WO2012132589A1 - Cable using flat-shaped powder magnetic material as sheathing thereof, and method of manufacturing same - Google Patents

Cable using flat-shaped powder magnetic material as sheathing thereof, and method of manufacturing same Download PDF

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Publication number
WO2012132589A1
WO2012132589A1 PCT/JP2012/053422 JP2012053422W WO2012132589A1 WO 2012132589 A1 WO2012132589 A1 WO 2012132589A1 JP 2012053422 W JP2012053422 W JP 2012053422W WO 2012132589 A1 WO2012132589 A1 WO 2012132589A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
core wire
covering portion
resin material
cable
Prior art date
Application number
PCT/JP2012/053422
Other languages
French (fr)
Japanese (ja)
Inventor
正夫 宮浦
石垣　功
Original Assignee
アルプス電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Publication of WO2012132589A1 publication Critical patent/WO2012132589A1/en

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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
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • 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
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1058—Screens specially adapted for reducing interference from external sources using a coating, e.g. a loaded polymer, ink or print
    • H01B11/1083—Screens specially adapted for reducing interference from external sources using a coating, e.g. a loaded polymer, ink or print the coating containing magnetic material

Definitions

  • the present invention relates to a cable using a magnetic material for coating, and particularly to a cable having a thin wire diameter that can be easily covered using a flat magnetic powder as a magnetic material used for coating, and a method for manufacturing the same.
  • EMC Electro-Magnetic Compatibility
  • a cable described in Patent Document 1 below is known as a cable whose outer periphery is coated with a magnetic material.
  • FIG. 11 is an exploded perspective view showing the structure of a cable whose outer periphery is covered with a magnetic material described in Patent Document 1.
  • FIG. 11 is an exploded perspective view showing the structure of a cable whose outer periphery is covered with a magnetic material described in Patent Document 1.
  • a shield layer S is provided outside the signal line W, a magnetic layer M is provided outside the shield layer S, and the outer layer O is covered. Cover.
  • the magnetic layer M has a two-layer structure in which a ferrite resin layer Fe is provided on one side of the metal film SF.
  • the cable whose outer periphery is covered with the magnetic material described in Patent Document 1 is covered with the magnetic material layer M on the outside of the signal line W, so that noise is suppressed and exhibits an effect on EMC and crosstalk.
  • the cable whose outer periphery is coated with the magnetic body has a structure in which the shield layer S is provided outside the signal line W, the magnetic layer M is provided outside the shield layer S, and the outer cover layer O covers the cable. Therefore, there are many steps for covering, and there is a problem that the wire diameter of the cable Ca after covering becomes thick.
  • the present invention solves the above-mentioned problems and provides a cable with a thin wire diameter that can be easily covered with a magnetic body and uses a flat magnetic powder for the magnetic body covering the outer periphery.
  • the cable according to claim 1 is a cable in which a magnetic body is disposed on an outer peripheral portion of a core wire through which an electrical signal passes, and the core wire is covered with an insulator covering portion formed of an insulator,
  • the portion is formed in a cylindrical shape, and has a spiral groove portion on the outer periphery along the length direction of the core wire, and a magnetic body covering portion formed of an insulator containing flat magnetic powder in the groove portion. It has the characteristic that it is provided integrally with the said insulator coating
  • the cable according to claim 2 is characterized in that the flat magnetic powder contained in the magnetic coating portion is oriented so as to form a layer concentrically with respect to the center of the core wire.
  • the cable according to claim 3 is characterized in that the magnetic susceptibility magnetic loss of the flat magnetic powder is less than 15 in the frequency band of 20 Mhz to 1 Ghz.
  • the cable according to claim 4 is characterized in that the thickness of the magnetic body covering portion is 1 mm or less.
  • the cable manufacturing method wherein the core wire is covered with a synthetic resin material, and the core wire covered with the synthetic resin material is covered with a magnetic material.
  • the extruder of 1 forms the insulator coating
  • the magnetic resin material is injected into the concave groove portion of the core wire covered with the covering portion, and the magnetic body covering portion is formed integrally with the insulator covering portion.
  • the first extruder includes a first melting furnace capable of heating and melting the synthetic resin material and inserting the core wire
  • the first melting furnace has a first extrusion hole through which the core wire can be inserted, and the core wire is inserted into the first melting furnace containing the heat-melted synthetic resin material,
  • the first extruder forms the insulator covering portion around the core wire, and the second extruder heats and melts the magnetic resin material.
  • a second melting furnace capable of inserting the core wire covered by the insulator covering portion, the second melting furnace being able to insert the core wire covered by the insulator covering portion.
  • the magnetic resin material is heated and melted.
  • the second extruder By inserting the core wire covered with the insulator covering portion into the second melting furnace wrapped and taking out from the second extrusion hole, the second extruder is attached to the insulator covering portion.
  • the magnetic resin material is injected into the recessed groove portion of the coated core wire, and the magnetic body covering portion is formed integrally with the insulator covering portion.
  • the first extrusion hole includes a concave groove processing mechanism that processes the concave groove portion into a spiral concave groove
  • the concave groove processing mechanism includes the core wire.
  • the core covered with the synthetic resin material is taken out from the first extruder to form the insulator covering portion having the spiral groove.
  • the cable manufacturing method wherein in the second melting furnace, the magnetic resin material attached around the core wire covered with the insulator covering portion is injected into the concave groove portion. Except for the magnetic resin material, the second extrusion hole end portion of the inner wall of the second melting furnace is removed, and the magnetic body contained in the magnetic resin material is located with respect to the center of the core wire. It is characterized by being oriented so as to form layers concentrically.
  • the cable manufacturing method according to claim 9 is characterized in that the depth of the concave groove portion is 1 mm or less.
  • the magnetic powders are overlapped with each other and the gaps are formed as compared with the case where the granular magnetic powder is used by orienting the flat-shaped flat magnetic powder to form a layer. There is an effect that it becomes smaller and noise can be suppressed more efficiently.
  • the flat magnetic powder is formed concentrically with respect to the center of the core wire. The effect that it can orientate so that it may comprise is produced.
  • the core wire is covered with the insulator covering portion, and the magnetic resin material is injected into the spiral groove portion provided in the insulator covering portion so as to be integrally molded.
  • the outer periphery of the core wire is covered with a synthetic resin material and a magnetic resin material by molding, thereby making it easier to manufacture than a conventional method of winding a magnetic sheet around a core wire.
  • the cable can be realized by this method.
  • the insulator covering portion is obtained by taking out the core wire covered with the molten synthetic resin material from the first extruder through the nozzle portion in a state where the protrusion is rotating. There is an effect that it is possible to easily process the spiral groove portion on the outer periphery.
  • the eighth aspect of the present invention it is possible to remove the excess magnetic resin material from the outer peripheral surface of the insulator covering portion and form the magnetic body covering portion in the recessed groove portion by an easy method using the doctor blade method. There is an effect that it is possible.
  • the flat magnetic powder is placed in the center of the core wire.
  • the film can be oriented so as to form a concentric layer.
  • FIG. 1 is a diagram illustrating an appearance of a cable according to the present embodiment.
  • FIG. 2 is a side view showing the cable of the present embodiment.
  • the magnetic body covering portion 30 is indicated by a virtual line.
  • 3 is a view showing the orientation state of the flat magnetic powder 30a
  • FIG. 3 (a) is a cross-sectional view showing a cross section 3-3 of FIG. 2
  • FIG. 3 (b) is a cross-sectional view of FIG. 3 (a). It is an enlarged view of the A section.
  • FIG. 4 is an example of a cross-sectional SEM photograph of the magnetic body covering portion 30.
  • FIG. 5 is a diagram showing the magnetic loss characteristics of the flat magnetic powder 30a.
  • the cable 1 of the present embodiment includes a core wire 10 through which an electrical signal passes, an insulator covering portion 20 that is formed of an insulator and covers the core wire 10, and an insulator covering portion 20. And a magnetic body covering portion 30 disposed in a spiral shape along the outer periphery.
  • the core wire 10 is formed of a conductive wire.
  • the insulator covering portion 20 is formed in a cylindrical shape by a synthetic resin material 40 (see FIG. 7B) that covers the periphery of the core wire 10 and has insulating properties and flexibility. Moreover, it has the spiral groove part 20a on the outer periphery along the length direction of the core wire 10.
  • the magnetic body covering portion 30 is formed of a magnetic resin material 50 (see FIG. 8B) that is an insulator containing the flat magnetic powder 30a, and is provided integrally in the recessed groove portion 20a of the insulating body covering portion 20. At the same time, it is provided flush with the outer peripheral surface of the insulator covering portion 20.
  • the magnetic resin material 50 forming the magnetic body covering portion 30 contains the flat magnetic powder 30a in the insulator 30b.
  • the flat magnetic powder 30a is oriented so as to be concentrically layered with respect to the center of the core wire 10.
  • the flat magnetic powder 30a will be briefly described. Although the detailed description is omitted, the flat magnetic powder 30a is obtained by classifying granular magnetic powder prepared by a water atomizing method using a material containing iron as a main component, for example, permalloy (Fe—Ni alloy). And processed into a flat magnetic powder using an apparatus such as a planetary stirring ball mill.
  • a material containing iron as a main component for example, permalloy (Fe—Ni alloy).
  • an annealing treatment may be performed to relieve the internal stress as necessary.
  • the magnetic loss magnetic loss ⁇ ′′ of the flat magnetic powder 30a is 15 or more in the frequency band of 20 Mhz to 1 Ghz.
  • cover part 30 is formed in 1 mm or less.
  • FIG. 6 is a diagram illustrating a configuration of a manufacturing apparatus 100 that manufactures the cable 1.
  • FIG. 7 is a view showing the structure of the first extruder 110
  • FIG. 7 (a) is an external view of the first extruder 110
  • FIG. 7 (b) is a cross section 7B of FIG. 7 (a).
  • FIG. 7C is a cross-sectional view showing a cross section 7C-7C of FIG. 7A.
  • FIG. 8 is a view showing the structure of the second extruder 120
  • FIG. 8A is an external view of the second extruder 120
  • FIG. 8B is a cross section 8B of FIG. 8A
  • FIG. 8C is a cross-sectional view showing ⁇ 8B
  • FIG. 8C is an enlarged view showing a portion E of FIG. 8B.
  • the manufacturing apparatus 100 that manufactures the cable 1 includes a first extruder 110 that can heat and melt and extrude the synthetic resin material 40 that forms the insulator covering portion 20, and a magnetic body. And a second extruder 120 capable of heating and melting the magnetic resin material 50 forming the covering portion 30 and extruding the same.
  • the flow of manufacturing the cable 1 is performed by installing the core wire 10 in the first extruder 110 and processing it, so that the insulator covering portion 20 is formed around the core wire 10. .
  • the core wire 10 covered with the insulator covering portion 20 is installed and processed in the second extruder 120, so that the magnetic covering portion 30 is formed integrally with the insulator covering portion 20 in the recessed groove portion 20a.
  • the cable 1 is obtained.
  • FIG. 6 the figure of the manufacturing apparatus 100 which manufactures the cable 1 shown in FIG. 6 is a conceptual diagram, and the shape of the manufacturing apparatus 100 etc. are not necessarily shown in a figure.
  • the first extruder 110 forms and coats the insulator covering portion 20 in a cylindrical shape around the core wire 10 with a synthetic resin material, and forms a spiral groove 20 a on the outer periphery of the insulator covering portion 20. Can do.
  • the first extruder 110 includes a first melting furnace 111 that can heat and melt the synthetic resin material 40 and can insert the core wire 10.
  • 111 has the 1st extrusion hole 111a which can insert the core wire 10.
  • the first extruder 110 is insulated around the core wire 10 by inserting the core wire 10 into the first melting furnace 111 containing the heat-melted synthetic resin material 40 and taking it out from the first extrusion hole 111a.
  • the body covering portion 20 can be formed.
