CN112340978A - Method for manufacturing optical fiber preform and spraying device for preparing optical fiber preform - Google Patents
Method for manufacturing optical fiber preform and spraying device for preparing optical fiber preform Download PDFInfo
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- CN112340978A CN112340978A CN202011090839.0A CN202011090839A CN112340978A CN 112340978 A CN112340978 A CN 112340978A CN 202011090839 A CN202011090839 A CN 202011090839A CN 112340978 A CN112340978 A CN 112340978A
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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
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
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Abstract
The application relates to a manufacturing method of an optical fiber preform and a spraying device for preparing the optical fiber preform, which comprises the following steps: spraying slurry on the surface of the core rod at a preset temperature to obtain a colloid prefabricated rod, wherein the slurry comprises silicon dioxide powder and an aqueous adhesive; carrying out glue discharging treatment on the colloidal preform to obtain a porous preform; and carrying out dehydroxylation and vitrification treatment on the porous prefabricated rod to obtain the optical fiber prefabricated rod. The method and the device can solve the problem of environmental pollution in the related art when the optical fiber preform is prepared by adopting a vapor deposition method.
Description
Technical Field
The application relates to the technical field of optical fiber perform manufacturing, in particular to a manufacturing method of an optical fiber perform and a spraying device for preparing the optical fiber perform.
Background
At present, OVD (outside vapor deposition) and PCVD (plasma chemical vapor deposition) are mostly adopted for manufacturing optical fiber preforms) Vapor deposition methods such as MCVD (modified chemical vapor deposition), VAD (axial vapor deposition), and the like. Most of these techniques are SiCl4As a raw material, a large amount of HCl is generated during the manufacturing process. The HCl has great pollution to the environment, the equipment used in the production process needs to use special materials, and the equipment manufacturing cost is high. In order to eliminate HCl, a large amount of alkali is consumed for treating tail gas, and the treated sewage contains high salt, which poses serious threat to microorganisms in water. Further, in the field of optical fiber preform manufacturing, SiO produced by vapor deposition2About 30-40% of the powder can not be completely collected to be made into an optical fiber preform, which causes resource waste.
Disclosure of Invention
The embodiment of the application provides a manufacturing method of an optical fiber perform rod and a spraying device for preparing the optical fiber perform rod, and aims to solve the problem of environmental pollution existing in the process of preparing the optical fiber perform rod by adopting a vapor deposition method in the related technology.
In a first aspect, there is provided a method of fabricating an optical fiber preform, comprising the steps of:
spraying slurry on the surface of the core rod at a preset temperature to obtain a colloid prefabricated rod, wherein the slurry comprises silicon dioxide powder and an aqueous adhesive;
carrying out glue discharging treatment on the colloidal preform to obtain a porous preform;
and carrying out dehydroxylation and vitrification treatment on the porous prefabricated rod to obtain the optical fiber prefabricated rod.
In some embodiments, before spraying the slurry on the surface of the core rod, the method further comprises the following steps of:
uniformly mixing the aqueous adhesive and the silicon dioxide powder to obtain a mixture;
measuring the viscosity of the mixture and judging whether the viscosity of the mixture reaches a set viscosity;
if so, finishing the preparation of the slurry; otherwise, adding water to the mixture and returning to the step of measuring the viscosity of the mixture.
In some embodiments, in the slurry, the mass fraction of the silica powder is 50% to 80%; and/or the presence of a gas in the gas,
the aqueous adhesive comprises at least one of polyvinyl alcohol aqueous adhesive, ethylene acetate aqueous adhesive, acrylic acid aqueous adhesive, polyurethane aqueous adhesive and epoxy aqueous adhesive; and/or the presence of a gas in the gas,
the temperature of the dehydroxylation is 1200-1300 ℃, and the vitrification temperature is 1500-1600 ℃.
In some embodiments, the spraying the slurry toward the surface of the core rod to obtain the colloidal preform includes the following steps:
driving the core rod to rotate around the axis of the core rod;
completing one-time slurry spraying from one end of the core rod to the other end of the core rod along the axial direction of the core rod;
and repeating the slurry spraying for a plurality of times to obtain the colloidal prefabricated rod.
