CN106842464A

CN106842464A - A kind of layer-stranding cable and preparation method containing gasket for packing

Info

Publication number: CN106842464A
Application number: CN201710241819.0A
Authority: CN
Inventors: 吴俊�
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-23
Filing date: 2015-04-23
Publication date: 2017-06-13
Also published as: CN104730665B; CN106950666A; CN104730665A

Abstract

The invention belongs to technical field of cables, more particularly, to a kind of layer-stranding cable containing gasket for packing, it includes the restrictive coating outside cable core and cable core, it is characterized in that the cable core is by centrally located reinforcer, around the stranded Loose tube of reinforcer, gasket for packing, the fixed bed that all Loose tubes and gasket for packing integral coating are lived is constituted, Loose tube is mutually nontangential, gasket for packing is mutually nontangential, adjacent Loose tube is mutually nontangential with gasket for packing, fixed bed extend into Loose tube, in the internal clearance that gasket for packing is formed, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube is not less than 3 with the quantity sum of gasket for packing；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing.Present invention further teaches the preparation method of optical cable.The present invention has simple structure, is easy to making, more cost-effective, Wen Bianhou stable optical performances, and the machinery equipment for using is simple, less investment；Block-water effect is excellent, cable core length understand etc. beneficial effect.

Description

A kind of layer-stranding cable and preparation method containing gasket for packing

The application is entitled:A kind of layer-stranding cable and preparation method containing gasket for packing, the applying date be：04 month 2015 23 days；Application No.：The divisional application of 201510196156.6 application for a patent for invention.

Technical field

The invention belongs to technical field of cables, more particularly, to a kind of layer-stranding cable containing gasket for packing and preparation method.

Background technology

People's Republic of China's post and telecommunications professional standard：The basic knot of layer-stranding cable is defined in YD/T901-2009 Structure and requirement, its layer-stranding cable are, Ran Hous stranded around center reinforcemen by many Loose tubes and presumable gasket for packing Intertwist body dresses outside yarn class material and forms cable core, makes cable core structure stabilization, and then coating protective layer forming layer again in cable core bag twists Formula optical cable, the material that blocks water is filled or unfilled with cable core gap.This structure is primarily present following defect：For wrapping yarn class Material requirement is higher, should there is enough intensity, and fracture is not in machine wrapping, require to become with low temperature again shrink or Expansion character, if temperature becomes shrinks excessive, is easily caused and stabs Loose tube, and fibercuts is caused what is more, has a strong impact on communication；If Warm variable expansion is excessive, and wrapping can be made not tight, insecure, causes intertwist body in coiling or scattering in, deforms Loose tube Causing fiber transmission performance reduces.Layer of the prior art twists optical cable sheath material, under the conditions of hot and humid, easily separates out, Aging intensity occurs more than 50% and is greatly lowered, and electrical property occurs significant change；Because sheath is weightless in oils environment Excessively, it is impossible to worked more than 12 hours；5Kg, 100 DEG C, 20min can split, pole can simultaneously pass through FV after making cable The combustion test that level and GB2408-80/I specify.

On the other hand, in order that optical cable core reaches effectively blocks water, it is necessary to blocked water material in the inside and outside all fillings of intertwist body, The filling for material that block water needs professional equipment, and is difficult to reach preferable block-water effect.

Intertwist body is wrapped up due to use yarn class material, therefore, it is impossible to learn the length of intertwist body by easy method.

Therefore, people expect there is better method to solve the above problems.

The content of the invention

In order to solve the above problems, an object of the present invention is to disclose a kind of layer-stranding cable containing gasket for packing；This hair The bright second purpose is the preparation method for disclosing the layer-stranding cable；They are realized using following technical scheme.

A kind of layer-stranding cable containing gasket for packing in first embodiment of the invention, it includes cable core and extrusion molding bag Overlay on the restrictive coating outside cable core, it is characterised in that the cable core is by centrally located reinforcer, around stranded many of reinforcer Root Loose tube, the fixed bed that all Loose tube integral coatings are lived, the packed layer outside fixed bed are constituted, any two phases Adjacent Loose tube is mutually circumscribed, all has at least one optical fiber in every Loose tube；Fixed bed is relative to internal pine Sleeve pipe is liquid-tight envelope, and the material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT).

A kind of layer-stranding cable containing gasket for packing of another embodiment in first embodiment of the invention, it is included Restrictive coating outside thering is cable core and extrusion molding to be coated on cable core, it is characterised in that the cable core by centrally located reinforcer, around Many stranded Loose tubes of reinforcer, fixed bed, the packed layer outside fixed bed that all Loose tube integral coatings are lived Constitute, the spacing maximum between the Loose tube that adjacent Loose tube can also be mutually nontangential and adjacent two-by-two is 0.2mm； Fixed bed is extend into the internal clearance of Loose tube formation, all has at least one optical fiber in every Loose tube；Fixed bed phase It is liquid-tight envelope for internal Loose tube, the material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate Ester.

Layer-stranding cable described above, it is characterised in that the material of the packed layer is polypropylene or polyethylene, and is filled out The material of the material and fixed bed that fill layer is differed.

A kind of layer-stranding cable containing gasket for packing in second embodiment of the invention, it includes cable core and extrusion molding bag Overlay on the restrictive coating outside cable core, it is characterised in that the cable core is by centrally located reinforcer, around stranded many of reinforcer Root Loose tube, the fixed bed for living all Loose tube integral coatings are constituted, the Loose tube of arbitrary neighborhood be it is mutually nontangential two-by-two, And the spacing maximum between adjacent Loose tube is 0.2mm, fixed bed is extend into the internal clearance of Loose tube formation, every pine All there is at least one optical fiber in sleeve pipe；Fixed bed is liquid-tight envelope, the material of fixed bed relative to internal Loose tube It is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Further, a kind of layer-stranding cable containing gasket for packing described in embodiment two, it includes cable core and squeezes Modeling is coated on restrictive coating outside cable core, it is characterised in that the cable core is by centrally located reinforcer, stranded around reinforcer Many Loose tubes, the fixed bed of living all Loose tube integral coatings constitute, adjacent Loose tube is mutually circumscribed, every pine All there is at least one optical fiber in sleeve pipe；Fixed bed is liquid-tight envelope, the material of fixed bed relative to internal Loose tube It is polypropylene or polyethylene or polybutylene terephthalate (PBT).

