Wire extrusion die and wire

Abstract

The utility model discloses a wire extrusion die and a wire, and relates to the technical field of wire manufacturing. The wire extrusion die comprises an extrusion machine head device and a magnetic field orientation device, the extrusion machine head device comprises a core die and a shell, the shell is provided with an insertion port and an extrusion port, the core die is inserted into the shell from the insertion port, and a gap is formed between the inner wall face, close to the extrusion port, of the shell and the core die to form a glue injection cavity. The core mold is provided with a through hole for a bare wire to pass through, the through hole is communicated with the glue injection cavity, and the shell is provided with a glue injection runner communicated with the glue injection cavity; the magnetic field orientation device comprises a magnetic field generation assembly which can be connected with the shell in a separable mode, the magnetic field generation assembly is configured to conduct magnetic field orientation on a sheath of the wire rod, the magnetic field generation assembly is provided with a channel for the wire rod to penetrate through, and the channel is coaxially communicated with the through hole. Through the arrangement of the magnetic field orientation device, the manufactured sheath has a magnetic adsorption function, and after the wire rod is formed, the magnetic adsorption performance can be improved through further magnetization.

Description

Technical Field

[0001] The present application relates to the technical field of wire processing, in particular to a wire extrusion die and a wire. Background Art

[0002] In order to prevent data cables and other wires from getting tangled, industry professionals use traditional magnetic materials (ferrite, NdFeB, etc.) to prepare data cable sheaths, so that the data cables have magnetic adsorption functions and form a neat and compact shape through automatic adsorption. However, there is currently no device for magnetic field orientation during wire extrusion, so that the magnetic sheath cannot take advantage of its high magnetic properties and flame retardancy at low magnetic powder filling rates. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a wire extrusion die for solving the technical problem that the prior art cannot perform magnetic field orientation during the sheath processing of the wire.

[0004] In order to achieve at least one of the above purposes, the present application provides the following technical solutions:

[0005] An embodiment of the present application provides a wire extrusion die, wherein the sheath of the wire has a magnetic adsorption function, and the wire extrusion die comprises:

[0006] An extruder head device comprises a core mold and a shell, wherein the shell has an insertion port and an extrusion port, the core mold is inserted into the shell from the insertion port, a gap is provided between the inner wall surface of the shell adjacent to the extrusion port and the core mold to form a glue injection cavity, the core mold is provided with a through hole for a bare wire to pass through, the through hole is connected to the glue injection cavity, and the shell is provided with a glue injection flow channel connected to the glue injection cavity;

[0007] A magnetic field orientation device, comprising a detachable magnetic field generating component connected to the shell, the magnetic field generating component is configured to perform magnetic field orientation on the sheath of the wire, the magnetic field generating component is provided with a channel for the wire to pass through, the channel is coaxially connected to the through hole through the extrusion port.

[0008] The wire extrusion die as described above, wherein the magnetic field generating assembly comprises:

[0009] A first magnetic conductor having a first butt joint surface, wherein a first groove is provided on the first butt joint surface;

[0010] A second magnetic conductor having a second docking surface, the second docking surface being configured to be connected to the first docking surface, a second groove being provided on the second docking surface, and when the second docking surface is connected to the first docking surface, the first groove and the second groove are docked to form the channel;

[0011] A first permanent magnet, which is sandwiched between the first magnetic conductor and the second magnetic conductor;

[0012] The second permanent magnet is sandwiched between the first magnetic conductor and the second magnetic conductor, and the second permanent magnet and the first permanent magnet are respectively located on two opposite sides of the channel.

[0013] The wire extrusion die as described above, wherein the magnetic field orientation device further comprises a heating component, and the heating component comprises:

[0014] A first heating plate connected to the outer surface of the first magnetic conductor;

[0015] A second heating plate connected to the outer surface of the second magnetic conductor;

[0016] A controller is electrically connected to the first heating plate and the second heating plate, and the controller is configured to adjust the temperature of the first heating plate and the second heating plate.

[0017] The wire extrusion die as described above, wherein the magnetic field generating assembly further comprises:

[0018] A first heat-insulating layer, which covers an outer surface of the first permanent magnet that is not in contact with the first magnetic conductor and the second magnetic conductor;

[0019] The second heat-insulating layer covers the outer surface of the second permanent magnet which is not in contact with the first magnetic conductor and the second magnetic conductor.

[0020] The wire extrusion die as described above, wherein the magnetic field generating assembly further comprises:

[0021] a first half mold disposed in the first groove;

[0022] The second half mold is arranged in the second groove. When the first groove and the second groove are connected, the first half mold and the second half mold are connected to form a magnetic field core mold. The magnetic field core mold has a through hole allowing the wire to pass through.

[0023] The wire extrusion die as described above, wherein the magnetic field generating assembly further comprises a third heat insulation layer coated on the outside of the magnetic field core die.

[0024] The wire extrusion die as described above, wherein the magnetic field generating assembly comprises:

[0025] A plurality of fan-shaped third permanent magnets, wherein the plurality of third permanent magnets are enclosed to form a ring and form a ring-shaped Halbach array structure, and the inner hole of the ring-shaped Halbach array structure forms the channel;

[0026] A metal fastening ring, which is sleeved on the outside of the plurality of third permanent magnets;

[0027] The heating ring is sleeved on the outside of the metal fastening ring.

[0028] The wire extrusion die as described above, wherein the magnetic field generating assembly further comprises a magnetic field core mold, the magnetic field core mold is embedded in the inner hole of the annular Halbach array structure, and the magnetic field core mold is provided with a through hole allowing the wire to pass through.

[0029] The wire extrusion die as described above, wherein the magnetic field generating assembly comprises:

[0030] An electromagnet, wherein the N pole and the S pole of the electromagnet are arranged opposite to each other, and there is a gap between the N pole and the S pole of the electromagnet;

[0031] The magnetic field core mold is clamped in the gap, and the channel is arranged on the magnetic field core mold.

[0032] In the wire extrusion die as described above, the magnetic field orientation device further comprises a connecting plate connected to the first end of the magnetic field generating assembly, and the magnetic field generating assembly is connected to the housing via the connecting plate.

[0033] The wire extrusion die as described above, wherein the magnetic field orientation device further comprises a pressure cover connected to the second end of the magnetic field generating assembly, the pressure cover is provided with a wire outlet port, and the wire outlet port is coaxially connected to the channel.

[0034] In the wire extrusion die as described above, a silicone rubber positioning ring is sandwiched between the gland and the magnetic field generating assembly, and the silicone rubber positioning ring is coaxially connected to the channel and the wire outlet port.

[0035] The wire extrusion die as described above, wherein the length of the channel is less than or equal to 8 cm.

[0036] The wire extrusion die as described above, wherein a silicone tube is arranged inside the core die, the outer wall surface of the silicone tube is closely fitted to the inner wall surface of the through hole, and the inner hole of the silicone tube allows the bare wire to pass through.

[0037] The wire extrusion die as described above, wherein one end of the core mold adjacent to the insertion port is the wire inlet end, the wire inlet end is located outside the shell, a cover cap is connected to the wire inlet end, a first jack is provided on the cover cap, a silicone pressure cap is sandwiched between the cover cap and the wire inlet end, the silicone pressure cap abuts the silicone tube, a second jack is provided on the silicone pressure cap, and the first jack, the second jack and the inner hole of the silicone tube are coaxially connected in sequence.

[0038] The wire extrusion die as described above, wherein the housing comprises:

[0039] A core mold seat having a cylindrical receiving cavity, the insertion port being arranged at a first end of the core mold seat, and the injection flow channel being arranged on the core mold seat;

[0040] The mold sleeve seat has a conical receiving cavity. The first end of the mold sleeve seat can be detachably connected to the second end of the core mold seat. The large diameter end of the cylindrical receiving cavity is connected to the cylindrical receiving cavity. The extrusion port is arranged at the second end of the mold sleeve seat.

