CN107089791A - A kind of preform extension method - Google Patents
A kind of preform extension method Download PDFInfo
- Publication number
- CN107089791A CN107089791A CN201710294519.9A CN201710294519A CN107089791A CN 107089791 A CN107089791 A CN 107089791A CN 201710294519 A CN201710294519 A CN 201710294519A CN 107089791 A CN107089791 A CN 107089791A
- Authority
- CN
- China
- Prior art keywords
- extension
- preform
- tension force
- temperature
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
- C03B37/01245—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down by drawing and collapsing
-
- 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
- C03B37/07—Controlling or regulating
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention provides a kind of preform extension method, comprise the following steps：1) plug is inserted in sleeve pipe；2) by plug, the collapsing in extension stove is integrated with sleeve pipe；3) prefabricated rods extend, and extension process controls the extension diameter of preform by extending tension force；4) numerical value change of the tension force of monitoring extension in real time, when extending tension force beyond values, carries out in-furnace temperature regulation and control.The preform extension method that the present invention is provided, without installing caliper, has saved equipment cost, substantially increases the simplicity and security of practical operation.The present invention is by extending tension feedback in-furnace temperature, pass through the extension diameter of in-furnace temperature feedback regulation preform again, realize the dynamic equilibrium between elongating temperature and prefabricated rods internal stress, it is ensured that the uniformity of prefabricated rods internal stress, improve the optical stabilization performance of product.
Description
Technical field
The present invention relates to preform technical field, specifically, it is related to a kind of preform extension method.
Background technology
At present, the preparation method of preform is broadly divided into sedimentation and tiretube process.Sedimentation as first deposits optical wand
Sandwich layer, then deposits covering, then transparent prefabricated rods are made after dehydration sintering.Tiretube process is will to be constituted in plug plug-in-sleeve
Prefabricated rods, wherein it is referred to as RIT (Rod in Tube) using the prefabricated rods of small size sleeve pipe, typically can a length of string 700km left sides
The right side, and use the prefabricated rods of unstretched large scale sleeve to be referred to as RIC (Rod in Cylinder), general length of string
1200~5000km.RIC prefabricated rods have two kinds of preparation methods：One kind is, without first that plug and sleeve pipe collapsing is integral, to draw
The wire drawing in collapsing in silk stove, this kind of mode wire drawing cost is low but less efficient, and needs the fiber drawing furnace of relatively high power；It is another
Kind it is to need first that plug and sleeve pipe collapsing is integral, although then offline wire drawing again, this mode adds a procedure, but
It is that wire drawing is stable, efficient attenuation is higher.
Chinese patent CN201510301310.1 discloses a kind of prefabricated rods docking and drawing process, is docked using two rods
Wire-drawing technology, sandwich layer melts used temperature, and optical wand joint is provided with chamfering, and the removal of end face bubble, right during convenient docking
To the annealing of end face after the completion of connecing, and moment accelerates control of the program in wire drawing node to naked fibre diameter.This is existing
Technology realizes not reduction of speed and crosses node, does not block up mould, and constantly fine wire drawing requirement substantially increases production efficiency.
Chinese patent CN201110053355.3 discloses horizontal-extending device and its side of a kind of single-mode fiber prefabricated rods
Method, i.e., extend into major diameter prefabricated rods a kind of method and apparatus of minor diameter prefabricated rods.Its device includes left side chuck, right side
Extension chuck, caliper, high temperature furnace and controller.Prefabricated rods mother metal sends rod chuck and right side drive division by left side drive division
Divide extension chuck grasping；The actual outside diameter of caliper measurements prefabricated rods mother metal and the position for recording current rod when testing each external diameter value
Put, when the heating part of prefabricated rods mother metal is turned into molten condition by high temperature furnace, extension starts, by controller is come the speed to extending chuck
Degree is controlled, so after restrained stretching rod diameter, make mother metal stretch after rod footpath be in close proximity to aimed dia.