A kind of layer-stranding cable containing gasket for packing in 3rd embodiment of the invention, it includes cable core and extrusion molding bag Overlay on the restrictive coating outside cable core, it is characterised in that the cable core is by centrally located reinforcer, stranded extremely around reinforcer A few Loose tube, at least one gasket for packing, the fixed bed for living all Loose tubes and gasket for packing integral coating are constituted, and have many During Loose tube, the Loose tube of arbitrary neighborhood is that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, When having many gasket for packings, the gasket for packing of arbitrary neighborhood is that the spacing maximum between mutually nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube and gasket for packing is the spacing maximum between mutually nontangential and adjacent Loose tube and gasket for packing It is 0.2mm, fixed bed is extend into the internal clearance that Loose tube, gasket for packing are formed, and all has at least one light in every Loose tube Lead fiber；The quantity of Loose tube is not less than 3 with the quantity sum of gasket for packing；Fixed bed is relative to internal Loose tube and gasket for packing It is liquid-tight envelope, the material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Further, a kind of layer-stranding cable containing gasket for packing described in embodiment three, it includes cable core and squeezes Modeling is coated on restrictive coating outside cable core, it is characterised in that the cable core is by centrally located reinforcer, stranded around reinforcer At least one Loose tube, at least one gasket for packing, the fixed bed of living all Loose tubes and gasket for packing integral coating constitute, have During many Loose tubes, the Loose tube of arbitrary neighborhood is tangent, and when having many gasket for packings, the gasket for packing of arbitrary neighborhood is tangent , adjacent Loose tube is tangent with gasket for packing, all has at least one optical fiber in every Loose tube；The number of Loose tube Amount is not less than 3 with the quantity sum of gasket for packing；Fixed bed is liquid-tight envelope, fixed bed relative to internal Loose tube and gasket for packing Material be polypropylene or polyethylene or polybutylene terephthalate (PBT).

A kind of layer-stranding cable containing gasket for packing in 4th embodiment of the invention, it includes cable core, positioned at cable The first protective layer outside core, the second protective layer outside the first protective layer and extrusion molding are coated on outside the second protective layer Restrictive coating, it is characterised in that the cable core by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, extremely A few gasket for packing, the fixed bed for living all Loose tubes and all gasket for packing integral coatings are constituted, and when having many Loose tubes, are appointed The adjacent Loose tube of meaning is that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, there is many gasket for packings When, the gasket for packing of arbitrary neighborhood is that the spacing maximum between mutually nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube and gasket for packing are that the spacing maximum between mutually nontangential and adjacent Loose tube and gasket for packing is 0.2mm, fixed Layer is extend into the internal clearance that Loose tube, gasket for packing are formed, and all has at least one optical fiber in every Loose tube；Loose tube The quantity sum of quantity and gasket for packing be not less than 3；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, Gu The material of given layer is polypropylene or polyethylene or polybutylene terephthalate (PBT)；The material of the first protective layer is waterstop, the The material of two protective layers is steel band or aluminium strip.

Further, a kind of layer-stranding cable containing gasket for packing described in embodiment four, it includes cable core, is located at The first protective layer outside cable core, the second protective layer outside the first protective layer and extrusion molding are coated on outside the second protective layer Restrictive coating, it is characterised in that the cable core by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, At least one gasket for packing, the fixed bed for living all Loose tubes and all gasket for packing integral coatings are constituted, when having many Loose tubes, The Loose tube of arbitrary neighborhood is tangent, and when having many gasket for packings, the gasket for packing of arbitrary neighborhood is tangent, adjacent Loose tube It is tangent with gasket for packing, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube and the number of gasket for packing Amount sum is not less than 3；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, and the material of fixed bed is polypropylene Or polyethylene or polybutylene terephthalate (PBT)；The material of the first protective layer is waterstop, and the material of the second protective layer is steel Band or aluminium strip.

A kind of preparation method of the layer-stranding cable containing gasket for packing described in embodiment of the present invention 3, it is characterised in that It includes following steps：

The first step：The step of colouring optical fibres:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many Optical fiber, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine Spiral shell chamber in melted, and add modified polypropene gross weight 1%~3% color masterbatch or polybutylene terephthalate (PBT) The color masterbatch of the 1%~3% of gross weight melts and stirs together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while during the optical fiber that the first step is formed penetrated into the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity that 20~40 DEG C are moved through with original Loose tube is drawn, is formed Finished product Loose tube, the length of the optical fiber in finished product Loose tube is 1.002~1.008 times of finished product Loose tube length, finished product Optical fiber in Loose tube at least one；It is repeated multiple times, form many finished product Loose tubes；

3rd step：Cable core forming step：(1) take steel wire or fiberglass-reinforced plastic lever is placed on cable-former as reinforcer On reinforcer discharge device and pull out through the first stranded mould the first medium pore, then pass through the first of the second stranded mould Centre bore, after the 3rd stranded mould the first interstitial hole, be then passed through crossing cable core hole inside extrusion head；(2) by second step Finished product Loose tube that is being formed and being wound on disk tool is by scroll wheel groups and through the first edge hole of the first stranded mould, wear again The first edge hole of the second stranded mould is crossed, the first holes around of the 3rd stranded mould is subsequently passed through, is then passed through extrusion head Internal crosses cable core hole and ensures that finished product Loose tube is located at outside reinforcer；Adjacent bit is located at many Loose tubes and Loose tube Make adjacent Loose tube tangent when putting；（3）The gasket for packing that polypropylene or polythene material make is taken, through the first stranded mould First edge hole, the first edge hole for being then passed through the second stranded mould, the first holes around for being subsequently passed through the 3rd stranded mould, so Afterwards through crossing cable core hole and ensuring that finished product gasket for packing is located at outside reinforcer inside extrusion head；There are many gasket for packings and filling Rope makes adjacent gasket for packing tangent when being located at adjacent position, and gasket for packing is tangent with adjacent Loose tube；（4）Drew extrusion head Reinforcer, gasket for packing and Loose tube, and make the first stranded mould, the second stranded mould, the 3rd stranded mould with rotating mechanism Synchronous axial system, in the injecting hole of polypropylene or polyethylene or polybutylene terephthalate (PBT) the injection extrusion head that will be melted, The polypropylene of melting or polyethylene or polybutylene terephthalate are made using air extractor in the right-hand member exit for crossing cable core hole Ester is close to outside finished product Loose tube and gasket for packing and forms fixed bed；And then form cable core；The quantity of Loose tube and the number of gasket for packing Amount sum is not less than 3；