  • the first extrusion hole 111 a includes a groove processing mechanism 112 that processes the groove 20 a on the outer periphery of the insulator covering portion 20.
  • the groove processing mechanism 112 includes a nozzle portion 112a through which the core wire 10 can be inserted.
  • the nozzle portion 112a has a pleated protrusion 112b on the inner peripheral surface, and an arrow D shown in FIG. It is provided to be rotatable in the direction.
  • the concave groove machining mechanism 112 rotates in a constant direction at a constant speed, and accordingly, the projection 112b provided on the inner peripheral surface of the nozzle portion 112a also rotates.
  • the insulator covering portion 20 having a spiral groove portion 20a around the core wire 10 covered with the synthetic resin material 40 is taken out from the first extruder 110 through the nozzle portion 112a in a state where the protrusion 112b is rotated. Is formed. At this time, the depth of the groove 20a is 1 mm or less.
  • the core wire 10 covered with the insulator covering portion 20 is formed by cooling the insulator covering portion 20 thus formed.
  • the second extruder 120 injects the magnetic resin material 50 into the groove 20 a of the core wire 10 covered with the insulator covering portion 20, and forms the magnetic body covering portion 30 integrally with the insulator covering portion 20.
  • the second extruder 120 can heat and melt the magnetic resin material 50 and can insert the core wire 10 covered with the insulator covering portion 20.
  • a furnace 121 is provided.
  • the second melting furnace 121 has a second extrusion hole 121a into which the core wire 10 covered by the insulator covering portion 20 can be inserted, and includes a magnetic resin material 50 that is heated and melted.
  • the core wire 10 covered with the insulator covering portion 20 is inserted into the core 121 and taken out from the second push-out hole 121a, so that the second extruder 120 has the core wire 10 covered with the insulator covering portion 20
  • the magnetic resin material 50 is injected into the recessed groove portion 20 a and the magnetic body covering portion 30 is formed integrally with the insulator covering portion 20.
  • the magnetic resin material 50 adhered around the core wire 10 covered with the insulator covering portion 20 is the same as the first, except for the magnetic resin material 50 injected into the concave groove portion 20a. 2 is removed by a wiping portion 121b (second extrusion hole end portion) provided on the inner wall of the second melting furnace 121.
  • the wiping portion 121b can remove the excess magnetic resin material 50.
  • the wiping portion 121b can remove the excess magnetic resin material 50 by forming the same structure as the doctor blade method by setting the interval between the wiping portion 121b and the insulator covering portion 20 to a predetermined interval. It is because it is doing.
  • FIG. 9 is a diagram showing an example of an apparatus using a doctor blade method.
  • the doctor blade method is one of the methods used to form thin films and films.
  • the apparatus using the doctor blade method is a blade BL that can adjust the thickness of a thin film or the like by moving up and down, and a container that holds slurry SL that is a material such as a thin film together with the blade BL.
  • the main body BE and the base material CT which conveys the slurry SL are provided.
  • the slurry SL can be stored in the container part PT formed by the main body BE and the blade BL.
  • a base material CT is disposed at the bottom of the container part PT, and the base material CT moves at a constant speed in the direction of arrow F shown in FIG.
  • a discharge hole GE having a predetermined gap is provided between the base CT and the blade BL and has the same width as the base CT, and the base CT moves at a constant speed in the direction of arrow F.
  • the slurry SL together with the base material CT passes through the discharge hole GA and moves to the outside of the container part PT.
  • the slurry SL having a certain thickness is disposed on the base material CT by passing through the discharge hole GA and moving to the outside of the container part PT. Is formed.
  • the second melting furnace 121 serves as the container part PT
  • the wiping part 121b serves as the blade BL
  • the core wire 10 covered by the insulator covering part 20 is the base material CT.
  • the distance between the wiping portion 121b and the insulator covering portion 20 is set to a predetermined interval so that the doctor blade method forms a slurry having a uniform film thickness by adjusting the position of the blade BL. It becomes possible to remove the excess magnetic resin material 50.
  • the wiping portion 121b leveles the magnetic resin material 50 injected into the concave groove portion 20a, so that the magnetic resin
  • the flat magnetic powder 30 a included in the material 50 is oriented so as to be concentrically layered with respect to the center of the core wire 10.
  • the flat magnetic powder 30a contained in the magnetic resin material 50 is oriented so as to form a layer concentrically with respect to the center of the core wire 10 while managing the thickness of the magnetic body covering portion 30 to 1 mm or less. This is because the depth of the concave groove 20a is controlled to 1 mm or less, and the excess magnetic resin material 50 is removed by a method similar to the doctor blade method.
  • FIG. 10 is an SEM photograph in which the magnetic resin material 50 is formed in a sheet shape with an apparatus utilizing the doctor blade method, and a cross section thereof is photographed.
  • FIG. 10A is an SEM photograph showing a cross section when the thickness of the sheet made of the magnetic resin material 50 is thicker than 1 mm
  • FIG. 10B shows the thickness of the sheet made of the magnetic resin material 50. It is a SEM photograph which photoed the section at the time of making it 1 mm or less.
  • the orientation of the flat magnetic powder 30a is likely to be disturbed as shown in part G of FIG.
  • the thickness of the sheet is 1 mm or less, as shown in FIG. 10B, the orientation of the flat magnetic powder 30a is not disturbed.
  • the thickness of the magnetic body covering portion 30 1 mm or less by making the thickness of the magnetic body covering portion 30 1 mm or less, the orientation of the flat magnetic powder 30 a in the magnetic resin material 50 is not disturbed, and the flat magnetic powder 30 a is in the center of the core wire 10.
  • the layers are oriented in a concentric manner.
  • the cable 1 covered with the insulator covering portion 20 and the magnetic covering portion 30 is formed by cooling the magnetic covering portion 30 thus formed.
  • the core wire 10 is covered with the insulator covering portion 20 formed of an insulator, and the flat magnetic powder 30a is contained in the recessed groove portion 20a formed on the outer periphery of the insulator covering portion 20.
  • the magnetic body covering portion 30 is provided integrally with the insulator covering portion 20.
  • the periphery of the core wire 10 is covered with the insulator covering portion 20 having the recessed groove portion 20a, and the magnetic body covering portion 30 containing the flat magnetic powder 30a is disposed in the recessed groove portion 20a.
  • the effect of suppressing noise equal to or higher than that it is possible to form a cable with a thinner wire diameter.
  • the flat magnetic powder 30 a contained in the magnetic body covering portion 30 is oriented so as to be concentrically layered with respect to the center of the core wire 10.
  • the magnetic susceptibility magnetic loss ⁇ ′′ of the flat magnetic powder 30a is 15 or more in the frequency band of 20 Mhz to 1 Ghz.
  • the magnetic susceptibility magnetic loss ⁇ ′′ which is a value indicating the characteristic of absorbing electromagnetic waves, is a value of 15 or more in a wide frequency range of 20 Mhz to 1 Ghz, and therefore a stable noise suppression effect in the high frequency range. The effect that can be exhibited.
  • the thickness of the magnetic body covering portion 30 is formed to be 1 mm or less.
  • the flat magnetic powder 30a is formed concentrically with respect to the center of the core wire 10. Can be oriented.
  • the synthetic resin material 40 and the magnetic resin material 50 are made of flexible materials.
  • the cable 1 has flexibility, and can be used for more various applications as compared with the case where the cable 1 does not have flexibility.
  • the manufacturing method of the cable 1 of this embodiment it is possible to heat and melt and extrude the magnetic resin material 50 and the first extruder 110 that can heat and melt the synthetic resin material 40.
  • Second extruder 120 The first extruder 110 covers the periphery of the core wire 10 with a synthetic resin material 40 in a cylindrical shape, and forms the insulator covering portion 20 having a spiral groove 20a on the outer periphery.
  • the second extruder 120 In the manufacturing method, the magnetic resin material 50 is injected into the groove 20 a of the core wire 10 covered with the insulator covering portion 20, and the magnetic covering portion 30 is molded integrally with the insulator covering portion 20.
  • the core wire 10 is covered with the insulator covering portion 20, and the magnetic resin material 50 is injected into the spiral concave groove portion 20a provided in the insulator covering portion 20 so as to be integrally molded.
  • the magnetic resin material 50 is injected into the spiral concave groove portion 20a provided in the insulator covering portion 20 so as to be integrally molded.
  • the first extruder 110 includes the first melting furnace 111 that can heat and melt the synthetic resin material 40 and can insert the core wire 10.
  • the first melting furnace 111 has a first extrusion hole 111a through which the core wire 10 can be inserted, and the core wire 10 is inserted into the first melting furnace 111 containing the heat-melted synthetic resin material 40.
  • the 1st extruder 110 shape
  • the second extruder 120 includes a second melting furnace 121 that can heat and melt the magnetic resin material 50 and can insert the core wire 10 covered by the insulator covering portion 20.
  • the second melting furnace 121 has a second extrusion hole 121a into which the core wire 10 covered by the insulator covering portion 20 can be inserted, and includes a magnetic resin material 50 that is heated and melted.
  • the second extruder 120 has a concave portion of the core wire 10 covered with the insulator cover portion 20.
  • the magnetic resin material 50 is injected into the groove portion 20 a and the magnetic body covering portion 30 is formed integrally with the insulator covering portion 20.
  • the outer periphery of the core wire 10 is covered with a synthetic resin material and a magnetic resin material by molding, thereby realizing a cable with an easier manufacturing method compared to the conventional method of winding a magnetic sheet around a core wire. There is an effect that it is possible.
  • the 1st extrusion hole 111a is provided with the ditch
  • 10 is provided with a nozzle portion 112a through which the nozzle portion 112a can be inserted.
  • the nozzle portion 112a has a ridge-like protrusion 112b on the inner peripheral surface, is rotatably provided around the core wire 10, and is in a state of rotating the protrusion 112b. It was set as the manufacturing method which forms the insulator coating
  • the core wire 10 covered with the molten synthetic resin material 40 is taken out from the first extruder 110 through the nozzle portion 112a in a state in which the protrusion 112b is rotated, so that the outer periphery of the insulator covering portion 20 is spiraled.
  • the concave groove portion 20a can be easily processed.
  • coated part 20 in the 2nd melting furnace 121 is inject
  • the flat magnetic powder 30a contained in the magnetic resin material 50 is concentrically formed with respect to the center of the core wire 10 while being removed by the wiping portion 121b of the second melting furnace 121 except for the magnetic resin material 50 that has been removed.
  • coated part 30 can be formed in the recessed groove part 20a. There is an effect.
  • the depth of the groove 20a is formed to 1 mm or less.
  • the flat magnetic powder 30a is made to be centered on the center of the core wire 10.
  • the cable and the manufacturing method thereof according to the embodiment of the present invention have been specifically described.
  • the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. It is possible to implement.
  • the present invention can be modified as follows, and these embodiments also belong to the technical scope of the present invention.
  • the magnetic body covering portion 30 is disposed in a spiral shape, but may be disposed in a lattice shape.
  • the synthetic resin material 40 that forms the insulator covering portion 20 and the magnetic resin material 50 that forms the magnetic covering portion 30 are flexible materials, but are not necessarily flexible. It does not have to have sex.
  • the water atomization method is used as a method for producing the flat magnetic powder 30a, but a gas atomization method, a liquid quenching method, or the like may be used.
  • the wiping portion 121b is a terminal portion of the second extrusion hole 121a and the cross-sectional shape is shown as a right angle, but the excess magnetic resin material 50 is more efficiently removed.
  • the angle of the cross-sectional shape may be changed, or a squeegee may be formed.