In the prior art, preform needs to feed back the straight of preform in time using caliper in extension process
Footpath situation of change, wire drawing furnace temperature and draw speed are controlled according to the change of this numerical value.But so operation can bring one
Consequence：Diameter signal feedback is inaccurate or causes furnace temperature abnormal not in time, the fracture of stretching tail pipe, optical wand torsional deformation etc. occurs and asks
Topic.
The content of the invention
For above-mentioned technical problem, the invention provides a kind of preform extension method, using the technology of the present invention
Scheme, can prevent from stretching the accidents such as tail pipe fracture, rod torsional deformation caused by when furnace temperature is abnormal.
The technical scheme is that：
A kind of preform extension method, comprises the following steps：
1) plug is inserted in sleeve pipe；
2) by plug, the collapsing in extension stove is integrated with sleeve pipe；
3) prefabricated rods extend, and extension process controls the extension diameter of preform by extending tension force；
4) numerical value change of the tension force of monitoring extension in real time, when extending tension force beyond values, carries out in-furnace temperature
Regulation and control.
In above-mentioned steps, the mode for carrying out in-furnace temperature regulation can be artificial progress, can also be realized by extending stove
Automation regulation.
In the inventive solutions, the extension process does not control extension by measuring the diameter of preform
Stove.Caliper is not installed in the extension apparatus of preform, extension process need not be by caliper come Real-time Feedback
The external diameter situation of change of preform, it is not necessary to regulate and control the temperature of extension stove by caliper or regulate and control preform
Extension speed.
Further, the elongating temperature changes according to the change of extension tension force.
Further, the extension speed of the extension process preform keeps constant；The constant finger of extension speed herein
, entirely extend process, the extension speed of the thick rod extended keeps constant, and the thin rod after extension extension speed
Keep constant.
Further, the extension process controls to extend in-furnace temperature according to extension tension force, then passes through Control for Kiln Temperature optical fiber
The extension diameter of prefabricated rods.
Further, the step 4) in, the scope of the extension tension force preset value is 14-17N, preferably 15-16N.
Further, the step 4) in, alarm threshold value is additionally provided with, when extending tension force into the threshold range set,
Start warning system；The scope of the extension tension force alarm threshold value is≤10N or >=20N.The alarm includes the too low report of temperature
The alarm of alert or temperature anomaly：When extending tension force >=20 N, the too low alert program of start-up temperature；When extending tension force≤10N, open
Dynamic furnace temperature abnormal alarm program.
Further, the temperature when preform goes out to extend fire door is 500-1200 DEG C, preferably 600-900 DEG C.
Compared with prior art, the beneficial effects of the invention are as follows：
1) present invention eliminates diameter measuring device, without installing caliper again in extension stove, equipment cost has been saved；Not yet
There is caliper, also just eliminating the position real-tune TT ＆ C preform diameter of constantly regulate caliper in existing operation, this is cumbersome
Step, substantially increases the simplicity and security of practical operation.
2) present invention will be revised as by extending tension force in the prior art by diameter measurement come feedback regulation in-furnace temperature
To control to extend diameter, it is to avoid because diameter signal feedback is inaccurate or not in time caused by produce the feelings such as abnormal, optical wand loss
Condition.
3) present invention then passes through in-furnace temperature feedback regulation optical fiber prefabricating by extending temperature in tension feedback stove and regulation
The extension diameter of rod, it is simple and efficient, it is quick on the draw, fast response time, operating efficiency is high, process stabilizing improves the good of product
Rate.
4) present invention is provided with extension tension force preset value in extension process, during beyond values, in extension stove
Temperature realizes control of stabilizing automatically, when overruning excessive, meeting warning reminding, effectively further adds the security of production
With the stability of product.
5) technical scheme, the dynamic between elongating temperature and prefabricated rods internal stress is realized by extending tension force
Balance, it is ensured that the uniformity of prefabricated rods internal stress, improves the optical stabilization performance of product.
