A coating device for making hidden optical fiber processing based on nylon 12

Abstract

The application belongs to the technical field of optical fiber preparation equipment, and discloses a coating device for preparing invisible optical fiber based on nylon 12. The coating device for preparing invisible optical fiber based on nylon 12 comprises an outer protective shell, a feeding port and a discharging port are arranged on the left side and the right side of the outer protective shell respectively, a rotating drum is movably connected to the middle part of the outer protective shell, and a driving motor is fixedly connected to the outer side of the outer protective shell through a mounting plate. The coating device for preparing invisible optical fiber based on nylon 12 is used in cooperation with a nozzle assembly by using a spraying mechanism, the driven gear and the rotating drum are rotated by driving the driving motor, the coating box, the spraying pipe and the nozzle are rotated, the nozzle is rotated around the optical fiber, the uniformity of spraying is improved, after the nozzle assembly absorbs waste gas and solution vapor, the spraying effect is further improved by further sucking the waste gas and the solution vapor into the spraying pipe through a vacuum air extractor and discharging the waste gas and the solution vapor and pressurizing the nozzle, so that the spraying is more uniform and the spraying effect is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of optical fiber preparation equipment, and particularly relates to a coating device for preparing invisible optical fiber based on nylon 12. BACKGROUND

[0002] Optical fiber is a kind of fiber made of glass or plastic, which can be used as an optical transmission tool. The transmission principle is "total reflection of light", and the insulator of the optical fiber is often a composite system, which includes a bottom coating layer and an outer coating layer. The selectivity of the bottom coating layer coating device is often to provide certain functions, such as thermal stability, direct solderability, solvent resistance and the like. The general bottom coating layer is polyester, polyamide and the like, but the nylon 12 has the characteristics of smaller water absorption, so that the optical fiber can be better protected when the material is used. When the outer coating layer of the optical fiber is coated, the coating device needs to be processed.

[0003] In the use of the existing invisible optical fiber coating device, the traditional coating device cannot ensure the uniform distribution of the coating layer on the surface of the optical fiber, which may cause uneven thickness of the coating layer and affect the performance of the optical fiber. At the same time, the operation environment is not clean, the waste gas and solvent vapor generated in the coating process are not effectively treated, which affects the coating quality and the health of the operators. SUMMARY

[0004] The purpose of the present application is to provide a coating device for preparing invisible optical fiber based on nylon 12, which effectively solves the problem that the existing invisible optical fiber coating device cannot ensure the uniform distribution of the coating layer on the surface of the optical fiber in use, which may cause uneven thickness of the coating layer and affect the performance of the optical fiber. At the same time, the operation environment is not clean, the waste gas and solvent vapor generated in the coating process are not effectively treated, which affects the coating quality and the health of the operators.

[0005] To achieve the above purpose, the following technical scheme is adopted: a coating device for preparing invisible optical fiber based on nylon 12, comprising an outer protective shell, a feeding port and a discharging port are arranged on the left and right sides of the outer protective shell, a rotating drum is movably connected to the middle part of the outer protective shell, a driving motor is fixedly connected to the outer side of the outer protective shell through a mounting plate, a driving wheel is fixedly connected to the output end of the driving motor, a driven gear is meshed with the driving wheel, the driven gear is fixedly connected to the outer side of the rotating drum, a spraying mechanism is arranged on the outer side of the outer protective shell, and a dust removal mechanism is arranged in the outer protective shell.

[0006] The spraying mechanism comprises:

[0007] A storage tank is fixedly connected to the outer side of the outer protective shell.

[0008] A feeding hopper is fixedly connected to the upper surface of the storage tank.

[0009] A connecting pipe is movably connected to the left side of the storage box, and the right end of the connecting pipe is located inside the storage box and is movably sealed to the inside of the storage box by a clamping plate.

[0010] A coating box is fixedly connected to the inside of the rotating drum, and the coating box is connected to the left end of the connecting pipe;

[0011] A spraying pipe, one end of which is fixedly connected to the inside of the coating box;

[0012] The nozzle is fixedly connected to the other end of the spray pipe;

[0013] A baffle, which is fixedly connected to the outside of the spray pipe;

[0014] An interceptor plate is fixedly connected to the inner side of a baffle, and the inner side of the nozzle extends to the inner side of the interceptor plate.

[0015] A nozzle assembly, disposed inside the spray pipe, is used to treat exhaust gases and solution vapors generated during spraying.

