CN117612787A - Near-sector semi-magnetic attraction wire and manufacturing method thereof - Google Patents
Near-sector semi-magnetic attraction wire and manufacturing method thereof Download PDFInfo
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- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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Abstract
The invention discloses a near-sector half-magnetic attraction wire and a manufacturing method thereof, wherein the structure of the near-sector half-magnetic attraction wire comprises a conductive wire core, a near-sector half-magnetic attraction layer and a protective layer from inside to outside, and the near-sector half-magnetic attraction layer adopts magnetic parts and non-magnetic parts which are distributed in a staggered manner; the radial magnetic material adopts the magnetic material and the resin material A to be mixed and then is subjected to continuous radial magnetization by an extrusion molding and magnetizing device, so that the relative magnetic orientation of the magnetic poles N, S is realized. The magnetic attraction layer adopts the magnetic parts and the non-magnetic parts which are distributed in a staggered way, the magnetic parts form opposite N, S poles in the radial direction after being magnetized, so that attractive force is provided for self-attraction winding, and the non-magnetic parts have no magnetism in the magnetizing process, so that the magnetic attraction layer is not attracted mutually in the self-attraction winding process, the attraction interference is reduced, and the magnetic force is concentrated in the radial direction of the magnetic part. The magnetic parts are separated by the central conductive wire, opposite magnetic poles are attracted relatively, and the magnetic attraction layer and the central conductive wire are not easy to peel and slide in the winding process.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a near-sector semi-magnetic attraction wire and a manufacturing method thereof.
Background
In the electronic and communication fields, conductive transmission lines play an important role in the charging of electronic devices and signal transmission. These transmission lines are typically composed of a conductive core of copper, aluminum or a composite thereof, and are encased by an outer insulating protective layer. However, in practical use, the conductive wire often winds and curls, which is particularly problematic when the wire is thin and soft. In addition, when a plurality of wires are used simultaneously, the wires are not only easy to wind, but also mutually intertwined, and are difficult to separate, such as earphone wires.
The crimped winding of the wire may cause difficulty in installation and use and increase the complexity of line maintenance. The curled wire has a small bending radius, which may cause wire breakage, short circuit, leakage, and other potential safety hazards. In addition, the curled wire is easy to become entangled state, increasing the difficulty of disentangling, wasting time and energy.
In recent years, many improvements have been made in the data line technology for convenience of carrying and storage. One common technical improvement is to reduce the winding problem by adding local magnetic attraction means to the ends of the data wire or the wire to form clamps to keep the wires aligned in the same direction. However, this structure also has some problems:
first, the use of a local magnetic attraction device requires additional devices or clamps, which not only increases the overall weight of the data line, but also makes the line cumbersome. Especially for long wires, adding magnetic attraction devices at different positions would require a large number of device points, increasing the cost of production and maintenance.
Second, while the localized magnetic attraction device may reduce the partial winding problem, the effect is not ideal for flexible wires. The local magnetic attraction device has limited effectiveness in preventing winding because of the flexibility and bending capability of the wire itself. Thus, even if such a device is used, the wire is still easily wound and knotted during use, and the winding problem cannot be completely solved.
For this problem, some new solutions are being studied and developed, aiming at overcoming the limitations of the current technological improvements. For example, a technology of improving winding of a data line by adding a magnetic attraction layer on the data line is also paid attention to, and the main method is that a layer of magnetic attraction material is wrapped outside the data line, and then a single N, S pole is radially formed in the whole length range of the data line by a post winding and large magnetic field magnetizing technology, so that the data line is automatically arranged into a solenoid shape due to the opposite attraction of N, S poles when the data line is applied, and storage is formed. The technology has the problems that the cost is increased due to the later winding and the magnetizing of a large magnetic field, the positioning capability of N, S pole attraction is poor during application, the magnetic field leaks more to the surrounding space, and the magnetic property waste is large.
At present, the magnetic attraction lines prepared by extrusion molding are of structures which are entirely and completely wrapped with conductive core wires, N, S poles are formed to penetrate through the whole lines after magnetization, however, because the whole magnetic attraction layers are made of magnetic materials, N, S poles formed after magnetization are dispersed on the cross section of the whole magnetic attraction layers, and therefore a certain magnetic field still exists when deviating from the vertical direction, and the upper surface and the lower surface attract each other and simultaneously displace inwards and outwards when the later automatic winding is caused. Also, a larger magnetization field is required due to magnetization dispersion.