  • the number of the protrusions 112b is one, but the number is increased within a range that does not impair the noise suppression effect, and the magnetic body covering portion 30 is formed in a double spiral or triple spiral. It may be a shape. Thereby, the noise suppression effect increases more because the area of the magnetic body coating
  • the direction of taking out the core wire 10 covered with the insulator covering portion 20 from the first extruder 110 and the direction of taking out the cable 1 from the second extruder 120 are set downward. However, it may be taken out from the side or from above.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Soft Magnetic Materials (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)

Abstract

[Problem] To provide a thin wire-diameter cable that can have the outer circumference thereof sheathed easily with a magnetic material, and wherein flat-shaped magnetic powder is used as the magnetic material for sheathing the outer circumference of the cable. [Solution] A cable (1) has an outer circumference section of a core (10) thereof sheathed with an insulator sheathing section (20) that is formed of an insulator, has a magnetic-material sheathing section (30) comprising flat-shaped powder magnetic powder (30a) formed spirally around the outer circumference section of the insulator sheathing section (20), integrated with the insulator sheathing section, and has the flat-shaped powder magnetic powder (30a) oriented in concentric-circle state with the core (10) as the center thereof. A method of manufacturing the cable is configured so as to be provided with: a first extruder that heats and melts synthetic resin material (40), and forms the insulator sheathing section (20) around the outer circumference of the core (10); and a second extruder that heats and melts magnetic resin material (50), and forms the magnetic-material sheathing section (30) around the outer circumference of the insulator sheathing section (20).

Description

被覆に扁平粉末磁性体を使用したケーブルおよびその製造方法Cable using flat powder magnetic material for coating and manufacturing method thereof
　本発明は、被覆に磁性体を使用したケーブルに関し、特に、被覆に用いる磁性体として扁平状磁性粉末を使用し容易に被覆できるとともに線径が細いケーブルおよびその製造方法に関するものである。 The present invention relates to a cable using a magnetic material for coating, and particularly to a cable having a thin wire diameter that can be easily covered using a flat magnetic powder as a magnetic material used for coating, and a method for manufacturing the same.
　昨今、信号を送信・受信する速度が高速化するに従い、ケーブルから出入りする電磁波に対するＥＭＣ（Ｅｌｅｃｔｒｏ－Ｍａｇｎｅｔｉｃ　Ｃｏｍｐａｔｉｂｉｌｉｔｙ、電磁両立性）や、信号間のクロストークの問題が取り上げられている。 Recently, as the speed at which signals are transmitted and received increases, EMC (Electro-Magnetic Compatibility) for electromagnetic waves entering and leaving the cable and crosstalk problems between signals have been taken up.
　このようなＥＭＣやクロストークなどのノイズに関する問題を解決する為に、ノイズ抑制効果のある磁性体で外周を被覆したケーブルが求められている。 In order to solve such noise-related problems such as EMC and crosstalk, a cable whose outer periphery is coated with a magnetic material having a noise suppressing effect is demanded.
　磁性体で外周を被覆されたケーブルとしては、下記の特許文献１に記載のケーブルが知られている。 A cable described in Patent Document 1 below is known as a cable whose outer periphery is coated with a magnetic material.
　以下、図１１を用いて、特許文献１に記載の磁性体で外周を被覆されたケーブルについて説明する。図１１は、特許文献１に記載の磁性体で外周を被覆されたケーブルの構造を示す分解斜視図である。 Hereinafter, a cable whose outer periphery is covered with a magnetic material described in Patent Document 1 will be described with reference to FIG. FIG. 11 is an exploded perspective view showing the structure of a cable whose outer periphery is covered with a magnetic material described in Patent Document 1. FIG.
　特許文献１に記載の磁性体で外周を被覆されたケーブルＣａは、信号線Ｗの外側にシールド層Ｓを設け、シールド層Ｓの外側に磁性体層Ｍを設けて外被層Ｏにて被蔽する。磁性体層Ｍは、金属フィルムＳＦの片面にフェライト樹脂層Ｆｅを設けて２層構造となっている。 In the cable Ca whose outer periphery is covered with a magnetic material described in Patent Document 1, a shield layer S is provided outside the signal line W, a magnetic layer M is provided outside the shield layer S, and the outer layer O is covered. Cover. The magnetic layer M has a two-layer structure in which a ferrite resin layer Fe is provided on one side of the metal film SF.
特開２００４－１１１３１７号公報JP 2004-111317 A
　特許文献１に記載の磁性体で外周を被覆されたケーブルは、信号線Ｗの外側を磁性体層Ｍで被蔽することでノイズが抑制され、ＥＭＣやクロストークに対して効果を発揮する。 The cable whose outer periphery is covered with the magnetic material described in Patent Document 1 is covered with the magnetic material layer M on the outside of the signal line W, so that noise is suppressed and exhibits an effect on EMC and crosstalk.
　しかしながら、上記磁性体で外周を被覆されたケーブルは、信号線Ｗの外側にシールド層Ｓを設け、シールド層Ｓの外側に磁性体層Ｍを設けて外被層Ｏにて被蔽する構造としているため、被蔽するための工程が多く、被蔽後のケーブルＣａの線径が太くなるという問題があった。 However, the cable whose outer periphery is coated with the magnetic body has a structure in which the shield layer S is provided outside the signal line W, the magnetic layer M is provided outside the shield layer S, and the outer cover layer O covers the cable. Therefore, there are many steps for covering, and there is a problem that the wire diameter of the cable Ca after covering becomes thick.
　本発明は、上述した課題を解決して、外周を磁性体で容易に被覆でき、外周を被覆する磁性体に扁平状磁性粉末を使用した線径の細いケーブルを提供するものである。 The present invention solves the above-mentioned problems and provides a cable with a thin wire diameter that can be easily covered with a magnetic body and uses a flat magnetic powder for the magnetic body covering the outer periphery.
　請求項１に記載のケーブルは、電気的信号が通る芯線の外周部に磁性体が配されたケーブルにおいて、前記芯線は、絶縁体で形成された絶縁体被覆部に被覆され、前記絶縁体被覆部は円筒状に形成され前記芯線の長さ方向に沿って外周に螺旋状の凹溝部を有し、前記凹溝部内に扁平状磁性粉末を含有する絶縁体で形成された磁性体被覆部が前記絶縁体被覆部と一体に設けられている、という特徴を有する。 The cable according to claim 1 is a cable in which a magnetic body is disposed on an outer peripheral portion of a core wire through which an electrical signal passes, and the core wire is covered with an insulator covering portion formed of an insulator, The portion is formed in a cylindrical shape, and has a spiral groove portion on the outer periphery along the length direction of the core wire, and a magnetic body covering portion formed of an insulator containing flat magnetic powder in the groove portion. It has the characteristic that it is provided integrally with the said insulator coating | coated part.
　請求項２に記載のケーブルは、前記磁性体被覆部に含有される前記扁平状磁性粉末は、前記芯線の中心に対して同心円状に層を成すように配向している、という特徴を有する。 The cable according to claim 2 is characterized in that the flat magnetic powder contained in the magnetic coating portion is oriented so as to form a layer concentrically with respect to the center of the core wire.
　請求項３に記載のケーブルは、前記扁平状磁性粉末の磁性率磁気損失は、周波数帯が２０Ｍｈｚから１Ｇｈｚの範囲において、１５以上で変動が小さい、という特徴を有する。 The cable according to claim 3 is characterized in that the magnetic susceptibility magnetic loss of the flat magnetic powder is less than 15 in the frequency band of 20 Mhz to 1 Ghz.
　請求項４に記載のケーブルは、前記磁性体被覆部の厚さを１ｍｍ以下に形成する、という特徴を有する。 The cable according to claim 4 is characterized in that the thickness of the magnetic body covering portion is 1 mm or less.
　請求項５に記載のケーブルの製造方法は、芯線の周囲を合成樹脂材で被覆し、前記合成樹脂材で被覆された前記芯線の周囲を磁性体で被覆するケーブルの製造方法において、前記合成樹脂材を加熱溶融して押出すことが可能な第１の押出機と、前記磁性体を含有する磁性樹脂材を加熱溶融して押出すことが可能な第２の押出機とを備え、前記第１の押出機は、前記芯線の周囲を前記合成樹脂材で円筒状に被覆するとともに外周に螺旋状の凹溝部を有する絶縁体被覆部を成形し、前記第２の押出機は、前記絶縁体被覆部で被覆された前記芯線の前記凹溝部に前記磁性樹脂材を注入し前記絶縁体被覆部と一体に磁性体被覆部を成形する、という特徴を有する。 6. The cable manufacturing method according to claim 5, wherein the core wire is covered with a synthetic resin material, and the core wire covered with the synthetic resin material is covered with a magnetic material. A first extruder capable of heating and melting and extruding the material, and a second extruder capable of heating and melting and extruding the magnetic resin material containing the magnetic material, The extruder of 1 forms the insulator coating | coated part which coat | covers the circumference | surroundings of the said core wire with the said synthetic resin material, and has a spiral groove part on the outer periphery, and said 2nd extruder is the said insulator The magnetic resin material is injected into the concave groove portion of the core wire covered with the covering portion, and the magnetic body covering portion is formed integrally with the insulator covering portion.
　請求項６に記載のケーブルの製造方法は、前記第１の押出機は、前記合成樹脂材を加熱し溶融することが可能であるとともに前記芯線を挿入可能な第１の溶融炉を備え、前記第１の溶融炉は前記芯線を挿通可能な第１の押出穴を有しており、加熱溶融された前記合成樹脂材を内包した前記第１の溶融炉内に、前記芯線を挿入し、前記第１の押出穴から取り出すことで、前記第１の押出機は、前記芯線の周囲に前記絶縁体被覆部を成形し、前記第２の押出機は、前記磁性樹脂材を加熱し溶融することが可能であるとともに、前記絶縁体被覆部によって被覆された前記芯線を挿入可能な第２の溶融炉を備え、前記第２の溶融炉は前記絶縁体被覆部に被覆された前記芯線を挿通可能な第２の押出穴を有しており、加熱溶融された前記磁性樹脂材を内包した前記第２の溶融炉内に、前記絶縁体被覆部によって被覆された前記芯線を挿入し前記第２の押出穴から取り出すことで、前記第２の押出機は、前記絶縁体被覆部に被覆された前記芯線の前記凹溝部に前記磁性樹脂材を注入し前記絶縁体被覆部と一体に前記磁性体被覆部を成形する、という特徴を有する。 The cable manufacturing method according to claim 6, wherein the first extruder includes a first melting furnace capable of heating and melting the synthetic resin material and inserting the core wire, The first melting furnace has a first extrusion hole through which the core wire can be inserted, and the core wire is inserted into the first melting furnace containing the heat-melted synthetic resin material, By taking out from the first extrusion hole, the first extruder forms the insulator covering portion around the core wire, and the second extruder heats and melts the magnetic resin material. And a second melting furnace capable of inserting the core wire covered by the insulator covering portion, the second melting furnace being able to insert the core wire covered by the insulator covering portion. The magnetic resin material is heated and melted. By inserting the core wire covered with the insulator covering portion into the second melting furnace wrapped and taking out from the second extrusion hole, the second extruder is attached to the insulator covering portion. The magnetic resin material is injected into the recessed groove portion of the coated core wire, and the magnetic body covering portion is formed integrally with the insulator covering portion.
　請求項７に記載のケーブルの製造方法は、前記第１の押出穴は、前記凹溝部を螺旋状の凹溝に加工する凹溝加工機構を備えており、前記凹溝加工機構は前記芯線を挿通可能なノズル部を備え、前記ノズル部は内周面にヒダ状の突部を有し、前記芯線を中心として回転可能に設けられ、前記突部を回転させた状態の前記ノズル部を介して前記合成樹脂材に被覆された前記芯線を前記第１の押出機から取り出すことで螺旋状の前記凹溝部を有する前記絶縁体被覆部を形成する、という特徴を有する。 The cable manufacturing method according to claim 7, wherein the first extrusion hole includes a concave groove processing mechanism that processes the concave groove portion into a spiral concave groove, and the concave groove processing mechanism includes the core wire. A nozzle portion that can be inserted, the nozzle portion having a ridge-shaped protrusion on an inner peripheral surface, provided rotatably about the core wire, and through the nozzle portion in a state in which the protrusion is rotated. The core covered with the synthetic resin material is taken out from the first extruder to form the insulator covering portion having the spiral groove.