[0016] By employing the above technical solution, the device rotates along with the coating box as it follows the rotating drum, causing the spray pipe and nozzle to rotate accordingly. This results in more comprehensive contact between the coating and the optical fiber, while simultaneously improving the uniformity and quality of the optical fiber coating.

[0017] Preferably, a cylinder is fixedly connected inside the outer protective shell, one end of a telescopic rod is fixedly connected to the output end of the cylinder, a pressure ring is fixedly connected to the other end of the telescopic rod, one end of a positioning rod is fixedly connected to the inner wall of the outer protective shell, and a positioning ring is movably connected to the other end of the positioning rod via a pin.

[0018] The above technical solution uses a cylinder to drive a telescopic rod to move, further driving the laminating ring and changing its inner diameter. This allows for easy adjustment based on the fiber coating thickness, making it convenient to use and preventing damage to the fiber coating from the laminating ring being unable to move.

[0019] Preferably, the dust removal mechanism comprises a connecting rod, one end of the connecting rod is fixedly connected to the inner side of the rotating drum, the other end of the connecting rod is fixedly connected with a movable rod, the outer side of the movable rod is movably connected to the inner side of a guide groove arranged on the outer protective shell, one end of a support rod is fixedly connected to the inner wall of the outer protective shell, the other end of the support rod is fixedly connected with a dust removal box, the inner wall of the dust removal box is fixedly connected with a partition plate, the other end of the connecting rod extends to the inner side of the dust removal box through the dust removal box and is fixedly connected with a dust removal brush, a liquid outlet cavity is arranged in the middle of the connecting rod and is arranged in the inner side of the dust removal box, the bottom end of the liquid outlet cavity is in contact with the dust removal brush, a fixed block is fixedly connected to the right side of the dust removal box, the fixed block is fixedly connected with a drying box, and the inner side of the drying box is provided with a heating wire.

[0020] Through the above technical scheme, the dust removal box in the dust removal mechanism of the application contains cleaning liquid, the connecting rod and the movable rod are rotated by the rotating drum, thereby generating centrifugal force, the liquid in the dust removal box is thrown out and contacts the dust removal brush to remove the dust on the outer surface of the optical fiber, and then the water stains are removed by the drying box, thereby preventing the dust from affecting the coating effect, and further improving the coating effect.

[0021] Preferably, the nozzle assembly comprises an air inlet pipe, a vacuum air extractor, a sealing box, a sealing sheet, a return spring and a discharge hole, one end of the air inlet pipe is fixedly connected to the inner side of the intercepting plate, the other end of the air inlet pipe extends to the inner side of the spraying pipe through the spraying pipe and is fixedly connected with the sealing box, the inner side of the sealing box is fixedly connected with the vacuum air extractor, the air inlet of the vacuum air extractor is connected with the air inlet pipe, the sealing sheet is movably connected to the lower surface of the sealing box through a through hole, the outer side of the sealing sheet is sleeved with the return spring, and the lower surface of the sealing box is provided with the discharge hole.

[0022] Through the above technical scheme, the waste gas and solution vapor generated after the solution sprayed by the nozzle is coated are sucked by the cooperation of the air inlet pipe and the vacuum air extractor of the nozzle assembly, thereby avoiding the influence of the waste gas and solution vapor on the spraying effect and the health of the workers.

[0023] Preferably, the intercepting plate is arranged as an annular plate, and arc-shaped bends are arranged on the left and right sides of the intercepting plate, and the bending directions are towards the nozzle.

[0024] Preferably, the top end of the sealing box is arranged as a conical shape and the conical head is towards the coating box.

[0025] Preferably, the liquid outlet cavity is arranged as a Y shape, and the top end of the liquid outlet cavity is arranged in the inner side of the dust removal box and is in communication with the inside of the dust removal box.

[0026] Through the technical scheme, the Y-shaped liquid outlet cavity is arranged to stir the liquid in the dust removal box when the movable rod rotates, and the centrifugal force generated at the same time can throw part of the liquid out and make the liquid fully contact with the dust removal brush through the liquid outlet cavity.

[0027] Preferably, the spraying pipes are arranged in four, and the four spraying pipes are arranged in a ring around the inside of the coating box with the middle axis of the coating box as the reference.

