CN113548796B - Optical fiber perform's deposition equipment - Google Patents
Optical fiber perform's deposition equipment Download PDFInfo
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- CN113548796B CN113548796B CN202110926580.7A CN202110926580A CN113548796B CN 113548796 B CN113548796 B CN 113548796B CN 202110926580 A CN202110926580 A CN 202110926580A CN 113548796 B CN113548796 B CN 113548796B
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- deposition
- optical fiber
- hole
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- belt
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01413—Reactant delivery systems
- C03B37/0142—Reactant deposition burners
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/66—Relative motion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The application discloses an optical fiber perform deposition device, a machine tool; the two chucks are oppositely arranged and are arranged in the machine tool; the upper end of the hollow deposition box is provided with an opening and is arranged below the two chucks; two driving wheels rotatably mounted inside the deposition box; the transmission belt is positioned in the deposition box, the upper part of the transmission belt is horizontally arranged, the horizontal part of the transmission belt shields the opening of the deposition box, and the upper part of the transmission belt is provided with a through hole; a servo motor; a fixing seat fixed with the deposition box; the blowtorch is arranged on the fixed seat in a sliding manner, a nozzle of the blowtorch is positioned at the inner side of the through hole or is level with the upper surface of the conveyor belt after penetrating through the through hole, and the blowtorch is fixed with the inner side of the conveyor belt; the lifting mechanism comprises a telescopic rod, and the telescopic rod is fixed with the deposition box; an outer diameter measuring device; and the controller is electrically connected with the outer diameter measuring equipment and the lifting mechanism. Compared with the existing structure, the blast burner has the advantages that the disturbance of the reciprocating movement of the blast burner to the space is greatly reduced, and the deposition quality of silicon dioxide particles is better.
Description
The application is a divisional application with application date of 2019, 07, 15 and application number of 2019106354816 and invented name of 'manufacturing process of optical fiber preform'.
Technical Field
The invention relates to the field of optical fiber preforms, in particular to a manufacturing process of an optical fiber preform.
Background
In the OVD method, a burner mixes silicon tetrachloride or octamethylcyclotetrasiloxane vapor gas with oxygen, and sprays the mixture together with hydrogen (or methane) and oxygen flame toward a rotating target rod, under the action of heat energy, the raw materials undergo hydrolysis reaction to generate silica, dust particles generated by pyrolysis of silica particles are adsorbed layer by layer on the rotating target rod passing through the flame to form a porous preform blank (also called loose body), and a drying agent (for example, chlorine) is introduced into the porous preform blank to remove impurities such as hydroxyl and the like at the temperature ranging from 1100 ℃ to 1550 ℃ to sinter the porous preform blank into a glass preform, and then the glass preform is drawn into an optical fiber.
When the outer cladding (loose body) of the optical fiber preform is manufactured by the existing OVD method, the blowtorch moves back and forth along the length direction of the core rod, the blowtorch is large in size, certain disturbance effect is generated on internal airflow during movement, and the deposition quality of silicon dioxide particles can be influenced.
Disclosure of Invention
The invention provides a manufacturing process of an optical fiber preform aiming at the problems.
The technical scheme adopted by the invention is as follows:
a process for manufacturing an optical fiber preform, comprising the steps of:
1) The two ends of the core rod are respectively welded with an auxiliary rod, the two auxiliary rods are respectively clamped on the two chucks, and the chucks drive the auxiliary rods and the core rod to rotate;
2) Arranging a conveyor belt below the core rod, wherein the conveyor belt is provided with a through hole, arranging a blast burner at the inner side of the conveyor belt and connecting the blast burner with the conveyor belt, and a nozzle of the blast burner is positioned at the inner side of the through hole or is flush with the upper surface of the conveyor belt after penetrating through the through hole;
3) Measuring the outer diameter of the loose body, and controlling a blast burner to move downwards amm when the outer diameter is increased by a mm;
4) Repeating the step 2) and the step 3) until the outer diameter of the loose body reaches a set value;
5) And sintering the prepared loose body to finally sinter the loose body into the optical fiber preform.
