CN114613553B - Insulated cable production method - Google Patents
Insulated cable production method Download PDFInfo
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- CN114613553B CN114613553B CN202210276470.5A CN202210276470A CN114613553B CN 114613553 B CN114613553 B CN 114613553B CN 202210276470 A CN202210276470 A CN 202210276470A CN 114613553 B CN114613553 B CN 114613553B
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- cable
- insulated cable
- extrusion
- cavity
- core
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Classifications
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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
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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
- H01B13/0036—Details
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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
- H01B13/148—Selection of the insulating material therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
Abstract
The invention provides a production method of an insulated cable, and belongs to the technical field of cables. The production steps are as follows: uniformly mixing 89-97% of injection molding outer coating material, 2-8% of mica sheets and 1-3% of binder, heating until the injection molding outer coating material is melted, and injecting melted viscous fluid into a feeding hopper above a rotary cylinder from the feeding hopper; the rotary drum is controlled to rotate at a constant speed, the cable core is controlled to feed in the guide core sleeve at a constant speed, the viscous fluid is cooled and molded outside the cable core corresponding to the cooling box, the cable or the wire coated with the insulating sleeve is formed, and the winding wheel is used for winding the cable or the wire. The produced cable has good insulating property and mechanical property.
Description
Technical Field
The invention belongs to the technical field of cables, and relates to a production method of an insulated cable.
Background
The insulating sleeve outside the conductive core of the cable is typically formed by extrusion coating, as in the prior art disclosed in CN202010791915.4, and then a mica tape or other insulating tape is coated outside the sleeve to provide the cable with certain insulating properties, which requires two steps, extrusion and wrapping.
The mechanical properties of the cable include tensile strength, bending strength, extrusion resistance and the like, and the cable outer coating sleeve formed by taking polyethylene, polyvinyl chloride and the like as main materials is relatively weak in the aspect of the mechanical properties, so that the mechanical properties of the cable are reinforced by a coating layer for coating armor and the like to improve the mechanical properties, which makes the production process of the cable complex and the production cost higher. Based on this, the applicant has proposed a new cable processing method capable of simplifying the process and improving the performance.
Disclosure of Invention
The invention aims to solve the problems existing in the prior art and provide a production method of an insulated cable, and aims to improve the insulation performance and mechanical performance of the cable.
The aim of the invention can be achieved by the following technical scheme: the method is characterized by relying on an insulated cable production device, wherein the insulated cable production device comprises a frame, an extrusion shell, a core guide sleeve and a cold setting box;
the extruder shell is fixed on the frame, a rotary cylinder is rotationally connected in the extruder shell, a hollow channel is arranged in the rotary cylinder, the hollow channel is provided with a hot melting cavity and a centrifugal cavity in sequence from top to bottom, the core guide sleeve is inserted in the hollow channel, and an extrusion screw is arranged outside the core guide sleeve in the hot melting cavity;
the middle part of the cold-setting box is provided with an extrusion die hole communicated with the lower end of the hollow channel, and the outer side of the extrusion die hole is provided with a cooling cavity positioned on the cold-setting box;
the guide core sleeve is fixedly connected with the frame, and the top of the rotary cylinder is provided with a feeding hopper; the paying-off wheel is rotatably connected to the rack and is positioned above the guide core sleeve; the frame is rotationally connected with a rolling wheel positioned below the cold-setting box;
the production steps are as follows: uniformly mixing 89-97% of injection molding outer coating material, 2-8% of mica sheets and 1-3% of binder, heating until the injection molding outer coating material is melted, and injecting melted viscous fluid into a feeding hopper above a rotary cylinder from the feeding hopper; the rotary drum is controlled to rotate at a constant speed, the cable core is controlled to feed in the guide core sleeve at a constant speed, the viscous fluid is cooled and molded outside the cable core corresponding to the cooling box, the cable or the wire coated with the insulating sleeve is formed, and the winding wheel is used for winding the cable or the wire.
Further, the hot melting cavity is cone-shaped, and a heater positioned at the outer side of the hot melting cavity is arranged between the rotary cylinder and the extrusion casing.
Further, the cooling box is provided with an air inlet connecting pipe positioned at the lower end of the cooling cavity and an air outlet connecting pipe positioned at the upper end of the cooling cavity, and the cooling cavity is internally provided with a spiral air guide sheet.
