tension roll 24 is arranged behind the heating drum 21. An endless steel band 25 is wound around the drum 21 and a part of the peripheral surfaces of the rolls 22 to 24. Then, the drive roll 22 is rotated with the unvulcanized sheet material S passed through a vulcanization zone 26 formed between a part of the peripheral surface of the heating drum 21 and a steel band 25 pressed against the heating drum 21. The steel band 25 is circulated by means of the above, and the unvulcanized sheet material S is vulcanized by being heated by the heating drum 21 while being pressed by the steel band 25 in the vulcanization zone 26. Reference numeral 27 is a back heater for auxiliary heating. For example, Japanese Patent Laid-Open No. 62-271709 describes this type of vulcanizing apparatus.

By the way, in a vulcanizer, it is desired to shorten the vulcanization time and improve the vulcanization efficiency.

Then, as a method of improving the vulcanization efficiency, the heating drum diameter is increased to enlarge the vulcanization zone, the heating temperature in the vulcanization zone is increased, and an auxiliary heating device is provided before or after or before and after the vulcanization device. The three methods are generally used.

However, in the above method, since the vulcanization apparatus becomes large,
The equipment cost will be extremely high, and the vulcanization cost will increase significantly. Further, in the above method, the vulcanization conditions vary depending on the type of unvulcanized sheet material, and the maximum temperature required for vulcanization also has a limit (at most 250 ° C), so the heating temperature can be increased without limit. Can not. Therefore, the above-mentioned method is generally superior to the above-mentioned methods and in terms of economical efficiency.

The above-mentioned method that has been conventionally performed is specifically the third method.
As shown in the figure, auxiliary heating devices B and C are provided in front of and behind the steel band type continuous vulcanization device A, and before the vulcanization device A vulcanizes, the sheet material S is passed through the pre-heating device B to be vulcanized. After preheating to a temperature close to the vulcanization temperature, and after vulcanization by the vulcanization apparatus A to eliminate the risk of gas generation in the sheet material S, the sheet material S is passed through the post-heating apparatus C to be completely vulcanized. (Post-vulcanization). In both of the heating devices B and C, the inside of the chamber having the entrance and exit of the sheet material S is kept at a constant temperature by the heating device, and the sheet material S is heated while reciprocating several times through the roll R in the chamber. It has a structure that

[Problems to be Solved by the Invention] In the above continuous vulcanizing apparatus equipped with an auxiliary heating device, the vulcanizing device and the auxiliary heating devices before and after the vulcanizing device are separate bodies, and as shown in FIG. Since the auxiliary heating devices B and C are installed separately from each other, when the sheet material S passes between the devices, the sheet material S heated to a predetermined temperature is cooled and a temperature drop occurs. In particular, the vulcanization temperature in the vulcanizer A is
Since it is higher than the heating temperature by the pre-heating device B, the temperature drop of the sheet material S between the vulcanization device A and the post-heating device C is large. Therefore, in the post-heating device C, the temperature of the sheet material S once lowered must be raised to the temperature required for post-vulcanization, which requires wasteful energy and is uneconomical.
The heat capacity required for the post-heating device C increases, and the size of the device itself increases, so that the installation space for the device expands.

The present invention has been made in view of the above points, and provides a steel band type continuous vulcanizer capable of shortening the vulcanization time, saving energy, and solving the problem of the installation space of the post-heating device. Is what you are trying to do.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention is directed to a heating drum, a drive roll arranged in front of and above the heating drum, a tension roll arranged behind the heating drum, and the heating drum. Endless steel band is sequentially wound around the auxiliary roll arranged on the lower front side of the heating band, and between the steel band and a part of the peripheral surface of the heating drum in the region where the unvulcanized sheet material is pressed by the steel band. In the vulcanization zone formed in, in the steel band type continuous vulcanizing device of the structure for passing the unvulcanized sheet material to continuously vulcanize,
A post-heating device for the sheet material is integrally provided above the continuous vulcanization device, and the post-heating device is provided with a chamber having an inlet at the lower end and an outlet at the upper end, and the drive roll from the inlet of the chamber. A heating cover body extending in a J shape along the upper sheet material conveying path and provided with a heater along the sheet material conveying path, and a plurality of heating cover bodies provided in the chamber at intervals in the vertical direction. From the plate heaters in stages, a plurality of rolls rotatably provided in the vicinity of both sides of the plate heaters for changing the conveying direction of the sheet material, and a convection heater arranged in the lower part of the chamber over the longitudinal direction. I am configuring.

