CN109243714A - A kind of Dampproof coaxial cable and its manufacturing process - Google Patents
A kind of Dampproof coaxial cable and its manufacturing process Download PDFInfo
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- CN109243714A CN109243714A CN201811105396.0A CN201811105396A CN109243714A CN 109243714 A CN109243714 A CN 109243714A CN 201811105396 A CN201811105396 A CN 201811105396A CN 109243714 A CN109243714 A CN 109243714A
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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
- H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- 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
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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
- H01B13/016—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
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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
- 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
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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Abstract
The invention discloses a kind of Dampproof coaxial cable and its manufacturing process, step includes: the preparation of inner conductor, pretreated steel wire and copper bar is sent into continued extrusion machine coats first, form copper-clad steel core wire；Insulator extruding machine extrusion insulating materials is encased inner conductor first and forms insulating layer by extruded insulation layer；Outer conductor is processed, insulated electric conductor is passed through in longitudinal wrap mold first, so that aluminium-plastic tape is continuously wrapped on insulated electric conductor, then weaves zinc-plated copper mesh in the periphery of aluminium-plastic tape；The preparation of restrictive coating squeezes out just base with sheath machine first and encases crude cable, recycles electron accelerator to carry out crosslinking with radiation to first base, then foam to it, eventually form Dampproof coaxial cable.The present invention be directed to cable in the prior art because shielding properties decline caused by moisture invasion, signal quality is unstable and failure rate is high etc. the technical issues of improve.The present invention has many advantages, such as moisture-proof, signal delivery quality stabilization and long service life.
Description
Technical field
The present invention relates to a kind of cable production arts, are especially designed into a kind of Dampproof coaxial cable and its manufacturing process.
Background technique
Coaxial cable generally comprises inner conductor, dielectric, outer conductor and sheath.Inner conductor is used to transmit high-frequency current,
Outer conductor will also shield outside electromagnetic interference other than transmitting low-frequency current, and anti-stop signal leaks；The effect of dielectric is resistance
Only radial leakage current, while inner conductors and outer conductor also being wanted to play the role of a support；Sheath plays protection cable
Effect.Between the oversheath and wire-braid of existing generic coaxial cable always can there is gaps, to what is do not laid
Being damaged etc. when coaxial cable sheath extrudes there are tiny flaw, sheath all can be such that moisture content, moisture intrudes into gap, to general
The outer conductor for colluding shaft cable is corroded, so that the transmission performance such as shielding properties of outer conductor be made to decline, causes attenuation constant
Greatly, shielding attenuation reduces, insulation resistance declines, and the signal quality transmitted can gradually be deteriorated, when coaxial cable outer conductor corrodes
When serious, cable will be scrapped because losing transfer function, further, since existing generic coaxial cable is easy to make moist, thus be passed
Defeated route in high band transmission of video information, image, symbol because Changes in weather makes transmission quality unstable, the insulation of product
The electric properties such as resistance and dielectric strength are relatively low and because the factors such as weather easily decline, thus it is hidden to there is very big safety
Suffer from, in addition, moisture is not easy to be discharged, causes cable fault rate high, maintenance difficulty is big.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of Dampproof coaxial cable and its manufacture works
Skill；To solve the signal quality shakiness of shielding properties decline caused by coaxial cable in the prior art is invaded because of moisture, transmission
Fixed, the technical issues of security performance is low and failure rate is high etc.；The present invention has moisture-proof, signal delivery quality stabilization, security performance
The advantages that high and long service life.
