JP4615773B2 - Steam vulcanizer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for directly vulcanizing an unvulcanized product with steam, and more particularly to a steam vulcanizing apparatus capable of arbitrarily adjusting the pressure and temperature with a mixed fluid of steam and compressed air.
[0002]
[Prior art]
As a conventional steam vulcanizing apparatus, for example, one that vulcanizes a rubber roll is disclosed in JP-A-50-3483. In this method, a rubber raw material is rolled into a sheet shape and laminated around a core material, and then the surface is wrapped with a film sheet or cloth tape and vulcanized by thermal steam.
[0003]
[Problems to be solved by the invention]
In the above conventional one, after the worker wraps and vulcanizes the film sheet around the rubber roll, the worker has to remove the film sheet again, which complicates the work process and takes time for the work process. There was a problem that needed.
[0004]
The reason for wrapping the unvulcanized rubber is to prevent the rubber from expanding during vulcanization or being deformed by heat dripping.
[0005]
Accordingly, an object of the present invention is to obtain a steam vulcanizing apparatus that can eliminate wrapping, simplify the vulcanization process, and shorten the working time.
[0006]
[Means for Solving the Problems]
The means taken to solve the above problems is to place the unvulcanized rubber in a sealed container, supply steam from the steam supply pipe into the container, and directly contact the unvulcanized steam with the steam. In the vulcanized product, a compressed air supply pipe for supplying compressed air of a predetermined pressure is connected to the sealed container, and the sealed container is vulcanized in a mixed state of compressed air and steam, and steam is supplied. Vapor dispersion supply means for distributing and supplying vapor to the entire inside of the container is attached to the container side end of the tube, and the vapor dispersion supply means is formed so as to substantially cover the upper surface of the container at the end of the steam supply pipe. It is constituted by a steam reservoir and a mesh member having a large number of fine through holes provided at the lower end of the steam reservoir .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
By making the inside of a sealed container into a mixed state of compressed air and steam and adjusting the partial pressures of the compressed air and steam, the inside of the container can be vulcanized at an arbitrary pressure or temperature.
[0008]
In the case of steam, strictly speaking, in the case of saturated steam, the pressure and temperature are uniquely determined, and the temperature can be set to an arbitrary value by adjusting the pressure.
[0009]
Adjust the steam pressure to set the steam temperature to a predetermined value suitable for vulcanization, and the sum of the partial pressures of steam and compressed air will be a predetermined pressure that does not cause deformation due to expansion or dripping of rubber during vulcanization. By setting, wrapping can be made unnecessary.
[0010]
By installing vapor dispersion supply means that distributes and distributes steam throughout the sealed container, it is possible to supply steam to the entire sealed container and make temperature distribution uniform, thereby preventing temperature unevenness. Thus, the entire unvulcanized product can be uniformly vulcanized.
[0011]
As the steam dispersion supply means, a mesh member having a steam reservoir formed at the end of the steam supply pipe so as to substantially cover the upper surface of the container, and further having many fine through holes on the container side end surface of the steam reservoir. By attaching the, steam can be supplied to the entire inside of the container through this mesh member.
[0012]
【Example】
In FIG. 1, a vulcanizing can 1 as a sealed container, a steam supply pipe 2, a compressed air supply pipe 3, and a steam dispersion supply means 20 constitute a steam vulcanizer.
[0013]
The vulcanizing can 1 has a horizontally long cylindrical shape and a shelf 4 on which a rubber roll (not shown) as an unvulcanized product is placed. A partially spherical lid 5 is attached to the side of the vulcanizing can 1 so as to be freely opened and closed. At the start of vulcanization, the lid 5 is opened and a rubber roll is placed on the shelf 4.
[0014]
A steam supply pipe 2 and a compressed air supply pipe 3 are connected to the upper part of the vulcanizing can 1. The steam supply pipe 2 is connected to the steam dispersion supply means 20 via the valve 6 and the regulating valve 7, and the compressed air supply pipe 3 is connected to the vulcanizing can 1 via the valve 9 and the regulating valves 10 and 11.
[0015]
The steam dispersion supply means 20 attached to the inner upper surface of the vulcanizing can 1 includes a steam reservoir portion 21 having a length that extends over almost the entire length of the horizontally long vulcanizing can 1, and a mesh member 22 provided at the lower end of the steam reservoir portion 21. Consists of. The steam supplied from the steam supply pipe 2 to the steam reservoir 21 is supplied over almost the entire vulcanizing can 1 from a fine through hole in the mesh member 22.
[0016]
