Fiber paste coating device applied to layer-stranded optical cable production

Abstract

The invention relates to the technical field of optical fiber production, and aims to solve the technical problems that an optical fiber filling device and a plastic extruding machine mold core are not concentric, operation is tedious, and time and labor are consumed. In order to solve the technical problem, the invention provides the fiber paste coating device applied to layer-stranded optical cable production. The device comprises a frame body; the moving assembly is connected to the frame body; the oil filling assembly comprises an oil filling bracket, and an inlet mold, a needle-tube-free oil filling cavity and an outlet mold which are coaxially connected in sequence; the oil filling support is located above the moving assembly, and the moving assembly drives the oil filling assembly to move on the frame body along the X axis and the Y axis and is used for finely adjusting the center position of the oil filling assembly. The X axis and the Y axis are in the radial direction of the needle-tube-free oil filling cavity and intersect with each other. The problem that the oil filling assembly and a mold core of a machine table are not concentric due to falling of the oil filling assembly is solved, the center positions of the inlet mold, the needle-tube-free oil filling cavity and the outlet mold are adjusted, the outlet mold and the mold core are coaxial, and time and labor are saved.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber production, and in particular to a fiber paste coating device used in the production of layer-stranded optical cables. Background Art

[0002] With the development of communication technology, the demand for optical fiber cables continues to increase. An important production link in the process of optical cable production is optical fiber sheathing. The key is to control the PBT sheathing molding and the excess length of the optical fiber inside the sheath through appropriate process methods. The excess length of the optical fiber inside the sheath requires the optical fiber to be filled with fiber paste. Traditional fiber paste filling devices are generally hoisted and suspended. A horizontally extending balance rail is installed on the head of the extruder, and the fiber paste filling device is fixed to the bottom of the other end of the balance rail. When the optical fiber passes through the filling device, the fiber paste adheres to the moving optical fiber, and then enters the head of the extruder to fill the inner cavity of the sheath.

[0003] However, the traditional hanging fiber paste filling device has the following problems: 1. Slight falling is prone to occur, which will cause the optical fiber filling device to be out of center with the extruder mold core. This will cause the optical fiber attached with fiber paste to stick to the inner wall of the casing after entering the casing, affecting the quality of the casing.

[0004] 2. In order to ensure that the optical fiber is coaxial with the sleeve in the extruder, it is necessary to stop the machine and disassemble the machine head for adjustment before production. The operation is cumbersome and time-consuming and labor-intensive. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a fiber paste coating device for producing layer-stranded optical cables, comprising: a frame; A mobile assembly connected to the frame; The oil filling component includes an oil filling bracket and an inlet mold, a needle-free oil filling cavity and an outlet mold which are coaxially connected in sequence; the oil filling bracket is located above the moving component, and the moving component drives the oil filling component to move along the X-axis and the Y-axis on the bracket to fine-tune the center position of the oil filling component; the X-axis and the Y-axis are respectively radial directions of the needle-free oil filling cavity and the two intersect.

[0007] In one embodiment of the present invention, the present application also includes a transverse moving component connected between the frame and the moving component, and the transverse moving component drives the oil filling component to move on the Z axis, and the Z axis is the axial direction of the needle-free oil filling cavity.

[0008] In one embodiment of the present invention, the lateral moving assembly includes a linear guide rail, a slider, a connecting fixture and a stop knob; the linear guide rail is connected to one side of the frame, the slider and the linear guide rail constitute a sliding pair, the connecting fixture is connected to the slider and the moving assembly, and the stop knob is threadedly connected to the connecting fixture and is against the frame.

[0009] In one embodiment of the present invention, baffles are provided at both ends of the linear guide rail to limit the position of the slider.

[0010] In one embodiment of the present invention, a fiber paste inlet is provided on the needle-free tube oil-filling cavity; and the position of the fiber paste inlet is adjustable along the circumference of the needle-free tube oil-filling cavity.

