JPH0123294B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a continuous vulcanization apparatus for sheet rubber.

There is a device that continuously vulcanizes rubber sheets by transporting the rubber sheet into and out of the vulcanizer body on a belt conveyor, and vulcanizing the rubber sheet within the body under appropriate pressure and temperature. . Conventionally, a belt wound by a turret method or the like is used as this conveyor belt, and this belt is fed into the main body together with a rubber sheet from the entrance of the main body, and when the excess belt of the winding roll becomes low, the belt of a new roll is connected. This allows continuous vulcanization of the long rubber sheet. However, this method has the disadvantage that it requires a lot of time and manpower for maintenance, management, etc., and increases operating costs. Additionally, if the conveyor belt is endless, the conveyor belt will frequently go in and out of the main body, shortening the belt's lifespan, making it necessary to replace the conveyor belt, and thus requiring the equipment to stop operating. The disadvantage is that it cannot be operated continuously for a long period of time. In addition, when a rubber sheet is placed on a conveyor belt and passed through the main body, there is a problem that dust may adhere to the surface of the rubber sheet that is not in contact with the belt, and the surface roughness of the front and back surfaces of the rubber sheet There is a disadvantage that a uniform product cannot be obtained due to the difference in the

This invention was made to solve these conventional drawbacks, and by using a pair of long endless belts, it is possible to operate continuously for a long period of time, and it also creates a uniform rubber sheet. It is designed so that it can be obtained.

Embodiments of the present invention will be described below with reference to the drawings. In Figures 1 and 2, 1 is a vulcanization can, into which steam or heated air is blown.
It is configured to maintain a temperature and pressure suitable for vulcanizing the rubber sheet. Vulcanized can (equipment body)
A pair of upper and lower rolls 3, 4 are arranged at the introduction side end of the roller 1, and sprockets 31, 41 are coaxially provided on the shafts 30, 40 of each roll 3, 4, respectively. Further, a drive sprocket 71, a sprocket 51, and a tension sprocket 8, which are coaxial with the drive motor 7, are arranged below, and the chain 5 is stretched between these sprockets. Tension sprocket 8 is an extendable shaft 8
0, and by the expansion and contraction of this axis, the chain 5
The tension sprocket 8 is pressed against the chain 5 so that the chain has a predetermined tension.

Reference numeral 16 denotes an operating handle, which allows the upper roll 3 to be moved up and down to adjust the gap between the rolls 3 and 4. A slit 10 is formed at the end of the vulcanization can 1, and the rubber sheet 2 is sandwiched between a pair of upper and lower conveyor belts 9, and the rubber sheet 2 is held and transported by the rolls 3 and 4 via the conveyor belt 9. and is fed into the vulcanization can 1 through the slit 10. The lead-out side end of the vulcanization can 1 is similarly constructed, and the rubber sheet 2 is sandwiched between a pair of upper and lower rolls 3 and 4 and led out via a conveyor belt 9.

The lower conveyor belt 9 reaches a conveyor roll 94 via a tension roll 91, a dancer roll 70, and a tension roll 92 on the outlet side. A weight 72 is connected to the dancer roll 70, and the weight 72 applies necessary tension to the conveyor belt 9. A plurality of conveyor rolls 94 and 93 are arranged near both ends of the vulcanizing can 1, respectively, and a conveyor belt 9 is stretched between the conveyor rolls 94 and 93 so as to reciprocate between them a plurality of times. I have to. The conveyor belt 9 passes through the lowermost conveyor roll 93, passes through tension rolls 92 and 91, and reaches between the introduction rolls 3 and 4.
Although illustration of the upper conveyor belt 9 is omitted, it is configured similarly to the lower conveyor belt.

Between the conveyor rolls 93 and 94, legs 11 for the vulcanizing can 1 are provided at appropriate intervals as shown in FIG. 15 is attached, and by supporting the belt 9 with this roll 15, the belt 9 is prevented from being bent and is moved smoothly.

The approximately middle portion of the conveyor belt reciprocating between the conveyor rolls 93 and 94 is wrapped around the roll 61 of the tension roll device 6. As shown in FIGS. 6 and 7, this tension roll device 6 is movable along guide rails 60 on both sides, and is pulled by a winch (not shown) via a wire rope 62, thereby causing the roll to roll. Appropriate tension is applied to the conveyor belt 9 stretched across the conveyor belt 61.

Reference numeral 50 denotes a meandering correction device, which prevents the belt 9 from twisting sideways by sandwiching the conveyor belt 9 between a pair of upper and lower rolls and guides the belt 9 to a fixed position.

