CN110828037A - Double-glass-fiber copper-based alloy lapped wire and preparation method thereof - Google Patents

Double-glass-fiber copper-based alloy lapped wire and preparation method thereof Download PDF

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Publication number
CN110828037A
CN110828037A CN201911146976.9A CN201911146976A CN110828037A CN 110828037 A CN110828037 A CN 110828037A CN 201911146976 A CN201911146976 A CN 201911146976A CN 110828037 A CN110828037 A CN 110828037A
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CN
China
Prior art keywords
layer
wire
wrapping
glass
insulating
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CN201911146976.9A
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Chinese (zh)
Inventor
张祺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Zhongwei Copper Co Ltd
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Anhui Zhongwei Copper Co Ltd
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Priority to CN201911146976.9A priority Critical patent/CN110828037A/en
Publication of CN110828037A publication Critical patent/CN110828037A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/02Disposition of insulation
    • H01B7/0208Cables with several layers of insulating material
    • H01B7/0216Two layers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06Insulating conductors or cables
    • H01B13/065Insulating conductors with lacquers or enamels
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06Insulating conductors or cables
    • H01B13/10Insulating conductors or cables by longitudinal lapping
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/26Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2613Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/02Disposition of insulation
    • H01B7/0241Disposition of insulation comprising one or more helical wrapped layers of insulation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/186Sheaths comprising longitudinal lapped non-metallic layers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1875Multi-layer sheaths

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)

Abstract

The invention provides a double-glass-fiber copper-based alloy lapped wire; the copper wire winding device comprises a wire and a winding layer arranged as an outer layer of a copper wire; the wrapping layer comprises an insulating layer, an anti-cracking layer and a compact layer; the insulating layer includes: the anti-cracking and anti-cracking device comprises an insulating film wrapping layer and an insulating paint layer, wherein the insulating film wrapping layer is arranged between a wire and an anti-cracking layer, the insulating paint layer is arranged between an anti-cracking layer and a compact layer, the wrapping angle of glass filaments in the anti-cracking layer is set to be 45-60 degrees, the wrapping angle of the glass filaments in the compact layer is set to be less than 5 degrees, and the wrapping angle of the glass filaments in the compact layer is set to be 45-60 degrees; the preparation method of the double-glass-fiber copper-based alloy lapped wire comprises the following steps: s1 paying off; s2 straightening and cleaning the lead; s3 wrapping an insulating film; s4 wrapping an anti-cracking layer glass fiber; s5, sintering; s6, impregnating the wrapping wire with insulating paint; s7 lapping a dense layer of glass fiber; s8, cooling; and S9 taking up the wire.

