A method and device for producing cold chemical foaming cable core filling

Abstract

The invention discloses a cold chemical foaming cable core filling production method and device, belonging to the field of optical cable technology, the device comprises a cold foaming device, a rotary joint, a cabling machine cage, an injection system, a shaping and shaping mold, a spraying system, and an ultraviolet light curing pipeline connected in sequence; the cold foaming device is used to produce foaming material; the rotary joint adopts a rotary connection device to prevent backflow and overflow; the cabling machine cage is used to cable and twist multiple cable core elements; the injection system is connected to the cold foaming device through a rotary joint, the injection system has a manifold branch, aligns with the gap of the cabling core and injects the foaming material to fill, and obtains the cabling core; the spraying system is used to spray the ultraviolet light curing material on the cabling core after shaping; the ultraviolet light curing pipeline is used to irradiate and cure the ultraviolet light curing material to form a protective layer. The device can improve the cabling production efficiency and cabling quality of the cabling core.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cables, and particularly relates to a cold chemical foaming cable core filling production method and device. Background Art

[0002] The main purpose of cable core filling is to ensure the structural stability between the cores inside the cable and to ensure that the cable core is round. Cable core filling is an important part of the cable manufacturing process, which involves adding specific filling materials to the gaps between the insulated cable cores or wire pairs.

[0003] Filling materials can support the internal space of the cable and prevent the cable from being deformed or damaged during transportation and use. Filling materials can block external moisture and humidity from entering the cable, protecting the electrical components inside the cable from the impact of humid environments. Filling materials can reduce the air gap inside the cable, thereby reducing capacitance, reducing inductance, and improving the electrical performance of the cable.

[0004] The cable filling process refers to the process of filling the gaps in the cable core or wire core with filling materials. During the filling process, it is necessary to ensure that the filling materials are evenly distributed to avoid local accumulation or vacancies. At the same time, factors such as the shrinkage and fluidity of the filling materials need to be considered to ensure the best filling effect.

[0005] When filling the actual cable, choose the appropriate filling material according to the cable type, environmental conditions and economic factors. The filling amount should not be too much or too little. Too much will increase the weight and cost of the cable, and too little will not play an effective filling role. During the filling process, the quality of the filling material and the process parameters need to be strictly controlled to ensure that the filling quality meets the requirements. Cable core filling is an important link in the cable manufacturing process, which involves the selection of filling materials, the control of filling process and the guarantee of filling quality. Through reasonable filling design and process control, the cable can be ensured to have a stable structure, excellent electrical performance and a long service life.

[0006] At present, the cable core filling method mainly adopts physical methods, such as polypropylene tear filling rope, alkali-free glass fiber filling rope, fan-shaped filling strips, etc. In the production process of cable core components, the filling rope material, specification, quantity, etc. are different for cables with different outer diameters and different structures. Replacing a cable core component of a certain specification requires changing the filling rope specification. The process is not only time-consuming and cumbersome, but also due to the flipping of the cable component during the laying process, the filling cannot be well adapted to the irregular-shaped cable components, which leads to a decrease in the roundness of the cable core.

[0007] Therefore, in order to improve the production efficiency of cable core components and improve the roundness of cable core components, it is imperative to change the filling method of cable cores. Summary of the invention

[0008] In order to solve the problem of mismatch between the shape of irregular cable core elements and prefabricated solid filling materials, the present invention provides a cold chemical foaming cable core filling production method and device, which can improve the cable core cabling production efficiency and cabling quality.

[0009] The technical solution adopted by the present invention is as follows:

[0010] In a first aspect, the present invention provides a cold chemical foaming cable core filling production device, comprising a cold foaming device, a rotary joint, a cabling machine cage, an injection system, a shaping mold, a spraying system, and an ultraviolet light curing pipeline connected in sequence;

[0011] The cold foaming device is used to produce foaming material;

[0012] The rotary joint adopts a rotary connection device that prevents backflow and overflow;

[0013] The cabling machine cage is used to cable and twist multiple cable core elements to obtain a cable core;

[0014] The injection system is connected to the cold foaming device through a rotary joint, and the injection system has a manifold branch, which is aligned with the gap between the cable cores and injects foaming material for filling;

[0015] The shaping and finalizing mold is used to finalize the outer diameter of the cable core after foaming and filling;

[0016] The spraying system is used to spray the ultraviolet curing material on the cable core after shaping;

[0017] The ultraviolet light curing pipeline is used for irradiating and curing the ultraviolet light curing material to form a protective layer.

