JPH0559651A - Method for producing fiber tube for coating roll - Google Patents

Abstract

PURPOSE:To simply obtain a fiber tube for coating roll having a fixed diameter by packing a fiber composition comprising fibers, a fiber binder and an organic solvent into space between an outer and an inner cylinders to give a hollow cylinder, pressing the material and taking out. CONSTITUTION:A fiber composition 3 comprising fibers, a fiber binder and an organic solvent (preferably alcohol) is filled into space between an outer cylinder 1 and an inner cylinder 2 to give a hollow cylinder 10, the hollow cylinder 10 is pressed, taken out from the space between the outer cylinder and the inner cylinder to give the objective fiber tube 11 for coating roll.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber tube, and more particularly, as a substitute for a tuber-like felt, for roll coating which can be mounted on the outer periphery of a roll core material. The present invention relates to a method for manufacturing a fiber tube.

[0002]

2. Description of the Related Art Conventionally, in an aluminum forming factory, for example, when an aluminum extrusion die material is conveyed, rubber is used as the outer peripheral material of the roll core material on the surface of the conveyance roll (roller). Coating, non-woven coating,
The felt is covered.

For example, in the extrusion processing of aluminum (hereinafter referred to as aluminum), the extrusion die material that has come out of the die of the extrusion tool is conveyed to the post-processing equipment while being heated and made into a desired aluminum processed product. For this reason, in an aluminum processing plant, a conveyor and a lifting machine such as a drive conveyor, a walking beam cooling stand, and a line-out table are installed, and the extrusion die material immediately after coming out of the die is
It is supported by a plurality of transfer rollers, and then sent to a predetermined transfer machine or processing equipment. Immediately after coming out of the die, the extrusion mold material has a high temperature close to the melting point of aluminum (660 ° C.), so that the surface will be damaged if it comes into direct contact with the roller surface. For this reason, the roller surface is coated with rubber, non-woven fabric or felt as described above. Many of the rubber-coated rolls are made of hard rubber, which may damage the surface of conveyed products such as aluminum plates.In recent years, non-woven fabric-coated rolls and tube-shaped felts have been used. Attention has been paid.

The method for producing a non-woven fabric-coated roll is generally as follows: a method in which a narrow non-woven fabric is spirally wound around the outer periphery of a roll core material, or a non-woven fabric is rolled.
For example, a method is used in which a large number of discs punched in a nut shape are fitted to a roll core material and compression molded.

However, in the roll method of winding the narrow width nonwoven fabric around the roll core material, it takes a lot of work. In the winding, one end of the narrow width nonwoven fabric is fixed to the roll core material, and then the nonwoven cloth is formed into a nonwoven fabric. It is wound in the width direction of the roll sequentially while applying tension, but at this time, a gap may occur between the non-woven fabrics, resulting in lack of uniformity of the roll surface. There is. Furthermore, when a thick non-woven fabric is wound around a small-diameter roll, the non-woven fabric surface is greatly bent, the surface porosity is large, and the roll core material side is compressed and the density is large. This causes a problem that the layer and the inner layer have different characteristics.

Further, in the method of compression-molding a large number of doughnut-shaped nonwoven fabrics on a roll core material, it takes too much time and labor such as preparing a large number of discs punched into a donut-shaped nonwoven fabric, Further, a needle punching process (needling) is required to form the nonwoven fabric, and this needling requires a lot of time.

On the other hand, a tube-like felt formed by using a woven fabric and / or yarn made of heat-shrinkable fibers as a base layer, and attaching a fiber web to one or both sides of the base layer, and integrating them into a cylindrical shape by a needle ring. Is proposed. This tube-shaped felt can be rolled by covering it with various rolls and then heating it.
Since it can be closely attached to the core material, it can be used conveniently, but due to its shrinkability, it is generally difficult to make one with a certain diameter, it takes time to needle, and a base cloth is also required. The cost will be high.

Examples of utility models and patents that describe the tuber-shaped felt and the non-woven fabric-coated roll include, as examples of Japanese Utility Model Publication No. 2-4145, Japanese Patent Application Laid-Open No. 2-251657, Japanese Patent Publication No. 3-23665, JP-A No. 54-33940, JP-A No. 60-94661, and Japanese Utility Model Laid-Open No. 2-54917 are mentioned.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the drawbacks of the prior art.

[0010]

DISCLOSURE OF THE INVENTION According to the present invention, a hollow cylindrical body is filled with a fiber composition containing fibers, a fiber binder and an organic solvent in a space between an outer cylinder and an inner cylinder. The present invention relates to a method for producing a roll-covering fiber tube, characterized in that the hollow tubular body is pressed to be removed from between the outer cylinder and the inner cylinder to the outside. ..

