System and method for preparing metal fibers

Abstract

The invention discloses a system and method for preparing metal fibers, and belongs to the technical field of metal fiber preparation. The system comprises a cooling roller, a tundish and a smelting device, the cooling roller comprises a roller body and a cutting piece; the cutting piece is arranged on the surface of the roller body and provided with a protruding part. The tundish comprises a tundish body and a nozzle structure. The nozzle structure is provided with a plurality of spraying holes, and the hole centers of all the spraying holes are collinear. The cooling roller is used for being matched with the multiple spraying holes. The preparation method comprises the steps that the system is adopted, raw materials are smelted in the smelting device, molten metal is obtained and then poured into the tundish body, then the molten metal is sprayed to the surface of the cooling roller in the rotating state through the spraying holes, independent metal fibers are formed after cooling, and short fibers or strips with the controllable length are formed under the action of the cutting piece. The preparation method is low in cost and high in efficiency, simultaneous preparation of multiple groups of fibers can be achieved, and short fibers or strips with the controllable length can be continuously and rapidly prepared.

Description

Technical Field

[0001] The present invention relates to the technical field of metal fiber filament preparation, and in particular to a system and method for preparing metal fiber filament. Background Art

[0002] At present, the methods for preparing metal fiber filaments include drawing method, glass cladding method and cutting method. Among them, the drawing method has the problems of large footprint, high cost investment, low preparation efficiency, high production cost and easy oxidation of the product; the glass cladding method has the problems of high process requirements and the use of hazardous chemicals in the preparation process; the cutting method has the problems of low processing efficiency, poor continuity and poor uniformity.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The object of the present invention is to provide a system and method for preparing metal fiber filaments to solve or improve at least one of the above-mentioned technical problems.

[0005] The present invention can be implemented like this:

[0006] In a first aspect, the present invention provides a system for preparing metal fiber filaments, the system comprising a cooling roller, a tundish and a smelting device;

[0007] The cooling roller comprises a roller body and a cutting piece; the cutting piece is arranged on the surface of the roller body, and the cutting piece has a protrusion, and the protrusion protrudes outward from the surface of the roller body;

[0008] The tundish includes a tundish body and a nozzle structure; the nozzle structure is arranged at the bottom of the tundish body and is connected to the tundish body; the smelting device cooperates with the tundish to pour the molten metal into the tundish body;

[0009] The nozzle structure has multiple spray holes, and the hole centers of all the spray holes are on the same line;

[0010] The cooling roller is used to cooperate with multiple spray holes so that the molten metal sprayed from each spray hole forms independent metal fiber wires after cooling on the surface of the cooling roller and breaks into short fiber wires or strips with controllable length during contact with the protruding part of the cutting piece.

[0011] In an optional embodiment, the cutting element is welded or clamped to the roller body.

[0012] In an optional embodiment, a surface of the roller body is provided with an inwardly recessed groove, and the cutting piece is engaged with the groove;

[0013] The width of the groove gradually decreases along a direction extending outward from the surface of the roller body.

[0014] In an optional embodiment, the cutting member is a rack, and a connection area between the rack and the roller body extends from one end of the roller body to the other end of the roller body.

[0015] In an optional embodiment, there are a plurality of cutting members, and the plurality of cutting members are distributed at intervals along the circumference of the cooling roller.

[0016] In an optional embodiment, the projection of the line connecting the centers of all the nozzle holes in the circumferential direction of the cooling roller is not perpendicular to the axis of the cooling roller.

[0017] In an optional embodiment, two adjacent spray holes are spaced apart, and the spacing between the two adjacent spray holes is 25 mm to 50 mm;

[0018] and / or, the diameter of a single nozzle hole is 1 mm to 2 mm;

[0019] And / or, the number of the nozzle holes is 2 to 5.

