CN111755172A - Manufacturing method of coaxial cable - Google Patents
Manufacturing method of coaxial cable Download PDFInfo
- Publication number
- CN111755172A CN111755172A CN202010471879.3A CN202010471879A CN111755172A CN 111755172 A CN111755172 A CN 111755172A CN 202010471879 A CN202010471879 A CN 202010471879A CN 111755172 A CN111755172 A CN 111755172A
- Authority
- CN
- China
- Prior art keywords
- plastic
- metal
- layer
- coaxial cable
- extruder
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
- H01B13/0162—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables of the central conductor
-
- 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
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1808—Construction of the conductors
-
- 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
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1878—Special measures in order to improve the flexibility
-
- 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
- H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
- H01B13/0165—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables of the layers outside the outer conductor
-
- 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
- H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
- H01B13/0167—After-treatment
-
- 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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
- H01B13/2626—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping of a coaxial cable outer conductor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Electric Cables (AREA)
- Communication Cables (AREA)
Abstract
A method of manufacturing a coaxial cable, comprising: preparing a metal plastic-bonded layer material; continuously manufacturing a soft inner conductor on line; the inner conductor and the coaxial cable core of the insulator are continuously manufactured on line by adopting a temperature control-medium-pressure nitrogen physical foaming-continuous single-layer extrusion-continuous double-layer co-extrusion-layer-by-layer covering method, and medium-pressure nitrogen physical high foaming is adopted, and the plasticization of the first metal plastic-bonded layer and the second metal plastic-bonded layer and the medium-pressure nitrogen physical high foaming of the foamed polyethylene medium layer are not influenced and interfered with each other, so that continuous generation, coaxial coating and bonding are realized; and continuously manufacturing the coaxial cable cores of the inner conductor, the insulator and the outer conductor on line, continuously extruding the third metal plastic-bonded layer on line, and continuously extruding the sheath on line, thereby manufacturing a finished product. The coaxial cable manufactured by the invention has three metal plastic-bonded layers without embossing, and has the advantages of good sealing performance, high electrical performance, good elastic deformation performance, low production cost and crease-resistance function.
Description
Technical Field
The invention relates to a manufacturing method of a cable, in particular to a manufacturing method of a coaxial cable.
Background
The information platform is the foundation of each field, so in the age of developing knowledge economy, high speed, broadband and digital are the elements of the information platform, the information platform is formed by combining a wired network and a wireless network, and the transmission media of images and digital are realized by air, optical fibers and coaxial cables. Therefore, the coaxial cable also plays an important role in the modern highly scientific and developed era.
In modern radio frequency signal transmission and radio frequency power feed technology practice, coaxial cables are the primary transmission and feed carriers. In the field of wireless communications, coaxial cables are used primarily to feed radio frequency power signals to antennas.
In order to adapt to long-term outdoor work, the coaxial cable is required to have good sealing property; in order to transmit the radio frequency power signal to the antenna to the maximum extent, the transmission loss of the coaxial cable is required to be low; since the coaxial cable is often required to be bent during installation, the coaxial cable is required to have good flexibility so that the electrical performance of the coaxial cable is not affected by the bending of the coaxial cable. In order to make the coaxial cable have good sealing performance and low transmission loss, the coaxial cable usually adopts a metal tube as an outer conductor, and under a general condition, a smooth tubular metal outer conductor can generate wrinkles when being bent, so that the performance of the coaxial cable is deteriorated, and sometimes the coaxial cable is even damaged; therefore, the tubular metal outer conductor of the coaxial cable is usually embossed to provide the coaxial cable with good flexibility, but the embossing process requires a very high performance device, and the material consumption of the tubular metal outer conductor is relatively large during embossing, which results in a high production cost.
To save raw materials and production costs, coaxial cables have used smooth tubular metal outer conductors, which has been a necessary trend. In order to solve the problem that the coaxial cable does not need to be embossed on the tubular metal outer conductor, meanwhile, the coaxial cable has good flexibility and sealing performance, the coaxial cable is easier to bend and is not damaged, and the coaxial cable keeps good transmission electrical performance, the coaxial cable developed by the applicant completely meets the requirements.
As shown in fig. 1, the coaxial cable developed by the applicant comprises a flexible inner conductor 1, a foamed polyethylene dielectric layer 2, a smooth tubular metal outer conductor 3, a sheath 4, a first metal plastic-bonded layer 12, a second metal plastic-bonded layer 23 and a third metal plastic-bonded layer 34, wherein the foamed polyethylene dielectric layer 2 is coaxially coated and bonded on the flexible inner conductor 1 through the first metal plastic-bonded layer 12, the smooth tubular metal outer conductor 3 is coaxially coated and bonded on the foamed polyethylene dielectric layer 2 through the second metal plastic-bonded layer 23, and the sheath 4 is coaxially coated and bonded on the smooth tubular metal outer conductor 3 through the third metal plastic-bonded layer 34.