Wherein, disk tool can be rotated relative to fixed pipe discharging mechanism, and scroll wheel groups are located at the top of pipe discharging mechanism；Along Loose tube Release direction：Pipe discharging mechanism be located at the rear of the first stranded mould, the second stranded mould be located at the first stranded mould front, 3rd stranded mould is located at the front of the second stranded mould, extrusion head and is located at the 3rd stranded mould front；First medium pore, One edge hole is through the first stranded mould and the first medium pore is located at the center of the first stranded mould, and first edge hole has It is multiple and be distributed in outside the first medium pore and first edge hole is not communicated with the first medium pore, the first medium pore central shaft Line is the first spacing with the distance of first edge hole central axis；First centre bore, the first edge hole are through the second stranded mould Tool and the first centre bore is located at the center of the second stranded mould, the first edge hole have it is multiple and be distributed in the first centre bore it Outer and the first edge hole is not communicated with the first centre bore, the first centre bore central axis and the first edge hole central axis Distance is the second spacing；It is that first interstitial hole, the first holes around are through the second stranded mould and the first interstitial hole is located at second The center of stranded mould, the first holes around has multiple and is distributed in outside the first interstitial hole and in the middle of the first holes around and first Hole is not communicated with, and the first edge hole has multiple and is distributed in outside the first centre bore and the first edge hole and the first centre bore It is not communicated with, the distance of the first interstitial hole central axis and the first holes around central axis is the 3rd spacing；First spacing ＞ The spacing of second spacing ＞ the 3rd；The injecting hole of extrusion head is connected to logical with cable core hole excessively；

4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on outside the cable core that the 3rd step is formed by sheath extruding machine extrusion molding, shape Into restrictive coating, the making of layer-stranding cable is completed.

The preparation method of layer-stranding cable of the another kind containing gasket for packing described in embodiment 3, it is characterised in that it is wrapped Contain following steps：

3rd step：Cable core forming step：(1) take steel wire or fiberglass-reinforced plastic lever is placed on cable-former as reinforcer On reinforcer discharge device and pull out through the first stranded mould the first medium pore, then pass through the first of the second stranded mould Centre bore, after the 3rd stranded mould the first interstitial hole, be then passed through crossing cable core hole inside extrusion head；(2) by second step Finished product Loose tube that is being formed and being wound on disk tool is by scroll wheel groups and through the first edge hole of the first stranded mould, wear again The first edge hole of the second stranded mould is crossed, the first holes around of the 3rd stranded mould is subsequently passed through, is then passed through extrusion head Internal crosses cable core hole and ensures that finished product Loose tube is located at outside reinforcer；Adjacent bit is located at many Loose tubes and Loose tube When putting, the gap between the nontangential and adjacent Loose tube of adjacent Loose tube is not more than 0.2mm；（3）Take polypropylene or poly- second The gasket for packing that alkene material makes, through the first edge hole of the first stranded mould, is then passed through the first edge of the second stranded mould Hole, the first holes around for being subsequently passed through the 3rd stranded mould, then pass through crossing inside extrusion head and cable core hole and ensure finished product Gasket for packing is located at outside reinforcer；When having many gasket for packings and gasket for packing to be located at adjacent position, adjacent gasket for packing is nontangential, phase Gap between adjacent gasket for packing is not more than 0.2mm, and the gap between gasket for packing and adjacent Loose tube is not more than 0.2mm；（4） Reinforcer, gasket for packing and the Loose tube of extrusion head were drawn, and made the first stranded mould, the second stranded mould with rotating mechanism Tool, the 3rd stranded mould synchronous axial system, polypropylene or polyethylene or polybutylene terephthalate (PBT) the injection extrusion molding that will be melted In the injecting hole of head, the polypropylene of melting or polyethylene or poly- right are made using air extractor in the right-hand member exit for crossing cable core hole Benzene dicarboxylic acid butanediol ester is close to outside finished product Loose tube and gasket for packing and enters and one is formed in the internal clearance that Loose tube is formed The fixed bed of change；And then form cable core；The quantity of Loose tube is not less than 3 with the quantity sum of gasket for packing；

Layer-stranding cable in the present invention has simple structure, is easy to making, more cost-effective, light after temperature change wide scope change Stable performance is learned, the machinery equipment for using is simple, less investment；Block-water effect is excellent, cable core length understand etc. beneficial effect.

Brief description of the drawings

Fig. 1 is the cross-sectional structure schematic diagram of embodiment of the present invention 1.

Fig. 2 is the cross-sectional structure schematic diagram of embodiment of the present invention 2.

Fig. 3 is the cross-sectional structure schematic diagram of embodiment of the present invention 3.

Fig. 4 is the cross-sectional structure schematic diagram of embodiment of the present invention 4.

Fig. 5 is the dimensional structure diagram of the stranded part used in manufacture method of the present invention.

Specific embodiment

Embodiment 1 to embodiment 4 is a kind of embodiment of the layer-stranding cable containing gasket for packing in the present invention；Implement real Example 5 is the embodiment of preparation method in the present invention.