[0011] In one embodiment of the present invention, the oil-filling bracket includes a front end conduit, a first connecting part and a second connecting part which are connected in sequence; the front end conduit is coaxial with the outlet mold; the first connecting part is connected to the moving component; the second connecting part is an arc-shaped structure, and the front end of the second connecting part is provided with at least one U-shaped groove, and the U-shaped groove extends along the axis of the needle-free oil-filling cavity; the outer wall of the needle-free oil-filling cavity is provided with a plurality of threaded holes evenly distributed along its circumference; the threaded holes are connected to the U-shaped grooves.

[0012] In one embodiment of the present invention, the present application also includes an intermediate connecting member for connecting the moving component and the oil-filled bracket; a plurality of first connecting holes are provided on the intermediate connecting member; the plurality of first connecting holes are distributed in a circular array; a plurality of second connecting holes are provided on the oil-filled bracket; the plurality of second connecting holes are distributed in a circular array; the number of second connecting holes is half the number of first connecting holes; a second connecting hole is correspondingly connected to a first connecting hole.

[0013] In one embodiment of the present invention, the present application also includes an oil receiving tank detachably connected to the top of the frame, and the oil receiving tank is located directly below the oil filling assembly.

[0014] In one embodiment of the present invention, the oil receiving tank is connected to the frame by magnetic adsorption.

[0015] In one embodiment of the present invention, the inlet mold includes a connecting body and a needle tube portion connected to the rear end of the connecting body; a gap is formed between the rear end surface of the needle tube portion and the front end surface of the outlet mold.

[0016] The above technical solution of the present invention has the following advantages compared with the prior art: The fiber paste coating device used in the production of stranded optical cables described in the present invention connects the oil-filled component to the top of the frame by sliding through a movable component. The present application is supported by the frame, and its high support strength avoids the problem of the oil-filled component and the mold core of the machine being out of center due to the oil-filled component falling. In addition, the present application can drive the oil-filled component to move in a plane perpendicular to the optical fiber axis through the movable component, thereby adjusting the center position of the inlet mold, the needle-free oil-filled cavity and the outlet mold, and further making the outlet mold coaxial with the mold core, which is simple to operate and saves time and effort. In addition, the oil-filled component is arranged above the movable component, which is convenient for laying pipelines, replacing inlet and outlet molds, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein: Figure 1 It is a structural schematic diagram of a fiber paste coating device used in the production of layer-stranded optical cables in a preferred embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure of an oil-filled component in a fiber paste coating device for producing stranded optical cables; Figure 3 yes Figure 1 A schematic diagram of the structure of an oil-filled bracket used in a fiber paste coating device for producing stranded optical cables; Figure 4 yes Figure 1 The schematic diagram of the structure of the imported mold used in the fiber paste coating device for the production of stranded optical cables; Figure 5 yes Figure 1 A schematic diagram of the structure of a needle-free oil-filled cavity in a fiber paste coating device for producing stranded optical cables; Figure 6 yes Figure 1 A schematic diagram of the structure of an outlet die in a fiber paste coating device for producing stranded optical cables; Figure 7 yes Figure 1 A schematic diagram of the structure of an intermediate connector in a fiber paste coating device for producing stranded optical cables; Figure 8 yes Figure 1 The internal schematic diagram of the inlet mold, the needle-free oil-filled cavity and the outlet mold in the fiber paste coating device for the production of stranded optical cables; Description of the accompanying drawings: 100, frame; 200, mobile components; 300, oil filling assembly; 310, oil filling bracket; 311, front end guide tube; 312, first connecting part; 313, second connecting part; 314, U-shaped groove; 315, second connecting hole; 320, import mold; 321, connecting body; 322, needle tube; 323, trumpet hole; 324, through hole; 330, needle-free oil filling cavity; 331, fiber paste inlet; 332, threaded hole; 340, export mold; 400, lateral moving assembly; 410, linear guide rail; 411, baffle; 420, slider; 430, connecting fixture; 440, stop knob; 500, intermediate connecting member; 510, first connecting hole; 600. Oil tank. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0019] In some comparative embodiments, since the fiber paste filling device is suspended at one end of a balancing slide rail, during a long period of high-speed production, the fiber paste filling device may fall due to the gravity of the fiber paste filling device and the operation of the production personnel, thereby causing the fiber optic filling device to be out of center with the mold core of the extruder (machine).