Disclosure of Invention
The first object of the invention is to provide a near-sector semi-magnetic attraction wire and a manufacturing method thereof, which aims at overcoming the defects of the prior art.
The invention provides a near-sector half-magnetic attraction wire, which comprises a conductive wire core (1), a near-sector half-magnetic attraction layer (2) and a protective layer (3) from inside to outside;
the near-sector semi-magnetic attraction layer (2) comprises a plurality of magnetic components (2-1) and a plurality of non-magnetic components (2-2) which are circumferentially distributed along the outer surface of the conductive wire core (1); the magnetic components (2-1) and the non-magnetic components (2-2) are distributed in a staggered manner; the magnetic component (2-1) is made of radial magnetic materials; the radial magnetic material is prepared by mixing a magnetic material and a resin material A, extruding, forming and magnetizing by using a magnetizing device, and continuously radially magnetizing to realize magnetic orientation; the non-magnetic component (2-2) is made of a non-magnetic material;
in one embodiment, the cross section of the near-sector semi-magnetic attraction layer (2) is annular;
in one embodiment, the near-sector half magnetic attraction layer (2) comprises two magnetic components (2-1) with the same size and two non-magnetic components (2-2) with the same size, each magnetic component (2-1) in the same cross section has a size which is one fourth of that of the near-sector half magnetic attraction layer (2), and each non-magnetic component (2-2) has a size which is one fourth of that of the near-sector half magnetic attraction layer (2);
in one embodiment, the radial magnetic poles in the same magnetic component (2-1) are distributed in a N, S staggered way;
in one implementation mode, the cross section of the semi-magnetic attraction layer (2) is symmetrical in the center, the two magnetic parts (2-1) are symmetrical in the center, and the magnetic poles of the two magnetic parts (2-1) close to the center are opposite in magnetism;
in one embodiment, the mass ratio of the magnetic material to the resin material A is 88:12-95:5;
in one embodiment, the magnetic material is at least one of isotropic or anisotropic rare earth permanent magnetic material and ferrite permanent magnetic material; the rare earth permanent magnetic material is Nd-Fe-B or Sm-Fe-N permanent magnetic material, and the ferrite permanent magnetic material is strontium ferrite or barium ferrite permanent magnetic material.
In one embodiment, the resin material a is an elastomer resin, and the elastomer resin is at least one of plastic and rubber.
In one embodiment, the material of the protective layer (3) is at least one of plastics and rubber;
in one embodiment, the protective layer (3) is in a net or layered structure; the net is formed by braiding a plurality of filament strips;
in one embodiment, the magnetic field of the pulse magnetizing device is 0.6-4.5T, more preferably 2-4.5T if the magnetic material contains rare earth permanent magnetic material, and 0.6-2T if the magnetic material completely adopts ferrite permanent magnetic material; the magnetic field direction is perpendicular to the extrusion direction and limited in the thickness range of the die and is parallel to the cross section of the magnetic component (2-1);
in one embodiment, the extrusion molding process comprises the following process parameters: the extrusion temperature is between room temperature and 290 ℃, and the die temperature is between room temperature and 220 ℃.
In one embodiment, the thickness of the near-sector half magnetic attraction layer (2) is 0.2-0.8 mm;
in one embodiment, the non-magnetic material is a mixture of a resin material A and a reinforcing agent; the reinforcing agent is one of nano calcium carbonate, glass fiber or carbon fiber material; the mass ratio of the reinforcing agent to the resin material A is 10-30: 70-90.
In one implementation mode, the conductive wire core (1) is a conductive wire wrapped by an insulating protective sleeve;
in a second aspect, the present invention provides a method for manufacturing a near-sector half-magnetic attraction wire, comprising:
the non-magnetic material and the radial magnetic material are wrapped on the outer surface of the conductive wire core (1) through an extrusion molding process, and a magnetic attraction layer is formed on the outer surface of the conductive wire core (1); the magnetic attraction layer comprises magnetic parts (2-1) and nonmagnetic parts (2-2) which are distributed in a staggered manner in the same axial range by taking the central line of the conductive wire core (1) as an axis; a protective layer (3) formed on the outer surface of the magnetic attraction layer through an extrusion molding process or a direct wrapping process; and finally, continuously and radially magnetizing the magnetic component (2-1) through a magnetizing device to enable the magnetic component to generate opposite N, S poles in the radial direction, and forming a nearly fan-shaped semi-magnetic attraction layer (2) by the magnetic attraction layer.