The invention is realized by the following technical scheme: the invention discloses a kind of manufacturing process of Dampproof coaxial cable,
Manufacturing process the following steps are included:
Step 1: the preparation of inner conductor
Inner conductor uses Copper covered steel material, stocks up first, gets out steel wire and copper bar, carries out to steel wire and copper bar pre-
After processing, then steel wire and copper bar are sent into continued extrusion machine and complete overmolded process, finally obtains inner conductor；
Step 2: extruded insulation layer
Inner conductor is passed through insulator extruding machine first, then insulator extruding machine squeezes out insulating materials and encases inner conductor shape
At insulating layer, insulated electric conductor is obtained, insulating materials uses polyethylene mixture；
Step 3: processing outer conductor
Outer conductor is made of aluminium-plastic tape and zinc-plated copper mesh, and insulated electric conductor is passed through in longitudinal wrap mold first, so that aluminium
Plastic composite strip is continuously wrapped on insulated electric conductor, and longitudinal tubing is followed by using braider in the outer of the aluminium-plastic tape wrapped
Week weaves zinc-plated copper mesh, obtains crude cable；
Step 4: the preparation of restrictive coating
Crude cable is passed through to the extrusion die of sheath machine first, sheath machine squeezes out just base and encases crude cable, recycles
Electron accelerator carries out crosslinking with radiation to first base, and the crude cable after crosslinking with radiation is then passed through foaming machine and is foamed, and sends out
It needs to heat during bubble, eventually forms Dampproof coaxial cable.
Preferably, in order to make copper bar be readily formed, guarantee the intensity of steel wire and improve die life, in step 1,
Pretreatment includes being straightened of steel wire and copper bar, clean and the preheating of steel wire, the pre-heating temperature of steel wire are arranged in 500-650
℃；The deformation temperature range of copper bar is 750-920 DEG C, and the extrusion wheel velocity of continued extrusion machine is set as 4-7rpm.
Preferably, in order to improve the interference free performance and humidity resistance of dielectric, in step 2, polyethylene mixture by
Polyvinyl resin, polyvinyl chloride, plasticizer, stabilizer and lubricant composition, polyvinyl resin, polyvinyl chloride, plasticizer, stabilization
The weight ratio of agent and lubricant are as follows:
Polyvinyl resin water imbibition is small, and electrical insulation capability is excellent but heat-resistant aging is poor；Polyvinyl chloride has preferable machinery
Performance has excellent dielectric properties, but poor to the stability of light and heat；Plasticizer can be such that its flexibility enhances, and be easily worked；
Stabilizer slows down reaction, keeps chemical balance, reduces surface tension, improves the stability to heat；Lubricant is in forming process
One layer of very thin isolation film can be formed between melt and mold, and plastics is made to be not stick to die surface, it is easy to process, and to process
The periphery roundness of dielectric afterwards is high.
Preferably, in order to improve the molding precision of aluminium-plastic tape, in step 3, to plastic-aluminum combined during longitudinal tubing
Two longitudinal edge lap-joints of band are heated, until two longitudinal edges bond together, aluminium-plastic tape is formed surely after cooling
Fixed tubular structure, heating temperature are arranged at 70-75 DEG C.
Preferably, in order to improve the humidity resistance of sheath, in step 4, first base is by polyvinyl resin, sensitizer, activating agent
It is formed with foaming agent, and weight ratio are as follows:
Polyvinyl resin water imbibition is small, and electrical insulation capability is excellent；Sensitizer (allyl methacrylate) can make to hand over
The service performance of material is accelerated and be can be improved to connection reaction speed, expands its application range；Activating agent (nano zine oxide) conduct
A kind of blowing promotor can be improved the catalytic efficiency of foaming agent and be adjustable the burst temperature of foaming agent；Foaming agent makes object
Matter pore-forming.
The dose of radiation of crosslinking with radiation is set as 50-70kGY；The heating temperature that foams is 200-220 DEG C.The shield eventually formed
Jacket layer is crosslinked polyethylene foamed material.
A kind of Dampproof coaxial cable, cable are made using the above manufacturing process.
Compared with existing coaxial cable, the present invention produces copper clad steel inner conductor using continued extrusion method, in this way
The copper-clad coating thickness of production is uniform, no-welding-seam；And reduce the cost of inner conductor.Then, the present invention uses good insulation preformance
Polyethylene mixture improve the interference free performance of dielectric as dielectric, and the dielectric after processing is outer
All roundness are very high so that aluminium-plastic tape uniform in shaping on the periphery of dielectric, and between gap it is uniformly tiny, keep away
Exempt from air and enter aluminium-plastic tape internal corrosion dielectric, improve humidity resistance and improves signal transmission quality.Except this it
Outside, there is good thermal insulation and water resistance, be by the hole that first base is formed as sheath using crosslinked polyethylene foamed material
Even if micropore and be enclosed this cable water inlet, it is also simply present in local tiny area, it is basic to the transmission of signal
Without influence.