Description

Double-glass-fiber copper-based alloy lapped wire and preparation method thereof
Technical Field
The invention relates to the technical field of enameled wires, in particular to a double-glass-fiber copper-based alloy lapped wire and a preparation method thereof.
Background
The existing double-glass fiber copper flat wire generally adopts a small pitch and a wrapping angle of 1-2 degrees when the glass fiber is wound, the bending and adhesion performance of a winding wire can not meet the requirements when the coil is wound, and an insulating layer is easy to crack on the bending surface of the winding coil in the use process, so that the coil is damaged and the service life is shortened.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a double-glass-fiber copper-based alloy lapped wire and a preparation method thereof.
The invention solves the technical problems through the following technical means:
double glass fiber copper-based alloy lapped wires; the copper wire winding device comprises a wire and a winding layer arranged as an outer layer of a copper wire; the wrapping layer comprises an insulating layer, an anti-cracking layer and a compact layer; the insulating layer includes: insulating film is around package and insulating paint layer, and insulating film sets up between wire and crack control layer around the package, and the insulating paint layer sets up between anti-crack layer and compact layer, anti-crack layer and compact layer are formed by glass silk winding, and the glass silk in the anti-crack layer is around package angle setting 45 between to 60, and the glass silk in the compact layer sets up to being less than 5 around package angle.
As an improvement of the technical scheme, the number of the glass fibers in the anti-cracking layer is two, and the wrapping directions are opposite; the two glass fibers are arranged in the compact layer, and the wrapping directions are opposite.
As an improvement of the technical scheme, the insulating film wrapping layer is formed by alternately wrapping two insulating films, and the wrapping directions of the two insulating films are opposite.
As an improvement of the technical scheme, the wrapping angle of the insulating film in the insulating film wrapping layer is set to be 30-45 degrees.
The preparation method of the double-glass-fiber copper-based alloy lapped wire comprises the following steps:
s1 paying-off
Carrying out constant tension paying-off on the coiled wire;
s2 wire alignment and cleaning
Straightening and cleaning a metal wire: wherein, the alignment adopts a graduated scale; the cleaning device is a nylon wheel, copper ash brought out by the nylon wheel when the nylon wheel contacts the metal conducting wire is absorbed by a funnel-shaped dust collector below the cleaning device, and the surface of the conducting wire is ensured to be clean;
s3 insulation film wrapping
Coating sintering glue on one surface of the insulating film, enabling the surface to be tightly attached to a lead, and performing lapping, wherein the lapping overlapping rate is 50% -75%;
s4 anti-cracking glass fiber wrapping
The two glass fibers are used for wrapping the conducting wire passing through the S3 in a cross wrapping mode, and the wrapping angle is controlled to be 45-60 degrees;
s5 sintering
The lead in the S4 is sintered to form a sintering layer through an inductor of a high-frequency furnace;
s6 wrapping wire impregnating insulating paint
Passing the wire processed by the S5 through an insulating paint box filled with insulating paint;
s7 compact layer glass fiber lapping
The two glass fibers are used for wrapping the conducting wire passing through the S6 in a cross wrapping mode, and the wrapping angle is controlled to be smaller than 5 degrees;
s8 Cooling
The wire processed by the S7 passes through a cooling box filled with cooling water to cool the wire;
s9 line taking-up
And (4) taking up the cooled wire under constant tension.
As an improvement of the technical scheme, the scale of the graduated scale is 2-30 mm; the rotation speed of the nylon wheel is 100-1000 rpm.
As an improvement of the technical scheme, the tension in the S1 and the S9 is controlled within the range of 5-80N.
The invention has the beneficial effects that:
1. the glass fiber in the anti-cracking layer is arranged between 45 degrees and 60 degrees in the wrapping angle, so that the tensile effect can be achieved in the radial direction of the wrapping wire, the wrapping wire cannot crack in the radial direction when being wound and bent, the situation that the service life of the wrapping wire is shortened due to the fact that the wrapping layer of the insulating film of the wrapping wire cracks is prevented, the bending degree of the wrapping wire under the same condition is increased, and the adaptability is wider; the glass fiber wrapping angle in the compact layer is set to be less than 5 degrees, so that the wrapping layer of the wire insulating film, the anti-cracking layer and the insulating paint layer can be tightly attached together, and the influence on the insulativity of the wire insulating film due to the action of external force is avoided;
2. the paying-off and paying-off are set to be constant-tension paying-off and paying-off, so that the lapped wire can move forward at a constant speed in the processing process, the condition of neglect fastening and neglect loosening is avoided, the thickness of an insulating layer of the lapped wire is uneven, and the insulating property is reduced;
drawings
FIG. 1 is a schematic structural diagram of a double-glass-fiber copper-based alloy lapped wire according to an embodiment of the invention;
FIG. 2 is a flow chart of a preparation method of a double-glass-fiber copper-based alloy lapped wire according to an embodiment of the invention;
the cable comprises a wire 1, a lapping layer 2, an insulating layer 21, an insulating film lapping layer 211, an insulating paint layer 212, an anti-cracking layer 22 and a compact layer 23.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Examples
As shown in fig. 1, the double-glass-fiber copper-based alloy lapped wire in the embodiment includes a wire 1 and a lapping layer 2 disposed as an outer layer of a copper wire; the wrapping layer comprises an insulating layer 21, an anti-cracking layer 22 and a compact layer 23; the insulating layer 21 includes: insulating film is around package 211 and insulating paint layer 212, and insulating film sets up between wire 1 and crack control layer 22 around package 211, and insulating paint layer 212 sets up between crack control layer 22 and compact layer 23, crack control layer 22 and compact layer 23 are formed by the glass silk around the package, and the glass silk in crack control layer 22 is around the package angle setting 45 between to 60, and the glass silk in the compact layer 23 is being less than 5 around the package angle setting.
The glass fiber in the anti-cracking layer 22 is arranged at a wrapping angle of 45-60 degrees, so that the anti-tensile effect can be achieved in the radial direction of the wrapping wire, the wrapping wire cannot crack in the radial direction when being wound and bent, the phenomenon that the service life of the wrapping wire is shortened due to the fact that the wrapping layer of the insulating film of the wrapping wire cracks is prevented, the bending degree of the wrapping wire under the same condition is increased, and the adaptability is wider;
the glass fiber in the compact layer 23 is arranged at a wrapping angle of less than 5 degrees, so that the insulating film wrapping layer 211, the anti-cracking layer 22 and the insulating paint layer 212 of the lead 1 can be tightly attached together, and the insulating property of the lead 1 is prevented from being influenced by external force.
The number of the glass fibers in the anti-cracking layer 22 is two, and the wrapping directions are opposite; the number of the glass fibers in the compact layer 23 is two, and the wrapping directions are opposite.
The anti-cracking layer 22 and the compact layer 23 are alternately wrapped by adopting two glass filaments, so that the anti-cracking layer 22 and the compact layer 23 have better mechanical properties, and the phenomenon that the anti-cracking layer 22 and the compact layer 23 are broken when the wrapping wire is bent to influence the insulation property of the wrapping wire is avoided.
The insulating film wrapping layer 211 is formed by alternately wrapping two insulating films, and the wrapping directions of the two insulating films are opposite; the insulating film is more uniformly covered on the lead wire 1, and the insulating property is better.
The lapping angle of the insulating film in the insulating film lapping layer 211 is set to be 30-45 degrees; increase under the condition of guaranteeing the overlapping rate and can promote the tensile property when carrying out the bending around the package, improve the adaptability and the life around the package.
As shown in fig. 2, the preparation method of the double-glass-fiber copper-based alloy lapped wire comprises the following steps:
s1 paying-off
Carrying out constant tension paying-off on the coiled wire;
s2 wire alignment and cleaning
Straightening and cleaning the lead: wherein, the alignment adopts a graduated scale; the cleaning device is a nylon wheel, copper ash brought out by the nylon wheel when the nylon wheel contacts the metal conducting wire is absorbed by a funnel-shaped dust collector below the cleaning device, and the surface of the conducting wire is ensured to be clean;
s3 insulation film wrapping
Coating sintering glue on one surface of the insulating film, enabling the surface to be tightly attached to a lead, and performing lapping, wherein the lapping overlapping rate is 50% -75%;
s4 anti-cracking glass fiber wrapping
The two glass fibers are used for wrapping the conducting wire passing through the S3 in a cross wrapping mode, and the wrapping angle is controlled to be 45-60 degrees;
s5 sintering
The lead wire in the S4 passes through an inductor of a high-frequency furnace, and the lead wire 1 is sintered to form a sintered layer;
s6 wrapping wire impregnating insulating paint
Passing the wire processed by the S5 through an insulating paint box filled with insulating paint;
s7 compact layer glass fiber lapping
Wrapping the conducting wire passing through S6 in a cross wrapping mode, wherein the wrapping angle is controlled to be less than 5 degrees;
s8 Cooling
The wire processed by the S7 passes through a cooling box filled with cooling water to cool the wire;
s9 line taking-up
And (4) taking up the cooled wire under constant tension.
The scale of the graduated scale is 2-30 mm; the rotation speed of the nylon wheel is 100-1000 rpm.
The tension in S1 and S9 is controlled within the range of 5-80N.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (7)

