JP2000126814A - Metallic fiber bundle, and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic fiber without fluff by providing corrugation deformed by a continuous curve. SOLUTION: A metallic fiber bundle 1 is manufactured. The metallic fiber bundle 1 is deformed by a continuous curve. The wavelength of the continuous curve is preferably 20-50 times the diameter of a drawn bundling material, and the wave height of the continuous curve is 0.5 to 5 times the diameter of the drawn bundling material. The bending of the curved line shape is repeatedly given by passing the bundling material before melting in a roller group arranged in a staggered manner, and then, the matrix is melted to obtain the metallic fiber bundle. For example, a low carbon steel containing 0.08 wt.% carbon is a matrix, a bundling material in which 1700 stainless steel wires (SUS316L) are embedded in the matrix is drawn by a die and contracted to the diameter of 0.62 mm, and then, passed through the roller group arranged in a staggered manner of 15 mm in diameter to give the deformation of corrugation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal fiber bundle of a product using a metal fiber such as a filter and a catalyst carrier, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a metal fiber bundle at a low cost, a sizing material obtained by gathering and embedding corrosion-resistant metal wires in a matrix metal which is easily dissolved in an acid or the like is drawn by using a die to obtain a desired wire. , And then the matrix was dissolved with an acid or the like to obtain a metal fiber bundle.

[0003] The obtained metal fiber bundle is then cut and unwound, then sintered and used for a filter or a catalyst carrier. In addition, the obtained metal fiber bundle is twisted into a metal fiber twisted yarn or used as a woven fabric.

The above metal fiber bundle has a metal fiber diameter of 2 to 2.
At 40 μm, the number of metal fibers is 100 to 2,000. However, in the production of a metal fiber bundle, the degree of processing differs in the depth direction of the bundled material in the drawing of the bundled material. Not wire processed. This means that the metal fibers in the drawn wire bundle are composed of metal fibers having different lengths. In the step of dissolving the matrix in such a drawn bundled material to obtain a metal fiber bundle, when the matrix is melted, the metal fibers having a long length protrude from the outer periphery of the metal fiber bundle, and a part of the so-called metal fiber is formed. It becomes a sagging state, and the sagging metal fiber breaks due to contact with a guide or the like at the time of melting, causing fluffing. In addition, short metal fibers are broken when subjected to a tensile tension during the dissolution treatment, causing fluffing.

[0005] The fuzz generated during the dissolution of the matrix causes the metal fiber bundle to become entangled during the dissolution treatment or to cause a wire breakage by being caught on a guide or the like. Further, in the case of a melting process in which a plurality of drawn bundles are unwound from an unwinder and run while being aligned, adjacent metal fiber bundles become entangled and cause disconnection. Further, the metal fiber bundle having fluffing may not be able to be unraveled or entangled in subsequent processing such as cutting, unraveling, twisting or weaving, and may also be tangled during twisting or weaving of the metal fiber bundle. There is a problem that twisting occurs and hinders weaving.

[0006] As a method for suppressing the fluffing of the metal fiber bundle described above, if the sizing material is knitted by a gear before melting and then melted, it is restrained at a point bent in the longitudinal direction of the metal fiber method. A method for suppressing fluffing is known, but this method is not sufficient because it cannot suppress fluffing between points.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to suppress the slack of a part of metal fibers in a matrix dissolution treatment of a drawn bunched material. An object of the present invention is to provide a metal fiber bundle in which fluffing is suppressed and a method for producing the same.

[0008]

According to a first aspect of the present invention, the metal fiber bundle is a metal fiber bundle having a continuous curved wavy shape. Here, the continuous curving is 20 to 50 times the diameter of the bundled material whose wavelength is drawn, and the wave height is 0.5 to 5 times the diameter of the bundled material. Further, the curved shape that is continuously formed is a spiral shape.

A second aspect of the present invention is a method of manufacturing a metal fiber bundle according to the present invention, wherein a bundle material before melting is passed through a group of rollers arranged in a staggered manner, thereby repeatedly bending a curved shape. And then dissolving the matrix to obtain a metal fiber bundle.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the metal fiber bundle according to the present invention, since the metal fiber bundle is formed into a continuous curved shape, there is little restriction of the metal fibers in the metal fiber bundle. The metal fibers can be moved within the fiber bundle and can be rearranged. Further, in the corrugated metal fiber bundle, as shown in FIG. 4, long metal fibers and short metal fibers can be simultaneously arranged in a metal fiber bundle of a predetermined length. That is, when the matrix is melted, the long metal fiber length is moved and arranged so as to pass through the convex portions of the corrugated metal fiber bundle, and the short metal fiber length is corrugated metal fiber. Since the bundle is moved and arranged so as to pass through the concave portions of the bundle, the one having a long metal fiber length does not jump out of the outer periphery of the metal fiber bundle. In this way, it is possible to mix long metal fibers and short metal fibers in the metal fiber bundle with a continuous curve by rearranging the metal fibers, so that some metal fibers protrude from the metal fiber bundle. Absent. These effects can be obtained by forming a continuous curve into a three-dimensional helical shape rather than a two-dimensional helical shape, so that those having a greater difference in the length of the metal fiber can be mixed.