The nozzle of the blast burner is positioned on the inner side of the through hole or penetrates through the through hole to be flush with the upper surface of the conveyor belt, the conveyor belt works to drive the blast burner to move, compared with the existing structure, the disturbance of the reciprocating movement of the blast burner to the space is greatly reduced, and the deposition quality of silicon dioxide particles is better; through measuring the external diameter of loose body, when the external diameter increases a mm, control blast burner downstream amm, the blast burner moves down, can make the distance between blast burner lamp socket and the loose body remain unchanged basically, can effectively guarantee the deposition efficiency of silica granule.
In one embodiment of the present invention, in step 3), the movement of moving down the torch is performed when the torch moves to one end of the stroke.
Such as a torch, is moved back and forth between an a-side and a B-side, one end of the stroke being referred to as the a-side or the B-side.
In one embodiment of the present invention, the steps 1) to 4) are performed by a deposition apparatus, where the deposition apparatus includes:
a machine tool;
the two chucks are arranged oppositely, arranged in the machine tool and can synchronously rotate, and the two chucks are used for respectively clamping the auxiliary rods at the two ends of the core rod;
the upper end of the hollow deposition box is provided with an opening and is arranged below the two chucks;
the two driving wheels are rotatably arranged inside the deposition box;
the transmission belt is positioned in the deposition box and wound on the two transmission wheels, the upper part of the transmission belt is horizontally arranged, the horizontal part of the transmission belt shields the opening of the deposition box, and the upper part of the transmission belt is provided with a through hole;
the servo motor is used for driving one of the driving wheels to rotate in a reciprocating manner;
the fixing seat is fixed with the deposition box;
the blowtorch is arranged on the fixed seat in a sliding manner, a nozzle of the blowtorch is positioned at the inner side of the through hole or is flush with the upper surface of the conveyor belt after penetrating through the through hole, the blowtorch is fixed with the inner side of the conveyor belt, and the conveyor belt can drive the blowtorch to move in a reciprocating manner when moving in a reciprocating manner;
the lifting mechanism comprises a telescopic rod, and the telescopic rod is fixed with the deposition box and is used for driving the deposition box to slide up and down;
an outer diameter measuring device for measuring the outer diameter of the loose body;
and the controller is electrically connected with the outer diameter measuring equipment and the lifting mechanism and is used for controlling the working of the lifting mechanism according to the signal transmitted by the outer diameter measuring equipment.
The driving belt can adopt high temperature resistant material, in order to guarantee better thermal-insulated effect, can scribble at the surface of driving belt and establish thermal barrier coating.
In practice, the main body portion of the belt may be formed using a metal braid construction.
In one embodiment of the present invention, the driving wheel has a plurality of convex teeth uniformly distributed on the outer side thereof, and the driving belt has concave teeth matching with the convex teeth on the inner side thereof.
The cooperation of dogtooth and concave tooth can effectively prevent that the drive belt from skidding, guarantees accurate control blowtorch and removes.
In one embodiment of the present invention, the fixing base has a sliding slot, and the torch has a sliding block matching with the sliding slot.
In one embodiment of the present invention, the sliding groove is trapezoidal, T-shaped or dovetail-shaped, and the outer profile of the sliding block is adapted to the sliding groove.
In an embodiment of the invention, a gap is formed between the upper end of the torch and the through hole, and the deposition apparatus further includes a heat insulating sleeve, wherein the heat insulating sleeve is sleeved on the upper end of the torch and sleeved in the through hole.
The upper end temperature of the blast lamp is higher, and the driving belt is protected by effectively insulating heat through the heat insulation sleeve.
In one embodiment of the present invention, the heat insulation sleeve includes a hollow small diameter portion and a hollow large diameter portion, the small diameter portion extends into the through hole, and the large diameter portion abuts against the upper surface of the transmission belt.