Further, a pressure limiting valve is arranged in the air outlet connecting pipe, a plurality of air exhaust small holes communicated with the cooling cavity and the extrusion die holes are formed in the cold setting box, the air exhaust small holes are circumferentially and uniformly distributed on the outer side of the extrusion die holes, and the air exhaust small holes are positioned in the middle of the cooling cavity.
The spiral air guide sheet can prolong the cooling path, cold air flow is sent out from bottom to top, the temperature of the position close to the tail end of the extrusion die hole is low, the curing of the rubber sleeve is facilitated, in addition, the pressure limiting valve is arranged at the air outlet connecting pipe, the cooling cavity is in a high-pressure state, the air pressure in the cooling cavity is controlled to be between 1.5 and 3 atmospheres, partial air can enter the extrusion die hole through the air exhaust small holes, and because the extrusion die hole is positioned in the middle of the cooling cavity, the gap between the rubber sleeve and the inner wall of the extrusion die hole is larger as the rubber sleeve is closer to the tail end of the extrusion die hole, the air entering the extrusion die hole from the air exhaust small holes can only run downwards and be discharged from the tail end of the extrusion die hole.
Further, a pressure limiting valve is arranged in the air outlet connecting pipe, an annular gap penetrating through the cooling cavity and the extrusion die hole is formed in the cold setting box, and the annular gap is located in the middle of the cooling cavity.
The purpose of setting up the annular breach is the same with the purpose of exhaust aperture, however, in contrast, the setting up of annular breach can make the pressure that atmospheric pressure acted on the gum cover more even.
Further, a first bevel gear ring is arranged at the top of the rotary cylinder, the insulated cable production equipment further comprises a motor, and a second bevel gear ring meshed with the first bevel gear ring is arranged on an output shaft of the motor.
The extrusion molding material and the mica sheet are mixed, the extrusion molding material and the mica sheet are input from a feeding hopper, after being heated by a heating cavity and extruded by an extrusion screw, the hot melt mixture enters a centrifugal cavity, and under the action of centrifugal force, the hot melt mixture is distributed in a state that the plane passes through a radial line, the mixture enters an extrusion die hole and is coated outside a cable core, and in the process, the mica sheet with a larger proportion still has the state that the plane passes through the radial line, so that the obtained cable has better mechanical property and insulating property.
The traditional cable strengthens the insulating property by wrapping the mica tape outside the thermoplastic layer, and in the scheme, because the radial line of the cable is perpendicular to the surface of the mica sheet, a plurality of layers of mica sheet insulating layers are formed in the cable sheath, and the mica sheets are mixed with colloid materials, the insulating property of the cable can be greatly improved.
Further, the injection molding outer coating material is a mixture of one or more of polyethylene, PA6 and polyvinyl chloride.
The injection molding outer coating material can also be other materials with thermoplastic cold setting characteristics as the consideration of different performance requirements of the cable.
Further, the thickness of the mica sheet is between 30 and 1000 mu m, the length-width ratio of the mica sheet is smaller than 2, and the ratio of the length to the thickness of the mica sheet is larger than 50.
And the high-pressure water is adopted to separate the mica sheets with corresponding sizes, the corresponding mica sheets are selected according to the requirements of the cable diameter and the coating layer thickness, and the requirements of the insulating property and the mechanical property of the cable are comprehensively considered in the selection of the mica sheets.
Drawings
Fig. 1 is a schematic view of the construction of the insulated cable production apparatus according to the first embodiment.
Fig. 2 is a schematic diagram of the construction of the insulated cable production apparatus according to the second embodiment.
Fig. 3 is an enlarged view of a portion a in fig. 1.
Fig. 4 is an enlarged view of a portion B in fig. 1.
Fig. 5 is an enlarged view of a portion C in fig. 2.
Fig. 6 is a cross-sectional view of the cable (twisted wire conductive core) after extrusion molding.
Fig. 7 is a cross-sectional view of the wire after extrusion molding.