　請求項８に記載のケーブルの製造方法は、前記第２の溶融炉内において、前記絶縁体被覆部に被覆された前記芯線の周囲に付着した前記磁性樹脂材は、前記凹溝部内に注入された前記磁性樹脂材を除いて、前記第２の溶融炉の内壁の前記第２の押出穴末端部により除去されるとともに、前記磁性樹脂材に含まれる前記磁性体は前記芯線の中心に対して同心円状に層を成すように配向する、という特徴を有する。 The cable manufacturing method according to claim 8, wherein in the second melting furnace, the magnetic resin material attached around the core wire covered with the insulator covering portion is injected into the concave groove portion. Except for the magnetic resin material, the second extrusion hole end portion of the inner wall of the second melting furnace is removed, and the magnetic body contained in the magnetic resin material is located with respect to the center of the core wire. It is characterized by being oriented so as to form layers concentrically.
　請求項９に記載のケーブルの製造方法は、前記凹溝部の深さを１ｍｍ以下に形成する、という特徴を有する。 The cable manufacturing method according to claim 9 is characterized in that the depth of the concave groove portion is 1 mm or less.
　請求項１の発明によれば、凹溝部を有する絶縁体被覆部で芯線の周囲を被覆し、凹溝部内に扁平状磁性粉末を含有する磁性体被覆部を配置したことで、従来のケーブと比べて同等以上のノイズを抑制する効果が得られるとともに、より線径が細いケーブルを形成することが可能となる、という効果を奏する。 According to the invention of claim 1, by covering the periphery of the core wire with the insulator covering portion having the concave groove portion and arranging the magnetic body covering portion containing the flat magnetic powder in the concave groove portion, In addition to the effect of suppressing noise equal to or higher than that, it is possible to form a cable with a thinner wire diameter.
　請求項２の発明によれば、扁平形状の扁平状磁性粉末が層を成すように配向することで、仮に粒状の磁性粉末を用いた場合と比較して、磁性体粉末同士が重なり合い、隙間が小さくなりより効率よくノイズを抑制することが可能となる、という効果を奏する。 According to the second aspect of the present invention, the magnetic powders are overlapped with each other and the gaps are formed as compared with the case where the granular magnetic powder is used by orienting the flat-shaped flat magnetic powder to form a layer. There is an effect that it becomes smaller and noise can be suppressed more efficiently.
　請求項３の発明によれば、広範囲の高周波領域において安定したノイズ抑制効果を発揮することができる、という効果を奏する。 According to the invention of claim 3, there is an effect that a stable noise suppression effect can be exhibited in a wide range of high frequency regions.
　請求項４の発明によれば、磁性体被覆部の厚さを１ｍｍ以下にすることで、磁性体被覆部を形成する際に、扁平状磁性粉末を芯線の中心に対して同心円状に層を成すように配向させることができる、という効果を奏する。 According to the invention of claim 4, when the magnetic body covering portion is formed by setting the thickness of the magnetic body covering portion to 1 mm or less, the flat magnetic powder is formed concentrically with respect to the center of the core wire. The effect that it can orientate so that it may comprise is produced.
　請求項５の発明によれば、芯線を絶縁体被覆部で被覆し、絶縁体被覆部に設けた螺旋状の凹溝部内に磁性樹脂材を注入し一体に成形することで、従来の芯線に磁性体のシートを巻きつける製造方法と比べると、より容易な製造方法で同等以上のノイズ抑制効果を有した線径の細いケーブルを実現できる、という効果を奏する。 According to the invention of claim 5, the core wire is covered with the insulator covering portion, and the magnetic resin material is injected into the spiral groove portion provided in the insulator covering portion so as to be integrally molded. Compared with a manufacturing method in which a sheet of magnetic material is wound, there is an effect that it is possible to realize a cable with a thin wire diameter having a noise suppressing effect equal to or higher than that by an easier manufacturing method.
　請求項６の発明によれば、成型加工により芯線の外周を合成樹脂材および磁性樹脂材とで被覆することで、従来の芯線に磁性体のシートを巻きつける方法と比べると、より容易な製造方法でケーブルを実現できる、という効果を奏する。 According to the sixth aspect of the present invention, the outer periphery of the core wire is covered with a synthetic resin material and a magnetic resin material by molding, thereby making it easier to manufacture than a conventional method of winding a magnetic sheet around a core wire. The cable can be realized by this method.
　請求項７の発明によれば、溶融した合成樹脂材に被覆された前記芯線を突部が回転している状態のノズル部を介して前記第１の押出機から取り出すことで、絶縁体被覆部の外周に螺旋状の凹溝部を容易に加工することができる、という効果を奏する。 According to the invention of claim 7, the insulator covering portion is obtained by taking out the core wire covered with the molten synthetic resin material from the first extruder through the nozzle portion in a state where the protrusion is rotating. There is an effect that it is possible to easily process the spiral groove portion on the outer periphery.
　請求項８の発明によれば、ドクターブレード法を利用した容易な方法で、絶縁体被覆部の外周面から余分な磁性樹脂材を取り除くとともに、凹溝部内に磁性体被覆部を形成することができる、という効果を奏する。 According to the eighth aspect of the present invention, it is possible to remove the excess magnetic resin material from the outer peripheral surface of the insulator covering portion and form the magnetic body covering portion in the recessed groove portion by an easy method using the doctor blade method. There is an effect that it is possible.
　請求項９の発明によれば、凹溝部の深さを１ｍｍ以下にすることで、ドクターブレード法を利用した容易な方法で磁性体被覆部を形成した場合でも、扁平状磁性粉末を芯線の中心に対して同心円状に層を成すように配向させることができる、という効果を奏する。 According to the invention of claim 9, by setting the depth of the concave groove portion to 1 mm or less, even when the magnetic body covering portion is formed by an easy method using the doctor blade method, the flat magnetic powder is placed in the center of the core wire. In contrast, the film can be oriented so as to form a concentric layer.
実施形態のケーブル１の外観を示す略式の斜視図である。It is a rough perspective view showing the appearance of cable 1 of an embodiment. 実施形態のケーブル１の外観を示す略式の側面図である。It is an abbreviated side view showing the appearance of cable 1 of an embodiment. 扁平状磁性粉末３０ａの配向状態を示す断面図である。It is sectional drawing which shows the orientation state of the flat magnetic powder 30a. 磁性体被覆部３０の断面ＳＥＭ写真の一例である。3 is an example of a cross-sectional SEM photograph of a magnetic body covering portion 30. 扁平状磁性粉末３０ａの磁性率磁気損失μ’’の周波数特性を示す図である。It is a figure which shows the frequency characteristic of the magnetic susceptibility magnetic loss μ '' of the flat magnetic powder 30a. 実施形態のケーブル１の製造方法を示す図である。It is a figure which shows the manufacturing method of the cable 1 of embodiment. 実施形態の第１の押出機１１０を示す図である。It is a figure showing the 1st extruder 110 of an embodiment. 実施形態の第２の押出機１２０を示す図である。It is a figure which shows the 2nd extruder 120 of embodiment. ドクターブレード法を用いた装置の一例を示す図である。It is a figure which shows an example of the apparatus using a doctor blade method. ドクターブレード法を活用した装置で磁性樹脂材５０をシート状に形成し、その断面を撮影したＳＥＭ写真である。It is the SEM photograph which formed the magnetic resin material 50 in the sheet form with the apparatus using the doctor blade method, and image | photographed the cross section. 従来のケーブルＣａを示す図である。It is a figure which shows the conventional cable Ca.
　［第１実施形態］
　以下に、本実施形態の被覆に扁平粉末磁性体を使用したケーブルおよびその製造方法について説明する。 [First Embodiment]
Below, the cable which uses a flat powder magnetic body for the coating | cover of this embodiment, and its manufacturing method are demonstrated.
　まず、本実施形態のケーブル１について図１ないし図５を用いて説明する。
　図１は、本実施形態のケーブルの外観を示す図である。図２は、本実施形態のケーブルを示す側面図であり、説明の都合上、磁性体被覆部３０は仮想線で示している。図３は、扁平状磁性粉末３０ａの配向状態を示す図であり、図３（ａ）は図２の断面３－３を示す断面図であり、図３（ｂ）は図３（ａ）のＡ部の拡大図である。図４は、磁性体被覆部３０の断面ＳＥＭ写真の一例である。図５は、扁平状磁性粉末３０ａの磁気損失の特性を示す図である。 First, the cable 1 of this embodiment is demonstrated using FIG. 1 thru | or FIG.
FIG. 1 is a diagram illustrating an appearance of a cable according to the present embodiment. FIG. 2 is a side view showing the cable of the present embodiment. For convenience of explanation, the magnetic body covering portion 30 is indicated by a virtual line. 3 is a view showing the orientation state of the flat magnetic powder 30a, FIG. 3 (a) is a cross-sectional view showing a cross section 3-3 of FIG. 2, and FIG. 3 (b) is a cross-sectional view of FIG. 3 (a). It is an enlarged view of the A section. FIG. 4 is an example of a cross-sectional SEM photograph of the magnetic body covering portion 30. FIG. 5 is a diagram showing the magnetic loss characteristics of the flat magnetic powder 30a.
　本実施形態のケーブル１は、図１および図２に示すように、電気的信号が通る芯線１０と、絶縁体で形成され芯線１０を被覆する絶縁体被覆部２０と、絶縁体被覆部２０の外周に沿って螺旋状に配置された磁性体被覆部３０と、を備えている。
　芯線１０は、導電性を有した線材で形成されている。 As shown in FIGS. 1 and 2, the cable 1 of the present embodiment includes a core wire 10 through which an electrical signal passes, an insulator covering portion 20 that is formed of an insulator and covers the core wire 10, and an insulator covering portion 20. And a magnetic body covering portion 30 disposed in a spiral shape along the outer periphery.
The core wire 10 is formed of a conductive wire.
　絶縁体被覆部２０は、芯線１０の周囲を被覆し、絶縁性および可撓性を有した合成樹脂材４０（図７（ｂ）参照）によって円筒状に形成されている。また、芯線１０の長さ方向に沿って外周に螺旋状の凹溝部２０ａを有している。 The insulator covering portion 20 is formed in a cylindrical shape by a synthetic resin material 40 (see FIG. 7B) that covers the periphery of the core wire 10 and has insulating properties and flexibility. Moreover, it has the spiral groove part 20a on the outer periphery along the length direction of the core wire 10. FIG.
　磁性体被覆部３０は、扁平状磁性粉末３０ａを含有する絶縁体である磁性樹脂材５０（図８（ｂ）参照）で形成され、絶縁体被覆部２０の凹溝部２０ａ内に一体に設けられるとともに、絶縁体被覆部２０の外周面と面一に設けられている。 The magnetic body covering portion 30 is formed of a magnetic resin material 50 (see FIG. 8B) that is an insulator containing the flat magnetic powder 30a, and is provided integrally in the recessed groove portion 20a of the insulating body covering portion 20. At the same time, it is provided flush with the outer peripheral surface of the insulator covering portion 20.
　また、磁性体被覆部３０を形成する磁性樹脂材５０は、図３（ｂ）に示すように（図４参照）、絶縁物３０ｂ内に扁平状磁性粉末３０ａが含有されている。絶縁物３０ｂの内部において、扁平状磁性粉末３０ａは、芯線１０の中心に対して同心円状に層を成すように配向している。 Further, as shown in FIG. 3B (see FIG. 4), the magnetic resin material 50 forming the magnetic body covering portion 30 contains the flat magnetic powder 30a in the insulator 30b. In the insulator 30b, the flat magnetic powder 30a is oriented so as to be concentrically layered with respect to the center of the core wire 10.
