B1-level high-flame-retardant shielding network cable and manufacturing method thereof

Abstract

The invention relates to a B1-level high-flame-retardant shielding network cable. Comprising a first wire core, a first shielding layer wrapping the first wire core, a plurality of second wire cores arranged outside the first shielding layer at equal intervals in the circumferential direction of the first wire core, and a second shielding layer wrapping the second wire cores and forming a plurality of first shielding areas between the second shielding layer and the first shielding layer. The plurality of third wire cores are respectively arranged between two adjacent second wire cores; the third shielding layer wraps the plurality of third wire cores; a plurality of second shielding areas are formed between the third shielding layer and the second shielding layer; the protection layer wraps the third shielding layer; the invention further relates to a network cable manufacturing method which is used for manufacturing the B1-level high-flame-retardant shielding network cable and comprises a first wire combining process, a second wire combining process, an injection molding process and a rolling process. According to the multi-core network cable, the problems of unreasonable shielding layer structure, poor shielding effect, low production efficiency and high production cost of the existing multi-core network cable are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of network power facilities, and in particular to a B1-class highly flame-retardant shielded network cable and a manufacturing method thereof. Background Art

[0002] Network cable, also known as network cable or network connection cable, is a medium that connects one network device to another and is used to transmit information. It is a basic component of the network and is mainly used in the connection of analog or digital communication equipment in the integrated wiring system, the interconnection between HUB and servers, or the wiring connection of voice, telephone, and fax systems. In modern society, cable communication networks have become an indispensable part of people's lives. As a hub for human communication and an important tool for information exchange, cable communication networks often bear huge workloads and responsibilities.

[0003] The patent document with patent number CN104751991A discloses a cable and a production method thereof, which is applicable to the technical field of a cable, and discloses a cable, including a first sheath, a first shielding layer, a first cable core and a cable core coating layer, the first cable core includes a plurality of second cable cores, the second cable cores are mutually rotationally twisted, one of the second cable cores is arranged in the center, and the other second cable cores are evenly distributed around it, the cable core coating layer rotates and wraps around the first cable core obliquely in a clockwise direction, the first shielding layer is wrapped around the outer periphery of the cable core coating layer, and the first shielding layer, the first cable core and the cable core coating layer are all arranged inside the first sheath. The present invention provides a cable, wherein the second cable core wraps the second shielding layer around the outer periphery of the data cable, and wraps the grounding cable around the outer periphery of the shielding layer, which not only reduces the interference signal generated by the data cable, but also reduces the diameter of the second cable core, thereby reducing the diameter of the entire cable, so that the double shielding layers are separated from each other, avoiding the mutual influence of the shielding layers, and greatly improving the shielding effect.

[0004] However, in actual use, the inventors found that the shielding layer structure of the existing multi-core network cables is unreasonable. During the data transmission process of some multi-core network cables, signals of different frequencies in the multi-core cores always interfere with each other, and the shielding effect is poor, affecting the stability and accuracy of data transmission. During the production process of some multi-core network cables, it is necessary to wrap a shielding layer on each core and then combine multiple cores. The shielding layer winding process and winding length are long, which not only affects the production efficiency and has high material costs, but also requires more production equipment during automated one-time production, which occupies a large production space and has high equipment costs. Summary of the invention

[0005] The purpose of the present invention is to address the shortcomings of the prior art, by setting the second shielding layer as a special structure, improve the rationality of the coordination between multiple shielding layer structures, realize the shielding of each core, and achieve good shielding effect. In production, it is only necessary to wrap the first shielding layer, the second shielding layer and the third shielding layer in turn around the outside of the first core, the second core and the third core, and squeeze the second shielding layer to form a special structure during the wire closing process, thereby reducing the number of shielding layer windings. Thereby solving the problems of unreasonable shielding layer structure, poor shielding effect, low production efficiency and high production cost of existing multi-core network cables.

