CN103587019B - Optical fiber bundle forming equipment and forming method thereof - Google Patents

Abstract

The invention discloses a molding device of an optical fiber bundle, which sequentially comprises a ribbon pay-off machine, a polymerization mould, a preforming mould, an intermittent coating mould, an ultraviolet curing device and a take-up device; the preforming mold is provided with a molding cavity, the inner wall of the molding cavity is provided with a molding groove, the cross section of the molding cavity is formed by a plurality of circular arcs in an annular array arrangement, one end of the molding cavity is set as a molding inlet, the other end of the molding cavity is set as a molding outlet, and the area of the cross section of the molding cavity from the molding inlet to the molding outlet is gradually reduced; the intermittent coating mould is of a tubular structure with a hollow inner cavity, and the inner wall of the intermittent coating mould is provided with a groove. The loose tube type or loose layer stranded optical cable manufactured by the method has the advantages of small optical cable outer diameter, higher optical fiber density and light weight; meanwhile, the periphery of the bundle-shaped optical fiber is coated with the ultraviolet curing resin intermittently, so that the resin is saved, the optical fiber has a certain degree of freedom, the mutual influence among the optical fibers is small, and the stress on the optical fiber is small.

Description

Optical fiber bundle forming equipment and forming method thereof

technical field

The invention belongs to the technical field of optical cable manufacturing, and in particular relates to an optical fiber bundle forming device and a forming method thereof.

Background technique

At present, with the development of fiber-to-the-home (FTTH) construction, the amount of information transmission and the demand for broadband services continue to grow, and the demand for large-core optical cables has increased significantly. The large-scale construction of metropolitan area network and access network makes the pipeline resources of urban optical cable layout more and more precious, and the large-core optical cable is limited by the space of urban underground pipelines.

my country is laying a large number of feeder optical fiber ribbon cables in the metropolitan area network and access network. The optical cable structure has three types: central beam tube type, loose tube layer stranding type and skeleton type. Skeleton optical fiber ribbon cable production equipment requires a lot of investment, the most complicated process, and the highest production cost. The main structure of my country's optical fiber ribbon cable is that the optical fiber ribbon is helically twisted into the loose tube structure. This structure has an obvious problem, that is, due to the different helical radii of the optical fiber ribbons of different layers, the length of the central layer and the side layer of the optical fiber ribbon is different. In addition, there are shortcomings such as uneven excess length and excessive twisting of optical fibers. At the same time, due to the helical twisting of the optical fiber ribbon, the optical fiber ribbon forms an almost fixed laminated body, making it difficult to increase the remaining length. In order to improve the tensile strength, the diameter of the reinforcement has to be increased, resulting in an increase in the diameter and hardness of the optical cable, which brings inconvenience to the construction, greatly increases the installation cost, and consumes limited urban pipeline space. However, the optical fiber bundle manufacturing methods and molds in the prior art produce an optical fiber bundle with low fiber density, high production cost and low production efficiency.

Contents of the invention

One of the objectives of the present invention is to overcome the shortcomings of the prior art and provide a forming equipment for optical fiber bundles, which has the characteristics of simple structure, low cost and high production efficiency, and the optical fiber bundles produced by it have high fiber density, It can effectively reduce the diameter and weight of the optical cable with a large number of cores, and is convenient to use and install.

The second object of the present invention is to overcome the shortcomings of the prior art and provide a method for forming a beam of light. Through the forming method, the production cost of the beam of light is reduced and the production efficiency is improved. The high fiber density of the optical fiber bundle can effectively reduce the diameter of the large-core optical cable, which can make the large-core optical cable suitable for the existing urban underground pipelines, and also reduce the raw material consumption and cost in optical cable manufacturing.

In order to solve the problems of the technologies described above, one of the objectives of the present invention is achieved through the following technical solutions:

A forming device for an optical fiber bundle,

Consisting of parallel pay-off machine, polymerization mould, preforming mould, intermittent coating mould, UV curing device and wire take-up device in sequence;

The preforming mold has a molding cavity, and the inner wall of the molding cavity is provided with a molding groove. The cross section of the molding cavity is composed of a number of circular arcs arranged in a circular array. One end of the molding cavity is set as the molding inlet, and the other end of the molding cavity is set as the molding Outlet, the area of the cross-section of the molding cavity from the molding inlet to the molding outlet is tapered;

The intermittent coating mold is a tubular structure with a hollow inner cavity. The inner wall of the intermittent coating mold is provided with grooves. The cross section of the hollow inner cavity is composed of a number of circular arcs arranged in a circular array. There are coating hole groups, the coating hole group is a plurality of coating holes arranged in a circular array, and the inner orifices of the coating holes communicate with the hollow inner cavity.