[0041] The wire extrusion die as described above, wherein the shell further comprises a glue injection seat, the glue injection seat is connected to the core mold seat, and the glue injection seat is provided with a glue injection through hole connected to the glue injection flow channel.

[0042] Another embodiment of the present application provides a wire material, which is made using the above-mentioned wire material extrusion die.

[0043] The wire as described above, wherein the sheath of the wire is a sheath made of anisotropic magnetic material and thermoplastic elastomer.

[0044] The wire as described above, wherein the sheath of the wire is a sheath made of anisotropic magnetic material, thermoplastic elastomer and flame retardant material.

[0045] The wire as described above, wherein the outside of the sheath is covered with a braided layer or a silicone layer.

[0046] The wire as described above, wherein the wire is a data wire.

[0047] The wire as described above, wherein the wire is a power cord.

[0048] The wire as described above, wherein the wire is a signal wire.

[0049] Compared with the prior art, the above technical solution has the following advantages:

[0050] The wire extrusion die of the present application has a simple structure, is easy to use, and has a low production cost, which is conducive to the production of magnetically adsorbed wires for electronic products, and can solve the problems of messy wires, difficulty in storage, and easy damage;

[0051] The wire extrusion die of the present application can orient the sheath in a molten state by providing a magnetic field orientation device, so that the grains of the magnetic material contained in the sheath are arranged along the direction of the magnetic field, so that the manufactured sheath has a magnetic adsorption function, and after the wire is formed, the magnetic adsorption performance of the sheath can be improved by further magnetization;

[0052] The wire extrusion die of the present application can avoid the eccentricity of the wire when it is drawn out through the outlet port, which increases the drawing resistance and reduces the drawing speed, by improving the smoothness of the inner wall of the flow channel, shortening the flow channel and providing a silicone rubber positioning ring, so that the wire can be smoothly drawn out after being oriented in the magnetic field;

[0053] The wire extrusion die of the present application, through the cooperation of the silicone tube, silicone pressure cap and cover, effectively prevents the coating layer raw material from flowing back into the core mold during the extrusion process, causing blockage of the flow channel and increasing the resistance to wire extraction, so that the wire can be smoothly extracted from the wire extrusion die.

[0054] The wire of the present application is made by the wire extrusion die mentioned above, so the sheath of the wire has magnetic adsorption capability, and the magnetic adsorption performance can be improved by further magnetization, and it also has flame retardant properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0056] Figure 1 A schematic cross-sectional view of a wire extrusion die provided in some embodiments of the present application;

[0057] Figure 2 yes Figure 1 The three-dimensional structural schematic diagram of the magnetic field orientation device in the wire extrusion die after the pressure cover is removed;

[0058] Figure 3 yes Figure 1 A schematic cross-sectional structure diagram of a magnetic field orientation device in a wire extrusion die from another perspective is shown;

[0059] Figure 4 is a second structural schematic diagram of a magnetic field generating component in a magnetic field orientation device;

[0060] Figure 5 It is a third structural schematic diagram of the magnetic field generating component in the magnetic field orientation device.

[0061] Description of Figure Numbers:

[0062] 10. Extruder head device;

[0063] 11. core mold; 111. through hole; 112. silicone tube; 113. cap; 1131. first plug hole; 114. silicone pressure cap; 1141. second plug hole;

[0064] 12. housing; 1201. injection cavity;

[0065] 121, core mold seat; 1211, insertion port; 1212, glue injection channel;

[0066] 122, mold sleeve seat; 1221, extrusion port; 1222, mold sleeve;

[0067] 123, glue injection seat; 1231, glue injection through hole;

[0068] 124. Tighten the nut;

[0069] 20. Magnetic field orientation device;

[0070] 21. Magnetic field generating component; 2101. Channel;

[0071] 211. a first magnetic conductor; 2111. a first docking surface;

[0072] 212, second magnetic conductor; 2121, second docking surface;

[0073] 213, a first permanent magnet; 2131, a first thermal insulation layer;

[0074] 214, second permanent magnet; 2141, second thermal insulation layer;

[0075] 215, heating assembly; 2151, first heating plate; 2152, second heating plate; 2153, controller;

[0076] 216, magnetic field core mold; 2161, first half mold; 2162, second half mold; 2163, third thermal insulation layer;

[0077] 217. a third permanent magnet;

[0078] 218, metal fastening ring; 2181, heating ring;

[0079] 219, electromagnet; 2191, magnetic pole head; 2192, soft iron pole; 2193, yoke iron; 2194, coil;

[0080] 22. Connecting plate;

[0081] 23. gland; 231. outlet port;

[0082] 24. Rubber positioning ring. DETAILED DESCRIPTION

[0083] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0084] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0085] The "embodiment" mentioned in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0086] The special word "exemplary" mentioned in this application means "used as an example, embodiment or illustrative". Any embodiment described as "exemplary" is not necessarily interpreted as being superior or better than other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0087] In the description of this application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary and secondary relationship of the indicated technical features.

[0088] In the description of the present application, the orientation or positional relationship indicated by the technical terms "upper", "lower", "inside", "outside", etc. is based on the orientation or positional relationship in the working state of the present application, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 limiting the present application. In the description of the present application, unless otherwise clearly specified and limited, the technical terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, or a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0089] In the description of the present application, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first and second features are in direct contact with each other, or that the first and second features are in indirect contact with each other through an intermediate medium.

[0090] In the description of the present application, “plurality” means two or more (including two), unless otherwise clearly and specifically defined.

[0091] The technical solutions of the embodiments of the present application are described in detail below in conjunction with the accompanying drawings. The technical features involved in the different implementation modes of the present application described below can be combined with each other as long as there is no conflict between them.

[0092] Embodiment 1

[0093] like Figure 1 As shown, the present application provides a wire extrusion die, the wire comprising a bare wire and a sheath sleeved on the outside of the bare wire, the sheath of the wire having a magnetic adsorption function, the wire extrusion die comprising an extruder head device 10 and a magnetic field orientation device 20, wherein:

[0094] The extruder head device 10 includes a core mold 11 and a housing 12, the housing 12 has an insertion port 1211 and an extrusion port 1221, the insertion port 1211 and the extrusion port 1221 are respectively located at opposite ends of the housing 12, the core mold 11 is inserted into the housing 12 from the insertion port 1211, specifically, the first end of the core mold 11 is in a truncated cone shape, the first end of the core mold 11 is inserted into the housing 12 from the insertion port 1211, and there is a gap between the inner wall surface of the housing 12 adjacent to the extrusion port 1221 and the core mold 11 to form a glue injection cavity 1201, the core mold 11 is provided with a through hole 111 for the bare wire to pass through, and the through hole 111 is connected to the glue injection cavity 1201. The outer shell 12 is connected to the cavity 1201. Specifically, an annular cavity is formed between the inner wall surface of the outer shell 12 adjacent to the extrusion port 1221 and the core mold 11, and the inner diameter of the annular cavity gradually decreases from the insertion port 1211 to the extrusion port 1221, so as to facilitate the raw materials in the glue injection cavity 1201 to flow toward the outer peripheral surface of the bare wire passing through the through hole 111, so as to cover the outside of the bare wire to form a sheath. The outer shell 12 is provided with a glue injection flow channel 1212 connected to the glue injection cavity 1201, and the raw materials (coating layer raw materials) for manufacturing the sheath enter the glue injection cavity 1201 through the glue injection flow channel 1212, so as to realize the continuous processing and manufacturing of the wire;

[0095] The magnetic field orientation device 20 includes a detachable magnetic field generating component 21 connected to the shell 12. The magnetic field generating component 21 is configured to perform magnetic field orientation on the sheath of the wire. Specifically, the magnetic field generating component 21 can generate a magnetic field, and use the generated magnetic field to perform magnetic field orientation on the sheath of the wire. The magnetic field generating component 21 is provided with a channel 2101 for the wire to pass through. The channel 2101 is coaxially connected to the through hole 111 through the extrusion port 1221, that is, the axis of the channel 2101, the axis of the extrusion port 1221, and the axis of the through hole 111 are collinear. After the wire passes through the extrusion port 1221, the sheath is still in a molten state. After the wire enters the channel 2101, the magnetic field generating component 21 will perform magnetic field orientation on the sheath in a molten state. Specifically, the magnetic field generating component 21 will form magnetic lines of force, and the magnetic lines of force will act on the sheath in a molten state, so that the grains of the magnetic material in the sheath are arranged along the direction of the magnetic field, so that the manufactured sheath has a magnetic adsorption function.