In some embodiments, the spraying of the slurry is repeated several passes, including the steps of:
measuring the spraying weight and judging whether the spraying weight reaches a preset weight;
if yes, the step of glue discharging treatment is carried out; otherwise, spraying is carried out again, and the step of measuring the spraying weight is returned.
In some embodiments, the spray flow rate Q is calculated using the following equation:
Q＝π×D×d×h×w×n
wherein D is the diameter of the mandrel, D is the width of the nozzles used in the spraying, h is the thickness of the spraying, w is the rotational speed of the mandrel, and n is the number of nozzles used in the spraying.
In some embodiments, the step of removing the gel from the colloidal preform comprises:
carrying out water removal treatment on the colloidal preform;
and carrying out first heat treatment on the colloid prefabricated rod in an oxygen atmosphere to oxidize the aqueous adhesive.
In some embodiments, after the first heat treatment is completed, the method further comprises the following steps:
and carrying out secondary heat treatment on the colloidal preform, wherein the temperature of the secondary heat treatment is higher than that of the primary heat treatment.
In a second aspect, there is provided a spray coating apparatus for preparing an optical fiber preform, comprising:
the clamping mechanism is provided with two rotating chucks which are oppositely arranged, and clamping parts for clamping the core rod are arranged on the opposite wall surfaces of the two rotating chucks;
a spray mechanism having a nozzle, the nozzle facing the mandrel;
actuating mechanism, actuating mechanism with spraying mechanism with fixture all links to each other, actuating mechanism is used for: the two rotary chucks are driven to drive the core rod to rotate around the axis of the core rod, the spraying mechanism and the clamping mechanism are driven to move relatively along the axis direction of the core rod, and the spraying mechanism is driven to spray slurry towards the core rod.
In some embodiments, the spraying device further comprises a heating mechanism, the heating mechanism is provided with a heating area, and the area between the two chucks and the heating area at least partially overlap with each other; and/or the presence of a gas in the gas,
the spraying device further comprises a weighing unit, and the weighing unit is connected with the clamping mechanism and used for weighing the weight of the slurry sprayed on the core rod.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a manufacturing method of an optical fiber preform and a spraying device for preparing the optical fiber preform, in the manufacturing method provided by the embodiment, in the manufacturing process of the optical fiber preform, silica powder is directly used as a raw material, an aqueous adhesive is used as an adhesive and is uniformly mixed to obtain slurry, then the slurry is uniformly sprayed on the surface of a core rod in a spraying mode, so that the silica powder is adhered on the core rod through the aqueous adhesive, after the spraying amount of the slurry meets the requirement, the aqueous adhesive is removed through a glue discharging treatment process to obtain a porous preform, and finally, the optical fiber preform is obtained through dehydroxylation and vitrification treatment.
In the manufacturing method provided by the embodiment, on one hand, since the silicon dioxide powder is directly used as the raw material, toxic and harmful substances such as HCl and the like do not occur, the environmental pollution is avoided, the tail gas does not need to be treated by alkali, the risk that microorganisms in the water body are threatened due to the high salt content in the treated sewage is avoided, and therefore the environmental pollution problem of the optical fiber perform manufacturing industry can be improved. In the second aspect, the aqueous adhesive is used as the adhesive, and the aqueous adhesive in the preform can be removed through glue removing treatment, so that the purity of the preform is not influenced. In the third aspect, the spraying mode is adopted in the embodiment, and the spraying has higher adhesiveness, so that the optical fiber preform can be more efficiently deposited on the core rod during spraying, the raw material collection rate of the optical fiber preform is improved, and the manufacturing cost of the optical fiber preform is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for fabricating an optical fiber preform according to an embodiment of the present disclosure;
FIG. 2 is a flow chart for preparing a slurry provided in an embodiment of the present application;
FIG. 3 is a flow chart of spraying slurry onto the surface of a core rod to obtain a colloidal preform according to an embodiment of the present disclosure;
FIG. 4 is a flow chart for repeating several passes of slurry spraying provided by an embodiment of the present application;
FIG. 5 is a flow chart illustrating a process for removing gel from a colloidal preform according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a spraying apparatus for preparing an optical fiber preform according to an embodiment of the present disclosure.