Next, a preferred embodiment of the manufacturing method of the present invention will be described with reference to the drawings as appropriate. As shown in FIG. 2, the space (gap) between the outer cylinder 1 and the inner cylinder 2 is filled with a fiber composition 3 containing fibers, a fiber binder and an organic solvent. As the fibers, synthetic fibers such as aramid fibers and polyester fibers, inorganic fibers such as ceramic fibers, carbon fibers, glass fibers and metal fibers, and natural fibers such as wool and cotton can be used. These fibers can be appropriately mixed and used. The fiber is a heat resistant fiber,
The present invention is preferable from the desired purpose. The fibers are preferably short fibers in view of the fact that they can be made bulky and considering the production method of the present invention. As the fiber, for example, a pulp-like material (lump-like material) or a chip-like material of aramid fiber can be used, which may be unraveled and made into a short fiber form. The fact that the entire short fibers are uniform means that the outer cylinder 1 and the inner cylinder 2
It is preferable because the space can be easily filled. If the short fibers are too short, the density of the hollow cylinder is difficult to increase. On the other hand, if the short fibers are too long, it is difficult to put them in the space between the outer cylinder 1 and the inner cylinder 2. .5m
m is preferred. The fiber composition 3 contains a fiber binder. The fiber binder is not particularly limited as long as the above fibers can be bonded to form a desired hollow cylindrical material, but it is preferable that it has heat resistance for the above-mentioned purpose. Examples of the binder include synthetic resins such as silicone resins and epoxy resins. Examples of the organic solvent include alcohol.
Are used. From the production method of the present invention, the solvent is preferably one that can be easily evaporated and can appropriately solubilize the resin, and alcohol is mentioned as a preferable example. However, depending on the type of fiber and the type of fiber binder, it is also possible to use toluene, xylene, acetone, or other organic solvent in relation to the wetting property and compatibility with them. Additives such as a curing agent can be appropriately added to the fiber composition depending on the type of the fiber binder. As shown in FIG. 2, an outer cylinder 1 having an opening at the lower end.
Is placed on top of a mesh body having a wire net, a synthetic fiber net or a filter-4 on the upper end surface thereof, or another filter body 5. In FIG. 2, 6 is a tank, 7 is a vacuum pump,
The tank 6 is decompressed by a vacuum pump. When the vacuum pump 7 is operated, the solvent is absorbed from the fiber composition 3, is delivered to the mesh body or other filter body 5, and is guided to the tank 6 via the pipe 8. The fiber composition 3 gradually forms a hollow cylindrical body (cylindrical body) in the space between the outer cylinder 1 and the inner cylinder 2. At that time, the fiber composition 3 can be appropriately replenished from above in the space between the outer cylinder 1 and the inner cylinder 2. The fiber composition 3 is compressed in the space between the outer cylinder 1 and the inner cylinder 2 to promote the formation of a hollow cylindrical body (cylindrical body). For compression, for example, disks are mounted on the upper and lower surfaces of the outer cylinder 1.

FIG. 3 illustrates a state in which the hollow cylindrical body is extruded downward from the space between the outer cylinder 1 and the inner cylinder 2. As shown in FIG. 3, the extrusion can be performed, for example, by pressing the hollow cylindrical object 10 from above with a cylinder 9 having a smaller diameter than the outer cylinder 1 and a larger diameter than the inner cylinder 2. .. Although not shown in the drawing, the hollow cylinder can be taken out by providing the inner cylinder with a structure that can be disassembled toward the inside and the outer cylinder with a structure that can be disassembled toward the outside.

In the present invention, as shown in FIG. 4 (a), for example, the cross section in the direction perpendicular to the axis of the inner cylinder 1 is not a perfect circle, but is a concave part locally in a perfect circle, for example, as shown in the same figure. 20
4 has a cross-sectional shape having
A hollow cylindrical member 10 having a convex portion 100 as shown in FIG. 9B is obtained, and this hollow cylindrical member 10 is resistant to rotational deviation from the corresponding roll core member 12. be able to. Instead of the aspect shown in this example, the cross section in the direction perpendicular to the axis of the inner cylinder 1 is not a perfect circle but a cross-section having a convex portion locally in the perfect circle, or has a polygonal shape. It can be changed as appropriate. ,

The hollow cylindrical member 10 removed from the space between the outer cylinder 1 and the inner cylinder 2 is heated, if necessary, so that the hollow cylinder 10 shown in FIG.
A cylindrical fiber tube 11 as shown in FIG.

