Production equipment and production method of optical fiber ribbon

Abstract

The application discloses a production equipment and a production method of a winding optical fiber ribbon, and relates to the field of optical fiber ribbon production.The technical scheme is as follows: the production equipment comprises a rack, a take-up device, a dispensing device and two ribbon combining devices;the ribbon combining device comprises a ribbon combining roller and a ribbon pressing roller, and the ribbon combining roller is provided with a ribbon combining groove for arranging multiple optical fibers into an optical fiber ribbon;the dispensing device is arranged below the optical fiber ribbon between the two ribbon combining devices, and comprises multiple dispensing needles and a lifting assembly;the dispensing needle is internally provided with a liquid outlet hole and is provided with a tapered needle tip at the end;when the dispensing needle is lifted, the tapered needle tip is inserted into the gap between adjacent optical fibers and expands the gap;resin flows out of the liquid outlet hole and forms a liquid bead at the tapered needle tip;when the dispensing needle is lowered, the liquid bead penetrates into the gap between the adjacent optical fibers, which is reduced, so that multiple spaced adhesive nodes are formed on the optical fiber ribbon.The application effectively improves the adhesive strength, structural consistency and yield of the optical fiber ribbon.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical fiber ribbon production, more particularly, it relates to a production equipment and method of a coiled optical fiber ribbon. BACKGROUND

[0002] In recent years, the demand for large-core and super-large-core optical cables is increasing, and the application environment is becoming more and more complex and diverse, so the application of optical fiber ribbon optical cables is increasing. In order to realize high-density large-core optical cables, coiled optical fiber ribbon (mesh optical fiber ribbon) emerges as the times require. Compared with conventional optical fiber ribbon, the coiled optical fiber ribbon has good flexibility, can be coiled for use without affecting the optical performance of the optical fiber, and can realize the development of high-density optical cables under the same volume.

[0003] The coiled optical fiber ribbon is usually arranged by parallel laying multiple optical fibers by using a ribbon process, then coated with resin, and finally cured. The optical fibers of the coiled optical fiber ribbon are only partially bonded between the optical fibers, and the bonded part and the unbonded part exist alternately, which gives the optical fibers a lot of free space to change shape at will. In the subsequent cabling process, it can be coiled into various shapes, which can effectively increase the fiber density of the optical cable under the same volume, and is beneficial to the realization of high-density large-core optical cables under the same outer diameter.

[0004] A resin coating device for optical fiber ribbon is disclosed in Chinese Patent No. CN120662497A. The technical solution points are: including: a three-dimensional driving device, a dispensing device, a mold base, a visual positioning device, a flow regulating device, and a controller. The visual positioning device collects the position information of the optical fiber ribbon in the mold base. The controller controls the three-dimensional driving device to drive the dispensing device to move according to the position information, and controls the flow regulating device to regulate the glue discharge flow of the dispensing device, so that the resin can be applied to the surface of the optical fiber ribbon.

[0005] In the above-mentioned device, the dispensing device is located above the mold base. During the movement of the dispensing device in the three-dimensional space, residual glue may drop and contaminate the non-predefined bonding area of the optical fiber ribbon. In addition, when ribbonizing in the mold base, if the adjacent optical fibers are kept in close contact, the resin is difficult to penetrate into the contact interface between the adjacent optical fibers, resulting in insufficient bonding strength. If the adjacent optical fibers are intentionally kept at a certain distance, the resin is prone to sink or even drop, which not only causes waste of resin, but also affects the stability of the ribbon process.

[0006] Therefore, a new scheme is needed to solve this problem. SUMMARY

[0007] Therefore, the purpose of the present application is to provide a production equipment and method of a coiled optical fiber ribbon, which effectively improves the bonding strength, structural consistency and yield of the optical fiber ribbon.

[0008] To achieve the above object, the technical scheme adopted by the present application is as follows: a production equipment of optical fiber ribbon capable of being wound, comprising a rack, a pay-off device and a take-up device arranged on the rack, and further comprising a dispensing device and two ribbon combining devices arranged on the rack;

[0009] The two ribbon combining devices are arranged at intervals between the pay-off device and the take-up device, each of the ribbon combining devices comprises a support and a ribbon combining roller and a ribbon pressing roller arranged on the support, the ribbon combining roller is provided with a ribbon combining groove for arranging a plurality of optical fibers into an optical fiber ribbon, and the ribbon pressing roller is used for pressing the optical fiber ribbon in the ribbon combining groove;

[0010] The dispensing device is arranged below the optical fiber ribbon between the two ribbon combining devices, the dispensing device comprises a plurality of dispensing needles and a lifting assembly for driving the plurality of dispensing needles to lift, the inside of the dispensing needle is provided with a liquid outlet hole, and the end portion is provided with a tapered needle tip;

[0011] During the lifting of the dispensing needle, the tapered needle tip can be inserted into and expand the gap between adjacent optical fibers, the resin flows out of the liquid outlet hole and forms a liquid bead at the tapered needle tip, during the lowering of the dispensing needle, the liquid bead is separated from the tapered needle tip and penetrates into the gap between the adjacent optical fibers with reduced resilience, so as to form a bonding node on the optical fiber ribbon.