In the figure: 1. a clamping mechanism; 10. a chuck; 2. a core rod; 3. a spraying mechanism; 30. a nozzle; 4. a gas distribution grid; 5. a main body portion; 6. an exhaust hood.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.
The embodiment of the application provides a manufacturing method of an optical fiber preform, which can solve the problem of environmental pollution in the related art when the optical fiber preform is prepared by adopting a vapor deposition method.
Referring to fig. 1, an embodiment of the present application provides a method for manufacturing an optical fiber preform, including the steps of:
101: spraying slurry on the surface of the core rod at a preset temperature to obtain a colloid prefabricated rod, wherein the slurry comprises silicon dioxide powder and an aqueous adhesive; in this step, the slurry on the surface of the core rod is assisted in solidification by heating at a preset temperature. The heating method is not limited, and for example, the heating method may be a hot air feeding method, or an electric furnace heating method.
102: carrying out glue discharging treatment on the colloidal preform to obtain a porous preform;
103: and carrying out dehydroxylation and vitrification treatment on the porous prefabricated rod to obtain a transparent optical fiber prefabricated rod.
In the manufacturing method provided by this embodiment, during the manufacturing process of the optical fiber preform, silica powder is directly used as a raw material, an aqueous adhesive is used as an adhesive, the silica powder and the aqueous adhesive are uniformly mixed to obtain a slurry, the slurry is uniformly sprayed on the surface of the core rod by a spraying manner, so that the silica powder is adhered to the core rod by the aqueous adhesive, when the spraying amount of the slurry meets the requirement, the aqueous adhesive is removed by a glue removing process to obtain a porous preform, and finally, the optical fiber preform is obtained by dehydroxylation and vitrification.
In the manufacturing method provided by the embodiment, on one hand, since the silicon dioxide powder is directly used as the raw material, toxic and harmful substances such as HCl and the like do not occur, the environmental pollution is avoided, the tail gas does not need to be treated by alkali, the risk that microorganisms in the water body are threatened due to the high salt content in the treated sewage is avoided, and therefore the environmental pollution problem of the optical fiber perform manufacturing industry can be improved. In the second aspect, the aqueous adhesive is used as the adhesive, and the aqueous adhesive in the preform can be removed through glue removing treatment, so that the purity of the preform is not influenced. In the third aspect, the spraying mode is adopted in the embodiment, and the spraying has higher adhesiveness, so that the optical fiber preform can be more efficiently deposited on the core rod during spraying, the raw material collection rate of the optical fiber preform is improved, and the manufacturing cost of the optical fiber preform is reduced.
In some preferred embodiments, the aqueous adhesive includes at least one of a polyvinyl alcohol-based aqueous adhesive, an ethylene acetate-based aqueous adhesive, an acrylic aqueous adhesive, a polyurethane-based aqueous adhesive, and an epoxy aqueous adhesive.
In the embodiment, the adhesive can be oxidized to generate H during adhesive discharge treatment2O、CO2、NO2And the gas is removed.
In some embodiments, the method has a raw material collection rate of greater than 95%.
In some preferred embodiments, before step 101, a step of roughening the surface of the core rod is further included, specifically, the surface of the core rod is ground by using a grinding wheel with a granularity of 100-1000 meshes, and then the surface of the core rod is cleaned by using a high-pressure cleaning machine.
In some preferred embodiments, the predetermined temperature in step 101 is 30 ℃ to 100 ℃.
In some preferred embodiments, referring to fig. 2, before spraying the slurry on the surface of the core rod, the method further comprises the following steps of:
201: uniformly mixing an aqueous adhesive and silicon dioxide powder to obtain a mixture;
202: measuring the viscosity of the mixture;
203: judging whether the viscosity of the mixture reaches a set viscosity or not, wherein the set viscosity can be set according to actual preparation requirements;
if yes, then go to 204; otherwise, go to 205;
204: completing the preparation of the slurry;
205: water is added to the mixture and returned to 202.
In some preferred embodiments, the mass fraction of the silica powder in the slurry is 50% to 80%.
Whether or not water is added to the slurry at the time of preparation, and the amount of water added, are determined based on the desired set viscosity of the slurry.