In summary, the invention achieves the following beneficial effects:
(1) The magnetic attraction layer is formed by extrusion, can be continuously produced and manufactured, and has high automation degree and production efficiency.
(2) The magnetic attraction layer comprises magnetic parts and non-magnetic parts which are distributed in a staggered manner, the magnetic parts form opposite N, S poles in the radial direction after being magnetized, attractive force is provided for self-attraction winding, and the non-magnetic parts have no magnetism in the magnetizing process, so that the magnetic attraction layer is not attracted to each other in the self-attraction winding process, the attraction interference is reduced, and the magnetic force is concentrated in the radial direction of the magnetic part.
(3) The magnetic parts are separated by the central conductive wire, opposite magnetic poles are attracted relatively, and the additional magnetic attraction force enables the half-sector magnetic attraction layer to have stronger binding force with the central conductive wire, so that the magnetic attraction layer and the central conductive wire are not easy to peel and slide in the winding process.
(3) Because the invention adopts the half magnetic attraction structure, the magnetic material layer with larger density only occupies half volume, the weight of the magnetic attraction wire can be greatly reduced while the magnetic attraction is satisfied, and the material cost is reduced.
(4) When the wire rod is applied, the wire rod can be automatically attracted and wound in the N, S pole direction, the direction perpendicular to the N, S pole direction is not attractive, the attraction direction is consistent, the storage is simple and convenient, and meanwhile, the wire rod can be freely adsorbed in an iron metal wall surface or a metal box and cannot be shifted and disordered.
Drawings
FIG. 1 is a diagram of the structure of a wave magnetic wire of the present invention.
Fig. 2 is a schematic view of the magnetic wire winding of the present invention.
The figure indicates: 1. the conductive wire core, 2, nearly fan-shaped semi-magnetic attraction layer, 3, protective layer, 2-1, magnetic part, 2-2, non-magnetic part.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "comprising" and "having" and any variations thereof, as used in the embodiments of the present invention, are intended to cover non-exclusive inclusion. Where a composition is described as having, comprising or including a particular component or where a process is described as having, comprising or including a particular process step, it is contemplated that the composition of the teachings of the present invention also consist essentially of or consist of the recited component and that the process of the teachings of the present invention also consist essentially of or consist of the recited process step.
In order to solve the problem that the wire rod is easy to curl and wind, a local magnetic attraction device is additionally arranged, the whole weight of the data wire is increased, and the wire winding effect is poor. The other is to add a layer of magnetic attraction material with a single radial magnetic pole within the length range of the data line, but the later winding and the magnetizing of a large magnetic field not only increase the cost, but also have poor positioning capability of the N, S pole attraction during application, and the magnetic field leakage causes larger magnetic property waste. Therefore, in order to better improve the wire winding effect of the wire rod and reduce the production cost, the problems to be solved are: when guaranteeing the wire winding effect and low production cost of wire rod, how to reduce the magnetic field leakage and the magnetic property loss of wire rod.
Based on the above, the embodiment of the invention provides a near-sector half-magnetic attraction wire, which adopts a half-magnetic attraction structure, reduces attraction interference when attraction force is provided during self-attraction winding, ensures that magnetic force is concentrated in the radial direction of a magnetic part, and reduces magnetic field leakage and magnetic property loss during attraction. Fig. 2 is a schematic view of the magnetic wire winding of the present invention.