[0096] It should be noted that Figure 1 In the figure, the direction of arrow is the flow direction of raw materials.

[0097] The wire extrusion die of the present application can orient the sheath in a molten state in the magnetic field by setting a magnetic field orientation device 20, so that the grains of the magnetic material in the sheath are arranged along the direction of the magnetic field, so that the manufactured sheath has a magnetic adsorption function, and after the wire is formed, the magnetic attraction performance of the sheath can be improved by further magnetization.

[0098] Further, if Figure 1 As shown, a silicone tube 112 is provided in the core mold 11, and the outer wall surface of the silicone tube 112 is tightly fitted with the inner wall surface of the through hole 111. The inner hole of the silicone tube 112 allows the bare wire to pass through. The silicone tube 112 can not only play a limiting and guiding role for the bare wire passing through, so that the bare wire can move more smoothly, but also prevent the raw material in the injection cavity 1201 from flowing back through the through hole 111 and affecting the surface flatness of the sheath.

[0099] Going further, Figure 1As shown, one end of the core mold 11 adjacent to the insertion port 1211 is the inlet end, which is located outside the shell 12, and is connected to a cap 113. Specifically, an outer peripheral surface of the inlet end is provided with an external thread, and the cap 113 is provided with an internal thread. The cap 113 is connected to the inlet end by screwing the internal thread and the external thread together. A first jack 1131 is provided on the cap 113, and a silicone pressure cap 114 is sandwiched between the cap 113 and the inlet end. The silicone pressure cap 114 abuts against the silicone tube 112. By adjusting the tightening degree of the cap 113, the squeezing force applied by the silicone pressure cap 114 to the silicone tube 112 can be adjusted. A second jack 1141 is provided on the silicone pressure cap 114, and the first jack 1131, the second jack 1141 and the inner hole of the silicone tube 112 are coaxially connected in sequence to ensure that the bare wire can smoothly pass through the cap 113 and the silicone pressure cap 114 into the silicone tube 112 in sequence.

[0100] During processing, the silicone pressure cap 114 is tightly abutted against the end of the silicone tube 112 adjacent to the wire inlet end by screwing the cover cap 113 together with the wire inlet end, so that the silicone tube 112 is squeezed to block the wire outlet end (the end opposite to the wire inlet end) of the core mold 11, effectively preventing the coating layer raw material from flowing back into the core mold 11 during the extrusion process, causing blockage in the flow channel and increasing the resistance to wire extraction, so that the wire can be smoothly extracted from the wire extrusion mold.

[0101] Further, if Figure 1 As shown, the housing 12 includes a core mold seat 121 and a mold sleeve seat 122, wherein:

[0102] The core mold seat 121 has a cylindrical accommodating cavity, the diameter of which matches the outer diameter of the core mold 11, the insertion port 1211 is arranged at the first end of the core mold seat 121, and the glue injection channel 1212 is arranged on the core mold seat 121. Preferably, the glue injection channel 1212 includes a main channel and a branch channel, the first end of each branch channel is connected to the main channel, and the second end of each branch channel is connected to the glue injection cavity 1201. The arrangement of the branch channel allows the raw material to be uniformly injected into the glue injection cavity 1201, so that the outer surface of the bare wire can be evenly wrapped with the raw material;

[0103] The mold sleeve seat 122 has a conical receiving cavity, and the first end of the mold sleeve seat 122 is detachably connected to the second end of the core mold seat 121. Specifically, the mold sleeve seat 122 is detachably connected to the core mold seat 121 through a clamping nut 124, and the large diameter end of the conical receiving cavity is connected to the cylindrical receiving cavity. The wire outlet end of the core mold 11 is located in the conical receiving cavity. The raw material can flow smoothly to the wire outlet end of the core mold 11 under the guidance of the inner surface of the conical receiving cavity, thereby smoothly covering the outside of the bare wire extending from the wire outlet end of the core mold 11. The extrusion port 1221 is set at the second end of the mold sleeve seat 122, and the wire (the sheath is in a molten state) can enter the magnetic field orientation component through the extrusion port 1221.

[0104] In a specific example of this embodiment, a mold sleeve 1222 is also embedded in the mold sleeve seat 122, and the mold sleeve 1222 can shape the sleeve to ensure the flatness of the outer surface of the sleeve. The specific connection relationship between the mold sleeve 1222 and the mold sleeve seat 122 is the existing technology and will not be repeated here.

[0105] Going further, Figure 1 As shown, the shell 12 also includes a glue injection seat 123, and the glue injection seat 123 is connected to the core mold seat 121. Specifically, the glue injection seat 123 is connected to the core mold seat 121 through a thread. The specific thread connection method is the existing technology and will not be repeated here. The glue injection seat 123 is provided with a glue injection through hole 1231 connected to the glue injection channel 1212. The raw material can be continuously passed into the glue injection channel 1212 through the glue injection through hole 1231. The setting of the glue injection seat 123 makes the operation of injecting raw materials simple and convenient.

[0106] Further, if Figure 1 As shown, the magnetic field orientation device 20 also includes a connecting plate 22 connected to the first end of the magnetic field generating component 21, and the magnetic field generating component 21 is connected to the outer shell 12 through the connecting plate 22. Specifically, the outer peripheral surface of the mold sleeve seat 122 of the outer shell 12 is provided with an external thread, and the connecting plate 22 is provided with an internal thread. The connecting plate 22 is connected to the outer shell 12 through the screwing cooperation of the internal thread and the external thread, and the connecting plate 22 is connected to the magnetic field generating component 21 through screws. The above connection methods are simple and convenient, thereby simplifying the assembly of the wire extrusion mold.

[0107] Going further, Figure 1 As shown, the magnetic field orientation device 20 also includes a pressure cover 23 connected to the second end of the magnetic field generating component 21. Specifically, the pressure cover 23 is connected to the magnetic field generating component 21 by screws. An outlet port 231 is provided on the pressure cover 23. The outlet port 231 is coaxially connected to the channel 2101. The pressure cover 23 can protect the magnetic field generating component 21 to prevent the magnetic field generating component 21 from being damaged by external influences, thereby ensuring the service life of the magnetic field generating component 21.

[0108] Further, if Figure 1 , Figure 2 and Figure 3 As shown, a silicone rubber positioning ring 24 is sandwiched between the pressure cover 23 and the magnetic field generating component 21. The silicone rubber positioning ring 24 is coaxially connected to the channel 2101 and the wire outlet port 231. The silicone rubber positioning ring 24 can prevent the wire from being eccentric when it is pulled out through the wire outlet port 231, resulting in increased pulling resistance and reduced wire pulling speed, so that the wire can be smoothly pulled out after being oriented in the magnetic field.

[0109] Furthermore, the length of the channel 2101 is less than or equal to 8 cm to ensure that the outer jacket is still in a molten state when passing through the magnetic field orientation device 20, so as to facilitate the magnetic field orientation operation of the outer jacket.

[0110] In a specific example of this application, Figure 1 , Figure 2 and Figure 3 As shown, the magnetic field generating assembly 21 includes a first magnetic conductor 211, a second magnetic conductor 212, a first permanent magnet 213 and a second permanent magnet 214, wherein:

[0111] The first magnetic conductor 211 has a first docking surface 2111, and a first groove is arranged on the first docking surface 2111. Specifically, the first groove is located in the middle of one end of the first docking surface 2111.

