Special mold for preparing hollow optical fiber cable reinforcing core

Abstract

The utility model relates to a special mold for preparing a hollow optical fiber cable reinforced core. The special mold comprises a mold frame, a plurality of front-section molds and a plurality of rear-section molds, a plurality of mounting through holes are formed in the mold frame side by side at equal intervals; the plurality of front section molds are fixed in the plurality of mounting through holes one by one; a hollow core rod is arranged in the front section mold; a channel hole is formed in the center of one end of the hollow core rod; feeding through holes are formed in the positions, located on the periphery of each front-section mold, of the front side face of the mold frame in an annular array mode, and the tail ends of the feeding through holes all point to the outer wall of the hollow core rod to form a horn shape; the rear section mold is located at the rear end of the mold frame, and a through hole is formed in the position, right opposite to each front section mold, of the rear section mold; and the rear end of the hollow core rod is placed in the through hole. According to the utility model, a hollow optical fiber cable reinforced core can be prepared, and when the optical cable is bent or pulled, the optical fiber cannot be influenced due to different tension coefficients of all parts.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cable preparation, and particularly relates to a special mold for preparing a hollow optical fiber cable strengthening core. Background Art

[0002] The optical fiber strengthening core, as a key component in the optical cable, mainly plays the role of supporting and strengthening the structure of the optical cable. It is widely used in various optical cables, especially in scenarios with high requirements for the performance of optical cables, such as long-distance communication, submarine optical cables, industrial control networks, etc. The optical cables in these scenarios need to withstand harsher environmental conditions and more complex physical attacks, so the optical fiber strengthening core is more needed to provide additional support and protection.

[0003] In summary, the optical fiber strengthening core is an indispensable key component in the optical cable. By providing additional physical support and protection, it significantly improves the overall performance and service life of the optical cable.

[0004] The optical fiber strengthening cores currently used in the market are all solid, and the conventional size is It is formed by combining glass fiber or aramid fiber and resin through the use of specific heat-curing molds (such as Figure 1 ) and heat-curing equipment to finally form the optical fiber strengthening core. The current solution has the following several defects: 1. The technical process is relatively complex and requires specific molds and equipment. 2. The optical fiber sheath is easily damaged, and once damaged, it will affect the use of optical fiber communication. 3. Due to the large differences in the tension coefficients of various materials such as optical fiber, optical fiber strengthening core, lifting strengthening member, and sheath (the wire laying tension of the lifting strengthening member is 950g - 1050g; the wire laying tension of the optical fiber strengthening core is 480g - 520g; the wire laying tension of the optical fiber is 90g - 110g; the optical cable take-up tension is 1400g - 1600g), when the optical cable is bent or pulled, the most vulnerable optical fiber core wire is most likely to be damaged. Content of the Utility Model

[0005] The purpose of the utility model is to provide a special mold for preparing a hollow optical fiber cable strengthening core, which can prepare a hollow optical fiber cable strengthening core, and the optical fiber will not be affected due to different tension coefficients of each component when the optical cable is bent or pulled.

[0006] To achieve the above-mentioned purpose of the utility model, a special mold for preparing a hollow optical fiber cable strengthening core of the utility model includes a mold frame, a plurality of front-section molds and a plurality of rear-section molds;

[0007] A plurality of installation through holes are arranged side by side and at equal intervals on the mold frame. The installation through holes are horizontally arranged and penetrate through the front and rear sides of the mold frame. The number of the installation through holes is equal to the number of the front-section molds;

[0008] A plurality of the front section molds are respectively fixed in a plurality of the installation through holes;

[0009] A hollow mandrel is arranged inside the front section mold, and the hollow mandrel penetrates through the front and rear ends of the front section mold;

[0010] A channel hole is arranged at the center of one end of the hollow mandrel, the channel hole penetrates through both ends of the hollow mandrel, and the channel hole and the hollow mandrel share the same axis;

[0011] On the front side surface of the mold base, feeding through holes are arranged in an annular array around each front section mold, and the ends of the feeding through holes all point to the outer wall of the hollow mandrel, forming a horn shape;

[0012] The rear section mold is located at the rear end of the mold base, and through holes are arranged at the positions of the rear section mold opposite to each front section mold, and the through holes penetrate through both ends of the rear section mold;

[0013] The rear end of the hollow mandrel is placed in the through hole and extends to the rear end of the rear section mold;

[0014] A heater is arranged inside the rear section mold.