[0006] In view of the above technical problems, the technical solution adopted is as follows: a B1-level highly flame-retardant shielded network cable, including: A first wire core, a first shielding layer wrapped around the outside of the first wire core, a plurality of second wire cores arranged outside the first shielding layer at equal intervals along the circumference of the first wire core, a second shielding layer wrapped around the outside of the plurality of second wire cores and forming a plurality of first shielding areas between the first shielding layer for respectively shielding the plurality of second wire cores, a plurality of third wire cores respectively arranged between two adjacent second wire cores, a third shielding layer wrapped around the outside of the plurality of third wire cores and forming a plurality of second shielding areas between the second shielding layer for respectively shielding the plurality of third wire cores, and a protective layer wrapped around the outside of the third shielding layer.

[0007] Preferably, the B1 grade high flame retardant shielded network cable also includes a plurality of reinforcing ribs respectively arranged between the adjacent second cores and the third cores and located outside the third shielding layer, and the plurality of reinforcing ribs press the third shielding layer to bend between the second cores and the third cores to form a bent portion.

[0008] Preferably, a plurality of limiting strips are formed on the inner side of the protective layer, and two limiting strips form a group and respectively limit the two sides of the reinforcing rib.

[0009] Preferably, anti-slip grooves are formed on the outer side of the protective layer at positions corresponding to the plurality of limit strips.

[0010] Preferably, the B1-level highly flame-retardant shielded network cable further comprises a flame-retardant material filling between the bending portion and the protective layer, and the flame-retardant material is magnesium hydroxide powder or aluminum hydroxide powder.

[0011] Preferably, the first shielding layer, the second shielding layer and the third shielding layer are all copper foil or aluminum foil, and the thickness of the three is 0.5mm-1mm.

[0012] The present application also provides a network cable manufacturing method for manufacturing the above-mentioned B1-level highly flame-retardant shielded network cable, comprising the following steps: Step 1: a first wire joining process, after the first shielding layer is wrapped around the outside of the first wire core, a plurality of the second wire cores are evenly spaced and attached to the outer wall of the first shielding layer; Step 2: a second wire joining process, after the second shielding layer is wrapped around the outside of a plurality of the second cores, a plurality of the third cores are evenly spaced and attached to the outer wall of the second shielding layer, and the third cores squeeze the second shielding layer and bend between two adjacent second cores until the second shielding layer is attached to the first shielding layer to form a plurality of the first shielding areas; Step 3: Injection molding process, wrapping the third shielding layer around the outside of the plurality of third cores, and after the third shielding layer is attached to the second shielding layer to form a plurality of the second shielding areas, injection molding the protective layer outside the third shielding layer; Step 4: a winding process, wherein the protective layer is cooled and solidified, so that the B1-level highly flame-retardant shielded network cable is formed, and then the B1-level highly flame-retardant shielded network cable is rolled into a bundle.

[0013] Preferably, in step three, before injection molding the protective layer, a plurality of reinforcing ribs are evenly spaced on the outer wall of the third shielding layer, and the plurality of reinforcing ribs press the third shielding layer to bend between adjacent second cores and third cores to form a plurality of bent portions, and flame retardant material is filled in the bent portions.

[0014] Preferably, in step four, before the protective layer is cooled and solidified, a plurality of anti-slip grooves are press-formed on the outer wall of the protective layer, and a plurality of limiting strips for limiting the reinforcing ribs are press-formed at corresponding positions on the inner wall of the protective layer.

[0015] Preferably, the widths of the first shielding layer, the second shielding layer and the third shielding layer are all 1.5 cm-2.5 cm, and the winding speeds are all 1000-1500 r / min, and the transmission speed of the first core is 300-500 cm / min.