According to the coaxial cable developed by the applicant, the three metal plastic-bonded layers 12, 23 and 34 are used for bonding metal and plastic, so that the smooth tubular metal outer conductor 3 can be manufactured by adopting a thin metal strip, and the raw materials and the production cost are saved; meanwhile, the coaxial cable has excellent elastic deformation performance without embossing on the smooth tubular metal outer conductor 3 due to the adoption of the flexible inner conductor 1 and the thinner smooth tubular metal outer conductor 3, so that the coaxial cable developed by the applicant is flexible and has good bending performance, thereby being convenient for the installation of the coaxial cable; and because there is no influence of embossing process on the consistency performance of the coaxial cable, the electrical performance of the coaxial cable is superior to that of the embossed cable, and the smooth tubular metal outer conductor 3 has lower structural reflection than that of the embossed outer conductor, thereby being beneficial to improving the electrical performance of the coaxial cable.
Therefore, the manufacturing method of the coaxial cable with three metal plastic-bonded layers without embossing is designed, so that the coaxial cable with good sealing performance, high electrical performance, good elastic deformation performance and low production cost is manufactured, and the technical problem which needs to be solved at present is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for manufacturing a coaxial cable with three metal plastic-bonded layers without embossing, so that the coaxial cable with good sealing performance, high electrical performance, good elastic deformation performance and low production cost is manufactured. In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method of manufacturing a coaxial cable, comprising:
preparing a metal plastic-bonded layer material: the preparation proportion is 1: (0.08-0.25) mixing polyethylene and a metal plastic adhesive to prepare a metal plastic adhesive layer material;
continuously manufacturing the flexible inner conductor on line: adopting soft metal as a soft inner conductor, and carrying out wire drawing, continuous annealing and online preheating on the soft inner conductor, wherein the online preheating temperature is between 80 and 90 ℃;
continuously manufacturing the inner conductor and the coaxial cable core of the insulator on line by adopting a temperature control-medium-pressure nitrogen physical foaming-continuous single-layer extrusion-continuous double-layer co-extrusion-layer-by-layer covering method:
arranging a first plastic extruder in the conveying direction of the flexible inner conductor, wherein the first plastic extruder is connected with a physical foaming extruder and a second plastic extruder on line respectively, and the physical foaming extruder and the second plastic extruder are connected with a co-extruder head;
the body temperature of the first plastic extruder is ranged from 180 ℃ to 210 ℃, the head temperature is ranged from 190 ℃ to 220 ℃, the body temperature of the physical foaming extruder is ranged from 180 ℃ to 220 ℃, the body temperature of the second plastic extruder is ranged from 170 ℃ to 220 ℃, and the temperature of the co-extrusion head is ranged from 190 ℃ to 230 ℃;
injecting medium-pressure nitrogen with 35-40 atmospheric pressures into a charging barrel of the physical foaming extruder, wherein the medium-pressure nitrogen enables foamed polyethylene in the charging barrel to be physically foamed;
enabling the flexible inner conductor after online preheating to continuously enter a first plastic extruder, acquiring online speed information by adopting an encoder, and controlling continuous single-layer extrusion setting of the first plastic extruder and continuous double-layer co-extrusion setting of a physical foaming extruder and a second plastic extruder, wherein the given linear speed is between 10m/min and 40 m/min;
continuously extruding a first metal plastic-bonded layer with the thickness of 0.1-0.4 mm by a first plastic extruder from the metal plastic-bonded layer material, and coaxially coating the first metal plastic-bonded layer on the continuously generated flexible inner conductor;
after the foamed polyethylene material is physically foamed by a physical foaming extruder, after the metal plastic-bonded layer material passes through a second plastic extruder, a co-extruder head continuously and double-layer co-extrudes a foamed polyethylene medium layer, namely an insulator and a second metal plastic-bonded layer with the thickness of 0.1-0.4 mm, the foamed polyethylene medium layer is coaxially coated and bonded on the continuously generated flexible inner conductor through the first metal plastic-bonded layer, and the second metal plastic-bonded layer is coaxially coated on the continuously generated foamed polyethylene medium layer, so that a coaxial cable core of the inner conductor and the insulator is manufactured;
and continuously manufacturing the inner conductor, the insulator and the outer conductor coaxial cable core on line: processing a metal band by a metal band forming device, enabling the metal band to be coaxially wound on the inner conductor and the insulator coaxial cable core, welding lap seams of the metal band to form a smooth tubular metal outer conductor, and enabling the smooth tubular metal outer conductor to be coaxially coated and bonded on a continuously generated foamed polyethylene medium layer through a second metal plastic-bonded layer, so as to manufacture the inner conductor, the insulator and the outer conductor coaxial cable core;
and continuously extruding a third metal plastic-bonded layer on line: a third plastic extruder is arranged in the conveying direction of the inner conductor, the insulator and the outer conductor coaxial cable core, the metal plastic-bonded layer material is continuously extruded into a third metal plastic-bonded layer through the third plastic extruder, and the third metal plastic-bonded layer coaxially wraps the continuously generated inner conductor, insulator and outer conductor coaxial cable core;
on-line continuous extrusion of the sheath: and arranging a fourth plastic extruder in the output direction of the third plastic extruder, continuously extruding a sheath from the polyethylene or the low-smoke halogen-free flame-retardant material on line by the fourth plastic extruder, coaxially coating the sheath by a third metal plastic-bonded layer, and bonding the sheath on the continuously generated inner conductor, insulator and outer conductor coaxial cable core, thereby manufacturing a finished product.