In one embodiment of the present invention, the torch is fixed to the driving belt by an L-shaped connecting member, the L-shaped connecting member includes a horizontal portion and a vertical portion, the horizontal portion is fixed to the driving belt, and the vertical portion is fixed to a side wall of the torch.
In one embodiment of the invention, the lifting mechanism is arranged at the lower end of the machine tool, a telescopic rod of the lifting mechanism penetrates through the machine tool and is fixed with the lower end of the deposition box, and the lifting mechanism is a hydraulic cylinder or an electric push rod.
When the device is actually used, a ball screw pair structure can be adopted, and the adjustment of the up-and-down position can be realized through the accurate rotation of a screw.
The invention has the beneficial effects that: the nozzle of the blast lamp is positioned on the inner side of the through hole or penetrates through the through hole to be flush with the upper surface of the conveyor belt, the conveyor belt works to drive the blast lamp to move, compared with the existing structure, the disturbance of the reciprocating movement of the blast lamp on the space is greatly reduced, and the deposition quality of silicon dioxide particles is better; through measuring the external diameter of the loose body, when the external diameter increases a mm, the blowtorch is controlled to move am downwards, the blowtorch moves downwards, the distance between the blowtorch lamp socket and the loose body can be basically kept unchanged, and the deposition efficiency of silicon dioxide particles can be effectively ensured.
Description of the drawings:
FIG. 1 is a schematic view of a deposition apparatus;
FIG. 2 is a schematic view of the torch and belt positioned behind the deposition cartridge;
FIG. 3 is a schematic view of FIG. 2 with the outermost deposition cartridge removed.
The figures are numbered:
1. a core rod; 2. an auxiliary rod; 3. a chuck; 4. a machine tool; 5. a deposition cartridge; 6. an opening; 7. a driving wheel; 8. a transmission belt; 9. a through hole; 10. a fixed seat; 11. a blowtorch; 12. a lifting mechanism; 13. a telescopic rod; 14. an outer diameter measuring device; 15. a chute; 16. a slider; 17. a heat insulating sleeve; 18. a small diameter part; 19. a large diameter portion; 20. an L-shaped connector; 21. a horizontal portion; 22. a vertical portion.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings.
A process for manufacturing an optical fiber preform, comprising the steps of:
1) Respectively welding an auxiliary rod at two ends of the core rod, respectively clamping the two auxiliary rods on two chucks, and driving the auxiliary rods and the core rod to rotate by the chucks;
2) Arranging a conveyor belt below the core rod, wherein the conveyor belt is provided with a through hole, arranging a blast burner at the inner side of the conveyor belt and connecting the blast burner with the conveyor belt, and a nozzle of the blast burner is positioned at the inner side of the through hole or is flush with the upper surface of the conveyor belt after penetrating through the through hole;
3) Measuring the outer diameter of the loose body, and controlling a blast burner to move downwards amm when the outer diameter is increased by a mm;
4) Repeating the step 2) and the step 3) until the outer diameter of the loose body reaches a set value;
5) And sintering the prepared loose body to finally sinter the loose body into the optical fiber preform.
The nozzle of the blast lamp is positioned on the inner side of the through hole or penetrates through the through hole to be flush with the upper surface of the conveyor belt, the conveyor belt works to drive the blast lamp to move, compared with the existing structure, the disturbance of the reciprocating movement of the blast lamp on the space is greatly reduced, and the deposition quality of silicon dioxide particles is better; through measuring the external diameter of the loose body, when the external diameter increases a mm, the blowtorch is controlled to move am downwards, the blowtorch moves downwards, the distance between the blowtorch lamp socket and the loose body can be basically kept unchanged, and the deposition efficiency of silicon dioxide particles can be effectively ensured.