[0016] Beneficial effects of the present invention: (1) In the present invention, the second shielding layer is set as a special structure to improve the rationality of the coordination between the multiple shielding layer structures, so that a first shielding area for shielding the second core is formed between the first shielding layer and the second shielding layer, and a second shielding area for shielding the third core is formed between the third shielding layer and the second shielding layer, so as to achieve shielding of each core, with good shielding effect. In production, it is only necessary to wind the first shielding layer, the second shielding layer and the third shielding layer in turn around the outside of the first core, the second core and the third core, and squeeze the second shielding layer in the process of closing the wires to form a special structure, thereby reducing the production difficulty, reducing the number of windings of the shielding layer, improving the production efficiency and reducing the production cost. (2) In the present invention, while the overall structural strength is improved by providing reinforcing ribs, the reinforcing ribs squeeze the third shielding layer supported between the adjacent second core and the third core to bend inward to form a curved portion, thereby reducing the probability of the originally supported third shielding layer being damaged during the process of being squeezed or bumped by the protective layer, thereby avoiding affecting the overall shielding effect. In addition, the formation of the curved portion facilitates the filling and attachment of flame-retardant material between the third shielding layer and the protective layer, thereby improving the flame-retardant effect and providing higher safety during use. (3) In the present invention, the anti-skid groove is provided to improve the anti-skid effect of the outer surface of the protective layer, which is convenient for winding during production and installation and fixing during use. In addition, during the process of pressing and forming the anti-skid groove, the limiting strips for limiting the two sides of the reinforcing rib are simultaneously formed, which reduces the production difficulty and facilitates production and processing. At the same time, the third wire core and the second wire core are indirectly limited, thereby improving the stability of the internal structure and the stability of the shielding structure. In summary, the B1-level highly flame-retardant shielded network cable has a reasonable shielding layer structure, good shielding effect, high production efficiency, and low production cost, and is particularly suitable for the field of network power facility technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a B1-level highly flame-retardant shielded network cable provided by the present invention.

[0019] Figure 2 A cross-sectional view of a B1-grade highly flame-retardant shielded network cable provided by the present invention.

[0020] Figure 3 The present invention provides Figure 2 A partial enlarged view of point A in the middle.

[0021] Figure 4 A schematic diagram of the production process of a B1-grade highly flame-retardant shielded network cable provided by the present invention.

[0022] Figure 5 A three-dimensional diagram of a network cable production device provided by the present invention.

[0023] Figure 6 This is a schematic structural diagram of the first winding assembly and the first wire combining assembly provided by the present invention.

[0024] Figure 7A schematic structural diagram of a second winding assembly, a second wire-closing assembly, a third winding assembly and a third wire-closing assembly provided by the present invention.

[0025] Figure 8 The present invention provides Figure 7 A partial enlarged view of point B in the middle.

[0026] Fig. 9 A state diagram of the first rotating plate and the second rotating plate supporting the shielding layer roll provided by the present invention.

[0027] Fig.10 This is a schematic structural diagram of the powder transfer assembly provided by the present invention.

[0028] Fig.11 A three-dimensional cross-sectional view of the powder passing assembly provided by the present invention.

[0029] Fig.12 The present invention provides Fig.11 A partial enlarged view of point C in the middle.

[0030] Fig.13 A schematic structural diagram of the pressing assembly provided by the present invention.

[0031] Fig.14 This is a schematic structural diagram of the winding mechanism provided by the present invention.

[0032] Fig.15 The present invention provides Fig.14 A partial enlarged view of point D in the middle. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0034] Embodiment 1 like Figure 1-Figure 2 As shown, a B1-level highly flame-retardant shielded network cable includes: A first wire core 11, a first shielding layer 12 wrapped around the outside of the first wire core 11, a plurality of second wire cores 13 arranged at equal intervals along the circumference of the first wire core 11 outside the first shielding layer 12, a second shielding layer 14 wrapped around the outside of the plurality of second wire cores 13 and forming a plurality of first shielding areas 121 between the first shielding layer 12 and respectively used to shield the plurality of second wire cores 13, a plurality of third wire cores 15 respectively arranged between two adjacent second wire cores 13, a third shielding layer 16 wrapped around the outside of the plurality of third wire cores 15 and forming a plurality of second shielding areas 141 between the second shielding layer and respectively used to shield the plurality of third wire cores 15, and a protective layer 17 wrapped around the outside of the third shielding layer 16.