[0012] Preferably, the lifting assembly comprises a connecting plate, a bottom plate mounted on the rack, a lifting plate slidably connected with the bottom plate through a lifting shaft, the connecting plate is fixedly connected to one end of the lifting shaft away from the lifting plate, a servo cylinder is connected between the connecting plate and the bottom plate, a transverse moving platform capable of being adjusted in position along the width of the optical fiber ribbon is arranged on the lifting plate, a needle plate is connected with a pressure sensor on the transverse moving platform, a plurality of dispensing needles are mounted on the needle plate according to the positions of the preset bonding nodes, and the dispensing device further comprises a dispensing valve in communication with the dispensing needles.

[0013] Preferably, the ribbon combining roller is provided with a circumferential groove in the circumferential direction, two buffer assemblies are arranged on both sides of the ribbon combining roller in the circumferential groove, and the inner side walls of the two buffer assemblies and the groove bottom of the circumferential groove jointly enclose the ribbon combining groove, and the two buffer assemblies are used for applying transverse elastic constraint to the optical fiber ribbon in the ribbon combining groove.

[0014] Preferably, each of the buffer assemblies comprises a buffer ring, a guide shaft and a spring, the buffer ring is slidably connected with the ribbon combining roller in the circumferential groove in the axial direction, and the outer diameter of the buffer ring is smaller than the diameter of the groove top of the circumferential groove;

[0015] The parallel-belt roller is provided with a stepped groove extending along the sliding direction of the buffer ring, and the stepped groove comprises a small-diameter groove and a large-diameter groove arranged in sequence from the side close to the circumferential groove to the end of the parallel-belt roller.

[0016] The buffer ring is slidably connected with the stepped groove through the guide shaft, one end of the guide shaft is fixed with the buffer ring, and the other end penetrates through the small-diameter groove and extends into the large-diameter groove.

[0017] In the large-diameter groove, the end of the guide shaft is connected with a limiting nut, the end of the large-diameter groove away from the limiting nut is threadedly connected with a jack screw, and the spring is arranged in the large-diameter groove between the limiting nut and the jack screw.

[0018] Preferably, the take-up device comprises a servo deceleration motor fixed on the rack, a take-up shaft fixed on the output end of the servo deceleration motor, and a take-up disc sleeved on the take-up shaft.

[0019] Preferably, the rack is further provided with a first tensioning assembly and a second tensioning assembly, the first tensioning assembly and the second tensioning assembly are respectively arranged on the opposite sides of the two parallel-belt devices, and the first tensioning assembly is located on the side close to the pay-off device, the first tensioning assembly comprises a tensioning frame fixed on the rack, and a pressure roller and two supporting rollers arranged on the tensioning frame, the two supporting rollers are arranged in parallel and used for supporting the lower surface of the plurality of optical fibers, and the pressure roller is located between the two supporting rollers and used for pressing the upper surface of the plurality of optical fibers.

[0020] Preferably, the parallel-belt forming die and the curing device are further arranged on the rack, and the parallel-belt forming die and the curing device are located between the second tensioning assembly and the take-up device and are arranged in sequence along the moving direction of the optical fiber ribbon.

[0021] The parallel-belt forming die comprises a shaping channel through which the optical fiber ribbon passes, and the cross-sectional shape of the shaping channel is adapted to the optical fiber ribbon to define the width and thickness of the optical fiber ribbon.

[0022] The curing device comprises a curing box, the curing box is provided with an inlet and an outlet through which the optical fiber ribbon passes, and a UV irradiation unit is arranged above and below the optical fiber ribbon in the curing box.

[0023] Preferably, the visual detection device is further arranged above the optical fiber ribbon between the two parallel-belt devices, used for identifying the gap position between adjacent optical fibers on the optical fiber ribbon and generating a position signal, and the transverse moving platform adjusts the transverse position according to the position signal, so that the conical needle tip of the dispensing needle is aligned with the gap between the adjacent optical fibers.