6) technical scheme, prefabricated rods extension speed, extension diameter keep constant so as to ensure that fiber products
Stability.
Brief description of the drawings
Fig. 1 is the extension method schematic diagram of the preform of prior art；
Fig. 2 is the extension method schematic diagram of the preform of the present invention.
Embodiment
Below in conjunction with drawings and examples, the present invention will be described in further detail.It should be appreciated that described herein
Specific embodiment only to explain the present invention, is not intended to limit the present invention.
In the prior art, the extension diameter of preform is controlled by the caliper in extension stove
's.As shown in figure 1, during extension, the diameter change information of preform is fed back by caliper, is judged with this
Extend stove temperature conditionss, then by adjust furnace temperature or extension speed so that regulate and control prefabricated rods extension diameter.Whole mistake
Accurate control of the journey to preform diameter depends on two links：The accuracy of caliper measurements data and extension Control for Kiln Temperature
Accuracy, this accuracy shows any ring in the accuracy of measurement data and the promptness of feedback information, two links
There is error, may result in the exception of production process, if the problems such as fiber loss, the fracture of stretching tail pipe, optical wand torsional deformation.
And the design concept of technical solution of the present invention is exactly to control this technology barrier of furnace temperature to get around caliper, seek
A kind of easy, quick, efficient prefabricated rods extension method.
Embodiment 1
As described in Figure 2, the preform extension method that the present invention is provided, before extension step, first prepares prefabricated rods
Collapsing body, gets out large-sized plug and sleeve pipe, plug is positioned in sleeve pipe, adjust correspondence position, be subsequently placed in and prolong
Stretch in stove, treat that plug and sleeve pipe collapsing are integrated, that is, carry out the prefabricated extension process of next step.In the extension of prefabricated rods
Journey, mainly controls the extension diameter of preform by extending tension force.In extension process, it is necessary to monitor prefabricated rods in real time
Extend the numerical value change of tension force, when extending tension force beyond values, carry out extension furnace temperature regulation and control.
In the inventive solutions, to the regulation and control of extension furnace temperature, realized, rather than surveyed by extending tension force
Footpath instrument.Therefore caliper need not be installed in extension process, extension stove, saves equipment cost.Principle as shown in Figure 2
Figure, the extension tension force of prefabricated rods reflects elongating temperature, and elongating temperature changes with the change of extension tension force, and this is one
Two-way Feedback and the process of regulation, then regulate and control the temperature of extension stove according to the size of extension tension force, and then to prefabricated rods
Diameter realizes dynamic control.
In extension process, the extension tension force of prefabricated rods is influenceed by the viscous flow of material itself, and viscous flow is by temperature
Control.In extension process, extension tension force F and elongating temperature T deposits corresponding relation, is formulated as：
Wherein k and ξ are distributed as surface tension and viscous flow constant.
Based on this, the present invention devises a kind of technical scheme, by the size control elongating temperature for controlling extension tension force.
Extension process, elongating temperature is higher, and prefabricated rods softening degree is bigger, and extension tension force is just smaller.It follows that when extension tension force
When excessive, extension in-furnace temperature need to be improved, conversely, when extension tension force is too small, extension in-furnace temperature need to be reduced.Here it is this hair
The bright principle for extending furnace temperature by extending tension force.And to extending the control of furnace temperature, artificial observation defensive position can be passed through
Dynamic regulation, can also be adjusted by the Automated condtrol of equipment.
In extension process, elongating temperature has corresponding relation, i.e. stable extension with the internal stress with preform
The stable prefabricated rods internal stress of tension force correspondence.Because during internal stress skewness, the intensity of prefabricated rods can be reduced and thermally-stabilised
Property, and then influence the optical property of fiber products.And technical scheme, by extend tension force realize elongating temperature and
Dynamic equilibrium between prefabricated rods internal stress, reaches a relatively steady state, so as to ensure that the equal of prefabricated rods internal stress
Even property, improves the optical stabilization performance of product.