[0112] The second magnetic conductor 212 has a second docking surface 2121, which is configured to be connected to the first docking surface 2111. A second groove is provided on the second docking surface 2121. Specifically, the first groove is located in the middle of one end of the first docking surface 2111, and when the second docking surface 2121 is connected to the first docking surface 2111, the first groove and the second groove are docked to form a channel 2101. Specifically, the second docking surface 2121 is connected to the first docking surface 2111 by screws.

[0113] The first permanent magnet 213 is sandwiched between the first magnetic conductor 211 and the second magnetic conductor 212;

[0114] The second permanent magnet 214 is sandwiched between the first magnetic conductor 211 and the second magnetic conductor 212, and the second permanent magnet 214 and the first permanent magnet 213 are respectively located on opposite sides of the channel 2101, and magnetic lines of force are generated between the first permanent magnet 213 and the second permanent magnet 214, and the magnetic lines of force pass through the channel 2101 to orient the magnetic field of the molten sheath in the channel 2101.

[0115] Preferably, the coercive force of the magnetic material selected for the first magnet 211 and the second magnet 212 is in the range of 1kOe to 10kOe, and the first permanent magnet 213 and the second permanent magnet 214 use sintered NdFeB permanent magnets or sintered SmCo permanent magnets with good temperature resistance. In this embodiment, rare earth sintered permanent magnets - sintered SmCo permanent magnets with better temperature performance are preferred.

[0116] Further, if Figure 1 As shown, the magnetic field orientation device 20 further includes a heating assembly 215, and the heating assembly 215 includes a first heating plate 2151, a second heating plate 2152 and a controller 2153, wherein:

[0117] The first heating plate 2151 is connected to the outer surface of the first magnetic conductor 211, and the first heating plate 2151 can heat the first magnetic conductor 211;

[0118] The second heating plate 2152 is connected to the outer surface of the second magnetic conductor 212, and the second heating plate 2152 can heat the second magnetic conductor 212;

[0119] The controller 2153 is electrically connected to the first heating plate 2151 and the second heating plate 2152. The controller 2153 is configured to adjust the temperature of the first heating plate 2151 and the second heating plate 2152. Specifically, the controller 2153 adjusts the temperature of the first heating plate 2151 and the second heating plate 2152 in the range of 130°C to 180°C to ensure that the sheath entering the magnetic field orientation device 20 is still in a molten state, thereby facilitating the magnetic field orientation device 20 to perform magnetic field orientation on the sheath.

[0120] Furthermore, the magnetic field generating assembly 21 further includes a first thermal insulation layer 2131 and a second thermal insulation layer 2141, wherein:

[0121] The first heat insulation layer 2131 is coated on the outer surface of the first permanent magnet 213 that is not in contact with the first magnetic conductor 211 and the second magnetic conductor 212. The first heat insulation layer 2131 can protect the first permanent magnet 213 to reduce the thermal magnetic loss of the first permanent magnet 213 in the heating state.

[0122] The second thermal insulation layer 2141 covers the outer surface of the second permanent magnet 214 that is not in contact with the first magnetic conductor 211 and the second magnetic conductor 212. The second thermal insulation layer 2141 can protect the second permanent magnet 214 to reduce the thermal magnetic loss of the second permanent magnet 214 in the heated state.

[0123] Furthermore, the magnetic field generating assembly 21 further includes a first half mold 2161 and a second half mold 2162, wherein:

[0124] The first half mold 2161 is disposed in the first groove;

[0125] The second half mold 2162 is arranged in the second groove. When the first groove and the second groove are connected, the first half mold 2161 and the second half mold 2162 are connected to form a magnetic field core mold 216. The magnetic field core mold 216 has a through hole allowing the wire to pass through. The setting of the magnetic field core mold 216 can guide the passage of the wire, so that the wire can pass through the magnetic field generating component 21 more smoothly.

[0126] Preferably, considering that the wire sheath contains metal powder, the magnetic field core mold 216 is made of a material with excellent surface smoothness and hardness (steel HPM75) to increase the hardness and smoothness of the flow channel material, thereby reducing friction and reducing the resistance when the wire passes through, thereby improving the wear resistance and service life of the magnetic field core mold 216 and improving material fluidity.

[0127] Furthermore, the magnetic field generating component 21 also includes a third thermal insulation layer 2163 covering the outside of the magnetic field core mold 216. The third thermal insulation layer 2163 can reduce the heat transfer of the sheath to the outside to further ensure that the sheath entering the magnetic field orientation device 20 is still in a molten state, thereby facilitating the magnetic field orientation device 20 to orient the sheath in the magnetic field.

[0128] It should be noted that, in this embodiment, the coercive force of the magnetic material selected for the first magnetic conductor 211 and the second magnetic conductor 212 must be no less than 10 kOe after being heated.

[0129] Embodiment 2

[0130] The present embodiment provides a wire extrusion die, which is substantially the same as the wire extrusion die of the first embodiment. The wire extrusion die of the present embodiment differs from the wire extrusion die of the first embodiment in the structure of the magnetic field generating component 21 .

[0131] Specifically, Figure 4 As shown, the magnetic field generating assembly 21 of this embodiment includes a plurality of fan-shaped third permanent magnets 217, a metal fastening ring 218 and a heating ring, wherein:

[0132] The plurality of third permanent magnets 217 are enclosed to form a ring shape and form a ring-shaped Halbach array structure, and the inner hole of the ring-shaped Halbach array structure forms a channel 2101. Specifically, Figure 4 In the illustrated embodiment, the magnetic field generating assembly 21 includes 8 third permanent magnets 217 at an angle of 45 degrees, each third permanent magnet 217 has an outer diameter of 60 mm, and the inner diameter of the formed channel 2101 does not exceed 20 mm;

[0133] The metal fastening ring 218 is sleeved on the outside of the plurality of third permanent magnets 217. Specifically, the metal fastening ring 218 is an aluminum alloy ring, and the outer diameter of the metal fastening ring 218 is 90 mm. The plurality of third permanent magnets 217 are fastened and connected by the metal fastening ring 218.

[0134] The heating ring 2181 is sleeved on the outside of the metal fastening ring 218. The heating range of the heating ring 2181 is 130°C to 180°C to ensure that the sheath entering the magnetic field orientation device 20 is still in a molten state, thereby facilitating the magnetic field orientation device 20 to orient the sheath in the magnetic field.

[0135] It should be noted that in Figure 4 In the figure, the direction of the arrow is the magnetization direction of the magnet.

[0136] Furthermore, the magnetic field generating component 21 also includes a magnetic field core mold 216, which is embedded in the inner hole of the annular Halbach array structure. The magnetic field core mold 216 is provided with perforations allowing the wire to pass through. The setting of the magnetic field core mold 216 can guide the passage of the wire, thereby allowing the wire to pass through the magnetic field generating component 21 more smoothly.

[0137] Preferably, considering that the wire sheath contains metal powder, the magnetic field core mold 216 is made of a material with excellent surface smoothness and hardness (steel HPM75) to increase the hardness and smoothness of the flow channel material, thereby reducing friction and reducing the resistance when the wire passes through, thereby improving the wear resistance and service life of the magnetic field core mold 216 and improving material fluidity.

[0138] Embodiment 3

[0139] The present embodiment provides a wire extrusion die, which is substantially the same as the wire extrusion die of the first embodiment. The wire extrusion die of the present embodiment differs from the wire extrusion die of the first embodiment in the structure of the magnetic field generating component 21 .