[Operation] According to the continuous vulcanizing apparatus of the present invention having the above-described configuration, immediately after the sheet material that has been vulcanized by being pressed and heated in the vulcanizing zone of the vulcanizing apparatus passes through the vulcanizing zone. Then, it enters the heating cover body and is heated by the heater and sent into the chamber above the steel band under the drive roll. Then, the sheet material is heated to a predetermined temperature by the convective heat of the lower heater and the direct heating of the plate heater while being reciprocally conveyed right and left through the rolls in the chamber, and completely vulcanized, and then exited from the outlet. It is carried out of the chamber. As a result, the sheet material that has been roughly vulcanized by the vulcanization device is sent to the subsequent post-heating device and heated almost completely without being cooled, and the vulcanization time is greatly shortened. It

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a steel band type continuous vulcanizer of the present invention. In the figure, the main body portion 1 of the continuous vulcanizer has a known structure in which a steel band 25 is stretched around a heating drum 21, a driving roll 22, an auxiliary roll 23, and a tension roll 24. , Arc-shaped rear heater 27
Has been deployed.

2 is a post-heating device, and this post-heating device 2 is the main body part 1
It is integrally arranged on the upper part of and has the following configuration. A heating cover body 5 is extended in a J shape along the sheet material S transport path on the drive roll 22 from an inlet 4 opened at the lower end of one side (left side in the drawing) of the chamber 3, and the tip of the cover body 5 is Has reached near the end point of the pressure contact area between the heating drum 21 and the steel band 25 (in other words, the sheet material outlet of the vulcanization zone 26). In addition, in the cover body 5, the sheet material S
An electric heater 6 is arranged along the conveyance path of.

Then, in order to sufficiently heat the sheet material S by reciprocating it several times between the inlet 4 of the sheet material S and the outlet 7 opened on the other side (right side of the drawing) of the chamber 3, the inside of the chamber 3 is heated. In this case, five rolls 8 for changing the conveying direction of the sheet material S are rotatably arranged. Ie 3 to the left
The individual rolls 8 and the two rolls 8 on the right side are vertically spaced apart from each other.

Further, as the means for heating the sheet material S, the ero fin heater 9 and the plate heater 10 are used in this embodiment. The erofin heater 9 is arranged in the lower part of the chamber 3 over its longitudinal direction, and the circulation fan 11 adjacent to the left end of the heater 9 circulates the heat of the heater 9 throughout the chamber 3. Further, the plate heaters 10 are provided in five stages up and down, and are installed below the conveyance path of the sheet material S between the left and right rolls 8, respectively, so that the heaters 10 directly heat the sheet material S being conveyed. There is.

Next, the vulcanization mode of the continuous vulcanizing apparatus of the above-mentioned embodiment will be described.

In FIG. 1, the unvulcanized sheet material S that has not been preheated is vulcanized between the heating drum 21 and the steel band 25 from above the steel band 25 that is fed along the upper side of the auxiliary roll 23 in the arrow direction. Delivered within zone 26. Then, the sheet material S that has been substantially vulcanized in the vulcanization zone 26 is
Immediately after exiting from the outlet of, the heating cover body 5 enters the heating cover body 5 and is sent to the chamber 3 above the steel band 25 below the drive roll 22 while being heated by the electric heater 6. In the chamber 3, the sheet material S is rolled 8
While being reciprocated to the left and right through the sheet, it is heated to a predetermined temperature by the convective heat by the erotic fin heater 9 and the direct heating by the plate heater 10 and completely vulcanized.
To the outside of the chamber 3.

Next, the experimental result about the steel band type continuous vulcanizer equipped with the post-heating device of the said Example is shown.