[0035] In this embodiment, by setting the second shielding layer 14 as a special structure, the rationality of the coordination between the multiple shielding layer structures is improved, so that a first shielding area 121 for shielding the second core 13 is formed between the first shielding layer 12 and the second shielding layer 14, and a second shielding area 141 for shielding the third core 15 is formed between the third shielding layer 16 and the second shielding layer 14, thereby shielding each core with good shielding effect. During production, it is only necessary to wind the first shielding layer 12, the second shielding layer 14 and the third shielding layer 16 around the outside of the first core 11, the second core 13 and the third core 15 in turn, and extrude the second shielding layer 14 to form a special structure during the process of closing the wires, thereby reducing the production difficulty, reducing the number of windings of the shielding layer, improving the production efficiency and reducing the production cost.

[0036] It should be noted that the protective layer 17 is made of PVC material or flame-retardant PC material, and has good protectiveness and flame retardancy.

[0037] Further, if Figure 1-Figure 3 As shown, the B1 grade high flame retardant shielded network cable also includes a plurality of reinforcing ribs 18 respectively arranged between adjacent second cores 13 and third cores 15 and located outside the third shielding layer 16, and the plurality of reinforcing ribs 18 press the third shielding layer 16 to bend between the second cores 13 and the third cores 15 to form a bending portion 161.

[0038] In this embodiment, while the overall structural strength is improved by providing reinforcing ribs 18, the reinforcing ribs 18 squeeze the third shielding layer 16 supported between the adjacent second core 13 and the third core 15 to bend inward to form a bent portion 161, thereby reducing the probability of the originally supported third shielding layer 16 being damaged during the squeezing or collision of the protective layer 17, thereby avoiding affecting the overall shielding effect.

[0039] It should be noted that the reinforcing ribs 18 are made of steel strips or fiber strips, have high strength and corrosion resistance, and have good reinforcing effects.

[0040] Further, if Figure 1-Figure 3 As shown, a plurality of limiting strips 171 are formed on the inner side of the protective layer 17 , and two limiting strips 171 form a group and respectively limit the two sides of the reinforcing rib 18 .

[0041] In this embodiment, the limiting strips 171 are provided to limit the two sides of the reinforcing rib 18, thereby indirectly limiting the third core 15 and the second core 13, thereby improving the stability of the internal structure and the stability of the shielding structure.

[0042] Furthermore, as shown in the figure, anti-slip grooves 172 are formed on the outer side of the protective layer 17 at positions corresponding to the plurality of limiting strips 171 .

[0043] In this embodiment, by setting the anti-skid groove 172 on the outer side of the protective layer 17 at the position of the limiting strip 171, not only the external anti-skid effect is improved, which is convenient for rolling up during production and installation and fixation during use, but also the limiting strip 171 is formed synchronously during the pressing and forming process of the anti-skid groove 172, thereby reducing the production difficulty and facilitating production and processing.

[0044] Further, if Figure 2-Figure 3 As shown, the B1-level highly flame-retardant shielded network cable further includes a flame-retardant material 19 between the filling and bending portion 161 and the protective layer 17 , and the flame-retardant material 19 is magnesium hydroxide powder or aluminum hydroxide powder.

[0045] In this embodiment, by providing the flame retardant material 19 to fill between the bent portion 161 and the protective layer 17 , the flame retardant effect is improved, and the safety during use is higher.

[0046] Further, if Figure 1-Figure 2 As shown, the first shielding layer 12, the second shielding layer 14 and the third shielding layer 16 are all made of copper foil or aluminum foil, and the thickness of the three is 0.5 mm-1 mm.

[0047] Embodiment 2 like Figure 1-Figure 5 As shown, a network cable manufacturing method is used to manufacture the above-mentioned B1-level high flame retardant shielded network cable, comprising the following steps: Step 1: a first wire joining process, after the first shielding layer 12 is wrapped around the outside of the first wire core 11, a plurality of second wire cores 13 are evenly spaced and attached to the outer wall of the first shielding layer 12; Step 2: a second wire joining process, after the second shielding layer 14 is wrapped around the outside of the plurality of second cores 13, a plurality of third cores 15 are evenly spaced and attached to the outer wall of the second shielding layer 14, and the third cores 15 squeeze the second shielding layer 14 and bend between two adjacent second cores 13 until the second shielding layer 14 is attached to the first shielding layer 12 to form a plurality of first shielding areas 121; Step 3: Injection molding process, wrapping the third shielding layer 16 around the outside of the plurality of third cores 15, and after the third shielding layer 16 is attached to the second shielding layer 14 to form a plurality of second shielding areas 141, a protective layer 17 is injection molded outside the third shielding layer 16; Step 4: a winding process, in which the protective layer 17 is cooled and solidified, so that the B1-class highly flame-retardant shielded network cable is formed, and then the B1-class highly flame-retardant shielded network cable is rolled into a bundle.