Detailed description of the invention
Fig. 1 is coaxial cable cross section structure schematic diagram.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
Embodiment 1 discloses a kind of Dampproof coaxial cable and its manufacturing process, manufacturing process the following steps are included:
Step 1: the preparation of inner conductor 1
Inner conductor 1 uses copper-clad steel core wire, it is necessary first to stock up, get out steel wire and copper bar, be located in advance to it
Reason, i.e. being straightened of steel wire and copper bar are cleaned and the preheating of steel wire, the pre-heating temperature of steel wire are arranged at 500 DEG C；Copper bar is even
The deformation temperature of copper bar is 750 DEG C in continuous extrusion cladding machine, copper can be made to be readily formed and reduce its deformation at this temperature
Power.The extrusion wheel velocity of continued extrusion machine is set as 4rpm, and revolving speed is excessively high to will increase inhomogeneous deformation degree and deformation heat
Amount, to can reduce die life.Steel wire and copper bar are sent into continued extrusion machine and complete overmolded process, finally
To inner conductor；
Step 2: extruded insulation layer 2
Inner conductor 1 is passed through insulator extruding machine first, then insulator extruding machine squeezes out insulating materials and encases inner conductor 1
Insulating layer 2 is formed, insulated electric conductor is obtained, insulating materials uses polyethylene mixture；
Polyethylene mixture is made of polyvinyl resin, polyvinyl chloride, plasticizer, stabilizer and lubricant, polyethylene tree
The weight ratio of rouge, polyvinyl chloride, plasticizer, stabilizer and lubricant are as follows:
Plasticizer uses di-n-octyl phthalate, and stabilizer uses lead sulfate tribasic, and lubricant uses carbon black.
Step 3: processing outer conductor
Outer conductor is made of aluminium-plastic tape 3 and zinc-plated copper mesh 4, and insulated electric conductor is passed through in longitudinal wrap mold first, so that
Aluminium-plastic tape 3 is continuously wrapped on insulated electric conductor, and longitudinal tubing is followed by using braider in the aluminium-plastic tape 3 wrapped
Periphery weave zinc-plated copper mesh 4, obtain crude cable；
Two longitudinal edge lap-joints of aluminium-plastic tape 3 are heated during longitudinal tubing, until two longitudinal edges
Bond together, it is cooling after aluminium-plastic tape 3 form stable tubular structure, heating temperature setting at 70 DEG C, heating be in order to
The film softening pasted among two longitudinal edges to overlap, there are two longitudinal edges after viscosity just strong bond, this
Sample can improve the serious scollop, scallop (alice) occurred when its longitudinal wrap process and diameter rebound problem (diameter of whole cable is greater than
Design requirement).
Step 4: the preparation of restrictive coating 5
Crude cable is passed through to the extrusion die of sheath machine first, sheath machine squeezes out just base and encases crude cable, recycles
Electron accelerator carries out crosslinking with radiation to first base, and the dose of radiation of crosslinking with radiation is set as 50kGY；It then will be after crosslinking with radiation
Crude cable is passed through foaming machine and foams, and the diameter of the restrictive coating 5 after foaming is controlled by mold, and abscess is closed abscess,
Cell diameter is 10 microns, needs to heat in foaming process, and heating temperature is 200 DEG C, eventually forms Dampproof coaxial cable；
First base is made of polyvinyl resin, sensitizer, activating agent and foaming agent, and weight ratio are as follows:
Allyl methacrylate can be used in sensitizer, and nano zine oxide can be used in activating agent；The restrictive coating 5 eventually formed
For crosslinked polyethylene foamed material.
A kind of Dampproof coaxial cable, as shown in Figure 1, cable is made using the above manufacturing process.
