Manufacturing method of microwire guide optical fiber with special structure and microwire guide optical fiber

Abstract

The invention relates to the technical field of micro optical cables, and discloses a manufacturing method of a micro wire guide optical fiber with a special structure and the micro wire guide optical fiber, and the micro wire guide optical fiber is prepared through the following steps: step 1, raw material pay-off preparation and tension control; 2, arranging the fibers in bundles; step 3, primary coating and curing; and 4, secondary coating sealing and finished product rolling are conducted. According to the invention, the microwire guide optical fiber is integrally produced, the production speed (2000m / h) is high, the quality risk is small, and the production efficiency of the product is greatly improved; the surface of the micro-bending-resistant optical fiber is provided with ultra-molecular-weight fibers of a circular matrix, and the ultra-molecular-weight fibers are subjected to pressure coating of a mold cavity filled with a curing agent and then subjected to ultraviolet curing to form the fine optical fiber with a compact and stable structure.

Description

Technical Field

[0001] This invention relates to the field of micro-optical cable technology, specifically to a method for manufacturing micro-fiber with a special structure and the micro-fiber itself. Background Technology

[0002] Fiber optic guidance technology boasts significant advantages such as high information transmission capacity and strong anti-interference capabilities, and has been widely applied in fields such as unmanned aerial vehicles (UAVs), battlefield remote-controlled robots, and missiles. It is a wired remote control command guidance method that utilizes target and background image information acquired by the launch platform and bidirectional fiber optic transmission technology to perform manual or automated target detection, tracking, and identification of the transmitted information, generating control commands that are then uploaded to the launch platform to control and guide its operation. Specially structured micro-fibers serve as the carrier of information in fiber optic guidance and UAV flight control technology, enabling bidirectional data transmission between weapons and platforms, achieving precision guidance and flight control.

[0003] Most existing microfibers are aramid braided reinforced fiber-guided fibers, which are first braided with fine denier aramid and then cured in two steps. At the same time, the braiding speed (300m / h) is low, the overall efficiency is low, and the quality risk of the finished product is increased. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method for manufacturing microfiber with a special structure and a microfiber, solving the problems of low braiding speed and increased quality risks in the existing microfiber fabrication process. Furthermore, it addresses the issues of high material cost, high density, and increased overall weight of the fabricated microfiber.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for manufacturing a microfiber with a special structure specifically includes the following steps:

[0007] Step 1, Raw material feeding preparation and tension control: Install the anti-microbending optical fiber and UHMWPE fiber into the corresponding feeding mechanism of the active feeding device, and let them pass through the guide wheel of the active feeding device for posture alignment; by adjusting the swing amplitude of the dance wheel, control the output tension of the anti-microbending optical fiber and UHMWPE fiber to achieve stable active input of the two fibers;

[0008] Step 2, Fiber Bundling and Arrangement: With the anti-bending fiber as the central core, multiple UHMWPE fibers are evenly distributed around the anti-bending fiber to form a composite bundle; the composite bundle is pulled through the mold cavity of the pressure coating device, and after bundling and positioning, the bundle is initially pulled to the transition guide mechanism at the front end of the take-up shaft by the traction device to prepare for the subsequent coating process.

[0009] Step 3, First Coating and Curing: Turn on the pressure coating device and inject curing agent into the mold cavity. As the composite wire harness passes through the mold cavity, a layer of curing agent is evenly coated on its surface. Then, the composite wire harness coated with curing agent is introduced into the curing device. The curing device treats the composite wire harness so that the curing agent is completely cured, forming a pre-shaped composite wire. During this process, the take-up spool is started simultaneously to pre-wind the cured composite wire.

[0010] Step 4, Secondary Coating and Sealing, and Finished Product Rewinding: After the composite line has been initially cured and is stably transmitted, the production line continues to run. The pressure coating device is turned on again, and the sealing adhesive is injected into the mold cavity. The sealing adhesive is evenly coated on the surface of the composite line. The coated line continues to be introduced into the take-up shaft through the traction device. The take-up shaft is continuously wound at the set speed. After winding is completed, the take-up shaft is removed, and finally a micro-fine wire-guided optical fiber with a special structure is formed.

[0011] A microfiber with a special structure includes microbending-resistant fiber, UHMWPE fiber, curing agent and sealing adhesive, and is obtained by the manufacturing method described in claim 1.

[0012] Preferably, the curing agent is an ultraviolet curing agent.