Embodiment 1

See Fig. 1, layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating 6 outside cable core, it is characterised in that institute Cable core is stated to be lived by centrally located reinforcer 3, around three stranded Loose tubes 2 of reinforcer, by all Loose tube integral coatings Fixed bed 4, the packed layer 5 outside fixed bed constitute, any two adjacent Loose tubes be it is mutually circumscribed, every pine set All there are eight optical fibers 1 in pipe；Fixed bed is liquid-tight envelope relative to internal Loose tube, and the material of fixed bed is poly- third Alkene or polyethylene or polybutylene terephthalate (PBT).

Layer-stranding cable described above, it is characterised in that the Loose tube can be other many, in every Loose tube Optical fiber at least has one.

Further, layer-stranding cable described above, it is characterised in that the adjacent Loose tube can also be two-by-two Mutually the spacing maximum between nontangential and adjacent Loose tube is 0.2mm；Fixed bed extend into Loose tube formation it is interior between In gap.

Layer-stranding cable described above, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, its feature It is that the cable core is integrally wrapped by centrally located reinforcer, around many stranded Loose tubes of reinforcer, by all Loose tubes The fixed bed for covering, the packed layer outside fixed bed are constituted, and any two adjacent Loose tubes are mutually circumscribed, every pines All there is at least one optical fiber in sleeve pipe；Fixed bed is liquid-tight envelope, the material of fixed bed relative to internal Loose tube It is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Embodiment 2

See Fig. 2, layer-stranding cable, it includes cable core and extrusion molding is coated on restrictive coating 6 outside cable core, it is characterised in that institute Cable core is stated to be lived by centrally located reinforcer 3, around seven stranded Loose tubes 2 of reinforcer, by all Loose tube integral coatings Fixed bed 4 constitute, the Loose tube of arbitrary neighborhood is the spacing maximum between Loose tube mutually nontangential and adjacent two-by-two It is 0.2mm, fixed bed is extend into the internal clearance of Loose tube formation, all has eight optical fibers 1 in every Loose tube；It is fixed Layer is liquid-tight envelope relative to internal Loose tube, and the material of fixed bed is polypropylene or polyethylene or poly terephthalic acid fourth two Alcohol ester.

Layer-stranding cable described above, can also be that adjacent Loose tube is mutually circumscribed, and fixed bed does not extend into pine In the internal clearance that sleeve pipe is formed.

Embodiment 3

See Fig. 3, a kind of layer-stranding cable containing gasket for packing, substantially with embodiment 2, difference is wherein two pine sets Pipe is filled rope 7 and is replaced；The material of gasket for packing is polypropylene or polyethylene.

A kind of layer-stranding cable containing gasket for packing in this embodiment, it include cable core and extrusion molding be coated on cable core it Outer restrictive coating, it is characterised in that the cable core is by centrally located reinforcer, around at least one stranded pine set of reinforcer Pipe, at least one gasket for packing, the fixed bed for living all Loose tubes and gasket for packing integral coating are constituted, when having many Loose tubes, The Loose tube of arbitrary neighborhood is that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, there is many fillings During rope, the gasket for packing of arbitrary neighborhood is that the spacing maximum between mutually nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube and gasket for packing be that spacing maximum between mutually nontangential and adjacent Loose tube and gasket for packing is 0.2mm, Gu Given layer is extend into the internal clearance that Loose tube, gasket for packing are formed, and all has at least one optical fiber in every Loose tube；Pine set The quantity of pipe is not less than 3 with the quantity sum of gasket for packing；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, The material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT).

Further, a kind of layer-stranding cable containing gasket for packing described in this embodiment, it includes cable core and squeezes Modeling is coated on restrictive coating outside cable core, it is characterised in that the cable core is by centrally located reinforcer, stranded around reinforcer At least one Loose tube, at least one gasket for packing, the fixed bed of living all Loose tubes and gasket for packing integral coating constitute, have During many Loose tubes, the Loose tube of arbitrary neighborhood is tangent, and when having many gasket for packings, the gasket for packing of arbitrary neighborhood is tangent , adjacent Loose tube is tangent with gasket for packing, all has at least one optical fiber in every Loose tube；The number of Loose tube Amount is not less than 3 with the quantity sum of gasket for packing；Fixed bed is liquid-tight envelope, fixed bed relative to internal Loose tube and gasket for packing Material be polypropylene or polyethylene or polybutylene terephthalate (PBT).

Embodiment 4

See Fig. 4, a kind of layer-stranding cable containing gasket for packing, it include cable core, the first protective layer 8 outside cable core, The second protective layer 9 and extrusion molding outside the first protective layer are coated on the restrictive coating 6 outside the second protective layer, it is characterised in that The cable core is by centrally located reinforcer 3, around stranded five Loose tubes, 2, two gasket for packings 7 of reinforcer, by all pines The fixed bed 4 that sleeve pipe and all gasket for packing integral coatings are lived is constituted, and the Loose tube of arbitrary neighborhood is mutually nontangential, any two-by-two Adjacent Loose tube is that mutually nontangential, arbitrary neighborhood gasket for packing is mutually nontangential and adjacent two-by-two two-by-two with gasket for packing Loose tube between spacing maximum be 0.2mm, the spacing maximum between adjacent gasket for packing be 0.2mm, adjacent Loose tube Spacing maximum between gasket for packing is 0.2mm, and fixed bed is extend into the internal clearance that Loose tube and gasket for packing are formed, every All there are eight optical fibers 1 in Loose tube；Fixed bed is liquid-tight envelope, fixed bed relative to internal Loose tube and gasket for packing Material be polypropylene or polyethylene or polybutylene terephthalate (PBT)；The material of the first protective layer is waterstop, and second protects The material of sheath is steel band or aluminium strip.

Certainly, in this embodiment, can also be between adjacent Loose tube it is to be between tangent, adjacent gasket for packing It is tangent between tangent, adjacent Loose tube and gasket for packing.

