JP2003053740A - Steam vulcanization apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a steam vulcanization apparatus which can vulcanize a whole unvulcanized article uniformly by supplying steam uniformly to a whole container irrespective of the size and shape of the container. SOLUTION: A steam supply pipe 2 and a compressed air supply pipe 3 are connected to a closed vulcanization can 1. Spray nozzles 22-26 are set in the vulcanization can 1 by the end of the steam supply pipe 2. Valves 32-36 are fitted to the inlets of the spray nozzles 22-26. By supplying steam of a prescribed pressure and compressed air into the vulcanization can 1, vulcanization is done under an optional pressure corresponding to each partial pressure and at an optional temperature. The flow of the steam to be supplied into the vulcanization can 1 can be controlled by controlling the opening/closing of the valves 32-36 so that temperature distribution in the vulcanization can 1 can be made uniform.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for vulcanizing an unvulcanized product with steam, and more particularly, to heating an unvulcanized product as a whole at a uniform predetermined temperature. As a result, the present invention relates to a steam vulcanizing apparatus capable of uniformly vulcanizing the entire unvulcanized product. 2. Description of the Related Art As a conventional steam vulcanizing apparatus, for example, an apparatus for vulcanizing a rubber roll is disclosed in Japanese Patent Application Laid-Open No. 50-3483. In this method, a rubber material is rolled into a sheet, laminated around a core material, and then vulcanized by supplying hot steam from the pipes 5 and 12 into the core material. [0003] In the above conventional device,
Since heat steam is simply supplied through a pipe into the core material cavity, the heat steam does not spread evenly and uniformly throughout the core material cavity, and the entire unvulcanized product cannot be uniformly vulcanized. was there. In particular, when the volume of the cavity portion is large or the shape is complicated, the heat steam often does not spread all over and uniformly. Accordingly, an object of the present invention is to provide a method for uniformly supplying steam to the entire container, regardless of the size and shape of the container, so that the entire unvulcanized product is uniformly vulcanized. The purpose is to obtain a steam vulcanizing device that can be vulcanized. [0005] Means taken to solve the above problem is to arrange an unvulcanized rubber material in a closed container, and to supply steam from a steam supply pipe into the container. In the vulcanizing method for supplying and vulcanizing an unvulcanized product, a plurality of spray nozzles are attached to a container side end of a steam supply pipe, and an opening / closing valve is provided on an inlet side of the plurality of spray nozzles. A plurality of spray nozzles are attached to an end of a steam supply pipe on a container side via an on-off valve, so that the on-off valve is arbitrarily opened and closed, and the plurality of spray nozzles are sequentially started from the plurality of spray nozzles. By supplying steam into the container, the convection of the fluid in the container can be arbitrarily controlled. [0007] By the convection of a fluid containing steam,
The steam spreads uniformly throughout the container, and the entire unvulcanized product can be uniformly vulcanized. In this embodiment, an example in which air is supplied together with steam to perform vulcanization will be described. In FIG. 1, a vulcanizing can 1 as a closed container, a steam supply pipe 2, a compressed air supply pipe 3,
And a plurality of spray nozzles 22, 23, 24, 25,
26 together form a steam vulcanizing apparatus. The vulcanizing can 1 has a horizontally long cylindrical shape and has a shelf 4 on which a rubber roll (not shown) as an unvulcanized material 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. A steam supply pipe 2 and a compressed air supply pipe 3 are connected to the upper part of the vulcanizer 1. The steam supply pipe 2 is connected to the spray nozzles 22, 23, 24 on the upper part of the vulcanizing can 1 via the valve 6, the control valve 7, and the on-off valves 32, 33, 34. The steam supply pipe 2 is branched by a branch pipe 21, and the on-off valve 35,
It is also connected to lower spray nozzles 25 and 26 via. The compressed air supply pipe 3 is connected to the vulcanization can 1 via a valve 9 and a control valve 10. In this embodiment, the spray nozzle 22
