JPH0610942A - Contact roll - Google Patents

Abstract

PURPOSE:To provide a contact roll in which the deflection of the roll is minimized because of its light weight and high rigidity, the following property of the roll to a work is satisfactory, no wrinkling is caused on a wound paper or film because of its uniform contact pressure over the whole width of the roll surface, and no air is embraced. CONSTITUTION:A contact roll has a first carbon fiber composite material layer 1, a first rubber layer 2, a second carbon fiber composite material layer 3, and a second rubber layer 4 which are laminated into a cylinder successively in the order from the inner layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention keeps a winding shape of an object to be processed in a predetermined shape by pressing it against an object to be processed wound in a winding process of paper, film, foil, etc. It relates to contact rolls used to prevent.

[0002]

2. Description of the Related Art Conventionally, a contact roll used for winding paper, film, foil, etc. has a cored bar of iron or aluminum coated with rubber, and pressure is applied to an object to be processed through journals at both ends of the roll. The method of multiplying has been used. In the case of such a method, since force is applied from both ends, the roll is deflected, pressure is applied only to the edge part of the roll surface, and almost no pressure is applied in the center part, so the winding shape of the workpiece is not flat, Become a state. In addition, in this case, wrinkles are generated, air is trapped, and the like, which is a cause of product defects. To solve this problem, the outer shape of the rubber is crowned so that the contact pressure between the contact roll and the workpiece is uniform over the entire width of the roll surface. However, it is difficult to apply a uniform pressure to the entire width of the roll surface simply by crowning the rubber surface in this way, and in particular, problems are more and more caused as the width of the roll surface becomes wider.

Further, since the material of the roll shell is also made of metal, the weight is large and the moment of inertia is also large, so that the followability at the time of starting and stopping the apparatus is poor, and the time required for a complete start-up is long. It was a problem in terms of productivity.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and because of its lightweight and high rigidity, the roll has little deflection, and the roll can follow the work well, and the roll surface It is an object of the present invention to provide a contact roll in which the contact pressure is uniform over the entire width so that the wound paper or film is not wrinkled and the air is not trapped.

[0005]

The present invention has the following constitution in order to achieve the above object.

That is, in the present invention, the first carbon fiber composite material layer, the first rubber layer, the second carbon fiber composite material layer, and the second rubber layer are laminated in this order from the inner layer in a cylindrical shape. Is a contact roll.

The present inventors have tried to use a carbon fiber composite material (hereinafter referred to as CFRP) to manufacture a lightweight and highly rigid contact roll. An index for determining the magnitude of roll weight and moment of inertia is made by comparing the specific elastic moduli of materials. When CFRP is compared with steel and aluminum, the results are shown in Table 1, and CFRP shows the point of reduction of weight and moment of inertia. You can see how good it is.

[0008]

[Table 1]

Next, as a result of extensive studies on the shape and structure of the contact roll, the present inventors have invented a roll having a unique structure as shown in FIG.

In FIG. 1, 1 is a first CFRP layer, 2 is a first rubber layer, 3 is a second CFRP layer, 4 is a second rubber layer, and these layers form a cylindrical body.
Furthermore, 5 shows the bearing and boss of the roll.

Here, 5 is bonded or mechanically bonded to the first CFRP layer 1, and a surface pressure can be applied to the object to be processed by applying a force from the bearing portion.

The first CFRP layer is required to have a particularly high elastic modulus in the axial direction and to minimize the deflection when the contact roll is pressed against the object to be treated.

Further, the first rubber layer 2 needs to be appropriately deformed against the contact pressure from the outer surface, and the contact pressure needs to be applied over the entire width of the roll surface. It has been found that the second CFRP layer 3 has an extremely small amount of deflection due to the deformation of the first rubber layer. Further, the outermost second rubber layer 4 further functions to absorb the flexure, so that the contact pressure over the entire width of the roll surface can be made extremely uniform as compared with the conventional roll.

Here, the hardness, thickness and material of the rubber used in the first rubber layer 2 and the second rubber layer 4 do not have to be the same, and they can be selected according to their respective required specifications. The hardness and wall thickness of the first rubber layer 2 are mainly important, and the second rubber layer 4 has important factors such as the coefficient of friction with the object to be treated and the releasability in addition to the hardness and wall thickness. Generally, the material of the rubber layer is different. In particular, the first rubber layer 2 needs to sufficiently absorb the deformation, and by making the hardness lower than that of the second rubber layer 4, it is possible to more exert the effect.

In the case of the present invention, the shape of the second rubber layer 4 is sufficient even if it is a straight shape, but it goes without saying that a crown shape is also possible.

[0016]

EXAMPLES The present invention will be specifically described below based on typical examples.

Example 1 In this example, a contact roll having a length of 1000 mm and an outer diameter of 100 mm used for winding a paper was manufactured. CFR
Table 2 shows the dimensions of the P layer and the rubber layer.

[0018]

[Table 2]

Next, these molding methods will be described in detail.

First, in order to mold the first and second layer CFRP pipes, iron mandrels having outer diameters of 50 mm and 75 mm, respectively, were prepared, and the filament mandrel was wound on them. After that, this was cured in a curing furnace and demolded to form a blank. The fiber used is carbon fiber Pyrofil (registered trademark) HR40 manufactured by Mitsubishi Rayon Co., Ltd. The fiber laminated structure was set as follows because it is necessary to increase the elastic modulus in the roll axial direction. That is, when the first CFRP layer was set to 90 / + 10 = 1.2 / 3.8 mm and the elastic modulus after curing was measured, E = 16500 kg / mm ²
Met. 90 / + 10 for the second CFRP layer
= 0.9 / 2.6 mm. At this time, the elastic modulus in the axial direction was E = 15500 kg / mm ² . A journal is adhered to the first CFRP layer of the element pipe thus formed, and thereafter, the outer shape of each element tube is vulcanized to polish the outer periphery of the first rubber layer, and the adhesive is applied to the outer periphery. It is embedded in the 2CFRP layer and integrated.

After that, the outer periphery of the second rubber layer was polished to finally obtain a contact roll.

The materials of the first and second rubber layers are EPD, respectively.
M and silicone rubber, each hardness JIS 40
And 50 degrees.

When the contact roll manufactured in this way was used as the contact roll of the winding part of the winder machine used in the paper manufacturing process, there was no uneven contact pressure as seen in the conventional contact roll, and the winding was performed. A product with a good take shape was obtained.

[0024]

As described in detail above, since the contact roll of the present invention uses the carbon fiber composite material, it is lightweight and has a low moment of inertia, and therefore has good followability when starting and stopping the device, Yield and productivity are improved.

Further, since the special four-layer structure is adopted, uneven contact pressure at the contact portion with the work is eliminated, and the rolled-up shape of the work becomes straight, so that a good product can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a contact roll of the present invention.

[Explanation of symbols]

 1 1st CFRP layer 2 1st rubber layer 3 2nd CFRP layer 4 2nd rubber layer 5 Bearing and boss part

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Claims (1)

[Claims] 1. A first carbon fiber composite material layer, a first rubber layer, a second carbon fiber composite material layer, and a second rubber layer are laminated in this order from the inner layer in a cylindrical shape. Contact roll.