Embodiment 2
Embodiment 2 discloses a kind of Dampproof coaxial cable and its manufacturing process, manufacturing process the following steps are included:
Step 1: the preparation of inner conductor 1
Inner conductor 1 uses copper-clad steel core wire, it is necessary first to stock up, get out steel wire and copper bar, be located in advance to it
Reason, i.e. being straightened of steel wire and copper bar are cleaned and the preheating of steel wire, the pre-heating temperature of steel wire are arranged at 650 DEG C；Copper bar is even
The deformation temperature of copper bar is 920 DEG C in continuous extrusion cladding machine, copper can be made to be readily formed and reduce its deformation at this temperature
Power.The extrusion wheel velocity of continued extrusion machine is set as 7rpm, and revolving speed is excessively high to will increase inhomogeneous deformation degree and deformation heat
Amount, to can reduce die life.Steel wire and copper bar are sent into continued extrusion machine and complete overmolded process, finally
To inner conductor；
Step 2: extruded insulation layer 2
Inner conductor 1 is passed through insulator extruding machine first, then insulator extruding machine squeezes out insulating materials and encases inner conductor 1
Insulating layer 2 is formed, insulated electric conductor is obtained, insulating materials uses polyethylene mixture；
Polyethylene mixture is made of polyvinyl resin, polyvinyl chloride, plasticizer, stabilizer and lubricant, polyethylene tree
The weight ratio of rouge, polyvinyl chloride, plasticizer, stabilizer and lubricant are as follows:
Plasticizer uses dibutyl phthalate, and stabilizer uses dibasic lead phosphite, and lubricant uses carbon black.
Step 3: processing outer conductor
Outer conductor is made of aluminium-plastic tape 3 and zinc-plated copper mesh 4, and insulated electric conductor is passed through in longitudinal wrap mold first, so that
Aluminium-plastic tape 3 is continuously wrapped on insulated electric conductor, and longitudinal tubing is followed by using braider in the aluminium-plastic tape 3 wrapped
Periphery weave zinc-plated copper mesh 4, obtain crude cable；
Two longitudinal edge lap-joints of aluminium-plastic tape 3 are heated during longitudinal tubing, until two longitudinal edges
Bond together, it is cooling after aluminium-plastic tape 3 form stable tubular structure, heating temperature setting at 75 DEG C, heating be in order to
The film softening pasted among two longitudinal edges to overlap, there are two longitudinal edges after viscosity just strong bond, this
Sample can improve the serious scollop, scallop (alice) occurred when its longitudinal wrap process and diameter rebound problem (diameter of whole cable is greater than
Design requirement).
Step 4: the preparation of restrictive coating 5
Crude cable is passed through to the extrusion die of sheath machine first, sheath machine squeezes out just base and encases crude cable, recycles
Electron accelerator carries out crosslinking with radiation to first base, and the dose of radiation of crosslinking with radiation is set as 70kGY；It then will be after crosslinking with radiation
Crude cable is passed through foaming machine and foams, and the diameter of the restrictive coating 5 after foaming is controlled by mold, and abscess is closed abscess,
Cell diameter is 20 microns, needs to heat in foaming process, and heating temperature is 220 DEG C, eventually forms Dampproof coaxial cable；
First base is made of polyvinyl resin, sensitizer, activating agent and foaming agent, and weight ratio are as follows:
Allyl methacrylate can be used in sensitizer, and nano zine oxide can be used in activating agent；The restrictive coating 5 eventually formed
For crosslinked polyethylene foamed material.
A kind of Dampproof coaxial cable, as shown in Figure 1, cable is made using the above manufacturing process.