The prepared metal plastic-bonded layer material has low attenuation and high adhesion, so the electrical performance of the coaxial cable cannot be influenced by the composition of the metal plastic-bonded layer material; the metal plastic-bonded layer material, metal and plastic have co-fusion bonding property and can be plasticized, so that the foamed polyethylene dielectric layer still keeps the common property and molten fluidity with the plastic at the temperature of more than 250 ℃, and continuous generation, coaxial coating and bonding are realized;
because the charging barrel of the physical foaming extruder is filled with medium-pressure nitrogen with 35-40 atmospheric pressures, the foamed polyethylene material is fully and uniformly stirred with the medium-pressure nitrogen in the charging barrel with larger shaft-diameter ratio in the screw propelling process, and medium-pressure nitrogen physical high foaming is generated and medium-pressure extrusion foaming potential energy is formed, so that a foamed polyethylene medium layer with proper pressure is extruded;
because the foamed polyethylene medium layer adopts medium-pressure nitrogen physical high foaming, the first metal plastic-bonded layer and the second metal plastic-bonded layer do not generate physical foaming, the first metal plastic-bonded layer and the second metal plastic-bonded layer are plasticized, the medium-pressure nitrogen physical high foaming foamed polyethylene medium layer is coaxially coated and bonded on the continuously generated flexible inner conductor, and the metal plastic-bonded layer is adhered and fixed in an extruding way, the invention ensures that the plasticization of the first metal plastic-bonded layer and the second metal plastic-bonded layer and the medium-pressure nitrogen physical high foaming of the foamed polyethylene medium layer do not influence each other and interfere with each other by controlling the thickness, the time, the temperature and the like of the first metal plastic-bonded layer and the second metal plastic-bonded layer, thereby realizing the major breakthrough in the technology;
the sheath is coaxially coated and bonded on the continuously generated inner conductor, insulator and outer conductor coaxial cable core through the third metal plastic-bonded layer, so that the sheath and the smooth tubular metal outer conductor are bonded into a whole, and therefore, when the coaxial cable is straightened after being bent, the sheath and the smooth tubular metal outer conductor are bonded into a whole, so that the coaxial cable does not generate wrinkles under the combined action of the self restoring force of the smooth tubular metal outer conductor and the elastic restoring force of the sheath, and therefore, the coaxial cable has the anti-wrinkling function and does not generate wrinkles when the coaxial cable is straightened after being bent for many times.
The invention adopts the following improved technical scheme:
the lap seam welding of strap adopts argon arc welding to alternating current sawtooth wave that welds with argon arc changes into the rule type wave, according to the thickness of strap, through the rule type wave band, controls the standing wave time of peak value, valley value, thereby the lap seam welding temperature of control strap.
The smooth tubular metal outer conductor adopts a thinner metal belt which can be stably welded to increase the flexibility of the cable, and the metal belt adopted by the smooth tubular metal outer conductor has the tensile rate of 30-35% generally, so that after the smooth tubular metal outer conductor is welded into a tubular shape by general argon arc, the flexibility of the smooth tubular metal outer conductor is reduced under the action of the welding temperature, and the brittleness of the smooth tubular metal outer conductor is increased, so that the coaxial cable can not meet the technical index requirement, therefore, the alternating current sawtooth wave of argon arc welding is changed into a regular wave, and the standing wave time of the peak value and the valley value is controlled through the regular wave band according to the thickness of the metal belt, so that the lap seam welding temperature of the metal belt is controlled, and the technical problem that the brittleness of the smooth tubular metal outer conductor is increased due to high temperature is avoided;
after a test that the coaxial cable is folded destructively and repeatedly bent to be broken, the broken part of the coaxial cable is not at the folded part of a welding trace but on a metal belt without welding, so that the welding wave mode is fully changed, the peak value, the valley value and the standing wave time are controlled by adopting the gauge wave, namely the frequency of the gauge wave is changed, a good welding effect can be realized, and the flexibility of the cable is increased.
As a further improved technical scheme of the invention:
and a clinging drawing die is arranged in the output direction of the fourth plastic extruder, and the sheath is clung to the smooth tubular metal outer conductor into a whole through a third metal plastic-sticking layer by clinging to the drawing die.