[0024] Preferably, a wire distribution device is arranged on the frame, located between the first tensioning assembly and the wire paying-out device, the wire distribution device comprising a wire distribution frame fixed on the frame, a wire distribution roller and a wire pressing roller arranged on the wire distribution frame, the wire distribution roller being provided with a plurality of wire distribution grooves for arranging a plurality of optical fibers, and the wire pressing roller being used for pressing the optical fibers in the wire distribution grooves.

[0025] A production method of the coiled optical fiber ribbon using any of the production apparatuses of the coiled optical fiber ribbon, comprising the following steps:

[0026] S1, unwinding a plurality of optical fibers through the wire paying-out device;

[0027] S2, guiding the plurality of optical fibers between the two ribbon combining devices to arrange the optical fibers into an optical fiber ribbon, and moving the optical fiber ribbon intermittently by the wire taking-up device while keeping a constant tension between the two ribbon combining devices, and advancing the optical fiber ribbon by a preset area segment each time;

[0028] S3, during the movement of the optical fiber ribbon, controlling the plurality of dispensing needles to ascend, the tapered needle tip inserting into and expanding the gap between the adjacent optical fibers, the resin flowing out of the liquid outlet hole and forming a liquid bead at the tapered needle tip, and then controlling the plurality of dispensing needles to descend, the liquid bead separating from the tapered needle tip and penetrating into the gap between the adjacent optical fibers with reduced resilience, thereby forming a plurality of spaced adhesive nodes in the current preset area segment;

[0029] S4, curing the adhesive nodes formed on the optical fiber ribbon after step S3.

[0030] Compared with the prior art, the production apparatus of the coiled optical fiber ribbon has the following advantages: by arranging the dispensing device below the optical fiber ribbon and adopting a top-up dispensing path from bottom to top, the problem of contaminating the surface of the optical fiber ribbon caused by the gravity dropping of residual glue in the conventional way is solved, and the cleanliness and resin coating accuracy of the optical fiber ribbon are effectively improved; meanwhile, when the dispensing needle ascends, the tapered needle tip can insert into and expand the gap between the adjacent optical fibers, the resin flows out of the liquid outlet hole and forms a liquid bead at the tapered needle tip, and when the dispensing needle descends, the liquid bead separates from the tapered needle tip and penetrates into the gap between the adjacent optical fibers with reduced resilience, thereby forming a plurality of spaced adhesive nodes with accurate position and internal filling on the optical fiber ribbon, which not only effectively solves the problem of weak adhesion caused by the surface adhesion of the resin in the conventional process, but also reduces the glue leakage and lack caused by improper reserved gap between the adjacent optical fibers, and effectively improves the adhesion strength, structural consistency and yield of the optical fiber ribbon. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only aim to explain some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0032] Figure 1 A structural schematic diagram of a production equipment of a coiled optical fiber ribbon according to an embodiment of the present application;

[0033] Figure 2 A structural schematic diagram of a line splitting device, a pre-ribboning device, a first tensioning assembly, a visual inspection device, a second tensioning assembly and a ribboning forming die according to an embodiment of the present application;

[0034] Figure 3 A structural schematic diagram of a lifting assembly according to an embodiment of the present application;

[0035] Figure 4 A structural schematic diagram of a dispensing needle according to an embodiment of the present application;

[0036] Figure 5 A schematic diagram of a liquid bead of resin formed when the dispensing needle rises according to an embodiment of the present application;

[0037] Figure 6 A schematic diagram of resin coated in a gap between adjacent optical fibers when the dispensing needle descends according to an embodiment of the present application;

[0038] Figure 7 A structural schematic diagram of a ribboning roller according to an embodiment of the present application;

[0039] Figure 8 A sectional view of a ribboning roller according to an embodiment of the present application;

[0040] Figure 9 A distribution schematic diagram of bonding nodes in a preset area segment of an optical fiber ribbon according to an embodiment of the present application.

[0041] Names of corresponding components represented by numbers or letters in the drawings:

[0042] 1, rack; 2, pay-off device; 3, take-up device; 31, servo deceleration motor; 32, take-up reel; 4, dispensing device; 41, lifting assembly; 411, lifting plate; 412, bottom plate; 413, lifting shaft; 414, connecting plate; 415, servo cylinder; 42, dispensing needle; 421, conical needle tip; 422, liquid outlet hole; 43, transverse movement platform; 44, needle plate; 45, pressure sensor; 5, banding device; 51, banding roller; 511, banding groove; 512, buffer ring; 513, guide shaft; 514, jackscrew; 515, spring; 516, limit nut; 52, pressure roller; 53, support; 6, line separating device; 61, line separating frame; 62, line pressing roller; 63, line separating roller; 631, line separating groove; 7, pre-banding device; 8, first tensioning assembly; 81, tensioning frame; 82, supporting roller; 83, pressure roller; 9, visual inspection device; 10, second tensioning assembly; 11, banding forming die; 12, curing device; 13, bonding node. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be described clearly and completely in the following detailed description. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 9 , the embodiments of the present application provide a production equipment of optical fiber ribbon that can be wound, comprising a rack 1, a pay-off device 2, a take-up device 3, a dispensing device 4 and two banding devices 5 arranged on the rack 1. The two banding devices 5 are arranged at intervals between the pay-off device 2 and the take-up device 3, and each banding device 5 comprises a support 53 and a banding roller 51 and a pressure roller 52 arranged on the support 53. Specifically, the banding roller 51 and the pressure roller 52 are rotatably connected with the support 53. The banding roller 51 is provided with a banding groove 511 for arranging a plurality of optical fibers into an optical fiber ribbon, and the pressure roller 52 is used to press and hold the optical fiber ribbon in the banding groove 511.

[0045] The dispensing device 4 is arranged below the fiber ribbon between the two ribbon bonding devices 5, and comprises a plurality of dispensing needles 42 and a lifting assembly 41 for driving the plurality of dispensing needles 42 to lift. The dispensing needle 42 is internally provided with a liquid outlet hole 422 and externally provided with a tapered needle tip 421 for coating resin. In order to prevent the tapered needle tip 421 from damaging the optical fiber, the tip of the tapered needle tip 421 is passivated. The dispensing device 4 further comprises a dispensing valve, preferably a screw valve, which can achieve precise glue breaking effect through slight reverse rotation of the screw. The dispensing valve is in communication with the dispensing needle 42 through the glue outlet, and is in communication with the external glue supply device through the glue inlet. It should be noted that one dispensing valve can be provided for each dispensing needle 42, or all dispensing needles 42 can be connected to one general dispensing valve through a hose, and of course a peristaltic pump can also be used to replace the dispensing valve.

[0046] The take-up device 3 comprises a servo-reduction motor 31 fixed on the rack 1, a take-up shaft fixed on the output end of the servo-reduction motor 31, and a take-up disc 32 sleeved and fixed on the take-up shaft. The pay-off device 2 comprises a pay-off shaft fixed on the rack 1 and a pay-off disc rotatably connected to the pay-off shaft.

[0047] The PLC controller is further included, and the servo-reduction motor 31 and the dispensing valve are electrically connected to the PLC controller, and the take-up disc 32 on the take-up shaft is controlled by the PLC controller to rotate periodically and intermittently, that is, to rotate a set angle in each movement cycle, and then to stop and keep locked at the target position.

[0048] During operation, the pay-off device 2 is used to unwind the plurality of optical fibers, the take-up device 3 is used to pull the fiber ribbon to move intermittently and keep the fiber ribbon between the two ribbon bonding devices 5 at a constant tension, and the take-up device 3 is also used to wind the fiber ribbon that has been processed. During the movement of the fiber ribbon, the dispensing needle 42 rises, as shown in Figure 5 , the tapered needle tip 421 inserts into and expands the gap between the adjacent optical fibers, the resin flows out of the liquid outlet hole 422 and forms a liquid bead at the tapered needle tip 421. When the dispensing needle 42 descends and exits the gap between the adjacent optical fibers, as shown in Figure 6 , the gap between the adjacent optical fibers rebounds and decreases to the initial state, the liquid bead is separated from the tapered needle tip 421 under the action of the gap rebound, and penetrates into the gap between the adjacent optical fibers under the action of gravity, thereby forming a plurality of spaced adhesive nodes 13 on the preset region of the fiber ribbon.

[0049] It should be noted that in the process of the descending withdrawal of the dispensing needle 42, the rebound closure of the gap between the adjacent optical fibers will form an effective scraping on the conical needle tip 421, so that the resin that may be attached on the conical needle tip 421 is scraped off and remains on the contact interface between the adjacent optical fibers, which can enhance the bonding strength between the adjacent optical fibers, and on the other hand, the top and surface of the conical needle tip 421 are not prone to the situation of residual glue, thereby ensuring that the resin is fully utilized and the fullness of the bonding node 13 is ensured. In addition, in addition to the screw valve described above, a back suction valve can also be selected for the dispensing valve. When the conical needle tip 421 completely exits the gap between the adjacent optical fibers, the dispensing valve performs a back suction action to retract the residual resin that may appear on the top of the conical needle tip 421 inward by a distance, thereby avoiding the problem that the residual resin on the top of the conical needle tip 421 is not completely separated from the bonding node 13.