In the inventive solutions, the extension speed of extension process preform keeps constant；Extension herein
Speed is constant to refer to whole extension process, and the extension speed for extend thick rod keeps constant, and the thin rod after extension
Extension speed is also constant.Extension process actually pulls into thick rod the process of thin rod, namely the body passed through in unit interval t
Product keeps constant.There is following relation：
Further, obtain：
In above-mentioned formula, d1For the diameter of the thick rod before extension, d2For the diameter of the thin rod after extension；v1For prolonging for thick rod
Stretch speed, v2For the extension speed of thin rod.
Extend process in the prefabricated rods of the present invention, the diameter d of thick rod before extension1Keep constant, extension speed also v1Also keep
It is constant.By the control in technical solution of the present invention to extension tension force and elongating temperature, the thin rod diameter d after extension is realized2Protect
Hold constant, so, the extension speed v of the thin rod after extension2Also necessarily keep constant, whole prefabricated rods extension process, which is realized, prolongs
Stretch speed and keep constant, extension diameter keeps constant, so as to ensure that the stability of fiber products.
Embodiment 2
A kind of preform extension method, comprises the following steps：
1) plug is inserted in sleeve pipe；
2) by plug, the collapsing in extension stove is integrated with sleeve pipe；
3) prefabricated rods extend, and extension process controls the extension diameter of preform by extending tension force；
4) numerical value change of the tension force of monitoring extension in real time, when extending tension force beyond values, carries out in-furnace temperature
Regulation and control.
In above-mentioned steps, in-furnace temperature realizes automation regulation.
In the inventive solutions, extension process does not control extension by measuring the extension diameter of preform
Stove.Therefore, caliper can not be installed in the extension apparatus of preform.Caliper can also be installed, but be not involved in control
The temperature of system extension stove, only does operating personnel's supplementary observation and uses.It is to be realized by extending tension force to the control for extending furnace temperature
, then the extension diameter for passing through Control for Kiln Temperature preform.Elongating temperature changes according to the change of extension tension force.
The extension speed of extension process preform keeps constant, i.e., whole extension process, the thick rod extended
Extension speed keeps constant, and the extension speed of the thin rod after extension also keeps constant.
Above-mentioned extension step 4) in, extend the scope of tension force preset value for 14-17N, preferably 15-16N, also can be further
It is set as 15 ± 0.5N of value.
Above-mentioned extension step 4) in, alarm threshold value is additionally provided with, when extending tension force into the threshold range set, is started
Warning system；It is≤10N or >=20N to extend the scope of tension force alarm threshold value.Alarm includes the too low alarm of temperature or temperature anomaly
(too high) alarm：When extending tension force >=20 N, the too low alert program of start-up temperature；When extending tension force≤10N, start furnace temperature
Abnormal alarm program；Operating personnel are reminded to be handled in time.
In above-mentioned extension step, temperature is 500-1200 DEG C, preferably 600-900 when preform goes out to extend fire door
DEG C, concrete numerical value includes 600 DEG C, 650 DEG C, 700 DEG C, 750 DEG C, 800 DEG C, 850 DEG C, 900 DEG C etc..
The preform extension method that the present invention is provided, without installing caliper, has saved equipment cost；Eliminate existing
The step for having the diameter of the position real-tune TT ＆ C prefabricated rods of constantly regulate caliper in operation, substantially increases practical operation
Simplicity and security.Simultaneously, it is to avoid because diameter signal feedback is inaccurate or not in time caused by produce abnormal, optical wand loss
Situations such as, operation is more convenient, fast, and process stabilizing is high, and the stability of product is good.