[0048] Further, if Figure 4-Figure 5As shown, in step three, before the protective layer 17 is injected, a plurality of reinforcing ribs 18 are evenly spaced on the outer wall of the third shielding layer 16, and the plurality of reinforcing ribs 18 press the third shielding layer 16 to bend between the adjacent second core 13 and the third core 15 to form a plurality of bending portions 161, and flame retardant material 19 is filled in the bending portions 161.

[0049] Further, if Figure 4-Figure 5 As shown, in step four, before the protective layer 17 cools down and solidifies, a plurality of anti-slip grooves 172 are press-formed on the outer wall of the protective layer 17 and a plurality of limiting strips 171 for limiting the reinforcing ribs 18 are press-formed at corresponding positions on the inner wall of the protective layer 17 .

[0050] Further, if Figure 4-Figure 5 As shown, the widths of the first shielding layer 12, the second shielding layer 14 and the third shielding layer 16 are all 1.5 cm-2.5 cm and the winding speeds are all 1000-1500 r / min, and the transmission speed of the first core 11 is 300-500 cm / min.

[0051] In this embodiment, by setting the first shielding layer 12, the second shielding layer 14 and the third shielding layer 16 of specific widths, and assisting with specific production winding speeds and conveying speeds, production continuity is ensured while ensuring production efficiency and the accuracy and stability of the winding of the protective layer 17.

[0052] Embodiment 3 like Figure 4-Figure 5 As shown, a network cable manufacturing device is used to manufacture the above-mentioned B1 grade high flame retardant shielded network cable, including: A frame 2, a first wire-closing mechanism 3, a second wire-closing mechanism 4, an injection molding mechanism 5 and a winding mechanism 6 which are sequentially arranged on the frame 2 along the production direction, the first wire-closing mechanism 3 is used for assembling and manufacturing the first shielding layer 12 and multiple second cores 13 with the first core 11, the second wire-closing mechanism 4 is used for assembling and manufacturing the second shielding layer 14 and the third core 15 with the second core 13, the first wire-closing mechanism 3 is used for assembling and manufacturing the third shielding layer 16, the reinforcing ribs 18 and the protective layer 17 with the third core 15 to form a Class B1 high flame retardant shielded network cable, and the winding mechanism 6 is used to roll the formed Class B1 high flame retardant shielded network cable into bundles.

[0053] In this embodiment, by setting the first wire closing mechanism 3, the second wire closing mechanism 4, the injection molding mechanism 5 and the winding mechanism 6, the first wire closing process, the second wire closing process, the injection molding process and the winding process are performed at one time, thereby realizing the automated molding and production of B1 grade high flame retardant shielded network cable.

[0054] In detail, during production, the first wire-closing mechanism 3 first winds the first shielding layer 12 on the outside of the first wire core 11, and then fits the plurality of second wire cores 13 on the outer wall of the first shielding layer 12 at equal intervals; then the second wire-closing mechanism 4 winds the second shielding layer 14 on the outside of the plurality of second wire cores 13, and then fits the plurality of third wire cores 15 on the outer wall of the second shielding layer 14 at equal intervals, and the third wire core 15 squeezes the second shielding layer 14 and bends between two adjacent second wire cores 13 until the second shielding layer 14 fits the first shielding layer 12 to form a plurality of first shielding areas 121; then the injection molding mechanism 5 winds the third wire core 15 on the outside of the plurality of third wire cores 15 There are three shielding layers 16, and a plurality of reinforcing ribs 18 are evenly spaced on the outer wall of the third shielding layer 16 for pressing the third shielding layer 16 to bend inward to form a plurality of bending portions 161, and after the bending portions 161 are filled with flame retardant material 19, a protective layer 17 is injection molded on the outside of the third shielding layer 16; finally, the injection molding mechanism 5 cools and solidifies the protective layer 17, so that the third shielding layer 16 is squeezed and fixed to fit the second shielding layer 14 to form a plurality of second shielding areas 141, so that after the B1-level high flame retardant shielded network cable is formed, the winding mechanism 6 can provide traction transmission power for the first core 11 during production while winding the B1-level high flame retardant shielded network cable into a bundle.

