CN111025508A - Optical cable, double-core optical cable and double-core optical cable forming die - Google Patents
Optical cable, double-core optical cable and double-core optical cable forming die Download PDFInfo
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- CN111025508A CN111025508A CN201911423785.2A CN201911423785A CN111025508A CN 111025508 A CN111025508 A CN 111025508A CN 201911423785 A CN201911423785 A CN 201911423785A CN 111025508 A CN111025508 A CN 111025508A
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- optical cable
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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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- 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
- G02B6/4432—Protective covering with fibre reinforcements
-
- 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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention provides an optical cable, a double-core optical cable and a double-core optical cable forming die, relates to the technical field of communication optical cable structures, and aims to solve the technical problem that communication quality is affected due to the fact that optical fibers are easy to deform or even break when the optical cable is pressed in the prior art. The invention provides an optical cable, comprising: an optical fiber, a strength member, and a jacket; the optical fiber and the reinforcing piece are both arranged in the sheath in a penetrating way and are arranged at intervals; the cross section of the sheath is in a water drop shape, the optical fiber is positioned at one end with a larger cross section area of the sheath, and the reinforcing piece is positioned at one end with a smaller cross section area of the sheath. The invention also provides a double-core optical cable which comprises two optical cables; the two sheaths of the two optical cables are fixedly connected. The invention also provides a double-core optical cable forming die which is used for forming the double-core optical cable; the double-core optical cable forming die comprises a die sleeve and a die core matched with the die sleeve for use.
Description
Technical Field
The invention relates to the technical field of communication optical cable structures, in particular to an optical cable, a double-core optical cable and a double-core optical cable forming die.
Background
With the development of society and the continuous progress of communication technology, optical fiber communication technology stands out from optical communication, becomes an important part of modern communication technology, and plays a very important role in modern telecommunication networks. The optical fiber communication has the characteristics of large communication capacity, long transmission distance, electromagnetic interference resistance, good transmission quality, good confidentiality and convenience in laying.
Optical fiber cables, which are one of the necessary hardware conditions for optical fiber communications, are mainly composed of optical fibers (thin glass filaments such as hair), plastic protective sleeves and plastic sheaths. The optical cable is a communication line which is formed by a certain number of optical fibers into a cable core in a certain mode, is externally coated with a sheath, and is also coated with an outer protective layer for realizing optical signal transmission.
To build an all-fiber network, indoor optical cables of various structures are needed to connect and redistribute the optical fiber network, which means that a large number of indoor optical cables need to be laid in banquet halls, hospitality halls and various large indoor places. When the existing double-core splayed core cable is laid under a carpet in a hall, the optical fiber is easily distorted and deformed due to artificial or heavy pressure, the optical fiber is seriously broken, and the communication quality is influenced.
Disclosure of Invention
The invention aims to provide an optical cable, a double-core optical cable and a double-core optical cable forming die, which aim to solve the technical problem that the communication quality is affected because optical fibers are easy to deform or even break when the optical cable is pressed in the prior art.
The invention provides an optical cable, comprising: an optical fiber, a strength member, and a jacket.
The optical fiber and the reinforcing piece are arranged in the sheath in a penetrating mode and are arranged at intervals.
The cross section of the sheath is in a water drop shape, the optical fiber is positioned at one end of the sheath with a larger cross section area, and the reinforcing piece is positioned at one end of the sheath with a smaller cross section area.
Furthermore, the sheath is provided with a first cavity and a second cavity which is arranged at an interval with the first cavity, the first cavity is arranged at one end of the sheath with a larger cross-sectional area, and the second cavity is arranged at one end of the sheath with a smaller cross-sectional area.
The optical fiber penetrates through the first cavity, and the reinforcing piece penetrates through the second cavity.
Further, the sheath is made of low-smoke halogen-free materials.
Further, the reinforcing element is selected from a soft reinforcing element or a hard reinforcing element.
Further, the optical fiber is a bare optical fiber or a tight-buffered optical fiber.
The invention also provides a double-core optical cable which comprises two optical cables.
And the two sheaths of the two optical cables are fixedly connected.