[0015]

EXAMPLES Next, the present invention will be further explained based on examples. Example 1. The aramid fiber (trade name: Twaron, manufactured by Enka) was disentangled to form short fibers (0.5 to 1.5 mm) having a length within a certain range as much as possible.
A fiber composition comprising 5 denier aramid fiber, a silicone resin and an alcohol (ethanol) was prepared.
The ratio of aramid fiber to silicone resin to alcohol in the fiber composition was 3: 1: 80. The fiber composition was filled into the space between the outer cylinder (diameter 78 mm) and the inner cylinder (48 mm) while suctioning with a vacuum pump. Disks were attached to the upper and lower ends of the outer cylinder. After 30 minutes of suction time, a pressure of 6.5 kg / cm ² was applied to the upper disc, and after compression to a thickness of 32% of the thickness after suction, the lower disc was removed and the cylinder (diameter 50 mm) was used to extrude the hollow cylinder from the space, and after removing the disk, heating was performed at 150 ° C. for 25 minutes to obtain a fiber tube. By going through this compression and heating process, alcohol and silicone
The resin was squeezed out, the alcohol was vaporized, and the weight loss was caused by the crosslinking reaction of the silicone resin. In the fiber tube after heating, the alcohol was completely eliminated, and the aramid fiber and the silicone resin The ratio was 100: 1.

[0016]

According to the present invention, as described above, the fiber tube can be obtained by a simple method in a very short time. That is, since a conventional method of spirally winding a non-woven fabric is not used, a fiber tube can be obtained in a short time, a situation in which a gap is formed between the non-woven fabrics is avoided, and a high compression is achieved. Fibers are included in the density, and furthermore, a fiber tube having a uniform density can be obtained throughout, and the density can be freely selected. Further, unlike the conventional method of fitting a large number of doughnut-shaped non-woven fabrics to a roll core material and compression molding, it is not necessary to prepare a large number of discs (non-woven fabrics) and the nut ring is used. The processing does not take much time. On the other hand, in the conventional tuber-shaped felt, it is difficult to obtain the one having a constant diameter, but in the present invention, the one having a constant diameter corresponding to the diameter of the space of the outer cylinder and the inner cylinder is obtained from the processing method. The
Further, the inner surface and the outer surface are in contact with the cylindrical body to obtain a hollow cylindrical body, so that the surface becomes uniform and smooth. In addition, there is no need for a annealing step, and there is no need to prepare a base cloth or fiber web. Therefore, not only a highly uniform outer core plate of a roll core material can be obtained in a short time, but also an inexpensive one can be obtained. Further, the hollow cylindrical product produced by the method of the present invention is used in the aluminum extrusion process because the constituent fibers are three-dimensionally intertwined with each other and they are integrated by the fiber binder, and moreover, they are uniform and smooth. The surface wear at the time is remarkably reduced, and the wear amount is about 1/2 of the roll using the conventional donut-shaped nonwoven fabric and about 1/3 of the roll coated with the tuber-like felt. Therefore, a remarkable effect was obtained also in terms of life.

[Brief description of drawings]

FIG. 1 is a perspective view of a fiber tube showing an embodiment of the present invention,

FIG. 2 is a configuration diagram of a manufacturing apparatus showing an embodiment of the present invention,

FIG. 3 is an explanatory view of a main part of a manufacturing process showing an embodiment of the present invention,

FIG. 4 is a sectional view showing another embodiment of the present invention,

[Explanation of symbols]

 1 Outer Cylinder 2 Inner Cylinder 3 Fiber Composition 4 Wire Mesh, Synthetic Fiber Mesh or Filter 5 Mesh or Other Filter 6 Tank 7 Vacuum Pump 8 Pipe 9 Cylinder 10 Hollow Cylinder 11 Fiber Tube 12 Roll Core material

Claims (5)

[Claims] 1. A space between an outer cylinder and an inner cylinder is filled with a fiber composition containing fibers, a fiber binder and an organic solvent,
A hollow cylindrical body, and the hollow cylindrical body is pressed to remove the hollow cylinder from the space between the outer cylinder and the inner cylinder to the outside.
A method for manufacturing a fiber tube for coating a fiber. 2. The method for producing a fiber tube for roll coating according to claim 1, wherein the fiber composition contains alcohol as an organic solvent. 3. The method according to claim 1, wherein the hollow cylindrical body is formed by removing the organic solvent under vacuum and compressing the fiber composition filled in the space between the outer cylinder and the inner cylinder. Described
A method for manufacturing a fiber tube for coating a fiber. 4. The fiber tulle for roll coating according to claim 1, wherein the hollow tubular body is heated after being removed.
Manufacturing method of bu. 5. The cross section in the direction perpendicular to the axis of the inner cylinder forming the inner surface of the hollow cylindrical body is a shape having a convex portion or a concave portion in a perfect circle, according to any one of claims 1 to 4. 1. A method for producing a roll-covering fiber tube according to claim 1.