The present invention is by extending tension adjustment in-furnace temperature, then the extension for regulating and controlling preform by in-furnace temperature is straight
Footpath, realizes the dynamic equilibrium between elongating temperature and prefabricated rods internal stress, it is ensured that the uniformity of prefabricated rods internal stress, improves
The optical stabilization performance of product.
The preferred embodiments of the present invention have shown and described in described above, as previously described, it should be understood that not office of the invention
Be limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations, modification and
Environment, and can be changed in invention contemplated scope described herein by the technology or knowledge of above-mentioned teaching or association area
It is dynamic., then all should be appended by the present invention and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In scope of the claims.
Claims (10)
1. a kind of preform extension method, it is characterised in that comprise the following steps：
1) plug is inserted in sleeve pipe；
2) by plug, the collapsing in extension stove is integrated with sleeve pipe；
3) preform extends；
The step 3) in, the extension diameter of preform is controlled by extending tension force.
2. preform extension method according to claim 1, it is characterised in that：Also include step 4), monitoring in real time
Extend the numerical value change of tension force, when extending tension force beyond values, carry out temperature adjusting.
3. preform extension method according to claim 1, it is characterised in that：The extension process does not pass through measurement
The extension diameter of preform come control extend furnace temperature.
4. preform extension method according to claim 1, it is characterised in that：The extension process is according to extension
Power controls to extend in-furnace temperature, then the extension diameter for passing through Control for Kiln Temperature preform.
5. preform extension method according to claim 1, it is characterised in that：The extension process extension speed is protected
Hold constant.
6. preform extension method according to claim 2, it is characterised in that：The model of the extension tension force preset value
Enclose for 13-17N.
7. preform extension method according to claim 2, it is characterised in that：The step 4) in, it is additionally provided with
Alarm threshold value, when extending tension force into the threshold range set, starts warning system.
8. preform extension method according to claim 7, it is characterised in that：The extension tension force alarm threshold value
Scope is≤10N or >=20N.
9. preform extension method according to claim 7, it is characterised in that：The alarm includes the too low report of temperature
The alarm of alert or temperature anomaly：When extending tension force >=20 N, the too low alert program of start-up temperature；When extending tension force≤10N, open
Dynamic furnace temperature abnormal alarm program.
10. preform extension method according to claim 1, it is characterised in that：The preform goes out extension
Temperature during fire door is 500-1200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294519.9A CN107089791B (en) | 2017-04-28 | 2017-04-28 | A kind of preform extension method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294519.9A CN107089791B (en) | 2017-04-28 | 2017-04-28 | A kind of preform extension method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107089791A true CN107089791A (en) | 2017-08-25 |
| CN107089791B CN107089791B (en) | 2019-10-25 |
Family
ID=59637540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710294519.9A Active CN107089791B (en) | 2017-04-28 | 2017-04-28 | A kind of preform extension method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107089791B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114014531A (en) * | 2021-10-29 | 2022-02-08 | 浙江富通光纤技术有限公司 | Optical fiber preform manufacturing process and preform thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080072420A (en) * | 2007-02-02 | 2008-08-06 | 엘에스전선 주식회사 | Monitoring apparatus of clad layer in optical fiber during drawing process and monitoring method using the same |
| CN103382086A (en) * | 2012-05-02 | 2013-11-06 | 信越化学工业株式会社 | Method and apparatus for elongating glass rod material |