Embodiment 3
Embodiment 3 discloses a kind of Dampproof coaxial cable and its manufacturing process, manufacturing process the following steps are included:
Step 1: the preparation of inner conductor 1
Inner conductor 1 uses copper-clad steel core wire, it is necessary first to stock up, get out steel wire and copper bar, be located in advance to it
Reason, i.e. being straightened of steel wire and copper bar are cleaned and the preheating of steel wire, the pre-heating temperature of steel wire are arranged at 550 DEG C；Copper bar is even
The deformation temperature of copper bar is 830 DEG C in continuous extrusion cladding machine, copper can be made to be readily formed and reduce its deformation at this temperature
Power.The extrusion wheel velocity of continued extrusion machine is set as 5rpm, and revolving speed is excessively high to will increase inhomogeneous deformation degree and deformation heat
Amount, to can reduce die life.Steel wire and copper bar are sent into continued extrusion machine and complete overmolded process, finally
To inner conductor；
Step 2: extruded insulation layer 2
Inner conductor 1 is passed through insulator extruding machine first, then insulator extruding machine squeezes out insulating materials and encases inner conductor 1
Insulating layer 2 is formed, insulated electric conductor is obtained, insulating materials uses polyethylene mixture；
Polyethylene mixture is made of polyvinyl resin, polyvinyl chloride, plasticizer, stabilizer and lubricant, polyethylene tree
The weight ratio of rouge, polyvinyl chloride, plasticizer, stabilizer and lubricant are as follows:
Plasticizer uses dioctyl phthalate, and stabilizer uses dibasic lead phosphite, and lubricant uses graphite.
Step 3: processing outer conductor
Outer conductor is made of aluminium-plastic tape 3 and zinc-plated copper mesh 4, and insulated electric conductor is passed through in longitudinal wrap mold first, so that
Aluminium-plastic tape 3 is continuously wrapped on insulated electric conductor, and longitudinal tubing is followed by using braider in the aluminium-plastic tape 3 wrapped
Periphery weave zinc-plated copper mesh 4, obtain crude cable；
Two longitudinal edge lap-joints of aluminium-plastic tape 3 are heated during longitudinal tubing, until two longitudinal edges
Bond together, it is cooling after aluminium-plastic tape 3 form stable tubular structure, heating temperature setting at 72 DEG C, heating be in order to
The film softening pasted among two longitudinal edges to overlap, there are two longitudinal edges after viscosity just strong bond, this
Sample can improve the serious scollop, scallop (alice) occurred when its longitudinal wrap process and diameter rebound problem (diameter of whole cable is greater than
Design requirement).
Step 4: the preparation of restrictive coating 5
Crude cable is passed through to the extrusion die of sheath machine first, sheath machine squeezes out just base and encases crude cable, recycles
Electron accelerator carries out crosslinking with radiation to first base, and the dose of radiation of crosslinking with radiation is set as 58kGY；It then will be after crosslinking with radiation
Crude cable is passed through foaming machine and foams, and the diameter of the restrictive coating 5 after foaming is controlled by mold, and abscess is closed abscess,
Cell diameter is 14 microns, needs to heat in foaming process, and heating temperature is 208 DEG C, eventually forms Dampproof coaxial cable；
First base is made of polyvinyl resin, sensitizer, activating agent and foaming agent, and weight ratio are as follows:
Allyl methacrylate can be used in sensitizer, and nano zine oxide can be used in activating agent；The restrictive coating 5 eventually formed
For crosslinked polyethylene foamed material.
A kind of Dampproof coaxial cable, as shown in Figure 1, cable is made using the above manufacturing process.
Embodiment 4
Embodiment 4 discloses a kind of Dampproof coaxial cable and its manufacturing process, manufacturing process the following steps are included:
Step 1: the preparation of inner conductor 1
Inner conductor 1 uses copper-clad steel core wire, it is necessary first to stock up, get out steel wire and copper bar, be located in advance to it
Reason, i.e. being straightened of steel wire and copper bar are cleaned and the preheating of steel wire, the pre-heating temperature of steel wire are arranged at 600 DEG C；Copper bar is even
The deformation temperature of copper bar is 880 DEG C in continuous extrusion cladding machine, copper can be made to be readily formed and reduce its deformation at this temperature
Power.The extrusion wheel velocity of continued extrusion machine is set as 6rpm, and revolving speed is excessively high to will increase inhomogeneous deformation degree and deformation heat
Amount, to can reduce die life.Steel wire and copper bar are sent into continued extrusion machine and complete overmolded process, finally
To inner conductor；
Step 2: extruded insulation layer 2
Inner conductor 1 is passed through insulator extruding machine first, then insulator extruding machine squeezes out insulating materials and encases inner conductor 1
Insulating layer 2 is formed, insulated electric conductor is obtained, insulating materials uses polyethylene mixture；
Polyethylene mixture is made of polyvinyl resin, polyvinyl chloride, plasticizer, stabilizer and lubricant, polyethylene tree
The weight ratio of rouge, polyvinyl chloride, plasticizer, stabilizer and lubricant are as follows:
Plasticizer uses dicyclohexyl phthalate, and stabilizer uses dibasic lead phosphite, and lubricant uses carbon black.