[0028] Through the technical scheme, the multiple spraying pipes are used to spray the outer wall of the optical fiber, which facilitates the all-around spraying, and the relative position between the spraying pipe and the optical fiber can be changed according to the rotation of the rotating drum, so that the optical fiber coating is more uniform.

[0029] Preferably, the pressure layer ring is designed in layers, the inside of the pressure layer ring is connected with a movable plate through a cavity, and the outside of the movable plate is in contact with the edge of the pressure layer ring, so as to change the diameter of the pressure layer ring by following the change of the movement of the pressure layer ring.

[0030] Through the technical scheme, the movable plate follows the movement of the pressure layer ring to form a ring with a diameter that can be changed, which facilitates the adjustment of different thickness requirements.

[0031] Through the foregoing technical scheme, the present application has the following advantages:

[0032] 1. The coating device for processing invisible optical fiber based on nylon 12 uses the spraying mechanism and nozzle assembly, the driving motor drives the driving wheel to rotate the driven gear and the rotating drum, and then rotates the coating box, spraying pipe and nozzle to rotate the nozzle around the optical fiber for spraying, improving the uniformity of spraying. After the exhaust gas and solution vapor are absorbed by the nozzle assembly, they are further sucked into the spraying pipe by the vacuum air extractor and then discharged to pressurize the nozzle and further improve the spraying effect, making the spraying more uniform and improving the spraying effect.

[0033] 2. The coating device for processing invisible optical fiber based on nylon 12 uses the dust removal box, dust removal brush and drying box of the dust removal assembly, the liquid in the dust removal box is absorbed by the dust removal brush to rotate and remove dust from the surface of the optical fiber, and then the wet stains are removed in the drying box to avoid the influence of dust on the surface of the optical fiber on the spraying effect.

[0034] 3. The coating device for processing invisible optical fiber based on nylon 12 uses the nozzle assembly to absorb the exhaust gas and solution vapor generated by the solution sprayed from the nozzle by the vacuum air extractor, avoiding the situation that the exhaust gas and solution vapor are discharged to be inhaled by the operator, affecting the health of the operator. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a perspective view of the present application;

[0036] Figure 2 is a front view of the present application;

[0037] Figure 3 is a top view of the present application;

[0038] Figure 4 is a sectional view at A-A of the present application; Figure 3

[0039] Figure 5 is an enlarged perspective view at B of the present application; Figure 4

[0040] Figure 6 is an enlarged view at C of the present application. Figure 4

[0041] In the figure: 1 outer protective shell, 2 feeding port, 3 discharging port, 4 rotating drum, 5 driving motor, 6 driving wheel, 7 driven tooth, 8 spraying mechanism, 81 storage box, 82 feeding hopper, 83 connecting pipe, 84 coating box, 85 spraying pipe, 86 nozzle, 87 baffle, 88 intercepting plate, a nozzle assembly, a1 air inlet pipe, a2 vacuum air extractor, a3 sealing box, a4 sealing sheet, a5 return spring, a6 discharge hole, 9 dust removal mechanism, 91 connecting rod, 92 movable rod, 93 supporting rod, 94 dust removal box, 95 partition, 96 liquid outlet cavity, 97 dust removal brush, 98 fixed block, 99 drying box, 910 heating wire, 10 air cylinder, 11 telescopic rod, 12 pressing ring, 13 positioning rod, 14 positioning ring. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0043] ​​​In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] Please refer to Figures 1-6 The present application provides a technical scheme: a coating device for processing of invisible optical fiber based on nylon 12, comprising an outer protective shell 1, the left and right sides of the outer protective shell 1 are respectively provided with a feeding port 2 and a discharging port 3, the middle part of the outer protective shell 1 is movably connected with a rotating drum 4, the outer side of the outer protective shell 1 is fixedly connected with a driving motor 5 through a mounting plate, the output end of the driving motor 5 is fixedly connected with a driving wheel 6, the driving wheel 6 is meshingly connected with a driven gear 7, the driven gear 7 is fixedly connected to the outer side of the rotating drum 4, the outer side of the outer protective shell 1 is provided with a spraying mechanism 8, and the inside of the outer protective shell 1 is provided with a dust removal mechanism 9;

[0046] The spraying mechanism 8 comprises:

[0047] The storage tank 81 is fixedly connected to the outer side of the outer protective shell 1;

[0048] The feeding hopper 82 is fixedly connected to the upper surface of the storage tank 81;