1. Double glass silk copper base alloy is around chartered line its characterized in that: the copper wire winding device comprises a wire and a winding layer arranged as an outer layer of a copper wire; the wrapping layer comprises an insulating layer, an anti-cracking layer and a compact layer; the insulating layer includes: insulating film is around package and insulating paint layer, and insulating film sets up between wire and crack control layer around the package, and the insulating paint layer sets up between anti-crack layer and compact layer, anti-crack layer and compact layer are formed by glass silk winding, and the glass silk in the anti-crack layer is around package angle setting 45 between to 60, and the glass silk in the compact layer sets up to being less than 5 around package angle.
2. The double-glass-fiber copper-based alloy lapped wire according to claim 1, wherein: the two glass fibers are arranged in the anti-cracking layer, and the wrapping directions are opposite; the two glass fibers are arranged in the compact layer, and the wrapping directions are opposite.
3. The double-glass-fiber copper-based alloy lapped wire according to claim 1 or 2, wherein: the insulating film wrapping layer is formed by alternately wrapping two insulating films, and the wrapping directions of the two insulating films are opposite.
4. The double-glass-fiber copper-based alloy lapped wire according to claim 3, wherein: the wrapping angle of the insulating film in the insulating film wrapping layer is set to be 30-45 degrees.
5. The preparation method of the double-glass-fiber copper-based alloy lapped wire is characterized by comprising the following steps of: the method comprises the following steps:
s1 paying-off
Carrying out constant tension paying-off on the coiled wire;
s2 wire alignment and cleaning
Straightening and cleaning a metal wire: wherein, the alignment adopts a graduated scale; the cleaning device is a nylon wheel, copper ash brought out by the nylon wheel when the nylon wheel contacts the metal conducting wire is absorbed by a funnel-shaped dust collector below the cleaning device, and the surface of the conducting wire is ensured to be clean;
s3 insulation film wrapping
Coating sintering glue on one surface of the insulating film, enabling the surface to be tightly attached to a lead, and performing lapping, wherein the lapping overlapping rate is 50% -75%;
s4 anti-cracking glass fiber wrapping
The two glass fibers are used for wrapping the conducting wire passing through the S3 in a cross wrapping mode, and the wrapping angle is controlled to be 45-60 degrees;
s5 sintering
The lead in the S4 is sintered to form a sintering layer through an inductor of a high-frequency furnace;
s6 wrapping wire impregnating insulating paint
Passing the wire processed by the S5 through an insulating paint box filled with insulating paint;
s7 compact layer glass fiber lapping
The two glass fibers are used for wrapping the conducting wire passing through the S6 in a cross wrapping mode, and the wrapping angle is controlled to be smaller than 5 degrees;
s8 Cooling
The wire processed by the S7 passes through a cooling box filled with cooling water to cool the wire;
s9 line taking-up
And (4) taking up the cooled wire under constant tension.
6. The method for preparing the double-glass-fiber copper-based alloy lapped wire according to claim 5, wherein the method comprises the following steps: the scale of the graduated scale is 2-30 mm; the rotation speed of the nylon wheel is 100-1000 rpm.
7. The method for preparing the double-glass-fiber copper-based alloy lapped wire according to claim 5, wherein the method comprises the following steps: the tension in S1 and S9 is controlled within the range of 5-80N.
CN201911146976.9A 2019-11-21 2019-11-21 Double-glass-fiber copper-based alloy lapped wire and preparation method thereof Pending CN110828037A (en)