In this embodiment, in step 3), the movement of moving the torch downward is performed when the torch moves to one end of the stroke. Such as a torch, between an a-side and a B-side, one end of the stroke being referred to as the a-side or the B-side.
As shown in fig. 1, 2 and 3, the present embodiment further discloses a deposition apparatus for implementing steps 1) to 4) of the present embodiment, the deposition apparatus including:
a machine tool 4;
the two chucks 3 are oppositely arranged, arranged in the machine tool 4 and can synchronously rotate, and the two chucks 3 are used for respectively clamping the auxiliary rods 2 at two ends of the core rod 1;
a hollow deposition box 5 having an opening 6 at an upper end, the deposition box 5 being disposed below the two chucks 3;
two driving wheels 7 rotatably installed inside the deposition box 5;
the transmission belt 8 is positioned in the deposition box 5 and wound on the two transmission wheels 7, the upper part of the transmission belt 8 is horizontally arranged, the horizontal part 21 of the transmission belt 8 shields the opening 6 of the deposition box 5, and the upper part of the transmission belt 8 is provided with a through hole 9;
a servo motor (not shown in the figure) for driving one of the driving wheels 7 to rotate reciprocally;
a fixing seat 10 fixed with the deposition box 5;
the blowtorch 11 is arranged on the fixed seat 10 in a sliding mode, a nozzle of the blowtorch 11 is positioned on the inner side of the through hole 9 or penetrates through the through hole 9 to be flush with the upper surface of the conveyor belt, the blowtorch 11 is fixed with the inner side of the conveyor belt 8, and the conveyor belt 8 can drive the blowtorch 11 to move in a reciprocating mode when moving in a reciprocating mode;
the lifting mechanism 12 comprises a telescopic rod 13, and the telescopic rod 13 is fixed with the deposition box 5 and used for driving the deposition box 5 to slide up and down;
an outer diameter measuring device 14 for measuring the outer diameter of the loose body;
and the controller is electrically connected with the outer diameter measuring equipment 14 and the lifting mechanism 12 and is used for controlling the working of the lifting mechanism 12 according to the signals transmitted by the outer diameter measuring equipment 14.
The driving belt 8 can be made of high-temperature-resistant materials, and a heat-insulating coating can be coated on the outer surface of the driving belt 8 to ensure a better heat-insulating effect. In practice, the main body portion of the belt 8 may be formed using a metal braid structure.
In actual use, the outer side of the driving wheel 7 is provided with a plurality of convex teeth which are evenly distributed, and the inner side of the driving belt 8 is provided with concave teeth which are matched with the convex teeth. The cooperation of the convex teeth and the concave teeth can effectively prevent the driving belt 8 from slipping, and ensure the accurate control of the movement of the blowtorch 11.
As shown in fig. 3, the fixing base 10 has a sliding slot 15, and the torch 11 has a sliding block 16 engaged with the sliding slot 15. In this embodiment, the sliding slot 15 is trapezoidal, T-shaped or dovetail-shaped, and the outer profile of the sliding block 16 is adapted to the sliding slot 15.
As shown in fig. 1, 2 and 3, in the present embodiment, there is a gap between the upper end of the torch 11 and the through-hole 9, and the deposition apparatus further includes a heat insulating sleeve 17, the heat insulating sleeve 17 being externally fitted over the upper end of the torch 11 and internally fitted in the through-hole 9. The upper end temperature of the blast lamp 11 is higher, and the driving belt 8 can be effectively protected by arranging the heat insulation sleeve 17.
As shown in fig. 2, in the present embodiment, the heat insulating sleeve 17 includes a hollow small diameter portion 18 and a hollow large diameter portion 19, the small diameter portion 18 extends into the through hole 9, and the large diameter portion 19 abuts against the upper surface of the transmission belt 8.
As shown in fig. 1 and 3, in the present embodiment, the torch 11 is fixed to the belt 8 by an L-shaped coupling member 20, the L-shaped coupling member 20 includes a horizontal portion 21 and a vertical portion 22, the horizontal portion 21 is fixed to the belt 8, and the vertical portion 22 is fixed to a side wall of the torch 11.
