CN100576369C - The manufacture method of coaxial cable and interior thin layer thereof - Google Patents
The manufacture method of coaxial cable and interior thin layer thereof Download PDFInfo
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- CN100576369C CN100576369C CN200610037346A CN200610037346A CN100576369C CN 100576369 C CN100576369 C CN 100576369C CN 200610037346 A CN200610037346 A CN 200610037346A CN 200610037346 A CN200610037346 A CN 200610037346A CN 100576369 C CN100576369 C CN 100576369C
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Abstract
The present invention relates to the architecture advances of coaxial cable, relate in particular to the interior laminate structure improvement of coaxial cable and the manufacture method of the interior thin layer of this cable.A kind of coaxial cable, it comprises an inner wire from inside to outside successively, it extends along the longitudinal axis of cable; One insulating barrier, an outer conductor and sheath, this insulating barrier separates internal and external conductor, in addition, also has thin layer in one deck EAA spraying between inner wire and insulating barrier.Coaxial cable of the present invention is changed thin layer in not adding in the past or is added the interior thin layer of one deck extrusion process, but add the interior thin layer of EAA spraying that one deck uses spraying coating process to make, use spraying coating process can effectively control thickness of thin layer in the EAA spraying, can effectively overcome the drawback separately that aforementioned two kinds of situations are brought after having controlled the interior thickness of thin layer of EAA, and reach optimum efficiency.
Description
Technical field
The present invention relates to the architecture advances of coaxial cable, relate in particular to the interior laminate structure improvement of coaxial cable and the manufacture method of the interior thin layer of this cable.
Background technology
At present, 7/8 " the ultra-soft feed line coaxial cable is used very extensively at short distance and indoor/portable communications systems such as outdoor jumper assemblies, develops also very rapidly, and the product of different manufacturers production has their own characteristics each.Traditional 7/8 " the ultra-soft feed line coaxial cable is because inner wire is special spirality wrinkle structure, thin layer or add the interior thin layer of one deck extrusion process in not adding usually; Preceding a kind of technology easily causes inner wire and the tight and generation torsiversion malposition of the coating of insulating in the unwrapping wire process, has destroyed insulation layer structure, insulating barrier is deformed and uneven bad phenomenon; A kind of technology in back causes decay to increase then because the interior thin layer of extrusion process is thicker, influences signal transmission effect.Referring to the patent No. is 00104331.5 Chinese patent, wherein disclose a kind of do not add in the coaxial cable of thin layer.For fear of above two kinds of bad phenomenon, must find a kind of effectively interior thin layer addition manner, " combination property of ultra-soft feed line coaxial cable, convenient client's use to improve 7/8.
Summary of the invention
The present invention has overcome shortcoming of the prior art, and a kind of coaxial cable with novel interior laminate structure is provided, and the insulation layer structure in this coaxial cable is stable and signal transmission effect is good.
The present invention also provides the manufacture method of thin layer in a kind of above-mentioned coaxial cable.
In order to solve the problems of the technologies described above, be achieved through the following technical solutions:
A kind of coaxial cable, it comprises an inner wire from inside to outside successively, it extends along the longitudinal axis of cable; One insulating barrier, an outer conductor and sheath, this insulating barrier separates internal and external conductor, in addition, also has thin layer in one deck EAA spraying between inner wire and insulating barrier.
The manufacture method of thin layer in a kind of above-mentioned coaxial cable, it mainly comprises the steps: a inner wire unwrapping wire; B. inner wire alignment; C. inner wire sizing; D. inner wire traction; E. inner wire preheating; F. insulating barrier extrusion molding; In addition, between above-mentioned steps e and f, increase EAA spraying step.
Described EAA spraying step detailed process is as follows: make the plug die of inner wire in the EAA spray equipment enter EAA powder case, the compressed air of bottom blows to the feed opening of EAA powder case, and simultaneously, EAA powder case keeps vibration always, the EAA powder swims in and is coated with in the stringing, is stained with on the inner wire then.At last, with unnecessary EAA Powder Recovery.
Coaxial cable of the present invention is changed thin layer in not adding in the past or is added the interior thin layer of one deck extrusion process, but add the interior thin layer of EAA spraying that one deck uses spraying coating process to make, use spraying coating process can effectively control thickness of thin layer in the EAA spraying, can effectively overcome the drawback separately that aforementioned two kinds of situations are brought after having controlled the interior thickness of thin layer of EAA, and reach optimum efficiency.
Description of drawings
Fig. 1 is the sectional view of coaxial cable of the present invention;
Employed EAA spray equipment figure in Fig. 2 the inventive method;
Fig. 3 the inventive method flow chart.