Step 3: processing outer conductor
Outer conductor is made of aluminium-plastic tape 3 and zinc-plated copper mesh 4, and insulated electric conductor is passed through in longitudinal wrap mold first, so that
Aluminium-plastic tape 3 is continuously wrapped on insulated electric conductor, and longitudinal tubing is followed by using braider in the aluminium-plastic tape 3 wrapped
Periphery weave zinc-plated copper mesh 4, obtain crude cable；
Two longitudinal edge lap-joints of aluminium-plastic tape 3 are heated during longitudinal tubing, until two longitudinal edges
It bonds together, aluminium-plastic tape 3 forms stable tubular structure after cooling, and heating temperature is arranged at 74 DEG C；
Heating is the film softening in order to paste among two longitudinal edges that overlap, has two longitudinal edges after viscosity
Just meeting strong bond, the serious scollop, scallop (alice) and diameter occurred when can improve its longitudinal wrap process in this way spring back problem to edge
(diameter of whole cable is greater than design requirement).
Step 4: the preparation of restrictive coating 5
Crude cable is passed through to the extrusion die of sheath machine first, sheath machine squeezes out just base and encases crude cable, recycles
Electron accelerator carries out crosslinking with radiation to first base, and the dose of radiation of crosslinking with radiation is set as 67kGY；It then will be after crosslinking with radiation
Crude cable is passed through foaming machine and foams, and the diameter of the restrictive coating 5 after foaming is controlled by mold, and abscess is closed abscess,
Cell diameter is 18 microns, needs to heat in foaming process, and heating temperature is 217 DEG C, eventually forms Dampproof coaxial cable；
First base is made of polyvinyl resin, sensitizer, activating agent and foaming agent, and weight ratio are as follows:
Allyl methacrylate can be used in sensitizer, and nano zine oxide can be used in activating agent；The restrictive coating 5 eventually formed
For crosslinked polyethylene foamed material.
A kind of Dampproof coaxial cable, as shown in Figure 1, cable is made using the above manufacturing process.
The resulting coaxial cable of embodiment 1-4 is tested for the property, concrete outcome is as shown in the table, described in following table
Standard is notice cable quality index request.
Table 1 is the correlation data of the present invention with the cable of existing coaxial cable manufacturing process preparation
Coaxial cable obtained by another Example 1-4 carries out moisture-proof test, and as a comparison case using existing coaxial cable
It tests under identical testing conditions, its step are as follows:
1. adjusting temperature is 45 DEG C using hygrothermal environment locating for DL302 temperature and humidity regulator analog coaxial cable, humidity is
95%；
2. by embodiment 1-4 coaxial cable and existing coaxial cable be respectively put into temperature and humidity regulator；
3. the setting damp heat test time is 100h；
4. declining with the pad value before and after 5411A Network Analyzer test cable core wire damp heat test, and by analyzing signal
The increment subtracted understands the moisture absorption of cable.
Its result is as shown in the table:
Table 2 is the correlation data of the present invention with the moisture-proof test of cable of existing coaxial cable manufacturing process preparation
It can be seen that by Tables 1 and 2 comparison, attenuation constant of the existing coaxial cable before moisture-proof test and after moisture-proof test
It significantly increases, and attenuation constant of the coaxial cable in the present invention before moisture-proof test and after moisture-proof test changes very little, substantially
It remains unchanged.