[0050] In the above arrangement, not only the problem of poor bonding caused by the surface attachment of resin in the traditional process is effectively solved, but also the situations of glue leakage and lack of glue caused by improper reserved gap between adjacent optical fibers are reduced, and the bonding strength, structural consistency and yield of the optical fiber ribbon are effectively improved.

[0051] Please refer to Figure 3 In the embodiment, the lifting assembly 41 includes a connecting plate 414, a bottom plate 412 mounted on the rack 1, a lifting plate 411 slidably connected with the bottom plate 412 through a lifting shaft 413, the connecting plate 414 is fixedly connected to one end of the lifting shaft 413 away from the lifting plate 411, a servo cylinder 415 is connected between the connecting plate 414 and the bottom plate 412, and a displacement groove is arranged on the table top of the rack 1 to accommodate the servo cylinder 415 and the lifting shaft 413. A transverse moving platform 43 capable of adjusting the position in the width direction of the optical fiber ribbon is arranged on the lifting plate 411, and the transverse moving platform 43 includes a servo linear motor fixed on the lifting plate 411 and a moving plate fixed on the output end of the servo linear motor. A slide rail pair for guiding is further arranged between the moving plate and the lifting plate 411. The moving plate of the transverse moving platform 43 is connected with a needle plate 44 through a pressure sensor 45, and the pressure sensor 45 is arranged in four positions distributed at the four corners of the moving plate. The pressure sensor 45 not only identifies the pressure, but also provides stable support force for the needle plate 44. In order to further improve the stability of the needle plate 44, a plurality of guide shafts can be fixed on the moving plate in the longitudinal direction, and the needle plate 44 is respectively provided with a guide groove slidably matched with each guide shaft. A plurality of dispensing needles 42 are arranged on the needle plate 44 according to the positions of the preset bonding nodes 13. The servo cylinder 415, the pressure sensor 45, the servo linear motor and the PLC controller are electrically connected respectively.

[0052] In the above arrangement, the lateral moving platform 43 can adjust the lateral position of the needle plate 44 so that the dispensing needles 42 are aligned with the gaps between the adjacent optical fibers. It should be noted that, under the constant tension and the constraint of the belt groove 511, the adjacent optical fibers are relatively close to each other, so that the tight gaps between the adjacent optical fibers are uniformly distributed. By adjusting the position of the needle plate 44 through the lateral moving platform 43, it is only necessary to align a single dispensing needle 42 with a corresponding gap to ensure that all dispensing needles 42 are accurately aligned with the corresponding gaps. By providing the pressure sensor 45, if the conical needle tip 421 does not insert into the gap but touches the surface of the optical fiber due to the deviation of the alignment during the lifting of the dispensing needle 42, the pressure sensor 45 will immediately detect the sharply increased force signal, and the lifting action can be immediately stopped to avoid serious damage to the optical fiber by the conical needle tip 421. It can be understood that, since the optical fiber includes a core and an outer skin wrapped outside, slight wear of the outer skin by the conical needle tip 421 usually does not affect the performance, but can enhance the bonding performance of the resin at the slightly worn part.

[0053] Referring to Figure 1 and Figure 3 In the embodiment, the visual detection device 9 is also included, which is specifically a CCD camera. The visual detection device 9 is electrically connected with the PLC controller. The visual detection device 9 is located above the optical fiber ribbon between the two belt devices 5, and is used to identify the gap position between the adjacent optical fibers on the optical fiber ribbon and generate a position signal. The PLC controller controls the lateral moving platform 43 to move along the width direction of the optical fiber ribbon according to the position signal, so that the conical needle tip 421 of the dispensing needle 42 is aligned with the gap between the adjacent optical fibers.

[0054] Referring to Figure 7 and Figure 8 In the embodiment, the circumferential direction of the belt roller 51 is provided with a circumferential groove. Two sides of the belt roller 51 located in the circumferential groove are respectively provided with a buffer assembly. The inner side wall of the two buffer assemblies and the groove bottom of the circumferential groove enclose the above-mentioned belt groove 511. The two buffer assemblies are used to apply lateral elastic constraint to the optical fiber ribbon in the belt groove 511.