[0020] To solve this problem, refer to Figure 1 to Figure 8 As shown, an embodiment of the present invention provides a fiber paste coating device for producing layer-stranded optical cables, comprising: The frame 100 is fixed on one side of the machine; The moving assembly 200 is connected to the frame 100. The moving assembly 200 may be a fine-tuning optical manual cross slide or a manual high-precision two-axis translation stage.

[0021] The oil filling assembly 300 includes an oil filling bracket 310 and an inlet mold 320, a needle-free oil filling cavity 330 and an outlet mold 340 which are coaxially connected in sequence. The oil filling bracket 310 is located above the moving assembly 200. The oil filling bracket 310 is slidably connected to the frame 100 through the moving assembly 200. The moving assembly 200 drives the oil filling assembly 300 to move along the X-axis and the Y-axis on the frame 100 to fine-tune the center position of the oil filling assembly 300. The X-axis and the Y-axis are respectively the radial directions of the needle-free oil filling cavity 330 and the two intersect (for example, vertically). The inlet mold 320 adopts a fiber bundle template, which is connected to the needle-free oil filling cavity 330 through annular holes spaced 120° apart. The two are tightly connected and have good sealing performance. The outer end of the outlet mold 340 adopts an easily detachable hexagonal design, which is convenient for mold replacement and removal. The outlet mold 340 is screwed into the needle-free oil-filling cavity 330 through a thread (for example, one end of the outlet mold 340 is provided with an external thread, and the needle-free oil-filling cavity 330 is provided with a threaded hole 332, and the external thread is threadedly connected to the threaded port), and a sealing gasket is added to ensure the sealing effect.

[0022] Specifically, the present application uses the mobile component 200 to slide the oil filling component 300 above the frame 100. The present application is supported by the frame 100, and its high support strength avoids the problem of the oil filling component 300 not being concentric with the mold core of the machine caused by the oil filling component 300 falling. In addition, the present application can drive the oil filling component 300 to move in a plane perpendicular to the optical fiber axis through the mobile component 200, thereby adjusting the center position of the inlet mold 320, the needle-free oil filling cavity 330 and the outlet mold 340, and further making the outlet mold 340 coaxial with the mold core, which is simple to operate and saves time and effort. In addition, the oil filling component 300 is arranged above the mobile component 200, which is convenient for threading pipelines, replacing the inlet and outlet molds 340, etc.

[0023] It can be seen that the present application solves the problem of the inconvenience of coaxial adjustment between the traditional fiber paste filling device and the machine, reduces the downtime due to equipment adjustment, and makes the production process smoother. The present application also avoids uneven fiber paste filling or optical fiber position deviation caused by the problem of the fiber paste filling device falling, thereby ensuring the adhesion quality of the fiber paste on the optical fiber and ensuring the good performance of the produced optical cable.

[0024] Furthermore, the present application also includes a transverse moving assembly 400 connected between the frame 100 and the moving assembly 200. The transverse moving assembly 400 drives the oil filling assembly 300 to move on the Z axis, and the Z axis is the axial direction of the needle-free oil filling cavity 330. The Z axis, the X axis and the Y axis intersect, for example, the Z axis, the X axis and the Y axis establish a three-dimensional rectangular coordinate system. Specifically, the present embodiment also provides a transverse moving assembly 400, so that the oil filling assembly 300 moves on the axis of the needle-free oil filling cavity 330, so that the distance between the oil filling assembly 300 and the extruder head can be adjusted, so that the oil filling bracket 310 is detached from the machine, which is convenient for the maintenance and cleaning of the extruder.