As shown in fig. 1, in the present embodiment, the lifting mechanism 12 is disposed at the lower end of the machine tool 4, the telescopic rod 13 of the lifting mechanism 12 penetrates through the machine tool 4 and is fixed with the lower end of the depositing box 5, and the lifting mechanism 12 is a hydraulic cylinder or an electric push rod. In practical use, the ball screw pair structure can be adopted, and the adjustment of the upper position and the lower position can be realized through the accurate rotation of the screw.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.
Claims (8)
1. An apparatus for depositing an optical fiber preform, comprising:
a machine tool;
the two chucks are arranged oppositely, arranged in the machine tool and can synchronously rotate, and the two chucks are used for respectively clamping the auxiliary rods at the two ends of the core rod;
the upper end of the hollow deposition box is provided with an opening and is arranged below the two chucks;
the two driving wheels are rotatably arranged inside the deposition box;
the transmission belt is positioned in the deposition box and wound on the two transmission wheels, the upper part of the transmission belt is horizontally arranged, the horizontal part of the transmission belt shields the opening of the deposition box, and the upper part of the transmission belt is provided with a through hole;
the servo motor is used for driving one of the driving wheels to rotate in a reciprocating manner;
the fixing seat is fixed with the deposition box;
the blowtorch is arranged on the fixed seat in a sliding manner, a nozzle of the blowtorch is positioned at the inner side of the through hole or is flush with the upper surface of the conveyor belt after penetrating through the through hole, the blowtorch is fixed with the inner side of the conveyor belt, and the conveyor belt can drive the blowtorch to move in a reciprocating manner when moving in a reciprocating manner;
the lifting mechanism comprises a telescopic rod, and the telescopic rod is fixed with the deposition box and is used for driving the deposition box to slide up and down;
an outer diameter measuring device for measuring the outer diameter of the loose body;
and the controller is electrically connected with the outer diameter measuring equipment and the lifting mechanism and is used for controlling the working of the lifting mechanism according to the signal transmitted by the outer diameter measuring equipment.
2. The apparatus for depositing an optical fiber preform according to claim 1, wherein the driving pulley has a plurality of teeth on an outer side thereof, and the driving belt has teeth on an inner side thereof to be engaged with the teeth.
3. The apparatus for depositing an optical fiber preform according to claim 1, wherein the holder has a slide groove thereon, and the torch has a slider engaged with the slide groove.
4. An apparatus for depositing an optical fiber preform according to claim 3, wherein the sliding groove has a trapezoidal shape, a T shape or a dovetail shape, and the outer profile of the sliding block is adapted to the sliding groove.
5. The deposition apparatus for an optical fiber preform according to claim 1, wherein the torch has a gap between an upper end thereof and the through hole, and further comprising a thermal insulating jacket which is externally fitted over the upper end of the torch and internally fitted in the through hole.
6. The apparatus for depositing an optical fiber preform according to claim 5, wherein the heat insulating jacket includes a hollow small diameter portion protruding into the through hole and a hollow large diameter portion abutting against an upper surface of the belt.
7. The apparatus for depositing an optical fiber preform of claim 1, wherein the torch is fixed to the driving belt by an L-shaped connecting member, the L-shaped connecting member including a horizontal portion fixed to the driving belt and a vertical portion fixed to a sidewall of the torch.