[0055] Specifically, each buffer assembly includes a buffer ring 512, a guide shaft 513 and a spring 515, the buffer ring 512 is in sliding connection with the belt-up roller 51 in the circumferential groove in the axial direction, and the outer diameter of the buffer ring 512 is slightly smaller than the diameter of the top of the circumferential groove, so that the buffer ring 512 will not be resisted by the belt-up roller 52 when it slides in the axial direction. The belt-up roller 51 is provided with a stepped groove, which extends in the sliding direction of the buffer ring 512, and the stepped groove includes a small-diameter groove and a large-diameter groove arranged in sequence from the side close to the circumferential groove to the end of the belt-up roller 51. The buffer ring 512 is in sliding connection with the stepped groove through the guide shaft 513, one end of the guide shaft 513 is fixed with the buffer ring 512, and the other end penetrates through the small-diameter groove and extends into the large-diameter groove. In the large-diameter groove, the end of the guide shaft 513 is connected with a limiting nut 516, and the end of the large-diameter groove away from the limiting nut 516 is threadedly connected with a jack screw 514, and the spring 515 is arranged in the large-diameter groove between the limiting nut 516 and the jack screw 514.

[0056] In the above arrangement, by screwing the jack screw 514, the spring 515 in the large-diameter groove can be pre-compressed, so that the buffer ring 512 provides an initial pre-tightening force for the fiber ribbon, and under this initial pre-tightening force, the normal belt-up state can be maintained. When the tapered needle tip 421 extends into the gap between the adjacent optical fibers of the fiber ribbon, if the elastic deformation of the optical fibers themselves cannot provide enough space for opening, the fiber ribbon will be widened as a whole due to the radial opening force of the tapered needle tip 421, thereby extruding the buffer rings 512 on both sides outward, and the buffer rings 512 are compressed to compress the spring 515 through the guide shaft 513 after being pressed, thereby ensuring that the gap between the adjacent optical fibers is reliably opened to the required size.

[0057] In another embodiment, generally, the elastic deformation of the optical fibers themselves can meet the requirements of the tapered needle tip for opening or reducing the gap between the adjacent optical fibers, so the above circumferential groove can be directly used as the belt-up groove 511, and the difference is that the length of the circumferential groove in the axial direction in this embodiment is adapted to the nominal width of the fiber ribbon to form a direct rigid constraint on the fiber ribbon.

[0058] See Figure 1 and Figure 2In the embodiment, the rack 1 is further provided with a first tensioning assembly 8 and a second tensioning assembly 10, the first tensioning assembly 8 and the second tensioning assembly 10 are respectively arranged at two opposite sides of the two tape laying devices 5, and the first tensioning assembly 8 is located at a side close to the paying-out device 2. The first tensioning assembly 8 comprises a tensioning frame 81 fixed on the rack 1, and a compression roller 83 and two supporting rollers 82 rotatably connected to the tensioning frame 81. The two supporting rollers 82 are arranged in parallel and used to support the lower surface of the plurality of optical fibers, and the compression roller 83 is located between the two supporting rollers 82 and used to press the upper surface of the plurality of optical fibers. The compression roller 83 can be arranged in parallel with the two supporting rollers 82 to form a stable clamping area, and the optical fiber passes through the clamping area in an “S” shape, thereby enhancing the tensioning effect on the optical fiber. The second tensioning assembly 10 is similar in structure to the first tensioning assembly 8, and the difference lies in that the compression roller 83 of the second tensioning assembly 10 is located above the two supporting rollers 82 and used to apply a slight constraint force to the upper surface of the optical fiber tape.

[0059] Please refer to Figure 1 and Figure 2 In the embodiment, the rack 1 is further provided with a tape laying forming die 11 and a curing device 12. The curing device 12 is electrically connected with the PLC controller, and the tape laying forming die 11 and the curing device 12 are located between the second tensioning assembly 10 and the take-up device 3, and are sequentially arranged along the moving direction of the optical fiber tape. The tape laying forming die 11 comprises a shaping channel through which the optical fiber tape passes, and the cross-sectional shape of the shaping channel is adapted to the optical fiber tape to define the width and thickness of the optical fiber tape. In order to facilitate cleaning, the tape laying forming die 11 can be provided with a base and an upper cover detachably connected to the base by bolts, and the shaping channel is formed on the base. In another embodiment, the above-mentioned tape laying device 5 can also be used as the tape laying forming die 11, but when it is used as the tape laying forming die 11, the buffer assembly is not arranged on the tape laying roller 51, and the length of the circumferential groove on the tape laying roller 51 in the axial direction is adapted to the nominal width of the optical fiber tape, so as to constrain the optical fiber tape. The curing device 12 comprises a curing box, and the curing box is provided with an inlet and an outlet through which the optical fiber tape passes. The curing box is provided with a UV irradiation unit above and below the optical fiber tape. The UV irradiation unit comprises a UV lamp, and the specific driving circuit and control mode thereof can adopt the existing technology mature in the art, which will not be described here.