[0025] Furthermore, the lateral moving assembly 400 includes a linear guide rail 410, a slider 420, a connecting fixture 430 and a stop knob 440. The linear guide rail 410 is connected to one side of the frame 100, the slider 420 and the linear guide rail 410 form a sliding pair, the connecting fixture 430 is connected to the slider 420 and the moving assembly 200, the stop knob 440 is threadedly connected to the connecting fixture 430, and the stop knob 440 is set against the frame 100. In some embodiments, the connecting fixture 430 is an L-shaped structure, and a portion of the connecting fixture 430 is provided with a 8*φ5.5mm countersunk hole, the outer diameter of the countersunk is 10mm, and the depth is 6mm. The countersunk hole is connected to the slider 420 using an M6 screw; in addition, the connecting fixture 430 has an M8-6H threaded hole 332, which is used in conjunction with an M8 plum screw as the stop knob 440. The other part of the connecting and fixing plate has 4*M4-6H threaded holes 332 , and the threaded holes 332 are used for threaded connection with the moving assembly 200 .

[0026] Furthermore, baffles 411 are provided at both ends of the linear guide rail 410 to limit the slider 420 and prevent the slider 420 from detaching from the linear guide rail 410 .

[0027] Furthermore, the needle-free oil filling cavity 330 is provided with a fiber paste inlet 331 penetrating through its wall; along the circumference of the needle-free oil filling cavity 330, the position of the fiber paste inlet 331 is adjustable. In some possible embodiments, the oil filling bracket 310 includes a front end conduit 311, a first connecting portion 312, and a second connecting portion 313 connected in sequence; the front end conduit 311 is coaxial with the outlet mold 340; the first connecting portion 312 is connected to the moving assembly 200; the second connecting portion 313 is an arc-shaped structure and is coaxial with the needle-free oil filling cavity 330, and the front end of the second connecting portion 313 is provided with at least one U-shaped groove 314, and the U-shaped groove 314 extends on the axis of the needle-free oil filling cavity 330; the outer wall of the needle-free oil filling cavity 330 is provided with a plurality of threaded holes 332 evenly distributed along its circumference; the threaded holes 332 are connected to the U-shaped groove 314 by screws. The material of the oil filling bracket 310 is 40Cr. Specifically, the fiber paste inlet 331 needs to be docked with the fiber paste oil filling tube on the machine to provide fiber paste. Since the positions of the fiber paste oil filling tubes of different machines are different (some are at the top, some are on the side, and some are at the bottom). In order to avoid the bending of the fiber paste oil filling tube, the present application realizes the orientation adjustment of the fiber paste inlet 331 by connecting the threaded holes 332 of different hole positions with the U-shaped groove 314, so that it can adapt to the fiber paste oil filling tubes of different orientations as much as possible, further avoid the bending of the fiber paste oil filling tube, and make the fiber paste filling smoother. In some embodiments, the length of the U-shaped groove 314 is 53.5mm, the width is 20mm, and the diameter of the inscribed arc is 9mm.

[0028] The present application can provide a needle-free oil-filled cavity 330 that can move laterally within a range of 1150 mm.