A pressure sensor 12 for detecting the internal pressure and a temperature sensor 13 for detecting the temperature are attached to the upper portion of the vulcanizing can 1. The pressure sensor 12 is electrically connected to the control valves 7, 10, and 11 via a pressure controller (not shown). Each control valve 7, 10, 11 can control the partial pressure arbitrarily by adjusting the passage amount of steam or compressed air by increasing or decreasing the valve opening. is there.
[0017]
Similarly, the temperature sensor 13 is electrically connected to the control valve 7 via a temperature controller (not shown). Since the pressure and temperature of saturated steam are uniquely determined, the temperature can be maintained at a predetermined value by controlling the steam pressure to a predetermined value. Therefore, in this embodiment, the temperature sensor 13 is not necessarily required to be used auxiliary.
[0018]
An atmospheric communication pipe 15 is connected to the right side of the vulcanizing can 1 via a valve 14. In addition, a condensate drain pipe 16 is connected to the lower part of the vulcanizing can 1 to exclude condensate condensed with steam to the outside. A valve 17 and a steam trap 18 for discharging only the condensate to the outlet side are attached to the condensate drain pipe 16 in parallel.
[0019]
When vulcanizing a rubber roll or the like (not shown) placed on the shelf 4, first, compressed air having a predetermined pressure, for example, 3.2 KG, is supplied from the compressed air supply pipe 3 to the inside of the vulcanizing can 1 through the control valves 10 and 11. Supply. When the compressed air pressure inside the vulcanizing can 1 reaches 3.2 KG, subsequently, a predetermined pressure, for example, 5.0 KG of steam is supplied through the steam supply pipe 2, the control valve 7, and the steam dispersion supply means 20. The steam of 1.8 KG based on the pressure difference with the compressed air is injected into the vulcanizing can 1.
[0020]
By supplying compressed air of 3.2 KG and steam of 1.8 KG, the pressure in the vulcanizing can 1 becomes 5.0 KG. When the pressure reaches 5.0 KG, the valve 9 is closed and the supply of compressed air is stopped. On the other hand, since the steam is continuously supplied so that the pressure in the vulcanizing can 1 is maintained at 5.0 KG, the temperature of the saturated steam of 1.8 KG is 130 degrees C. The unvulcanized rubber roll in 1 is vulcanized under a pressure and temperature conditions of 5.0 KG and 130 degrees C.
[0021]
When vulcanizing only with steam without supplying compressed air, it becomes 1.8KG and 130 degrees C under the above conditions. On the other hand, when the steam pressure is set to 5.0 KG, the steam temperature rises to 158 degrees C. When the temperature condition of vulcanization is 130 ° C, the pressure is 1.8KG when vulcanized only with steam without using compressed air as in the prior art. The unvulcanized product will be deformed due to expansion and heat dripping, but in this embodiment, since 3.2 KG of compressed air is added, the temperature conditions are the same and the pressure is increased to 5.0 KG. Thus, expansion and deformation of the rubber roll can be prevented without wrapping.
[0022]
When steam and compressed air are supplied into the vulcanizing can 1 and vulcanized as in this embodiment, the steam and compressed air are separated after a while and the temperature in the vulcanizing can 1 is reduced. Although the variation becomes large, by supplying the steam from the steam dispersion supply means 20 to the entire inside of the vulcanizing can 1, the steam and the compressed air are mixed to make the variation in the temperature distribution in the vulcanizing can 1 smaller. be able to.
[0024]
【The invention's effect】
As described above, according to the present invention, the inside of a sealed container is vulcanized while maintaining an arbitrary temperature and pressure with steam and compressed air, thereby eliminating the need for wrapping and simplifying the vulcanization process. Can be shortened.
[0025]
By installing the vapor dispersion supply means in the vulcanizing can, the entire steam and compressed air in the vulcanizing can can be stirred and mixed to make the temperature distribution uniform, and uneven vulcanization can be prevented.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a steam vulcanizing apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vulcanization can 2 Steam supply pipe 3 Compressed air supply pipe 7 Control valve 10, 11 Control valve 16 Condensate rejection pipe 20 Steam dispersion supply means 22 Mesh member

Claims (1)

An unvulcanized rubber product is placed in a sealed container, and steam is supplied from the steam supply pipe into the container and the steam is brought into direct contact with the unvulcanized product to vulcanize. A compressed air supply pipe that supplies compressed air of a predetermined pressure is connected to vulcanize the sealed container in a mixed state of compressed air and steam. Vapor dispersion supply means is provided to distribute and supply, and the vapor dispersion supply means is provided at the end of the steam supply pipe so as to substantially cover the upper surface of the container, and at the lower end of the vapor storage section. A steam vulcanizing apparatus comprising a mesh member having a large number of fine through holes .

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