[0020] In a second aspect, the present invention provides a method for preparing metal fiber filaments, comprising: using the system of any one of the aforementioned embodiments to melt the raw materials of the metal fiber filaments in a smelting device to obtain molten metal; pouring the molten metal into a tundish body, and spraying the molten metal from the tundish body through a spray hole to the surface of a rotating cooling roller, forming independent metal fiber filaments after cooling and forming short fiber filaments or strips with controllable length under the action of a cutting member.

[0021] In an optional embodiment, the raw material includes at least one of an Al alloy, a Fe-based alloy, and a high carbon steel alloy;

[0022] And / or, the smelting temperature is at least 100°C to 150°C higher than the melting point of the raw material.

[0023] In an optional embodiment, the rotation speed of the cooling roller is 10 m / s to 35 m / s.

[0024] The beneficial effects of the present invention include:

[0025] The system for preparing metal fiber filaments provided by the present invention can continuously and quickly prepare short fiber filaments or strips with controllable length by arranging cutting pieces on the surface of the roller body; by arranging a nozzle structure with multiple spray holes at the bottom of the tundish, the molten metal in the tundish can be sprayed simultaneously through different spray holes to the surface of the rotating cooling roller, and the molten metal forms a filamentary structure after cooling, thereby achieving multiple metal fiber filaments on the surface of the cooling roller at the same time.

[0026] The above system is used to prepare metal fiber filaments with low cost and high efficiency. It can not only realize the simultaneous preparation of multiple groups of fiber filaments, but also continuously and quickly prepare short fiber filaments or strips with controllable length. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the structure of a system for preparing metal fiber filaments provided by the present invention;

[0029] Figure 2 A schematic diagram of a first structure of a cooling roller in a system for preparing metal fiber filaments provided by the present invention at a first viewing angle;

[0030] Figure 3 A second structural schematic diagram of a cooling roller in a system for preparing metal fiber filaments provided by the present invention at a first viewing angle;

[0031] Figure 4 A schematic structural diagram of a cooling roller in a system for preparing metal fiber filaments provided by the present invention at a second viewing angle;

[0032] Figure 5 This is a schematic diagram of the structure of the nozzle in the system for preparing metal fiber filaments provided by the present invention.

[0033] Icons: 10-smelting device; 20-tundish; 21-tundish body; 22-nozzle structure; 221-spray hole; 30-cooling roller; 31-roller body; 311-slot; 312-first end; 313-second end; 32-cutting piece; 321-protrusion; 322-tip; 40-metal fiber wire. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0039] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0040] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0041] Please combine Figures 1 to 5 The present invention provides a system for preparing metal fiber wires, which includes a cooling roller, a tundish and a smelting device 10.

[0042] The cooling roller includes a roller body and a cutting member 32. The cutting member 32 is arranged on the surface of the roller body 31, and has a protrusion 321. The protrusion 321 protrudes outward from the surface of the roller body 31, and the protrusion 321 is used to break the metal wire during contact with the metal wire to form a metal ribbon with controllable length.

[0043] Specifically, since metal materials are very brittle under extremely cold conditions, during the rapid rotation of the cooling copper roller, due to the presence of the cutting piece 32, a large shear force will be generated between the end of the protrusion 321 of the cutting piece 32 and the metal wire, resulting in the breakage of the metal wire, thereby obtaining a metal ribbon with controllable length.

[0044] In some optional embodiments, the cutting member 32 can be connected to the roller body 31 by a snap-fitting manner (eg Figure 2 In some other optional embodiments, the cutting member 32 can be connected to the roller body 31 by welding (such as Figure 3 As shown), after welding, the connection between the cooling roller and the cutting piece 32 is polished.

[0045] As for the clamping, a surface of the roller body 31 is provided with an inwardly recessed clamping groove 311 , and the cutting member 32 is clamped in the clamping groove 311 .

[0046] In some preferred embodiments, the width of the slot 311 gradually decreases along the direction extending outward from the surface of the roller body 31. Exemplarily, the slot 311 may be in a trapezoidal shape, preferably a non-right-angled trapezoidal shape, on a plane parallel to the end surface of the roller body 31.