The near-sector semi-magnetic attraction wire comprises a conductive wire core 1, a near-sector semi-magnetic attraction layer 2 and a protective layer 3 from inside to outside;
the near-sector semi-magnetic attraction layer 2 comprises a plurality of magnetic parts 2-1 and a plurality of non-magnetic parts 2-2 which are circumferentially distributed along the outer surface of the conductive wire core 1; the magnetic parts 2-1 and the non-magnetic parts 2-2 are distributed in a staggered manner; the magnetic component 2-1 is made of radial magnetic materials; the radial magnetic material adopts a magnetic material and a resin material A to be mixed and then is subjected to continuous radial magnetization by an extrusion molding and magnetizing device, so that magnetic orientation is realized;
the cross section of the near-sector half magnetic attraction layer 2 is annular;
the near-sector-shaped half-magnetic attraction layer 2 comprises two magnetic components 2-1 with the same size and two non-magnetic components 2-2 with the same size, wherein the size of each magnetic component 2-1 in the same cross section accounts for one fourth of the near-sector-shaped half-magnetic attraction layer 2, and the size of each non-magnetic component 2-2 accounts for one fourth of the near-sector-shaped half-magnetic attraction layer 2;
the radial magnetic poles in the same magnetic component 2-1 are distributed in a N, S staggered way;
in the same cross section, the centers of the two magnetic parts 2-1 are symmetrical, and the magnetic poles of the two magnetic parts 2-1 close to the center are opposite in magnetism;
the mass ratio of the magnetic material to the resin material A is 88:12-95:5;
the magnetic material is at least one of isotropic or anisotropic rare earth permanent magnetic material and ferrite permanent magnetic material; the rare earth permanent magnetic material is Nd-Fe-B or Sm-Fe-N permanent magnetic material, and the ferrite permanent magnetic material is strontium ferrite or barium ferrite permanent magnetic material. The Sm-Fe-N permanent magnet material and Nd-Fe-B permanent magnet material can be prepared by adopting a reduction diffusion method, and can be seen in super permanent magnet-rare earth iron permanent magnet material, metallurgical industry Press, 1999; the strontium ferrite permanent magnetic material and the barium ferrite permanent magnetic material can be prepared by adopting a solid phase method, and can be seen in ferrite magnetic materials, science publishers, 1981. Among them, nd used in the following examples 2 Fe 14 B、Sm 2 Fe 17 N 3 、SrFe 12 O 19 、BaFe 12 O 19 All available through purchase.
The resin material A is elastomer resin, and the elastomer resin is at least one of plastics and rubber.
The material of the protective layer 3 is at least one of plastics and rubber;
the protective layer 3 is in a net shape or a layered structure; the net is formed by braiding a plurality of filament strips;
the magnetic field of the pulse magnetizing device is 0.6-4.5T, more preferably 2-4.5T if the magnetic material adopts rare earth permanent magnetic material, and 0.6-4.5T if the magnetic material completely adopts ferrite permanent magnetic material; the magnetic field direction is perpendicular to the extrusion direction and limited in the thickness range of the die and is parallel to the cross section of the magnetic part 2-1 of the near-sector semi-magnetic layer;
the extrusion molding process comprises the following technological parameters: the extrusion temperature is between room temperature and 290 ℃, and the die temperature is between room temperature and 220 ℃.
The thickness of the near-sector half magnetic attraction layer 2 is 0.2-0.8 mm;
the non-magnetic component 2-2 is made of a non-magnetic material, and the non-magnetic material is a mixture of a resin material A and a reinforcing agent; the reinforcing agent is one of nano calcium carbonate, glass fiber or carbon fiber material; the mass ratio of the reinforcing agent to the resin material A is 10-30: 70-90.
The conductive wire core 1 adopts the existing conductive wire wrapped by an insulating protective sleeve; the insulating protective sleeve is made of polyethylene, polyvinyl chloride, silicone rubber and the like.
Meanwhile, the embodiment also provides a manufacturing method of the near-sector semi-magnetic attraction wire, which comprises the following steps:
the non-magnetic material and the radial magnetic material are wrapped on the outer surface of the conductive wire core 1 through an extrusion molding process, and a magnetic attraction layer is formed on the outer surface of the conductive wire core 1; the central line of the conductive wire core 1 is taken as an axle center, and the magnetic attraction layer is formed by alternately distributing magnetic components 2-1 and non-magnetic components 2-2 in the same axial range; a protective layer 3 formed on the outer surface of the magnetic attraction layer by an extrusion molding process or a direct wrapping process; finally, continuous radial magnetization is carried out through a magnetizing device, so that the magnetic component 2-1 generates a N, S pole opposite to the magnetic component 2-2 in the radial direction, and a near-sector semi-magnetic attraction layer 2 is formed by the non-magnetic component 2-2.
The protective layer 3 may provide a flexible color appearance as desired.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention will be further described with reference to the following specific embodiments.
