CN105223669B - Stranded optical fiber optical cable three-layer co-extruded Loose tube method and three-layer loose tubes - Google Patents
Stranded optical fiber optical cable three-layer co-extruded Loose tube method and three-layer loose tubes Download PDFInfo
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- CN105223669B CN105223669B CN201510790607.9A CN201510790607A CN105223669B CN 105223669 B CN105223669 B CN 105223669B CN 201510790607 A CN201510790607 A CN 201510790607A CN 105223669 B CN105223669 B CN 105223669B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
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- Optics & Photonics (AREA)
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Abstract
The present invention relates to the three-layer co-extruded Loose tube methods of stranded optical fiber optical cable, three-layer co-extruded Loose tube is squeezed out jointly by three screw extruders, this colorant of identical base-material and the interfacial bond power of three layers of color material solution are controlled and used by runner design special in head, pressure, and then it ensure that three-layer co-extruded Loose tube producing feasibility, solve the problems, such as layer-stranding cable be twisted Loose tube identification of unit when being more than 12 and because color material toner reason generate more than long problem, with good use value.
Description
Technical field
The invention belongs to fiber optic cable manufacture fields, and in particular to a kind of three-layer co-extruded Loose tube method of stranded optical fiber optical cable
And three-layer loose tubes.
Background technique
Existing layer-stranding cable technology, the secondary coating of Loose tube be generally thermoplastic material monolayer extrusion and
At only having 12 colors according to domestic standard Loose tube.But with the rapid development of current optical-fiber network, being twisted unit is more than ten
Two large core number layer-stranding cables also increase therewith, easily distinguishing, construction connecting is facilitated to have become problem between twisted unit,
And due in the thermoplastic material of different colours toner shrinkage be difficult to unanimously, this will lead to long more than the Loose tubes of different colours
Consistency is bad, and the high temperature performance of optical cable, tensile property, transmission performance will all be affected, in some instances it may even be possible to portion occur
Divide the exceeded serious situation of optical fiber attenuation in Loose tube.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of three-layer co-extruded Loose tube methods of stranded optical fiber optical cable
And three-layer loose tubes structure, internal layer use this colorant, outer layer is produced by the way of color skin additive color item, the casing of production
It can be with the vitta of different colours, to distinguish the monochromatic casing of other monolayer extrusions.Twisted unit can be used when being more than 12
Casing with vitta can be easily recognized in twisted production, subsequent connecting.This colorant is used additionally, due to internal layer, is avoided
Toner reduces the after-contraction of Loose tube to influence caused by remaining length in color material, and Loose tube can produce smaller controllable light
It is long more than fibre.
In order to achieve the above objectives, technical scheme is as follows:
The three-layer co-extruded Loose tube method of stranded optical fiber optical cable, comprising the following steps:
The first step is separately dried layered material in true qualities, outer layer color cladding and outer layer vitta material；
Layered material, outer layer color cladding and outer layer vitta material in true qualities after drying are passed through different conveyings by second step respectively
Pipeline transport is into the hopper of No.1 extruder, No. two extruders and No. three extruders；
Third step, each layered material passes through screw rod, spiral shell thorax in the No.1 extruder, No. two extruders and No. three extruders
Fusion plastification and conveying respectively enter in respective material distributing cone: layered material in the true qualities according to the different runners designed in head
It is delivered to interior material distributing cone, the outer layer color cladding is delivered to outer material distributing cone, and the outer layer vitta material is delivered to preceding point at die sleeve
Material cone；
4th step controls the revolving speed of the No.1 extruder, No. two extruders and No. three extruders to control each layered material stream
Ratio, and then control Loose tube ectonexine wall thickness and outer layer color skin and vitta accounting, mold core, mould of each layered material stream in head
Converge common extrusion in set, is operated forward under the active force of main traction together with the fiber optic bundle for being filled with water-blocking material；
5th step, the Loose tube after extrusion is cooling first in first segment sink, drives and cools down using main traction, most
It is cooled and shaped in second segment sink, is received while the Loose tube is cooled and shaped with the constant takeup tension of 5N afterwards
Line；
6th step, the Loose tube closing quotation, send to test point after the completion of production and detects.
Preferably, the interior layered material, outer layer color cladding and outer layer vitta are separately dried in the first step at 80-100 DEG C
Material.