Further, one end of the sheath of one of the two optical cables having a larger cross-sectional area is fixedly connected with one end of the sheath of the other optical cable having a larger cross-sectional area.
Further, the two sheaths are integrally extruded.
The invention also provides a double-core optical cable forming die which is used for forming the double-core optical cable.
The double-core optical cable forming die comprises a die sleeve and a die core matched with the die sleeve for use.
Further, the mold core has first reinforcement hole, first optic fibre hole, second optic fibre hole and the second reinforcement hole that sets up in proper order at interval.
The die sleeve is provided with a first die cavity and a second die cavity communicated with the first die cavity, and the cross sections of the first die cavity and the second die cavity are both in a water drop shape;
and the mold core is arranged at the upstream of the mold sleeve along the extrusion direction of the double-core optical cable.
The optical cable, the double-core optical cable and the double-core optical cable forming die provided by the invention have the beneficial effects that:
the invention provides an optical cable, comprising: an optical fiber, a strength member, and a jacket; the optical fiber and the reinforcing piece are both arranged in the sheath in a penetrating way and are arranged at intervals; the cross section of the sheath is in a water drop shape, the optical fiber is positioned at one end with a larger cross section area of the sheath, and the reinforcing piece is positioned at one end with a smaller cross section area of the sheath.
In the structure, the tensile strength of the optical cable in the length direction is effectively enhanced by the reinforcing piece, so that the optical fiber is prevented from being broken due to the pulling force.
The optical fiber and the reinforcing piece are arranged at intervals, and by utilizing the structure, when the optical cable is subjected to external pressure, the optical fiber and the reinforcing piece are prevented from being extruded and rubbed, so that the optical fiber is prevented from being deformed or broken due to friction; in addition, the optical fiber and the reinforcing piece are arranged at intervals, when the sheath deforms under pressure, the optical fiber can displace along with the deformation of the sheath, so that the effect of buffering and dispersing pressure is achieved, and the pressure on the optical fiber is reduced.
The cross section of the sheath is in a water drop shape, the optical fiber is positioned at one end with the larger cross section area of the sheath, and the distance between the outer wall of the sheath at the end with the larger cross section area of the sheath and the optical fiber is far, so that the end with the larger cross section area of the sheath has a larger buffer area.
Compared with the structure that the optical fiber is easily deformed or even broken when being pressed in the optical cable in the prior art, the structure is utilized to buffer and disperse the pressure applied to the optical cable, so that the pressure applied to the optical fiber is effectively reduced, and the deformation and the breakage of the optical fiber due to the pressure friction are avoided. Therefore, the technical problem that in the prior art, the optical cable is pressed, and the optical fiber is easy to deform or even break, so that the communication quality is affected is solved.
The invention provides a double-core optical cable, which comprises two optical cables; the two sheaths of the two optical cables are fixedly connected.
The two sheaths are fixedly connected, and each sheath is provided with an optical fiber and a reinforcing piece to form the double-core optical cable. Therefore, the advantages of the dual-core optical cable have the advantages of the optical cable and are not described in detail.
The double-core optical cable forming die is used for forming the double-core optical cable; the double-core optical cable forming die comprises a die sleeve and a die core matched with the die sleeve for use.
In the structure, the mold core and the mold sleeve are used in a matched mode to form the dual-core optical cable, and the dual-core optical cable formed by the mold core and the mold sleeve has the advantages of the dual-core optical cable and is not repeated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a jacket of an optical cable according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a two-core optical cable according to an embodiment of the present invention;
fig. 3 is one of schematic structural diagrams of a two-core optical cable forming mold according to an embodiment of the present invention;
fig. 4 is a second schematic structural view of a dual-core optical cable forming mold according to an embodiment of the present invention;
fig. 5 is a schematic view of an operating state of a dual-core optical cable forming mold according to an embodiment of the present invention.
Icon: 100-a sheath; 110 — a first cavity; 120-a second cavity; 130-a second buffer area; 140-a first buffer area; 200-an optical fiber; 300-a reinforcement; 400-die sleeve; 410-a first mold cavity; 420-a second mold cavity; 500-mold core; 510-a first stiffener hole; 520-a first fiber hole; 530-a second fiber hole; 540-second stiffener hole; 600-injection molding of the cavity shell.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first" and "second" are used in the description of the present invention for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "connected" and "attached" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be directly connected or connected through an intermediate medium; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
The specific structure is shown in fig. 1-5.