　ここで、扁平状磁性粉末３０ａについて簡単に説明する。
　詳細の説明は割愛するが、扁平状磁性粉末３０ａは、鉄を主成分とする材料、例えばパーマロイ（Ｆｅ－Ｎｉ合金）を用い、水アトマイズ法により作成された粒状の磁性粉末を分級して粒度を揃え、遊星撹拌型ボールミル等の装置を用いて扁平状の磁性粉末に加工したものである。 Here, the flat magnetic powder 30a will be briefly described.
Although the detailed description is omitted, the flat magnetic powder 30a is obtained by classifying granular magnetic powder prepared by a water atomizing method using a material containing iron as a main component, for example, permalloy (Fe—Ni alloy). And processed into a flat magnetic powder using an apparatus such as a planetary stirring ball mill.
　なお、扁平状に加工することで扁平状磁性粉末３０ａの内部に内部応力を生じることもあるので、必要に応じて、内部応力を緩和させるためにアニール処理を施しても良い。 In addition, since an internal stress may be generated inside the flat magnetic powder 30a by processing into a flat shape, an annealing treatment may be performed to relieve the internal stress as necessary.
　また、扁平状磁性粉末３０ａの磁性率磁気損失μ’’は、図５に示すように、周波数帯が２０Ｍｈｚから１Ｇｈｚの範囲において、１５以上である。この磁性率磁気損失μ’’は、大きければ大きいほど電磁界エネルギーを熱に変換する効率が高く、ひいては電磁波を吸収する電磁波吸収特性が高くなる。
　また、磁性体被覆部３０の厚さを１ｍｍ以下に形成している。 Further, as shown in FIG. 5, the magnetic loss magnetic loss μ ″ of the flat magnetic powder 30a is 15 or more in the frequency band of 20 Mhz to 1 Ghz. The larger the magnetic susceptibility magnetic loss μ ″, the higher the efficiency of converting electromagnetic field energy into heat, and the higher the electromagnetic wave absorption characteristics for absorbing electromagnetic waves.
Moreover, the thickness of the magnetic body coating | cover part 30 is formed in 1 mm or less.
　次に、ケーブル１の製造方法について、図６ないし図８を用いて説明する。
　図６は、ケーブル１を製造する製造装置１００の構成を示す図である。図７は、第１の押出機１１０の構造を示す図であり、図７（ａ）は第１の押出機１１０の外観図であり、図７（ｂ）は図７（ａ）の断面７Ｂ－７Ｂを示す断面図であり、図７（ｃ）は図７（ａ）の断面７Ｃ－７Ｃを示す断面図である。 Next, the manufacturing method of the cable 1 is demonstrated using FIG. 6 thru | or FIG.
FIG. 6 is a diagram illustrating a configuration of a manufacturing apparatus 100 that manufactures the cable 1. FIG. 7 is a view showing the structure of the first extruder 110, FIG. 7 (a) is an external view of the first extruder 110, and FIG. 7 (b) is a cross section 7B of FIG. 7 (a). FIG. 7C is a cross-sectional view showing a cross section 7C-7C of FIG. 7A.
　図８は、第２の押出機１２０の構造を示す図であり、図８（ａ）は第２の押出機１２０の外観図であり、図８（ｂ）は図８（ａ）の断面８Ｂ－８Ｂを示す断面図であり、図８（ｃ）は図８（ｂ）のＥ部を示す拡大図である。 FIG. 8 is a view showing the structure of the second extruder 120, FIG. 8A is an external view of the second extruder 120, and FIG. 8B is a cross section 8B of FIG. 8A. FIG. 8C is a cross-sectional view showing −8B, and FIG. 8C is an enlarged view showing a portion E of FIG. 8B.
　先ず始めに、製造装置１００の構成とケーブル１を製造する流れについて図６を用いて説明する。 First, the configuration of the manufacturing apparatus 100 and the flow of manufacturing the cable 1 will be described with reference to FIG.
　ケーブル１を製造する製造装置１００は、図６に示すように、絶縁体被覆部２０を形成する合成樹脂材４０を加熱溶融して押出すことが可能な第１の押出機１１０と、磁性体被覆部３０を形成する磁性樹脂材５０を加熱溶融して押出すことが可能な第２の押出機１２０と、を備えている。 As shown in FIG. 6, the manufacturing apparatus 100 that manufactures the cable 1 includes a first extruder 110 that can heat and melt and extrude the synthetic resin material 40 that forms the insulator covering portion 20, and a magnetic body. And a second extruder 120 capable of heating and melting the magnetic resin material 50 forming the covering portion 30 and extruding the same.
　ケーブル１を製造する流れは、図６のＢから順番に示すように、芯線１０を第１の押出機１１０に設置し加工することで、芯線１０の周囲に絶縁体被覆部２０が形成される。次に、絶縁体被覆部２０に被覆された芯線１０を第２の押出機１２０に設置し加工することで、凹溝部２０ａ内に絶縁体被覆部２０と一体に磁性体被覆部３０が形成され、ケーブル１となる。 As shown in order from B in FIG. 6, the flow of manufacturing the cable 1 is performed by installing the core wire 10 in the first extruder 110 and processing it, so that the insulator covering portion 20 is formed around the core wire 10. . Next, the core wire 10 covered with the insulator covering portion 20 is installed and processed in the second extruder 120, so that the magnetic covering portion 30 is formed integrally with the insulator covering portion 20 in the recessed groove portion 20a. The cable 1 is obtained.
　なお、図６に示すケーブル１を製造する製造装置１００の図は概念図であり、製造装置１００の形状等は図に示す限りではない。 In addition, the figure of the manufacturing apparatus 100 which manufactures the cable 1 shown in FIG. 6 is a conceptual diagram, and the shape of the manufacturing apparatus 100 etc. are not necessarily shown in a figure.
　次に、第１の押出機１１０について図７を用いて説明する。
　第１の押出機１１０は、芯線１０の周囲に合成樹脂材で絶縁体被覆部２０を円筒状に成形し被覆するとともに、絶縁体被覆部２０の外周に螺旋状の凹溝部２０ａを形成することができる。 Next, the first extruder 110 will be described with reference to FIG.
The first extruder 110 forms and coats the insulator covering portion 20 in a cylindrical shape around the core wire 10 with a synthetic resin material, and forms a spiral groove 20 a on the outer periphery of the insulator covering portion 20. Can do.
　第１の押出機１１０は、図７に示すように、合成樹脂材４０を加熱し溶融することが可能であるとともに芯線１０を挿入可能な第１の溶融炉１１１を備え、第１の溶融炉１１１は芯線１０を挿通可能な第１の押出穴１１１ａを有している。加熱溶融された合成樹脂材４０を内包した第１の溶融炉１１１内に、芯線１０を挿入し、第１の押出穴１１１ａから取り出すことで、第１の押出機１１０は芯線１０の周囲に絶縁体被覆部２０を成形することができる。 As shown in FIG. 7, the first extruder 110 includes a first melting furnace 111 that can heat and melt the synthetic resin material 40 and can insert the core wire 10. 111 has the 1st extrusion hole 111a which can insert the core wire 10. FIG. The first extruder 110 is insulated around the core wire 10 by inserting the core wire 10 into the first melting furnace 111 containing the heat-melted synthetic resin material 40 and taking it out from the first extrusion hole 111a. The body covering portion 20 can be formed.
　また、第１の押出穴１１１ａは、絶縁体被覆部２０の外周に凹溝部２０ａを加工する凹溝加工機構１１２を備えている。凹溝加工機構１１２は芯線１０を挿通可能なノズル部１１２ａを備え、ノズル部１１２ａは内周面にヒダ状の突部１１２ｂを有し、芯線１０を中心として図７（ｃ）に示す矢印Ｄ方向に回転可能に設けられている。 Further, the first extrusion hole 111 a includes a groove processing mechanism 112 that processes the groove 20 a on the outer periphery of the insulator covering portion 20. The groove processing mechanism 112 includes a nozzle portion 112a through which the core wire 10 can be inserted. The nozzle portion 112a has a pleated protrusion 112b on the inner peripheral surface, and an arrow D shown in FIG. It is provided to be rotatable in the direction.
　凹溝加工機構１１２は一定の方向へ一定の速度で回転しており、それに伴いノズル部１１２ａの内周面に設けられた突部１１２ｂも回転する。突部１１２ｂが回転した状態のノズル部１１２ａを介して合成樹脂材４０に被覆された芯線１０を第１の押出機１１０から取り出すことで周囲に螺旋状の凹溝部２０ａを有する絶縁体被覆部２０が形成される。
　また、このとき、凹溝部２０ａの深さは１ｍｍ以下に形成する。 The concave groove machining mechanism 112 rotates in a constant direction at a constant speed, and accordingly, the projection 112b provided on the inner peripheral surface of the nozzle portion 112a also rotates. The insulator covering portion 20 having a spiral groove portion 20a around the core wire 10 covered with the synthetic resin material 40 is taken out from the first extruder 110 through the nozzle portion 112a in a state where the protrusion 112b is rotated. Is formed.
At this time, the depth of the groove 20a is 1 mm or less.
　このようにして形成された絶縁体被覆部２０を冷却することで絶縁体被覆部２０に被覆された芯線１０が形成される。 The core wire 10 covered with the insulator covering portion 20 is formed by cooling the insulator covering portion 20 thus formed.
　次に、第２の押出機１２０について図８を用いて説明する。
　第２の押出機１２０は、絶縁体被覆部２０で被覆された芯線１０の凹溝部２０ａに磁性樹脂材５０を注入し、絶縁体被覆部２０と一体に磁性体被覆部３０を成形する。 Next, the second extruder 120 will be described with reference to FIG.
The second extruder 120 injects the magnetic resin material 50 into the groove 20 a of the core wire 10 covered with the insulator covering portion 20, and forms the magnetic body covering portion 30 integrally with the insulator covering portion 20.
　第２の押出機１２０は、図８に示すように、磁性樹脂材５０を加熱し溶融することが可能であるとともに、絶縁体被覆部２０によって被覆された芯線１０を挿入可能な第２の溶融炉１２１を備えている。 As shown in FIG. 8, the second extruder 120 can heat and melt the magnetic resin material 50 and can insert the core wire 10 covered with the insulator covering portion 20. A furnace 121 is provided.
　第２の溶融炉１２１は絶縁体被覆部２０に被覆された芯線１０を挿通可能な第２の押出穴１２１ａを有しており、加熱溶融された磁性樹脂材５０を内包した第２の溶融炉１２１内に、絶縁体被覆部２０によって被覆された芯線１０を挿入し、第２の押出穴１２１ａから取り出すことで、第２の押出機１２０は、絶縁体被覆部２０に被覆された芯線１０の凹溝部２０ａに磁性樹脂材５０を注入し絶縁体被覆部２０と一体に磁性体被覆部３０を成形する。 The second melting furnace 121 has a second extrusion hole 121a into which the core wire 10 covered by the insulator covering portion 20 can be inserted, and includes a magnetic resin material 50 that is heated and melted. The core wire 10 covered with the insulator covering portion 20 is inserted into the core 121 and taken out from the second push-out hole 121a, so that the second extruder 120 has the core wire 10 covered with the insulator covering portion 20 The magnetic resin material 50 is injected into the recessed groove portion 20 a and the magnetic body covering portion 30 is formed integrally with the insulator covering portion 20.
　また、第２の溶融炉１２１内において、絶縁体被覆部２０に被覆された芯線１０の周囲に付着した磁性樹脂材５０は、凹溝部２０ａ内に注入された磁性樹脂材５０を除いて、第２の溶融炉１２１の内壁に設けられた拭き取り部１２１ｂ（第２の押出穴末端部）により除去される。 In addition, in the second melting furnace 121, the magnetic resin material 50 adhered around the core wire 10 covered with the insulator covering portion 20 is the same as the first, except for the magnetic resin material 50 injected into the concave groove portion 20a. 2 is removed by a wiping portion 121b (second extrusion hole end portion) provided on the inner wall of the second melting furnace 121.