Preferably, in the 4th step each extruder screw speed ratio are as follows: No.1 extruder: No. two extruders: No. three squeeze
Machine is 3:3:1-4:3:2 out.
Preferably, in the 5th step, the temperature of the first segment sink recirculated water is 30-35 DEG C, and the second segment sink follows
The temperature of ring water is 20-25 DEG C.
Preferably, in the 6th step, Loose tube is closed with the speed of 150-250m/min.
Preferably, a kind of three-layer loose tubes successively include: set outer tube layer, set inner tube layer from outside to inside and are filled with resistance
Several optical fiber of water object, described sleeve pipe outer layer include outer layer color cladding and outer layer vitta material, and described sleeve pipe internal layer is true qualities internal layer
Material.
Preferably, described sleeve pipe internal layer wall thickness: described sleeve pipe outer layer wall thickness is 3:2-2:1.
Preferably, the width of the outer layer color cladding: the width of outer layer vitta material is 3:1-4:1.
Preferably, the quantity of the optical fiber is not less than 12 cores.
Preferably, the water-blocking material includes one or more of following: fiber paste, water blocking yarn and water-proofing powder.
The beneficial effects of the present invention are:
One, three-layer co-extruded technique of the invention, internal layer use this colorant, and outer layer uses color skin additive color item, so that pine set
Pipe is with the vitta without color, and to distinguish the monochromatic casing of other monolayer extrusions, it is super to solve the twisted unit of layer-stranding cable
The identification problem of Loose tube when crossing 12.
Secondly, Loose tube internal layer of the invention use this colorant, outer layer use colored material, reduce making for color material
With reducing optical cable production cost；Simultaneously as internal layer uses this colorant, toner is avoided in color material to caused by remaining length
It influences, reduces the after-contraction of Loose tube, Loose tube can produce smaller controllable excess fiber length.
Thirdly, the present invention it is different using interface interior exterior materials refractive index caused by coextrusion process, solve optical fiber color
The problem of opacity, keeps Loose tube color distincter.
Four, the buffer layer when present invention provides for Loose tube stress by ectonexine co-extrusion, increases Loose tube
Mechanical performance.
Detailed description of the invention
It in order to more clearly illustrate the technical solutions in the embodiments of the present invention, below will be in embodiment technical description
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is process flow chart of the invention.
Fig. 2 is the structural schematic diagram of three-layer loose tubes of the invention.
Wherein, 1- covers outer tube layer, 11- outer layer color cladding, 12- outer layer vitta material, 2- set inner tube layer, 3- water-blocking material, 4- light
It is fine.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, disclosing the three-layer co-extruded Loose tube method of stranded optical fiber optical cable in the present embodiment, including following
Step:
Step 1: being separately dried each layer PBT material, (layered material in true qualities, outer layer color cladding, outer layer vitta material) at 100 DEG C.
Step 2: layered material, PBT outer layer color cladding and PBT outer layer vitta material in the PBT true qualities after drying are passed through different conveyings respectively
Pipeline transport is into No.1 extruder, No. two extruders and No. three extruder hoppers.
Step 3: each layer PBT material passes through screw rod, the fusion plastification of spiral shell thorax and conveying in each plastic extruder, according to
The different runners designed in head respectively enter in respective material distributing cone: layered material is delivered to interior material distributing cone, PBT outer layer color in PBT
Cladding is delivered to outer material distributing cone, and PBT outer layer vitta is delivered to the preceding material distributing cone at die sleeve.
Step 4: the screw speed of each extruder is than setting as follows, No.1 extruder: No. two extrusions in the present embodiment
Machine: No. three extruder=3:3:1.Each layer PBT stream converges common extrusion in the mold core, die sleeve of head, and is filled with fiber paste
Fiber optic bundle operated forward under the active force of main traction together.
Step 5: the Loose tube after squeezing out is cooling first in first segment sink (30-35 DEG C of recirculated water), using master
Traction drives and cooling, is finally finally cooled and shaped in second segment sink (20-25 DEG C of recirculated water), is cooled in Loose tube
Take-up is carried out with the constant takeup tension of 5N while type.
Step 6: Loose tube casing is closed with the speed of 180m/min, sent after the completion of production to test point and detected, surveyed
Obtain internal layer wall thickness: outer layer wall thickness=3:2, outer layer color Pi Kuandu: outer layer vitta width=4:1, casing color clear, vitta are bright
It is aobvious.