The optical cable provided by the present embodiment, as shown in fig. 1, fig. 2 and fig. 5, includes: optical fiber 200, strength member 300, and jacket 100.
The optical fiber 200 and the strength member 300 are disposed in the sheath 100 at an interval.
The cross-section of the jacket 100 is in the shape of a drop, with the optical fiber 200 at the end of the jacket 100 having a larger cross-sectional area and the strength member 300 at the end of the jacket 100 having a smaller cross-sectional area.
In the above structure, the strength member 300 is provided to effectively reinforce the tensile strength in the length direction of the optical cable, thereby preventing the optical fiber 200 from being broken by a pulling force.
The optical fiber 200 and the reinforcing member 300 are arranged at intervals, and by the structure, when the optical cable is subjected to external pressure, the optical fiber 200 and the reinforcing member 300 are prevented from being extruded and rubbed, so that the optical fiber 200 is prevented from being deformed or broken due to friction; in addition, the optical fiber 200 and the reinforcing member 300 are spaced apart from each other, and when the sheath 100 is deformed by pressure, the optical fiber 200 can be displaced in the horizontal direction along with the deformation of the sheath 100, thereby achieving the effect of buffering and dispersing pressure, and further reducing the pressure applied to the optical fiber 200.
The cross section of the sheath 100 is in a drop shape, the optical fiber 200 is located at the end with the larger cross section area of the sheath 100, and the distance between the outer wall of the sheath 100 and the optical fiber 200 is longer at the end with the larger cross section area of the sheath 100, so that the end with the larger cross section area of the sheath 100 is provided with the second buffer region 130 with the larger area, when the sheath 100 is pressed, the pressure on the optical fiber 200 is reduced by using the second buffer region 130 at the end of the sheath 100, and the optical fiber 200 is prevented from being deformed or broken due to the overlarge pressure.
Compared with the structure that the optical fiber 200 is easy to deform or even break under pressure in the optical cable in the prior art, the structure is utilized to buffer and disperse the pressure applied to the optical cable, so that the pressure applied to the optical fiber 200 is effectively reduced, and the optical fiber 200 is prevented from deforming and breaking due to pressure friction. Therefore, the technical problem that in the prior art, the optical fiber 200 is easy to deform or even break due to the compression of the optical cable, so that the communication quality is affected is solved.
In an alternative technical solution of this embodiment, referring mainly to fig. 1 and fig. 2, the sheath 100 has a first cavity 110 and a second cavity 120 spaced apart from the first cavity 110, the first cavity 110 is opened at one end of the sheath 100 with a larger cross-sectional area, and the second cavity 120 is opened at one end of the sheath 100 with a smaller cross-sectional area.
The optical fiber 200 is disposed through the first cavity 110, and the strength member 300 is disposed through the second cavity 120.
Preferably, the first cavity 110 and the second cavity 120 of the sheath 100 are arranged at an interval, the first buffer area 140 is arranged between the first cavity 110 and the second cavity 120, the optical fiber 200 is arranged in the first cavity 110 in a penetrating manner, the reinforcement 300 is arranged in the second cavity 120 in a penetrating manner, when the sheath 100 is pressed, the sheath 100 deforms, and the first buffer area 140 between the first cavity 110 and the second cavity 120 deforms, so that the optical fiber 200 and the reinforcement 300 displace to absorb a part of pressure, and further reduce the pressure applied to the optical fiber 200; in addition, the first cavity 110 and the second cavity 120 are spaced apart from each other, so that the optical fiber 200 is isolated from the strength member 300, and the optical fiber 200 is prevented from being pressed and rubbed against the strength member 300.
