CN218841981U - Coating device for optical fiber drawing process - Google Patents
Coating device for optical fiber drawing process Download PDFInfo
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- CN218841981U CN218841981U CN202223379972.5U CN202223379972U CN218841981U CN 218841981 U CN218841981 U CN 218841981U CN 202223379972 U CN202223379972 U CN 202223379972U CN 218841981 U CN218841981 U CN 218841981U
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- optical fiber
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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
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- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The utility model relates to the technical field of optical fiber coating process, in particular to a coating device for an optical fiber drawing process, which comprises a first coating die, a die holder and a second coating die which are arranged in sequence along the optical fiber movement direction; one sides, close to the die holder, of the first coating die and one side, close to the die holder, of the second coating die are provided with accommodating grooves, heating wires are installed in the accommodating grooves, one side faces, far away from the die holder, of the first coating die and one side face, far away from the die holder, of the second coating die are provided with temperature sensing material equalizing plates used for detecting the internal temperatures of the first confluence cavity and the second confluence cavity, and the temperature sensing material equalizing plates and the heating wires are connected with an external control circuit; the whole height of the die can be reduced, the distance of the optical fiber passing through the die is shortened, the shaking condition in the coating process of the die is reduced, the temperature-sensing material homogenizing plate can also have a certain guiding effect on the flowing direction of the coating, the quantity of the coating simultaneously supplied to the peripheral sides of the optical fiber is consistent, and the coating precision is further improved.
Description
Technical Field
The utility model relates to an optical fiber drawing technology technical field particularly relates to optical fiber drawing technology's coating device.
Background
When the glass optical fiber is drawn out by the preform, in order to prevent the glass optical fiber from being polluted by dust, the ultraviolet light-cured elastic coating is required, the surface of the optical fiber can be protected from being scratched by damp gas and external force, the optical fiber is endowed with the performance of improving the microbending resistance, the microbending additional loss function of the optical fiber is reduced, the coating layer comprises two layers, the inner layer is made of low-modulus high-molecular materials and is called a primary coating, the outer layer is made of high-modulus high-molecular materials and is called a secondary coating, and the coating of the optical fiber is generally applied through a coating mold.
Because the optical fiber coating process is to realize primary coating and secondary coating at different path positions, a coating layer needs to be cured by UV irradiation after the primary coating, and the temperature of a coating material needs to be kept constant in the coating process, a circulating hot water device is generally adopted to keep the temperature at present, the existing optical fiber coating device has a longer distance on the path of an optical fiber due to the relatively large volume of the circulating hot water, and the longer path increases the instability of the optical fiber on the coating path, thereby affecting the coating precision.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the first aspect of the utility model provides a coating device for an optical fiber drawing process, which comprises a first coating die, a die holder and a second coating die which are arranged in sequence along the optical fiber movement direction;
a first die hole is formed in the middle of the first coating die, a first confluence cavity communicated with the first die hole is formed in the upper end face of the first coating die, and a first flow passage communicated with the first confluence cavity is formed in the side wall of the first coating die;
the die holder is fixedly arranged between the first coating die and the second coating die, an annular cavity is formed in the middle of the die holder, and an annular UV curing lamp for curing the first coating is fixedly arranged in the annular cavity;
a second die hole is formed in the middle of the second coating die, a second confluence cavity communicated with the second die hole is formed in the lower end face of the second coating die, and a second runner port communicated with the second confluence cavity is formed in the side wall of the second coating die;
the first die cover plate is covered and fixed at the top of the first coating die, and a first cover plate hole for the optical fiber to pass through is formed in the middle of the first die cover plate;
the second die cover plate is fixedly covered at the bottom of the second coating die, and a second cover plate hole for the optical fiber to pass through is formed in the middle of the second die cover plate;
a first coating material supply pipe, one end of which is communicated with the first flow passage, and the other end of which is connected with a material supply device of the first coating;
one end of the second coating material supply pipe is communicated with the second flow passage, and the other end of the second coating material supply pipe is connected with a material supply device of a second coating;
the temperature sensing material equalizing plate is used for detecting the internal temperature of the first confluence cavity and the second confluence cavity, and the temperature sensing material equalizing plate and the heating wire are connected with an external control circuit.