8. The deposition apparatus for an optical fiber preform according to claim 1, wherein the elevating mechanism is provided at a lower end of the machine tool, and the telescopic rod of the elevating mechanism is inserted into the machine tool and fixed to a lower end of the deposition chamber, and the elevating mechanism is a hydraulic cylinder or an electric ram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110926580.7A CN113548796B (en) | 2019-07-15 | 2019-07-15 | Optical fiber perform's deposition equipment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910635481.6A CN110342808B (en) | 2019-07-15 | 2019-07-15 | Manufacturing process of optical fiber preform |
| CN202110926580.7A CN113548796B (en) | 2019-07-15 | 2019-07-15 | Optical fiber perform's deposition equipment |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910635481.6A Division CN110342808B (en) | 2019-07-15 | 2019-07-15 | Manufacturing process of optical fiber preform |
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| CN113548796A CN113548796A (en) | 2021-10-26 |
| CN113548796B true CN113548796B (en) | 2022-11-04 |
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| CN201910635481.6A Active CN110342808B (en) | 2019-07-15 | 2019-07-15 | Manufacturing process of optical fiber preform |
| CN202110926580.7A Active CN113548796B (en) | 2019-07-15 | 2019-07-15 | Optical fiber perform's deposition equipment |
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| CN201910635481.6A Active CN110342808B (en) | 2019-07-15 | 2019-07-15 | Manufacturing process of optical fiber preform |
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| CN112777929A (en) * | 2021-03-29 | 2021-05-11 | 浙江富通光纤技术有限公司 | Preform deposition method |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2991397B2 (en) * | 1993-11-24 | 1999-12-20 | 矢崎総業株式会社 | Method for manufacturing optical fiber preform and apparatus for manufacturing optical fiber preform |
| JPH07172859A (en) * | 1993-12-21 | 1995-07-11 | Shin Etsu Chem Co Ltd | Production of porous glass preform for optical fiber |
| FR2756556B1 (en) * | 1996-12-02 | 1999-01-08 | Alsthom Cge Alcatel | INSTALLATION FOR MANUFACTURING A FIBER OPTIC PREFORM |
| FR2776652B1 (en) * | 1998-03-30 | 2000-04-28 | Alsthom Cge Alcatel | IMPROVED PROCESS FOR SHRINKING A FIBER OPTIC PREFORM |
| JP4748758B2 (en) * | 2004-03-18 | 2011-08-17 | 信越化学工業株式会社 | Porous glass base material manufacturing equipment |
| WO2007079127A2 (en) * | 2005-12-29 | 2007-07-12 | Silica Tech, Llc | Plasma torch for making synthetic silica |
| JP4857172B2 (en) * | 2007-04-16 | 2012-01-18 | 株式会社フジクラ | Apparatus and method for manufacturing glass preform for optical fiber |
| JP2010076982A (en) * | 2008-09-26 | 2010-04-08 | Sumitomo Electric Ind Ltd | Burner and apparatus for manufacturing porous glass |
| JP2011230936A (en) * | 2010-04-23 | 2011-11-17 | Shin-Etsu Chemical Co Ltd | Burner for manufacturing porous glass preform |
| CN105776839A (en) * | 2016-04-28 | 2016-07-20 | 江苏亨通光导新材料有限公司 | Optic fiber prefabricated loose mass deposition device and deposition method thereof |
| CN108147653B (en) * | 2016-12-02 | 2020-09-08 | 中天科技精密材料有限公司 | Optical fiber preform manufacturing system |
| CN106892555B (en) * | 2017-02-15 | 2019-05-24 | 天津富通集团有限公司 | The manufacturing process of large-scale optical fiber prefabricating stick |
| CN107804966A (en) * | 2017-10-30 | 2018-03-16 | 深圳市中科智诚科技有限公司 | A kind of intelligent preform production equipment with recovery function |
| CN108017271B (en) * | 2017-12-29 | 2023-10-20 | 通鼎互联信息股份有限公司 | OVD (over-the-counter lamp) strip-shaped blowlamp device, OVD rod making system and use method thereof |
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2019
- 2019-07-15 CN CN201910635481.6A patent/CN110342808B/en active Active
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| CN110342808B (en) | 2021-09-21 |
| CN110342808A (en) | 2019-10-18 |
| CN113548796A (en) | 2021-10-26 |
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