The first cavity 110 is opened at the end of the sheath 100 having a larger cross-sectional area, the end of the sheath 100 having a larger cross-sectional area has a second buffer region 130 having a larger area, and the first cavity 110 is opened at the end of the sheath 100 having a larger cross-sectional area, so that the second buffer region 130 is disposed around the optical fiber 200. When the sheath 100 is compressed, the second buffer region 130 is compressed and deformed to absorb a part of the pressure, thereby performing a buffering function to reduce the pressure applied to the optical fiber 200.
In an optional technical solution of this embodiment, the sheath 100 is formed by processing a low-smoke halogen-free material.
Preferably, the sheath 100 is formed by processing a low-smoke halogen-free material, which is an environment-friendly material that does not contain halogen (fluorine, chlorine, bromine, iodine, astatine), lead, cadmium, chromium, mercury, and the like, and does not emit toxic smoke when burning. Has the advantages of difficult ignition and the capability of preventing flame from spreading. Specifically, the low-smoke halogen-free flame-retardant polyolefin material can be selected, and in addition, the thermoplastic low-smoke halogen-free flame-retardant polyolefin material is processed into the thermosetting irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin material through an irradiation crosslinking technology, so that the temperature resistance, wear resistance, mechanical property, oil resistance and other properties of the material are improved.
In addition, the sheath 100 may also be formed by using a PVC (Polyvinyl chloride) material, and the PVC material has high tensile strength and elongation at break, so that the sheath 100 formed by using the PVC material has high tensile strength. The PVC material extrusion molding efficiency is higher, and the sheath 100 extrusion molding is convenient, so that the processing efficiency is improved.
In an alternative embodiment of this embodiment, the reinforcing member 300 is a soft reinforcing member or a hard reinforcing member.
Specifically, the soft reinforcing member is formed by processing aramid fibers or glass fiber yarns, and the optical cable has good bending performance by utilizing the good bending performance of the soft reinforcing member.
The hard stiffeners include non-metallic hard stiffeners and metallic hardware. The non-metal hard reinforcing part is made of fiber reinforced composite material, and the fiber reinforced composite material is formed by winding, molding or pultrusion of reinforced fiber material, such as glass fiber, carbon fiber, aramid fiber and the like, and matrix material. Preferably, any one of a glass fiber reinforced composite (GFRP), a carbon fiber reinforced Composite (CFRP) and an aramid fiber reinforced composite (AFRP) is used. The fiber reinforced composite material has the characteristics of high specific strength, large specific modulus, good corrosion resistance and good durability.
Preferably, the strength member 300 adopts the soft strength member and the non-metal hard strength member, so that the production cost is reduced, the problem of iron oxidation and hydrogen evolution does not exist, the low-temperature performance of the optical cable is excellent, and the optical cable can be prevented from being struck by lightning when being used in a multi-thunder area.
In an optional technical solution of this embodiment, the optical fiber 200 is a bare fiber or a tight-buffered fiber.
Specifically, the sheath 100 may be directly sleeved on the outer side of the bare fiber, and the bare fiber may be directly used to form a communication channel for data information transmission. In addition, the sheath 100 may be sleeved outside the tight-buffered optical fiber to form a communication channel for data information transmission, the tight-buffered optical fiber is a single-mode or multi-mode optical fiber having a tight-buffered secondary coating structure, and the coating structure is made of any one of an environmentally-friendly flame-retardant polyvinyl chloride material, an environmentally-friendly low-smoke halogen-free flame-retardant polyolefin material, and an environmentally-friendly polyurethane material. The tight-buffered optical fiber has the characteristics of softness, easy stripping, small bending radius and good mechanical property.
The present embodiment also provides a two-core cable, mainly referring to fig. 2, comprising two of the above cables.
The two jackets 100 of the two cables are fixedly connected.
In the above structure, two sheaths 100 are fixedly connected, and one optical fiber 200 and one strength member 300 are disposed in each sheath 100, thereby forming a dual core optical cable. With this structure, after the dual-core optical cable is compressed, under the buffer action of the two sheaths 100, the pressure applied to the two optical fibers 200 is reduced, and there is no friction between the two optical fibers 200 and the strength member 300, thereby avoiding the deformation and breakage of the optical fibers 200.