Although the example which attached a total of five to 26 above and below the vulcanized can 1 was shown, depending on the size and shape of the vulcanized can 1, only two pieces may be sufficient. It can also be attached to the left and right. The on-off valves 32 to 36 can be arbitrarily and automatically opened and closed by an on-off control unit (not shown) as electromagnetic valves or electric valves. A pressure sensor 12 for detecting the internal pressure and a temperature sensor 13 for detecting the temperature are mounted on the upper part of the vulcanizing can 1. The pressure sensor 12 is electrically connected to the control valves 7, 10 and the on-off valves 32-36 via the on-off control unit.
Each of the valves 7, 10, 32 to 36 is fully closed, or the valve opening is increased or decreased to adjust the amount of passage of steam or compressed air to arbitrarily control the respective partial pressures. Is what you can do. The temperature sensor 13 is also electrically connected to the control valve 7 and the on-off valves 32 to 36 via the on-off control unit.
Since the pressure and temperature of the 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 as an auxiliary. An atmosphere communicating pipe 15 is connected to the right side of the vulcanizing can 1 via a valve 14. Further, a condensate rejection pipe 16 for rejecting condensate in which steam is condensed to the outside is connected to a lower portion of the vulcanizing can 1. The condensate drain pipe 16 has a valve 17
And a steam trap 18 that discharges only condensate water to the outlet side
Are attached in parallel. When vulcanizing a rubber roll or the like (not shown) placed on the shelf 4, first, the control valve 1 is passed through the compressed air supply pipe 3.
0, a predetermined pressure, for example, 3.2 K
G compressed air is supplied. When the compressed air pressure inside the vulcanizing can 1 reaches 3.2 KG, the predetermined pressure, for example, 5.0, is passed through the steam supply pipe 2 and the spray nozzles 22 to 26.
By supplying KG steam, 1.8 KG steam based on the pressure difference with the compressed air is injected into the inside of the vulcanizing can 1. By supplying 3.2 KG of compressed air and 1.8 KG of steam, the pressure in the vulcanization can 1 becomes 5.0K.
G. When it reaches 5.0 KG, the valve 9 is closed and the supply of compressed air is stopped. On the other hand, the steam is continuously supplied so that the pressure in the vulcanizing can 1 maintains 5.0 KG, so that the temperature of the saturated steam of 1.8 KG becomes 13
Since the temperature is 0 ° C., the unvulcanized rubber roll in the vulcanizing can 1 is vulcanized under the conditions of 5.0 kg, a pressure of 130 ° C. and a temperature. When steam is supplied from the steam supply pipe 2 into the vulcanizing can 1, the flow of the steam into the vulcanizing can 1 is arbitrarily controlled by opening and closing the on-off valves 32 to 36 at an arbitrary timing. be able to. For example, by opening and closing the on-off valve 32 for 1 minute and then closing it, simultaneously opening the on-off valve 33, maintaining it for 1 minute and closing it, and sequentially opening and closing the on-off valves 34 to 36, The flow of steam in the vulcanizing can 1 can be controlled. For example, by opening and closing the on-off valves 32, 33, 34 for one minute and then closing and opening the on-off valves 35, 36 for one minute, Control of the steam flow. By controlling the flow of the steam arbitrarily, the steam is distributed throughout the inside of the vulcanizing can 1. When vulcanization is performed by supplying steam and compressed air into the vulcanizing can 1 as in the present embodiment, after a while, the steam and compressed air are separated into the vulcanizing can 1. However, by controlling the timing of opening and closing the on-off valves 32 to 36, the convection is promoted by the steam supplied from the spray nozzles 22 to 26, and the steam and the compressed air are stirred and mixed. In addition, variation in the temperature distribution in the vulcanizing can 1 can be reduced. According to the present invention, as described above, the on-off valve is controlled to open and close arbitrarily to supply steam from a plurality of spray nozzles to the inside of the container in sequence. By arbitrarily convection of fluids other than steam present in the container, steam can be supplied to the whole and uniformly regardless of the size and shape of the container, and the entire unvulcanized product can be uniformly dispersed. Can be vulcanized.

[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 vulcanizing can 2 Steam supply pipe 3 Compressed air supply pipe 7 Control valve 10 Control valve 16 Condensate drain pipe 22,23,24,25,26 Spray nozzle 32, 33, 34, 35, 36 on-off valve

Claims (1)

Claims: 1. An unvulcanized rubber material is placed in a closed container, and steam is supplied from a steam supply pipe into the container to vulcanize the unvulcanized material. A steam vulcanizing apparatus comprising: a plurality of spray nozzles attached to an end of a steam supply pipe on a container side; and an on-off valve provided on an inlet side of the plurality of spray nozzles.