In some preferred embodiments, step 103 may be performed by placing the porous preform in a vacuum environment, such as a vacuum furnace, wherein the dehydroxylation temperature may be selected to be 1200 ℃ to 1300 ℃ and the vitrification temperature may be selected to be 1500 ℃ to 1600 ℃.
In some preferred embodiments, referring to fig. 3, the step of spraying the slurry on the surface of the core rod to obtain the colloidal preform comprises the following steps:
301: driving the core rod to rotate around the axis of the core rod;
302: completing one-time slurry spraying from one end of the core rod to the other end of the core rod along the axial direction of the core rod;
303: and repeating the slurry spraying for a plurality of times to obtain the colloidal prefabricated rod.
In this embodiment, during spraying, the mandrel is rotated to ensure uniform coating in the axial direction of the mandrel, and at the same time, the entire mandrel is completely coated by spraying from one end of the mandrel to the other end of the mandrel.
In the embodiment, the core rod can be vertically or transversely arranged, and the spraying is performed in the vertical direction or in the horizontal direction; also, the mandrel may be selected not to move, by moving the nozzle for spraying, or the nozzle may be selected not to move, by moving the mandrel for spraying.
In some preferred embodiments, the spray flow rate Q is calculated using the following equation:
Q＝π×D×d×h×w×n
wherein D is the diameter of the core rod, D is the width of the nozzles used in the spraying, h is the thickness of the spraying, w is the rotational speed of the core rod, and n is the number of nozzles used in the spraying.
Generally, the thickness of each layer sprayed is 50 to 200 μm.
In some preferred embodiments, referring to fig. 4, several passes of spraying of the slurry are repeated, including the steps of:
401: measuring the spraying weight;
402: judging whether the spraying weight reaches a preset weight or not, wherein the preset weight can be set according to actual preparation requirements;
if yes, entering 403; otherwise, enter 404;
403: performing glue discharging treatment;
404: spraying is again performed and returns to 401.
In this embodiment, the number of times of spraying again in step 404 may be determined according to the difference between the measured spraying weight and the preset weight, and may be one time or multiple times.
In some preferred embodiments, referring to fig. 5, the gel removal process is performed on the colloidal preform, and comprises the following steps:
501: placing the colloid prefabricated rod in a glue removing device, and carrying out water removal treatment on the colloid prefabricated rod at the temperature of 80-120 ℃ for 0.5-2 h;
502: and carrying out primary heat treatment on the colloid prefabricated rod in an oxygen atmosphere to oxidize the aqueous adhesive. In the step, pure oxygen can be adopted, or air can be used, and the temperature of the first heat treatment can be set to be 500-600 ℃, and the temperature is kept for 1-4 h;
in this step, the aqueous binder reacts with oxygen to form e.g. H2O、CO2、NO2And the like.
503: and carrying out secondary heat treatment on the colloidal preform, wherein the temperature of the secondary heat treatment is higher than that of the primary heat treatment, the temperature of the secondary heat treatment can be set to be 1200-1300 ℃ in the step, and the temperature is kept for 1-4 h, and the purpose of the step is to strengthen the strength of the colloidal preform.
Referring to fig. 6, an embodiment of the present application further provides a spraying apparatus for preparing an optical fiber preform, which includes a clamping mechanism 1, a spraying mechanism 3, and a driving mechanism, wherein the clamping mechanism 1 has two rotating chucks 10 disposed opposite to each other, and clamping portions for clamping a mandrel 2 are disposed on opposite wall surfaces of the two rotating chucks 10; the spray mechanism 3 has a nozzle 30, the nozzle 30 faces the core rod 2, the nozzle 30 is used for spraying the slurry on the core rod 2; actuating mechanism all links to each other with spraying mechanism 3 and fixture 1, and actuating mechanism is used for: the two rotary chucks 10 are driven to drive the core rod 2 to rotate around the axis of the core rod, the spraying mechanism 3 and the clamping mechanism 1 are driven to move relatively along the axis direction of the core rod 2, and the spraying mechanism 3 is driven to spray slurry towards the core rod 2.