Preferably, the first manifold cavity and the second manifold cavity are both arranged in a disc shape, and the thickness of the first manifold cavity and the thickness of the second manifold cavity are both smaller than 1mm.
Preferably, the temperature sensing material equalizing plate comprises a first-stage temperature sensing material equalizing plate, a second-stage temperature sensing material equalizing plate and a third-stage temperature sensing material equalizing plate which are arranged in the first confluence cavity/the second confluence cavity from outside to inside along the radial direction, and the number of the first-stage temperature sensing material equalizing plate, the number of the second-stage temperature sensing material equalizing plate and the number of the third-stage temperature sensing material equalizing plate are sequentially increased.
Preferably, the temperature sensing material equalizing plates are distributed around the first die hole/the second die hole in a centrosymmetric manner.
Preferably, the guide directions of the temperature sensing material equalizing plates point to the first die hole/the second die hole.
Preferably, the temperature sensing homogenizing plate comprises a film type temperature sensor.
Preferably, the heating wires are spirally distributed in the first coating die/the second coating die.
Preferably, the first flow channel opening is communicated with the first manifold chamber, and the second flow channel opening is communicated with the second manifold chamber through a flow collecting channel, and the cross section of the flow collecting channel is in the shape of an arc.
Preferably, the height of the first flow passage opening is lower than that of the first confluence cavity, and the height of the second flow passage opening is lower than that of the second confluence cavity.
Preferably, the diameter of the second die orifice is greater than the diameter of the first die orifice.
Compared with the prior art, the utility model discloses a be used for coating device of optic fibre wire drawing technology's showing the advantage and lie in:
the utility model provides a coating device for optic fibre wire drawing technology, set up the mould of oblate cylinder, first mould wherein, die holder and second mould distribute in proper order on following the wire drawing direction, set up the temperature sensing equalizer plate in the inside in confluence chamber simultaneously, can make the whole high reduction of mould, optic fibre passes through the distance of mould and shortens, with the condition of rocking in the coating process that reduces through the mould, the temperature sensing equalizer plate can also have certain guide effect to the flow direction of coating, the coating quantity that makes optic fibre week side supply with simultaneously is unanimous, further improve the coating precision.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic side view of a coating apparatus for an optical fiber drawing process according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a coating apparatus for an optical fiber drawing process according to an embodiment of the present invention;
FIG. 3 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 2;
fig. 4 is a schematic sectional view in the direction B-B in fig. 2.
Detailed Description
For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.
According to the utility model discloses a coating device for optic fibre wire drawing technology for among the wire drawing coating technology of optic fibre production, aim at reducing the length of coating mould in the wire drawing direction, make wire drawing coating in-process reduce because of the skew causes the inhomogeneous condition of coating.
The coating apparatus for an optical fiber drawing process of the exemplary embodiment shown in connection with fig. 1 and 2 includes a first coating die 1, a die holder 3, and a second coating die 4, which are sequentially disposed in a moving direction of an optical fiber.
As shown in fig. 2, a first die hole 101 is formed in the middle of the first coating die 1, a first manifold chamber 102 communicated with the first die hole 101 is formed in the upper end surface, and a first runner port 103 communicated with the first manifold chamber 102 is formed in the side wall.
Wherein, 2 lids of first mould apron close the top of fixing at first coating mould 1, 2 week sides of first mould apron have the ladder groove, can clamp on first coating mould 1, its week side adopts the fix with screw, and intermediate position department sets up the first apron hole 201 that supplies optic fibre to pass through, can close the upper end lid in first convergent cavity 102, and make the optic fibre wire drawing in-process can loop through first apron hole 201, first convergent cavity 102 and first mould hole 101, the coating forms first coating on the exterior wall of bare fiber.