By configuring the pair of upper and lower conveyor belts 9 to be endless and long in this way, operation can be continued for a long period of time and can be automated, thereby achieving significant labor savings. In addition, a long conveyor belt is conveyor roll 93,
By reciprocating between the tension rolls 91 and 94, the tension rolls 91, 92
Dancer roll 70 and tension roll device 6
By arranging the conveyor belt 9, tension is applied uniformly to the conveyor belt 9, so that the belt runs smoothly.

The introduction and outlet portions of the vulcanization can 1 are constructed in a sealed structure, as shown in FIGS. 3 and 4. The operating handle 16 has a shaft 64 screwed into a bearing 66 fixedly provided on the vulcanizing can 1, and a bearing 69 for the roll shaft 30 is moved up and down as the screw advances due to the rotation of the operating handle 16. , the gap between the rolls 3 and 4 is adjusted. The rolls 3, 4 have rubber linings 34, 4 on the outer peripheral surfaces of their outer cylinders 32, 42.
4, and flanges 33, 43 are removably attached to both sides.
As shown in FIG. 4, a cylindrical wall consisting of an upper wall 75, a lower wall 76, and both side walls 74 is inserted between the rolls 3, 4 and the end wall 11a of the vulcanization can with a slit 10.
It is provided so as to protrude from the end wall 11a so as to surround it. A seal plate 88 and a retaining plate 81 for holding the seal plate 88 are attached to the upper wall 75 and the lower wall 76 by bolts 82, respectively. The hole through which the bolt 82 passes is an elongated hole so that the seal plate 88 and the holding plate 81 can move forward and backward in the roll direction.
Further, a bracket 85 is provided on each of the upper wall 75 and the lower wall 76, and a push bolt 83 is screwed onto the bracket. It is designed so that it can be crimped. The seal plate 88 uses a thermally expandable resin, for example, a fluororesin such as polytetrafluoroethylene. Furthermore, seal plates 98 are disposed on both side surfaces of the rolls 3 and 4 and on the outer surfaces of both side walls 74 and held by retaining plates 97 so as to close the gaps between the two.
It is crimped by a push bolt 95 attached to a fixing plate 96.

In this configuration, the rubber sheet 2 and the conveyor belt 9 sandwiching it from above and below are fed through the vulcanization can 1 at a constant speed by the introduction and output rolls 3 and 4. The rubber sheet 2 is vulcanized by applying a temperature and pressure of . Sealing in the vulcanization can 1 is performed between the introduction and exit portions of the rubber sheet 2, the rolls 3 and 4, and the upper and lower side walls 75, 76, 74. That is, the upper and lower surfaces are the seal plates 8
8 is press-fitted to the outer peripheral surfaces of the rolls 3 and 4, and both sides are sealed by sealing plates 98 that are press-fitted to both side surfaces of the rolls 3 and 4 and the side walls 74. Both ends of the rolls 3 and 4 are likely to wear out due to the rubber sheet 2 passing through the center.
Since both ends are comprised of removable flanges 33, 43, when these parts are worn out, there is no need to adjust the whole, and only the flanges 33, 43 need be adjusted. Furthermore, wear of the seal plates 88 and 98 can be easily adjusted using the push bolts 83 and 95.

As shown in FIG. 8, the rotational force to the introduction and output rolls 3 and 4 is transmitted from drive motors 52 and 53 to tacho generators 54 and 55 and variable speed coupling 3, respectively.
8 and 39, and the speed is set by speed setters 45 and 46. Further, the rotational speed of each roll 3, 4 is transmitted from pulse oscillators 56, 57 to rotation detectors 58, 59, and is displayed by digital tachometers 47, 48, respectively. 99 is an ampere meter, 35 is an individual setting device on the introduction side, 36
is a single setter on the derivation side.

In this way, the input and output rolls 3 and 4 are provided with speed setting means and speed detection means, respectively, and the rotation of the rolls 3 and 4 on the output side is set to be slightly faster than that on the introduction side, and both rolls are The rotation speed is detected and fed back so that the rotation ratio of 3 and 4 is always maintained at the set value. The rotation ratio of both rolls on the entrance and exit sides should be approximately 105:100. In this way, the conveyor belt 9 and the rubber sheet 2 are given an appropriate tension in the vulcanization can 1, which prevents wrinkles from forming on the rubber sheet 2, and because they move at a constant speed, uniform vulcanization is achieved. Ru.

