JP4624607B2 - Steam vulcanizer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for vulcanizing an unvulcanized product with steam. In particular, the entire unvulcanized product is heated at a uniform predetermined temperature, and as a result, the entire unvulcanized product can be uniformly vulcanized. The present invention relates to a steam vulcanizer.
[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 heat steam is supplied from pipes 5 and 12 into the core material and vulcanized.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional one, since the thermal steam is simply supplied through the pipe into the core material cavity, the heat steam does not spread uniformly over the core material cavity, and the entire unvulcanized product is removed. There was a problem that could not be uniformly vulcanized. In particular, when the volume of the cavity is large or the shape is complicated, the thermal steam is often not distributed uniformly throughout.
[0004]
Therefore, an object of the present invention is to uniformly vulcanize the entire unvulcanized product so that steam can be supplied uniformly and uniformly to the entire container regardless of the size and shape of the container. It is to obtain a steam vulcanizing apparatus that can be used.
[0005]
[Means for Solving the Problems]
Means for solving the above-mentioned problem is that an unvulcanized rubber is placed in a sealed container and steam is supplied into the container to vulcanize the unvulcanized substance. By connecting a plurality of steam ejectors through on-off valves, the outlet sides of the plurality of steam ejectors communicate with the inside of the sealed container, and the suction chambers of the plurality of steam ejectors are communicated with the inside of the sealed container. A part of the fluid in the sealed container is sucked by the ejector and supplied to the container together with the steam to promote convection of the fluid in the container.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
By arranging a plurality of steam ejectors having a suction chamber communicating with the inside of the sealed container, the steam ejector sucks the fluid containing the steam in the container, mixes it with the steam, and supplies it into the container. A fluid containing steam can be convected toward the suction chamber of the steam ejector.
[0007]
The convection of the fluid in the container can be controlled arbitrarily by controlling the opening and closing of the opening / closing valve and supplying the steam from the plurality of steam ejectors sequentially into the container.
[0008]
By the convection of the fluid containing steam, the steam spreads uniformly throughout the container, and the entire unvulcanized product can be uniformly vulcanized.
[0009]
【Example】
In the present embodiment, an example in which air is supplied with steam and vulcanized will be described. In FIG. 1, a vulcanizing can 1, a steam supply pipe 2, a compressed air supply pipe 3, and a plurality of steam ejectors 20, 21 as a sealed container constitute a steam vulcanizer.
[0010]
The vulcanizing can 1 has a horizontally long cylindrical shape and a shelf 4 on which an unvulcanized material such as a rubber roll (not shown) 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 an unvulcanized product is placed on the shelf 4.
[0011]
A valve 6 and a control valve 7 are attached to the steam supply pipe 2 connected to the steam source. A plurality of steam ejectors 20, 21 connected to the steam supply pipe 2 are disposed above the vulcanizing can 1. Each of the steam ejectors 20 and 21 includes suction chambers 22 and 23 and diffusers 24 and 25 each having a nozzle built therein. The outlet sides of the diffusers 24 and 25 communicate with the inside of the vulcanizing can 1 through outlet pipes 26 and 27.
[0012]
The suction chambers 22 and 23 and the inside of the vulcanizing can 1 are communicated with each other through communication pipes 28 and 29. The communication pipe 28 communicates with the upper portion of the vulcanizing can 1, while the communication pipe 29 communicates with the side portion of the vulcanizing can 1.
[0013]
The inlet sides of the suction chambers 22 and 23 are connected to the steam supply pipe 2 via on-off valves 30 and 31. Steam supplied from the steam supply pipe 2 to the steam ejectors 20, 21 passes through the nozzles in the suction chambers 22, 23 and sucks the fluid in the vulcanizing can 1 through the communication pipes 28, 29. And are supplied into the vulcanizing can 1 from the outlet pipes 26 and 27.
[0014]
The on-off valves 30 and 31 can be arbitrarily and automatically opened and closed by an open / close control unit (not shown) as electromagnetic valves or electric valves.
[0015]
In the present embodiment, only one outlet pipe 26, 27 is connected to the vulcanizing can 1. However, in order to make it easy for steam to reach the entire vulcanizing can 1, the outlet pipe 26 is provided. , 27 can be plural.
[0016]
Further, in this embodiment, an example in which only one communication pipe 28, 29 communicating the suction chambers 22, 23 of the steam ejectors 20, 21 and the inside of the vulcanizing can 1 is used, but each communication pipe 28, It is possible to further promote the convection of the steam and the compressed air in the vulcanizing can 1 by connecting a plurality of portions 29 of the vulcanizing can 1 and the suction chambers 22 and 23 with 29 as a plurality. The communication pipes 28 and 29 and the outlet pipes 26 and 27 can be extended to the inside of the vulcanizing can 1 to communicate with each other.