Specifically, as shown in fig. 1, in order to fill the first converging chamber 102 with the first coating, the first flow channel port 103 is communicated with one end of the first coating supply pipe 6, and the other end of the first coating supply pipe 6 is connected to the first coating supply device, so that the coating can be pumped into the first converging chamber 102 at a constant pressure all the time in the optical fiber drawing production process, and the coating is uniformly coated on the outer wall of the bare optical fiber.
Further, as shown in fig. 4, the die holder 3 is fixedly arranged between the first coating die 1 and the second coating die 4, and has an annular cavity at the middle position, and an annular UV curing lamp 8 for curing the first coating is fixedly arranged in the annular cavity.
The die holder 3 comprises a first die holder 31 and a second die holder 32 which are arranged in an up-and-down symmetrical mode, the annular UV curing lamp 8 is clamped between the first die holder 31 and the second die holder 32, the annular UV curing lamp 8 can emit ultraviolet rays to a middle cavity part, and a first coating coated on the outer layer of the bare optical fiber is cured.
Specifically, the first die holder 31 and the first coating die 1 are fixed by screws, the second die holder 32 and the second coating die 4 are also fixed by screws, the electric heating wire 9 can be disassembled and preassembled, and after the electric heating wire 9 is assembled, the first die holder 31 and the second die holder 32 are fixed by matching bolts and nuts 33.
Further, a second die hole 401 is formed in the middle of the second coating die 4, a second manifold cavity 402 communicated with the second die hole 401 is formed in the lower end face of the second coating die, and a second runner opening 403 communicated with the second manifold cavity 402 is formed in the side wall of the second coating die;
wherein, second mould apron 5 lid closes and fixes the bottom at second coating mould 4, week side of second mould apron 5 has the ladder groove, can clamp on second coating mould 4, week side adopts the fix with screw, and intermediate position department sets up the second apron hole 501 that supplies optic fibre to pass through, can close the lower extreme lid in second converging cavity 402, and make the optic fibre wire drawing in-process can loop through second mould hole 401, second converging cavity 402 and second apron hole 501, continue to coat on the exterior wall of the optic fibre that has the first coating of coating, form the second coating.
Specifically, as shown in fig. 1, in order to fill the second manifold 402 with the second coating material, one end of the second coating material supply pipe 7 is disposed to communicate with the second flow channel opening 403, the other end is connected to a second coating material supply device, and the diameter of the second die hole 401 is larger than that of the first die hole 101, so that the second coating material can be pumped into the second manifold 402 at a constant pressure during the optical fiber drawing production process, and the second coating material is formed on the outer wall of the optical fiber coated with the first coating material.
Further, the accommodating groove 901 is formed in one side, close to the die holder 3, of the first coating die 1 and the second coating die 4, the heating wire 9 is installed in the accommodating groove 901, a side face, far away from the die holder 3, of the first coating die 1 and the second coating die 4 is provided with a temperature sensing material equalizing plate 91 for detecting the internal temperature of the first converging cavity 102 and the second converging cavity 402, and the temperature sensing material equalizing plate 91 and the heating wire 9 are connected with an external control circuit.
The temperature sensing material equalizing plate 91 is a film type temperature sensor, such as a film platinum resistor temperature sensor, and has the characteristics of good stability and high accuracy, the temperature sensing material equalizing plate can detect the temperature of the coating inside the first manifold cavity 102 and the second manifold cavity 402 in real time, and can feed the temperature back to an external control circuit, and the external control circuit can adjust the temperature of the electric heating wire 9 in time according to the temperature change, so that the temperature inside the first manifold cavity 102 and the second manifold cavity 402 is always kept within a preset value range.
In a preferred embodiment, the first manifold cavity 102 and the second manifold cavity 402 are both arranged in a disc shape, the first coating die 1, the die holder 3 and the second coating die 4 are also widened in the radial direction, and the axial height is shortened, because the temperature sensing material equalizing plate 91 and the heating wires 9 are all arranged in the horizontal direction, and the temperature sensing material equalizing plate 91 is arranged in the first manifold cavity 102 and the second manifold cavity 402, which are both less than 1mm in thickness, the overall height of the die is reduced, and the distance of the optical fibers passing through the die is shortened.