[0047] By providing the above-mentioned slot 311 , the cutting member 32 can be effectively limited and fixed.

[0048] Furthermore, detachable fixings may be provided on the two end surfaces of the roller body 31 to prevent the cutting piece 32 from detaching from the two end surfaces, thereby achieving a close fit between the cutting piece 32 and the roller body 31 without looseness and without falling off even during high-speed rotation.

[0049] In an optional embodiment, the cutting member 32 is a rack. For example, the cross section of the rack is triangular. The cross section is a plane parallel to the end surface of the roller body 31 under the use condition. In addition, the cross section of the rack can also be other shapes, but the end protruding outward along the roller body 31 has only one tip 322.

[0050] The roller body 31 has a first end 312 and a second end 313 opposite to each other (eg Figure 4 As shown), the distance from the first end 312 to the second end 313 of the roller body 31 is defined as the length of the roller body 31.

[0051] In some optional embodiments, the connection area between the rack and the roller body 31 extends from one end of the roller body 31 (such as the first end 312) to the other end of the roller body 31 (such as the second end 313), that is, the connection length between the rack and the roller body is equal to the length of the roller body 31.

[0052] In some other optional embodiments, the connection length between the rack and the roller body 31 may also be smaller than the length of the roller body 31 .

[0053] In some optional embodiments, the number of the cutting member 32 may be only 1. In other optional embodiments, the number of the cutting member 32 is plural.

[0054] When there are multiple cutting pieces 32, the multiple cutting pieces 32 are distributed at intervals along the circumference of the cooling copper roller. For example, the multiple cutting pieces 32 can be distributed at equal intervals along the circumference of the cooling copper roller, or can be distributed at non-equidistant intervals along the circumference of the cooling copper roller.

[0055] When the plurality of cutting pieces 32 are distributed at equal intervals along the circumference of the cooling roller, the prepared fiber filaments or strips have uniform lengths. When the plurality of cutting pieces 32 are distributed at non-equidistant intervals along the circumference of the cooling copper roller, for example, the spacing between two adjacent cutting pieces 32 is not equal, at this time, the materials prepared in each batch will present different lengths according to the spacing between the cutting pieces 32, which is conducive to forming a distribution state of fiber filaments of different lengths.

[0056] In some embodiments, due to the limitation of the size of the cooling roller, the length of the fiber filament or strip is a multiple of 1 / n of the circumference of the cooling roller (2πr). For example, the circumference of the cooling roller is divided into n parts according to equal proportion, and the length of each part is The first length Second copy The third length is And so on, the spacing increases proportionally until a complete circumference is formed. If the last section cannot form an integer multiple of the circumference, the spacing arrangement does not need to be based on the above ratio.

[0057] In some embodiments, when the rack spacing is arranged on the surface of the cooling roller in a non-uniform ratio, the length of the material prepared in each batch will be arranged in a certain proportion according to the rack spacing, which is conducive to forming a distribution state of fiber filaments of different lengths. For example, the rack spacing is arranged in a non-uniformly increasing manner to form a certain spacing of 10mm, 20mm, 40mm, 60mm, 80mm, etc., and the length of the corresponding prepared material will show a distribution with the same regularity as the rack spacing arrangement.

[0058] In some optional embodiments, taking the diameter of the roller body 31 as 400 mm as an example, when multiple cutting pieces 32 are equidistantly spaced along the circumference of the cooling copper roller, if the number of cutting pieces 32 is 2, the spacing between the two cutting pieces 32 can be 630 mm; if the number of cutting pieces 32 is 3, along the same direction, the spacing between two adjacent cutting pieces 32 can be 420 mm; if the number of cutting pieces 32 is 4, along the same direction, the spacing between two adjacent cutting pieces 32 can be 320 mm; if the number of cutting pieces 32 is 5, along the same direction, the spacing between two adjacent cutting pieces 32 can be 250 mm; if the number of cutting pieces 32 is 6, along the same direction, the spacing between two adjacent cutting pieces 32 can be 210 mm; if the number of cutting pieces 32 is 14, along the same direction, the spacing between two adjacent cutting pieces 32 can be 90 mm.