[0140] Specifically, Figure 5 As shown, the magnetic field generating assembly 21 includes an electromagnet 219 and a magnetic field core mold 216, wherein:

[0141] The N pole and S pole of the electromagnet 219 are arranged opposite to each other, and there is a gap between the N pole and S pole of the electromagnet 219. Specifically, the electromagnet 219 is in a ring shape with a gap, so that the N pole and S pole of the electromagnet 219 are arranged opposite to each other. The N pole and S pole of the electromagnet 219 are respectively connected to the magnetic pole head 2191, and the magnetic pole head 2191 is trapezoidal to enhance the magnetic concentration effect. The upper ends of the two magnetic pole heads 2191 are soft iron magnetic poles 2192 and magnetic conductive materials (yoke iron 2193) respectively. The magnetic conductive materials are connected to form a magnetic field loop. Coils 2194 are arranged on both sides of each magnetic pole, and the magnetic lines of force of the coils 2194 on both sides of the same magnetic pole are in the same direction.

[0142] The magnetic field core mold 216 is clamped in the gap, and a channel 2101 is arranged on the magnetic field core mold 216. The arrangement of the magnetic field core mold 216 can guide the passage of the wire, so that the wire can pass through the magnetic field generating component 21 more smoothly.

[0143] It should be noted that, in this embodiment, the distance between the magnetic field core mold 216 and the extrusion port 1221 does not exceed 2 mm, the boundary of the magnetic field core mold 216 and the part within the straight line connection between the trapezoidal vertex edge of the magnetic pole head 2191 are made of magnetic conductive materials, and other parts are made of non-magnetic conductive materials.

[0144] Preferably, considering that the wire sheath contains metal powder, the magnetic field core mold 216 is made of a material with excellent surface smoothness and hardness (steel HPM75) to increase the hardness and smoothness of the flow channel material, thereby reducing friction and reducing the resistance when the wire passes through, thereby improving the wear resistance and service life of the magnetic field core mold 216 and improving material fluidity.

[0145] Compared with permanent magnets, the electromagnet 219 can easily obtain an orientation magnetic field of more than 20 kOe, and the magnetic field is not weakened by temperature.

[0146] Embodiment 4

[0147] The present embodiment provides a wire, which is made by the wire extrusion die mentioned above. Therefore, the sheath of the wire of the present embodiment has magnetic adsorption capability, and the magnetic adsorption performance can be improved by further magnetization.

[0148] Furthermore, the sheath of the wire is a sheath made of anisotropic magnetic material. Specifically, the anisotropic magnetic material includes anisotropic samarium iron nitrogen and / or anisotropic neodymium iron nitrogen. The base material of the sheath is PVC (polyvinyl chloride), TPE (thermoplastic elastomer), TPU (thermoplastic polyurethanes) and polyamide resin and other materials, and processing aids such as halogen-free flame retardant materials can be added as needed.

[0149] Specifically, the components of the materials used to make the sheath in this application are as follows:

[0150] 55wt% to 75wt% of magnetic powder;

[0151] 15wt% to 25wt% of a binder;

[0152] 3.5 wt% to 30 wt% of processing aid.

[0153] Among them, the magnetic powder includes anisotropic samarium iron nitrogen magnetic powder and / or anisotropic neodymium iron nitrogen magnetic powder. The samarium iron nitrogen magnetic powder with a specific particle size range and distribution characteristics and uniform magnetism can be well combined with thermoplastic elastomers, etc., and has high magnetic properties while ensuring that the surface of the wire sheath is smooth, flexible and tough, and is particularly suitable for preparing wires for data cables. In addition, based on the characteristics of nitrides, it has good corrosion resistance and oxidation resistance.

[0154] It should be noted that flame retardants may or may not be added to the processing aids.

[0155] Specifically, the x10 particle size of the anisotropic samarium iron nitrogen magnetic powder that can be used in the present application is 0.6μm to 1.0μm, the x50 particle size is 1.9μm to 2.4μm, and the x99 particle size is 5.5μm to 7.2μm. Furthermore, the maximum magnetic energy product (BH) max of the samarium iron nitrogen magnetic powder is 28MGOe to 41MGOe, the remanence (Br) is 12.5kGs to 15.0kGs, and the intrinsic coercive force (Hcj) is 8.0kOe to 12.0kOe. This type of magnetic powder is a permanent magnetic powder with strong magnetic properties and submicron particle size.

[0156] Among them, "x10 particle size" means that in the particle size distribution of the magnetic powder, particles smaller than "x10 particle size" account for 10% of the total number of particles; "x90 particle size" means that in the particle size distribution of the magnetic powder, particles larger than "x90 particle size" account for 10% of the total number of particles; "x50 particle size" means the median particle size of the magnetic powder. In the particle size distribution, particles smaller than "x50 particle size" and particles larger than "x50 particle size" each account for 50%. These test data can be obtained by measuring with a laser particle size analyzer.

[0157] In a specific example of this embodiment, the magnetic powder may also contain a total amount of 0 to 40 wt% of ferrite magnetic powder. At this time, the total amount of anisotropic samarium iron nitride magnetic powder and / or anisotropic neodymium iron nitride magnetic powder can be 30 wt% to 75 wt%. In order to match the samarium iron nitride magnetic powder and / or neodymium iron nitride magnetic powder, the x50 particle size of these ferrite magnetic powders can generally be 1.4 μm to 2.0 μm.

[0158] Combining ferrite magnetic powder with SmFeN magnetic powder can save costs while ensuring magnetic properties. In particular, it can reduce the use of flame retardants. The required flame retardant level can still be achieved without using flame retardants or with a small amount of flame retardants.

[0159] In one embodiment, based on the total weight of the magnetic powder, the total amount of SmFeN magnetic powder and / or NdFeN magnetic powder may be 30 wt % to 100 wt %, and the total amount of ferrite magnetic powder may be 0 wt % to 70 wt %.

[0160] The role of the binder in the material used to manufacture the sheath in the present application is to increase the fluidity of the magnetic powder particles and the bonding strength between them, and to give the magnet mechanical properties and corrosion resistance. The choice of the binder can be determined according to the application requirements. Usually, a binder with a melting point between 80°C and 200°C can be selected, which can still have certain tensile properties after being formed in a mold in a high-temperature molten state and cooled. In addition, a thermoplastic elastic material with good fluidity, strong bonding force, high bonding strength, low water absorption and good dimensional stability is usually selected.

[0161] In one embodiment, the binder is preferably one or more of styrene-based thermoplastic elastomers, olefin-based thermoplastic elastomers, diene-based thermoplastic elastomers, vinyl chloride-based thermoplastic elastomers, urethane-based thermoplastic elastomers (TPU), ester-based thermoplastic elastomers (TPE), amide-based (TPAE) thermoplastic elastomers, organic fluorine-based (TPF) thermoplastic elastomers, thermoplastic resins (EEA) and silicone-based thermoplastic elastomers.

[0162] Among these materials, PVC (polyvinyl chloride), TPE (thermoplastic elastomer), TPU (thermoplastic polyurethanes) and polyamide resin are more preferred. The above-mentioned adhesive can achieve the following effects: the material has good flexibility and good molding fluidity.

[0163] Among them, the adhesive is more preferably a combination of urethane (TPU) thermoplastic elastomer and ester (TPE) thermoplastic elastomer. This adhesive can ensure the toughness of the material while ensuring the tensile and bending properties of the sheath material, and is suitable for cable application requirements such as data cables.

[0164] In addition, the binder can also be selected from: at least one of styrenes (SBS, SIS, SEBS, SEPS), olefins (TPO, TPV), dienes (TPB, TPI), vinyl chlorides (TPVC, TCPE), urethanes (TPU), esters (TPEE), amides (TPAE), organic fluorines (TPF), silicones and ethylenes. Furthermore, according to actual use needs, the selection range may also include at least one of chlorinated polyethylene, polyamide resin, thermoplastic polyimide, liquid crystal polymer, polyphenylene sulfide, polyphenylene ether, polyolefin, modified polyolefin, polycarbonate, polymethyl methacrylate, polyether, polyether ketone, polyetherimide, polyoxymethylene and chlorosulfonated polyethylene, and / or at least one of copolymers, blends and polymer alloys formed based on at least one of chlorinated polyethylene, polyamide resin, thermoplastic polyimide, liquid crystal polymer, polyphenylene sulfide, polyphenylene ether, polyolefin, modified polyolefin, polycarbonate, polymethyl methacrylate, polyether, polyether ketone, polyetherimide, polyoxymethylene and chlorosulfonated polyethylene.