Therefore, the shaking condition in the coating process through the die is reduced, and the coating precision and quality are improved.
As shown in fig. 3, the temperature sensing material equalizing plate 91 further includes a first-stage temperature sensing material equalizing plate 911, a second-stage temperature sensing material equalizing plate 912 and a third-stage temperature sensing material equalizing plate 913 disposed in the first/ second manifold chambers 102, 402 from outside to inside in the radial direction.
As a preferred embodiment, the number of the first-stage temperature sensing material equalizing plate 911, the second-stage temperature sensing material equalizing plate 912, and the third-stage temperature sensing material equalizing plate 913 is increased in sequence.
In a preferred embodiment, the plurality of temperature sensing material equalizing plates 91 are distributed around the first die hole 101/the second die hole 401 in a central symmetry manner, and the guiding directions of the plurality of temperature sensing material equalizing plates 91 all point to the first die hole 101/the second die hole 401.
Thus, the temperature sensing material equalizing plate 91 can detect the temperature of the coating in the first converging cavity 102/the second converging cavity 402, and can also have a certain guiding effect on the flowing direction of the coating, so that the coating can uniformly flow to the die holes in the converging cavity, the quantity of the coating simultaneously supplied to the peripheral sides of the optical fibers is consistent, the effect of uniform coating is achieved, and the coating precision is further improved.
In a preferred embodiment, the heating wires 9 are spirally distributed in the first coating die 1/the second coating die 4, so that heat can be uniformly supplied to the disc-shaped dies, uniform heat distribution inside the first manifold cavity 102/the second manifold cavity 402 is ensured, the flowability of the coating is uniform, and the smoothness of coating supply is improved.
As shown in fig. 2 and 3, the first flow passage opening 103 and the first manifold 102, and the second flow passage opening 403 and the second manifold 402 are communicated with each other through a manifold 01, and the cross section of the manifold 01 is circular arc.
The height of the first runner port 103 is lower than that of the first manifold chamber 102, the height of the second runner port 403 is lower than that of the second manifold chamber 402, the collecting channel 01 comprises a ring aggregation channel 011 connected with one end of the first runner port 103, the collecting channel is vertically distributed upwards, the coating input from one side can be aggregated in the ring aggregation channel 011 in a way of being distributed in a circle, when the coating is aggregated to the top of the ring aggregation channel 011, the coating can flow into a ring current channel 012 communicated with the manifold chamber, the coating is uniformly supplied in the direction of the ring periphery, the coating flowing to a die hole can be uniform, and the uniform supply of the peripheral side during coating is ensured.
Combine above embodiment, through the mould that sets up the oblate cylinder, first mould, die holder 3 and second mould distribute in proper order along the wire drawing direction, set up temperature sensing homocline plate 91 in the inside in confluence chamber simultaneously, can make the whole height of mould reduce, the distance that optic fibre passes through the mould shortens, with the condition that rocks in the coating process that reduces through the mould, temperature sensing homocline plate 91 can also have certain guide effect to the flow direction of coating, the coating quantity that makes optic fibre week side supply simultaneously is unanimous, further improve the coating precision.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (10)
1. A coating device for an optical fiber drawing process is characterized by comprising a first coating die (1), a die holder (3) and a second coating die (4) which are sequentially arranged along the moving direction of an optical fiber;
a first die hole (101) is formed in the middle of the first coating die (1), a first manifold cavity (102) communicated with the first die hole (101) is formed in the upper end face of the first coating die, and a first flow passage opening (103) communicated with the first manifold cavity (102) is formed in the side wall of the first coating die;
the die holder (3) is fixedly arranged between the first coating die (1) and the second coating die (4), an annular cavity is formed in the middle of the die holder, and an annular UV curing lamp (8) for curing a first coating is fixedly arranged in the annular cavity;
a second die hole (401) is formed in the middle of the second coating die (4), a second manifold cavity (402) communicated with the second die hole (401) is formed in the lower end face of the second coating die, and a second flow channel opening (403) communicated with the second manifold cavity (402) is formed in the side wall of the second coating die;