In the figure, 1, an extrusion casing; 2. a core sleeve; 3. a cold setting box; 4. a rotary drum; 5. a hot melt chamber; 6. a centrifugal chamber; 7. extruding a screw; 8. extruding a die hole; 9. a cooling chamber; 10. feeding into a hopper; 11. an air inlet connecting pipe; 12. an air outlet connecting pipe; 13. an air guide sheet; 14. an exhaust aperture; 15. an annular gap; 16. a paying-off wheel; 17. a winding wheel; a. a rubber sleeve; b. a cable core; c. mica flakes.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example 1
The insulated cable production equipment shown in fig. 1, 3 and 4 is characterized by comprising a rack, an extrusion shell 1, a core sleeve 2 and a chill box 3; the extruder shell 1 is fixed on the frame, a rotary cylinder 4 is rotationally connected in the extruder shell 1, a hollow channel is arranged in the rotary cylinder 4, the hollow channel is sequentially provided with a hot melting cavity 5 and a centrifugal cavity 6 from top to bottom, a core guide sleeve 2 is inserted in the hollow channel, and an extrusion screw 7 is arranged outside the core guide sleeve 2 in the hot melting cavity 5; the middle part of the cold-setting box 3 is provided with an extrusion die hole 8 communicated with the lower end of the hollow channel, and the outer side of the extrusion die hole 8 is provided with a cooling cavity 9 positioned on the cold-setting box 3; the guide core sleeve 2 is fixedly connected with the frame, and the top of the rotary cylinder 4 is provided with a feeding hopper 10.
The hot melting cavity 5 is cone-shaped, and a heater positioned outside the hot melting cavity 5 is arranged between the rotary cylinder 4 and the extrusion casing 1.
The cooling box 3 is provided with an air inlet connecting pipe 11 positioned at the lower end of the cooling cavity 9 and an air outlet connecting pipe 12 positioned at the upper end of the cooling cavity 9, and the cooling cavity 9 is internally provided with a spiral air guide sheet 13.
A pressure limiting valve is arranged in the air outlet connecting pipe 12, a plurality of air outlet small holes 14 which are communicated with the cooling cavity 9 and the extrusion die hole 8 are formed in the cold setting box 3, the air outlet small holes 14 are circumferentially and uniformly distributed on the outer side of the extrusion die hole 8, and the air outlet small holes 14 are positioned in the middle of the cooling cavity 9.
The spiral air guide piece 13 can prolong the cooling path, cold air flow is sent out from bottom to top, the temperature of the position close to the tail end of the extrusion die hole 8 is low, solidification of the rubber sleeve a is facilitated, in addition, the air outlet connecting pipe 12 is provided with a pressure limiting valve, the inside of the cooling cavity 9 is in a high-pressure state, the air pressure in the cooling cavity 9 is controlled to be between 1.5 and 3 atmospheres, partial air can enter the extrusion die hole 8 through the air outlet small holes 14, the rubber sleeve a is positioned in the middle of the cooling cavity 9, the closer to the tail end of the extrusion die hole 8 is, the larger the gap between the rubber sleeve a and the inner wall of the extrusion die hole 8 is, the air entering the extrusion die hole 8 from the air outlet small holes 14 can only run downwards and be discharged from the tail end of the extrusion die hole 8, the setting can effectively bring out diluent in the adhesive, the rubber sleeve a is convenient to solidify and form, the external pressure can be applied to the rubber sleeve a outside the rubber sleeve a which is not solidified, the external pressure can be relatively uniformly acted on the outer side of the rubber sleeve a, and the shape of the rubber sleeve a is maintained, and the strength of a cable core b is positively increased.
The top of the rotary cylinder 4 is provided with a first bevel gear ring, the insulated cable production equipment also comprises a motor, and the output shaft of the motor is provided with a second bevel gear ring meshed with the first bevel gear ring.
A paying-off wheel 16 positioned above the guide core sleeve 2 is rotatably connected to the frame.
A rolling wheel 17 positioned below the cold-setting box 3 is rotatably connected on the frame.
The extrusion molding material and the mica sheet c are mixed, the extrusion molding material and the mica sheet c are input from the feeding hopper 10, after being heated by the heating cavity and extruded by the extrusion screw 7, the hot melt mixture enters the centrifugal cavity 6, and in the centrifugal cavity 6, the hot melt mixture is subjected to centrifugal force, the mica sheet c is distributed in a state that the plane passes through the radial line, the mixture enters the extrusion die hole 8 and is coated outside the cable core b, and in the process, the mica sheet c still has a state that the plane passes through the radial line, so that the obtained cable has better mechanical property and insulating property.
In the scheme, because the radial line of the cable is perpendicular to the surface of the mica sheet c, a multilayer mica sheet c insulating layer is formed in the cable jacket, and the mica sheets c are mixed with colloid materials, the insulating performance of the cable can be greatly improved.