Further, the position of the inner opening of the coating hole is set corresponding to the junction of the two circular arcs.

Further, two groups of coating holes are provided along the axial direction of the intermittent coating mold, and the number of coating holes in each group corresponds to the number of grooves.

Preferably, one end of the intermittent coating mold is a coating inlet, the other end of the intermittent coating mold is a coating outlet, and the cross-sectional area of the hollow cavity from the coating inlet to the coating outlet is tapered.

Two of the purpose of the present invention is achieved through the following technical solutions:

A method for forming an optical fiber bundle, using the above-mentioned forming equipment, comprising the following steps:

(1) Polymerization: Accurately position several optical fibers on the unwinding machine through the polymerization mold, so that several scattered optical fibers are gathered together;

(2) Preforming: Pass the gathered optical fibers through a preforming mold, and squeeze them into bundled optical fibers for the first time;

(3) Coating resin: The bundled optical fiber passes through the intermittent coating mold, and the bundled optical fiber is squeezed again while coating the UV curable resin. The UV curable resin is intermittently added to the intermittent coating mold through the coating hole, and the bundle The outside of the optical fiber is coated with UV-curable resin at certain intervals;

(4) Curing: The bundled optical fiber passes through the ultraviolet curing device, and the ultraviolet curable resin coated on the outside of the bundled optical fiber is cured to form an optical fiber bundle;

(5) Take-up: Use a take-up device to collect the fiber bundles on the fiber bundle reel.

Further, the color of the ultraviolet curable resin can be any one of all the colors in the national standard color spectrum, so as to distinguish the optical fiber bundle.

Further, the length of the ultraviolet curable resin along the axial direction of the optical fiber bundle is 5 mm to 8 mm.

Further, the distance between the ultraviolet curable resins is 20mm to 25mm.

Further, the number of optical fibers of the optical fiber bundle is 2 to 12.

Compared with prior art, the beneficial effect of the present invention is:

An optical fiber bundle forming equipment according to the present invention, the dispersed optical fibers are assembled into an optical fiber bundle through a parallel pay-off machine, a polymerization mold, a preforming mold, an intermittent coating mold, an ultraviolet curing device and a wire take-up device, and The optical fiber enters the preforming mold with a hollow tubular structure whose diameter is gradually reduced from the forming inlet to the forming outlet, so that the optical fiber is subjected to a certain pressure, the gap between the optical fiber and the optical fiber is reduced, the density is increased, and it is preformed into a bundled optical fiber , when passing through the preforming mold, the forming grooves arranged in a circular array on the inner wall of the preforming mold make the optical fiber be squeezed in all directions during the preforming process, making the optical fiber more compact without redundant gaps, which is conducive to improving the optical fiber Density; similarly, when the optical fiber passes through the intermittent coating mold, the grooves arranged in a circular array inside also play the role of squeezing the bundled optical fiber in all directions, making the bundled optical fiber more compact, due to the required loose tube The inner diameter is smaller, and the outer diameter of the loose tube will be relatively reduced by more than 20%. The loose tube central beam tube type or loose tube stranded optical cable manufactured by this method has the advantages of small outer diameter, higher fiber density, and light weight. Advantages: At the same time, the ultraviolet curable resin is intermittently coated on the periphery of the bundled optical fiber, which saves the resin, and the optical fiber has a certain degree of freedom, the mutual influence between the optical fibers is small, and the stress on the optical fiber is small.

A method for forming an optical fiber bundle according to the present invention, through the steps of polymerization, preforming, resin coating, curing and winding, the loose fibers are formed into high-density bundled optical fibers, and the polymerization step initially gathers the loose fibers , a preforming step, using a preforming mold to preform the gathered optical fibers into a bundled optical fiber, a resin coating step, further extruding the bundled optical fiber to make it more compact, and intermittently coating the UV curable resin on the In addition to the bundled optical fiber, after the curing step, the optical fiber bundle is formed to obtain an optical fiber bundle with a high density and a certain degree of freedom. The resin is intermittently coated, which saves raw materials and lower production costs.

Description of drawings

Accompanying drawing is used for providing further understanding to the present invention, is used for explaining the present invention together with the embodiment of the present invention, does not constitute limitation of the present invention, in accompanying drawing:

Fig. 1 is the structural representation of the optical fiber bundle of the present invention;

Fig. 2 is a schematic structural diagram of direction A in Fig. 1;

Fig. 3 is the structural representation of the preform mold of the present invention;

Fig. 4 is the structural representation of intermittent coating mold of the present invention;

Fig. 5 is a schematic structural view of a forming device for an optical fiber bundle according to the present invention.

