CN110794544A - Bundling process for polyolefin plastic-coated optical fibers - Google Patents
Bundling process for polyolefin plastic-coated optical fibers Download PDFInfo
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- CN110794544A CN110794544A CN201911201929.XA CN201911201929A CN110794544A CN 110794544 A CN110794544 A CN 110794544A CN 201911201929 A CN201911201929 A CN 201911201929A CN 110794544 A CN110794544 A CN 110794544A
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- optical fiber
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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
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Abstract
The invention discloses a bundling process for polyolefin plastic-coated optical fibers, which comprises the following steps: (1) n (n is more than or equal to 6 and less than or equal to 12) optical fibers are released through an optical fiber pay-off rack, and the optical fibers enter a stranding platform for reversing stranding after passing through an optical fiber branching die; (2) positioning the stranded optical fiber bundle by an optical fiber positioning die, and then putting the optical fiber bundle into a powder applying box for applying powder; (3) covering the powdered optical fiber bundle with a polyolefin sheath through an extruder, and sizing the sheath in a vacuumizing sizing device; (4) and (3) after the sized plastic-coated optical fiber is shaped by cold and hot water treatment, sequentially entering a traction wheel and a tension wheel, and then taking up the optical fiber by a take-up system. The bundling process of polyolefin plastic-coated optical fiber can prepare an indoor wiring optical cable based on a micro-bundle tube, and the optical cable has the advantages of simple structure, light weight and small volume, and can meet the requirements of large-scale and large-capacity building wiring optical cable use environments.
Description
Technical Field
The invention relates to the technical field of optical cable manufacturing, in particular to a polyolefin plastic-coated optical fiber bundling process.
Background
Along with the implementation of the strategy of 'broadband China', the 'integration of three networks' and the construction are certainly and deeply developed, the communication construction brings more novel optical fiber application requirements, various novel wiring optical cables meeting the indoor wiring requirements are produced at the same time, and the application is more and more extensive. Indoor optical cables are required for the comprehensive wiring system of the intelligent building and the connection between the inside and the outside of the communication equipment. With the popularization of digital televisions, high-bandwidth multimedia applications, and the application of household information terminals, the demands of household digital equipment on communication capacity and bandwidth are continuously increased, so that the application of indoor optical cables has entered the comprehensive wiring era. The cable is limited by the product structure and manufacturing equipment of the conventional indoor optical cable, and the conventional indoor optical cable generally has fewer cores, so that the requirement of large-scale and large-capacity building wiring of users cannot be met. Based on these application requirements and application difficulties, it is highly desirable to develop a series of novel indoor wiring optical cables based on micro-beam tube units.
Disclosure of Invention
The invention aims to solve the technical problem of providing a polyolefin plastic-coated optical fiber bundling process, and a novel indoor wiring optical cable based on a micro-bundle tube can be prepared according to the process, has a simple structure, light weight and small volume, and can meet the requirements of the use environment of large-scale large-capacity building wiring optical cables.
In order to solve the technical problem, the invention provides a polyolefin plastic-coated optical fiber bundling process, which comprises the following steps:
(1) n (n is more than or equal to 6 and less than or equal to 12) optical fibers are released through an optical fiber pay-off rack, and the optical fibers enter a stranding platform for reversing stranding after passing through an optical fiber branching die;
(2) positioning the stranded optical fiber bundle by an optical fiber positioning die, and then putting the optical fiber bundle into a powder applying box for applying powder;
(3) covering the powdered optical fiber bundle with a polyolefin sheath through an extruder, and sizing the sheath in a vacuumizing sizing device;
(4) and (3) after the sized plastic-coated optical fiber is shaped by cold and hot water treatment, sequentially entering a traction wheel and a tension wheel, and then taking up the optical fiber by a take-up system.
Further, in the step (1), the pay-off tension of the optical fiber pay-off rack is 60-100 g/way, preferably 80 g/way.