[0015] Preferably, a gap is left between the front section mold and the rear section mold.

[0016] Specifically, the rear section mold includes a lower mold and an upper mold;

[0017] The lower mold and the lower mold are detachably fixed;

[0018] A plurality of semi-circular grooves are arranged on the upper surface of the lower mold and the lower surface of the upper mold along the transmission direction of the optical fiber core wire. The semi-circular grooves of the lower mold and the semi-circular grooves of the upper mold correspond to each other one by one to form through holes.

[0019] Furthermore, horn-shaped inlets are arranged around each semi-circular groove at the front end of the lower surface of the upper mold and the front end of the upper surface of the lower mold.

[0020] Compared with the prior art, the present utility model further has the following advantages:

[0021] (1) Abandon the original 5-hole front-end structure, and make the hollow mandrel and the glass fiber wire inlet into a split type, which is convenient for the later maintenance and replacement of the mandrel;

[0022] (2) The optical fiber feeds from above, avoiding wire entanglement caused by the same direction as the glass fiber wire feeding direction;

[0023] (3) The front-section mold and the rear-section mold are separable, which can timely remove the excess resin generated when the glass fiber enters the rear-section forming mold, avoiding the resin remaining inside the mold and causing the resin to cure inside the mold;

[0024] (4) The rear-section mold is changed to an upper and lower separable type. The processing technology of the separable mold is the same as that of the existing solid reinforcing core mold, ensuring the product stability and quality; the upper and lower separable forming mold can be repaired and maintained later, while the integral type does not have the condition of repeated use; the upper and lower separable forming mold can increase the mold length according to requirements, thereby increasing the wire drawing speed and improving production efficiency; the upper and lower separable forming mold is similar to the mold blank of the existing solid reinforcing core mold, facilitating later mold modification and saving costs. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the thermal curing mold in the background technology;

[0026] Figure 2 is a schematic structural diagram of a special mold for preparing a hollow optical fiber cable reinforcing core in Embodiment 1;

[0027] Figure 3 is a schematic structural diagram of the mold base in Embodiment 1;

[0028] Figure 4 is an exploded view of a special mold for preparing a hollow optical fiber cable reinforcing core in Embodiment 1;

[0029] Figure 5 is Figure 4 the partial enlarged view at A in Detailed Embodiments

[0030] The following further describes the present invention in conjunction with the drawings and specific embodiments.

[0031] Embodiment 1

[0032] As Figure 2 shown, a special mold for preparing a hollow optical fiber cable reinforcing core includes a mold base 1, a plurality of front-section molds 2 and a plurality of rear-section molds 3.

[0033] As Figure 3 shown, a plurality of mounting through holes 4 are arranged side by side and at equal intervals on the mold base 1. The mounting through holes 4 are horizontally arranged and penetrate through the front and rear sides of the mold base 1. The number of the mounting through holes 4 is equal to the number of the front-section molds 2.

[0034] A plurality of the front-section molds 2 are fixedly arranged in a plurality of the mounting through holes 4 one by one; a hollow mandrel 5 is arranged in the front-section mold 2, and the hollow mandrel 5 penetrates through the front and rear ends of the front-section mold; a channel hole (not shown in the figure) is arranged at the center of one end of the hollow mandrel 5, the channel hole penetrates through both ends of the hollow mandrel 5, and the channel hole shares the same axis with the hollow mandrel 5;

[0035] On the front side surface of the mold frame 1, feeding through holes 6 are arranged in an annular array around each front-section mold 2, and the ends of the feeding through holes 6 all point to the outer wall of the hollow mandrel 5, forming a horn shape; this facilitates subsequent glass fibers to wrap around the hollow mandrel from all around and pass through the rear-section forming mold.

[0036] The rear-section mold 3 is located at the rear end of the mold frame 1. Through holes are arranged at positions of the rear-section mold 3 opposite to each front-section mold 2, and the through holes penetrate through both ends of the rear-section mold 3; the rear end of the hollow mandrel 5 is placed in the through holes and extends to the rear end of the rear-section mold 3 all the time; a heater (not shown in the figure) is arranged in the rear-section mold 3.

[0037] In this embodiment, as Figure 2 shown, a gap is left between the front-section mold 2 and the rear-section mold 3, which can timely discharge the redundant resin generated when the glass fiber enters the rear-section forming mold, and avoid the resin remaining in the mold interior and causing the resin to cure inside the mold.