It is the step of repeating the above-mentioned first step to six steps, measured step 7: the PBT color cladding of replacement different colours
Length is almost the same more than casing.
Embodiment 2
Stranded optical fiber optical cable is disclosed in embodiment 2 with three-layer co-extruded Loose tube method, comprising the following steps:
Step 1: being separately dried each layer PP material (layered material, outer layer color cladding, outer layer vitta material in true qualities) at 80 DEG C.
Step 2: layered material, PP outer layer color cladding and PP outer layer vitta material in the PP true qualities after drying are passed through difference respectively
Transfer pipeline be delivered in No.1 extruder, No. two extruders and No. three extruder hoppers.
Step 3: each layer PP material is by screw rod, the fusion plastification of spiral shell thorax and conveying in each plastic extruder, according to machine
The different runners designed in head respectively enter in respective material distributing cone: PP inner layer material is delivered to interior material distributing cone, PP outer layer color cladding
It is delivered to outer material distributing cone, PP outer layer vitta is delivered to the preceding material distributing cone at die sleeve；
Step 4: the screw speed of each extruder is than setting as follows, No.1 extruder: No. two extruders: No. three are squeezed
Machine=4:3:2 out.Each layer PP stream converges common extrusion in the mold core, die sleeve of head, and is filled with the fiber optic bundle of water blocking yarn
It is operated forward under the active force of main traction together.
Step 5: the Loose tube after squeezing out is cooling first in first segment sink (30-35 DEG C of recirculated water), using master
Traction drives and cooling, is finally finally cooled and shaped in second segment sink (20-25 DEG C of recirculated water), is cooled in Loose tube
Take-up is carried out with the constant takeup tension of 5N while type；
Step 6: Loose tube casing is closed with the speed of 180m/min, sent after the completion of production to test point and detected, surveyed
Obtain internal layer wall thickness: outer layer wall thickness=2:1, outer layer color Pi Kuandu: outer layer vitta width=3:1, casing color clear, vitta are bright
It is aobvious.
Step 7: the PP color cladding of replacement different colours, the step of repeating the above-mentioned first step to six steps, measured set
Guan Yuchang is almost the same.
Embodiment 3
Stranded optical fiber optical cable is disclosed in embodiment 3 with three-layer co-extruded Loose tube method, comprising the following steps:
Step 1: being separately dried each layer PP material (layered material, outer layer color cladding, outer layer vitta material in true qualities) at 90 DEG C.
Step 2: layered material, PP outer layer color cladding and PP outer layer vitta material in the PP true qualities after drying are passed through difference respectively
Transfer pipeline be delivered in No.1 extruder, No. two extruders and No. three extruder hoppers.
Step 3: each layer PP material is by screw rod, the fusion plastification of spiral shell thorax and conveying in each plastic extruder, according to machine
The different runners designed in head respectively enter in respective material distributing cone: PP inner layer material is delivered to interior material distributing cone, PP outer layer color cladding
It is delivered to outer material distributing cone, PP outer layer vitta is delivered to the preceding material distributing cone at die sleeve；
Step 4: the screw speed of each extruder is than setting as follows, No.1 extruder: No. two extruders: No. three are squeezed
Machine=4:3:2 out.Each layer PP stream converges common extrusion in the mold core, die sleeve of head, and is filled with the fiber optic bundle of water-proofing powder
It is operated forward under the active force of main traction together.
Step 5: the Loose tube after squeezing out is cooling first in first segment sink (30-35 DEG C of recirculated water), using master
Traction drives and cooling, is finally finally cooled and shaped in second segment sink (20-25 DEG C of recirculated water), is cooled in Loose tube
Take-up is carried out with the constant takeup tension of 5N while type；
Step 6: Loose tube casing is closed with the speed of 150m/min, sent after the completion of production to test point and detected, surveyed
Obtain internal layer wall thickness: outer layer wall thickness=2:1, outer layer color Pi Kuandu: outer layer vitta width=3:1, casing color clear, vitta are bright
It is aobvious.
Step 7: the PP color cladding of replacement different colours, the step of repeating the above-mentioned first step to six steps, measured set
Guan Yuchang is almost the same.
Embodiment 4
Stranded optical fiber optical cable is disclosed in embodiment 4 with three-layer co-extruded Loose tube method, comprising the following steps:
Step 1: being separately dried each layer PBT material, (layered material in true qualities, outer layer color cladding, outer layer vitta material) at 85 DEG C.