| CN103819083A (en) * | 2012-11-16 | 2014-05-28 | 浙江富通光纤技术有限公司 | Method and device for controlling extension of optical fiber base metal |
| CN104529151A (en) * | 2015-01-22 | 2015-04-22 | 宁波大学 | Preparation method and preparation equipment of optical fiber preform |
| CN104944762A (en) * | 2015-06-05 | 2015-09-30 | 江苏斯德雷特通光光纤有限公司 | Precast rod abutting-joint and wire-drawing process |
-
2017
- 2017-04-28 CN CN201710294519.9A patent/CN107089791B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080072420A (en) * | 2007-02-02 | 2008-08-06 | 엘에스전선 주식회사 | Monitoring apparatus of clad layer in optical fiber during drawing process and monitoring method using the same |
| CN103382086A (en) * | 2012-05-02 | 2013-11-06 | 信越化学工业株式会社 | Method and apparatus for elongating glass rod material |
| CN103819083A (en) * | 2012-11-16 | 2014-05-28 | 浙江富通光纤技术有限公司 | Method and device for controlling extension of optical fiber base metal |
| CN104529151A (en) * | 2015-01-22 | 2015-04-22 | 宁波大学 | Preparation method and preparation equipment of optical fiber preform |
| CN104944762A (en) * | 2015-06-05 | 2015-09-30 | 江苏斯德雷特通光光纤有限公司 | Precast rod abutting-joint and wire-drawing process |
Non-Patent Citations (1)
| Title |
|---|
| 陈炳炎著: "《光纤光缆的设计和制造》", 30 June 2016, 浙江大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114014531A (en) * | 2021-10-29 | 2022-02-08 | 浙江富通光纤技术有限公司 | Optical fiber preform manufacturing process and preform thereof |
| CN114014531B (en) * | 2021-10-29 | 2023-07-25 | 浙江富通光纤技术有限公司 | Manufacturing process of optical fiber preform and preform thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107089791B (en) | 2019-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6965283B2 (en) | Methods and Equipment for Forming Glass Tubes from Glass Base Materials | |
| US7805963B2 (en) | Method for continuously forming optical fiber connector glass and other close tolerance components | |
| JP6954088B2 (en) | Method for manufacturing silicon single crystal | |
| KR940014216A (en) | Drawing method of glass product and its device | |
| CN104053634A (en) | Process for producing cylindrical component made of glass by elongation | |
| CN103760934A (en) | Method and system used for monitoring temperature of semiconductor heat treatment equipment | |
| JP6832346B2 (en) | Glass manufacturing equipment and its operation method | |
| CN107089791A (en) | A kind of preform extension method | |
| CN102759939A (en) | Control system and control method of annealing furnace | |
| CN110790501A (en) | Sintering device and method for optical fiber preform | |
| JP4563391B2 (en) | Apparatus and method for manufacturing tubes or rods | |
| CN109375565A (en) | A kind of TFT glass substrate BOW type on-line checking automatic regulating system and method | |
| EP3207352B1 (en) | Apparatus and method for preform or tube drawing based on its viscosity | |
| KR100817987B1 (en) | Method of stretching optical fiber base material and stretching device | |
| US20150299023A1 (en) | Processing method of glass base material for optical fiber | |
| Voyce et al. | Mathematical modeling of the self-pressurizing mechanism for microstructured fiber drawing | |
| EP3305735B1 (en) | Optical fiber production method | |
| CN102206040A (en) | Horizontal extension device of optical fiber preform | |
| CN211141894U (en) | Optical fiber perform's sintering device | |
| JP2006193397A (en) | Method and apparatus for drawing glass preform | |
| CN104445917B (en) | A kind of optical fiber production automatic temperature control system and control method | |
| CN103979788B (en) | Mother metal stretching heater | |
| CN109539766B (en) | Anti-disturbance accurate temperature control method for heating section of tunnel oven | |
| CN102320736A (en) | Optical fiber wire-drawing furnace gas stabilization control device and control method thereof | |
| JP2005145765A (en) | Method for controlling outer diameter of glass preform and apparatus for drawing glass preform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 219, Beihai West Road, Haimen Street, Haimen District, Nantong City, Jiangsu Province 226199 Patentee after: Jiangsu Sterlite Tongguang Fiber Co.,Ltd. Address before: 226100 219 Beihai West Road, Haimen City, Nantong City, Jiangsu Province Patentee before: JIANGSU STERLITE TONGGUANG FIBER Co.,Ltd. |