[0013] Preferably, the diameter of the microfiber is 0.4±0.05μm.

[0014] Preferably, the tensile load of the microfiber is not less than 120N.

[0015] The present invention has the following beneficial effects:

[0016] This method for manufacturing microfiber with a special structure, and the resulting microfiber, involves surrounding the microfiber with ultra-high molecular weight polyethylene (UHMWPE) fibers. Through a suitable curing process, the fiber is firmly anchored in the center of the UHMWPE fibers, making it less susceptible to damage and ensuring low and stable transmission loss. Simultaneously, a curing agent is pressure-coated onto both the fiber and the UHMWPE fibers during manufacturing. This ensures the curing agent is uniformly adhered to both materials. After filtration and compaction in a mold, the bond between the fiber and the UHMWPE fibers is further strengthened, significantly improving the tensile strength of the microfiber. Throughout the manufacturing process, UHMWPE fibers are used instead of traditional fine-denier aramid fibers, resulting in lower material costs. Furthermore, UHMWPE fibers have a significantly lower specific gravity than fine-denier aramid fibers, greatly reducing the weight of the microfiber. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the micro-fiber conductive fiber structure of the present invention.

[0018] In the diagram: 1. Microbending resistant optical fiber; 2. UHMWPE fiber; 3. Curing agent; 4. Sealing adhesive. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1

[0021] In practical applications, a method for manufacturing a special type of microfiber with a fine wire guide includes the following steps:

[0022] Step 1: Raw material feeding preparation and tension control

[0023] The anti-bending fiber 1 and UHMWPE fiber 2 are respectively installed in the corresponding pay-off mechanisms of the active pay-off device (equipment model: XG-100 active pay-off machine, pay-off accuracy ±0.1m / min); both are passed through the guide wheels of the active pay-off device (made of alumina ceramic to avoid fiber wear) for posture alignment; by adjusting the swing amplitude of the dance wheel, the output tension of the anti-bending fiber 1 and UHMWPE fiber 2 is precisely controlled (process parameters: tension of anti-bending fiber 1 is controlled at 0.5-1.0N, and tension of UHMWPE fiber 2 is controlled at 0.3-0.8N), so as to achieve stable active input of the two fibers and ensure the subsequent bundling accuracy.

[0024] By monitoring the fiber surface in real time to ensure there are no scratches or breaks and the tension fluctuation is ≤ ±0.05N, the machine must be stopped immediately for adjustment if any abnormal tension occurs.

[0025] Step 2: Arrange fibers in bundles

[0026] Using the anti-bending optical fiber 1 as the central core, 6-8 UHMWPE fibers 2 are evenly distributed around the anti-bending optical fiber 1 at equal angles (45°-60°) to form a composite bundle. The composite bundle is then pulled through the mold cavity of the pressure coating device by a traction device (equipment model: QY-200 precision traction machine, traction speed 0.5-2.0m / min). After bundling and positioning, the bundle is initially pulled to the transition guide mechanism at the front end of the take-up shaft to prepare for the subsequent coating process.

[0027] The bundled state is observed in real time with the help of a CCD vision inspection system to ensure that the UHMWPE fiber 2 is evenly distributed and free from tangling, and that the micro-bending fiber 1 is centered and without deviation.

[0028] Step 3: One-time coating and curing

[0029] Turn on the pressure coating device (equipment model: TC-300 precision pressure coating machine, coating pressure 0.1-0.3MPa), and inject curing agent 3 (material selection: UV-curable acrylic resin, model EBECRYL 3700, viscosity 200-500mPa·s / 25℃) into the mold cavity; as the composite wire harness passes through the mold cavity, a layer of curing agent 3 is evenly coated on its surface; then, the composite wire harness coated with curing agent 3 is introduced into the curing device (equipment model: UV-1000 ultraviolet curing machine, wavelength 365nm, curing energy 80-120mJ / cm², curing temperature ≤60℃), and the curing agent 3 is completely cured by ultraviolet light irradiation to form a pre-shaped composite wire; during this process, the take-up shaft is started simultaneously (equipment model: SX-500 precision take-up machine, take-up rate matched with traction rate, error ≤±0.05m / min) to pre-wind the cured composite wire to ensure the continuity of wire transmission.

[0030] During quality control: after curing, the surface of the production line should be free of bubbles and drips, and the degree of curing should be ≥95% (detected by differential scanning calorimetry (DSC)); the coating thickness should be monitored in real time, and if any abnormal thickness occurs, the coating pressure or traction rate should be adjusted.