Step 2: layered material, PBT outer layer color cladding and PBT outer layer vitta material in the PBT true qualities after drying are passed through different conveyings respectively
Pipeline transport is into No.1 extruder, No. two extruders and No. three extruder hoppers.
Step 3: each layer PBT material passes through screw rod, the fusion plastification of spiral shell thorax and conveying in each plastic extruder, according to
The different runners designed in head respectively enter in respective material distributing cone: layered material is delivered to interior material distributing cone, PBT outer layer color in PBT
Cladding is delivered to outer material distributing cone, and PBT outer layer vitta is delivered to the preceding material distributing cone at die sleeve.
Step 4: the screw speed of each extruder is than setting as follows, No.1 extruder: No. two extrusions in the present embodiment
Machine: No. three extruder=3:3:1.Each layer PBT stream converges common extrusion in the mold core, die sleeve of head, and is filled with fiber paste
Fiber optic bundle operated forward under the active force of main traction together.
Step 5: the Loose tube after squeezing out is cooling first in first segment sink (30-35 DEG C of recirculated water), using master
Traction drives and cooling, is finally finally cooled and shaped in second segment sink (20-25 DEG C of recirculated water), is cooled in Loose tube
Take-up is carried out with the constant takeup tension of 5N while type.
Step 6: Loose tube casing is closed with the speed of 250m/min, sent after the completion of production to test point and detected, surveyed
Obtain internal layer wall thickness: outer layer wall thickness=3:2, outer layer color Pi Kuandu: outer layer vitta width=4:1, casing color clear, vitta are bright
It is aobvious.
It is the step of repeating the above-mentioned first step to six steps, measured step 7: the PBT color cladding of replacement different colours
Length is almost the same more than casing.
In the above embodiments 1-4, three extruders used is common plastic extruder in the art, the works of extrusion
Skill control condition is also controlled according to actual production, is not particularly limited here.
The production technology of three-layer co-extruded Loose tube realizes internal layer and outer layer color skin additive color co-extrusion, first outer layer Se Pijia
The mode of vitta carries out co-extrusion, and it is produced that the Loose tube of production with vitta can effectively be different from common monolayer extrusion technique
Monochromatic Loose tube also just effectively solves being easily recognized in twisted production, subsequent connecting when twisted unit is more than 12 and asks
Secondly topic uses internal layer for this colorant, outer layer is the mode with color material, the technology of ectonexine co-extrusion has been used, due to internal layer
For this colorant and its directly contacted with water-blocking material, the optical fiber in Loose tube, the remaining length of Loose tube is mainly by the receipts of this colorant of internal layer
Contracting determines.Long influence more than Loose tube brought by different colours material can be effectively eliminated in this way.
Embodiment 5
Three-layer loose tubes are obtained using three-layer co-extruded technology disclosed in embodiment 1-4 in embodiment 5, the three-layer loose tubes
Structure it is as shown in Figure 2, from outside to inside successively include: set outer tube layer 1, set inner tube layer 2 and be filled with the several of water-blocking material 3
Optical fiber 4, specifically, above-mentioned set outer tube layer 1 includes outer layer color cladding 11 and outer layer vitta material 12, above-mentioned set inner tube layer 2 is true qualities
Interior layered material.
In the present embodiment, above-mentioned 2 wall thickness of set inner tube layer: above-mentioned 1 wall thickness of set outer tube layer is 3:2-2:1；Above-mentioned outer layer color
The width of cladding 11: the width of outer layer vitta material 12 is 3:1-4:1.