　拭き取り部１２１ｂと絶縁体被覆部２０との間隔を所定の間隔にすることで、拭き取り部１２１ｂが余分な磁性樹脂材５０を除去することが可能となる。 By setting the interval between the wiping portion 121b and the insulator covering portion 20 to a predetermined interval, the wiping portion 121b can remove the excess magnetic resin material 50.
　このように、拭き取り部１２１ｂが余分な磁性樹脂材５０を除去できるのは、拭き取り部１２１ｂと絶縁体被覆部２０との間隔を所定の間隔にすることで、ドクターブレード法と同様の構造を形成しているためである。 Thus, the wiping portion 121b can remove the excess magnetic resin material 50 by forming the same structure as the doctor blade method by setting the interval between the wiping portion 121b and the insulator covering portion 20 to a predetermined interval. It is because it is doing.
　以下、ドクターブレード法について図９を用いて簡単に説明する。図９はドクターブレード法を用いた装置の一例を示す図である。 Hereinafter, the doctor blade method will be briefly described with reference to FIG. FIG. 9 is a diagram showing an example of an apparatus using a doctor blade method.
　ドクターブレード法は、薄膜やフィルムなどを形成するために用いられる工法の一つである。ドクターブレード法を用いた装置は、図９に示すように、上下動することで薄膜などの厚さを調整可能なブレードＢＬと、ブレードＢＬとともに薄膜などの材料となるスラリーＳＬを容れる容器となる本体ＢＥと、スラリーＳＬを搬送する基材ＣＴとを備えている。 The doctor blade method is one of the methods used to form thin films and films. As shown in FIG. 9, the apparatus using the doctor blade method is a blade BL that can adjust the thickness of a thin film or the like by moving up and down, and a container that holds slurry SL that is a material such as a thin film together with the blade BL. The main body BE and the base material CT which conveys the slurry SL are provided.
　本体ＢＥとブレードＢＬとによって形成される容器部ＰＴにはスラリーＳＬを貯めることができる。また、容器部ＰＴの底部には基材ＣＴが配置され、基材ＣＴは図９に示す矢印Ｆ方向に一定の速度で移動している。 The slurry SL can be stored in the container part PT formed by the main body BE and the blade BL. In addition, a base material CT is disposed at the bottom of the container part PT, and the base material CT moves at a constant speed in the direction of arrow F shown in FIG.
　また、基材ＣＴとブレードＢＬとの間には規定の間隔の隙間を有し基材ＣＴとほぼ同じ幅の排出孔ＧＥが設けられ、基材ＣＴが矢印Ｆ方向に一定の速度で移動することで、基材ＣＴとともにスラリーＳＬが排出孔ＧＡを通過して容器部ＰＴの外部へ移動する。 In addition, a discharge hole GE having a predetermined gap is provided between the base CT and the blade BL and has the same width as the base CT, and the base CT moves at a constant speed in the direction of arrow F. Thus, the slurry SL together with the base material CT passes through the discharge hole GA and moves to the outside of the container part PT.
　このとき、排出孔ＧＡを通過して容器部ＰＴの外部へ移動することで、基材ＣＴ上には一定の厚さを持ったスラリーＳＬが配置され、これを乾燥させることで薄膜やフィルムなどが形成される。 At this time, the slurry SL having a certain thickness is disposed on the base material CT by passing through the discharge hole GA and moving to the outside of the container part PT. Is formed.
　本実施形態においては、第２の溶融炉１２１が容器部ＰＴの役割を成し、拭き取り部１２１ｂがブレードＢＬの役割を成し、絶縁体被覆部２０によって被覆された芯線１０が基材ＣＴの役割を成すことでドクターブレード法と同様の構造を形成している。 In the present embodiment, the second melting furnace 121 serves as the container part PT, the wiping part 121b serves as the blade BL, and the core wire 10 covered by the insulator covering part 20 is the base material CT. By forming a role, the same structure as the doctor blade method is formed.
　ドクターブレード法がブレードＢＬの位置を調整することで均一な膜厚のスラリーを形成するように、本実施形態においては拭き取り部１２１ｂと絶縁体被覆部２０との間隔を所定の間隔にすることで、余分な磁性樹脂材５０を除去することが可能となる。 In this embodiment, the distance between the wiping portion 121b and the insulator covering portion 20 is set to a predetermined interval so that the doctor blade method forms a slurry having a uniform film thickness by adjusting the position of the blade BL. It becomes possible to remove the excess magnetic resin material 50.
　また、拭き取り部１２１ｂにより絶縁体被覆部２０に付着した余分な磁性樹脂材５０を除去する際に、拭き取り部１２１ｂが凹溝部２０ａ内に注入された磁性樹脂材５０を均すことで、磁性樹脂材５０に含まれる扁平状磁性粉末３０ａは芯線１０の中心に対して同心円状に層を成すように配向する。 Further, when the excess magnetic resin material 50 attached to the insulator covering portion 20 is removed by the wiping portion 121b, the wiping portion 121b leveles the magnetic resin material 50 injected into the concave groove portion 20a, so that the magnetic resin The flat magnetic powder 30 a included in the material 50 is oriented so as to be concentrically layered with respect to the center of the core wire 10.
　このように磁性樹脂材５０に含まれる扁平状磁性粉末３０ａが芯線１０の中心に対して同心円状に層を成すように配向するのは、磁性体被覆部３０の厚みを１ｍｍ以下に管理するとともに凹溝部２０ａの深さを１ｍｍ以下に管理しドクターブレード法と同様の方法で余分な磁性樹脂材５０を除去したためである。 Thus, the flat magnetic powder 30a contained in the magnetic resin material 50 is oriented so as to form a layer concentrically with respect to the center of the core wire 10 while managing the thickness of the magnetic body covering portion 30 to 1 mm or less. This is because the depth of the concave groove 20a is controlled to 1 mm or less, and the excess magnetic resin material 50 is removed by a method similar to the doctor blade method.
　図１０は、ドクターブレード法を活用した装置で磁性樹脂材５０をシート状に形成し、その断面を撮影したＳＥＭ写真である。図１０（ａ）は磁性樹脂材５０からなるシートの厚さを１ｍｍより厚くした場合の断面を撮影したＳＥＭ写真であり、図１０（ｂ）は、磁性樹脂材５０からなるシートの厚さを１ｍｍ以下にした場合の断面を撮影したＳＥＭ写真である。 FIG. 10 is an SEM photograph in which the magnetic resin material 50 is formed in a sheet shape with an apparatus utilizing the doctor blade method, and a cross section thereof is photographed. FIG. 10A is an SEM photograph showing a cross section when the thickness of the sheet made of the magnetic resin material 50 is thicker than 1 mm, and FIG. 10B shows the thickness of the sheet made of the magnetic resin material 50. It is a SEM photograph which photoed the section at the time of making it 1 mm or less.
　磁性樹脂材５０からなるシートの厚さを１ｍｍより厚くした場合、図１０（ａ）のＧ部に示すように、扁平状磁性粉末３０ａの配向が乱れやすいのに対し、磁性樹脂材５０からなるシートの厚さを１ｍｍ以下にした場合、図１０（ｂ）に示すように扁平状磁性粉末３０ａの配向の乱れがなくなる。 When the thickness of the sheet made of the magnetic resin material 50 is thicker than 1 mm, the orientation of the flat magnetic powder 30a is likely to be disturbed as shown in part G of FIG. When the thickness of the sheet is 1 mm or less, as shown in FIG. 10B, the orientation of the flat magnetic powder 30a is not disturbed.
　上記と同様に磁性体被覆部３０の厚さを１ｍｍ以下にすることで、磁性樹脂材５０内の扁平状磁性粉末３０ａの配向の乱れはなくなり、扁平状磁性粉末３０ａは芯線１０の中心に対して同心円状に層を成すように配向する。 Similarly to the above, by making the thickness of the magnetic body covering portion 30 1 mm or less, the orientation of the flat magnetic powder 30 a in the magnetic resin material 50 is not disturbed, and the flat magnetic powder 30 a is in the center of the core wire 10. The layers are oriented in a concentric manner.
　このようにして形成された磁性体被覆部３０を冷却することで絶縁体被覆部２０および磁性体被覆部３０とに被覆されたケーブル１が形成される。 The cable 1 covered with the insulator covering portion 20 and the magnetic covering portion 30 is formed by cooling the magnetic covering portion 30 thus formed.
　以下、本実施形態としたことによる効果について説明する。
　本実施形態のケーブル１では、芯線１０は絶縁体で形成された絶縁体被覆部２０に被覆され、絶縁体被覆部２０の外周に形成された凹溝部２０ａ内に扁平状磁性粉末３０ａを含有する磁性体被覆部３０が絶縁体被覆部２０と一体に設けられている。 Hereinafter, the effect by having set it as this embodiment is demonstrated.
In the cable 1 of the present embodiment, the core wire 10 is covered with the insulator covering portion 20 formed of an insulator, and the flat magnetic powder 30a is contained in the recessed groove portion 20a formed on the outer periphery of the insulator covering portion 20. The magnetic body covering portion 30 is provided integrally with the insulator covering portion 20.
　これにより、凹溝部２０ａを有する絶縁体被覆部２０で芯線１０の周囲を被覆し、凹溝部２０ａ内に扁平状磁性粉末３０ａを含有する磁性体被覆部３０を配置したことで、従来のケーブと比べて同等以上のノイズを抑制する効果が得られるとともに、より線径が細いケーブルを形成することが可能となる、という効果を奏する。 Thereby, the periphery of the core wire 10 is covered with the insulator covering portion 20 having the recessed groove portion 20a, and the magnetic body covering portion 30 containing the flat magnetic powder 30a is disposed in the recessed groove portion 20a. In addition to the effect of suppressing noise equal to or higher than that, it is possible to form a cable with a thinner wire diameter.
　また、本実施形態のケーブル１では、磁性体被覆部３０に含有される扁平状磁性粉末３０ａは、芯線１０の中心に対して同心円状に層を成すように配向している。 Further, in the cable 1 of the present embodiment, the flat magnetic powder 30 a contained in the magnetic body covering portion 30 is oriented so as to be concentrically layered with respect to the center of the core wire 10.
　これにより、扁平形状の扁平状磁性粉末３０ａが層を成すように配向することで、仮に粒状の磁性粉末を用いた場合と比較して、磁性体粉末同士が重なり合い、隙間が小さくなりより効率よくノイズを抑制することが可能となる、という効果を奏する。 Thereby, by aligning the flat magnetic powder 30a in a flat shape so as to form a layer, the magnetic powders are overlapped with each other and the gap is reduced more efficiently than when the granular magnetic powder is used. There is an effect that noise can be suppressed.
　また、本実施形態のケーブル１では、扁平状磁性粉末３０ａの磁性率磁気損失μ’’は、周波数帯が２０Ｍｈｚから１Ｇｈｚの範囲において、１５以上である。 Further, in the cable 1 of the present embodiment, the magnetic susceptibility magnetic loss μ ″ of the flat magnetic powder 30a is 15 or more in the frequency band of 20 Mhz to 1 Ghz.
　これにより、電磁波を吸収する特性を示す値である磁性率磁気損失μ’’が、周波数帯が２０Ｍｈｚから１Ｇｈｚの広範囲の高周波領域において１５以上の値である為、高周波領域において安定したノイズ抑制効果を発揮することができる、という効果を奏する。 As a result, the magnetic susceptibility magnetic loss μ ″, which is a value indicating the characteristic of absorbing electromagnetic waves, is a value of 15 or more in a wide frequency range of 20 Mhz to 1 Ghz, and therefore a stable noise suppression effect in the high frequency range. The effect that can be exhibited.