[0049] The connecting pipe 83 is movably connected to the left side of the storage tank 81, and the right end of the connecting pipe 83 is arranged in the inside of the storage tank 81 and movably sealed to the inside of the storage tank 81 through a clamping plate;

[0050] The coating box 84 is fixedly connected to the inside of the rotating drum 4, and the coating box 84 is connected in communication with the left end of the connecting pipe 83;

[0051] Spraying pipe 85, one end of spraying pipe 85 is fixedly connected to the inside of coating box 84;

[0052] Nozzle 86, nozzle 86 is fixedly connected to the other end of spraying pipe 85;

[0053] Baffle 87, baffle 87 is fixedly connected to the outside of spraying pipe 85;

[0054] Intercepting plate 88, intercepting plate 88 is fixedly connected to the inside of baffle 87, and the inside of nozzle 86 extends to the inside of intercepting plate 88;

[0055] Nozzle assembly a, nozzle assembly a is arranged inside spraying pipe 85, for treating waste gas and solution vapor generated by spraying.

[0056] Through the above technical scheme, when the coating box 84 rotates with the rotating drum 4, the device rotates the spraying pipe 85 and the nozzle 86 according to the rotating coating box 84, so that the coating is more fully contacted with the optical fiber, and the uniformity of the optical fiber coating and the quality of the coating are improved.

[0057] Referring to Figure 4 The inside of outer protective shell 1 is fixedly connected with air cylinder 10, one end of telescopic rod 11 is fixedly connected with the output end of air cylinder 10, the other end of telescopic rod 11 is fixedly connected with pressure layer ring 12, one end of positioning rod 13 is fixedly connected with the inner wall of outer protective shell 1, the other end of positioning rod 13 is movably connected with positioning ring 14 through a pin column, air cylinder 10 drives telescopic rod 11 to move to further drive pressure layer ring 12, so as to change the inner diameter of pressure layer ring 12, which is convenient for adjusting according to the thickness of the optical fiber coating, convenient to use, and avoids the damage of the optical fiber coating caused by the immobility of pressure layer ring 12.

[0058] Referring to Figure 4 , 6As shown, the dust removal mechanism 9 comprises a connecting rod 91, one end of the connecting rod 91 is fixedly connected to the inner side of the rotating drum 4, the other end of the connecting rod 91 is fixedly connected to a movable rod 92, the outer side of the movable rod 92 is movably connected to the inner side of the guide groove provided on the outer protective shell 1, the inner wall of the outer protective shell 1 is fixedly connected to one end of a supporting rod 93, the other end of the supporting rod 93 is fixedly connected to a dust removal box 94, the inner wall of the dust removal box 94 is fixedly connected to a partition plate 95, the other end of the connecting rod 91 extends to the inner side of the dust removal box 94 through the dust removal box 94 and is fixedly connected to a dust removal brush 97, the middle part of the connecting rod 91 is provided with a liquid outlet cavity 96, and the liquid outlet cavity 96 is arranged on the inner side of the dust removal box 94, and the bottom end of the liquid outlet cavity 96 is in contact with the dust removal brush 97, the right side of the dust removal box 94 is fixedly connected to a fixed block 98, the fixed block 98 is fixedly connected to a drying box 99, the inner side of the drying box 99 is provided with heating wires 910, and the dust removal box 94 in the dust removal mechanism 9 contains cleaning liquid. The connecting rod 91 and the movable rod 92 are driven to rotate by the rotating drum 4, so as to generate centrifugal force, and the liquid in the dust removal box 94 is thrown out and contacts the dust removal brush 97 to remove the dust on the outer surface of the optical fiber, and then the water stains are removed by the drying box 99, so as to prevent the dust from affecting the coating effect, thereby further improving the coating effect.

[0059] Referring to Figure 4 , 5 As shown, the nozzle assembly a comprises an air inlet pipe a1, a vacuum air extractor a2, a sealing box a3, a sealing sheet a4, a return spring a5 and a discharge hole a6, one end of the air inlet pipe a1 is fixedly connected to the inner side of the intercepting plate 88, the other end of the air inlet pipe a1 extends to the inner side of the spraying pipe 85 through the spraying pipe 85 and is fixedly connected to the sealing box a3, the inner side of the sealing box a3 is fixedly connected to the vacuum air extractor a2, and the air inlet of the vacuum air extractor a2 is connected to the air inlet pipe a1, the lower surface of the sealing box a3 is movably connected to the sealing sheet a4 through a through hole, the outer side of the sealing sheet a4 is sleeved with the return spring a5, and the lower surface of the sealing box a3 is provided with the discharge hole a6. The cooperation of the air inlet pipe a1 and the vacuum air extractor a2 provided by the nozzle assembly a can suck and remove the waste gas and solution vapor generated after the solution sprayed by the nozzle 86 is coated, so as to avoid the influence of the waste gas and solution vapor on the spraying effect and the health of the workers.