[0031] Step 4: Second coating and sealing, and finished product winding

[0032] After the composite yarn has been initially cured and is stably transmitted, the production line is kept running continuously. The pressure coating device is restarted, and sealing adhesive 4 (material selection: modified epoxy sealant, model EPON 828, mixed with curing agent 3DETA, mixing ratio 10:1, viscosity 500-800mPa·s / 25℃) is injected into the mold cavity. After impurities are removed by the 200-mesh stainless steel filter structure inside the mold, the sealing adhesive 4 is evenly coated on the surface of the composite yarn. The coated yarn is then introduced into the take-up spool by the traction device. The take-up spool is continuously wound at a set rate (0.5-2.0m / min), and the winding tension is controlled at 1.0-1.5N, so that the yarn forms a micro-adhesion state between the layers on the winding spool (adhesion strength is controlled at 0.05-0.1N to ensure easy peeling later). After winding is completed, the spool is placed in an environment of 25℃ and 50%RH for 24 hours to mature. Then the take-up spool is removed, and finally a micro-fine wire-guided optical fiber with a special structure is formed.

[0033] Key points of quality control: The surface of the finished product line is smooth and free of impurities. The micro-adhesion strength is tested by a tensile testing machine to ensure that it meets the requirements. The finished product must undergo light transmission performance testing (insertion loss ≤0.5dB / km) and mechanical performance testing (tensile strength ≥2.5GPa). Unqualified products must be rejected.

[0034] Example 2,

[0035] A microfiber with a special structure includes a microbending-resistant fiber 1, a UHMWPE fiber 2, a curing agent 3 and a sealing adhesive 4, and is obtained by the manufacturing method as described in Example 1.

[0036] In this embodiment, the curing agent 3 is a UV curing agent 3.

[0037] In this embodiment, the diameter of the microfiber is 0.4±0.05μm.

[0038] In this embodiment, the tensile load of the microfiber is not less than 120N.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a microfiber with a special structure, characterized in that, Specifically, the following steps are included: Step 1, Raw material feeding preparation and tension control: Install the anti-microbending optical fiber and UHMWPE fiber into the corresponding feeding mechanism of the active feeding device, and let them pass through the guide wheel of the active feeding device for posture alignment; by adjusting the swing amplitude of the dance wheel, control the output tension of the anti-microbending optical fiber and UHMWPE fiber to achieve stable active input of the two fibers; Step 2, Fiber Bundling and Arrangement: With the anti-bending fiber as the central core, multiple UHMWPE fibers are evenly distributed around the anti-bending fiber to form a composite bundle; the composite bundle is pulled through the mold cavity of the pressure coating device, and after bundling and positioning, the bundle is initially pulled to the transition guide mechanism at the front end of the take-up shaft by the traction device to prepare for the subsequent coating process. Step 3, First Coating and Curing: Turn on the pressure coating device and inject curing agent into the mold cavity. As the composite wire harness passes through the mold cavity, a layer of curing agent is evenly coated on its surface. Then, the composite wire harness coated with curing agent is introduced into the curing device. The curing device treats the composite wire harness so that the curing agent is completely cured, forming a pre-shaped composite wire. During this process, the take-up spool is started simultaneously to pre-wind the cured composite wire. Step 4, Secondary Coating and Sealing, and Finished Product Rewinding: After the composite line has been initially cured and is stably transmitted, the production line continues to run. The pressure coating device is turned on again, and sealing adhesive is injected into the mold cavity. The sealing adhesive is evenly coated on the surface of the composite line. The coated line continues to be introduced into the take-up shaft through the traction device. The take-up shaft is continuously wound at the set speed. After winding is completed, the take-up shaft is removed, and finally a micro-fine wire-guided optical fiber with a special structure is formed.

2. A microfiber with a special structure, characterized in that: It includes microbending-resistant optical fiber, UHMWPE fiber, curing agent and sealing adhesive, and obtains microfiber by the manufacturing method as described in claim 1.

3. The microfiber with a special structure according to claim 2, characterized in that: The curing agent is a UV curing agent.

4. The microfiber with a special structure according to claim 2, characterized in that: The diameter of the microfiber is 0.4±0.05μm.

5. The microfiber with a special structure according to claim 2, characterized in that: The tensile load of the microfiber is not less than 120N.

Images