Examples
Sm 2 Fe 17 N 3 The method comprises the steps that a mixture of magnetic materials, nylon resin materials (the mass ratio is 88:12) and nonmagnetic materials (the mass ratio of nano calcium carbonate to nylon resin is 10:90) are formed outside a conductive wire core 1 through extrusion molding (the extrusion temperature is 290 ℃ and the die temperature is 220 ℃), the thickness of the magnetic attraction layer 2 is 0.2mm, a plurality of magnetic parts 2-1 and a plurality of nonmagnetic parts 2-2 in the same cross section are alternately distributed along the circumferential direction of the outer surface of the conductive wire core 1, wherein the magnetic parts 2-1 occupy half of the volume of the magnetic attraction layer 2, and the volume of the magnetic parts is the same as that of the nonmagnetic parts 2-2; the black nylon braid is wound outside the magnetic attraction layer, namely, the braid is formed by a net shape formed by braiding a plurality of filament strips.
The extruded magnetic attraction wire is continuously magnetized in the radial direction under the magnetic field of 4.5T, so that the magnetic component 2-1 generates opposite N, S poles in the diameter direction, and the magnetic attraction layer forms a nearly fan-shaped half magnetic attraction layer 2, thereby obtaining the required magnetic attraction wire. The magnetic field direction is perpendicular to the extrusion direction and limited within the thickness range of the die and is parallel to the cross section of the magnetic part 2-1 of the half-sector magnetic layer.
The prepared magnetic attraction wire is shown in fig. 1 and consists of a conductive wire core 1, a near-sector semi-magnetic attraction layer 2 and a protective layer 3 from inside to outside, wherein the conductive wire core 1 is a conventional conductive wire with an additional insulation protective sleeve. The magnetic component 2-1 of the near-sector half-magnetic attraction layer 2 consists of Sm with the mass ratio of 88:12 2 Fe 17 N 3 Mixing the magnetic material and the nylon resin material, and then carrying out continuous radial magnetization by an extrusion molding and magnetizing device to realize magnetic orientation; the magnetic attraction line is near to the sector-shaped half magnetic attraction layer 2, the surface magnetism is 450Gs, and the magnetic attraction line can be formed along the N,S direction self-priming winding.
Examples
The nylon resin material in example 1 was replaced with a silicone rubber material, the extrusion temperature was room temperature, the die temperature was 120 ℃, and other experimental conditions were the same as in example 1, to finally obtain the desired magnetic wire.
The prepared magnetic attraction wire is shown in fig. 1 and consists of a conductive wire core 1, a near-sector semi-magnetic attraction layer 2 and a protective layer 3 from inside to outside, wherein the conductive wire core 1 is a conventional conductive wire with an additional insulation protective sleeve. The magnetic component 2-1 of the near-sector half-magnetic attraction layer 2 consists of Sm with the mass ratio of 88:12 2 Fe 17 N 3 The magnetic material and the silicon rubber material are mixed and then are subjected to continuous radial magnetization by an extrusion molding and magnetizing device, so that magnetic orientation is realized. The surface magnetism of the magnetic attraction line near sector-shaped half magnetic attraction layer 2 is 437Gs, and the magnetic attraction line can be wound in a self-priming mode along the N, S direction.
Examples
Sm in example 1 2 Fe 17 N 3 Replacement of magnetic material with Nd 2 Fe 14 And B, replacing the nylon resin material with a TPE elastomer resin material, wherein the non-magnetic part consists of glass fibers and TPE elastomer resin (the mass ratio is 30:70), the magnetic attraction layer 2 is 0.5mm, the extrusion temperature is 220 ℃, the die temperature is 160 ℃, and other experimental conditions are the same as those of the embodiment 1, so that the required magnetic attraction wire is finally obtained.
The prepared magnetic attraction wire is shown in fig. 1 and consists of a conductive wire core 1, a near-sector semi-magnetic attraction layer 2 and a protective layer 3 from inside to outside, wherein the conductive wire core 1 is a conventional conductive wire with an additional insulation protective sleeve. The magnetic component 2-1 of the near-sector half-magnetic attraction layer 2 consists of Nd with the mass ratio of 88:12 2 Fe 14 And B, mixing the magnetic material with the TPE elastomer resin material, and then carrying out continuous radial magnetization by using an extrusion molding and magnetizing device to realize magnetic orientation. The surface magnetism of the magnetic attraction line near sector-shaped half magnetic attraction layer 2 is 578s, and the magnetic attraction line can be wound in a self-priming mode along the N, S direction.