[0018] As a further improvement of the present invention, the rotary joint includes a rotary head and a stationary core, wherein the rotary head has a front inner cavity and a tail cavity, the inner wall of the front inner cavity of the rotary head is engraved with physical patterns, and the tail cavity of the rotary head is filled with oily filler; the stationary core has a stationary core body and a stationary core tail; the stationary core body has the same structure as the front inner cavity of the rotary head and is smoothly connected, and the stationary core tail has the same structure as the tail cavity of the rotary head and is tightly fitted.

[0019] As a further improvement of the present invention, the stationary core body is a conical structure, the tip of the conical structure has a feed port, and the feed port is connected to the cold foaming device.

[0020] As a further improvement of the present invention, the stationary core tail includes a rotating pipeline, a plurality of spaced discs are arranged outside the rotating pipeline, and the rotating pipeline is connected to the feed port; the oily filler is filled in the gap between the disc and the rotating head and tail cavity.

[0021] As a further improvement of the present invention, the manifold branch includes a main line, a branch manifold, and an electrically controlled injection nozzle; one end of the main line is connected to the rotary joint, and the other end is connected to the branch manifold, and the branch manifold is arranged on the periphery of the axis of the main line, and the branch manifold branches to multiple electrically controlled injection nozzles.

[0022] As a further improvement of the present invention, the flow dividing manifold is in a circular shape, and the flow dividing manifold is connected to the main pipeline through a plurality of flow dividing branches, and the flow dividing manifold is also connected to a plurality of electrically controlled injection nozzles through a plurality of flow dividing branches;

[0023] A plurality of electrically controlled injection nozzles are arranged symmetrically about the central axis of the main pipeline.

[0024] As a further improvement of the present invention, the cabling machine cage includes a distribution plate, which is sleeved on the main pipe of the injection system; multiple cable core elements pass through the cabling machine cage into the distribution plate below the diversion manifold for cable stranding.

[0025] As a further improvement of the present invention, the spraying system includes a paint pipeline and multiple linear nozzles, the multiple linear nozzles are all connected to the paint pipeline, the multiple linear nozzles are all symmetrically arranged with respect to the central axis of the cable core, and are all placed tangent to four sides.

[0026] In a second aspect, the present invention provides a method for producing a cold chemical foaming cable core filling, based on the cold chemical foaming cable core filling production device, comprising the following steps:

[0027] The cold foaming device generates foaming material, which is then injected into the gaps of the cable core through the injection system manifold. During the foaming molding time, the shaping mold is used to remove the foaming filling protrusions and shape the surface of the cable core components.

[0028] The spraying system evenly sprays a layer of UV curing material on the surface of the cable core after foaming, filling and shaping, and the UV curing material is cured by the UV curing pipeline.

[0029] As a further improvement of the present invention, the spraying thickness of the ultraviolet curing material is 0.15-0.25 mm.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The present invention provides a cold chemical foaming cable core filling device, which includes a cold foaming device, a rotary joint, an injection system, a shaping and finalizing mold, a spraying system, and an ultraviolet light curing pipeline. By adding a cold foaming device and a rotary joint to the tail end of the cable cabling equipment, the injection system is used to send the material from the center of the main shaft tube of the cabling equipment to the periphery of the cable distribution disk of the cabling machine. During the process of twisting the cable core elements to form a cable core, the electrically controlled injection nozzle is aligned with the gap between the cable cores. The foaming material quickly completes self-foaming after injection, and during this period, the cable core is pulled through the shaping and finalizing mold to tighten and shape the cable core and the foaming material. The cable core that has been rounded is sprayed with ultraviolet curing material on the surface through the spraying system, and then irradiated and cured through the ultraviolet light curing pipeline to form a protective layer. The device can improve the production efficiency and quality of cable core cabling. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall system of the cold foaming device of the present invention;