[0165] Among them, the polyamide resin can be, for example, nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6-12 and nylon 6-66; the liquid crystal polymer can be an aromatic polyester; and the polyolefin can be polyethylene or polypropylene.

[0166] It should be noted that, for processing and application needs, the material used to manufacture the sheath also contains some processing aids, such as at least one of a coupling agent, a plasticizer, a lubricant, an antioxidant and a flame retardant, which can be determined according to the selected adhesive and application requirements.

[0167] These coupling agents, plasticizers, lubricants, and flame retardants can be made of conventional materials and can be selected according to requirements.

[0168] Among them, plasticizers and lubricants can improve the performance of the sheath material, and at the same time can simplify processing conditions and improve processing efficiency to a certain extent; flame retardants are used in conjunction with thermoplastic elastomers to increase the applicability of the material in consumer electronic products such as data cables and meet strict safety requirements.

[0169] Specifically, the coupling agent includes a titanate coupling agent and / or a silane coupling agent;

[0170] The plasticizer includes at least one of dioctyl phthalate DOP, stearate, fatty acid, phosphate, benzene polyester and alkyl sulfonate;

[0171] The lubricant comprises at least one of silicone oil, wax, fatty acid, oleic acid, polyester, synthetic ester, carboxylic acid, alumina, silicon dioxide and titanium dioxide;

[0172] Flame retardants include organic flame retardants, inorganic flame retardants, halogen flame retardants (organic chlorides and organic bromides) and halogen-free flame retardants. Among them, organic flame retardants include but are not limited to flame retardants with bromine, phosphorus-nitrogen, nitrogen and red phosphorus and compounds as main components, and inorganic flame retardants include but are not limited to flame retardants with antimony trioxide, magnesium hydroxide, aluminum hydroxide and silicon as main components.

[0173] In this embodiment, a halogen-free flame retardant is preferred, such as a polyester-based halogen-free flame retardant.

[0174] It should be noted that in certain embodiments of the present application, since the magnetic powder contains ferrite powder, the ferrite powder can achieve a flame retardant effect alone or in combination with a flame retardant, and the ferrite powder itself is magnetic, which can reduce the degree of magnetic performance loss due to the addition of non-magnetic flame retardants. Therefore, in the sheath material containing ferrite powder, based on the total weight of the sheath material, the amount of flame retardant can be 0wt% to 25wt%, for example, 5wt% to 25wt%.

[0175] The maximum magnetic energy product (BH) max of the above-mentioned sheath material is between 1.0MGOe and 4.0MGOe, the tensile strength is between 1MPa and 2MPa, the elongation at break is between 2% and 4%, and the Shore hardness is below 90A. There is no need to add flame retardants to the sheath material, and it can also achieve a certain flame retardant level (such as VW-2). After adding flame retardants, the wire can reach the flame retardant level of VW-1 as a whole. Preferably, in order to improve the flame retardancy of the manufactured wire, a flame retardant treatment process can be added after the sheath is processed and formed.

[0176] The wire processing process of this application is described in detail below:

[0177] S1. Prepare the raw materials of the sheath, the components of which are as follows:

[0178] 55wt% to 75wt% of magnetic powder;

[0179] 15 wt% to 25 wt% of a binder;

[0180] 3.5 wt% to 30 wt% of a processing aid;

[0181] When the magnetic powder contains samarium iron nitrogen magnetic powder, the x50 particle size of the samarium iron nitrogen magnetic powder is 1.9 μm to 2.4 μm; when the magnetic powder contains neodymium iron nitrogen magnetic powder, the x50 particle size of the neodymium iron nitrogen magnetic powder is 1.5 μm to 2.0 μm;

[0182] S2, mixing the above raw materials evenly and kneading at 120°C to 200°C to obtain a sheath raw material;

[0183] S3. The mixed sheath raw material is put into the wire extrusion die through an extruder. At the same time, the bare wire is inserted into the wire extrusion die from the wire inlet end. The sheath semi-finished product in a molten state between 130°C and 200°C is oriented in the magnetic field in the wire extrusion die, and the wire with magnetic sheath is obtained through subsequent processes.

[0184] Among them, the materials of magnetic powder include anisotropic samarium iron nitride magnetic powder, ferrite magnetic powder, and anisotropic neodymium iron nitride magnetic powder.

[0185] Specifically, anisotropic SmFeN magnetic powder can be:

[0186] The first anisotropic SmFeN magnetic powder has the following properties: maximum magnetic energy product (BH) max38.7MGOe, remanence (Br) of 14.7kGs, intrinsic coercive force (Hcj) of 11.5kOe, x10 of 0.71μm, x50 particle size of 2.10μm, and x99 of 6.55μm.

[0187] The second type of anisotropic SmFeN magnetic powder has the following properties: maximum magnetic energy product (BH) max28.8MGOe, remanence (Br) of 12.9kGs, intrinsic coercive force (Hcj) of 8.5kOe, x10 of 0.82μm, x50 particle size of 2.36μm, and x99 of 7.14μm.

[0188] The third type of anisotropic SmFeN magnetic powder has the following properties: maximum magnetic energy product (BH) max32.2MGOe, remanence (Br) of 13.5kGs, intrinsic coercive force (Hcj) of 9.0kOe, x10 of 0.85μm, x50 particle size of 2.45μm, and x99 of 7.95μm.

[0189] Ferrite powder can be used:

[0190] The first type of ferrite powder has a maximum magnetic energy product (BH) of max1.8MGOe, a remanence (Br) of 1.82kGs, an intrinsic coercive force (Hcj) of 2.92kOe, and an average particle size of 1.48μm.

[0191] The second type of ferrite powder has a maximum magnetic energy product (BH) of max0.7MGOe, a remanence (Br) of 1.74kGs, an intrinsic coercive force (Hcj) of 2.76kOe, and an average particle size of 1.69μm.

[0192] The third type of ferrite powder has a maximum magnetic energy product (BH) of max0.6MGOe, a remanence (Br) of 1.65kGs, an intrinsic coercive force (Hcj) of 2.64kOe, and an average particle size of 1.90μm.

[0193] Anisotropic NdFeN magnetic powder can be used:

[0194] The first anisotropic NdFeN magnetic powder has the following properties: maximum magnetic energy product (BH) max20.3MGOe, remanence (Br) of 12.5kGs, intrinsic coercive force (Hcj) of 6.5kOe, x10 of 0.56μm, x50 particle size of 1.87μm, and x99 of 5.55μm.

[0195] The second type of anisotropic NdFeN magnetic powder has the following properties: maximum magnetic energy product (BH) max16.5MGOe, remanence (Br) of 11.9kGs, intrinsic coercive force (Hcj) of 5.0kOe, x10 of 0.75μm, x50 particle size of 1.92μm, and x99 of 5.86μm.

[0196] The third type of anisotropic NdFeN magnetic powder has the following properties: maximum magnetic energy product (BH) max10.2MGOe, remanence (Br) of 11.5kGs, intrinsic coercive force (Hcj) of 3.5kOe, x10 of 0.92μm, x50 particle size of 2.10μm, and x99 of 6.33μm.

[0197] Binders include:

[0198] TPU1 uses Elastollan BCF 45A12P produced by BASF, with a Shore hardness of 48A.

[0199] TPU2 uses Elastollan SP1150A15P produced by BASF, with a Shore hardness of 50A.

[0200] TPU3 uses Elastollan 1170A10 produced by BASF, with a Shore hardness of 71A.

[0201] TPE1 uses TF3ZGO-LCNT produced by Germany's JETTE, with a Shore hardness of 00-30A.

[0202] TPE2 uses TF5ZGO-LCNT produced by Germany's JETTE, with a Shore hardness of 00-50A.