The spraying apparatus according to the present embodiment can be applied to the above-described embodiments of the method for manufacturing an optical fiber preform to spray a core rod.
In some preferred embodiments, the spray coating device further comprises a heating mechanism having a heating region, and the region between the two chucks 10 and the heating region at least partially overlap each other. In this embodiment, a heating mechanism is provided to facilitate the solidification of the slurry on the surface of the core rod.
Referring to fig. 6, in some preferred embodiments, the heating mechanism includes a hot air blower and an air duct, the air duct is provided with an air distribution grid 4, and hot air provided by the hot air blower passes through the air duct and is blown from the air distribution grid 4 to the mandrel 2.
Referring to fig. 6, in some preferred embodiments, the spraying device further includes a main body 5, the clamping mechanism 1 and the spraying mechanism 3 are assembled on the main body 5, the air duct of the heating mechanism is formed in the main body 5, the air distribution grid 4 is located on the surface of the main body 5, and an exhaust hood 6 is further disposed on a side of the clamping mechanism 1 away from the air distribution grid 4.
Referring to fig. 6, in some preferred embodiments, the spraying mechanism 3 is movably assembled on the main body 5, and the driving mechanism drives the spraying mechanism 3 to move so as to spray the whole core rod 2.
In some preferred embodiments, the spraying device further comprises a weighing unit (not shown in the figures) which is connected to the clamping mechanism 1 and is used to weigh the slurry sprayed on the mandrel 2.
The weighing unit is arranged in the embodiment, so that the weight of the slurry sprayed on the core rod 2 can be measured in real time, and the control of the number of spraying passes is facilitated.
In a word, this application can use natural quartz sand or industry by-product SiO2 powder as raw materials, avoids using poisonous and harmful raw materials such as poisonous and harmful silicon tetrachloride, chlorine in the optical fiber perform manufacturing process, and the production process does not have poisonous and harmful gas to produce, and exhaust-gas treatment need not to use alkaline liquid to carry out neutralization, whole production process green. The raw material is non-corrosive and is molded at low temperature, so the requirement of the equipment on the material is lower, the manufacturing cost of the equipment is lower, and the equipment is easy to maintain. The method has the advantages that the used raw materials are easy to obtain, and the raw material collection rate in the production process is high, so the production cost of the optical fiber preform is low.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of fabricating an optical fiber preform, comprising the steps of:
spraying slurry on the surface of the core rod at a preset temperature to obtain a colloid prefabricated rod, wherein the slurry comprises silicon dioxide powder and an aqueous adhesive;
carrying out glue discharging treatment on the colloidal preform to obtain a porous preform;
and carrying out dehydroxylation and vitrification treatment on the porous prefabricated rod to obtain the optical fiber prefabricated rod.
2. The method for fabricating an optical fiber preform according to claim 1, further comprising the step of preparing the slurry before spraying the slurry onto the surface of the core rod, by:
uniformly mixing the aqueous adhesive and the silicon dioxide powder to obtain a mixture;
measuring the viscosity of the mixture and judging whether the viscosity of the mixture reaches a set viscosity;
if so, finishing the preparation of the slurry; otherwise, adding water to the mixture and returning to the step of measuring the viscosity of the mixture.
3. A method of fabricating an optical fiber preform according to claim 1, wherein:
in the slurry, the mass fraction of the silicon dioxide powder is 50-80%; and/or the presence of a gas in the gas,
the aqueous adhesive comprises at least one of polyvinyl alcohol aqueous adhesive, ethylene acetate aqueous adhesive, acrylic acid aqueous adhesive, polyurethane aqueous adhesive and epoxy aqueous adhesive; and/or the presence of a gas in the gas,
the temperature of the dehydroxylation is 1200-1300 ℃, and the vitrification temperature is 1500-1600 ℃.
4. A method for fabricating an optical fiber preform according to claim 1, wherein the step of spraying the slurry toward the surface of the core rod to obtain a colloidal preform comprises the steps of:
driving the core rod to rotate around the axis of the core rod;
completing one-time slurry spraying from one end of the core rod to the other end of the core rod along the axial direction of the core rod;
and repeating the slurry spraying for a plurality of times to obtain the colloidal prefabricated rod.