Because the close-fitting drawing die is arranged in the output direction of the fourth plastic extruder, the sheath is tightly adhered to the smooth tubular metal outer conductor into a whole through the third metal plastic-adhesive layer by the close-fitting drawing die, so that the sheath is tightly adhered to the smooth tubular metal outer conductor into a whole, and when the coaxial cable is straightened after being bent, the sheath and the smooth tubular metal outer conductor are tightly adhered into a whole, so that the coaxial cable can not generate wrinkles under the combined action of the self restoring force of the smooth tubular metal outer conductor and the elastic restoring force of the sheath, and the crease-resistant function is further enhanced.
The preferable technical scheme of the soft inner conductor in the invention is as follows:
the soft inner conductor is made of a soft round copper wire, a soft copper-clad aluminum wire or a soft copper pipe.
As the preferable scheme of the foamed polyethylene medium layer and the second metal plastic-bonded layer in the invention:
the diameters of the foamed polyethylene medium layer and the second metal plastic-bonded layer are preferably between 8mm and 22 mm.
The diameters of the foamed polyethylene medium layer and the second metal plastic-bonded layer are 8-22 mm, the eccentricity is controlled within 8%, and the water immersion capacitance values of the foamed polyethylene medium layer and the second metal plastic-bonded layer are controlled within 75 pf/m-76 pf/m.
As a preferred technical scheme of the smooth tubular metal outer conductor in the invention:
the thickness of the tube wall of the smooth tubular metal outer conductor, i.e. the thickness of the metal strip, is preferably between 0.1mm and 0.58 mm.
As a preferable embodiment of the metal strip of the present invention:
the metal belt is made of aluminum belt, and the thickness of the aluminum belt is preferably 0.30 mm-0.58 mm.
As another preferable embodiment of the metal strip of the present invention:
the metal belt is a copper belt, and the thickness of the copper belt is preferably 0.10 mm-0.35 mm.
The thickness of the aluminum strip is preferably between 0.30mm and 0.58mm, the thickness of the copper strip is preferably between 0.10mm and 0.35mm, and the thinnest metal strip capable of being stably welded is adopted in principle, so that the flexibility of the feeder line is increased, and the material cost is reduced.
The preferable technical proposal of the third metal plastic-bonded layer in the invention is as follows:
the thickness of the third metal plastic-bonded layer is preferably between 0.09mm and 0.12 mm.
When the third metal plastic-bonded layer is used for bonding, the influence of the adhesive on the electrical performance of the feeder line is not needed to be considered, so the selection range of the material and the thickness of the third metal plastic-bonded layer is wider, and the third metal plastic-bonded layer can be replaced by the adhesive layer formed by the common adhesive.
The preferred technical scheme of the sheath in the invention is as follows:
the thickness of the sheath is preferably between 0.8mm and 1.1 mm.
The invention has the beneficial effects that:
the prepared metal plastic-bonded layer material has low attenuation and high adhesion, so the electrical performance of the coaxial cable cannot be influenced by the composition of the metal plastic-bonded layer material; the metal plastic-bonded layer material, metal and plastic have co-fusion bonding property and can be plasticized, so that the foamed polyethylene dielectric layer still keeps the common property and molten fluidity with the plastic at the temperature of more than 250 ℃, and continuous generation, coaxial coating and bonding are realized;
because the charging barrel of the physical foaming extruder is filled with medium-pressure nitrogen with 35-40 atmospheric pressures, the foamed polyethylene material is fully and uniformly stirred with the medium-pressure nitrogen in the charging barrel with larger shaft-diameter ratio in the screw propelling process, and medium-pressure nitrogen physical high foaming is generated and medium-pressure extrusion foaming potential energy is formed, so that a foamed polyethylene medium layer with proper pressure is extruded;
because the foamed polyethylene medium layer adopts medium-pressure nitrogen physical high foaming, the first metal plastic-bonded layer and the second metal plastic-bonded layer do not generate physical foaming, the first metal plastic-bonded layer and the second metal plastic-bonded layer are plasticized, the medium-pressure nitrogen physical high foaming foamed polyethylene medium layer is coaxially coated and bonded on the continuously generated flexible inner conductor, and the metal plastic-bonded layer is adhered and fixed in an extruding way, the invention ensures that the plasticization of the first metal plastic-bonded layer and the second metal plastic-bonded layer and the medium-pressure nitrogen physical high foaming of the foamed polyethylene medium layer do not influence each other and interfere with each other by controlling the thickness, the time, the temperature and the like of the first metal plastic-bonded layer and the second metal plastic-bonded layer, thereby realizing the major breakthrough in the technology;
the sheath is coaxially coated and bonded on the continuously generated inner conductor, insulator and outer conductor coaxial cable core through the third metal plastic-bonded layer, so that the sheath and the smooth tubular metal outer conductor are bonded into a whole, and therefore, when the coaxial cable is straightened after being bent, the sheath and the smooth tubular metal outer conductor are bonded into a whole, so that the coaxial cable does not generate wrinkles under the combined action of the self restoring force of the smooth tubular metal outer conductor and the elastic restoring force of the sheath, and therefore, the coaxial cable has the anti-wrinkling function and does not generate wrinkles when the coaxial cable is straightened after being bent for many times.