Further, as shown in FIG. 9, a steam pipe 21 is disposed inside the vulcanization can 1, and this steam pipe 21 is connected to a steam supply source 20 via a steam valve 23 outside the vulcanization can 1. The other end of 21 is taken out of the vulcanization can 1, and a drain trap is provided at an appropriate position. The steam pipes 21 in the vulcanization can 1 are arranged separately on both the upper and lower sides of the rubber sheet 2, and are also arranged longitudinally into three regions.
The purpose of dividing the rubber sheet 2 into upper and lower sides is to ensure that heat is evenly applied to the rubber sheet 2 from the front and back, and for this purpose, a large number of small holes are formed in each of the upper and lower conveyor belts 9. The reason for dividing the pipe in the length direction is to prevent thermal deformation and bending in the length direction when long pipes are used. This is because if a control valve is provided in each zone, the temperature can be controlled for each divided zone. Therefore, the number of divisions in the length direction may be determined depending on conditions such as the length of the vulcanization can and division control.

Further, a heated air supply pipe 27 is arranged in the vulcanization can 1, and this supply pipe 27 is connected to a heated air supply source 29 via a pressure reducing valve 28. 26 is a control means, which includes a temperature sensor 2 placed in the vulcanization can 1;
The steam valve 23 is controlled by the signal 6a.

In this configuration, the rubber sheet 2 and the conveyor belt 9 are passed through the vulcanization can 1 at a constant speed by the introduction roll, and during this time, heat is radiated from the steam pipe 21 in the vulcanization can 1 and the supply pipe 27 Heated air is blown into the vulcanization can 1, thereby maintaining the inside of the vulcanization can 1 at a predetermined temperature and pressure, and vulcanization is carried out. The inside of the vulcanization can 1 is not heated by directly blowing steam, but is indirectly heated by heat radiation from the outer circumference of the steam pipe 21, so the heating air pressure does not need to be very high, and the The minimum amount of pressure needed to push out the air inside the rubber sheet is sufficient. Therefore, the pressure resistance of the vulcanization can 1 may be small, and the vulcanization can 1
can be made lightweight. Also, as the internal pressure decreases, the seal structure becomes simpler, and the rubber sheet 2
It is also easy to vulcanize while continuously moving. Furthermore, temperature control can be carried out reliably as the temperature in the vulcanization can 1 is detected and the amount of steam supplied is controlled by a control means, ensuring a uniform product with no uneven vulcanization. I can get it.

Furthermore, since the rubber sheet 2 moves in the vulcanization can 1 with the conveyor belt 9 in close contact with its front and back surfaces, dust is prevented from adhering to it during vulcanization.
In addition, the front and back sides are subjected to the same conditions, resulting in a uniform product. Furthermore, since the paper passes between the lead-in and take-out rolls 3 and 4 with its front and back surfaces covered by the conveyor belt 9, the problem of rubber adhesion to the rolls 3 and 4 is also solved.

As explained above, the present invention is an apparatus for continuously vulcanizing rubber sheets in a vulcanization can, in which the conveyor belt is composed of a pair of upper and lower long endless belts, thereby allowing continuous operation. This is something that can be done automatically. Vulcanization is performed under the same conditions on both sides, and by applying uniform tension to the long endless belt, stable running of the belt is possible, and uniform vulcanization of the rubber sheet is made possible. This also achieved labor savings during operation.

[Brief explanation of drawings]

Fig. 1 is a front view of an apparatus showing an embodiment of the present invention, Fig. 2 is a left side view thereof, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a sectional view taken along the - line in Fig. 2. , FIG. 5 is a front view of the support roll at the intermediate position of the conveyor belt, FIG. 6 is an enlarged front view of the tension roll device, FIG. 7 is its plan view, FIG. Figure 9 is an atmosphere control system diagram inside the vulcanization can. 1... Vulcanized can, 2... Rubber sheet, 3, 4...
Lead-out/in/out roll, 6...Tension roll device, 9
... Conveyor belt, 70 ... Dancer roll, 9
1,92...Tension roll, 93,94...
conveyor roll.

Claims (1)

[Claims] 1. A rubber sheet to be vulcanized extruded from an extruder is continuously transferred into the main body of a continuous vulcanizer by a transfer mechanism, and continuously vulcanized by a vulcanizing medium supplied into the main body of the vulcanizer. In the continuous vulcanization apparatus configured to perform vulcanization, the transfer mechanism includes a pair of upper and lower endless belts and a roll mechanism that clamps the endless belts at the entrance and exit portion of the main body and introduces them into and out of the main body, and the endless belts It moves inside the main body with a rubber sheet sandwiched between them, and outside the main body, it reciprocates by passing it between a plurality of conveyor rolls placed near both ends of the main body at the upper and lower parts of the main body. A continuous vulcanizing apparatus for sheet rubber, characterized in that a dancer roll device and a tension roll device are arranged to apply uniform tension to each endless belt.