Figures 1 to 5 include:

1——optical fiber, 2——fiber optic bundle,

3—UV curable resin, 4—with pay-off machine,

5—polymerization mold, 6—preform mold,

7—Intermittent coating mold, 8—UV curing device,

9——Take-up device, 10——Forming groove,

11—groove, 12—coating hole,

13 - Forming import, 14 - Forming export,

15—coating inlet, 16—coating outlet.

Detailed ways

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

As shown in Figures 3 to 5, a forming device for an optical fiber bundle according to the present invention,

It includes a tape-and-tape pay-off machine 4 , a polymerization mold 5 , a preforming mold 6 , an intermittent coating mold 7 , an ultraviolet curing device 8 and a wire take-up device 9 . The preforming mold 6 has a molding cavity, and the inner wall of the molding cavity is provided with a molding groove 10. The cross section of the molding cavity is arranged in a circular array by several circular arcs. One end of the molding cavity is set as a molding inlet 13, and the other end of the molding cavity Set as the molding outlet 14, the area of the cross section of the molding cavity from the molding inlet 13 to the molding outlet 14 is tapered. The intermittent coating mold 7 is a tubular structure with a hollow inner cavity. The inner wall of the intermittent coating mold 7 is provided with grooves 11. The cross section of the hollow inner cavity is composed of a number of circular arcs arranged in a circular array. The intermittent coating mold 7 There are coating holes 12 groups arranged on the outer periphery of the coating hole. The coating holes 12 groups are a plurality of coating holes 12 arranged in a circular array, and the inner orifices of the coating holes 12 communicate with the hollow cavity. Further, the position of the inner opening of the coating hole 12 is set corresponding to the junction of two circular arcs. It corresponds to the gap between the two optical fibers 1 of the bundled optical fiber 1 , which is convenient for the ultraviolet curing resin 3 to bond the optical fibers 1 together. And it is convenient for the resin to flow in the groove 11 to form a sheet-like adhesion to wrap the bundled optical fiber 1 and make the adhesion firm. Further, two groups of coating holes 12 are provided along the axial direction of the intermittent coating mold 7 , and the number of coating holes 12 in each group corresponds to the number of grooves 11 . It is convenient for 360-degree all-round coating, wrapping the bundled optical fiber 1. Improving the coating efficiency can increase the running speed of the optical fiber 1 and improve the production efficiency. Preferably, one end of the intermittent coating mold 7 is the coating inlet 15, and the other end of the intermittent coating mold 7 is the coating outlet 16, and the area of the cross section of the hollow cavity from the coating inlet 15 to the coating outlet 16 is gradually shrink setting. The wide mouth enters the narrow mouth and exits, and further squeezes the bundled optical fiber 1 so that its diameter is fixed without any gaps, and the optical fiber 1 has a high density.

A method for forming an optical fiber bundle, using the above-mentioned optical fiber bundle forming equipment, comprising the following steps: (1) Polymerization: Precisely position a plurality of optical fibers 1 on a doubling and pay-off machine 4 through a polymerization mold 5 to make several optical fibers disperse The optical fibers 1 are gathered together. (2) Preforming: The bundled optical fibers 1 are passed through the preforming mold 6 to be squeezed into a bundled optical fiber 1 for the first time, and preformed into a bundled optical fiber 1 . (3) Coating resin: the bundled optical fiber 1 passes through the intermittent coating mold 7, and the bundled optical fiber 1 is squeezed again while coating the UV curable resin 3, and the UV curable resin 3 is intermittently added through the coating hole 12 A coating mold 7 is used to coat the outside of the bundled optical fiber 1 with an ultraviolet curable resin 3 at certain intervals. The secondary molding further increases the density of the optical fiber 1 , and extrusion while coating prevents the optical fiber 1 from rebounding. (4) Curing: the bundled optical fiber 1 passes through the ultraviolet curing device 8 to cure the ultraviolet curable resin 3 coated on the outside of the bundled optical fiber 1 to form an optical fiber bundle 2 . (5) Take-up: use the take-up device 9 to collect the fiber bundle 2 on the fiber bundle disk. Further, the color of the ultraviolet curable resin 3 can be any one of all the colors in the national standard color spectrum, so as to distinguish the optical fiber bundle 2 . As shown in FIG. 1 and FIG. 2 , the length of the ultraviolet curable resin 3 along the axial direction of the optical fiber bundle 2 is 5 mm to 8 mm. Further, the distance between the ultraviolet curable resins 3 is 20 mm to 25 mm. Further, the number of optical fibers 1 in the optical fiber bundle 2 is 2 to 12.