[0060] Please refer to Figure 1 and Figure 2In the embodiment, the line separating device 6 is arranged on the rack 1 and located between the first tensioning assembly 8 and the unwinding device 2. The line separating device 6 comprises a line separating frame 61 fixed on the rack 1, a line separating roller 63 and a line pressing roller 62 arranged on the line separating frame 61. The line separating roller 63 and the line pressing roller 62 are rotationally connected with the rack 1 respectively. The line separating roller 63 is provided with a plurality of line separating grooves 631 for arranging a plurality of optical fibers respectively. The line pressing roller 62 is used for pressing the optical fibers in the line separating grooves 631.

[0061] Referring to Figure 2 Further, the pre-bundling device 7 is arranged between the line separating device 6 and the first tensioning assembly 8. The pre-bundling device 7 is identical to the above-mentioned bundling device 5 except that the bundling roller 51 of the pre-bundling device 7 is not provided with the buffer assembly. The pre-bundling device 7 is used for initially bundling and regularizing the optical fibers preliminarily combed by the line separating device 6, so that the optical fibers form an orderly strip-shaped structure before entering the first tensioning assembly 8.

[0062] Referring to Figure 2 , Figure 4 and Figure 9 The application further discloses a production method of the winding optical fiber ribbon and a production device thereof. The production method comprises the following steps:

[0063] S1, unwinding a plurality of optical fibers through the unwinding device 2;

[0064] S2, guiding the plurality of optical fibers between the two bundling devices 5 to form an optical fiber ribbon, and moving the optical fiber ribbon intermittently by the winding device 3. The optical fiber ribbon advances a preset area segment each time.

[0065] S3, during the movement of the optical fiber ribbon, controlling the plurality of point glue needles 42 to ascend, the tapered needle tip 421 inserts into and expands the gap between the adjacent optical fibers, the resin flows out from the liquid outlet hole 422 and forms a liquid bead at the tapered needle tip 421, then controlling the plurality of point glue needles 42 to descend, the gap between the adjacent optical fibers rebounds and reduces to the initial state, the liquid bead is separated from the tapered needle tip 421 under the action of the gap rebound, and penetrates into the gap between the adjacent optical fibers under the action of gravity, thereby forming a plurality of spaced adhesive nodes 13 in the current preset area segment.

[0066] S4, curing the adhesive nodes formed on the optical fiber ribbon after step S3.

[0067] The specific curing step is that the optical fiber ribbon after step S3 is subjected to re-bundling constraint through the bundling forming die 11, and the curing of the adhesive nodes 13 in the current area segment is completed in the curing device 12.

[0068] Further, the step S5 is further included, and the step S5 specifically comprises: repeating the step S3 to the step S4 until the forming and curing of the bonding node 13 are completed on all subsequent area sections of the optical fiber ribbon.

[0069] The foregoing description of the disclosed embodiments enables a person skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A production equipment for winding optical fiber ribbon, comprising a frame, a wire feeding device and a wire take-up device disposed on the frame, characterized in that: It also includes a dispensing device and two parallel belt devices mounted on the frame; Two parallel-bearing devices are spaced apart between the pay-off device and the take-up device. Each parallel-bearing device includes a support and a parallel-bearing roller and a pressure roller mounted on the support. The parallel-bearing roller has a parallel-bearing groove for arranging multiple optical fibers into an optical fiber ribbon, and the pressure roller is used to press the optical fiber ribbon into the parallel-bearing groove. The dispensing device is located below the optical fiber strip between the two parallel devices. The dispensing device includes multiple dispensing needles and a lifting assembly for driving the multiple dispensing needles to rise and fall. The dispensing needles are provided with liquid outlet holes inside and tapered needle tips at their ends. The lifting assembly includes a connecting plate, a base plate mounted on the frame, and a lifting plate slidably connected to the base plate via a lifting shaft. The connecting plate is fixedly connected to the end of the lifting shaft away from the lifting plate. A servo electric cylinder is connected between the connecting plate and the base plate. The lifting plate is provided with a transverse moving platform that can be adjusted in position along the width of the fiber optic strip. A needle plate is connected to the transverse moving platform via a pressure sensor. Multiple dispensing needles are mounted on the needle plate according to the positions of preset bonding nodes. The dispensing device also includes a dispensing valve that communicates with the dispensing needles. During the upward movement of the dispensing needle, the tapered needle tip can insert into and widen the gap between adjacent optical fibers. Resin flows out from the outlet hole and forms a droplet at the tapered needle tip. During the downward movement of the dispensing needle, the droplet detaches from the tapered needle tip and seeps into the gap between adjacent optical fibers with reduced resilience, so as to form an adhesive node on the optical fiber ribbon.