the first die cover plate (2) is fixedly covered on the top of the first coating die (1), and a first cover plate hole (201) for the optical fiber to pass through is formed in the middle of the first die cover plate;
the second die cover plate (5) is fixedly covered at the bottom of the second coating die (4), and a second cover plate hole (501) for the optical fiber to pass through is formed in the middle of the second die cover plate;
a first coating layer feeding pipe (6) with one end communicated with the first flow passage opening (103) and the other end connected with a feeding device of the first coating layer;
a second coating layer supply pipe (7) with one end communicated with the second flow passage (403) and the other end connected with a supply device of the second coating layer;
the temperature sensing material equalizing device comprises a first coating die (1), a second coating die (4), a die holder (3), a containing groove (901), heating wires (9), a temperature sensing material equalizing plate (91) and an external control circuit, wherein the containing groove (901) is formed in one side, close to the die holder (3), of the first coating die (1) and the second coating die (4), the heating wires (9) are installed in the containing groove (901), one side, far away from the die holder (3), of the first coating die (1) and the second coating die (4) is provided with the temperature sensing material equalizing plate (91) used for detecting the internal temperature of the first converging cavity (102) and the second converging cavity (402), and the temperature sensing material equalizing plate (91) and the heating wires (9) are connected with the external control circuit.
2. The coating device for optical fiber drawing process according to claim 1, wherein the first and second manifold chambers (102, 402) are each provided in a disc shape, and the thickness of the first and second manifold chambers (102, 402) is less than 1mm.
3. The coating device for the optical fiber drawing process according to claim 1, wherein the temperature sensing material equalizing plate (91) comprises a first-stage temperature sensing material equalizing plate (911), a second-stage temperature sensing material equalizing plate (912) and a third-stage temperature sensing material equalizing plate (913) which are arranged in the first converging cavity (102)/the second converging cavity (402) from outside to inside in the radial direction, and the number of the first-stage temperature sensing material equalizing plate (911), the number of the second-stage temperature sensing material equalizing plate (912) and the number of the third-stage temperature sensing material equalizing plate (913) are increased in sequence.
4. The coating apparatus for an optical fiber drawing process according to claim 3, wherein a plurality of the temperature sensitive material uniforming plates (91) are centrally symmetrically distributed around the first/second die holes (101/401).
5. The coating apparatus for an optical fiber drawing process according to claim 3, wherein the plurality of temperature sensitive material uniforms plates (91) are each directed toward the first/second die holes (101/401).
6. The coating apparatus for an optical fiber drawing process according to any one of claims 3 to 5, wherein the temperature sensing homogenizing plate (91) includes a thin film type temperature sensor.
7. The coating device for an optical fiber drawing process according to claim 1, wherein the heating wire (9) is spirally distributed within the first coating die (1)/second coating die (4).
8. The coating apparatus for an optical fiber drawing process according to claim 1, wherein the first flow passage opening (103) and the first manifold chamber (102), and the second flow passage opening (403) and the second manifold chamber (402) are communicated with each other through a manifold (01), and the cross section of the manifold (01) is in the shape of a circular arc.
9. The coating device for an optical fiber drawing process according to claim 8, wherein the height of the first flow opening (103) is lower than the height of the first manifold chamber (102), and the height of the second flow opening (403) is lower than the height of the second manifold chamber (402).
10. The coating device for an optical fiber drawing process according to claim 1, wherein the diameter of the second die hole (401) is larger than the diameter of the first die hole (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223379972.5U CN218841981U (en) | 2022-12-05 | 2022-12-05 | Coating device for optical fiber drawing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223379972.5U CN218841981U (en) | 2022-12-05 | 2022-12-05 | Coating device for optical fiber drawing process |
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| Publication Number | Publication Date |
|---|---|
| CN218841981U true CN218841981U (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223379972.5U Active CN218841981U (en) | 2022-12-05 | 2022-12-05 | Coating device for optical fiber drawing process |
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- 2022-12-05 CN CN202223379972.5U patent/CN218841981U/en active Active
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