In the present embodiment, co-extrusion is carried out by the way of outer layer color skin additive color item, the Loose tube band vitta of production can have
Effect is different from common monolayer extrusion technique monochromatic Loose tube produced, when also just effectively the twisted unit of solution is more than 12
Problem is easily recognized in twisted production, subsequent connecting, therefore, the quantity of above-mentioned optical fiber 4 can be not less than 12 cores, above-mentioned resistance
Water object can choose water blocking yarn, water-proofing powder and fiber paste.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (2)
1. the three-layer co-extruded Loose tube method of stranded optical fiber optical cable, which comprises the following steps:
The first step is separately dried layered material in true qualities, outer layer color cladding and outer layer vitta material；
Layered material, outer layer color cladding and outer layer vitta material in true qualities after drying are passed through different transfer pipelines by second step respectively
It is delivered in the hopper of No.1 extruder, No. two extruders and No. three extruders；
Third step, each layered material passes through the melting of screw rod, spiral shell thorax in the No.1 extruder, No. two extruders and No. three extruders
Plasticizing and conveying, respectively enter in respective material distributing cone according to the different runners designed in head: layered material conveys in the true qualities
To interior material distributing cone, the outer layer color cladding is delivered to outer material distributing cone, and the outer layer vitta material is delivered to the preceding material distributing cone at die sleeve；
4th step controls the revolving speed of the No.1 extruder, No. two extruders and No. three extruders to control the ratio of each layered material stream
Example, and then the accounting of Loose tube ectonexine wall thickness and outer layer color skin and vitta is controlled, each layered material stream is in the mold core, die sleeve of head
Converge common extrusion, is operated forward under the active force of main traction together with the fiber optic bundle for being filled with water-blocking material；
5th step, the Loose tube after extrusion is cooling first in first segment sink, drives and cools down using main traction, finally exists
It is cooled and shaped in second segment sink, take-up is carried out with the constant takeup tension of 5N while the Loose tube is cooled and shaped；
6th step, the Loose tube closing quotation, send to test point after the completion of production and detects；
The interior layered material, outer layer color cladding and outer layer vitta material are separately dried in the first step at 80-100 DEG C；
The screw speed ratio of each extruder in 4th step are as follows: No.1 extruder: No. two extruders: No. three extruders are 3:3:1-
4:3:2；
In 5th step, the temperature of the first segment sink recirculated water is 30-35 DEG C, and the temperature of the second segment sink recirculated water is
20-25℃。
2. the three-layer co-extruded Loose tube method of stranded optical fiber optical cable according to claim 1, which is characterized in that the 6th step
In, Loose tube is closed with the speed of 150-250m/min.
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| CN201510790607.9A CN105223669B (en) | 2015-11-17 | 2015-11-17 | Stranded optical fiber optical cable three-layer co-extruded Loose tube method and three-layer loose tubes |
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| CN106772860B (en) * | 2016-12-30 | 2023-11-24 | 通鼎互联信息股份有限公司 | Extrusion die sleeve for three-color strips of 8-shaped optical cable |
| CN109212696A (en) * | 2018-11-08 | 2019-01-15 | 江苏中煤电缆有限公司 | Coal mine low smoke and zero halogen Plastic-sheathed Cable high-temperature resistant optical fiber and its manufacturing method |
| CN113534382B (en) * | 2021-07-28 | 2023-04-07 | 深圳市特发信息股份有限公司 | Layer-stranded optical cable with pressure-resistant loose sleeve, ribbon optical cable and manufacturing method thereof |
| CN116880027B (en) * | 2023-09-07 | 2023-11-24 | 长飞光纤光缆股份有限公司 | Easily constructed optical fiber loose tube unit, optical cable, preparation method and use method thereof |
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|---|---|---|---|---|
| CN101236808A (en) * | 2008-01-25 | 2008-08-06 | 高荣富 | A production method for color cable core with color insulation layer |
| CN201464684U (en) * | 2009-06-02 | 2010-05-12 | 唐良华 | Color skin and color strip shunt device of optical cable |
| CN103331894A (en) * | 2013-07-04 | 2013-10-02 | 苏州市职业大学 | Dry-type fiber loose tube extrusion device |
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2015
- 2015-11-17 CN CN201510790607.9A patent/CN105223669B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236808A (en) * | 2008-01-25 | 2008-08-06 | 高荣富 | A production method for color cable core with color insulation layer |
| CN201464684U (en) * | 2009-06-02 | 2010-05-12 | 唐良华 | Color skin and color strip shunt device of optical cable |
| CN103331894A (en) * | 2013-07-04 | 2013-10-02 | 苏州市职业大学 | Dry-type fiber loose tube extrusion device |
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Effective date of registration: 20230323 Address after: 313000 No. 2299 Qiangyuan East Road, Nanxun Economic Development Zone, Huzhou City, Zhejiang Province Patentee after: Zhejiang Dongtong optical network IOT Technology Co.,Ltd. Address before: 215234 88 Hengtong Road, seven Du Town, Wujiang City, Suzhou, Jiangsu Patentee before: HENGTONG OPTIC-ELECTRIC Co.,Ltd. |
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