In conclusion, the coaxial cable manufactured by the invention has three metal plastic-bonded layers without embossing, and has the advantages of good sealing performance, high electrical performance, good elastic deformation performance and low production cost.
The invention is further described with reference to the following figures and detailed description.
Drawings
Fig. 1 is a schematic view of a radial cross-sectional structure of a coaxial cable developed by the present applicant;
fig. 2 is a flow chart of a preferred embodiment of the present invention.
Detailed Description
As shown in fig. 1 and 2, the method for manufacturing a coaxial cable in the preferred embodiment includes:
preparing a metal plastic-bonded layer material 10: the preparation proportion is 1: (0.08-0.25) mixing polyethylene and a metal plastic adhesive to prepare a metal plastic adhesive layer material 10;
continuously manufacturing the flexible inner conductor 1 on line: soft metal is adopted as a soft inner conductor 1, the soft inner conductor 1 can adopt a soft round copper wire, a soft copper-clad aluminum wire or a soft copper pipe, the diameter of the soft inner conductor 1 is between 3.15mm and 9mm, the soft inner conductor 1 is subjected to wire drawing, continuous annealing and online preheating, the online preheating temperature is between 80 ℃ and 90 ℃, and an inductive heating device or a resistance heating device is adopted for heating;
the inner conductor and the insulator coaxial cable core 102 are continuously manufactured on line by adopting a temperature control-medium pressure nitrogen physical foaming-continuous single-layer extrusion-continuous double-layer co-extrusion-layer-by-layer covering method:
a first plastic extruder 01 is arranged in the conveying direction of the flexible inner conductor 1, the first plastic extruder 01 is connected with a physical foaming extruder 011 and a second plastic extruder 02 on line respectively, and the physical foaming extruder 011 and the second plastic extruder 02 are connected with a co-extruder head 012;
the body temperature of the first plastic extruder 01 is ranged from 180 ℃ to 210 ℃, the head temperature is ranged from 190 ℃ to 220 ℃, the body temperature of the physical foaming extruder 011 is ranged from 180 ℃ to 220 ℃, the body temperature of the second plastic extruder 02 is ranged from 170 ℃ to 220 ℃, and the temperature of the co-extruder head 012 is ranged from 190 ℃ to 230 ℃;
injecting medium-pressure nitrogen with 35-40 atmospheric pressures into a charging barrel of the physical foaming extruder 011, wherein the medium-pressure nitrogen enables the foamed polyethylene material 001 in the charging barrel to be physically foamed;
enabling the flexible inner conductor 1 after online preheating to continuously enter a first plastic extruder 01, acquiring online speed information by adopting an encoder, and controlling continuous single-layer extrusion setting of the first plastic extruder 01, continuous double-layer co-extrusion setting of a physical foaming extruder 011 and a second plastic extruder 02, wherein the given linear speed is between 10m/min and 40 m/min;
continuously extruding a first metal plastic-bonded layer 12 with the thickness of 0.1-0.4 mm by a first plastic extruder 01 by using the metal plastic-bonded layer material 10, wherein the continuously generated flexible inner conductor 1 is coaxially coated with the first metal plastic-bonded layer 12;
after the foamed polyethylene material 001 is physically foamed by a physical foaming extruder 011, after the metal sticky plastic layer material 10 passes a second plastic extruder 02, a co-extruder head 012 co-extrudes a foamed polyethylene medium layer 2, namely an insulator and a second metal sticky plastic layer 23 with the thickness of 0.1 mm-0.4 mm, the foamed polyethylene medium layer 2 is coaxially coated and bonded on a continuously generated flexible inner conductor 1 through a first metal sticky plastic layer 12, and the second metal sticky plastic layer 23 is coaxially coated on the continuously generated foamed polyethylene medium layer 2, so that the inner conductor and insulator coaxial cable core 102 is manufactured;
the diameters of the foamed polyethylene medium layer 2 and the second metal plastic-bonded layer 23 are preferably between 8mm and 22mm, the eccentricity is controlled within 8 percent, and the water immersion capacitance values of the foamed polyethylene medium layer 2 and the second metal plastic-bonded layer 23 are controlled between 75pf/m and 76 pf/m;