[0060] Referring to Figure 4 As shown, the intercepting plate 88 is arranged as an annular plate, and the left and right sides of the intercepting plate 88 are both provided with arc-shaped bends, and the bending directions are towards the nozzle 86.

[0061] Referring to Figure 4 , 5 As shown, the top end of the sealing box a3 is arranged in a conical shape and the conical head is towards the coating box 84.

[0062] Referring to Figure 4 , 6As shown, the liquid outlet cavity 96 is arranged in Y shape, and the top end of the liquid outlet cavity 96 is arranged inside the dust removal box 94 and communicates with the inside of the dust removal box 94. The Y-shaped liquid outlet cavity 96 stirs the liquid inside the dust removal box 94 when the movable rod 92 rotates, and cooperates with the centrifugal force generated to throw part of the liquid and make the liquid fully contact with the dust removal brush 97 through the liquid outlet cavity 96.

[0063] Referring to Figure 4 As shown, the spraying pipe 85 is arranged in four, and the four spraying pipes 85 are arranged in a ring around the inside of the coating box 84 with the central axis of the coating box 84 as the reference. The plurality of spraying pipes 85 spray the outer wall of the optical fiber to facilitate omnidirectional spraying, and the relative position between the spraying pipe 85 and the optical fiber can be changed according to the rotation of the rotating drum 4, so that the optical fiber coating is more uniform.

[0064] Referring to Figure 4 As shown, the pressure layer ring 12 is designed in layers, and the inside of the pressure layer ring 12 is connected with a movable plate through a cavity, and the outside of the movable plate is in contact with the edge of the pressure layer ring 12, which is used to change according to the movement of the pressure layer ring 12. Follow, change the diameter of the pressure layer ring 12, the cylinder 10 controls the telescopic rod 11 to move up and down while pulling the pressure layer ring 12 to move, and further moves the movable plate to form a circular ring with a diameter that can be changed by following the movement of the pressure layer ring 12, which is convenient for adjusting the thickness according to different needs.

[0065] The coating device for processing the invisible optical fiber based on nylon 12 works as follows. First, the nylon 12 material is injected into the storage box 81 through the feeding hopper 82, then the driving motor 5 is started to further drive the driven gear 7 to rotate through the driving wheel 6, then the driven gear 7 drives the rotating drum 4 to rotate, further driving the coating box 84, the spraying pipe 85 and the nozzle 86 in the spraying mechanism 8 to rotate, then the optical fiber enters through the feeding port 2, and when passing through the dust removal mechanism 9, the connecting rod 91 rotates following the rotating drum 4, then the connecting rod 91 drives the movable rod 92 to rotate, further driving the dust removal brush 97 to rotate, removing the dust on the outside of the optical fiber through the dust removal brush 97, then the optical fiber enters the inside of the baffle 87 and is coated through the nozzle 86, and the vacuum air extractor a2 is started during the coating process to recover the waste gas generated by the nozzle 86 and discharge it into the sealed box a3, then the top end of the sealing sheet a4 increases the pressure, the sealing sheet a4 opens to discharge the waste gas to the spraying pipe 85 again, and pressurizes the nozzle 86 to improve the coating effect, then the coating is completed, and when passing through the pressure layer ring 12, the cylinder 10 controls the telescopic rod 11 to move to change the diameter of the inside of the pressure layer ring 12 according to the spraying thickness.