5. A method of fabricating an optical fiber preform according to claim 4 wherein the slurry is applied in a plurality of passes, comprising the steps of:
measuring the spraying weight and judging whether the spraying weight reaches a preset weight;
if yes, the step of glue discharging treatment is carried out; otherwise, spraying is carried out again, and the step of measuring the spraying weight is returned.
6. A method for fabricating an optical fiber preform according to claim 4 wherein the spray flow rate Q is calculated using the following formula:
Q＝π×D×d×h×w×n
wherein D is the diameter of the mandrel, D is the width of the nozzles used in the spraying, h is the thickness of the spraying, w is the rotational speed of the mandrel, and n is the number of nozzles used in the spraying.
7. A method for fabricating an optical fiber preform according to claim 1, wherein the gel removal process is performed on the gel preform, comprising the steps of:
carrying out water removal treatment on the colloidal preform;
and carrying out first heat treatment on the colloid prefabricated rod in an oxygen atmosphere to oxidize the aqueous adhesive.
8. The method for fabricating an optical fiber preform according to claim 7, further comprising the steps of, after the first heat treatment is completed:
and carrying out secondary heat treatment on the colloidal preform, wherein the temperature of the secondary heat treatment is higher than that of the primary heat treatment.
9. A spray coating apparatus for preparing an optical fiber preform, comprising:
the mandrel clamping device comprises a clamping mechanism (1), wherein the clamping mechanism (1) is provided with two rotating chucks (10) which are arranged oppositely, and clamping parts for clamping a mandrel (2) are arranged on opposite wall surfaces of the two rotating chucks (10);
a spray mechanism (3) having a nozzle (30), the nozzle (30) facing the core rod (2);
the driving mechanism is connected with the spraying mechanism (3) and the clamping mechanism (1), and is used for: the two rotary chucks (10) are driven to drive the core rod (2) to rotate around the axis of the core rod, the spraying mechanism (3) and the clamping mechanism (1) are driven to move relatively along the axis direction of the core rod (2), and the spraying mechanism (3) is driven to spray slurry towards the core rod (2).
10. A spray apparatus for fabricating an optical fiber preform according to claim 9, wherein:
the spraying device also comprises a heating mechanism, wherein the heating mechanism is provided with a heating area, and the area between the two chucks (10) and the heating area are at least partially overlapped with each other; and/or the presence of a gas in the gas,
the spraying device further comprises a weighing unit, wherein the weighing unit is connected with the clamping mechanism (1) and is used for weighing the weight of the slurry sprayed on the core rod (2).
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Citations (4)
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|---|---|---|---|---|
| JPH04124044A (en) * | 1990-09-15 | 1992-04-24 | Furukawa Electric Co Ltd:The | Production of quartz-based glass preform |
| US5711903A (en) * | 1993-11-15 | 1998-01-27 | The Furukawa Electric Co., Ltd. | Method of manufacturing a porous preform for an optical fiber |
| JP2001294440A (en) * | 2000-04-06 | 2001-10-23 | Shin Etsu Chem Co Ltd | Method for manufacturing preform ingot for optical fiber and preform for optical fiber obtained by processing this preform ingot |
| CN112939445A (en) * | 2021-03-30 | 2021-06-11 | 北京工业大学 | Doped quartz optical fiber preform and preparation method thereof |
-
2020
- 2020-10-13 CN CN202011090839.0A patent/CN112340978A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04124044A (en) * | 1990-09-15 | 1992-04-24 | Furukawa Electric Co Ltd:The | Production of quartz-based glass preform |
| US5711903A (en) * | 1993-11-15 | 1998-01-27 | The Furukawa Electric Co., Ltd. | Method of manufacturing a porous preform for an optical fiber |
| JP2001294440A (en) * | 2000-04-06 | 2001-10-23 | Shin Etsu Chem Co Ltd | Method for manufacturing preform ingot for optical fiber and preform for optical fiber obtained by processing this preform ingot |
| CN112939445A (en) * | 2021-03-30 | 2021-06-11 | 北京工业大学 | Doped quartz optical fiber preform and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 劳动人事部培训就业局: "《油漆工工艺学》", 28 February 1987, 劳动人事出版社 * |
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