JPS6330125B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for a roll used to knead a rubber-like material, and more particularly to a cooling device for a roll that suppresses an increase in the surface temperature of a kneading roll during a kneading operation. .

Conventionally, as a method for cooling this type of bored roll, for example, as shown in FIG. A cooling method is employed in which the cooling water is jetted out from the opening 3 through the cooling pipe 2 and the cooling water is circulated through the space 4 between the cooling pipe 2 and the inner wall surface 1a of the roll 1, or as shown in FIG. A system is known in which a plurality of spray nozzles 5 are attached to the inner wall surface 1a of the roll 1 at predetermined intervals in the middle of the pipe 2.

However, in the case of the former method, the cooling water jetted from the small diameter space x of the roll 1 to the central large diameter space X remains as stagnation in this central large diameter space X, and the roll It was difficult to effectively suppress the rise in surface temperature in the central portion of No. 1. On the other hand, although the cooling efficiency on the jetting side of the cooling water is good, there is a problem in that the temperature of the cooling water rises on the inflow side of the cooling water, resulting in a low cooling effect.

In the case of the latter method, the spray nozzle 5
As a result, the cooling water can be sprayed over the entire inner wall surface 1a of the roll 1, but the spray nozzle 5
Since there is a distance from the inner wall surface 1a of the roll 1 to the inner wall surface 1a of the roll 1, the cooling water filling the roll 1 acts as a resistance and the cooling water jetted from the spray nozzle 5 does not reach the inner wall surface 1a of the roll 1. Not only is it difficult to effectively suppress the rise in surface temperature at the center of the roll 1, but it is also difficult to efficiently cool the roll 1. In addition, the inner wall surface 1a of the roll 1
It is also possible to raise the height of the spray nozzle 5 in order to spray the cooling water from the vicinity of the roll 1.
There was a problem in that the roller came into contact with the opening 1b of the roll 1, making the assembly work difficult.

As described above, all conventional cooling devices have low cooling effects and are insufficient to suppress the rise in roll surface temperature.

Furthermore, drilled rolls with high cooling effects are expensive and have been economically problematic.

This invention was devised by paying attention to such conventional problems, and its purpose is to suppress the increase in the surface temperature of the roll by jetting cooling water directly onto the inner wall surface of the roll, and to The present invention provides a roll cooling device that can improve the cooling efficiency of the rolls and improve the workability of assembling cooling water pipes.

In order to achieve the above object, the present invention cools the roll by inserting a cooling water pipe into the hollow cylindrical roll and injecting cooling water from the cooling water pipe onto the inner wall surface of the roll. In the roll cooling device, a flexible cooling water injection hose is provided in the cooling water spout portion of the cooling water pipe disposed inside the roll in close proximity to the inner wall surface of the roll. This is a summary.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5 of the accompanying drawings.

Note that the same components as those of the conventional example explained in FIGS. 1 and 2 are designated by the same reference numerals, and the explanation thereof will be omitted.

In FIG. 3, reference numeral 1 denotes a hollow cylindrical bored roll (hereinafter referred to as roll) with one end closed, and approximately in the center of this roll 1 there is a wall extending from the other end opening 1b toward one end. A cooling water pipe 2 is inserted. The tip of the cooling water pipe 2 is closed, and a plurality of cooling water spouting hoses 6 of a predetermined length are installed at predetermined intervals and toward the inner wall 1a of the roll 1 midway inside the roll 1. It is being The injection hose 6 is made of a flexible material having a predetermined rigidity, and its base end is attached to the mouthpiece 8 of the cooling water spout 7 provided in the cooling water pipe 2 .

A rotary joint 9 that covers the cooling water pipe 2 is attached to the opening 1b at the other end of the roll 1, and defines an inflow passage 10 and an outflow passage 11 of the cooling water.

When assembling the cooling device for the roll 1 configured as described above, first, a jet hose made of a flexible material is attached to the mouthpiece 8 of the cooling water spout 7 provided at a predetermined interval on the cooling water pipe 2. 6 are attached, and are inserted toward one end of the roll 1 from the other end opening 1b as shown in FIG. At this time, since the injection hose 6 is made of a flexible material as described above, the other end opening 1b is attached to the roll 1.
In the small diameter portion 6a, the roll 1 is curved.
The roll 1 is inserted while sliding on the inner wall surface of the roll 1, and elastically returns to its original upright state at the central large diameter portion 6b of the roll 1. At this time, each injection hose 6
The tip of the roller 1 is in close proximity to the inner wall surface 1a of the roll 1, so that cooling water is directly injected onto the inner wall surface 1a of the roll 1, thereby suppressing an increase in the surface temperature of the roll 1.

Further, the cooling water that has cooled the roll 1 is discharged to the outside through the space 4 between the cooling water pipe 2 and the inner wall surface 1a of the roll 1.

As described above, the cooling water flows through the roll 1 while refluxing.
This is to cool the inner wall surface 1a of.

As described above, the present invention provides a roll that cools the roll by inserting a cooling water pipe into the hollow cylindrical roll and injecting cooling water from the cooling water pipe onto the inner wall surface of the roll. In the cooling device, a flexible cooling water injection hose is provided at the cooling water spout part of the cooling water pipe disposed inside the roll in close proximity to the inner wall surface of the roll, so that the following problems occur. It has excellent effects.

(i) Since the cooling water is ejected from a position close to the inner wall surface of the roll, a high cooling effect can be obtained with relatively low water pressure and a small flow rate.
Therefore, it is an extremely effective cooling device for keeping the roll surface temperature low at all times, and has a large energy saving effect compared to conventional devices.

(ii) Compared to conventional equipment, it is possible to obtain a uniform roll surface temperature distribution, which is extremely effective in maintaining uniform properties of the workpiece on the roll, which is especially required in the case of calendering, for example. Effective.

(iii) The structure and assembly workability are good, and there is an effect that not only can it be installed on a new roll, but also an existing roll cooling device can be simply and easily modified to the device of the present invention.

(iv) In the past, very expensive drilled rolls were used especially when it was necessary to keep the roll surface temperature low or when uniformity of the roll surface temperature distribution was required, but this inexpensive device can do the same. It can be effective.

(v) The device of the present invention is particularly used as a cooling device for kneading rolls for rubber-like materials, but it can also be used for other systems such as calender rolls. Furthermore, it can also be used when it is necessary to maintain the roll surface temperature uniformly and at a constant temperature by circulating hot water.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional views of a conventional roll cooling device, FIG. 3 is a longitudinal sectional view of a cooling device embodying the present invention, and FIG. 4 is a sectional view taken along the line - in FIG. FIG. 5 is a cross-sectional view showing the process of assembling the cooling water pipes. 1... Roll (bored roll), 1a... Inner wall surface, 2... Cooling water pipe, 6... Injection hose,
7... Cooling water spout.

Claims (1)

[Claims] 1. A roll cooling device that cools the roll by inserting a cooling water pipe into a hollow cylindrical roll and injecting cooling water from the cooling water pipe onto the inner wall surface of the roll. 1. A roll cooling device, characterized in that a flexible cooling water injection hose is provided at a cooling water spout portion of a cooling water pipe disposed inside the roll in close proximity to an inner wall surface of the roll.