[0066] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0067] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coating apparatus for fabricating stealth optical fibers based on nylon 12, comprising an outer protective shell, characterized in that: The outer protective shell has a feed inlet and a discharge outlet on its left and right sides, respectively. A rotating drum is movably connected to the middle of the outer protective shell. A drive motor is fixedly connected to the outer side of the outer protective shell through a mounting plate. A drive wheel is fixedly connected to the output end of the drive motor. A driven gear is meshed with the drive wheel. The driven gear is fixedly connected to the outer side of the rotating drum. A spraying mechanism is provided on the outer side of the outer protective shell. A dust removal mechanism is provided inside the outer protective shell. The spraying mechanism includes: A storage bin, which is fixedly connected to the outside of the outer protective shell; A feeding hopper, which is fixedly connected to the upper surface of the storage box; A connecting pipe is movably connected to the left side of the storage box, and the right end of the connecting pipe is located inside the storage box and is movably sealed to the inside of the storage box by a clamping plate. A coating box is fixedly connected to the inside of the rotating drum, and the coating box is connected to the left end of the connecting pipe; A spraying pipe, one end of which is fixedly connected to the inside of the coating box; The nozzle is fixedly connected to the other end of the spray pipe; A baffle, which is fixedly connected to the outside of the spray pipe; An interceptor plate is fixedly connected to the inner side of a baffle, and the inner side of the nozzle extends to the inner side of the interceptor plate. A nozzle assembly, disposed inside the spray pipe, is used to treat exhaust gas and solution vapor generated during spraying; The nozzle assembly includes an air inlet pipe, a vacuum pump, a sealing box, a sealing sheet, a return spring, and a discharge hole. One end of the air inlet pipe is fixedly connected to the inner side of the interceptor plate. The other end of the air inlet pipe extends through the spray pipe to the inner side of the spray pipe and is fixedly connected to the sealing box. The vacuum pump is fixedly connected to the inner side of the sealing box, and the air inlet pipe is connected to the air inlet of the vacuum pump. A sealing sheet is movably connected to the lower surface of the sealing box through a through hole. A return spring is sleeved on the outer side of the sealing sheet. A discharge hole is provided on the lower surface of the sealing box.

2. The coating apparatus for fabricating stealth optical fibers based on Nylon 12 according to claim 1, characterized in that: A cylinder is fixedly connected inside the outer protective shell. One end of a telescopic rod is fixedly connected to the output end of the cylinder. A pressure ring is fixedly connected to the other end of the telescopic rod. One end of a positioning rod is fixedly connected to the inner wall of the outer protective shell. A positioning ring is movably connected to the other end of the positioning rod via a pin.

3. The coating apparatus for fabricating stealth optical fibers based on Nylon 12 according to claim 2, characterized in that: The dust removal mechanism includes a connecting rod. One end of the connecting rod is fixedly connected to the inner side of the rotating drum, and the other end of the connecting rod is fixedly connected to a movable rod. The outer side of the movable rod is movably connected to the inner side of the guide groove provided in the outer protective shell. One end of the support rod is fixedly connected to the inner wall of the outer protective shell, and the other end of the support rod is fixedly connected to a dust removal box. A partition is fixedly connected to the inner wall of the dust removal box. The other end of the connecting rod extends through the dust removal box to the inner side of the dust removal box and is fixedly connected to a dust removal brush. A liquid outlet chamber is provided in the middle of the connecting rod, and the liquid outlet chamber is located inside the dust removal box. The bottom end of the liquid outlet chamber is in contact with the dust removal brush. A fixing block is fixedly connected to the right side of the dust removal box, and a drying box is fixedly connected to the fixing block. A heating wire is provided inside the drying box.

4. The coating apparatus for fabricating stealth optical fibers based on Nylon 12 according to claim 1, characterized in that: The interceptor plate is configured as an annular plate, and both the left and right sides of the interceptor plate are provided with arc-shaped bends, with the bends facing the nozzle.

5. The coating apparatus for fabricating stealth optical fibers based on Nylon 12 according to claim 4, characterized in that: The top of the sealing box is set in a conical shape with the cone tip facing the coating box.

6. The coating apparatus for fabricating stealth optical fibers based on Nylon 12 according to claim 3, characterized in that: The liquid outlet chamber is Y-shaped, and the top of the liquid outlet chamber is located inside the dust collector and is connected to the interior of the dust collector.

7. The coating apparatus for fabricating stealth optical fibers based on Nylon 12 according to claim 1, characterized in that: There are four spray pipes in total, and all four spray pipes are arranged in a ring around the inner side of the coating box with the central axis of the coating box as the reference.

8. The coating apparatus for fabricating stealth optical fibers based on Nylon 12 according to claim 2, characterized in that: The laminating ring is designed with layers. The inner side of the laminating ring is connected to a movable plate through a cavity, and the outer side of the movable plate contacts the edge of the laminating ring. This is used to change the diameter of the laminating ring by moving it.

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