[0033] Among them, 1. Cold foaming device; 2. Rotary joint; 3. Injection system; 4. Shaping mold; 5. Spraying system; 6. UV curing pipeline; 7. Cabling machine cage; 8. Cabling core;

[0034] Figure 2 is a schematic diagram of a rotary joint;

[0035] Among them, 21, rotating head (the figure is a half-section diagram); 211, rotating head front inner cavity; 212, rotating head tail cavity; 22, stationary core; 221, stationary core body; 222, stationary core tail;

[0036] Figure 3 is a schematic diagram of the injection system;

[0037] Among them, 31, main pipeline; 32, branch manifold; 33, electronically controlled injection nozzle;

[0038] Figure 4 It is the schematic diagram of the spraying system;

[0039] Among them, 51, paint pipeline; 52, linear nozzle. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] like Figure 1As shown, the purpose of the present invention is to provide a cold chemical foaming cable core filling device, comprising a cold foaming device 1, a rotary joint 2, a cabling machine cage 7, an injection system 3, a shaping and shaping mold 4, a spraying system 5, and an ultraviolet light curing pipeline 6; the cold foaming device 1, the rotary joint 2, the cabling machine cage 7, the injection system 3, the shaping and shaping mold 4, the spraying system 5, and the ultraviolet light curing pipeline 6 are connected in sequence.

[0042] Among them, the cold foaming device 1 is used to produce foaming material; the rotary joint 2 adopts a rotary connection device to prevent backflow and overflow; the cabling machine cage 7 is used to cable and twist multiple cable core elements; the injection system 3 is connected to the cold foaming device 1 through the rotary joint 2, and the injection system 3 has a manifold branch, which is used to align the gap of the cable core 8 and inject the foaming material for filling; the shaping and shaping mold 4 is used to shape the outer diameter of the cable core 8 after foaming and filling; the spraying system 5 is used to spray the ultraviolet light curing material on the cable core 8 after shaping; the ultraviolet light curing pipeline 6 is used to irradiate and cure the ultraviolet light curing material to form a protective layer.

[0043] The working process of the present invention is specifically as follows:

[0044] First, the cold foaming device 1 mixes binary cold foaming materials to produce foaming materials, which enter the main line 31 through the rotary joint 2 and are branched to the electronically controlled injection nozzle 33 through the branch manifold 32. The system can accurately control the injection amount of the foaming material according to the small pressure pump in the cold foaming device 1 and the electronically controlled injection nozzle 33 in real time.

[0045] Secondly, multiple cable core components enter the distribution disk below the diversion manifold 32 through the cabling machine cage 7 for cable stranding, and the electric-controlled injection nozzle 33 is aimed at the gap of the cable core 8 for foaming injection. The electric-controlled injection nozzle 33 of the multi-channel injection system 3 automatically controls the amount of foaming glue linearly with the linear speed of the equipment. The position of the electric-controlled injection nozzle 33 can be flexibly configured and moved according to the gap of the cable components. The electric-controlled injection nozzle 33 can be adjusted or replaced to facilitate foaming and filling inside or outside the cable core 8. Afterwards, the outer diameter of the cable core 8 after foaming and filling is tightened and shaped by the shaping mold 4.

[0046] After the cable core 8 is shaped after foaming and filling, the spraying system 5 sprays a UV curing material with a thickness of 0.15-0.25 mm on its surface. The UV curing material can be a liquid UV light-sensitive cross-linking material, and then enters the UV curing pipeline 6 for surface curing.

[0047] As an example, the liquid UV-sensitive cross-linking material used in the point foaming process of optical cables is mainly based on polyolefins (such as polyethylene) and mixed with an appropriate amount of photoinitiator. Under the irradiation of ultraviolet light, this type of material can induce the polyolefin molecules to produce free radicals after the photoinitiator absorbs the ultraviolet energy of a specific wavelength, and then a series of rapid polymerization reactions occur to generate cross-linked polyolefins with a three-dimensional network structure. This cross-linking structure gives the material excellent high temperature resistance, solvent resistance, electrical properties and enhanced mechanical properties.