Further, in the step (1), n holes are uniformly distributed on the optical fiber branching die, the diameter of each hole is 0.4-0.8 mm, polishing treatment is carried out on the holes, and the center distance between the n holes is 8-15 mm.
Further, in the step (1), the twisting pitch is 400-600 mm, the twisting angle is 180 degrees, and the twisting direction is forward and reverse.
Further, in the step (3), the extrusion die is a tube extrusion type extrusion die, the outer diameter of the die core is 2.5-3.2 mm, and the inner diameter of the die sleeve is 3.5-4.5 mm; the extrusion temperature is 140-175 ℃.
Further, in the step (4), the sized plastic-coated optical fiber is subjected to first hot water treatment, wherein the temperature of the hot water is 40-55 ℃; then, a second cold water treatment is carried out, wherein the temperature of the cold water is 18-25 ℃.
Further, in the step (4), the tension of the tension pulley is required to be 3-8N, and is preferably 4N.
The invention has the beneficial effects that:
the polyolefin plastic-coated optical fiber bundling process provided by the invention takes polyolefin as a plastic-coated material, oil filling is not needed, the prepared plastic-coated optical fiber based on the micro-bundle tube can be used for indoor wiring optical cables, the structure is simple, the weight is light, the volume is small, the fiber capacity is high, the fiber can be easily stripped by bare hands, no tool is needed, and the requirements of the large-scale and large-capacity building wiring optical cable use environment can be met.
Drawings
FIG. 1 is a sectional view (1) and a side view (2) of an optical fiber branching mold used in example 1 of the present invention;
FIG. 2 is a sectional view of an optical fiber positioning mold used in example 1 of the present invention;
wherein: 110. a tapered cavity; 120. an aperture; 210. a tapered channel; 220. a channel is located.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
As described in the background art, the application of indoor optical cables has recently entered the era of integrated wiring, and the demand for indoor optical cables has proliferated. However, the conventional indoor optical cable is limited by the product structure and the manufacturing equipment of the conventional indoor optical cable, and the conventional indoor optical cable generally has a small number of cores, so that the requirement of large-scale and large-capacity building wiring of users cannot be met.
Aiming at the technical problem, the invention provides a polyolefin plastic-coated optical fiber bundling process, and a novel indoor wiring optical cable based on a micro-beam tube unit is prepared by the process.
Specifically, the process flow of the polyolefin plastic-coated optical fiber bundling process is as follows:
(1) firstly, n (n is more than or equal to 6 and less than or equal to 12) optical fibers are paid out through an optical fiber pay-off rack, and the optical fibers enter a stranding platform for reversing stranding after passing through an optical fiber branching die;
(2) positioning the stranded optical fiber bundle by an optical fiber positioning die, and then putting the optical fiber bundle into a powder applying box for applying powder;
(3) covering the powdered optical fiber bundle with a polyolefin sheath through an extruder, and sizing the sheath in a vacuumizing sizing device;
(4) and (3) after the sized plastic-coated optical fiber is shaped by cold and hot water treatment, sequentially entering a traction wheel and a tension wheel, and then taking up the optical fiber by a take-up system.
In the step (1), the pay-off tension of the optical fiber pay-off rack is 60-100 g/way, preferably 80 g/way.
Fig. 1 shows a schematic structural diagram of an optical fiber branching mold used in embodiment 1, where tapered cavities 110 are formed on both front and rear end faces of the optical fiber branching mold, 12 through holes 120 are formed in a bottom surface of the tapered cavity 110, the 12 holes 120 have a diameter of 0.5mm and are uniformly distributed around a center, polishing is performed in the holes 120, and a center distance between the 12 holes 120 is 10 mm. After the multiple paths of optical fibers released by the optical fiber pay-off rack sequentially pass through the corresponding holes 120 on the branching die, each path of optical fiber is uniformly distributed around the center, so that the optical fibers are biased to be twisted subsequently.
In the invention, the stranding pitch is 400-600 mm, preferably 600 mm; the twisting angle is 180 degrees, and the twisting direction is positive and negative.