Examples
Anisotropic SrFe 12 O 19 Magnetic material, a mixture of TPE elastomer resin material (mass ratio of 95:5) and non-magnetic material (carbon fiber and TPE elastomerThe mass ratio of the resin is 10:90), and a magnetic component 2-1 and a non-magnetic component 2-2 of a magnetic attraction layer are formed outside the conductive wire core 1 through extrusion molding (the extrusion temperature is 220 ℃ and the die temperature is 160 ℃), wherein the thickness of the magnetic attraction layer is 0.8mm, and a plurality of magnetic components 2-1 and a plurality of non-magnetic components 2-2 in the same cross section are alternately distributed along the circumferential direction of the outer surface of the conductive wire core 1, wherein the magnetic components 2-1 occupy half of the volume of the magnetic attraction layer 2 and have the same volume as the non-magnetic components 2-2.
The TPE elastomer is wrapped outside the magnetic attraction layer by an extrusion molding process to form a protective layer, namely, a mesh-shaped woven belt formed by weaving a plurality of thread-shaped strips.
The extruded magnetic attraction wire is continuously magnetized in the radial direction under the magnetic field of 0.6T, so that the magnetic component 2-1 generates opposite N, S poles in the diameter direction, and the magnetic attraction layer forms a nearly fan-shaped half magnetic attraction layer 2, thereby obtaining the required magnetic attraction wire. The magnetic field direction is perpendicular to the extrusion direction and limited within the thickness range of the die and is parallel to the cross section of the magnetic part 2-1 of the half-sector magnetic layer.
The prepared magnetic attraction wire is shown in fig. 1 and consists of a conductive wire core 1, a near-sector semi-magnetic attraction layer 2 and a protective layer 3 from inside to outside, wherein the conductive wire core 1 is a conventional conductive wire with an additional insulation protective sleeve. The magnetic component 2-1 of the near-sector half magnetic attraction layer 2 consists of anisotropic SrFe with the mass ratio of 95:5 12 O 19 The magnetic material and the TPE elastomer resin material are mixed and then are subjected to continuous radial magnetization by an extrusion molding and magnetizing device, so that magnetic orientation is realized. The magnetic attraction line is near to the sector-shaped half magnetic attraction layer 2, the surface magnetism is 386Gs, and the magnetic attraction line can be wound in a self-priming mode along the N, S direction.
Examples
Anisotropic SrFe in example 4 12 O 19 Replacement of magnetic material with anisotropic BaFe 12 O 19 The magnetic material, TPE elastomer resin was replaced with TPU elastomer resin, the magnetic field was replaced with 4.5T at 0.6T, the extrusion temperature was 220℃and the die temperature was 160℃and other experimental conditions were the same as in example 1, to finally obtain the desired magnet wire.
The prepared magnetic attraction wire consists of a conductive wire core 1, a near-sector semi-magnetic attraction layer 2 and a protective layer 3 from inside to outside, whereinThe conductive core 1 is a conventional conductive wire with an additional insulating protective sheath. The magnetic component 2-1 of the near-sector half-magnetic attraction layer 2 consists of anisotropic BaFe with the mass ratio of 95:5 12 O 19 The magnetic material and the TPU elastomer resin material are mixed and then are subjected to continuous radial magnetization by an extrusion molding and magnetizing device, so that magnetic orientation is realized. The magnetic attraction line is close to the sector-shaped half magnetic attraction layer 2, the surface magnetism is 370Gs, and the magnetic attraction line can be wound in a self-priming mode along the N, S direction.
Examples
Anisotropic Sm 2 Fe 17 N 3 Rare earth permanent magnet material, srFe 12 O 19 The magnetic material, the mixture of TPE elastomer resin material (the mass ratio of 50:45:5) and the non-magnetic material (the mass ratio of nano calcium carbonate to TPE elastomer resin is 10:90) form a magnetic component 2-1 and a non-magnetic component 2-2 of a magnetic attraction layer outside the conductive wire core 1 through extrusion molding (the extrusion temperature is 220 ℃ and the die temperature is room temperature), the thickness of the magnetic attraction layer is 0.8mm, and a plurality of magnetic components 2-1 and a plurality of non-magnetic components 2-2 in the same cross section are alternately distributed along the circumference of the outer surface of the conductive wire core 1, wherein the plurality of magnetic components 2-1 occupy half of the volume of the magnetic attraction layer 2 and the volume of the plurality of non-magnetic components 2-2 is the same.
