JPH0568616U - Rubber processing roll - Google Patents

Abstract

(57) [Abstract] [Purpose] It is intended to provide a rubber processing roll capable of preventing the occurrence of burning of an edge portion of a rubber sheet and capable of processing a wide or thick rubber sheet to a uniform quality. [Structure] On an inner peripheral surface of a cylindrical roll 1, a plurality of annular chambers 2 which are partitioned in parallel in the axial direction and form spaces independent from each other are provided, and the temperature of each of the annular chambers 2 is controlled independently of each other. It is characterized in that the medium supply paths are connected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rubber sheet processing roll, and more particularly, to a rubber processing roll capable of adjusting temperature distribution in the roll axial direction.

[0002]

[Prior Art]

 As a rolling roll for rolling an unvulcanized rubber sheet, a cylindrical roll is used that is capable of uniformly circulating the surface temperature by forcibly circulating a heated or heated heat medium. .. On the other hand, the rubber sheet rolled by this rolling roll has uneven shape and thickness variation at both ends (ears), so both ends are cut off after rolling and processed into a sheet with constant width and constant thickness. It is supposed to be done. The ears cut off in this way are returned to the rolling rolls again, mixed, and processed into a new rubber sheet.

However, when the rubber sheet is rolled by the above-mentioned rolling roll, since the ears are also heat-treated, so-called scoring may occur in the ears, and this can be reused for the rubber sheet. There was a problem that uneven quality occurred in such a rubber sheet and the commercial value was lowered. Further, when a wide rubber sheet having a thickness of 1000 mm or more or a thick rubber sheet having a thickness of 8 mm or more is rolled by the above-mentioned rolling rolls, just controlling the surface temperature of the rolls causes variation in the thickness. There was something.

[0004]

[Problems to be solved by the device]

 An object of the present invention is to provide a rubber processing roll capable of preventing the above-mentioned burning of the edge portion of the rubber sheet and processing a wide or thick rubber sheet to a uniform quality. ..

[0005]

Means for Solving the Problems A roll for rubber processing according to the present invention that achieves the above-mentioned object is provided with a plurality of inner peripheral surfaces of a cylindrical roll, which are divided in parallel in the axial direction and form spaces independent of each other. It is characterized in that an annular chamber is provided, and a heating medium supply path whose temperature is controlled independently is connected to each of the annular chambers.

In this way, on the inner peripheral surface of the cylindrical roll, a plurality of annular chambers arranged in parallel in the axial direction and independent from each other are provided, and the heating medium whose temperature is controlled independently is supplied to each of the roll surfaces. The temperature distribution in the axial direction of can be arbitrarily controlled. Therefore, for example, by controlling the temperature of the surfaces of both ends of the roll to a low temperature, it is possible to prevent burning of the ears of the rubber sheet. If the temperature is finely adjusted, the entire rubber sheet can be rolled uniformly.

[0007]

【Example】

 In FIG. 1, a cylindrical roll 1 is provided with an annular chamber 2 which is divided into five sections in parallel in the axial direction on the inner peripheral surface. Each of the annular chambers 2 forms a space independent of each other by a partition wall 2a, and a supply pipe 5 for supplying a heat medium is connected to each inner peripheral wall thereof, and a large number of discharge holes 6 are provided. The supply pipes 5 overlap each other concentrically at the axial center of the roll 1 while being independent of each other, and are connected to rotary joints 4 provided at both left and right ends of the roll 1. A plurality of supply pipes 7 for supplying heat medium are connected to the rotary joints 4 at both ends, and a discharge pipe 8 is connected to the rotary joint 4 on one side.

The rotary joint 4 is composed of an inner tube and an outer tube that are rotatable relative to each other, and the heat medium supplied from each of the stationary outer supply tubes 7 is rotated by each inner supply tube. 5 is supplied while maintaining an independent state from each other. The plurality of supply pipes 7 are each supplied with a heat medium whose temperature is controlled independently by an external temperature control unit. The heat medium discharged to the center of the roll from the discharge holes 6 of the annular chambers 2 is collected and discharged from the discharge pipe 8 provided on one side of the rotary joint 4.

As the heat medium to be supplied to the rubber processing roll, for example, steam is the most preferable heat medium, and the temperature control method is to easily mix water with steam and adjust the mixing ratio thereof. It can be carried out. The method for adjusting the temperature of the heat medium is not particularly limited. When rolling the unvulcanized rubber sheet using the above rubber processing roll, as shown in FIG. 1, the surface of the roll 1 is contacted with the rubber sheet S so as to cover the entire five annular chambers 2. Then, the temperature-controlled steam at a low temperature (for example, about 70 to 120 ° C.) is supplied to the annular chambers 2 at both ends. By thus keeping the temperature of the annular chambers 2 at both ends low, the ears of the rubber sheet S are not burned by heating, and are newly processed even if they are reused after being cut off. There is no unevenness in quality.

The number of the annular chambers 2 is not particularly limited, but 5 to 6 is sufficient if a general unvulcanized rubber sheet is treated. However, the larger the number, the easier the adjustment of the temperature distribution in the roll axis direction. In addition, when the number of annular chambers 2 is set to a very large number, it is possible to adjust the temperature distribution to obtain a wide rubber sheet with a width of 1000 mm or more, or even a thick rubber sheet with a thickness of 8 mm or more. It is possible to perform uniform rolling without causing

In addition, in the above-mentioned embodiment, the case where it is used as a rolling roll has been described, but the rubber processing roll of the present invention is not limited to the rolling roll, and may be used for other processing applications such as a kneading roll. Applicable. Further, in the above embodiment, the case of the heat treatment is explained, but the rubber processing roll of the present invention can be applied to the case of the cooling treatment of the rubber sheet.

[0012]

[Effect of the device]

 As described above, according to the present invention, a plurality of annular chambers that are arranged in parallel in the axial direction and are independent from each other are provided on the inner peripheral surface of the cylindrical roll, and the heating medium whose temperature is controlled independently is supplied to each of them. Therefore, the temperature distribution in the axial direction on the roll surface can be controlled arbitrarily. Therefore, for example, by controlling the temperature of both ends of the roll surface to a low temperature, it is possible to prevent the selvages of the rubber sheet from burning, and even with a wide or thick rubber sheet, the temperature of each annular chamber can be finely controlled. If it is adjusted, the entire rubber sheet can be rolled uniformly.

[Brief description of drawings]

FIG. 1 is a schematic view showing an axial cross section showing an embodiment of a roll of the present invention.

[Explanation of symbols]

 1 Roll 2 Annular Chamber 2a Partition Wall 4 Rotating Joint 5, 7 Supply Pipe 6 Discharge Hole 8 Discharge Pipe

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location // B29K 21:00 B29L 7:00 4F

Claims (1)

[Scope of utility model registration request] 1. An inner peripheral surface of a cylindrical roll is provided with a plurality of annular chambers that are partitioned in parallel in the axial direction and form spaces independent of each other, and these annular chambers are independently heat-controlled. A rubber processing roll with connected supply paths.