[0038] In this embodiment, as Figure 4 shown, the rear-section mold 3 includes a lower mold 7 and an upper mold 8; the lower mold 7 and the upper mold 8 are detachably fixed; a plurality of semi-circular grooves 9 are arranged on the upper surface of the lower mold 7 and the lower surface of the upper mold 8 along the transmission direction of the optical fiber core line, and the semi-circular grooves of the lower mold and the semi-circular grooves of the upper mold correspond to each other one by one to form through holes.

[0039] Further, in this embodiment, as Figure 5 shown, horn-shaped inlets 10 are arranged at the front ends of the lower surface of the upper mold 7 and the upper surface of the lower mold 8 around the periphery of each semi-circular groove, which is convenient for introducing the preliminarily formed optical fiber strengthening core.

[0040] Embodiment 2

[0041] The second object of the present utility model is to provide a process for preparing a hollow optical fiber cable strengthening core, which adopts the above-mentioned special mold and includes the following steps,

[0042] S1. Lead out glass fibers of corresponding mesh number and divide them into several strands;

[0043] S2. Pass several strands of glass fibers through a resin tank;

[0044] S3. Pass the glass fiber after passing through the resin tank through the feeding through hole on the die carrier, and at the same time thread the optical fiber core wire into the hollow mandrel;

[0045] S4. Converge the glass fibers into one strand and wrap the hollow mandrel from four directions, and pass through the rear-stage forming die;

[0046] S5. Cure through the curing equipment to form the strengthening core.

[0047] In this embodiment, as Figure 2 shown, in step S3, the optical fiber core wire 11 is drawn into the hollow mandrel from above to avoid wire entanglement caused by being in the same direction as the feeding direction of the glass fiber.

[0048] In this embodiment, after step S4, step S5 is further included. The strengthening core prepared in step S4 is further cured by a photothermal curing equipment to improve the curing effect of the optical fiber strengthening core.

[0049] In this embodiment, after step S5, step S6 is further included. The cured and formed strengthening core is finally collected on the wire reel through the traction of the traction disc, and the finished product is a hollow strengthening core with an optical fiber.

[0050] In this embodiment, in step S2, pigments of different colors are provided in the resin tanks corresponding to different strands of glass fibers, and the optical fiber strengthening cores are distinguished by different colors, so as to facilitate wiring when using the optical cable subsequently.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A special mold for preparing a hollow optical fiber cable reinforcement core, characterized in that: It includes a mold frame, a plurality of front-end molds and a plurality of rear-end molds; The mold frame is provided with a plurality of mounting through holes arranged side by side and at equal intervals. The mounting through holes are arranged horizontally and penetrate the front and rear sides of the mold frame. The number of the mounting through holes is equal to the number of the front-stage molds. The plurality of front section molds are fixed one by one in the plurality of mounting through holes; A hollow core rod is provided in the front section mold, and the hollow core rod passes through the front and rear ends of the front section mold; A channel hole is provided at the center of one end of the hollow core rod, the channel hole passes through both ends of the hollow core rod, and the channel hole and the hollow core rod share the same axis; Feed holes are arranged in a circular array around each front mold on the front side of the mold frame, and the ends of the feed holes are directed toward the outer wall of the hollow core rod to form a trumpet shape; The rear section mold is located at the rear end of the mold frame, and a through hole is provided on the rear section mold at a position directly facing each of the front section molds, and the through hole runs through both ends of the rear section mold; The rear end of the hollow core rod is placed in the through hole and extends to the rear end of the rear section mold; A heater is arranged in the rear section mold.

2. A special mold for preparing a hollow optical fiber cable reinforcement core according to claim 1, characterized in that: A spacing is left between the front section mold and the back section mold.

3. A special mold for preparing a hollow optical fiber cable reinforcement core according to claim 1 or 2, characterized in that: The rear section mold comprises a lower mold and an upper mold; The upper and lower molds are detachably fixed; The upper surface of the lower mold and the lower surface of the upper mold are both provided with a plurality of semicircular grooves along the transmission direction of the light core line, and the semicircular grooves of the lower mold correspond to the semicircular grooves of the upper mold one by one to form through holes.

4. A special mold for preparing a hollow optical fiber cable reinforcement core according to claim 3, characterized in that: A trumpet-shaped inlet is provided at the front end of the lower surface of the upper mold and the front end of the upper surface of the lower mold around each semicircular groove.

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