Fig. 2 is a schematic structural view showing an optical fiber positioning mold used in embodiment 1, in which a tapered passage 210 is formed at both rear end faces and a cylindrical positioning passage 220 communicating with the tapered passage 210 is formed at the front end face. The twisted fiber bundle enters the mold through the tapered channel 210 and passes through the positioning channel 220, where the fiber bundle is positioned.
Then, the optical fiber bundle enters a powder coating box for coating, the coating treatment can prevent the optical fibers from being adhered, and meanwhile, the water blocking effect can be achieved.
In the invention, the extrusion die is a tube extrusion type extrusion die, the outer diameter of a die core is 2.5-3.2 mm, and the inner diameter of a die sleeve is 3.5-4.5 mm; the extrusion temperature is 140-175 ℃.
After plastic sheathing, the sheath enters a vacuumizing sizing device to size the sheath, and the vacuumizing treatment can ensure that the sheath becomes round.
Carrying out first hot water treatment on the sized plastic-coated optical fiber, wherein the temperature of the hot water is 40-55 ℃; then, a second cold water treatment is carried out, wherein the temperature of the cold water is 18-25 ℃.
In the invention, the tension requirement of the tension wheel during take-up is 3-8N, and 4N is preferred.
Example 1
The embodiment provides a polyolefin plastic-coated optical fiber bundling process, which comprises the following process flows:
a12-path G.657A2 colored optical fiber is paid out by an active pay-off rack, the pay-off tension is 80 g/path, the optical fiber enters a twisting table after passing through an optical fiber branching die, and the twisting table is used for reversing and twisting, the twisting pitch is 600mm, the twisting angle is 180 degrees, and the twisting direction is positive and negative. The stranded optical fiber bundle is positioned by an optical fiber positioning die, then enters a powdering box for smearing, and then enters an extrusion machine head for extrusion molding, wherein the extrusion die is of a tube extrusion type, the outer diameter of a die core is 2.7mm, the outer diameter of a die sleeve is 4.0mm, the extrusion material is a polyolefin material, and the extrusion temperature is 140-175 ℃. After plastic sheathing, the plastic enters a vacuumizing sizing device, and the inner diameter of a sizing die is 1.30 mm. Firstly, performing first hot water treatment on the sized plastic-sheathed optical fiber, wherein the temperature of the hot water is 45 ℃; then, a second cold water treatment is carried out, wherein the temperature of the cold water is 20 ℃. And (4) after the sheath is shaped, the sheath enters a traction wheel, after traction, the sheath enters a tension wheel, the tension is 4N, and finally the sheath enters a take-up system to take up the wire, so that the production is finished.
By the process of the embodiment, the plastic-coated optical fiber with the outer diameter of 1.3mm and the inner diameter of 1.05mm can be obtained, and 12 optical fibers are arranged in the tube.
The plastic-coated optical fiber bundling process of the embodiment takes polyolefin as a plastic-coated material, oil filling is not needed, the prepared plastic-coated optical fiber based on the micro-bundle tube can be used for indoor wiring optical cables, and the plastic-coated optical fiber bundling process is simple in structure, light in weight, small in size, high in fiber capacity, easy to strip, free of any tool and capable of meeting the requirements of the use environment of large-scale large-capacity building wiring optical cables.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (7)
1. A bundling process for polyolefin plastic-coated optical fibers is characterized by comprising the following steps:
(1) n (n is more than or equal to 6 and less than or equal to 12) optical fibers are released through an optical fiber pay-off rack, and the optical fibers enter a stranding platform for reversing stranding after passing through an optical fiber branching die;
(2) positioning the stranded optical fiber bundle by an optical fiber positioning die, and then putting the optical fiber bundle into a powder applying box for applying powder;
(3) covering the powdered optical fiber bundle with a polyolefin sheath through an extruder, and sizing the sheath in a vacuumizing sizing device;
(4) and (3) after the sized plastic-coated optical fiber is shaped by cold and hot water treatment, sequentially entering a traction wheel and a tension wheel, and then taking up the optical fiber by a take-up system.