Example two
As shown in fig. 2 and 5, the content of this embodiment is substantially the same as that of the first embodiment, except that: a pressure limiting valve is arranged in the air outlet connecting pipe 12, an annular gap 15 penetrating the cooling cavity 9 and the extrusion die hole 8 is arranged on the cold solidification box 3, and the annular gap 15 is positioned in the middle of the cooling cavity 9.
The purpose of the annular gap 15 is the same as that of the vent hole 14, but in contrast, the annular gap 15 can make the pressure of the air pressure acting on the gum cover a more uniform.
The production method of the insulated cable comprises the following steps: uniformly mixing 89-97% of injection molding outer coating material, 2-8% of mica sheet c and 1-3% of binder, heating until the injection molding outer coating material is melted, and injecting the melted viscous fluid into the feeding hopper 10 above the rotary cylinder 4 from the feeding hopper 10; the rotary drum 4 is controlled to rotate at a constant speed, the cable core b is controlled to feed in the core guiding sleeve 2 at a constant speed, the viscous fluid is cooled and molded outside the cable core b corresponding to the cooling box, the cable or the wire coated with the insulating sleeve is formed, and the winding wheel 17 completes winding of the cable or the wire.
There are cases where it is necessary to polish the outer surface of the cable to eliminate the possible mica flakes c burrs.
The injection molding outer coating material is one or a mixture of more of polyethylene, PA6 and polyvinyl chloride. The injection molding outer coating material can also be other materials with thermoplastic cold setting characteristics as the consideration of different performance requirements of the cable.
The thickness of the mica sheet c is between 30 and 1000 mu m, the length-width ratio of the mica sheet c is smaller than 2, and the ratio of the length to the thickness of the mica sheet c is larger than 50.
And the high-pressure water is adopted to separate the mica sheets c with corresponding sizes, the corresponding mica sheets c are selected according to the diameter of the cable and the thickness of the coating layer, and the selection of the mica sheets c should comprehensively consider the requirements on the insulation performance and the mechanical performance of the cable.
The present apparatus and method can be used to make cables, as shown in fig. 6, and also to make wires, as shown in fig. 7, which can be used for cable cores.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The insulated cable production method is characterized by being completed by an insulated cable production device, wherein the insulated cable production device comprises a rack, an extrusion shell (1), a core sleeve (2) and a cold-setting box (3);
the extrusion machine is characterized in that the extrusion machine shell (1) is fixed on a machine frame, a rotary drum (4) is rotationally connected to the extrusion machine shell (1), a hollow channel is formed in the rotary drum (4), a hot melting cavity (5) and a centrifugal cavity (6) are sequentially formed in the hollow channel from top to bottom, a core guide sleeve (2) is inserted into the hollow channel, and an extrusion screw (7) is arranged outside the core guide sleeve (2) in the hot melting cavity (5);
the middle part of the cold solidification box (3) is provided with an extrusion die hole (8) communicated with the lower end of the hollow channel, and a cooling cavity (9) positioned on the cold solidification box (3) is arranged outside the extrusion die hole (8);
the guide core sleeve (2) is fixedly connected with the frame, and the top of the rotary cylinder (4) is provided with a feeding hopper (10); a paying-off wheel (16) positioned above the guide core sleeve (2) is rotationally connected to the frame; a rolling wheel (17) positioned below the cold-setting box (3) is rotationally connected to the frame;
the production method comprises the following steps: uniformly mixing an injection molding outer coating material with the mass ratio of 89-97%, mica sheets (c) with the mass ratio of 2-8% and a binder with the mass ratio of 1-3%, heating until the injection molding outer coating material is melted, and injecting the melted viscous fluid into a feeding hopper (10) above a rotary drum (4) from the feeding hopper (10); the rotary drum (4) is controlled to rotate at a constant speed, the cable core (b) is controlled to feed in the conductive core sleeve (2) at a constant speed, the viscous fluid is cooled and molded outside the cable core (b) corresponding to the cooling box, a cable or an electric wire coated with the insulating sleeve is formed, and the winding wheel (17) is used for winding the cable or the electric wire.
2. The insulated cable production method according to claim 1, wherein the hot melting cavity (5) is cone-shaped, and a heater positioned outside the hot melting cavity (5) is arranged between the rotating cylinder (4) and the extrusion casing (1).