[0055] Further, if Figure 5-Figure 6 As shown, the first wire closing mechanism 3 includes a first load-bearing shaft 31, a first winding assembly 32, a plurality of second load-bearing shafts 33 and a first wire closing assembly 34 which are sequentially arranged on the frame 2 along the production direction, and the first load-bearing shaft 31 is used to roll up and carry the first wire core 11, the first winding assembly 32 is used to wind the first shielding layer 12 on the outside of the first wire core 11, the plurality of second load-bearing shafts 33 are respectively used to roll up and carry the plurality of second wire cores 13, and the first wire closing assembly 34 is used to fit the plurality of second wire cores 13 on the outer wall of the first shielding layer 12 at equal intervals.

[0056] In this embodiment, after the first winding component 32 is arranged to cooperate with the first bearing shaft 31 to wrap the first shielding layer 12 outside the first wire core 11, the first wire closing component 34 is assisted by the cooperation of multiple second bearing shafts 33 to enable the multiple second wire cores 13 to be evenly spaced and attached to the outer wall of the first shielding layer 12.

[0057] Further, if Figure 6 as well as Fig. 9As shown, the first winding assembly 32 includes a first rotating plate 321 with one end rotatably set on the frame 2 and the other end for supporting the shielding layer roll, a first supporting hole 324 formed on the rotating axis of the first rotating plate 321, a first supporting frame 322 rotatably set on the first rotating plate 321, a first guide roller 323 rotatably set on the first supporting frame 322 and used for guiding the movement of the shielding layer, and a first elastic member arranged on the first rotating plate 321 and used to force the first supporting frame 322 to rotate toward the direction close to the shielding layer roll.

[0058] In this embodiment, by providing a first rotating plate 321 to support the shielding layer roll and cooperating with the first support frame 322, the first guide roller 323 and the first elastic member, it is convenient to tightly wind the shielding layer on the wire core, thereby improving the winding effect and winding stability.

[0059] In detail, when in use, the shielding layer roll is supported on the first rotating plate 321, and the shielding layer is wound around the first guide roller 323 and then wound on the wire core. Under the action of the first elastic member, the first guide roller 323 rotates with the first support frame 322 to support and tighten the shielding layer. Then the first rotating plate 321 is rotated to tighten the shielding layer around the outer periphery of the wire core supported in the first support hole 324. When the shielding layer is rolled up and unwound, the first support frame 322 is able to rotate in the direction away from the shielding layer roll, thereby playing a certain buffering role and avoiding excessive traction during winding that may cause the shielding layer to break.

[0060] Further, if Figure 5 as well as Figure 7 As shown, the second wire closing mechanism 4 includes a second winding component 41, a plurality of third bearing shafts 42 and a second wire closing component 43 which are sequentially arranged on the frame 2 along the production direction, and the second winding component 41 is used to wind the second shielding layer 14 on the outside of the second wire core 13, and the plurality of third bearing shafts 42 are respectively used to wind up and carry the plurality of third wire cores 15, and the second wire closing component 43 is used to evenly space the plurality of third wire cores 15 on the outer wall of the second shielding layer 14 and squeeze the second shielding layer 14 to bend inward to fit the first shielding layer 12.

[0061] In this embodiment, after the second winding component 41 is set to wrap the second shielding layer 14 on the outside of the second wire core 13, and assisted by the second wire closing component 43 cooperating with multiple third bearing shafts 42, multiple third wire cores 15 can be evenly spaced and attached to the outer wall of the second shielding layer 14 and the second shielding layer 14 can be squeezed to bend inward and fit the first shielding layer 12.

