CN2689410Y - Shielded cables for local network - Google Patents
Shielded cables for local network Download PDFInfo
- Publication number
- CN2689410Y CN2689410Y CN 200420044473 CN200420044473U CN2689410Y CN 2689410 Y CN2689410 Y CN 2689410Y CN 200420044473 CN200420044473 CN 200420044473 CN 200420044473 U CN200420044473 U CN 200420044473U CN 2689410 Y CN2689410 Y CN 2689410Y
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- CN
- China
- Prior art keywords
- layer
- cable
- cable core
- pairs
- shielding
- 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.)
- Expired - Fee Related
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- Insulated Conductors (AREA)
Abstract
The utility model discloses a shielded cable for local network which comprises a protective casing, a cable core and a shielding layer, the shielding layer is a three-layer structure, an inner polyester lacing layer, an aluminum foil layer and an outer polyester lacing layer are respectively equipped inside to outside; an earth wire is provided between the inner polyester lacing layer and the aluminum foil layer; the cable core is composed of four pairs of paired core wires, and different paired pitches are equipped between each pair of core wires; cross filling strips are equipped among the four pairs of core wires. The structure of the shielding layer with three layer of beltings is adopted by the utility model, all the beltings are accomplished once when the cable core is cabled, a cable-former can be closed down anytime in the operation to replace beltings or the semi-finished products of paired core wires, and the product performance and the back process step production are not influenced; this method can make the shielding layer be overlapped uniformly and the exterior appearance of cables be more round, and simultaneously, this method avoids that when the protective casing is extruded, products are discarded and the shielding performance is not stable caused by the unstableness of the technology of the aluminum foil dragging and covering.
Description
Technical field
The utility model relates to a kind of LAN communications cable, particularly has six class cables of screen.
Background technology
Be applied to six type shielding cables of LAN system at present, its structure is as follows usually: it comprises cable core, and this cable core is made of four pairs of heart yearns that have insulating sleeve, and there is sheath its outside; The aluminium-plastic tape housing is arranged between sheath and cable core, and the inside and outside layer of this housing is respectively aluminium foil and polyester belt.The cable of this structure only adopts one deck polyester belt when stranding; only finish one deck band when being stranding; drag one deck aluminum foil shielded when extruding sheath at last; in the oversheath extrusion; be subjected to the influence of aspect factors such as aluminium foil quality, length easily; and when causing extruding sheath midway by forced-stopping machine, thereby increasing production scraps, and shielding properties instability.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of convenient for production, and properties of product are stable, the LAN shield type six class cables that shield effectiveness is good.
The purpose of this utility model is achieved by following technical proposals: a kind of LAN comprises sheath, cable core and screen with shield type six class cables, and described screen is a three-decker, polyester belt, aluminium foil layer and outer polyester belt in being followed successively by from the inside to the outside.
Has earth connection between interior polyester belt and the aluminium foil layer.
Described cable core is made up of four pairs pair twist heart yearn, has different strands to pitch between every pair of heart yearn; Be provided with the cross filling bar that is used to isolate between described four pairs of heart yearns.
The utility model adopts the shielding layer structure of three layers of band, and all bands are disposable finishing when the cable core stranding, and cabler can be shut down when operation at any time, changes band or strand to the heart yearn semi-finished product, does not influence properties of product and back operation production; And this mode can make screen overlapping evenly, and the cable outward appearance is rounding more, has avoided simultaneously when sheath is extruded, the product rejection and the shielding properties instability that cause because of the instability of dragging alclad paper tinsel technology.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a cross-sectional view of the present utility model.
Fig. 3 is the local enlarged diagram of Fig. 2.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described.
As shown in the figure, the structure of the utility model shield type six class cables mainly comprises the sheath of being made by polyvinyl chloride or other thermoplastic 1, the screen that constitutes by outer polyester belt 2, aluminium foil 3 and interior polyester belt 4, and the cable core that heart yearn 5 is constituted by four pair twists, has different strands to pitch between every pair of heart yearn, kept apart by the cross filling bar between 4 pairs of heart yearns, have earth connection between interior polyester belt 4 and the aluminium foil 3.When stranding makes up, add one deck polyester belt earlier, put an earth connection between polyester belt and aluminium foil, put one deck aluminium foil subsequently, put one deck polyester belt at last again, be only one deck oversheath at last, this kind shielding mode can guarantee that the stranding cable core structure is stable, helps the stable of cable electricity function index, and convenient for production, cable outward appearance rounding can reduce greatly to produce and scrap.
Claims (3)
1, a kind of LAN comprises sheath, cable core and screen with shield type six class cables, and it is characterized in that: described screen is a three-decker, polyester belt, aluminium foil layer and outer polyester belt in being followed successively by from the inside to the outside.
2, shield type six class cables according to claim 1 is characterized in that: have earth connection between interior polyester belt and the aluminium foil layer.
3, shield type six class cables according to claim 1 and 2, it is characterized in that: described cable core is made up of four pairs pair twist heart yearn, has different strands to pitch between every pair of heart yearn; Be provided with the cross filling bar that is used to isolate between described four pairs of heart yearns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420044473 CN2689410Y (en) | 2004-04-07 | 2004-04-07 | Shielded cables for local network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420044473 CN2689410Y (en) | 2004-04-07 | 2004-04-07 | Shielded cables for local network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2689410Y true CN2689410Y (en) | 2005-03-30 |
Family
ID=34671938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420044473 Expired - Fee Related CN2689410Y (en) | 2004-04-07 | 2004-04-07 | Shielded cables for local network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2689410Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074316A (en) * | 2010-12-24 | 2011-05-25 | 领亚电子科技股份有限公司 | Electric wire and cable jacket extrusion and belting synchronization method and equipment for implementing same |
-
2004
- 2004-04-07 CN CN 200420044473 patent/CN2689410Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074316A (en) * | 2010-12-24 | 2011-05-25 | 领亚电子科技股份有限公司 | Electric wire and cable jacket extrusion and belting synchronization method and equipment for implementing same |
| CN102074316B (en) * | 2010-12-24 | 2012-07-11 | 领亚电子科技股份有限公司 | Electric wire and cable jacket extrusion and belting synchronization method and equipment for implementing same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050330 Termination date: 20130407 |