1. Vulcanizing condition (vulcanizing device) Vulcanizing time: 51 seconds Temperature of heating roll: 200 ° C Temperature of steel band heated by rear heater: 230 ° C 2. Postheating condition (postheating device) Chamber temperature: 160 ℃, 165 ℃, 170 ℃ Sheet material retention time: 2 to 6 minutes (1 minute interval) 3. Vulcanization target roofing sheet (thickness 1.2mm) 4. Comparative vulcanization conditions Same vulcanization equipment (but post-heating) (No equipment) Vulcanization time: 102 seconds Heating roll temperature: 200 ° C Temperature of steel band heated by rear heater: 230 ° C 5. Results Optimal condition for post-heating device is that chamber temperature is 16
At 5 ° C, the residence time of the sheet material was 3 minutes.

When the heating conditions in the post-heating device are set to the above-mentioned optimum conditions to obtain a roofing sheet having the same physical properties, in the present invention, the vulcanization time in the vulcanization device is 51 seconds and the existing vulcanization time (102
Seconds) was shortened to half. The shortening time of vulcanization varies depending on the material (content of compound) of the unvulcanized sheet.

In addition, running costs have been reduced to almost half compared to the current equipment.

By the way, in the above-mentioned embodiment, the pre-heating device for pre-heating before vulcanization is not provided, but if the pre-heating device (not shown) is provided together with the post-heating device 2, the vulcanization efficiency is further improved. . When the pre-heating device is provided, the pre-heating device is installed in the vicinity of the entrance of the vulcanization zone 26 of the vulcanizing device 1 as in the post-heating device 2, so that the sheet material S after the pre-heating is installed. It prevents the temperature from dropping. Further, the heating means of the post-heating device 2 described above may be steam or high frequency wave. Furthermore, the position of the post-heating device 2 when integrally combined with the vulcanization device 1 can be appropriately changed depending on the structure of the vulcanization device 1, and may be provided, for example, in the lower part of the vulcanization device 1.

[Effects of the Invention] The steel band type continuous vulcanizing apparatus of the present invention having the above-described configuration has the following effects.

(1) The vulcanization efficiency is significantly improved without increasing the size of the vulcanizer, and the vulcanization time in the vulcanizer can be shortened, which is economical.

(2) Since the temperature of the sheet material does not drop between the vulcanizer and the post-heating device, the capacity of the post-heating device can be made smaller than that of the conventional one, and energy is not wasted, and running costs are reduced. it can.

(3) Since the post-heating device is integrally provided above the continuous vulcanizing device, the installation space for the post-heating device becomes unnecessary, and the problem of the installation space can be solved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a steel band type continuous vulcanizing apparatus of the present invention, FIG. 2 is a sectional view of a conventional general steel band type continuous vulcanizing apparatus, and FIG. It is a schematic sectional drawing of the conventional vulcanization apparatus provided with the post-heating apparatus. 1 ... Vulcanizing device (main body part), 2 ... Post-heating device, 3 ...
... Chamber, 4 ... Inlet, 5 ... Heating cover, 6 ...
… Electric heater, 7 …… Exit, 8 …… Roll, 9 …… Elofin heater, 10 …… Plate heater.

Claims (1)

[Scope of utility model registration request] 1. An endless steel band consisting of a heating drum, a drive roll arranged on the upper front side thereof, a tension roll arranged on the rear side of the heating drum, and an auxiliary roll arranged on the lower front side of the heating drum in this order. The unvulcanized sheet material is wound in the vulcanization zone formed between the steel band and the partial circumferential surface of the heating drum in the region where the unvulcanized sheet material is pressed by the steel band. In a steel band type continuous vulcanizer having a structure for passing and continuously vulcanizing, a post-heating device for a sheet material is integrally provided above the continuous vulcanization device, and the post-heating device is provided with an inlet at a lower end. And a chamber having an outlet at the upper end and a J-shaped extension extending from the inlet of the chamber along the conveyance path of the sheet material on the drive roll along the conveyance path of the sheet material. A heating cover body provided with a heater, a plurality of stages of plate heaters provided in the chamber at intervals in the vertical direction, and a sheet material conveying direction provided rotatably near both sides of the plate heaters. A steel band type continuous vulcanizing device comprising a plurality of changing rolls and a convection type heater arranged in the lower portion of the chamber in the longitudinal direction.