Embodiment
Introduce method of the present invention below with reference to Fig. 1 and Fig. 2 and in conjunction with object lesson.
Referring to Fig. 1, be the sectional view of coaxial cable of the present invention, this coaxial cable is made up of thin layer, insulation, outer thin layer, outer conductor and sheath in spirality wrinkle inner wire, the spraying coating process.
1, inner wire
The spirality wrinkle copper pipe of selecting vertical bag welding of copper strips and the accurate embossing of process for use is as inner wire, and such structural design can guarantee that cable has electric property, mechanical performance and flexibility preferably.
2, interior thin layer, insulating barrier, outer thin layer
Because the dielectric constant of interior thin layer, outer thin layer material is bigger, therefore, consider from the attenuation constant angle, its thickness should be done little.For guaranteeing between inner wire and the insulating barrier good caking property is arranged, elder generation's thin layer in inner wire spraying one deck EAA prevents that like this cable inner wire when bending from separating with insulating barrier before the insulation extrusion molding.In addition,, extrude the outer thin layer of the thick high density polyethylene (HDPE) of one deck 0.1mm (HDPE), can prevent that moisture from infiltrating, and guaranteed the long-time stability of cable at the outer surface of insulation.
Choosing of insulating layer material and structure should make cable that alap loss is arranged, and is enough to guarantee that inner and outer conductor is in coaxial position all the time.For guaranteeing that cable has less attenuation constant, adopt the less high and low density polyethylene of relative dielectric constant as insulating material, and charge into high-purity nitrogen and foam, foam degrees is up to 80%, can greatly reduce the relative dielectric constant and the dielectric loss angle tangent of insulating barrier, reach the purpose that reduces decay.
3, outer conductor
For making cable have good shielding properties and bendability preferably, outer conductor has adopted the vertical bag welding of copper strips and through the annular wrinkle copper pipe of accurate embossing, can effectively prevent entering of moisture.Simultaneously, outer conductor annular wrinkle structure makes inner wire, insulation, outer conductor three fixed-site, forms than stable structure, and the machinery change in size is minimum when cable bending or variations in temperature, makes electric properties such as transmitting phase place very stable.
4, sheath
Sheath adopts polyethylene or low-smoke non-halogen flame-retardant polyethylene, prevents that sheath is subjected to factor affecting such as mechanical external force, moisture, burn into high and low temperature environment factor, makes cable have good weatherability, also has better waterproof and ageing resistace simultaneously.
The main difference of above-mentioned cable and existing cable is, the interior thin layer of above-mentioned cable is to use spraying coating process to finish, and main implementation process of thin layer spraying coating process is as follows in this:
1) referring to Fig. 3, consistent with the method for thin layer in the traditional making, pass through a. internal layer body unwrapping wire; B. inner wire alignment; C. inner wire sizing; D. inner wire traction; E. inner wire preheating; F. insulating barrier extrusion molding;
2) the inventive method increases EAA spraying step between above-mentioned steps e and f, increases an EAA binding agent spray equipment between inner wire preheater and insulation extrusion molding system, and concrete installation drawing sees also Fig. 2.
3) air compression plant 105 is equipped with in EAA powder case 100 belows, and compressed air pressure is adjusted to 0.5MPa by voltage regulating meter 108; Simultaneously, 60 purpose screen packs 102 are equipped with at feed opening 101 places;
3) plug die 106 is equipped with in conduit 103 porch, and the aperture of plug die 106 is consistent with spirality wrinkle inner wire diameter;
When 4) working, spirality wrinkle inner wire enters EAA powder case 100 through plug die, and compressed air 107 blows to feed opening, and simultaneously, EAA powder case 100 keeps vibration always, and vibration frequency is 200Hz, is floated in conduit 103 in EAA material end.Heated during because of inner wire process preheater, EAA material end can be stained with inner wire, and the quantity for spray of EAA powder is about 0.032g/mm
2, the quantity for spray of thin layer is between 0.027～0.041g/mm2 in the general EAA spraying.
5) rewinding case 104 is collected at unnecessary EAA material end.