[0029] Further, the position of the second connection portion 313 in the circumferential direction is adjustable. In some embodiments, the present application also includes an intermediate connection member 500 for connecting the moving assembly 200 and the oil-filled bracket 310; the intermediate connection member 500 is provided with a plurality of first connection holes 510; the plurality of first connection holes 510 are distributed in a circular array; the oil-filled bracket 310 is provided with a plurality of second connection holes 315; the plurality of second connection holes 315 are distributed in a circular array; the number of second connection holes 315 is half the number of first connection holes 510; a second connection hole 315 is connected to a first connection hole 510 in correspondence. In some embodiments, there are 8 first connection holes 510, and the 8 first connection holes 510 are distributed in a ring at 45° intervals, for example, the aperture of the first connection hole 510 is φ5.5mm. There are 4 second connection holes 315, and the 4 second connection holes 315 are distributed in a ring at 90° intervals, for example, the second connection hole 315 is an M5 threaded hole 332. In this way, each time the four first connecting holes 510 are connected to the four second connecting holes 315 on the oil filling bracket 310, a 90° direction adjustment can be achieved according to the different connection hole positions each time, thereby changing the direction of the fiber paste inlet 331 in the needle-free oil filling cavity 330. The intermediate connecting member 500 is sickle-shaped. A part of the intermediate connecting member 500 is connected to the moving component 200 by multiple (for example, 8) M4 screws. Specifically, some venues have even-numbered machines, and some venues have odd-numbered machines (that is, one machine is equipped with one application). The aisle of the even-numbered machines is located between the two machines (that is, one of the devices is located on the front side of one machine, and the other device is located on the back side of the other machine). Since the lateral moving component 400 needs to be adjusted, the operator faces the lateral moving component 400 to operate, that is, the side with the lateral moving component 400 is set toward the operator. In order to facilitate the installation of the optical fiber in the oil-filled assembly 300, the second connecting portion 313 should face away from the operator (i.e., the hollowed-out portion should face the operator). Therefore, the present application connects the first connecting hole 510 with the second connecting hole 315 at different positions to achieve the position adjustment of the second connecting portion 313 in the circumferential direction.

[0030] The inlet mold 320 is connected to the needle-free tube oil-filling cavity 330 by bolts, and the outlet mold 340 is connected to the needle-free tube oil-filling cavity 330 by screws.

[0031] During the production process, fiber paste often spills on the ground. This will lead to a dirty and messy working environment, and also increase the cost of cleaning and other maintenance. In order to solve this problem, the present application further includes an oil receiving tank 600 that is detachably connected to the top of the frame 100, and the oil receiving tank 600 is located directly below the oil filling component 300. Specifically, the present embodiment sets an oil receiving tank 600 directly below the oil filling component 300, and provides a fiber paste spill recovery structure, so that the oil receiving tank 600 can catch the spilled fiber paste, keep the environment clean, and reduce maintenance costs.

[0032] Furthermore, the oil receiving tank 600 is connected to the frame 100 by magnetic adsorption. In some embodiments, the oil receiving tank 600 and the frame 100 are respectively made of metal materials that can be attracted by magnets, and a magnetic body is connected to the oil receiving tank 600 or the frame 100. In this way, the oil receiving tank 600 and the frame 100 can be quickly installed and disassembled, which is convenient for quickly handling the fiber paste in the oil receiving tank 600.

[0033] Furthermore, the inlet mold 320 includes a connecting body 321 and a needle tube part 322 connected to the rear end of the connecting body 321; the rear end face of the needle tube part 322 and the front end face of the outlet mold 340 have a gap, and the gap is 7~10mm. In this way, after the inlet mold 320 and the outlet mold 340 are matched with the needle-free oil filling cavity 330, the size design of the rear end face of the needle tube part 322 and the front end face of the outlet mold 340 reserves space to ensure good passability and stability during the fiber paste filling process. The size of the gap will affect the radial space remaining after the needle tube part 322 is matched with the needle-free oil filling cavity 330. A reasonable gap can provide better passability during the fiber paste filling process and improve the pressure on the needle tube part 322. The needle tube part 322 adopts a short pointed mouth structure with a compact structure and strong overall rigidity. It can better withstand the pressure and impact during the oil filling process, reduce the vibration amplitude during the oil filling process, reduce stress concentration, and thus reduce the attenuation loss of the optical fiber due to stress.

[0034] In some embodiments, a horn hole 323 is provided on the connecting body 321, and the needle tube portion 322 is provided with a through hole 324 coaxial with the horn hole 323. The diameter of the through hole 324 is more than 3 times the diameter of the tail end of the horn hole 323. Specifically, the present application directly transitions from the horn hole 323 to the through hole 324 with a larger diameter. The horn hole 323 facilitates the insertion of the optical fiber, and the large-diameter through hole 324 allows the inserted optical fiber to have a smoother transition and less stress on the optical fiber.