[0059] Similarly, taking the diameter of the roller body 31 as 400 mm as an example, when multiple cutting pieces 32 are distributed at non-equidistant intervals along the circumference of the cooling copper roller, taking the number of cutting pieces 32 as 7 as an example, along the same direction, the spacing between the first cutting piece 32 and the second cutting piece 32 can be 10 mm, the spacing between the second cutting piece 32 and the third cutting piece 32 can be 40 mm, the spacing between the third cutting piece 32 and the fourth cutting piece 32 can be 80 mm, the spacing between the fourth cutting piece 32 and the fifth cutting piece 32 can be 120 mm, the spacing between the fifth cutting piece 32 and the sixth cutting piece 32 can be 200 mm, and the spacing between the sixth cutting piece 32 and the seventh cutting piece 32 can be 300 mm.

[0060] In addition, the roller body 31 with other diameters may also be used according to actual needs.

[0061] In the present invention, the tundish 20 includes a tundish body 21 and a nozzle structure 22. The nozzle structure 22 is disposed at the bottom of the tundish body 21 and communicated with the tundish body 21. The smelting device 10 cooperates with the tundish to pour the molten metal into the tundish body.

[0062] The nozzle structure 22 has a plurality of spray holes 221, and the centers of all the spray holes 221 are on the same line (eg Figure 5 As shown), that is, the centers of all the spray holes 221 are on the same straight line.

[0063] The cooling roller 30 is used to cooperate with the multiple nozzles 221 so that the molten metal sprayed from each nozzle 221 forms independent metal fiber filaments 40 after being cooled on the surface of the cooling roller 30 and breaks into short fiber filaments or strips with controllable length during contact with the protruding part of the cutting piece.

[0064] By arranging a nozzle structure 22 with multiple spray holes 221 at the bottom of the tundish 20, the molten metal in the tundish 20 can be sprayed simultaneously onto the surface of the rotating cooling roller 30 through different spray holes 221. After cooling, the molten metal forms a filamentary structure, thereby achieving the goal of obtaining multiple metal fiber filaments 40 on the surface of the cooling roller 30 at the same time.

[0065] In the present invention, the projection of the hole center line of all the spray holes 221 in the circumferential direction of the cooling roller 30 is not perpendicular to the axis of the cooling roller 30 .

[0066] In some optional embodiments, the projection of the hole center line of all the spray holes 221 in the circumferential direction of the cooling roller 30 is parallel to the axis of the cooling roller 30 .

[0067] In some other optional embodiments, the projection of the hole center line of all the spray holes 221 on the circumferential direction of the cooling roller 30 forms an angle other than 90° with the axis of the cooling roller 30 .

[0068] By setting the projection of the hole center line of all the spray holes 221 on the circumferential direction of the cooling roller 30 to be non-perpendicular to the axis of the cooling roller 30, the problem of overlapping and mutual influence of materials during the spraying process is effectively avoided.

[0069] In some optional embodiments, two adjacent spray holes 221 may be disposed continuously.

[0070] In some other optional embodiments, two adjacent spray holes 221 are arranged at intervals. Preferably, the interval arrangement is adopted.

[0071] In some optional embodiments, the spacing between two adjacent spray holes 221 may be 25 mm to 50 mm, such as 25 mm, 30 mm, 35 mm, 40 mm, 45 mm or 50 mm, or other values ​​within the range of 25 mm to 50 mm. The spacing may also be adjusted according to actual needs.