The extruded magnetic attraction wire is continuously magnetized in the radial direction under the magnetic field of 4.5T, so that the magnetic component 2-1 generates opposite N, S poles in the diameter direction, and the magnetic attraction layer forms a nearly fan-shaped half magnetic attraction layer 2, thereby obtaining the required magnetic attraction wire. The magnetic field direction is perpendicular to the extrusion direction and limited within the thickness range of the die and is parallel to the cross section of the magnetic part 2-1 of the half-sector magnetic layer.
The prepared magnetic attraction wire is shown in fig. 1 and consists of a conductive wire core 1, a near-sector semi-magnetic attraction layer 2 and a protective layer 3 from inside to outside, wherein the conductive wire core 1 is a conventional conductive wire with an additional insulation protective sleeve. The magnetic component 2-1 of the near-sector half magnetic attraction layer 2 is formed by anisotropic Sm with the mass ratio of 50:45:5 2 Fe 17 N 3 Rare earth permanent magnet material, srFe 12 O 19 Mixing the magnetic material and the TPE elastomer resin material, and then carrying out continuous radial magnetization by an extrusion molding and magnetizing device to realize magnetic orientation; the surface magnetism of the magnetic attraction line near sector-shaped half magnetic attraction layer 2 is 445Gs, and can be along the N, S directionWinding to self-priming.
Comparative example 1
The thickness of the magnetic attraction layer 2 in example 1 was changed from 0.2mm to 0.1mm, and the other experimental conditions were the same as in example 1, to finally obtain the desired magnetic attraction wire.
The prepared magnetic attraction wire is composed of a conductive wire core 1, a near-sector semi-magnetic attraction layer 2 and a protective layer 3 from inside to outside, wherein the conductive wire core 1 is a conventional conductive wire with an additional insulation protective sleeve. The magnetic component 2-1 of the near-sector half-magnetic attraction layer 2 consists of Sm with the mass ratio of 88:12 2 Fe 17 N 3 Mixing the magnetic material and the silicone rubber material, and then carrying out continuous radial magnetization by an extrusion molding and magnetizing device to realize magnetic orientation; the magnetic attraction line is close to the sector-shaped half magnetic attraction layer 2, the surface magnetism is 283Gs, and the magnetic attraction line can be wound in a self-priming mode along the N, S direction, but the magnetic attraction line is weak and easy to scatter.
Comparative example 2
The thickness of the magnetic attraction layer 2 in example 5 was changed from 0.8mm to 0.1mm, and the other experimental conditions were the same as in example 1, to finally obtain the desired magnetic attraction wire.
The prepared magnetic attraction wire is composed of a conductive wire core 1, a near-sector semi-magnetic attraction layer 2 and a protective layer 3 from inside to outside, wherein the conductive wire core 1 is a conventional conductive wire with an additional insulation protective sleeve. The magnetic component 2-1 of the near-sector half magnetic attraction layer 2 consists of anisotropic SrFe with the mass ratio of 95:5 12 O 19 Mixing the magnetic material and the TPE elastomer resin material, and then carrying out continuous radial magnetization by an extrusion molding and magnetizing device to realize magnetic orientation; the surface magnetism of the magnetic attraction wire near-sector half magnetic attraction layer 2 is 105Gs, and the near-sector half magnetic layer is too thin and is difficult to self-suction wind.
The invention and its embodiments have been described above without limitation, and the actual embodiments are not limited thereto. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (10)
1. The near-sector semi-magnetic attraction wire comprises a conductive wire core (1), a near-sector semi-magnetic attraction layer (2) and a protective layer (3) from inside to outside; the semi-magnetic attraction layer (2) is characterized by comprising a plurality of magnetic parts (2-1) and a plurality of non-magnetic parts (2-2) which are circumferentially distributed along the outer surface of the conductive wire core (1); the magnetic components (2-1) and the non-magnetic components (2-2) are distributed in a staggered manner;
the magnetic component (2-1) is made of radial magnetic materials; the radial magnetic material is prepared by mixing a magnetic material and a resin material A, extruding, forming and magnetizing by using a magnetizing device, and continuously radially magnetizing to realize magnetic orientation;
the non-magnetic component (2-2) is made of non-magnetic materials.