2. A process for bundling polyolefin overmolding optical fibers according to claim 1, wherein in step (1), the paying-off tension is 60 to 100 g/path.
3. The polyolefin overmolding optical fiber bundling process of claim 1, wherein in the step (1), n holes are uniformly distributed on the optical fiber branching die, the diameter of the holes is 0.4-0.8 mm, the holes are polished, and the center distance of the n holes is 8-15 mm.
4. The polyolefin overmolding optical fiber bundling process of claim 1, wherein in step (1), the stranding pitch is 400-600 mm, the stranding angle is 180 °, and the stranding direction is forward and reverse.
5. The polyolefin overmolding optical fiber bundling process of claim 1, wherein in step (3), the extrusion die is a tube extrusion die, the outer diameter of the die core is 2.5-3.2 mm, and the inner diameter of the die sleeve is 3.5-4.5 mm; the extrusion temperature is 140-175 ℃.
6. The polyolefin overmolded optical fiber bundling process of claim 1, wherein in step (4), the sized overmolded optical fiber is subjected to a first hot water treatment at a temperature of 40 to 55 ℃; then, a second cold water treatment is carried out, wherein the temperature of the cold water is 18-25 ℃.
7. The polyolefin overmolding fiber bundling process of claim 1, wherein in step (4), the tension of said tension pulley is required to be 3-8N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201929.XA CN110794544A (en) | 2019-11-29 | 2019-11-29 | Bundling process for polyolefin plastic-coated optical fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201929.XA CN110794544A (en) | 2019-11-29 | 2019-11-29 | Bundling process for polyolefin plastic-coated optical fibers |
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| CN110794544A true CN110794544A (en) | 2020-02-14 |
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| CN201911201929.XA Pending CN110794544A (en) | 2019-11-29 | 2019-11-29 | Bundling process for polyolefin plastic-coated optical fibers |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101061407A (en) * | 2004-09-27 | 2007-10-24 | 普雷斯曼电缆及系统能源有限公司 | Anti-water optical cable and making method |
| CN207301424U (en) * | 2017-09-08 | 2018-05-01 | 长飞光纤光缆股份有限公司 | A kind of continuously adjustable device of vacuum for micro- cable production |
| CN108363152A (en) * | 2018-01-26 | 2018-08-03 | 西安西古光通信有限公司 | A kind of inserted rodent-resistant cable of nonmetallic yarn and preparation method thereof |
| CN207859433U (en) * | 2017-12-31 | 2018-09-14 | 上海千一光纤光缆设备有限公司 | Tightly packaged fiber extruding production line |
| CN108859052A (en) * | 2018-05-03 | 2018-11-23 | 烽火通信科技股份有限公司 | Dry-type fiber loose tube production equipment, production method and Dry-type fiber loose tube |
-
2019
- 2019-11-29 CN CN201911201929.XA patent/CN110794544A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101061407A (en) * | 2004-09-27 | 2007-10-24 | 普雷斯曼电缆及系统能源有限公司 | Anti-water optical cable and making method |
| CN207301424U (en) * | 2017-09-08 | 2018-05-01 | 长飞光纤光缆股份有限公司 | A kind of continuously adjustable device of vacuum for micro- cable production |
| CN207859433U (en) * | 2017-12-31 | 2018-09-14 | 上海千一光纤光缆设备有限公司 | Tightly packaged fiber extruding production line |
| CN108363152A (en) * | 2018-01-26 | 2018-08-03 | 西安西古光通信有限公司 | A kind of inserted rodent-resistant cable of nonmetallic yarn and preparation method thereof |
| CN108859052A (en) * | 2018-05-03 | 2018-11-23 | 烽火通信科技股份有限公司 | Dry-type fiber loose tube production equipment, production method and Dry-type fiber loose tube |
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Application publication date: 20200214 |
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