[0048] Specifically, liquid UV-sensitive cross-linking materials include components: Polyolefin base resin: This is the main component of the material, which provides the basic physical and chemical properties of the material. In the point foaming molding of optical cables, commonly used polyolefin base resins include polyethylene, etc. Photoinitiator: The photoinitiator is the key to the UV cross-linking reaction. It can absorb UV light energy and convert it into chemical energy, thereby initiating the cross-linking reaction of polyolefin molecules. Foaming agent: In the process of point foaming molding of optical cables, the foaming agent is the key to forming the foam structure. By adding an appropriate amount of foaming agent and decomposing it under specific conditions to produce gas, bubbles are formed inside the material. Other additives: In addition to the above main components, liquid UV-sensitive cross-linking materials may also include some other additives, such as stabilizers, antioxidants, plasticizers, etc. The selection and dosage of these additives will be adjusted according to the specific application requirements and material performance requirements.

[0049] The cold foaming device 1 of the present invention is a foaming material intermediate mixing and preparing device, which can mix and proportion polyether polyol, isocyanate or other types of cold foaming materials.

[0050] like Figure 2 As shown, the rotary joint 2 includes a rotary head 21 and a stationary core 22, wherein the rotary head 21 has a rotary head front inner cavity 211 and a rotary head tail cavity 212, the inner wall of the rotary head front inner cavity 211 is engraved with physical patterns, such as positive patterns, and the rotary head tail cavity 212 is filled with oily fillers; the stationary core 22 has a stationary core body 221 and a stationary core tail 222; the stationary core body 221 has the same structure as the rotary head front inner cavity 211 and is smoothly connected, and the stationary core tail 222 has the same structure as the rotary head tail cavity 212 and is tightly fitted.

[0051] As an example, the structural matching principle of the rotary joint 2 is as follows: the rotating head 21 and the stationary core 22 achieve the functions of rotation and stillness through precise matching. The front inner cavity 211 of the rotating head has the same structure as the stationary core body 221 and is smoothly matched to ensure that no excessive friction resistance is generated during the rotation process. The rotating head tail cavity 212 has the same structure as the stationary core tail 222 and is tightly matched. The gap between the disc and the rotating head tail cavity 212 is filled with oily fillers to further reduce friction and provide lubrication.

[0052] When the external power drives the rotating head 21 to rotate, the stationary core body 221 rotates accordingly due to the close fit between the stationary core body 221 and the rotating head front inner cavity 211. At the same time, due to the close fit between the stationary core tail 222 and the rotating head tail cavity 212 and the lubrication of the oily filler, the rotation can be carried out smoothly without excessive wear or leakage.

[0053] More specifically, see Figure 2 The stationary core body 221 is a conical structure, and the tip of the conical structure has a feed port, which is connected to the cold foaming device 1. The stationary core tail 222 includes a rotating pipeline, and a plurality of spaced discs are arranged outside the rotating pipeline, and the rotating pipeline is connected to the feed port; the oily filler is filled in the gap between the disc and the rotating head and tail cavity 212.

[0054] As an example, the tip of the stationary core body 221 of a conical structure has a feed port (foaming material inlet), which is connected to the cold foaming device 1. The feed port is connected to the rotating pipeline through the channel inside the stationary core body 221 to realize the transmission of the foaming material. During the rotation process, the foaming material can be continuously transmitted to the required position through the stationary core body 221 and the rotating pipeline. The inner wall of the front inner cavity 211 of the rotating head is engraved with physical patterns. This design may help to increase the sealing performance and prevent the foaming material from leaking. The oily filler not only has a lubricating effect, but also forms a protective film during the rotation process to reduce wear and extend the service life. The stationary core tail 222 includes a rotating pipeline, and a plurality of spaced discs are arranged outside the rotating pipeline. These discs may play a role in supporting and stabilizing the rotating pipeline, and also help to reduce vibration and noise during rotation.