In an alternative embodiment of this embodiment, referring mainly to fig. 2, one end of the sheath 100 of one of the two optical cables having a larger cross-sectional area is fixedly connected to the other end of the sheath 100 having a larger cross-sectional area.
Preferably, the ends of the two sheaths 100 with the larger cross-sectional areas are fixedly connected, and with the structure, when the dual-core optical cable is pressed, the ends of the two sheaths 100 with the larger cross-sectional areas are pressed to deform, so that the area of the pressed surface is increased, the pressure of the pressed surface is reduced, and the effect of buffering and dispersing the pressure is further achieved. Meanwhile, if the double-core optical cable is laid at the bottom of the carpet, when a person steps on the double-core optical cable, the contact area between the sole and the double-core optical cable is large, the pressure is small, and therefore people feel small in foreign body sensation.
It should be noted that, according to experiments, the short-time flattening performance of the dual-core optical cable can reach 3000N/100mm, the long-time flattening performance can reach 1500N/100mm, and the strain and attenuation of the optical fiber are not obviously changed after the force is removed. The flattening performance of the dual-core optical cable is far superior to that of the dual-core optical cable in the prior art.
In an alternative embodiment of this embodiment, the two sheaths 100 are integrally extruded.
Specifically, the two sheaths 100 are integrally extrusion-molded using a twin-core cable molding die and an extruder, thereby improving the processing efficiency.
The embodiment also provides a dual-core optical cable forming mold, mainly referring to fig. 3-5, for forming the dual-core optical cable.
The dual-core optical cable molding die comprises a die sleeve 400 and a die core 500 matched with the die sleeve 400.
Preferably, the fused sheath material is coated outside the optical fiber 200 and the reinforcing member 300, and the fused sheath material coated outside the optical fiber 200 and the reinforcing member 300 is extruded and molded by using a dual-core cable molding die, so that the dual-core cable is directly molded, secondary assembly of the optical fiber 200, the reinforcing member 300 and the sheath 100 is avoided in the process, the processing procedures are reduced, and the processing efficiency is improved.
In an alternative technical solution of this embodiment, referring mainly to fig. 3-5, the mold core 500 has a first strength member hole 510, a first optical fiber hole 520, a second optical fiber hole 530, and a second strength member hole 540 that are sequentially disposed at intervals.
The die case 400 has a first die cavity 410 and a second die cavity 420 communicating with the first die cavity 410, and the first die cavity 410 and the second die cavity 420 each have a water drop shape in cross section.
The mold core 500 is disposed upstream of the mold housing 400 in the extrusion direction of the two-core optical cable.
Specifically, the first strength member holes 510, the first optical fiber holes 520, the second optical fiber holes 530 and the second strength member holes 540 of the mold core 500 are sequentially arranged at intervals and are respectively used for penetrating the strength members 300, the optical fibers 200 and the strength members 300, and by using the above structure, the two optical fibers 200 and the two strength members 300 in the dual-core optical cable are arranged at intervals according to the sequence of the strength members 300, the optical fibers 200 and the strength members 300.
The mold core 500 is disposed upstream of the mold sleeve 400 in the extrusion direction of the two-core optical cable, preferably, the mold core 500 is connected upstream of the injection cavity housing 600, the mold sleeve 400 is connected downstream of the injection cavity housing 600, after the two optical fibers 200 and the two strength members 300 pass through the mold core 500, the molten material of the jacket 100 is pressure-injected into the injection cavity housing 600 so as to be coated outside the optical fibers 200 and the strength members 300, and then the optical fibers 200 and the strength members 300 coated with the molten material of the jacket 100 are inserted into the first mold cavity 410 and the second mold cavity 420 of the mold sleeve, and the two connected jackets having a water drop shape in cross section of the two-core optical cable can be extruded by using the water drop shape of the first mold cavity 410 and the second mold cavity 420.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An optical cable, comprising: an optical fiber (200), a strength member (300), and a jacket (100);
the optical fiber (200) and the reinforcing piece (300) are arranged in the sheath (100) in a penetrating way and are arranged at intervals;
the cross section of the sheath (100) is in a water drop shape, the optical fiber (200) is positioned at one end of the sheath (100) with a larger cross section, and the reinforcing piece (300) is positioned at one end of the sheath (100) with a smaller cross section.