[0203] TPE3 uses SHF 50A-3S1981 produced by American GLS, with a Shore hardness of 50A.

[0204] Processing aids include:

[0205] The lubricant is PMX-200 silicone oil.

[0206] The flame retardant selected is KSW-03 halogen-free phosphorus-nitrogen flame retardant.

[0207] Performance Testing Methods

[0208] 1. Use NIM-200C magnetic measurement system to detect magnetic properties.

[0209] 2. Use a Gauss meter to detect the surface magnetic flux density.

[0210] 3. Use a universal testing machine to test the tensile strength (test standard is ASTM D638) and elongation at break (ASTMD412).

[0211] 4. Use a vertical burning tester to conduct a vertical burning test, the measurement standard is UL1581.

[0212] In an example of this embodiment, the outside of the sheath is covered with a braided layer or a silicone layer, and the braided layer or the silicone layer can protect the sheath.

[0213] Furthermore, the wire is a data wire, a power wire or a signal wire.

[0214] The manufacturing process of the wire material of the present application is described below with the above materials combined with specific examples:

[0215] Example 1

[0216] 1. Prepare a sheath material, which includes the following raw materials in parts by weight:

[0217]

[0218] 2. The sheath material is extruded through a wire extrusion die equipped with a magnetic field orientation device (the structure of Example 1). After heating and keeping the temperature constant for 1 hour, the orientation magnetic field of the wire extrusion die is measured using a Gauss meter to be 10.2 kOe.

[0219] The first permanent magnet and the second permanent magnet are both made of N52SH sintered NdFeB, the first magnetic conductor and the second magnetic conductor are made of SKD61; the first thermal insulation material and the second thermal insulation material are made of bakelite.

[0220] The sheath thickness of the finished wire is 0.6mm. A gauss meter is used to closely contact the S pole of the sheath orientation direction of the finished wire product, and the surface magnetic flux density is detected to be 500Gs. The flame retardant grade is VW-2.

[0221] Example 2

[0222] 1. Prepare a sheath material, which includes the following raw materials in parts by weight:

[0223]

[0224] 2. The sheath material is extruded through a wire extrusion die equipped with a magnetic field orientation device (the structure of Example 1). After heating and keeping the temperature constant for 1 hour, the orientation magnetic field of the wire extrusion die is measured using a Gauss meter to be 10.2 kOe.

[0225] The first permanent magnet and the second permanent magnet are both made of N52SH sintered NdFeB, the first magnetic conductor and the second magnetic conductor are made of SKD61; the first thermal insulation material and the second thermal insulation material are made of bakelite.

[0226] The sheath thickness of the finished wire is 0.6mm. A gauss meter is used to closely contact the S pole of the sheath orientation direction of the finished wire product, and the surface magnetic flux density is detected to be 600Gs. The flame retardant grade is VW-2.

[0227] Example 3

[0228] 1. Prepare a sheath material, which includes the following raw materials in parts by weight:

[0229]

[0230] 2. The sheath material is extruded through a wire extrusion die equipped with a magnetic field orientation device (the structure of Example 1). After heating and keeping the temperature constant for 1 hour, the orientation magnetic field of the wire extrusion die is measured using a Gauss meter to be 10.2 kOe.

[0231] The first permanent magnet and the second permanent magnet are both made of N52SH sintered NdFeB, the first magnetic conductor and the second magnetic conductor are made of SKD61; the first thermal insulation material and the second thermal insulation material are made of bakelite.

[0232] The sheath thickness of the finished wire is 0.6mm. A gauss meter is used to closely contact the S pole of the sheath orientation direction of the finished wire product, and the surface magnetic flux density is detected to be 550Gs. The flame retardant grade is VW-1.

[0233] Example 4

[0234] 1. Prepare a sheath material, which includes the following raw materials in parts by weight:

[0235]

[0236] 2. The sheath material is extruded through a wire extrusion die equipped with a magnetic field orientation device (the structure of Example 2). After heating and keeping the temperature constant for 1 hour, the orientation magnetic field of the wire extrusion die is measured using a Gauss meter to be 12 kOe.

[0237] Among them, permanent magnets are all made of N52SH sintered NdFeB.

[0238] The sheath thickness of the finished wire is 0.6mm. A gauss meter is used to closely contact the S pole of the sheath orientation direction of the finished wire product, and the surface magnetic flux density is detected to be 600Gs. The flame retardant grade is VW-2.

[0239] Example 5

[0240] 1. Prepare a sheath material, which includes the following raw materials in parts by weight:

[0241]

[0242] 2. The sheath material is extruded through a wire extrusion die equipped with a magnetic field orientation device (the structure of Example 2). After heating and keeping the temperature constant for 1 hour, the orientation magnetic field of the wire extrusion die is measured using a Gauss meter to be 12 kOe.

[0243] Among them, permanent magnets are all made of N52SH sintered NdFeB.

[0244] The sheath thickness of the finished wire is 0.6mm. A gauss meter is used to closely contact the S pole of the sheath orientation direction of the finished wire. The surface magnetic flux density is detected to be 600Gs, and the flame retardant grade is VW-1.

[0245] Example 6

[0246] 1. Prepare a sheath material, which includes the following raw materials in parts by weight:

[0247]

[0248] 2. The sheath material is extruded through a wire extrusion die equipped with a magnetic field orientation device (the structure of Example 2). After heating and keeping the temperature constant for 1 hour, the orientation magnetic field of the wire extrusion die is measured using a Gauss meter to be 12 kOe.

[0249] Among them, permanent magnets are all made of N52SH sintered NdFeB.

[0250] The sheath thickness of the finished wire is 0.6mm. A gauss meter is used to closely contact the S pole of the sheath orientation direction of the finished wire product, and the surface magnetic flux density is detected to be 650Gs. The flame retardant grade is VW-1.

[0251] Example 7

[0252] 1. Prepare a sheath material, which includes the following raw materials in parts by weight:

[0253]

[0254] 2. The above-mentioned sheath raw material is extruded through a wire extrusion die (structure of Example 3) equipped with a magnetic field orientation device. The orientation magnetic field size of the wire extrusion die is measured using a Gauss meter and is 21 kOe.

[0255] The sheath thickness of the manufactured wire is 0.6 mm. A gauss meter is used to closely contact the S pole of the sheath orientation direction of the finished wire product, and the surface magnetic flux density is detected to be 750 Gs.

[0256] Example 8

[0257] 1. Prepare the outer sheath material. The sheath layer base material includes the following raw materials in parts by weight:

[0258]

[0259] 2. The above-mentioned sheath raw material is extruded through a wire extrusion die (structure of Example 3) equipped with a magnetic field orientation device. The orientation magnetic field size of the wire extrusion die is measured using a Gauss meter and is 21 kOe.

[0260] The sheath thickness of the finished wire is 0.6mm. A gauss meter is used to closely contact the S pole of the sheath orientation direction of the finished wire product, and the surface magnetic flux density is detected to be 700Gs. The flame retardant grade is VW-1.

[0261] Example 9

[0262] 1. Prepare the outer sheath material. The sheath layer base material includes the following raw materials in parts by weight:

[0263]

[0264] 2. The above-mentioned sheath raw material is extruded through a wire extrusion die (structure of Example 3) equipped with a magnetic field orientation device. The orientation magnetic field size of the wire extrusion die is measured using a Gauss meter and is 21 kOe.

[0265] The sheath thickness of the finished wire is 0.6mm. A gauss meter is used to closely contact the S pole of the sheath orientation direction of the finished wire product, and the surface magnetic flux density is detected to be 700Gs. The flame retardant grade is VW-1.