[0055] Furthermore, in the above structure, the rotary joint 2 is a device that connects two relatively rotating pipes in a sealed state; the whole is divided into a rotating head 21 and a stationary core 22, wherein the interior of the front inner cavity 211 of the rotating head is laser micro-engraved with physical patterns, and the physical liquid flow pressure difference is used to prevent the liquid from flowing back, and the front inner cavity 211 of the rotating head is smoothly connected with the stationary core body 221; the rotating head tail cavity 212 is filled with a high-viscosity oily filler for sealing, and the rotating head tail cavity 212 and the stationary core tail 222 are tightly matched to prevent the foaming liquid from flowing back or leaking.

[0056] Furthermore, a rotating connection device is used to prevent backflow and overflow. The front inner cavity 211 of the rotating head adopts laser micro-engraving to form physical patterns to prevent liquid backflow. The front inner cavity 211 of the rotating head is smoothly connected with the stationary core body 221. The tail cavity 212 of the rotating head is filled with high-viscosity oily material, which fits tightly with the stationary core tail 222 to prevent liquid backflow.

[0057] The physical texture of laser micro-carving and the close fit between the rotating head 21 and the stationary core 22 are also key measures to prevent liquid backflow. These designs can complement each other with high-viscosity oily materials to jointly improve the sealing performance and reliability of the rotating connection device.

[0058] For example, when selecting a high-viscosity oily material to prevent liquid backflow, the viscosity, wear resistance, corrosion resistance, high temperature resistance and sealing performance of the material need to be considered. Common high-viscosity oily materials suitable for this scenario can be dimethyl silicone oil, synthetic lubricating oil, high-temperature grease or polytetrafluoroethylene-based grease.

[0059] like Figure 3 As shown, the manifold branch includes a flow dividing manifold 32 and an electrically controlled injection nozzle 33; one end of the main line 31 is connected to the rotary joint 2, and the other end is connected to the flow dividing manifold 32, and the flow dividing manifold 32 is arranged outside the axis of the main line 31, and the flow dividing manifold 32 branches to multiple electrically controlled injection nozzles 33. The flow dividing manifold 32 is annular, and the flow dividing manifold 32 is connected to the main line 31 through multiple flow dividing branches, and the flow dividing manifold 32 is also connected to multiple electrically controlled injection nozzles 33 through multiple branch branches; the multiple electrically controlled injection nozzles 33 are arranged symmetrically about the axis of the main line 31.

[0060] The main line 31 is the backbone of the system, and one end is connected to the rotary joint 2 for receiving the foaming material from the rotary joint 2. The branch manifold 32 is annular and is arranged outside the axis of the main line 31. It is connected to the main line 31 through multiple branch pipes. This layout allows the foaming material to flow evenly from the main line 31 to the branch manifold 32. The electric-controlled injection nozzles 33 are correspondingly connected to the branch manifold 32 through multiple branch pipes, and the multiple electric-controlled injection nozzles 33 are arranged symmetrically about the center of the axis of the main line 31. This arrangement ensures that the foaming material can be evenly distributed to each electric-controlled injection nozzle 33, achieving precise injection or spraying.

[0061] Further, when the rotary joint 2 receives the foaming material from the cold foaming device 1 or other sources, the foaming material first enters the main line 31. In the main line 31, the foaming material is directed to the branch manifold 32. Since the branch manifold 32 is annular and is connected to the main line 31 through multiple branch branches, the foaming material can be evenly distributed in the branch manifold 32. Then, the foaming material is transported to each electrically controlled injection nozzle 33 through the branch branch. Since the electrically controlled injection nozzle 33 is arranged symmetrically about the axis of the main line 31, the foaming material can be evenly distributed to each electrically controlled injection nozzle 33, ensuring the uniformity and accuracy of injection or spraying. The electrically controlled injection nozzle 33 is usually equipped with a solenoid valve or other control device for accurately controlling the injection amount, injection speed and injection time of the foaming material. According to the preset program or instruction, the electrically controlled injection nozzle 33 can realize the precise injection or spraying of the foaming material. The manifold branch of the entire injection system 3 requires close cooperation and coordination between the various components. For example, the rotary joint 2 needs to ensure stable transmission of the foaming material and smooth rotational movement; the diversion manifold 32 needs to ensure uniform distribution of the foaming material; and the electronically controlled injection nozzle 33 needs to ensure precise injection or spraying of the foaming material.