The wave shape of the sizing material can be determined as appropriate so as to exert the above-mentioned effects. Preferably, the wavelength is 20 to 50 times the diameter of the reduced sizing material, and the wave height is the diameter of the sizing material. 0.5 to 5 times. When the wavelength exceeds 50 times, or when the wave height is less than 0.5, metal fibers having different lengths cannot be mixed and fluffing cannot be suppressed. On the other hand, if the wavelength is less than 20 times or the wave height exceeds 5 times, the load in the processing step for providing a continuous curve becomes large and the productivity is reduced, and the effect of suppressing fluffing is not so much improved.

[0012] In the method of the present invention for providing continuous curving to a sizing material, it is obtained by performing continuous curving by passing between rollers arranged in a staggered manner. Here, the wavelength and wave height at the time of shaping are the roller diameter,
By setting the roller interval appropriately, the roller
A desired curved shape can be obtained by appropriately setting the tension or torsion added to the bundle when the bundle is passed between the groups. Furthermore, in this method,
By using bending with rollers, the rollers during bending can be used.
The frictional force in the length direction of the sizing material does not work between the sizing material and the sizing material, so that the processing does not damage the sizing material and does not break the metal fibers in the sizing material. It is possible to suppress slackening of the metal fibers and, consequently, fluffing.

[0013]

The present invention will be described more specifically with reference to the following examples. First, the metal fiber bundle 1 was manufactured according to the second aspect of the present invention. FIG. 1 is a schematic diagram thereof. That is, a low carbon steel having a carbon content of 0.08% by weight and a matrix material,
A bundle of 1700 stainless steel (SUS316L) wires embedded in the matrix material was drawn with a die to reduce the diameter to 0.62 mm. At this time, the diameter of the stainless steel fiber was 8 μm.

[0014] Then, the bundle material having the reduced diameter has a diameter of 15 mm.
Waves were formed between the rollers in a zigzag foot-like roller group of mm. Here, the arrangement of the rollers 2, 2, and ‥‥ of the roller group is shown in FIG. 2, and an example of the distance between the rollers in the length direction and the distance between the rollers in the height direction is shown in FIG. 3 is shown. The distance between the rollers in the length direction and the distance between the rollers in the height direction refer to the relative distance between the center points of a pair of adjacent rollers, and the distance a in the right direction is positive in the right direction. The distance b in the height direction is a distance with the upward direction being positive. When the rollers are bent through the bundle, the rollers arranged in a zigzag pattern are denoted by R1, R2,..., R12 in order from the entrance side.

Here, in the bending process by passing between the roller groups, the tension tension applied to the sizing material when entering the roller group is set to 10 kg, and the sizing material has a torsion of 10 degrees per meter. Was added. The added tension was set to 10 kg because a bending curve cannot be obtained if the tensile tension is increased. By passing the sizing material between the roller groups with a predetermined tension or less, a predetermined habit can be formed. By adding a torsion at the time of processing, it is possible to form a spiral wave habit.

The wave shape of the molded sizing material has a wavelength of 15
mm and a continuous spiral shape with a wave height of 0.5 mm. Six corrugated bundles were unwound, unrolled in parallel, immersed in a dissolving solution to continuously dissolve and remove the matrix, and wound up on a reel. The shape of the metal fiber bundle from which the matrix has been dissolved and removed has a wavelength of 15 mm.
Was a continuous spiral wave shape having a wave height of 0.5 mm.

As a conventional example having no corrugated shape, loosening and fluffing of some metal fibers during melting were comparatively evaluated. In the conventional metal fiber bundle without curling, a part of the metal fiber hangs down by about 30 mm at a length of 1 m. However, the metal fiber according to the present invention does not have such a state. Are arranged in the metal fiber bundle. The number of fluffs per 10 cm in the length direction of the metal fiber bundle was 100 or more in the conventional metal fiber bundle, but was 20 or less in this example.

In the present invention, a metal fiber bundle with little fluffing can be obtained, so that it is not entangled or broken in the subsequent twisting process as in the prior art, and even when cutting and wire breaking is performed. The wire could be normally unwound, and thereafter used without any trouble in processing.

[0019]

As described above, according to the present invention, a metal fiber bundle having no fluff can be obtained by applying a continuous curve to the sizing material.

[Brief description of the drawings]

FIG. 1 is a schematic view of a metal fiber bundle of the present invention.

FIG. 2 is a schematic view of a molding machine without a continuous curve.

FIG. 3 is a table showing a relationship between roller groups in the embodiment.

FIG. 4 is an explanatory diagram in which metal fibers having different lengths coexist in the same metal fiber bundle.

Claims (3)

[Claims] 1. A metal fiber bundle having a corrugated shape habitually formed by a continuous curve. 2. A continuous curve wherein the wavelength is 20 to 50 times the diameter of the drawn wire and the wave height is 0.5 to the diameter of the drawn wire.
The metal fiber bundle according to claim 1, which is five times as large. 3. The method according to claim 1, wherein the bundle material before melting is passed through a group of rollers arranged in a staggered manner, thereby repeatedly giving a curved bending process, and thereafter, the matrix is melted to obtain a metal fiber bundle. The method for producing a metal fiber bundle according to claim 1 or 2.