JPS5936769A - Roll apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to an improvement in a roll device.

The conventional roll device will be explained with reference to FIGS. 1 and 2. (a
) is maintained at e.g. 200°C, (b
) is maintained at, for example, 100°C or less by means of circulating lubricating oil, etc., and at the same time the lower roll (low temperature roll) is in contact with the heat roll (a) with uniform linear pressure; A bearing rotatably supports the heat roll (a), (
d) is a bearing that rotatably supports the lower roll (b), (e) is a load that provides the uniform linear pressure, and the electric motor (
(not shown) is transmitted to the upper heating roll (a), the heating roll (a) rotates in the direction of arrow (A), and at the same time the lower roll (b) is being rotated by the heating roll (a). Either the rotation of the electric motor is transmitted to each of the rolls (a) and (b), and the rotation of the electric motor is transmitted to the rolls (a) and (b).
a) and (b) rotate in the above directions.

In the roll device, heat is transferred from the upper hot roll (a) to the lower cold roll (b). At this time, if the lower low-temperature roll (b) begins to deform due to some reason, the deformed part will come into strong contact with the heat roll (a), and a large amount of heat will be transferred from this part to the lower low-temperature roll (b). This causes a vicious cycle in which the deformation is accelerated and the runout of the lower low-temperature roll (b) increases.

The present invention addresses the above-mentioned problems, and includes one heated roll and another roll that rotates in contact with the heated roll with uniform linear pressure, and includes The purpose of the roll device is to provide an improved roll device that can prevent rotational runout caused by thermal strain in the low-temperature roll. It is in.

Next, the roll device of the present invention will be explained with reference to an embodiment shown in FIGS. 3, 4, and 5. (1) is the upper heated roll maintained at, for example, 200°C, and (2) is the lubricating oil circulating inside. The lower roll (
(3) is a bearing that rotatably supports the upper heat roll (1), and (4) is a bearing that rotatably supports the lower roll (2).
) is a bearing that rotatably supports the load, and (5) is a load that applies the above-mentioned uniform linear pressure, and a cylinder or the like is used for this. Further, (7) is a groove for absorbing thermal strain provided in the entire area or a part of the outer circumferential surface of the lower roll (2). In FIG. 3, the groove (7) has a spiral shape, but headband-shaped grooves may be provided in parallel at intervals, and the shape of the groove (7) is not particularly limited.

Next, the operation of the roll device will be explained. The rotation of an electric motor (not shown) is transmitted to the upper heat roll (a), and the heat roll (1) rotates in the direction of arrow (A), and at the same time, the lower roll (2) rotates in the direction of the heat roll (1). ) and rotate in the direction of arrow (B), or the rotation of the electric motor is transmitted to each of the rolls (1) and (2), and the rotation of the motor is transmitted to each of the rolls (1) and (2) and rotates in the direction of arrow (B).
2) is rotating in the above direction, the heat from the upper heat roll (1) is transferred to the groove (
7) Since the heat is only transmitted from the protrusion between the two to the lower roll (2), the heat input to the roll (2) is reduced. Moreover, the heat that enters the roll (2) is immediately dissipated from the grooves (7) on both sides of the protrusion, so it is difficult to be transmitted further inside.
Thermal distortion of the roll (2) is prevented as much as possible.

In this way, in the roll device of the present invention, the heat input from the heat roll (1) to the low-temperature side roll (2) is reduced, and heat dissipation is promoted in the low-temperature side roll (2). Since thermal distortion is prevented as much as possible, there is an effect that rotational runout caused by thermal distortion of the roll (2) can be prevented.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. . For example, the groove (7) of the low temperature side roll (2)
When the shape of the roll is spiral, the mating roll (thermal roll) can be cleaned when this roll device is used in an embossing machine for nonwoven fabrics. Further, in the embodiment described above, the heat roll is on the upper side and the low temperature side roll is on the lower side, but the vertical positions of the respective rolls are not limited to this example.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional roll device, and Figure 2 is a front view of a conventional roll device.
FIG. 3 is a front view showing an embodiment of the roll device according to the present invention; FIG. 4 is a longitudinal side view taken along the line ■-■ in FIG. 6. , Figure 5 is the arrow view in Figure 4 ■
It is a longitudinal sectional front view along the line -■. (1)... One heat roll, (2)... The other roll, (7)... Groove for absorbing thermal strain.

Claims (1)

[Claims] It has one heated roll and another roll that rotates in contact with the heated roll with uniform linear pressure, and a groove for absorbing thermal strain is provided in the entire or part of the outer peripheral surface of the other roll. Featured roll device