2. A near-sector shaped semi-magnetic attraction wire according to claim 1, characterized in that the cross section of the near-sector shaped semi-magnetic attraction layer (2) is ring-shaped; the thickness of the near-sector half magnetic attraction layer (2) is 0.2-0.8 mm.
3. A near sector shaped semi-magnetic attraction wire according to claim 1, characterized in that the near sector shaped semi-magnetic attraction layer (2) comprises two magnetic parts (2-1) of the same size, two non-magnetic parts (2-2) of the same size, each magnetic part (2-1) in the same cross section having a size of one quarter of the near sector shaped semi-magnetic attraction layer (2) and each non-magnetic part (2-2) having a size of one quarter of the near sector shaped semi-magnetic attraction layer (2).
4. A near-sector shaped half magnetic attraction wire according to claim 1, characterized in that the near-sector shaped half magnetic attraction layer (2) in cross section is centrosymmetric and the magnetic poles of the two magnetic parts (2-1) near the center are opposite in magnetism; the radial magnetic poles in the same magnetic component (2-1) are staggered N, S.
5. The near-sector half magnetic attraction wire according to claim 1, wherein the mass ratio of the magnetic material to the resin material A is 88:12-95:5; the magnetic material is at least one of isotropic or anisotropic rare earth permanent magnetic material and ferrite permanent magnetic material; the rare earth permanent magnetic material is Nd-Fe-B or Sm-Fe-N permanent magnetic material, and the ferrite permanent magnetic material is strontium ferrite or barium ferrite permanent magnetic material; the resin material A is elastomer resin, and the elastomer resin is at least one of plastics and rubber.
6. A near sector shaped semi-magnetic attraction wire according to claim 1, characterized in that the material of the protective layer (3) is at least one of plastic and rubber; the protective layer (3) is in a net shape or a layered structure; the net is woven by a plurality of filament strips.
7. The near-sector half-magnet wire according to claim 1, wherein the magnetic field of the pulse magnetizing device is 0.6-4.5T, more preferably 2-4.5T if the magnetic material contains rare earth permanent magnet material, and 0.6-2T if the magnetic material completely adopts ferrite permanent magnet material; the magnetic field direction is perpendicular to the extrusion direction and limited within the thickness range of the die and is parallel to the cross section of the magnetic component (2-1).
8. The near-sector semi-magnetic attraction wire of claim 1, wherein the extrusion process has the following process parameters: the extrusion temperature is between room temperature and 290 ℃, and the die temperature is between room temperature and 220 ℃.
9. A near-sector half magnet according to claim 1, wherein the non-magnetic material is a mixture of a resin material a and a reinforcing agent; the reinforcing agent is one of nano calcium carbonate, glass fiber or carbon fiber material; the mass ratio of the reinforcing agent to the resin material A is 10-30: 70-90.
10. A method for manufacturing a near-sector-shaped semi-magnetic attraction wire according to any one of claims 1-9, characterized in that it comprises in particular:
the non-magnetic material and the radial magnetic material are wrapped on the outer surface of the conductive wire core (1) through an extrusion molding process, and a magnetic attraction layer is formed on the outer surface of the conductive wire core (1); the magnetic attraction layer comprises magnetic parts (2-1) and nonmagnetic parts (2-2) which are distributed in a staggered manner in the same axial range by taking the central line of the conductive wire core (1) as an axis; a protective layer (3) formed on the outer surface of the magnetic attraction layer through an extrusion molding process or a direct wrapping process; and finally, continuously and radially magnetizing the magnetic component (2-1) through a magnetizing device to enable the magnetic component to generate opposite N, S poles in the radial direction, and forming a nearly fan-shaped semi-magnetic attraction layer (2) by the magnetic attraction layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311836925.5A CN117612787A (en) | 2023-12-28 | 2023-12-28 | Near-sector semi-magnetic attraction wire and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311836925.5A CN117612787A (en) | 2023-12-28 | 2023-12-28 | Near-sector semi-magnetic attraction wire and manufacturing method thereof |
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| CN117612787A true CN117612787A (en) | 2024-02-27 |
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| CN202311836925.5A Pending CN117612787A (en) | 2023-12-28 | 2023-12-28 | Near-sector semi-magnetic attraction wire and manufacturing method thereof |
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