2. Optical cable according to claim 1, characterized in that the sheath (100) has a first cavity (110) and a second cavity (120) arranged spaced from the first cavity (110), the first cavity (110) opening at the end of the sheath (100) having the larger cross-sectional area and the second cavity (120) opening at the end of the sheath (100) having the smaller cross-sectional area;
the optical fiber (200) is arranged in the first cavity (110) in a penetrating mode, and the reinforcing piece (300) is arranged in the second cavity (120) in a penetrating mode.
3. Optical cable according to claim 1 or 2, characterized in that said sheath (100) is shaped in a low smoke zero halogen material.
4. Optical cable according to claim 1 or 2, characterized in that said strength members (300) are selected from soft strength members or hard strength members.
5. Optical cable according to claim 1 or 2, characterized in that the optical fiber (200) is a bare fiber or a tight-buffered fiber.
6. A two-core optical cable comprising two optical cables according to any one of claims 1 to 5;
the two sheaths (100) of the two optical cables are fixedly connected.
7. A twin-core optical cable according to claim 6, characterised in that the end of the sheath (100) of one of the two optical cables having the larger cross-sectional area is fixedly connected to the end of the sheath (100) of the other having the larger cross-sectional area.
8. A twin-core optical cable according to claim 7, characterised in that the two sheaths (100) are integrally extruded.
9. A twin-core optical cable molding die for molding the twin-core optical cable according to any one of claims 6 to 8;
the double-core optical cable forming die comprises a die sleeve (400) and a die core (500) matched with the die sleeve (400).
10. The mold for molding a dual-core optical cable according to claim 9, wherein the mold core (500) has a first strength member hole (510), a first optical fiber hole (520), a second optical fiber hole (530), and a second strength member hole (540) arranged at intervals in sequence;
the die sleeve (400) is provided with a first die cavity (410) and a second die cavity (420) communicated with the first die cavity (410), and the cross sections of the first die cavity (410) and the second die cavity (420) are in the shape of water drops;
the mold core (500) is disposed upstream of the mold sleeve (400) in an extrusion direction of the two-core optical cable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911423785.2A CN111025508A (en) | 2019-12-31 | 2019-12-31 | Optical cable, double-core optical cable and double-core optical cable forming die |
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| CN201911423785.2A CN111025508A (en) | 2019-12-31 | 2019-12-31 | Optical cable, double-core optical cable and double-core optical cable forming die |
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| CN111025508A true CN111025508A (en) | 2020-04-17 |
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| CN201911423785.2A Pending CN111025508A (en) | 2019-12-31 | 2019-12-31 | Optical cable, double-core optical cable and double-core optical cable forming die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113534370A (en) * | 2021-06-16 | 2021-10-22 | 华为技术有限公司 | Optical cable |
| KR102378731B1 (en) * | 2020-10-22 | 2022-03-28 | 한국건설기술연구원 | Drop confirming system for adhesional reinforcement under structure using 3-wire optical fiber, and method for the same |
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| CN208861033U (en) * | 2018-11-06 | 2019-05-14 | 德阳汇川科技有限公司 | A kind of novel double-core optical cable |
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| CN103676053A (en) * | 2013-12-09 | 2014-03-26 | 河南省通信电缆有限公司郑州分公司 | Double-core optical cable |
| CN207799195U (en) * | 2018-02-13 | 2018-08-31 | 德阳汇川科技有限公司 | Inside cable under a kind of novel double-core flat blanket |
| CN208689218U (en) * | 2018-08-08 | 2019-04-02 | 天津市尚德电缆科技有限公司 | A kind of water-drop-shaped twin fiber cable |
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| KR102378731B1 (en) * | 2020-10-22 | 2022-03-28 | 한국건설기술연구원 | Drop confirming system for adhesional reinforcement under structure using 3-wire optical fiber, and method for the same |
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| CN113534370B (en) * | 2021-06-16 | 2022-10-04 | 华为技术有限公司 | Optical cable |
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Application publication date: 20200417 |
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| RJ01 | Rejection of invention patent application after publication |