Above-mentioned coaxial cable adopts thin layer in the spraying coating process, has avoided closely not producing the torsiversion malposition phenomenon because of having interior thin layer the wrinkle inner wire that produces and the coating of insulating; Simultaneously, the decay index of cable there is not influence.Following table is the performance comparison table of thin layer cable in the different modes:
Know that from last table when interior thin layer EAA powder addition is big, will refer to that attenuation constant has a significant impact to the main performance index of cable, the attenuation constant of cable increases with the increase of EAA addition, increase 1 with the increase of interior thickness of thin layer.Because the interior thickness of thin layer of extrusion process is thicker, the addition of wayward EAA, therefore, the cable attenuation of this kind technology is bigger.And adopt spraying coating process can well control EAA powder addition, make it not influence the attenuation constant of cable; Simultaneously, play the effect of bonding spirality wrinkle inner wire and insulation again, convenient client's use.
Above step is the unrestricted technical scheme of the present invention in order to explanation only.Any modification or partial replacement that does not break away from spirit and scope of the invention all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1, a kind of coaxial cable, it comprises an inner wire from inside to outside successively, it extends along the longitudinal axis of cable; One insulating barrier, an outer conductor and sheath, this insulating barrier separates internal and external conductor, it is characterized in that, also has thin layer in one deck EAA spraying between inner wire and insulating barrier.
2, coaxial cable according to claim 1 is characterized in that, the quantity for spray of thin layer is at 0.027～0.041g/mm in the described EAA spraying
2Between.
3, the manufacture method of thin layer in a kind of coaxial cable, described coaxial cable comprises an inner wire from inside to outside successively, it extends along the longitudinal axis of cable; One insulating barrier, an outer conductor and sheath, this insulating barrier separates internal and external conductor, also has thin layer in one deck EAA spraying between inner wire and insulating barrier; The manufacture method of thin layer mainly comprises the steps: a. inner wire unwrapping wire in the coaxial cable; B. inner wire alignment; C. inner wire sizing; D. inner wire traction; E. inner wire preheating; F. insulating barrier extrusion molding; It is characterized in that, between above-mentioned steps e and f, increase EAA spraying step.
4, the manufacture method of thin layer in the coaxial cable according to claim 3, it is characterized in that, described EAA spraying step detailed process is as follows: make the plug die of inner wire in the EAA spray equipment enter EAA powder case, the compressed air of bottom blows to the feed opening of EAA powder case, simultaneously, EAA powder case keeps vibration always, and the EAA powder swims in and is coated with in the stringing, is stained with on the inner wire then.
5, the manufacture method of thin layer in the coaxial cable according to claim 4 is characterized in that, described EAA spraying step also comprises the process with unnecessary EAA Powder Recovery at last.
6, according to the manufacture method of thin layer in claim 4 or the 5 described coaxial cables, it is characterized in that the vibration frequency of described EAA powder case is 200HZ.
7, according to the method for doing of thin layer in claim 3 or the 4 or 5 described coaxial cable systems, it is characterized in that the quantity for spray of described EAA powder is 0.027～0.041g/mm
2Between.
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| CN200610037346A CN100576369C (en) | 2006-08-29 | 2006-08-29 | The manufacture method of coaxial cable and interior thin layer thereof |
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| CN200610037346A CN100576369C (en) | 2006-08-29 | 2006-08-29 | The manufacture method of coaxial cable and interior thin layer thereof |
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| CN100576369C true CN100576369C (en) | 2009-12-30 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8302294B2 (en) * | 2007-12-14 | 2012-11-06 | Andrew Llc | Method of making a coaxial cable including tubular bimetallic inner layer with folded over edge portions |
| CN101819834B (en) * | 2010-04-14 | 2012-05-30 | 珠海汉胜科技股份有限公司 | Manufacturing process of ultra-soft feed line inner conductor |
| CN101887779A (en) * | 2010-06-28 | 2010-11-17 | 江苏通鼎光电股份有限公司 | Low-loss broadcasting coaxial cable and manufacturing method thereof |
| JP5645129B2 (en) * | 2011-04-01 | 2014-12-24 | 日立金属株式会社 | High frequency coaxial cable and manufacturing method thereof |
| CN102856011B (en) * | 2012-10-09 | 2015-04-29 | 上海熊猫线缆股份有限公司 | Single copper wire nylon protecting bush electric wire processing method |
| CN103000304B (en) * | 2012-12-25 | 2014-12-03 | 浙江德通科技有限公司 | Production method for light low-attenuation wrinkled coaxial cable |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4102300A (en) * | 1974-08-16 | 1978-07-25 | S.A. Des Cableries & Trefileries De Cossonay | Apparatus for continuously coating a metal wire at high velocity |
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2006
- 2006-08-29 CN CN200610037346A patent/CN100576369C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4102300A (en) * | 1974-08-16 | 1978-07-25 | S.A. Des Cableries & Trefileries De Cossonay | Apparatus for continuously coating a metal wire at high velocity |
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