　また、本実施形態のケーブル１では、磁性体被覆部３０の厚さを１ｍｍ以下に形成している。 Further, in the cable 1 of the present embodiment, the thickness of the magnetic body covering portion 30 is formed to be 1 mm or less.
　これにより、磁性体被覆部３０の厚さを１ｍｍ以下にすることで、磁性体被覆部３０を形成する際に、扁平状磁性粉末３０ａを芯線１０の中心に対して同心円状に層を成すように配向させることができる。 Thus, by forming the magnetic body covering portion 30 with the thickness of the magnetic body covering portion 30 being 1 mm or less, the flat magnetic powder 30a is formed concentrically with respect to the center of the core wire 10. Can be oriented.
　また、本実施形態のケーブル１では、合成樹脂材４０と磁性樹脂材５０とは可撓性を有した材料を用いている。 Further, in the cable 1 of the present embodiment, the synthetic resin material 40 and the magnetic resin material 50 are made of flexible materials.
　これにより、ケーブル１は可撓性を有し、可撓性を有していない場合に比べて、より様々な用途に用いることが可能となる。 Thereby, the cable 1 has flexibility, and can be used for more various applications as compared with the case where the cable 1 does not have flexibility.
　また、本実施形態のケーブル１の製造方法では、合成樹脂材４０を加熱溶融して押出すことが可能な第１の押出機１１０と、磁性樹脂材５０を加熱溶融して押出すことが可能な第２の押出機１２０とを備えている。第１の押出機１１０は、芯線１０の周囲を合成樹脂材４０で円筒状に被覆するとともに外周に螺旋状の凹溝部２０ａを有する絶縁体被覆部２０を成形し、第２の押出機１２０は、絶縁体被覆部２０で被覆された芯線１０の凹溝部２０ａに磁性樹脂材５０を注入し絶縁体被覆部２０と一体に磁性体被覆部３０を成形する製造方法としている。 Moreover, in the manufacturing method of the cable 1 of this embodiment, it is possible to heat and melt and extrude the magnetic resin material 50 and the first extruder 110 that can heat and melt the synthetic resin material 40. Second extruder 120. The first extruder 110 covers the periphery of the core wire 10 with a synthetic resin material 40 in a cylindrical shape, and forms the insulator covering portion 20 having a spiral groove 20a on the outer periphery. The second extruder 120 In the manufacturing method, the magnetic resin material 50 is injected into the groove 20 a of the core wire 10 covered with the insulator covering portion 20, and the magnetic covering portion 30 is molded integrally with the insulator covering portion 20.
　これにより、芯線１０を絶縁体被覆部２０で被覆し、絶縁体被覆部２０に設けた螺旋状の凹溝部２０ａ内に磁性樹脂材５０を注入し一体に成形することで、従来の芯線に磁性体のシートを巻きつける製造方法と比べると、より容易な製造方法で同等以上のノイズ抑制効果を有した線径の細いケーブルを実現できる、という効果を奏する。 Thereby, the core wire 10 is covered with the insulator covering portion 20, and the magnetic resin material 50 is injected into the spiral concave groove portion 20a provided in the insulator covering portion 20 so as to be integrally molded. Compared with a manufacturing method in which a body sheet is wound, an effect is obtained that a cable having a thin wire diameter having a noise suppressing effect equal to or higher than that can be realized by an easier manufacturing method.
　また、本実施形態のケーブル１の製造方法では、第１の押出機１１０は、合成樹脂材４０を加熱し溶融することが可能であるとともに芯線１０を挿入可能な第１の溶融炉１１１を備え、第１の溶融炉１１１は芯線１０を挿通可能な第１の押出穴１１１ａを有しており、加熱溶融された合成樹脂材４０を内包した第１の溶融炉１１１内に、芯線１０を挿入し、第１の押出穴１１１ａから取り出すことで、第１の押出機１１０は、芯線１０の周囲に絶縁体被覆部２０を成形する。 Moreover, in the manufacturing method of the cable 1 of the present embodiment, the first extruder 110 includes the first melting furnace 111 that can heat and melt the synthetic resin material 40 and can insert the core wire 10. The first melting furnace 111 has a first extrusion hole 111a through which the core wire 10 can be inserted, and the core wire 10 is inserted into the first melting furnace 111 containing the heat-melted synthetic resin material 40. And the 1st extruder 110 shape | molds the insulator coating | coated part 20 around the core wire 10 by taking out from the 1st extrusion hole 111a.
　また、第２の押出機１２０は、磁性樹脂材５０を加熱し溶融することが可能であるとともに、絶縁体被覆部２０によって被覆された芯線１０を挿入可能な第２の溶融炉１２１を備え、第２の溶融炉１２１は絶縁体被覆部２０に被覆された芯線１０を挿通可能な第２の押出穴１２１ａを有しており、加熱溶融された磁性樹脂材５０を内包した第２の溶融炉１２１内に、絶縁体被覆部２０によって被覆された芯線１０を挿入し第２の押出穴１２１ａから取り出すことで、第２の押出機１２０は、絶縁体被覆部２０に被覆された芯線１０の凹溝部２０ａに磁性樹脂材５０を注入し絶縁体被覆部２０と一体に磁性体被覆部３０を成形する製造方法としている。 The second extruder 120 includes a second melting furnace 121 that can heat and melt the magnetic resin material 50 and can insert the core wire 10 covered by the insulator covering portion 20. The second melting furnace 121 has a second extrusion hole 121a into which the core wire 10 covered by the insulator covering portion 20 can be inserted, and includes a magnetic resin material 50 that is heated and melted. By inserting the core wire 10 covered with the insulator covering portion 20 into the 121 and taking it out from the second push-out hole 121a, the second extruder 120 has a concave portion of the core wire 10 covered with the insulator cover portion 20. In this manufacturing method, the magnetic resin material 50 is injected into the groove portion 20 a and the magnetic body covering portion 30 is formed integrally with the insulator covering portion 20.
　これにより、成型加工により芯線１０の外周を合成樹脂材および磁性樹脂材とで被覆することで、従来の芯線に磁性体のシートを巻きつける方法と比べると、より容易な製造方法でケーブルを実現できる、という効果を奏する。 As a result, the outer periphery of the core wire 10 is covered with a synthetic resin material and a magnetic resin material by molding, thereby realizing a cable with an easier manufacturing method compared to the conventional method of winding a magnetic sheet around a core wire. There is an effect that it is possible.
　また、本実施形態のケーブル１の製造方法では、第１の押出穴１１１ａは、凹溝部２０ａを螺旋状の凹溝に加工する凹溝加工機構１１２を備えており、凹溝加工機構１１２は芯線１０を挿通可能なノズル部１１２ａを備え、ノズル部１１２ａは内周面にヒダ状の突部１１２ｂを有し、芯線１０を中心として回転可能に設けられ、突部１１２ｂを回転している状態のノズル部１１２ａを介して合成樹脂材４０に被覆された芯線１０を第１の押出機１１０から取り出すことで螺旋状の凹溝部２０ａを有する絶縁体被覆部２０を形成する製造方法とした。 Moreover, in the manufacturing method of the cable 1 of this embodiment, the 1st extrusion hole 111a is provided with the ditch | groove processing mechanism 112 which processes the ditch | groove part 20a into a helical ditch | groove, and the ditch | groove processing mechanism 112 is a core wire. 10 is provided with a nozzle portion 112a through which the nozzle portion 112a can be inserted. The nozzle portion 112a has a ridge-like protrusion 112b on the inner peripheral surface, is rotatably provided around the core wire 10, and is in a state of rotating the protrusion 112b. It was set as the manufacturing method which forms the insulator coating | coated part 20 which has the spiral groove part 20a by taking out the core wire 10 coat | covered with the synthetic resin material 40 from the 1st extruder 110 through the nozzle part 112a.
　これにより、溶融した合成樹脂材４０に被覆された芯線１０を突部１１２ｂが回転した状態のノズル部１１２ａを介して第１の押出機１１０から取り出すことで、絶縁体被覆部２０の外周に螺旋状の凹溝部２０ａを容易に加工することができる、という効果を奏する。 As a result, the core wire 10 covered with the molten synthetic resin material 40 is taken out from the first extruder 110 through the nozzle portion 112a in a state in which the protrusion 112b is rotated, so that the outer periphery of the insulator covering portion 20 is spiraled. There is an effect that the concave groove portion 20a can be easily processed.
　また、これにより、突部１１２ｂの回転速度を変更することで、螺旋状に形成された凹溝部２０ａのピッチを容易に変更することができる、という効果を奏する。 In addition, this produces an effect that the pitch of the concave groove 20a formed in a spiral shape can be easily changed by changing the rotation speed of the protrusion 112b.
　また、本実施形態のケーブル１の製造方法では、第２の溶融炉１２１内において、絶縁体被覆部２０に被覆された芯線１０の周囲に付着した磁性樹脂材５０は、凹溝部２０ａ内に注入された磁性樹脂材５０を除いて、第２の溶融炉１２１の拭き取り部１２１ｂにより除去されるとともに、磁性樹脂材５０に含まれる扁平状磁性粉末３０ａは芯線１０の中心に対して同心円状に層を成すように配向する、 Moreover, in the manufacturing method of the cable 1 of this embodiment, the magnetic resin material 50 adhering to the circumference | surroundings of the core wire 10 coat | covered with the insulator coating | coated part 20 in the 2nd melting furnace 121 is inject | poured in the ditch | groove part 20a. The flat magnetic powder 30a contained in the magnetic resin material 50 is concentrically formed with respect to the center of the core wire 10 while being removed by the wiping portion 121b of the second melting furnace 121 except for the magnetic resin material 50 that has been removed. Oriented to form,
　これにより、ドクターブレード法を利用した容易な方法で、絶縁体被覆部２０の外周面から余分な磁性樹脂材５０を取り除くとともに、凹溝部２０ａ内に磁性体被覆部３０を形成することができる、という効果を奏する。 Thereby, while removing the excessive magnetic resin material 50 from the outer peripheral surface of the insulator coating | coated part 20 by the easy method using a doctor blade method, the magnetic body coating | coated part 30 can be formed in the recessed groove part 20a. There is an effect.
　また、本実施形態のケーブル１の製造方法では、凹溝部２０ａの深さを１ｍｍ以下に形成する。 Moreover, in the manufacturing method of the cable 1 of the present embodiment, the depth of the groove 20a is formed to 1 mm or less.
　これにより、凹溝部２０ａの深さを１ｍｍ以下にすることで、ドクターブレード法を利用した容易な方法で磁性体被覆部３０を形成した場合でも、扁平状磁性粉末３０ａを芯線１０の中心に対して同心円状に層を成すように配向させることができる、という効果を奏する。 Thereby, even when the magnetic body covering portion 30 is formed by an easy method using the doctor blade method by setting the depth of the concave groove portion 20a to 1 mm or less, the flat magnetic powder 30a is made to be centered on the center of the core wire 10. Thus, it is possible to align the layers in a concentric manner.
　以上のように、本発明の実施形態に係るケーブルおよびその製造方法を具体的に説明したが、本発明は上記の実施形態に限定されるものではなく、要旨を逸脱しない範囲で種々変更して実施することが可能である。例えば次のように変形して実施することができ、これらの実施形態も本発明の技術的範囲に属する。 As described above, the cable and the manufacturing method thereof according to the embodiment of the present invention have been specifically described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. It is possible to implement. For example, the present invention can be modified as follows, and these embodiments also belong to the technical scope of the present invention.
　（１）本実施形態のケーブル１では、磁性体被覆部３０を螺旋状に配置したが、格子状に配置するなどしても良い。 (1) In the cable 1 of the present embodiment, the magnetic body covering portion 30 is disposed in a spiral shape, but may be disposed in a lattice shape.