2. The production equipment for windable optical fiber ribbons according to claim 1, characterized in that: The parallel belt roller is provided with a circumferential groove, and buffer components are respectively provided on both sides of the parallel belt roller located in the circumferential groove. The inner sidewalls of the two buffer components and the bottom of the circumferential groove together form the parallel belt groove. The two buffer components are used to apply lateral elastic constraint to the optical fiber strip in the parallel belt groove.

3. The production equipment for windable optical fiber ribbons according to claim 2, characterized in that: Each of the buffer components includes a buffer ring, a guide shaft, and a spring. The buffer ring is axially slidably connected to the belt roller located in the circumferential groove, and the outer diameter of the buffer ring is smaller than the top diameter of the circumferential groove. The parallel roll is provided with a stepped groove, which extends along the sliding direction of the buffer ring. The stepped groove includes a small diameter groove and a large diameter groove arranged sequentially from the side near the circumferential groove toward the end of the parallel roll. The buffer ring is slidably connected to the stepped groove via the guide shaft. One end of the guide shaft is fixed to the buffer ring, and the other end passes through the small diameter groove and extends into the large diameter groove. Within the large-diameter groove, a limit nut is connected to the end of the guide shaft, and a set screw is threaded to the end of the large-diameter groove away from the limit nut. The spring is disposed within the large-diameter groove located between the limit nut and the set screw.

4. The production equipment for windable optical fiber ribbons according to claim 1, characterized in that: The take-up device includes a servo geared motor fixed on the frame, a take-up shaft fixed on the output end of the servo geared motor, and a take-up reel sleeved on the take-up shaft.

5. The production equipment for windable optical fiber ribbons according to claim 1, characterized in that: The frame is also provided with a first tensioning assembly and a second tensioning assembly. The first tensioning assembly and the second tensioning assembly are respectively located on opposite sides of the two parallel belt devices, and the first tensioning assembly is located on the side closer to the wire feeding device. The first tensioning assembly includes a tensioning frame fixed on the frame, a pressure roller and two support rollers arranged on the tensioning frame. The two support rollers are arranged in parallel to support the lower surface of multiple optical fibers, and the pressure roller is located between the two support rollers to press the upper surface of multiple optical fibers.

6. The production equipment for windable optical fiber ribbons according to claim 5, characterized in that: It also includes a strip forming mold and a curing device disposed on the frame, wherein the strip forming mold and the curing device are located between the second tensioning assembly and the take-up device, and are arranged sequentially along the moving direction of the optical fiber strip; The forming mold includes a shaping channel through which the optical fiber ribbon passes, the cross-sectional shape of which is adapted to the optical fiber ribbon to define the width and thickness of the optical fiber ribbon. The curing device includes a curing chamber with an inlet and an outlet for the optical fiber ribbon to pass through. UV irradiation units are respectively arranged above and below the optical fiber ribbon inside the curing chamber.

7. The production equipment for windable optical fiber ribbons according to claim 1, characterized in that: It also includes a visual inspection device located above the fiber optic strip between the two parallel strip devices. The visual inspection device is used to identify the gap position of adjacent fibers on the fiber optic strip and generate a position signal. The lateral moving platform adjusts its lateral position according to the position signal so that the conical tip of the dispensing needle is aligned with the gap between the adjacent fibers.

8. The production equipment for windable optical fiber ribbons according to claim 5, characterized in that: It also includes a splitting device disposed on the frame, the splitting device being located between the first tensioning assembly and the wire feeding device, the splitting device including a splitting frame fixed on the frame, a splitting roller and a pressing roller disposed on the splitting frame, the splitting roller being provided with multiple splitting grooves for arranging multiple optical fibers, and the pressing roller being used to press the optical fibers into the splitting grooves.

9. A method for producing a windable optical fiber ribbon, using the production equipment for windable optical fiber ribbons as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Multiple optical fibers are unwound using a wire feeding device; S2. Guide multiple optical fibers between the two parallel tape devices to form an optical fiber ribbon, and have the fiber ribbon pulled by the take-up device to move intermittently, while maintaining a constant tension between the two parallel tape devices. Each time the fiber ribbon moves, it advances one preset area segment. S3. During the period when the optical fiber ribbon stops moving, control the multiple dispensing needles to rise, the conical needle tips insert into and widen the gap between adjacent optical fibers, resin flows out from the liquid outlet and forms liquid droplets at the conical needle tips, then control the multiple dispensing needles to fall, the liquid droplets detach from the conical needle tips and seep into the gap between adjacent optical fibers with reduced rebound, thereby forming multiple spaced adhesive nodes within the current preset area segment; S4. Curing the bonded nodes formed on the optical fiber ribbon after completing step S3.

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