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Application Number Priority Date Filing Date Title
CN201911146976.9A CN110828037A (en) 2019-11-21 2019-11-21 Double-glass-fiber copper-based alloy lapped wire and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505541A (en) * 1982-03-31 1985-03-19 Sea-Log Corporation Rodent-resistant non-conductive optical fiber cable
JPH08249942A (en) * 1995-03-14 1996-09-27 Toshiba Corp Insulated conductor
US20020029896A1 (en) * 1998-04-06 2002-03-14 Kiyonori Yokoi Coaxial cables, multicore cables, and electronic apparatuses using such cables
CN201413707Y (en) * 2009-05-27 2010-02-24 苏州巨峰金属线缆有限公司 High-heat-conductivity double-glass-fiber copper flat wire
CN201413655Y (en) * 2009-05-27 2010-02-24 无锡环宇电磁线有限公司 Sintered film aluminum core transposed wire
CN201853516U (en) * 2010-11-02 2011-06-01 上海中马电磁线有限公司 Double-glass yarn copper-sheathed flat wire
CN102468001A (en) * 2010-11-16 2012-05-23 上海申茂电磁线有限公司 Double-glass-fiber covered enamelled copper flat wire and production process thereof
CN202495308U (en) * 2012-03-23 2012-10-17 上海友拓电磁线有限公司 Concentric tapered winding head
CN104934117A (en) * 2015-06-29 2015-09-23 深圳市沃尔核材股份有限公司 Aramid fiber lapped wire and production method thereof
CN205194364U (en) * 2015-11-25 2016-04-27 四川金瑞电工有限责任公司 Compound insulating anti -corona flat copper wire
EP3301687A1 (en) * 2016-09-29 2018-04-04 Lapp Engineering & Co. Cable and method for producing a cable
US20190009512A1 (en) * 2017-07-07 2019-01-10 Seiji Kagawa Electromagnetic wave absorption cable
CN109390085A (en) * 2018-11-13 2019-02-26 天津经纬辉开光电股份有限公司 Glass fiber packet F46 polyester-imide film sintering line and preparation method thereof
CN211125086U (en) * 2019-11-21 2020-07-28 安徽中威铜业有限公司 High breakdown voltage lapped wire
CN211125085U (en) * 2019-11-21 2020-07-28 安徽中威铜业有限公司 Double glass fiber copper-based alloy lapped wire