A kind of layer-stranding cable containing gasket for packing described in this embodiment, it includes cable core, outside cable core The first protective layer, the second protective layer outside the first protective layer and extrusion molding be coated on restrictive coating outside the second protective layer, It is characterized in that the cable core by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one Gasket for packing, the fixed bed for living all Loose tubes and all gasket for packing integral coatings are constituted, when having many Loose tubes, arbitrary neighborhood Loose tube be that spacing maximum mutually between nontangential and adjacent Loose tube is 0.2mm, when having many gasket for packings, appoint The adjacent gasket for packing of meaning is that the spacing maximum between mutually nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube It is that spacing maximum mutual between nontangential and adjacent Loose tube and gasket for packing is 0.2mm with gasket for packing, fixed bed is stretched into In the internal clearance formed to Loose tube, gasket for packing, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube Quantity sum with gasket for packing is not less than 3；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, fixed bed Material is polypropylene or polyethylene or polybutylene terephthalate (PBT)；The material of the first protective layer is waterstop, the second protection The material of layer is steel band or aluminium strip.

Further, a kind of layer-stranding cable containing gasket for packing described in this embodiment, it includes cable core, is located at The first protective layer outside cable core, the second protective layer outside the first protective layer and extrusion molding are coated on outside the second protective layer Restrictive coating, it is characterised in that the cable core by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, At least one gasket for packing, the fixed bed for living all Loose tubes and all gasket for packing integral coatings are constituted, when having many Loose tubes, The Loose tube of arbitrary neighborhood is tangent, and when having many gasket for packings, the gasket for packing of arbitrary neighborhood is tangent, adjacent Loose tube It is tangent with gasket for packing, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube and the number of gasket for packing Amount sum is not less than 3；Fixed bed is liquid-tight envelope relative to internal Loose tube and gasket for packing, and the material of fixed bed is polypropylene Or polyethylene or polybutylene terephthalate (PBT)；The material of the first protective layer is waterstop, and the material of the second protective layer is steel Band or aluminium strip.

In this embodiment, the difference depending on application scenario can also individually omit the first protective layer or individually omit second and protect Sheath.

In embodiment 3 and embodiment 4, two gasket for packings are not limited to, can be other many gasket for packings, it is also possible to It is only one gasket for packing.

Certainly, the layer-stranding cable in embodiment of the present invention 1 to embodiment 3 described in any embodiment, can As embodiment 4, the first protective layer and the second protective layer are set between cable core and restrictive coating；Further, can be with First protective layer is only set between cable core and restrictive coating or the second protective layer is only set.

Layer-stranding cable described in any of the above-described embodiment, can also set various protective layers, such as outside restrictive coating Steel belt layer is first set, then external sheath layer is set, so can more effectively protect optical fiber therein, make the performances such as mechanical resistance to compression big Big enhancing；Nylon layer can also be set outside restrictive coating, the purpose of ant proof can be so reached；Etc., it is numerous.

Layer-stranding cable described in any of the above-described embodiment, it is characterised in that the material of the reinforcer be steel wire or Fiberglass-reinforced plastic lever.

As further simplifying, the layer-stranding cable described in above-mentioned embodiment 1,2, it is characterised in that the cable core In Loose tube can also be and be arranged in parallel that, rather than stranded setting, be arranged in parallel the stranded dress that can be saved in cabling device Put, in this embodiment it is not even necessary to cabling device；It is, of course, also possible to save Loose tube and optical fiber due to the length of stranded generation, one can be entered Step is cost-effective.

As further simplifying, the layer-stranding cable described in above-mentioned embodiment 3,4, it is characterised in that the cable core In Loose tube, gasket for packing can also be and be arranged in parallel that, rather than stranded setting, be arrangeding in parallel to save in cabling device Stranding device, in this embodiment it is not even necessary to cabling device；It is, of course, also possible to Loose tube and optical fiber are saved due to the length of stranded generation, can With further cost-effective.

Layer-stranding cable described in any of the above-described embodiment, it is characterised in that the material of the restrictive coating be low cigarette without Halogen flame-proof polyethylene or LLDPE or low density polyethylene (LDPE) or medium density polyethylene or high density polyethylene (HDPE).

Layer-stranding cable described in any of the above-described embodiment, it is characterised in that the material of the Loose tube is modified poly- Propylene or polybutylene terephthalate (PBT).

Layer-stranding cable described in any of the above-described embodiment, it is characterised in that the optical fiber be G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 Type or OM2 types or OM3 types.

Embodiment 5

See Fig. 5, and referring to figs. 1 to Fig. 4, the preparation method of the layer-stranding cable described in embodiment 1, it is characterised in that It includes following steps：

The first step：The step of colouring optical fibres:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；Eight times repeatedly, form eight Optical fiber, the dyed layer of any two different optical fibers has different colors；

Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine Spiral shell chamber in melted, and add modified polypropene gross weight 1%~3% color masterbatch or polybutylene terephthalate (PBT) The color masterbatch of the 1%~3% of gross weight melts and stirs together；It is stretched interior by the extrusion head of secondary coated extruding machine Portion has the original Loose tube of cavity, while during the optical fiber that the first step is formed penetrated into the cavity inside original Loose tube, The bosh that original Loose tube makes the optical fiber in cavity that 20~40 DEG C are moved through with original Loose tube is drawn, is formed Finished product Loose tube, the length of the optical fiber in finished product Loose tube is 1.002~1.008 times of finished product Loose tube length；Repeatedly Three times, form three finished product Loose tubes 2；