Working process of the present invention is:

As shown in Figure 5, the loose fiber is released by a belt pay-off machine 4, and then gathered by a polymerization mold 5, and the gathered optical fiber 1 penetrates into the preforming mold 6 through a wider entrance, and passes through a narrower forming exit 14. out, the optical fiber 1 is preformed into a bundled optical fiber 1, the bundled optical fiber 1 passes through the intermittent coating mold 7, and the ultraviolet curable resin 3 is intermittently coated on the outside of the bundled optical fiber 1, and after passing through the ultraviolet curing device 8, the ultraviolet light The cured resin 3 hardens, and the bundled optical fiber is shaped into an optical fiber bundle 2 as shown in FIG. 1 and FIG.

Compared with the existing optical fiber ribbon, the optical fiber bundle 2 manufactured by the above-mentioned molding method will not deteriorate the transmission performance of the edge fiber due to the bending of the optical cable or the flanging of the optical fiber ribbon, which improves the bending performance of the optical cable; due to the required loose sleeve The inner diameter of the tube is smaller, and the outer diameter of the loose tube will be relatively reduced by more than 20%. The loose tube central beam tube type or loose tube layer stranded optical cable manufactured by this method has the advantages of small outer diameter of the optical cable, higher density of optical fiber 1, and lower weight. The advantage of light weight; the bonding method of ultraviolet curing resin 3 intervals, the optical fiber 1 has a certain degree of freedom, the mutual influence between the optical fibers 1 is small, and the stress on the optical fiber 1 is small; between the optical fiber bundles 2 in the same loose tube The color distinction of the bonding resin does not need to be distinguished by the color of the binding yarn, which reduces the production process and facilitates the distinction.

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are equivalently replaced, but within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the present invention within the scope of protection.

Claims (9)

1. a former for fibre bundle, is characterized in that: comprise successively and be with paying out machine, polymerization mould, preforming tool, intermittent application mould, ultraviolet curing device and take-up; Described preforming tool has forming cavity, the inwall of described forming cavity is provided with forming tank, the cross section of described forming cavity forms for being arranged by some circular arc circular array, one end of described forming cavity is set to shaping import, other one end of described forming cavity is set to shaping outlet, and described forming cavity is that convergent is arranged from shaping import to the area of the cross section of shaping outlet; Described intermittent application mould is the tubular structure with hollow cavity, the inwall of described intermittent application mould is provided with groove, the cross section of described hollow cavity forms for being arranged by some circular arc circular array, the outer peripheral edge of described intermittent application mould offers coating hole group, and some coating holes of described coating Kong Zuwei circular array arrangement and the inner orifice in described coating hole are connected with described hollow cavity.

2. the former of a kind of fibre bundle according to claim 1, is characterized in that: the inner orifice position in described coating hole is arranged corresponding to the junction of two described circular arcs.

3. the former of a kind of fibre bundle according to claim 1, is characterized in that: the axis along described intermittent application mould is provided with described in two groups and applies hole group, and the quantity of the equal corresponding described groove of the number often organizing described coating hole is arranged.

4. the former of a kind of fibre bundle according to claim 1, it is characterized in that: one end of described intermittent application mould is coating import, other one end of described intermittent application mould is coating outlet, and described hollow cavity is that convergent is arranged from coating import to the area of the cross section applying outlet.

5. the forming method of a fibre bundle, it is characterized in that, adopt the former of the light shafts in above-mentioned 1 to 4 described in any one, comprise the following steps: (1) is polymerized: by some optical fiber and be with on paying out machine and accurately locate through polymerization mould, the gathering of the optical fiber that makes some disperse is together; (2) preformed: will optical fiber together be drawn in through preforming tool, carrying out first time extruding is pencil optical fiber; (3) coated with resins: pencil optical fiber is through intermittent application mould, pencil optical fiber is again extruded while coating ultraviolet light curing resin, UV-cured resin adds intermittent application mould, by the outside of described pencil optical fiber coating ultraviolet light curing resin at certain intervals off and on by coating hole; (4) solidify: the UV-cured resin of the outer application of described pencil optical fiber, through ultraviolet curing device, is cured formation fibre bundle by pencil optical fiber; (5) take-up: adopt take-up to be collected on fibre bundle dish by fibre bundle.

6. the forming method of a kind of fibre bundle according to claim 5, is characterized in that: the color of described UV-cured resin can select in all colours of national standard chromatogram any one, in order to distinguish described fibre bundle.

7. the forming method of a kind of fibre bundle according to claim 6, is characterized in that: described UV-cured resin is 5mm to 8mm along the length of described fibre bundle axis.

8. the forming method of a kind of fibre bundle according to claim 7, is characterized in that: the spacing distance between described UV-cured resin is 20mm to 25mm.

9. the forming method of a kind of fibre bundle according to claim 8, is characterized in that: the number of fibers of described fibre bundle is 2 to 12.