[0072] Exemplarily, the diameter of a single nozzle hole 221 may be 1 mm to 2 mm, such as 1 mm, 1.5 mm or 2 mm, or may be other values ​​within the range of 1 mm to 2 mm.

[0073] The diameter of the single spray hole 221 should not be too small, otherwise it will easily cause the problem of hole blockage; the diameter of the single spray hole 221 should not be too large, otherwise it will easily cause the metal liquid to be unfocused after spraying, affecting the product quality.

[0074] By setting the diameter of a single nozzle hole 221 to the above range, the diameter of the prepared metal fiber filament 40 can be substantially matched with the diameter of the nozzle hole 221 , thereby effectively controlling the size of the metal fiber filament 40 .

[0075] In some embodiments, the diameters of all the nozzle holes 221 are equal to prepare metal fiber filaments 40 with uniform sizes, thereby improving the consistency of the product.

[0076] In addition, in other embodiments, the diameters of the spray holes 221 can be set to be different according to actual needs, so that metal fiber filaments 40 of different sizes can be obtained at one time.

[0077] In some embodiments, the number of the nozzle holes 221 may be 2 to 5, such as 2 or 3 (eg Figure 5 As shown in the figure), 4 or 5, in addition, the number of the spray holes 221 can also be set to more than 5 as needed. However, the more the number of the spray holes 221 is, the higher the overall cooling power is required, which will increase the cooling cost.

[0078] As an example, the diameter of the cooling roller 30 is 400 mm:

[0079] In one embodiment, the number of the spray holes 221 may be 2, the spacing between the spray holes 221 may be 50 mm, and the diameter of the spray holes 221 may be 2 mm;

[0080] In another embodiment, the number of the spray holes 221 may be 3, the distance between two adjacent spray holes 221 may be 30 mm, and the diameter of the spray hole 221 may be 2 mm;

[0081] In another embodiment, the number of the spray holes 221 may be 4, the distance between two adjacent spray holes 221 may be 25 mm, and the diameter of the spray hole 221 may be 2 mm;

[0082] In another embodiment, the number of the spray holes 221 may be 5, the distance between two adjacent spray holes 221 may be 25 mm, and the diameter of the spray holes 221 may be 2 mm;

[0083] In another embodiment, the number of the spray holes 221 may be 3, the distance between two adjacent spray holes 221 may be 30 mm, and the diameter of the spray holes 221 may be 1.5 mm;

[0084] In another embodiment, the number of the spray holes 221 may be 3, the distance between two adjacent spray holes 221 may be 30 mm, and the diameter of the spray holes 221 may be 1 mm.

[0085] Furthermore, the tundish 20 may further include a valve, and the number of the valves may be one or more.

[0086] When there is only one valve, the valve can control all the spray holes 221 simultaneously; when there are multiple valves, each spray hole 221 can be independently adapted to a valve, thereby achieving independent control of the outflow of materials in the spray hole 221.

[0087] Correspondingly, the present invention also provides a method for preparing metal fiber wires, comprising: using the above-mentioned preparation system to melt the raw materials of the metal fiber wires in a smelting device 10 to obtain molten metal; pouring the molten metal into the tundish body, and spraying the molten metal from the tundish body through the spray hole to the surface of a rotating cooling roller, forming independent metal fiber wires after cooling and forming short fiber wires or strips with controllable length under the action of a cutting member.

[0088] The raw material may illustratively but not limitatively include at least one of Al alloy, Fe-based alloy and high carbon steel alloy.

[0089] The smelting temperature is at least 100°C to 150°C higher than the melting point of the raw materials.

[0090] In some optional embodiments, the rotation speed of the cooling roller can be 10m / s to 35m / s, such as 10m / s, 15m / s, 20m / s, 25m / s, 30m / s or 35m / s, or other values ​​within the range of 10m / s to 35m / s.