[0266] The magnetic and mechanical properties of the above examples are as follows:

[0267]

[0268] In summary, the wire extrusion die of the present application has a simple structure, is easy to use, and has a low production cost, which is conducive to the production of magnetic adsorption wires for electronic products, and can solve the problems of messy wires, difficulty in storage, and easy damage;

[0269] The wire extrusion die of the present application can orient the sheath in a molten state by providing a magnetic field orientation device, so that the grains of the magnetic material contained in the sheath are arranged along the direction of the magnetic field, so that the manufactured sheath has a magnetic adsorption function, and after the wire is formed, the magnetic adsorption performance of the sheath can be improved by further magnetization, and the sheath has flame retardant properties;

[0270] The wire extrusion die of the present application can avoid the eccentricity of the wire when it is drawn out through the outlet port, which increases the drawing resistance and reduces the drawing speed, by improving the smoothness of the inner wall of the flow channel, shortening the flow channel and providing a silicone rubber positioning ring, so that the wire can be smoothly drawn out after being oriented in the magnetic field;

[0271] The wire extrusion die of the present application, through the cooperation of the silicone tube, silicone pressure cap and cover, effectively prevents the coating layer raw material from flowing back into the core mold during the extrusion process, causing blockage of the flow channel and increasing the resistance to wire extraction, so that the wire can be smoothly extracted from the wire extrusion die.

[0272] The wire of the present application is made by the wire extrusion die mentioned above, so the sheath of the wire has magnetic adsorption capability, and the magnetic adsorption performance can be improved by further magnetization, and it also has flame retardant properties.

[0273] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A wire extrusion die, wherein the sheath of the wire has a magnetic adsorption function, characterized in that: The wire extrusion die comprises: An extruder head device comprises a core mold and a shell, wherein the shell has an insertion port and an extrusion port, the core mold is inserted into the shell from the insertion port, a gap is provided between the inner wall surface of the shell adjacent to the extrusion port and the core mold to form a glue injection cavity, the core mold is provided with a through hole for a bare wire to pass through, the through hole is connected to the glue injection cavity, and the shell is provided with a glue injection flow channel connected to the glue injection cavity; A magnetic field orientation device, comprising a detachable magnetic field generating component connected to the shell, the magnetic field generating component is configured to perform magnetic field orientation on the sheath of the wire, the magnetic field generating component is provided with a channel for the wire to pass through, the channel is coaxially connected to the through hole through the extrusion port.

2. The wire extrusion die according to claim 1, characterized in that: The magnetic field generating assembly comprises: A first magnetic conductor having a first butt joint surface, wherein a first groove is provided on the first butt joint surface; A second magnetic conductor having a second docking surface, the second docking surface being configured to be connected to the first docking surface, a second groove being provided on the second docking surface, and when the second docking surface is connected to the first docking surface, the first groove and the second groove are docked to form the channel; A first permanent magnet, which is sandwiched between the first magnetic conductor and the second magnetic conductor; The second permanent magnet is sandwiched between the first magnetic conductor and the second magnetic conductor, and the second permanent magnet and the first permanent magnet are respectively located on two opposite sides of the channel.

3. The wire extrusion die according to claim 2, characterized in that: The magnetic field orientation device further includes a heating component, and the heating component includes: A first heating plate connected to the outer surface of the first magnetic conductor; A second heating plate connected to the outer surface of the second magnetic conductor; A controller is electrically connected to the first heating plate and the second heating plate, and the controller is configured to adjust the temperature of the first heating plate and the second heating plate.

4. The wire extrusion die according to claim 3, characterized in that: The magnetic field generating assembly also includes: A first heat-insulating layer, which covers an outer surface of the first permanent magnet that is not in contact with the first magnetic conductor and the second magnetic conductor; The second heat-insulating layer covers the outer surface of the second permanent magnet which is not in contact with the first magnetic conductor and the second magnetic conductor.

5. The wire extrusion die according to claim 3, characterized in that: The magnetic field generating assembly also includes: a first half mold disposed in the first groove; The second half mold is arranged in the second groove. When the first groove and the second groove are connected, the first half mold and the second half mold are connected to form a magnetic field core mold. The magnetic field core mold has a through hole allowing the wire to pass through.

6. The wire extrusion die according to claim 5, characterized in that: The magnetic field generating assembly also includes a third heat insulation layer covering the outside of the magnetic field core mold.

7. The wire extrusion die according to claim 1, characterized in that: The magnetic field generating assembly comprises: A plurality of fan-shaped third permanent magnets, wherein the plurality of third permanent magnets are enclosed to form a ring and form a ring-shaped Halbach array structure, and the inner hole of the ring-shaped Halbach array structure forms the channel; A metal fastening ring, which is sleeved on the outside of the plurality of third permanent magnets; The heating ring is sleeved on the outside of the metal fastening ring.

8. The wire extrusion die according to claim 7, characterized in that: The magnetic field generating assembly further comprises a magnetic field core mold, which is embedded in the inner hole of the annular Halbach array structure, and the magnetic field core mold is provided with a through hole allowing the wire to pass through.

9. The wire extrusion die according to claim 1, characterized in that: The magnetic field generating assembly comprises: An electromagnet, wherein the N pole and the S pole of the electromagnet are arranged opposite to each other, and there is a gap between the N pole and the S pole of the electromagnet; The magnetic field core mold is clamped in the gap, and the channel is arranged on the magnetic field core mold.

10. The wire extrusion die according to any one of claims 1 to 8, characterized in that: The magnetic field orientation device also includes a connecting plate connected to the first end of the magnetic field generating assembly, and the magnetic field generating assembly is connected to the housing through the connecting plate.

11. The wire extrusion die according to claim 10, characterized in that: The magnetic field orientation device further comprises a gland connected to the second end of the magnetic field generating assembly, wherein the gland is provided with an outlet port, and the outlet port is coaxially connected to the channel.

12. The wire extrusion die according to claim 11, characterized in that: A silicon rubber positioning ring is sandwiched between the gland and the magnetic field generating assembly, and the silicon rubber positioning ring is coaxially connected with the channel and the outlet port.

13. The wire extrusion die according to any one of claims 2 to 9, characterized in that: The length of the channel is less than or equal to 8 cm.

14. The wire extrusion die according to claim 1, characterized in that: A silicone tube is arranged in the core mold, the outer wall surface of the silicone tube is closely fitted to the inner wall surface of the through hole, and the inner hole of the silicone tube allows the bare wire to pass through.

15. The wire extrusion die according to claim 14, characterized in that: One end of the core mold adjacent to the insertion port is the inlet end, and the inlet end is located outside the shell. A cover cap is connected to the inlet end, and a first jack is provided on the cover cap. A silicone pressure cap is sandwiched between the cover cap and the inlet end, and the silicone pressure cap abuts against the silicone tube. A second jack is provided on the silicone pressure cap, and the first jack, the second jack and the inner hole of the silicone tube are coaxially connected in sequence.

16. The wire extrusion die according to claim 1, characterized in that: The housing comprises: A core mold seat having a cylindrical receiving cavity, the insertion port being arranged at a first end of the core mold seat, and the injection flow channel being arranged on the core mold seat; The mold sleeve seat has a conical receiving cavity. The first end of the mold sleeve seat can be detachably connected to the second end of the core mold seat. The large diameter end of the cylindrical receiving cavity is connected to the cylindrical receiving cavity. The extrusion port is arranged at the second end of the mold sleeve seat.

17. The wire extrusion die according to claim 16, characterized in that: The shell also includes a glue injection seat, which is connected to the core mold seat. The glue injection seat is provided with a glue injection through hole connected to the glue injection flow channel.

18. A wire material, characterized in that: The wire is made by using the wire extrusion die according to any one of claims 1 to 17.

19. The wire according to claim 18, characterized in that The sheath of the wire is made of anisotropic magnetic material and thermoplastic elastomer.

20. The wire according to claim 18, characterized in that The sheath of the wire is made of anisotropic magnetic material, thermoplastic elastomer and flame retardant material.

21. The wire according to claim 19 or 20, characterized in that The outside of the sheath is covered with a braided layer or a silicone layer.

22. The wire according to claim 19 or 20, characterized in that The wire is a data wire, a power wire or a signal wire.

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