3rd step：Cable core forming step：(1) steel wire or fiberglass-reinforced plastic lever are taken and is placed on cable-former as reinforcer 3 Reinforcer discharge device on and pull out through the first stranded mould 41 the first medium pore 410, then pass through the second stranded mould Tool 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through extrusion head 51 inside mistake cable core Hole 52；(2) finished product Loose tube 2 that is forming second step and being wound on the first disk tool 11 is by the first scroll wheel groups 31 and passes through The first edge hole 411 of the first stranded mould 41, the first edge hole 421 for being then passed through the second stranded mould 42, it is subsequently passed through First holes around 431 of three stranded moulds 43, then pass through crossing inside extrusion head 51 and cable core hole and ensure finished product Loose tube Outside reinforcer；Finished product Loose tube 2 that is that second step is formed and being wound on the second disk tool 12 passes through the second scroll wheel groups 32 and through the first stranded mould 41 first edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, connect The first holes around 431 through the 3rd stranded mould 43, then pass through crossing cable core hole and ensuring into inside extrusion head 51 Product Loose tube is located at outside reinforcer；Finished product Loose tube 2 that is that second step is formed and being wound on the 3rd disk tool 13 passes through the 3rd Scroll wheel groups 33 simultaneously pass through the first edge hole 411 of the first stranded mould 41, are then passed through the first edge of the second stranded mould 42 Hole 421, the first holes around 431 for being subsequently passed through the 3rd stranded mould 43, to then pass through and cross cable core hole inside extrusion head 51 And ensure that finished product Loose tube is located at outside reinforcer；Make adjacent Loose tube tangent；（3）Drew extrusion head reinforcer and Loose tube, and make the first stranded mould, the second stranded mould, the 3rd stranded mould synchronous axial system with rotating mechanism, by what is melted In the injecting hole 53 of polypropylene or polyethylene or polybutylene terephthalate (PBT) injection extrusion head, the right-hand member in cable core hole is being crossed Exit makes the polypropylene of melting or polyethylene or polybutylene terephthalate (PBT) be close to finished product pine set using air extractor Pipe is outer to form fixed bed；（4）Take outside the bar that polypropylene or polyethylene formed is filled in fixed bed and form packed layer；And then Form cable core；The material of packed layer is differed with the material of fixed bed；

Wherein, the first disk tool 11 can be rotated relative to the first fixed pipe discharging mechanism 21, and the first scroll wheel groups 31 are located at first The top of pipe discharging mechanism 21；Second disk tool 12 can be rotated relative to the second fixed pipe discharging mechanism 22, the second scroll wheel groups 32 Positioned at the top of the second pipe discharging mechanism 22；3rd disk tool 13 can be rotated relative to the 3rd fixed pipe discharging mechanism 23, the 3rd rolling Driving wheel group 33 is located at the top of the 3rd pipe discharging mechanism 23；Along the release direction of Loose tube：3rd pipe discharging mechanism puts pipe positioned at second The front of mechanism, the second pipe discharging mechanism are located at the front of the first pipe discharging mechanism, the first pipe discharging mechanism and are located at the first stranded mould Rear, the second stranded mould are located at the front of the first stranded mould, the 3rd stranded mould and are located at the front of the second stranded mould, squeeze Molding machine head is located at the 3rd stranded mould front；First medium pore, first edge hole be through the first stranded mould and in first Central aperture is located at the center of the first stranded mould, and first edge hole has multiple and is distributed in outside the first medium pore and first edge Hole is not communicated with the first medium pore, between the distance of the first medium pore central axis and first edge hole central axis is first Away from；First centre bore, the first edge hole are through the second stranded mould and the first centre bore is located in the second stranded mould Centre, the first edge hole has multiple and is distributed in outside the first centre bore and the first edge hole and the first centre bore are to be not communicated with , the distance of the first centre bore central axis and the first edge hole central axis is the second spacing；First interstitial hole, around first Hole is through the second stranded mould and the first interstitial hole is located at the center of the second stranded mould, the first holes around have it is multiple and It is distributed in outside the first interstitial hole and the first holes around is not communicated with the first interstitial hole, the first edge hole has multiple and divides Cloth is outside the first centre bore and the first edge hole is not communicated with the first centre bore, the first interstitial hole central axis and first The distance of holes around central axis is the 3rd spacing；The spacing of first the second spacing of spacing ＞＞ the 3rd；The injecting hole of extrusion head It is connected to cable core hole excessively logical；

Certainly, in the above method, Loose tube is not limited to three, can also be many；As long as to coil Loose tube disk tool, Pipe discharging mechanism, scroll wheel groups correspondingly increase；Optical fiber in Loose tube is also not limited to eight, but at least one.

The preparation method of a kind of layer-stranding cable containing gasket for packing described in embodiment 3, it is characterised in that it is included There are following steps：

3rd step：Cable core forming step：(1) take steel wire or fiberglass-reinforced plastic lever is placed on cable-former as reinforcer On reinforcer discharge device and pull out through the first stranded mould 41 the first medium pore 410, then pass through the second stranded mould 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through crossing cable core hole inside extrusion head 51 52；(2) finished product Loose tube that is forming second step and being wound on disk tool is by scroll wheel groups and passes through the first stranded mould 41 First edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, be subsequently passed through the 3rd stranded mould 43 First holes around 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product Loose tube be located at reinforcer outside； Make adjacent Loose tube tangent when being located at adjacent position with many Loose tubes and Loose tube；（3）Take polypropylene or polyethylene material Expect the gasket for packing for making, through the first edge hole 411 of the first stranded mould 41, be then passed through the first side of the second stranded mould 42 Along hole 421, be subsequently passed through the 3rd stranded mould 43 the first holes around 431, then pass through inside extrusion head 51 cross cable core Hole simultaneously ensures that finished product gasket for packing is located at outside reinforcer；Have many gasket for packings and gasket for packing makes adjacent filling out when being located at adjacent position Fill rope it is tangent, gasket for packing is tangent with adjacent Loose tube；（4）Reinforcer, gasket for packing and the Loose tube of extrusion head were drawn, and Make the first stranded mould, the second stranded mould, the 3rd stranded mould synchronous axial system with rotating mechanism, the polypropylene or poly- that will be melted In the injecting hole 53 of ethene or polybutylene terephthalate (PBT) injection extrusion head, used in the right-hand member exit for crossing cable core hole Air extractor makes the polypropylene of melting or polyethylene or polybutylene terephthalate (PBT) be close to finished product Loose tube and gasket for packing Outer formation fixed bed；And then form cable core；The quantity of Loose tube is not less than 3 with the quantity sum of gasket for packing；