[0062] In the above structure, the injection system 3 is an electrically controlled injection nozzle 33 with a manifold branch, and the position of the electrically controlled injection nozzle 33 can be manually adjusted according to the size of the cable core 8; the shaping mold 4 is made of hard metal, and the smooth inner cavity shapes the outer diameter of the cable core 8 after foaming and filling; the spraying system 5 is an X and Y axial spray gun for spraying ultraviolet light curing materials, and the spraying thickness can be electrically adjusted.

[0063] Further, if Figure 1 As shown, the cabling machine cage 7 includes a distribution plate, which is sleeved on the main pipe 31 of the injection system 3; multiple cable core components pass through the cabling machine cage 7 and enter the distribution plate below the diversion manifold 32 for cable stranding. After the cable stranding, the foaming process is performed.

[0064] like Figure 4 As shown, the spraying system 5 includes a paint pipeline 51 and a linear nozzle 52. The multiple linear nozzles 52 are connected to the paint pipeline 51. The multiple linear nozzles 52 are symmetrically arranged with respect to the axis of the cable core 8 and are placed tangent to four sides.

[0065] In the above structure, the paint pipeline 51 in the spraying system 5 serves as the backbone of the system, responsible for transporting the paint from the source to each linear nozzle 52. Multiple linear nozzles 52 are connected to the paint pipeline 51 to ensure that the paint can be evenly distributed to each linear nozzle 52. The design of the linear nozzle 52 enables the paint to be sprayed in a linear manner, and the multiple linear nozzles 52 are symmetrically arranged with respect to the axis of the cable core 8, and are placed tangent to the four sides. This arrangement ensures that the paint can be evenly coated on the outer surface of the cable core 8 to form a uniform coating.

[0066] When the paint is transported from the paint pipeline 51 to the linear nozzle 52, the linear nozzle 52 will spray according to the preset spraying parameters (such as spraying speed, spraying amount, etc.). Due to the four-sided tangent placement of the linear nozzle 52, the paint can be evenly covered on the outer surface of the cable core 8 to form a continuous coating. During the spraying process, the supply amount and spraying speed of the paint can be adjusted as needed to meet the production requirements of different products.

[0067] As an example, the UV curing pipeline 6 is an UV irradiation system that can automatically adjust the power, and the irradiation power can be automatically adjusted according to the production speed and the spraying thickness. The spraying system 5 adopts a linear nozzle 52, which is placed on four sides of the tangent line, and can evenly coat the surface of the cable core 8. The UV curing pipeline 6 is an UV irradiation system that can automatically adjust the power. The system can automatically adjust the irradiation power according to the production speed and the spraying thickness to ensure that the coating can be cured evenly and quickly. After the spraying is completed, the UV curing pipeline 6 will emit ultraviolet light to irradiate the coating. The ultraviolet light reacts with the resin or other curing agent in the coating to make it cure rapidly. Since the irradiation power can be automatically adjusted according to the production speed and the spraying thickness, it can be ensured that the coating can achieve an ideal curing effect under different conditions.

[0068] The spraying system 5 and the UV curing pipeline 6 of the present invention are closely matched and coordinated. After the spraying system 5 completes the spraying of the coating, the UV curing pipeline 6 should immediately start the radiation curing process. At the same time, the system also needs to consider the influence of factors such as production speed and spraying thickness on the curing effect, and take corresponding measures to optimize and adjust.