3. The method for producing the insulated cable according to claim 1, wherein the cold-setting box (3) is provided with an air inlet connecting pipe (11) positioned at the lower end of the cooling cavity (9) and an air outlet connecting pipe (12) positioned at the upper end of the cooling cavity (9), and the cooling cavity (9) is internally provided with a spiral air guide sheet (13).
4. A method for producing an insulated cable according to claim 3, wherein a pressure limiting valve is arranged in the air outlet connecting pipe (12), a plurality of air outlet small holes (14) which are communicated with the cooling cavity (9) and the extrusion die hole (8) are formed in the cold-setting box (3), the air outlet small holes (14) are circumferentially and uniformly distributed on the outer side of the extrusion die hole (8), and the air outlet small holes (14) are positioned in the middle of the cooling cavity (9).
5. A method for producing an insulated cable according to claim 3, wherein a pressure limiting valve is arranged in the air outlet connecting pipe (12), an annular gap (15) penetrating the cooling cavity (9) and the extrusion die hole (8) is arranged on the cold-setting box (3), and the annular gap (15) is positioned in the middle of the cooling cavity (9).
6. The method according to any of claims 1 to 5, wherein the top of the rotary drum (4) is provided with a first bevel gear ring, and the insulated cable production equipment further comprises a motor, and the output shaft of the motor is provided with a second bevel gear ring meshed with the first bevel gear ring.
7. A method of producing an insulated cable according to any of claims 1 to 5, wherein the injection-molded outer covering material is a mixture of one or more of polyethylene, PA6, polyvinyl chloride.
8. A method of producing an insulated cable according to any of claims 1 to 5, wherein the thickness of the mica sheet (c) is between 30 and 1000 μm, the aspect ratio of the mica sheet (c) is less than 2, and the ratio of the length to the thickness of the mica sheet (c) is greater than 50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210276470.5A CN114613553B (en) | 2022-03-21 | 2022-03-21 | Insulated cable production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210276470.5A CN114613553B (en) | 2022-03-21 | 2022-03-21 | Insulated cable production method |
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| Publication Number | Publication Date |
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| CN114613553A CN114613553A (en) | 2022-06-10 |
| CN114613553B true CN114613553B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210276470.5A Active CN114613553B (en) | 2022-03-21 | 2022-03-21 | Insulated cable production method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005340031A (en) * | 2004-05-27 | 2005-12-08 | Yazaki Corp | Electric cable and manufacturing method of the same |
| CA2857698A1 (en) * | 2011-12-02 | 2013-06-06 | Leoni Kabel Holding Gmbh | Method for producing a cable core, having a conductor surrounded by an insulation, for a cable, in particular for an induction cable, and cable core and cable |
| WO2018087581A1 (en) * | 2016-11-11 | 2018-05-17 | Prysmian S.P.A. | Process for jointing cables, apparatus for performing such a process and thermoplastic joint so manufactured |
| CN109065252A (en) * | 2018-08-03 | 2018-12-21 | 苏州三体智能科技有限公司 | Cable and its production method |
| CN214557005U (en) * | 2021-04-06 | 2021-11-02 | 湖北艾克电缆有限公司 | Mineral cable production and processing equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10297372B2 (en) * | 2012-05-18 | 2019-05-21 | Prysmian S.P.A | Process for producing an energy cable having a thermoplastic electrically insulating layer |
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2022
- 2022-03-21 CN CN202210276470.5A patent/CN114613553B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005340031A (en) * | 2004-05-27 | 2005-12-08 | Yazaki Corp | Electric cable and manufacturing method of the same |
| CA2857698A1 (en) * | 2011-12-02 | 2013-06-06 | Leoni Kabel Holding Gmbh | Method for producing a cable core, having a conductor surrounded by an insulation, for a cable, in particular for an induction cable, and cable core and cable |
| WO2018087581A1 (en) * | 2016-11-11 | 2018-05-17 | Prysmian S.P.A. | Process for jointing cables, apparatus for performing such a process and thermoplastic joint so manufactured |
| CN109065252A (en) * | 2018-08-03 | 2018-12-21 | 苏州三体智能科技有限公司 | Cable and its production method |
| CN214557005U (en) * | 2021-04-06 | 2021-11-02 | 湖北艾克电缆有限公司 | Mineral cable production and processing equipment |
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| CN114613553A (en) | 2022-06-10 |
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