continuously manufacturing the inner conductor, the insulator and the outer conductor coaxial cable core 123 on line: processing a metal strip 30 by a metal strip forming device 300, enabling the metal strip 30 to be coaxially wound on the inner conductor and insulator coaxial cable core 102, welding lap joints of the metal strip 30 to form a smooth tubular metal outer conductor 3, and enabling the smooth tubular metal outer conductor 3 to be coaxially coated and bonded on a continuously generated foamed polyethylene medium layer 2 through a second metal plastic-bonded layer 23, so as to manufacture an inner conductor, an insulator and an outer conductor coaxial cable core 123;
the metal belt forming device 300 comprises a metal belt mechanical trimming mechanism, a horn-shaped pipe pressing die, a tubular drawing forming die and an argon arc welding machine;
the processing of the metal strip 30 by the metal strip forming device 300 comprises metal strip edge cutting, metal strip bilateral arc pressing and drawing, metal strip entering a trumpet-shaped mould pressing pipe for drawing, drawing and pressing into a pipe shape, and metal strip lap seam welding; the temperature generated during the welding is favorable for the rapid bonding of the second metal plastic-bonded layer 23;
the thickness of the tube wall of the smooth tubular metal outer conductor 3, i.e. the thickness of the metal strip 30, is preferably between 0.1mm and 0.58 mm; the metal belt 30 may be an aluminum belt, and the thickness of the aluminum belt is preferably 0.30mm to 0.58 mm; the metal belt 30 may be a copper belt, and the thickness of the copper belt is preferably 0.10mm to 0.35 mm; the thinnest metal belt capable of being stably welded is adopted in principle to increase the flexibility of the feeder line and reduce the material cost;
the lap seam welding of the metal band 30 adopts argon arc welding, the alternating current sawtooth wave of the argon arc welding is changed into a regular wave, and the standing wave time of the peak value and the valley value is controlled through the regular wave band according to the thickness of the metal band 30, so that the lap seam welding temperature of the metal band 30 is controlled;
and continuously extruding the third metal plastic-bonded layer 34 in an online manner: a third plastic extruder 03 is arranged in the conveying direction of the inner conductor, the insulator and the outer conductor coaxial cable core 123, the metal plastic-bonded layer material 10 is continuously extruded to form a third metal plastic-bonded layer 34 through the third plastic extruder 03, the thickness of the third metal plastic-bonded layer 34 is preferably 0.09 mm-0.12 mm, and the continuously formed inner conductor, insulator and outer conductor coaxial cable core 123 is coaxially coated with the third metal plastic-bonded layer 34;
on-line continuous extrusion of sheath 4: a fourth plastic extruder 04 is arranged in the output direction of the third plastic extruder 03, the polyethylene or low-smoke halogen-free flame-retardant material 40 continuously extrudes a sheath 4 on line through the fourth plastic extruder 04, the thickness of the sheath 4 is preferably 0.8 mm-1.1 mm, and the sheath 4 is coaxially coated and bonded on the continuously generated inner conductor, insulator and outer conductor coaxial cable core 123 through a third metal plastic-bonded layer 34;
a close-fitting drawing die 05 is arranged in the output direction of the fourth plastic extruder 05, and the sheath 4 is tightly fitted with the smooth tubular metal outer conductor 3 into a whole through the third metal plastic-bonded layer 34 by tightly fitting the drawing die 05, so that a finished product 5 is manufactured.
The finished product 5 was tested as follows: the method comprises the following steps of (1) resistance test detection of a flexible inner conductor 1 and a smooth tubular metal outer conductor 3, capacitance test of a foamed polyethylene dielectric layer 2 and weather resistance test of a sheath 4; and (3) detecting the impedance, attenuation and standing-wave ratio of the finished product 5, detecting the bending property, mechanical extrusion, tensile strength and the like of the finished product 5, and packaging and warehousing the qualified finished product 5 after performance detection.
The machines to which the present invention relates are prior art and will not be described further herein.
The above description is only a preferred embodiment of the present invention, and the above preferred embodiment is not intended to limit the scope of the present invention; all equivalent modifications made in accordance with the scope of the claims of the present invention are covered by the scope of the claims of the present invention.