Signal calculates as follows in Coaxial Cables attenuation constant:
α=αR+αG；
α is complete attenuation, α in formulaRFor conductor decaying, αGFor diectric attenuation, unit is dB/ (100m)；ρ1、ρ2Respectively
The resistivity of internal and external conductor；εrFor the relative dielectric constant of medium；Tg δ is the loss factor of medium, and f is the working frequency of cable
(MHz)；D, D is respectively the electrical effective diameter of internal and external conductor, and unit is mm；K1、K2Internal and external conductor decaying is respectively calculated to use
Coefficient.
Claims (6)
1. a kind of manufacturing process of Dampproof coaxial cable, which is characterized in that the manufacturing process the following steps are included:
Step 1: the preparation of inner conductor
The inner conductor uses copper-clad steel material, stocks up first, gets out steel wire and copper bar, to the steel wire and the copper
Bar is pre-processed, and then the steel wire and the copper bar are sent into continued extrusion machine and complete overmolded process, most
After obtain inner conductor；
Step 2: extruded insulation layer
The inner conductor is passed through insulator extruding machine first, then insulator extruding machine extrusion insulating materials encases leads in described
Body forms the insulating layer, obtains insulated electric conductor, and the insulating materials uses polyethylene mixture；
Step 3: processing outer conductor
Outer conductor is made of aluminium-plastic tape and zinc-plated copper mesh, and the insulated electric conductor is passed through in longitudinal wrap mold first, so that institute
It states aluminium-plastic tape to be continuously wrapped on the insulated electric conductor, longitudinal tubing is followed by using braider in the aluminium wrapped
The periphery of plastic composite strip weaves the zinc-plated copper mesh, obtains crude cable；
Step 4: the preparation of restrictive coating
The crude cable is passed through to the extrusion die of sheath machine first, the sheath machine squeezes out just base and encases the crude electricity
Cable recycles electron accelerator to carry out crosslinking with radiation to the just base, the crude cable after crosslinking with radiation is then passed through foaming
Machine foams, and needs to heat in foaming process, eventually forms the Dampproof coaxial cable.
2. a kind of manufacturing process of Dampproof coaxial cable as described in claim 1, which is characterized in that in step 1, pretreatment
Being straightened including the steel wire and the copper bar is cleaned and the preheating of the steel wire, the pre-heating temperature setting of the steel wire
At 500-650 DEG C；The deformation temperature range of the copper bar is 750-920 DEG C, the extrusion wheel velocity of the continued extrusion machine
It is set as 4-7rpm.
3. a kind of manufacturing process of Dampproof coaxial cable as described in claim 1, which is characterized in that described poly- in step 2
Mixture of ethylene is made of polyvinyl resin, polyvinyl chloride tree, plasticizer, stabilizer and lubricant, and the polyvinyl resin gathers
The weight ratio of vinyl chloride, plasticizer, stabilizer and the lubricant are as follows:
4. a kind of manufacturing process of Dampproof coaxial cable as described in claim 1, which is characterized in that in step 3, longitudinal wrap at
Two longitudinal edge lap-joints of the aluminium-plastic tape are heated during type, until two longitudinal edge is bonded in one
It rises, the aluminium-plastic tape forms stable tubular structure after cooling, and heating temperature is arranged at 70-75 DEG C.
5. a kind of manufacturing process of Dampproof coaxial cable as described in claim 1, which is characterized in that described first in step 4
Base is made of polyvinyl resin, sensitizer, activating agent and foaming agent, and weight ratio are as follows:
The dose of radiation of crosslinking with radiation is set as 50-70kGY；The heating temperature that foams is 200-220 DEG C；The shield eventually formed
Jacket layer is crosslinked polyethylene foamed material.
6. a kind of Dampproof coaxial cable, which is characterized in that the cable is using any moisture-proof coaxial electrical of claim 1-5
The manufacturing process of cable is made.
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| CN201811105396.0A CN109243714A (en) | 2018-09-21 | 2018-09-21 | A kind of Dampproof coaxial cable and its manufacturing process |
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| CN201811105396.0A CN109243714A (en) | 2018-09-21 | 2018-09-21 | A kind of Dampproof coaxial cable and its manufacturing process |
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Cited By (1)
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Application publication date: 20190118 |