[0091] As mentioned above, after the molten metal is sprayed onto the surface of the high-speed rotating cooling roller, the molten metal is rapidly cooled to form metal fiber filaments. In addition, the surface of the cooling roller is provided with a cutting piece 32 protruding outward, and a large shear force will be generated between the tip 322 of the cutting piece 32 and the metal fiber filaments, resulting in the breakage of the metal fiber filaments, thereby obtaining short fiber filaments or strips with controllable length. That is, by providing the cutting piece 32 on the surface of the roller body 31, short fiber filaments or strips with controllable length can be continuously and quickly prepared, which can be used as raw materials for fiber felt, or as filling materials, or as reinforcing agents mixed with other substrates, especially metal material systems. It should be noted that in the general copper roller method for preparing strips, the surface of the copper roller is smooth, and the product prepared is a complete long strip of wire or strip. In addition, the present invention can simultaneously spray the molten metal in the tundish 20 to the surface of the rotating cooling roller 30 through different nozzle holes 221 by arranging a nozzle structure 22 with multiple nozzle holes 221 at the bottom of the tundish 20. The molten metal forms a filamentary structure after cooling, thereby achieving simultaneous acquisition of multiple metal fiber filaments 40 on the surface of the cooling roller 30. The metal fiber filament preparation system has a simple structure and high preparation efficiency, can achieve simultaneous preparation of multiple groups of fiber filaments, has strong continuity and consistency, and can greatly reduce production costs.

[0092] The following are some examples of preparation schemes and the corresponding wire materials obtained:

[0093] ①. Taking iron-based alloy as raw material as an example, when the diameter of the cooling roller is 400 mm and the diameter of the nozzle is 2 mm, the rack is designed according to the proportional spacing, and the length, width and thickness of the prepared wire are shown in Table 1.

[0094] Table 1 Wire material results

[0095] Design rack number n Rack spacing mm Wire length mm Wire width mm Wire thickness mm 1 1250 1240 2.3 0.025 2 630 610 2.3 0.025 3 420 390 2.3 0.025 4 320 280 2.3 0.025 5 250 220 2.3 0.025 6 210 170 2.3 0.025 14 90 10 2.3 0.025

[0096] ② Taking aluminum-based alloy as the raw material as an example, when the diameter of the cooling roller is 400 mm and the diameter of the nozzle is 2 mm, the rack is designed according to the proportional spacing, and the length, width and thickness of the prepared wire are shown in Table 2.

[0097] Table 2 Wire material results

[0098] Design rack number n Rack spacing Wire length mm Wire width mm Wire thickness mm 1 1250 1240 2.3 0.03 2 630 610 2.3 0.03 3 420 390 2.3 0.03 4 320 280 2.3 0.03 5 250 220 2.3 0.03 6 210 170 2.3 0.03 14 90 10 2.3 0.03

[0099] ③. Taking aluminum-based alloy as the raw material as an example, when the diameter of the cooling roller is 400 mm, the diameter of the nozzle is 2 mm, and the number of racks designed with non-uniform spacing is 7, the length, width and thickness of the prepared wire are shown in Table 3.

[0100] Table 3 Wire material results

[0101] Spacing between racks Rack spacing Wire length mm Wire width mm Wire thickness mm First to second spacing 10 10 2.3 0.03 The second to third spacing 40 40 2.3 0.03 The third to fourth spacing 80 80 2.3 0.03 The fourth to fifth interval 120 120 2.3 0.03 Fifth to sixth spacing 200 200 2.3 0.03 Sixth to seventh spacing 300 300 2.3 0.03 Seventh to first interval 450 450 2.3 0.03

[0102] ④. Taking iron-based alloy as raw material as an example, when the diameter of the cooling roller is 400 mm and the diameter of the nozzle is 2 mm, the number and spacing of the nozzles and the width and thickness of the prepared wire are shown in Table 4.