[0035] The fiber paste will flow from the external fiber paste oil-filling tube into the needle-free oil-filling cavity 330. When a single or bundled optical fiber enters from the inlet mold 320 and then passes through the needle-free oil-filling cavity 330, the fiber paste will adhere to the optical fiber and then leave from the outlet mold 340, and finally enter the sleeve of the machine through the front end guide tube 311 of the oil-filling bracket 310.

[0036] The present application can adjust the concentricity of the machine head mold core and the optical fiber with high precision and good filling quality. The concentricity adjustment does not require disassembly of the machine head, which is more convenient, improves production efficiency, and reduces manual labor intensity. The oil collecting groove 600 of the present application has the function of collecting and recycling the fiber paste spilled during production, and concentrates the collection directly below to avoid polluting the production environment due to spilled fiber paste.

[0037] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A fiber paste coating device for producing stranded optical cables, characterized in that: include: Frame; A mobile assembly connected to the frame; The oil filling component includes an oil filling bracket and an inlet mold, a needle-free oil filling cavity and an outlet mold which are coaxially connected in sequence; the oil filling bracket is located above the moving component, and the moving component drives the oil filling component to move along the X-axis and the Y-axis on the bracket to fine-tune the center position of the oil filling component; the X-axis and the Y-axis are respectively radial directions of the needle-free oil filling cavity and intersect with each other.

2. The fiber paste coating device for stranded optical cable production according to claim 1 is characterized in that: It also includes a transverse moving component connected between the frame and the moving component, and the transverse moving component drives the oil filling component to move on the Z axis, and the Z axis is the axial direction of the needle-free tube oil filling cavity.

3. The fiber paste coating device for stranded optical cable production according to claim 2 is characterized in that: The lateral moving assembly includes a linear guide rail, a slider, a connecting fixture and a stop knob; the linear guide rail is connected to one side of the frame, the slider and the linear guide rail form a sliding pair, the connecting fixture is connected to the slider and the moving assembly, the stop knob is threadedly connected to the connecting fixture, and the stop knob is threadedly abutted against the frame.

4. The fiber paste coating device for stranded optical cable production according to claim 3 is characterized in that: Baffles are provided at both ends of the linear guide rail to limit the position of the slide block.

5. The fiber paste coating device for stranded optical cable production according to claim 1 is characterized in that: The needle-free oil-filling cavity is provided with a fiber paste inlet; along the circumference of the needle-free oil-filling cavity, the position of the fiber paste inlet is adjustable.

6. The fiber paste coating device for stranded optical cable production according to claim 5 is characterized in that: The oil-filling bracket includes a front end conduit, a first connecting part and a second connecting part which are connected in sequence; the front end conduit is coaxial with the outlet mold; the first connecting part is connected to the moving component; the second connecting part is an arc-shaped structure, and the front end of the second connecting part is provided with at least one U-shaped groove, and the U-shaped groove extends along the axis of the needle-free oil-filling cavity; the outer wall of the needle-free oil-filling cavity is provided with a plurality of threaded holes evenly distributed along its circumference; the threaded holes are connected to the U-shaped grooves.

7. The fiber paste coating device for stranded optical cable production according to claim 6 is characterized in that: The circumferential position of the second connecting portion is adjustable.

8. The fiber paste coating device for stranded optical cable production according to claim 1 is characterized in that: It also includes an oil receiving tank detachably connected to the top of the frame, and the oil receiving tank is located directly below the oil filling assembly.

9. The fiber paste coating device for producing layer-stranded optical cables according to claim 8, characterized in that: The oil receiving tank is connected to the frame body by magnetic adsorption.

10. The fiber paste coating device for stranded optical cable production according to claim 1, characterized in that: The inlet mold comprises a connecting body and a needle tube part connected to the rear end of the connecting body; a gap is formed between the rear end surface of the needle tube part and the front end surface of the outlet mold.

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