3rd step：Cable core forming step：(1) take steel wire or fiberglass-reinforced plastic lever is placed on cable-former as reinforcer On reinforcer discharge device and pull out through the first stranded mould 41 the first medium pore 410, then pass through the second stranded mould 42 the first centre bore, after the 3rd stranded mould 43 the first interstitial hole, be then passed through crossing cable core hole inside extrusion head 51 52；(2) finished product Loose tube that is forming second step and being wound on disk tool is by scroll wheel groups and passes through the first stranded mould 41 First edge hole 411, be then passed through the first edge hole 421 of the second stranded mould 42, be subsequently passed through the 3rd stranded mould 43 First holes around 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product Loose tube be located at reinforcer outside； When being located at adjacent position with many Loose tubes and Loose tube, between the nontangential and adjacent Loose tube of adjacent Loose tube between Gap is not more than 0.2mm；（3）The gasket for packing that polypropylene or polythene material make is taken, through the first side of the first stranded mould 41 Marginal pore 411, the first edge hole 421 for being then passed through the second stranded mould 42, it is subsequently passed through around the first of the 3rd stranded mould 43 Hole 431, then pass through inside extrusion head 51 cross cable core hole and ensure finished product gasket for packing be located at reinforcer outside；There are many to fill out Fill rope and gasket for packing be located at adjacent position when, adjacent gasket for packing is nontangential, and the gap between adjacent gasket for packing is not more than 0.2mm, the gap between gasket for packing and adjacent Loose tube is not more than 0.2mm；（4）Drew the reinforcer of extrusion head, filled out Rope and Loose tube are filled, and makes the first stranded mould, the second stranded mould, the 3rd stranded mould synchronous axial system with rotating mechanism, will In the injecting hole 53 of polypropylene or polyethylene or polybutylene terephthalate (PBT) the injection extrusion head of melting, cable core hole is being crossed Right-hand member exit be close into the polypropylene of melting or polyethylene or polybutylene terephthalate (PBT) using air extractor The fixed bed of integration is formed in the internal clearance formed outside product Loose tube and gasket for packing and into Loose tube；And then form cable core； The quantity of Loose tube is not less than 3 with the quantity sum of gasket for packing；

In the present invention, the spacing of first the second spacing of spacing ＞＞ the 3rd can make Loose tube/gasket for packing in cable core progressively When shaping reaches fixed formable layer, the technique effect such as its indeformable, easy shaping.

Or, in optical cable described above or fiber optic cable production method, the restrictive coating described in any embodiment is by following weight The raw material composition of part：BS：30~55 parts；Poly- (2,6 diethyl-Isosorbide-5-Nitrae-phenylene) ether：25~50 Part；LLDPE：15~35 parts；Polypropylene：20~35 parts；Butylene：15~45 parts；The cycloalkanes of commercially available model 4006 Base white oil：8~30 parts；Trioctyl phosphate：30~50 parts；Lubricant：1~4 part；Cable jacket is anti-oxidant with model 1010 Agent：0.3~0.8 part；Model UV-234 or UV-360 ultraviolet-resistant absorbent：0.3~0.7 part；Titanium dioxide：5~10 parts；It is poly- Ethylene waxes：4~8 parts.The restrictive coating of above-mentioned formula after 2400 hours aging, is not separated out under 85 DEG C and 85 humidity environments, machinery Intensity can keep before ageing more than 96%, and electrical property is without substantially change；Soaked in 97# gasoline 24 hours bodies lost weights≤ 10%；Under 135 DEG C, 1h and 12Kg loading conditions, there is no cracking phenomena；Make passed through after cable FV-0 grades and The combustion test that GB2408-80/I specifies.

It is of the invention compared with traditional use yarn class is wrapped up, with the faster advantage of speed of production, reached 250m/ The most fast stranding speed of min, and stranding speed only 80m/min of the prior art；Hence it is evident that save electric power input and Artificial input.

10000 infiltration tests of optical cable are equally done, it is of the invention compared with traditional layer-stranding cable, by YD/T901- The method test of 2009 regulations, does not have infiltration phenomenon in the present invention, and traditional layer-stranding cable has reached 10% infiltration Rate, therefore, the present invention has more preferable water permeability resistance energy.

The present invention does experiment in being placed on -50 to+90 DEG C of temperature test chambers, and with -50 DEG C ,+90 DEG C, per temperature spot, holding 24 is small When, it is once alternately a circulation, continuous 300 times, maximum temperature change additional attenuation value is 0.035dB/km；And existing skill Layer-stranding cable in art, in the range of said temperature, 2 circulations have occurred as soon as temperature change additional attenuation value for 0.3dB/km Phenomenon, have impact on being normally carried out for optic communication, through dissect, have on the Loose tube of many places occur prick trace;Therefore, the present invention has more Excellent temperature resistance becomes performance.

In the present invention, length mark can be stamped on fixed bed, the purpose of convenient identification can be reached, meanwhile, may be used also Using the fixed bed of different colours, to reach the purpose of differentiation.

Layer-stranding cable in the present invention has simple structure, is easy to making, more cost-effective, light after temperature change wide scope change Stable performance is learned, the machinery equipment for using is simple, less investment；The main Advantageous such as block-water effect is excellent, cable core length understands Effect.

The present invention is not limited to above-mentioned preferred forms, it will be appreciated that design of the invention can be by other a variety of shapes Formula is implemented to use, and they are also fallen within protection scope of the present invention.

Claims

1. a kind of layer-stranding cable containing gasket for packing, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, and it is special Levy is that the cable core is filled by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one Rope, the fixed bed that all Loose tubes and gasket for packing integral coating are lived, the packed layer outside fixed bed are constituted, and have many pines During sleeve pipe, the Loose tube of arbitrary neighborhood is that the spacing maximum between mutually nontangential and adjacent Loose tube is 0.2mm, is had During many gasket for packings, the gasket for packing of arbitrary neighborhood is that the spacing maximum between mutually nontangential and adjacent gasket for packing is 0.2mm, adjacent Loose tube and gasket for packing is the spacing maximum between mutually nontangential and adjacent Loose tube and gasket for packing It is 0.2mm, fixed bed is extend into the internal clearance that Loose tube, gasket for packing are formed, and all has at least one light in every Loose tube Lead fiber；The quantity of Loose tube is not less than 3 with the quantity sum of gasket for packing；Fixed bed is relative to internal Loose tube and gasket for packing It is liquid-tight envelope, the material of fixed bed is polypropylene or polyethylene or polybutylene terephthalate (PBT)；The material of the packed layer Material is polypropylene or polyethylene, and the material of packed layer is differed with the material of fixed bed.