Claims (10)
1. A method of manufacturing a coaxial cable, comprising:
preparing a metal plastic-bonded layer material: the preparation proportion is 1: (0.08-0.25) mixing polyethylene and a metal plastic adhesive to prepare a metal plastic adhesive layer material;
continuously manufacturing the flexible inner conductor on line: adopting soft metal as a soft inner conductor, and carrying out wire drawing, continuous annealing and online preheating on the soft inner conductor, wherein the online preheating temperature is between 80 and 90 ℃;
continuously manufacturing the inner conductor and the coaxial cable core of the insulator on line by adopting a temperature control-medium-pressure nitrogen physical foaming-continuous single-layer extrusion-continuous double-layer co-extrusion-layer-by-layer covering method:
arranging a first plastic extruder in the conveying direction of the flexible inner conductor, wherein the first plastic extruder is connected with a physical foaming extruder and a second plastic extruder on line respectively, and the physical foaming extruder and the second plastic extruder are connected with a co-extruder head;
the body temperature of the first plastic extruder is ranged from 180 ℃ to 210 ℃, the head temperature is ranged from 190 ℃ to 220 ℃, the body temperature of the physical foaming extruder is ranged from 180 ℃ to 220 ℃, the body temperature of the second plastic extruder is ranged from 170 ℃ to 220 ℃, and the temperature of the co-extrusion head is ranged from 190 ℃ to 230 ℃;
injecting medium-pressure nitrogen with 35-40 atmospheric pressures into a charging barrel of the physical foaming extruder, wherein the medium-pressure nitrogen enables foamed polyethylene in the charging barrel to be physically foamed;
enabling the flexible inner conductor after online preheating to continuously enter a first plastic extruder, acquiring online speed information by adopting an encoder, and controlling continuous single-layer extrusion setting of the first plastic extruder and continuous double-layer co-extrusion setting of a physical foaming extruder and a second plastic extruder, wherein the given linear speed is between 10m/min and 40 m/min;
continuously extruding a first metal plastic-bonded layer with the thickness of 0.1-0.4 mm by a first plastic extruder from the metal plastic-bonded layer material, and coaxially coating the first metal plastic-bonded layer on the continuously generated flexible inner conductor;
after the foamed polyethylene material is physically foamed by a physical foaming extruder, after the metal plastic-bonded layer material passes through a second plastic extruder, a co-extruder head continuously and double-layer co-extrudes a foamed polyethylene medium layer, namely an insulator and a second metal plastic-bonded layer with the thickness of 0.1-0.4 mm, the foamed polyethylene medium layer is coaxially coated and bonded on the continuously generated flexible inner conductor through the first metal plastic-bonded layer, and the second metal plastic-bonded layer is coaxially coated on the continuously generated foamed polyethylene medium layer, so that a coaxial cable core of the inner conductor and the insulator is manufactured;
and continuously manufacturing the inner conductor, the insulator and the outer conductor coaxial cable core on line: processing a metal band by a metal band forming device, enabling the metal band to be coaxially wound on the inner conductor and the insulator coaxial cable core, welding lap seams of the metal band to form a smooth tubular metal outer conductor, and enabling the smooth tubular metal outer conductor to be coaxially coated and bonded on a continuously generated foamed polyethylene medium layer through a second metal plastic-bonded layer, so as to manufacture the inner conductor, the insulator and the outer conductor coaxial cable core;
and continuously extruding a third metal plastic-bonded layer on line: a third plastic extruder is arranged in the conveying direction of the inner conductor, the insulator and the outer conductor coaxial cable core, the metal plastic-bonded layer material is continuously extruded into a third metal plastic-bonded layer through the third plastic extruder, and the third metal plastic-bonded layer coaxially wraps the continuously generated inner conductor, insulator and outer conductor coaxial cable core;
on-line continuous extrusion of the sheath: and arranging a fourth plastic extruder in the output direction of the third plastic extruder, continuously extruding a sheath from the polyethylene or the low-smoke halogen-free flame-retardant material on line by the fourth plastic extruder, coaxially coating the sheath by a third metal plastic-bonded layer, and bonding the sheath on the continuously generated inner conductor, insulator and outer conductor coaxial cable core, thereby manufacturing a finished product.
2. The method of manufacturing a coaxial cable according to claim 1, wherein: the lap seam welding of strap adopts argon arc welding to alternating current sawtooth wave that welds with argon arc changes into the rule type wave, according to the thickness of strap, through the rule type wave band, controls the standing wave time of peak value, valley value, thereby the lap seam welding temperature of control strap.
3. The method of manufacturing a coaxial cable according to claim 1, wherein: and a clinging drawing die is arranged in the output direction of the fourth plastic extruder, and the sheath is clung to the smooth tubular metal outer conductor into a whole through a third metal plastic-sticking layer by clinging to the drawing die.
4. The method of manufacturing a coaxial cable according to claim 1, wherein: the soft inner conductor is made of a soft round copper wire, a soft copper-clad aluminum wire or a soft copper pipe.
5. The method of manufacturing a coaxial cable according to claim 1, wherein: the diameters of the foamed polyethylene medium layer and the second metal plastic-bonded layer are between 8mm and 22 mm.
6. The method of manufacturing a coaxial cable according to claim 1, wherein: the thickness of the pipe wall of the smooth tubular metal outer conductor, namely the thickness of the metal belt, is between 0.1mm and 0.58 mm.
7. The method of manufacturing a coaxial cable according to claim 6, wherein: the metal belt is an aluminum belt, and the thickness of the aluminum belt is between 0.30mm and 0.58 mm.
8. The method of manufacturing a coaxial cable according to claim 6, wherein: the metal belt is a copper belt, and the thickness of the copper belt is between 0.10mm and 0.35 mm.
9. The method of manufacturing a coaxial cable according to claim 1, wherein: the thickness of the third metal plastic-bonded layer is between 0.09mm and 0.12 mm.