[0069] The present invention also provides a method for producing a cold chemical foaming cable core filling device, which comprises the following steps based on the above-mentioned cold chemical foaming cable core filling production device:

[0070] S1, a foaming material is generated by a cold foaming device 1, and the foaming material is injected into the gap of the cable core 8 through the injection system 3 manifold, and the foaming filling protrusions are quickly removed and the surface of the cable core element is shaped through the shaping mold 4 within the foaming molding time;

[0071] S2, a foaming material is generated by a cold foaming device 1, which is branched from a manifold to an electrically controlled injection nozzle 33 through a main pipe 31 of an injection system 3, and the foaming material is injected into the gap of a cable core 8 of the cable. The foaming material quickly passes through a shaping mold 4 within the foaming molding time to complete the removal of the foaming filling protrusions and the shaping of the surface of the cable core component; after the foaming and curing, a spraying system 5 evenly sprays a layer of ultraviolet curing material on the surface of the cable core component after the foaming, filling and shaping, and the ultraviolet curing pipeline 6 cures the ultraviolet curing material on the surface.

[0072] The cold chemical foaming cable core filling device production method provided by the present invention, first, step S1 is the production and preliminary injection process of the foaming material. The required foaming material is generated by the cold foaming device 1. It is then introduced into the manifold branch of the injection system 3, and is accurately injected into each gap of the cable core 8. During the critical time period of the foaming material molding, the cable core needs to be quickly processed by the shaping and finalizing mold 4. This step not only removes the filling protrusions that may be generated during the foaming process, but also ensures the neatness and standardization of the appearance of the cable core element.

[0073] Next, step S2 is the injection and subsequent processing of the foaming material. Similarly, the cold foaming device 1 produces the foaming material, but this time the material is transmitted through the main line 31 of the injection system 3. The main line 31 guides the material to the manifold branch and further diverts it to the electrically controlled injection nozzle 33. The electrically controlled injection nozzle 33 can more accurately control the injection position and amount of the foaming material to ensure that they can be evenly filled into the gaps of the cable core 8. Similar to step S1, during the foaming molding, the cable core needs to quickly pass through the shaping mold 4 to complete the removal of the filling protrusions and surface shaping.

[0074] In addition, step S2 also introduces a post-foaming curing treatment step. Once the foaming material is cured, the spraying system 5 will evenly spray a layer of UV curing material on the outer surface of the cable core element. This layer of material not only provides an additional layer of protection, but also enhances the durability and stability of the cable core. Next, the UV curing pipeline 6 will cure this layer of material to ensure that it is tightly attached to the surface of the cable core.

[0075] The method of the present invention achieves efficient and high-quality filling and protection of the cable core by precisely controlling the production, injection and curing process of the foaming material and introducing ultraviolet curing technology. This method not only improves the production efficiency and product quality of the cable, but also provides a reliable guarantee for the long-term use of the cable.

[0076] Through the above process, the time for replacing, replenishing and adjusting the shape and position of multiple tedious solid filling ropes, filling blocks and filling strips in the cable cabling process can be greatly reduced. Moreover, after the foaming injection, during the foaming increase period, the irregular gaps and vacancies existing in the multiple cable core components after cabling can be effectively filled by the foaming material; after the foaming filling molding, the ultraviolet light-sensitive cross-linking material is coated by the spraying system 5 and cross-linked and cured by the ultraviolet light curing system. The cured layer is waterproof and impact-resistant, and can also be used as a substitute for the cable core 8 tape, thereby reducing the waste of production preparation time caused by the replacement of the cable core component tape.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A cold chemical foaming cable core filling production device, characterized in that: It comprises a cold foaming device (1), a rotary joint (2), a cabling machine cage (7), an injection system (3), a shaping mold (4), a spraying system (5), and an ultraviolet light curing pipeline (6) which are connected in sequence; The cold foaming device (1) is used to produce foaming material; The rotary joint (2) adopts a rotary connection device that prevents backflow and overflow; The cabling machine cage (7) is used to perform cabling and stranding of a plurality of cable core elements to obtain a cabling cable core (8); The injection system (3) is connected to the cold foaming device (1) via a rotary joint (2), and the injection system (3) has a manifold branch, which is aligned with the gap of the cable core (8) and injects the foaming material for filling; The shaping and finalizing mold (4) is used to finalize the outer diameter of the cable core (8) after foaming and filling; The spraying system (5) is used to spray the ultraviolet light curing material on the cable core (8) after being shaped; The ultraviolet light curing pipeline (6) is used for irradiating and curing the ultraviolet light curing material to form a protective layer.