2. a kind of layer-stranding cable containing gasket for packing, it includes cable core and extrusion molding is coated on restrictive coating outside cable core, and it is special Levy is that the cable core is filled by centrally located reinforcer, around at least one stranded Loose tube of reinforcer, at least one Rope, the fixed bed that all Loose tubes and gasket for packing integral coating are lived, the packed layer outside fixed bed are constituted, and have many pines During sleeve pipe, the Loose tube of arbitrary neighborhood is tangent, when having many gasket for packings, the gasket for packing of arbitrary neighborhood be it is tangent, it is adjacent Loose tube and gasket for packing be tangent, all there is at least one optical fiber in every Loose tube；The quantity of Loose tube with fill out The quantity sum for filling rope is not less than 3；Fixed bed is liquid-tight envelope, the material of fixed bed relative to internal Loose tube and gasket for packing It is polypropylene or polyethylene or polybutylene terephthalate (PBT)；The material of the packed layer is polypropylene or polyethylene, and is filled out The material of the material and fixed bed that fill layer is differed.

3. a kind of layer-stranding cable containing gasket for packing according to claim 1 or claim 2, it is characterised in that；It is described The material of restrictive coating be low-smoke non-halogen flame-retardant polyethylene or low density polyethylene (LDPE) or medium density polyethylene or high density polyethylene (HDPE) or Person is made up of the raw material of following weight portion：BS：30~55 parts；Poly- (2,6 diethyl-Isosorbide-5-Nitrae-Asia benzene Base) ether：25~50 parts；LLDPE：15~35 parts；Polypropylene：20~35 parts；Butylene：15~45 parts；Commercially available type Number be 4006 naphthenic base white oils：8~30 parts；Trioctyl phosphate：30~50 parts；Lubricant：1~4 part；Cable jacket model 1010 antioxidant：0.3~0.8 part；Model UV-234 or UV-360 ultraviolet-resistant absorbent：0.3~0.7 part；Titanium white Powder：5~10 parts；Tissuemat E：4~8 parts.

4. a kind of layer-stranding cable containing gasket for packing according to claim 3, it is characterised in that the material of the Loose tube It is modified polypropene or polybutylene terephthalate (PBT).

5. a kind of layer-stranding cable containing gasket for packing according to claim 1 or claim 2 or claim 4, it is special Levy is that the optical fiber is G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a Type or A1b types or A1c types or A1d types or OM1 types or OM2 types or OM3 types.

6. a kind of preparation method of the layer-stranding cable containing gasket for packing, it is characterised in that it includes following steps：

4th step：Restrictive coating forming step：By protective cover material by sheath extruding machine extrusion molding be coated on the 3rd step formed cable core it Outward, restrictive coating is formed, the protective cover material is LLDPE or is made up of the raw material of following weight portion：Butadiene-benzene Ethylene copolymer：30~55 parts；Poly- (2,6 diethyl-Isosorbide-5-Nitrae-phenylene) ether：25~50 parts；LLDPE：15~ 35 parts；Polypropylene：20~35 parts；Butylene：15~45 parts；The naphthenic base white oil of commercially available model 4006：8~30 parts；Tricresyl phosphate is pungent Ester：30~50 parts；Lubricant：1~4 part；The cable jacket antioxidant of model 1010：0.3~0.8 part；Model UV- 234 or UV-360 ultraviolet-resistant absorbents：0.3~0.7 part；Titanium dioxide：5~10 parts；Tissuemat E：4~8 parts；Complete layer The making of stranded cables.

7. a kind of preparation method of the layer-stranding cable containing gasket for packing, it is characterised in that it includes following steps：

3rd step：Cable core forming step：(1) take steel wire or fiberglass-reinforced plastic lever is placed on cable-former as reinforcer On reinforcer discharge device and pull out through the first stranded mould the first medium pore, then pass through the first of the second stranded mould Centre bore, after the 3rd stranded mould the first interstitial hole, be then passed through crossing cable core hole inside extrusion head；(2) by second step Finished product Loose tube that is being formed and being wound on disk tool is by scroll wheel groups and through the first edge hole of the first stranded mould, wear again The first edge hole of the second stranded mould is crossed, the first holes around of the 3rd stranded mould is subsequently passed through, is then passed through extrusion head Internal crosses cable core hole and ensures that finished product Loose tube is located at outside reinforcer；Adjacent bit is located at many Loose tubes and Loose tube When putting, the gap between the nontangential and adjacent Loose tube of adjacent Loose tube is not more than 0.2mm；（3）Take polypropylene or poly- second The gasket for packing that alkene material makes, through the first edge hole of the first stranded mould, is then passed through the first edge of the second stranded mould Hole, the first holes around for being subsequently passed through the 3rd stranded mould, then pass through crossing inside extrusion head and cable core hole and ensure finished product Gasket for packing is located at outside reinforcer；When having many gasket for packings and gasket for packing to be located at adjacent position, adjacent gasket for packing is nontangential, Gap between adjacent gasket for packing is not more than 0.2mm, and the gap between gasket for packing and adjacent Loose tube is not more than 0.2mm；（4）Drew reinforcer, gasket for packing and the Loose tube of extrusion head, and made the first stranded mould, second stranded with rotating mechanism Mould, the 3rd stranded mould synchronous axial system, polypropylene or polyethylene or the polybutylene terephthalate (PBT) injection that will be melted are squeezed In the injecting hole of molding machine head, the polypropylene of melting or polyethylene or poly- are made using air extractor in the right-hand member exit for crossing cable core hole One is formed in the internal clearance that mutual-phenenyl two acid bromide two alcohol ester is close to outside finished product Loose tube and gasket for packing and is formed into Loose tube The fixed bed of body；And then form cable core；The quantity of Loose tube is not less than 3 with the quantity sum of gasket for packing；