10. The method of manufacturing a coaxial cable according to claim 1, wherein: the thickness of the sheath is between 0.8mm and 1.1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010471879.3A CN111755172A (en) | 2020-05-29 | 2020-05-29 | Manufacturing method of coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010471879.3A CN111755172A (en) | 2020-05-29 | 2020-05-29 | Manufacturing method of coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111755172A true CN111755172A (en) | 2020-10-09 |
Family
ID=72674188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010471879.3A Pending CN111755172A (en) | 2020-05-29 | 2020-05-29 | Manufacturing method of coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111755172A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113493144A (en) * | 2021-07-22 | 2021-10-12 | 淮南文峰航天电缆有限公司 | Automatic winding equipment for manufacturing cables |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640083A (en) * | 2009-09-09 | 2010-02-03 | 中天日立射频电缆有限公司 | Method for making carbon dioxide physically foamed RF coaxial cable insulation cable core |
| CN102361147A (en) * | 2011-10-10 | 2012-02-22 | 中天日立射频电缆有限公司 | Flexible type radio-frequency coaxial cable of smooth aluminum tube external conductor and production method thereof |
| CN102800918A (en) * | 2012-08-06 | 2012-11-28 | 汕头市金桥电缆有限公司 | Manufacturing method of wireless communication antenna feeder |
| CN109483021A (en) * | 2018-11-21 | 2019-03-19 | 江苏科技大学 | A kind of double tungsten electrode pulse TIG welding methods |
| CN209487233U (en) * | 2019-04-08 | 2019-10-11 | 江苏新长峰线缆有限公司 | High performance halogen-free flameproof electric cable protective layer coating unit |
| JP2020058067A (en) * | 2019-12-20 | 2020-04-09 | 日立金属株式会社 | Coaxial cable and manufacturing method of the same |
-
2020
- 2020-05-29 CN CN202010471879.3A patent/CN111755172A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640083A (en) * | 2009-09-09 | 2010-02-03 | 中天日立射频电缆有限公司 | Method for making carbon dioxide physically foamed RF coaxial cable insulation cable core |
| CN102361147A (en) * | 2011-10-10 | 2012-02-22 | 中天日立射频电缆有限公司 | Flexible type radio-frequency coaxial cable of smooth aluminum tube external conductor and production method thereof |
| CN102800918A (en) * | 2012-08-06 | 2012-11-28 | 汕头市金桥电缆有限公司 | Manufacturing method of wireless communication antenna feeder |
| CN109483021A (en) * | 2018-11-21 | 2019-03-19 | 江苏科技大学 | A kind of double tungsten electrode pulse TIG welding methods |
| CN209487233U (en) * | 2019-04-08 | 2019-10-11 | 江苏新长峰线缆有限公司 | High performance halogen-free flameproof electric cable protective layer coating unit |
| JP2020058067A (en) * | 2019-12-20 | 2020-04-09 | 日立金属株式会社 | Coaxial cable and manufacturing method of the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113493144A (en) * | 2021-07-22 | 2021-10-12 | 淮南文峰航天电缆有限公司 | Automatic winding equipment for manufacturing cables |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100686678B1 (en) | Foam coaxial cable and method of manufacturing the same | |
| KR100626245B1 (en) | High accuracy foamed coaxial cable and method for manufacturing the same | |
| CN102800918B (en) | Manufacturing method of wireless communication antenna feeder | |
| CN105474329A (en) | Transmission line | |
| CN111755172A (en) | Manufacturing method of coaxial cable | |
| CN111755174A (en) | Manufacturing method of inner conductor, insulator and outer conductor coaxial cable core | |
| CN111312445A (en) | Ultra-flexible communication cable in 5G industrial internet digital system and manufacturing method | |
| JPH09510318A (en) | High performance coaxial cable providing high density interface connection and manufacturing method thereof | |
| CN204632443U (en) | A kind of coaxial cable | |
| CN201601208U (en) | Feeder line of wireless communication antenna | |
| US20070105437A1 (en) | Coaxial cable | |
| CN111755173A (en) | Method for manufacturing coaxial cable core of inner conductor and insulator | |
| US20230154652A1 (en) | Coaxial cable | |
| JP2005222832A (en) | Manufacturing method and manufacturing device of cable | |
| CN200972892Y (en) | Radio frequency coaxial cable | |
| CN217113951U (en) | Composite insulating soft low-loss cable | |
| CN218632449U (en) | Active feeder line with combined structure | |
| CN220232750U (en) | Cable and cable assembly | |
| WO2011115296A1 (en) | Coaxial cable | |
| CN216487361U (en) | Insulated cable | |
| JP7353039B2 (en) | Coaxial cable with excellent bending phase stability | |
| CN220627428U (en) | Cable with improved heat dissipation | |
| TWI827100B (en) | Coaxial cable and signal transmission assembly thereof | |
| CN113393969B (en) | Flat through-window coaxial cable and manufacturing method thereof | |
| CN114822930B (en) | Flexible soft shielding cable and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201009 |
|
| RJ01 | Rejection of invention patent application after publication |