2. A cold chemical foaming cable core filling production device according to claim 1, characterized in that: The rotary joint (2) comprises a rotary head (21) and a stationary core (22), wherein the rotary head (21) comprises a rotary head front inner cavity (211) and a rotary head tail cavity (212), the inner wall of the rotary head front inner cavity (211) is engraved with physical patterns, and the rotary head tail cavity (212) is filled with an oily filler; the stationary core (22) comprises a stationary core body (221) and a stationary core tail (222); the stationary core body (221) and the rotary head front inner cavity (211) have the same structure and are smoothly connected, and the stationary core tail (222) and the rotary head tail cavity (212) have the same structure and are tightly matched.

3. A cold chemical foaming cable core filling production device according to claim 2, characterized in that: The stationary core body (221) is a conical structure, the tip of the conical structure has a feed inlet, and the feed inlet is connected to the cold foaming device (1).

4. A cold chemical foaming cable core filling production device according to claim 3, characterized in that: The stationary core tail (222) comprises a rotating pipeline, a plurality of spaced discs are arranged outside the rotating pipeline, and the rotating pipeline is connected to the feed port; the oily filler is filled in the gap between the disc and the rotating head and tail cavity (212).

5. A cold chemical foaming cable core filling production device according to claim 1, characterized in that: The manifold branch comprises a main line (31), a flow-dividing manifold (32), and an electrically controlled injection nozzle (33); one end of the main line (31) is connected to the rotary joint (2), and the other end is connected to the flow-dividing manifold (32), and the flow-dividing manifold (32) is arranged outside the axis of the main line (31), and the flow-dividing manifold (32) branches to a plurality of electrically controlled injection nozzles (33).

6. A cold chemical foaming cable core filling production device according to claim 5, characterized in that: The flow dividing manifold (32) is annular in shape, and is connected to the main pipeline (31) through a plurality of flow dividing branch pipes. The flow dividing manifold (32) is also connected to a plurality of electrically controlled injection nozzles (33) through a plurality of flow dividing branch pipes. The plurality of electrically controlled injection nozzles (33) are arranged symmetrically about the axis of the main pipe (31).

7. A cold chemical foaming cable core filling production device according to claim 6, characterized in that: The cabling machine cage (7) comprises a distribution plate, which is sleeved on the main pipeline (31) of the injection system (3); a plurality of cable core elements pass through the cabling machine cage (7) and enter the distribution plate below the diversion manifold (32) for cable stranding.

8. A cold chemical foaming cable core filling production device according to claim 1, characterized in that: The spraying system (5) comprises a coating pipeline (51) and a plurality of linear nozzles (52), wherein the plurality of linear nozzles (52) are all connected to the coating pipeline (51), and the plurality of linear nozzles (52) are all arranged symmetrically with respect to the axis of the cable core (8) and are all placed tangentially on four sides.

9. A method for producing cold chemical foaming cable core filling, based on a cold chemical foaming cable core filling production device according to any one of claims 1 to 8, characterized in that: The steps include: A foaming material is generated by a cold foaming device (1), and the foaming material is injected into the gaps of the cable core (8) through the injection system (3) manifold. During the foaming molding time, the foaming filling protrusions are removed and the surface of the cable core element is shaped by a shaping mold (4); The spraying system (5) evenly sprays a layer of ultraviolet curing material on the surface of the cable core (8) after foaming, filling and shaping, and the ultraviolet curing material is cured by the ultraviolet curing pipeline (6).

10. A cold chemical foaming cable core filling production method according to claim 9, characterized in that: The spraying thickness of the ultraviolet curing material is 0.15-0.25 mm.

Images