[0017]
In this embodiment, an example in which two steam ejectors 20 and 21 are attached is shown, but two or more steam ejectors 20 and 21 can be attached depending on the amount of unvulcanized material or the size of the vulcanized can 1. .
[0018]
A compressed air supply pipe 3 is connected to the upper part of the vulcanizing can 1. The compressed air supply pipe 3 is connected to the inside of the vulcanizing can 1 through a valve 9 and a control valve 10.
[0019]
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 and 10 and the open / close valves 30 and 31 via the open / close control unit. Each valve 7, 10, 30, 31 can be fully closed, or the valve opening can be increased or decreased to adjust the passage of steam or compressed air to control the respective partial pressures. Is something that can be done.
[0020]
Similarly, the temperature sensor 13 is electrically connected to the control valve 7 and the on / off valves 30 and 31 through the on / off control unit. In the case of steam, that is, saturated steam, the pressure and temperature are uniquely determined, so that the temperature can be maintained at a predetermined value by controlling the steam pressure to a predetermined value. Therefore, in the present embodiment, the temperature sensor 13 is used auxiliary and is not necessarily required.
[0021]
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.
[0022]
When vulcanizing an unvulcanized material such as a rubber roll (not shown) placed on the shelf 4, first, 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 valve 10. Supply compressed air. When the compressed air pressure inside the vulcanizing can 1 reaches 3.2 KG, a predetermined pressure, for example, 5.0 KG of steam is supplied through the steam supply pipe 2 and the steam ejectors 20, 21 to vulcanize the can. 1, KG of steam based on the pressure difference with the compressed air is injected into 1.
[0023]
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 product in 1 is vulcanized under a pressure and temperature conditions of 5.0 KG and 130 ° C., and the unvulcanized product and steam are in direct contact with each other.
[0024]
When steam is supplied to the steam ejectors 20 and 21 from the steam supply pipe 2, the mixed fluid of the steam and compressed air in the vulcanizing can 1 is sucked in the suction chambers 22 and 23 through the communication pipes 28 and 29, It is mixed with the supplied steam and supplied into the vulcanizing can 1 from the outlet pipes 26 and 27. As described above, the steam and compressed air in the vulcanizing can 1 are sucked into the steam ejectors 20 and 21, thereby promoting the convection of the steam and the compressed air in the vulcanizing can 1.
[0025]
When supplying steam from the steam supply pipe 2 into the vulcanizing can 1, the flow of steam in the vulcanizing can 1 can be arbitrarily controlled by opening and closing the on-off valves 30 and 31 at arbitrary timing.
[0026]
For example, the on-off valve 30 is opened for 1 minute and then closed, and at the same time, the on-off valve 31 is opened, maintained for 1 minute and then closed, and then the on-off valve 30 is opened again. The flow of steam can be controlled. Then, the steam is distributed throughout the vulcanizing can 1 by arbitrarily controlling the flow of the steam.
[0027]
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 further increases, by promoting the convection with the steam ejectors 20 and 21, the steam and the compressed air can be stirred and mixed, and the variation in the temperature distribution in the vulcanizing can 1 is made smaller. be able to.
[0028]
【The invention's effect】
As described above, according to the present invention, the open / close valve is arbitrarily controlled to be opened and closed, and the steam is sequentially supplied from the plurality of steam ejectors into the container, whereby the steam other than the steam in the container and the steam present in the container. By arbitrarily convection of this fluid, it is possible to supply steam uniformly and vulcanize the entire unvulcanized material uniformly regardless of the size and shape of the container.
[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]
1 Vulcanization Can 2 Steam Supply Pipe 3 Compressed Air Supply Pipe 7 Control Valve 10 Control Valve 12 Pressure Sensor 13 Temperature Sensor 16 Condensate Exclusion Pipe 20, 21 Steam Ejector 22, 23 Suction Chamber 24, 25 Diffuser 26, 27 Outlet Pipe 28 , 29 Communication pipe 30, 31 Open / close valve

Claims (1)

When unvulcanized rubber is placed in a sealed container and steam is supplied into the container to vulcanize the unvulcanized material, multiple steam ejectors are connected to the steam supply pipe via on-off valves. Then, by communicating the outlet side of the plurality of steam ejectors with the inside of the sealed container, and by connecting the suction chambers of the plurality of steam ejectors with the inside of the sealed container, a part of the fluid in the sealed container with the steam ejector A steam vulcanizing apparatus that promotes convection of a fluid in a container by sucking and supplying the same together with steam into the container.

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