　（２）本実施形態のケーブル１では、絶縁体被覆部２０を形成する合成樹脂材４０および磁性体被覆部３０を形成する磁性樹脂材５０は可撓性を有する材料としたが、必ずしも可撓性を有していなくても良い。 (2) In the cable 1 of the present embodiment, the synthetic resin material 40 that forms the insulator covering portion 20 and the magnetic resin material 50 that forms the magnetic covering portion 30 are flexible materials, but are not necessarily flexible. It does not have to have sex.
　（３）本実施形態の製造方法では、扁平状磁性粉末３０ａの作成方法に水アトマイズ法を用いているが、ガスアトマイズ法、液体急冷法等を用いても良い。 (3) In the manufacturing method of the present embodiment, the water atomization method is used as a method for producing the flat magnetic powder 30a, but a gas atomization method, a liquid quenching method, or the like may be used.
　（４）本実施形態の製造装置１００では、拭き取り部１２１ｂは第２の押出穴１２１ａの末端部であり断面形状が直角な図で示しているが、余分な磁性樹脂材５０をより効率よく除去するために、断面形状の角度変更やスキージ状に形成するなどしても良い。 (4) In the manufacturing apparatus 100 of the present embodiment, the wiping portion 121b is a terminal portion of the second extrusion hole 121a and the cross-sectional shape is shown as a right angle, but the excess magnetic resin material 50 is more efficiently removed. In order to achieve this, the angle of the cross-sectional shape may be changed, or a squeegee may be formed.
　（５）本実施形態の製造装置１００では、突部１１２ｂの枚数を１枚としたが、ノイズ抑制効果を損なわない範囲で枚数を増やし、磁性体被覆部３０を２重螺旋状、３重螺旋状などにしても良い。これにより、磁性体被覆部３０の面積が増えることで、ノイズ抑制効果がより高まる。 (5) In the manufacturing apparatus 100 of the present embodiment, the number of the protrusions 112b is one, but the number is increased within a range that does not impair the noise suppression effect, and the magnetic body covering portion 30 is formed in a double spiral or triple spiral. It may be a shape. Thereby, the noise suppression effect increases more because the area of the magnetic body coating | cover part 30 increases.
　（６）本実施形態の製造装置１００では、第１の押出機１１０から絶縁体被覆部２０に被覆された芯線１０を取り出す方向および第２の押出機１２０からケーブル１を取り出す方向を下方にしているが、側方または上方から取り出してもよい。 (6) In the manufacturing apparatus 100 of the present embodiment, the direction of taking out the core wire 10 covered with the insulator covering portion 20 from the first extruder 110 and the direction of taking out the cable 1 from the second extruder 120 are set downward. However, it may be taken out from the side or from above.
　１　　　　ケーブル
　１０　　　芯線
　２０　　　絶縁体被覆部
　２１ａ　　凹溝部
　３０　　　磁性体被覆部
　３０ａ　　扁平状磁性粉末
　３０ｂ　　絶縁物
　４０　　　合成樹脂材
　５０　　　磁性樹脂材
　１００　　製造装置
　１１０　　第１の押出機
　１１１　　第１の溶融炉
　１１１ａ　第１の押出穴
　１１２　　凹溝加工機構
　１１２ａ　ノズル部
　１１２ｂ　突部
　１２０　　第２の押出機
　１２１　　第２の溶融炉
　１２１ａ　第２の押出穴
　１２１ｂ　拭き取り部（第２の押出穴末端部） DESCRIPTION OF SYMBOLS 1 Cable 10 Core wire 20 Insulator coating | cover part 21a Concave groove part 30 Magnetic body coating | cover part 30a Flat magnetic powder 30b Insulator 40 Synthetic resin material 50 Magnetic resin material 100 Manufacturing apparatus 110 1st extruder 111 1st melting furnace 111a 1st 1 Extrusion hole 112 Concave groove processing mechanism 112a Nozzle part 112b Protrusion part 120 Second extruder 121 Second melting furnace 121a Second extrusion hole 121b Wiping part (second extrusion hole terminal part)

Claims (9)

  1. 　電気的信号が通る芯線の外周部に磁性体が配されたケーブルにおいて、
    　前記芯線は、絶縁体で形成された絶縁体被覆部に被覆され、
    　前記絶縁体被覆部は円筒状に形成され前記芯線の長さ方向に沿って外周に螺旋状の凹溝部を有し、
    　前記凹溝部内に扁平状磁性粉末を含有する絶縁体で形成された磁性体被覆部が前記絶縁体被覆部と一体に設けられたケーブル。     In the cable where the magnetic material is arranged on the outer periphery of the core wire through which the electrical signal passes,
    The core wire is covered with an insulator covering portion formed of an insulator,
    The insulator covering portion is formed in a cylindrical shape, and has a spiral groove portion on the outer periphery along the length direction of the core wire,
    A cable in which a magnetic body covering portion formed of an insulator containing a flat magnetic powder is provided integrally with the insulator covering portion in the concave groove portion.
  2. 　前記磁性体被覆部に含有される前記扁平状磁性粉末は、前記芯線の中心に対して同心円状に層を成すように配向していることを特徴とする請求項１に記載のケーブル。 2. The cable according to claim 1, wherein the flat magnetic powder contained in the magnetic body covering portion is oriented so as to form a layer concentrically with respect to the center of the core wire.
  3. 　前記扁平状磁性粉末の磁性率磁気損失は、周波数帯が２０Ｍｈｚから１Ｇｈｚの範囲において、１５以上であることを特徴とする請求項１ないし請求項２に記載のケーブル。 3. The cable according to claim 1, wherein the magnetic loss magnetic loss of the flat magnetic powder is 15 or more in a frequency band of 20 Mhz to 1 Ghz.
  4. 　前記磁性体被覆部の厚さを１ｍｍ以下に形成することを特徴とする請求項1ないし請求項３に記載のケーブル。 The cable according to any one of claims 1 to 3, wherein a thickness of the magnetic body covering portion is formed to be 1 mm or less.
  5. 　芯線の周囲を合成樹脂材で被覆し、前記合成樹脂材で被覆された前記芯線の周囲を磁性体で被覆するケーブルの製造方法において、
    　前記合成樹脂材を加熱溶融して押出すことが可能な第１の押出機と、前記磁性体を含有する磁性樹脂材を加熱溶融して押出すことが可能な第２の押出機とを備え、
    　前記第１の押出機は、前記芯線の周囲を前記合成樹脂材で円筒状に被覆するとともに外周に螺旋状の凹溝部を有する絶縁体被覆部を成形し、
    　前記第２の押出機は、前記絶縁体被覆部で被覆された前記芯線の前記凹溝部に前記磁性樹脂材を注入し前記絶縁体被覆部と一体に磁性体被覆部を成形することを特徴とするケーブルの製造方法。     In the method of manufacturing a cable, the periphery of the core wire is covered with a synthetic resin material, and the periphery of the core wire covered with the synthetic resin material is covered with a magnetic material.
    A first extruder capable of heating and melting the synthetic resin material and a second extruder capable of heating and melting the magnetic resin material containing the magnetic material; ,
    The first extruder is configured to coat the periphery of the core wire in a cylindrical shape with the synthetic resin material and to form an insulator covering portion having a spiral groove on the outer periphery,
    The second extruder is characterized in that the magnetic resin material is injected into the concave groove portion of the core wire covered with the insulator covering portion and the magnetic covering portion is formed integrally with the insulator covering portion. Cable manufacturing method.
  6. 　前記第１の押出機は、前記合成樹脂材を加熱し溶融することが可能であるとともに前記芯線を挿入可能な第１の溶融炉を備え、前記第１の溶融炉は前記芯線を挿通可能な第１の押出穴を有しており、
    　加熱溶融された前記合成樹脂材を内包した前記第１の溶融炉内に、前記芯線を挿入し、前記第１の押出穴から取り出すことで、前記第１の押出機は、前記芯線の周囲に前記絶縁体被覆部を成形し、
    　前記第２の押出機は、前記磁性樹脂材を加熱し溶融することが可能であるとともに、前記絶縁体被覆部によって被覆された前記芯線を挿入可能な第２の溶融炉を備え、前記第２の溶融炉は前記絶縁体被覆部に被覆された前記芯線を挿通可能な第２の押出穴を有しており、
    　加熱溶融された前記磁性樹脂材を内包した前記第２の溶融炉内に、前記絶縁体被覆部によって被覆された前記芯線を挿入し前記第２の押出穴から取り出すことで、前記第２の押出機は、前記絶縁体被覆部に被覆された前記芯線の前記凹溝部に前記磁性樹脂材を注入し前記絶縁体被覆部と一体に前記磁性体被覆部を成形する、
    　ことを特徴とする請求項５に記載のケーブルの製造方法。     The first extruder includes a first melting furnace capable of heating and melting the synthetic resin material and inserting the core wire, and the first melting furnace can be inserted through the core wire. Has a first extrusion hole;
    By inserting the core wire into the first melting furnace containing the synthetic resin material that has been heated and melted and taking it out of the first extrusion hole, the first extruder is placed around the core wire. Forming the insulator covering portion;
    The second extruder includes a second melting furnace capable of heating and melting the magnetic resin material and inserting the core wire covered by the insulator covering portion. The melting furnace has a second extrusion hole through which the core wire coated on the insulator coating portion can be inserted,
    By inserting the core wire covered with the insulator covering portion into the second melting furnace containing the heated and melted magnetic resin material and taking it out from the second extrusion hole, the second extrusion The machine injects the magnetic resin material into the concave groove portion of the core wire covered with the insulator covering portion, and forms the magnetic body covering portion integrally with the insulator covering portion.
    The method for manufacturing a cable according to claim 5.
  7. 　前記第１の押出穴は、前記凹溝部を螺旋状の凹溝に加工する凹溝加工機構を備えており、
    　前記凹溝加工機構は前記芯線を挿通可能なノズル部を備え、
    　前記ノズル部は内周面にヒダ状の突部を有し、前記芯線を中心として回転可能に設けられ、
    　前記突部を回転させた状態の前記ノズル部を介して前記合成樹脂材に被覆された前記芯線を前記第１の押出機から取り出すことで螺旋状の前記凹溝部を有する前記絶縁体被覆部を形成する、
    　ことを特徴とする請求項６に記載のケーブルの製造方法。     The first extrusion hole includes a groove processing mechanism for processing the groove portion into a spiral groove,
    The concave groove processing mechanism includes a nozzle portion through which the core wire can be inserted,
    The nozzle portion has a ridge-like protrusion on the inner peripheral surface, and is provided to be rotatable around the core wire.
    The insulator covering portion having the spiral groove is removed by taking out the core wire covered with the synthetic resin material from the first extruder through the nozzle portion in a state where the protrusion is rotated. Form,
    The method of manufacturing a cable according to claim 6.
  8. 　前記第２の溶融炉内において、前記絶縁体被覆部に被覆された前記芯線の周囲に付着した前記磁性樹脂材は、前記凹溝部内に注入された前記磁性樹脂材を除いて、前記第２の溶融炉の内壁の前記第２の押出穴末端部により除去されるとともに、前記磁性樹脂材に含まれる前記磁性体は前記芯線の中心に対して同心円状に層を成すように配向することを特徴とする請求項５ないし請求項７に記載のケーブルの製造方法。 In the second melting furnace, the magnetic resin material adhering to the periphery of the core wire covered with the insulator covering portion is the second resin except for the magnetic resin material injected into the concave groove portion. The magnetic body contained in the magnetic resin material is oriented so as to form a concentric layer with respect to the center of the core wire. The method for manufacturing a cable according to claim 5, wherein the cable is manufactured.
  9. 　前記凹溝部の深さを１ｍｍ以下に形成することを特徴とする請求項５ないし請求項８に記載の磁性体ケーブルの製造方法。 9. The method of manufacturing a magnetic cable according to claim 5, wherein the depth of the concave groove is 1 mm or less.
PCT/JP2012/053422 2011-03-31 2012-02-14 Cable using flat-shaped powder magnetic material as sheathing thereof, and method of manufacturing same WO2012132589A1 (en)

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