[0103] Table 4 Wire material results

[0104] Number of nozzles Spray hole spacing mm Spray hole diameter mm Wire width mm Thickness mm 2 50 2.0 2.3 0.03 3 30 2.0 2.3 0.03 4 25 2.0 2.3 0.03 5 25 2.0 2.3 0.03 3 30 1.5 2.0 0.03 3 30 1.0 1.5 0.03

[0105] Furthermore, the tensile strength test was conducted on the Al alloy wire and the high carbon steel alloy wire with a width of 2.3 mm prepared by the present invention, and the results showed that when the wire was very thin, the tensile strength of the Al alloy wire was 100MPa to 200MPa, and the tensile strength of the high carbon steel alloy wire was between 3000MPa and 5000MPa, which were higher than the tensile strength of the stainless steel fiber and the ordinary steel fiber under the same conditions. Subsequently, the Al alloy wire and the high carbon steel alloy wire with a width of 2.3 mm prepared by the present invention were folded in half, and the results showed that they did not break, indicating that the metal fiber wire 40 prepared by the method of the present invention has high tensile strength and good toughness.

[0106] In summary, the method for preparing metal fiber filaments provided by the present invention has low cost and high efficiency, and can not only realize the simultaneous preparation of multiple groups of fiber filaments, but also can continuously and quickly prepare short fiber filaments or strips with controllable length.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A system for preparing metal fiber filaments, characterized in that: The system includes a cooling roll, a tundish and a smelting device; The cooling roller comprises a roller body and a cutting member; the cutting member is arranged on the surface of the roller body, and the cutting member has a protrusion, and the protrusion protrudes outward from the surface of the roller body; The tundish includes a tundish body and a nozzle structure; the nozzle structure is arranged at the bottom of the tundish body and is in communication with the tundish body; the smelting device cooperates with the tundish to pour the molten metal into the tundish body; The nozzle structure has a plurality of spray holes, and the hole centers of all the spray holes are on a common line; The cooling roller is used to cooperate with multiple spray holes so that the molten metal sprayed from each spray hole forms independent metal fiber filaments after cooling on the surface of the cooling roller and breaks into short fiber filaments or strips with controllable length during contact with the protruding part of the cutting piece.

2. The system according to claim 1, characterized in that The cutting piece is welded or clamped to the roller body.

3. The system according to claim 2, characterized in that The surface of the roller body is provided with an inwardly recessed slot, and the cutting piece is clamped in the slot; The width of the clamping groove gradually decreases along a direction extending outward from the surface of the roller body.

4. The system according to any one of claims 1 to 3, characterized in that: The cutting member is a rack, and a connection area between the rack and the roller body extends from one end of the roller body to the other end of the roller body.

5. The system according to claim 4, characterized in that There are a plurality of cutting members, and the plurality of cutting members are distributed at intervals along the circumference of the cooling roller.

6. The system according to claim 1, characterized in that The projection of the line connecting the centers of all the spray holes in the circumferential direction of the cooling roller is not perpendicular to the axis of the cooling roller.

7. The system according to claim 6, characterized in that The two adjacent nozzles are spaced apart, and the spacing between the two adjacent nozzles is 25mm to 50mm; and / or, the diameter of a single nozzle hole is 1 mm to 2 mm; And / or, the number of the nozzle holes is 2 to 5.

8. A method for preparing metal fiber yarn, characterized in that: include: Using the system according to any one of claims 1 to 7, the raw materials of the metal fiber filaments are melted in the melting device to obtain molten metal; The molten metal is poured into the tundish body, and sprayed from the tundish body through the spray hole to the surface of the rotating cooling roller, and after cooling, independent metal fiber filaments are formed, and short fiber filaments or strips with controllable length are formed under the action of the cutting member.

9. The method according to claim 8, characterized in that The raw material comprises at least one of Al alloy, Fe-based alloy and high carbon steel alloy; And / or, the smelting temperature is at least 100°C to 150°C higher than the melting point of the raw material.

10. The method according to claim 8, characterized in that The cooling roller has a rotation speed of 10 m / s to 35 m / s.

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