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505541A (en) * 1982-03-31 1985-03-19 Sea-Log Corporation Rodent-resistant non-conductive optical fiber cable
JPH08249942A (en) * 1995-03-14 1996-09-27 Toshiba Corp Insulated conductor
US20020029896A1 (en) * 1998-04-06 2002-03-14 Kiyonori Yokoi Coaxial cables, multicore cables, and electronic apparatuses using such cables
CN201413707Y (en) * 2009-05-27 2010-02-24 苏州巨峰金属线缆有限公司 High-heat-conductivity double-glass-fiber copper flat wire
CN201413655Y (en) * 2009-05-27 2010-02-24 无锡环宇电磁线有限公司 Sintered film aluminum core transposed wire
CN201853516U (en) * 2010-11-02 2011-06-01 上海中马电磁线有限公司 Double-glass yarn copper-sheathed flat wire
CN102468001A (en) * 2010-11-16 2012-05-23 上海申茂电磁线有限公司 Double-glass-fiber covered enamelled copper flat wire and production process thereof
CN202495308U (en) * 2012-03-23 2012-10-17 上海友拓电磁线有限公司 Concentric tapered winding head
CN104934117A (en) * 2015-06-29 2015-09-23 深圳市沃尔核材股份有限公司 Aramid fiber lapped wire and production method thereof
CN205194364U (en) * 2015-11-25 2016-04-27 四川金瑞电工有限责任公司 Compound insulating anti -corona flat copper wire
EP3301687A1 (en) * 2016-09-29 2018-04-04 Lapp Engineering & Co. Cable and method for producing a cable
US20190009512A1 (en) * 2017-07-07 2019-01-10 Seiji Kagawa Electromagnetic wave absorption cable
CN109390085A (en) * 2018-11-13 2019-02-26 天津经纬辉开光电股份有限公司 Glass fiber packet F46 polyester-imide film sintering line and preparation method thereof
CN211125086U (en) * 2019-11-21 2020-07-28 安徽中威铜业有限公司 High breakdown voltage lapped wire
CN211125085U (en) * 2019-11-21 2020-07-28 安徽中威铜业有限公司 Double glass fiber copper-based alloy lapped wire

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