[0062] Further, if Figure 5 as well as Figure 7As shown, the injection molding mechanism 5 includes a third winding component 51, a plurality of fourth bearing shafts 52, a third wire-joining component 53, a powder passing component 54, an extruder 55 and a pressing component 56 which are sequentially arranged on the frame 2 along the production direction, and the third winding component 51 is used to wind the third shielding layer 16 on the outside of the third wire core 15, and the plurality of fourth bearing shafts 52 are respectively used to wind up and carry a plurality of reinforcing ribs 18, the third wire-joining component 53 is used to evenly fit the plurality of reinforcing ribs 18 on the outer wall of the third shielding layer 16 and extrude the second shielding layer 14 to bend inwardly to form a curved portion 161, the powder passing component 54 is used to fill the curved portion 161 with flame retardant material 19, the machine is used to injection mold a protective layer 17 on the outside of the reinforcing rib 18, and the pressing component 56 is used to press an anti-slip groove 172 on the outer wall of the protective layer 17.

[0063] In this embodiment, after the third winding component 51 is arranged to wrap the third shielding layer 16 around the outside of the third wire core 15, and assisted by the third wire joining component 53 and the plurality of fourth bearing shafts 52, the plurality of reinforcing ribs 18 are evenly spaced and attached to the outer wall of the third shielding layer 16 and the third shielding layer 16 is squeezed inward to bend to form a curved portion 161, and then the powder passing component 54 and the extruder 55 are cooperated so that the flame retardant material 19 is filled between the protective layer 17 formed by injection molding and the curved portion 161, and then the pressing component 56 is cooperated to press the anti-slip groove 172 on the outer wall of the protective layer 17 and form a limit strip 171 on the inner wall of the protective layer 17.

[0064] It should be noted that the plurality of second bearing shafts 33, the plurality of third bearing shafts 42 and the plurality of fourth bearing shafts 52 are arranged at equal intervals along the circumference of the first wire core 11, so that the plurality of second wire cores 13, the plurality of third wire cores 15 and the plurality of reinforcing ribs 18 are transported at equal intervals around the first wire core 11; In addition, the extruder 55 used for injection molding the PVC material protective layer 17 or the PC material protective layer 17 and the installation method thereof are both prior art and will not be described in detail herein.

[0065] Further, if Figure 7-Figure 9 As shown, the second winding assembly 41 and the third winding assembly 51 both include a second rotating plate 411 with one end rotatably set on the frame 2 and the other end for supporting the shielding layer roll, a second supporting hole 416 formed on the rotating axis of the second rotating plate 411, a second supporting frame 412 rotatably set on the second rotating plate 411, a second guide roller 413 rotatably set on the second supporting frame 412 and used for guiding the movement of the shielding layer, a second elastic member arranged on the second rotating plate 411 and used for forcing the second supporting frame 412 to rotate toward the direction of the shielding layer roll, and a pressing rod 414 arranged on the frame 2 and used for pressing the shielding layer to bend inward after being wound.

[0066] In this embodiment, by providing a second rotating plate 411 to support the shielding layer roll and cooperating with a second support frame 412, a second guide roller 413 and a second elastic member, it is convenient to wrap the shielding layer tightly around the wire core, thereby improving the winding effect and winding stability. At the same time, with the assistance of a pressing rod 414, the shielding layer just wound around the wire core is pressed inward to bend, thereby avoiding the later winding being too tight and unable to bend inward.

[0067] In detail, when in use, the shielding layer roll is supported on the second rotating plate 411, and the shielding layer is passed around the second guide roller 413 and then wound on the wire core. Under the action of the second elastic member, the second guide roller 413 rotates with the second support frame 412 to support and tighten the shielding layer. Then the second rotating plate 411 is rotated to tighten the shielding layer around the outer periphery of the wire core supported in the second support hole 416. When the shielding layer is rolled up and unwound by the tape and the pressing rod 414 presses the shielding layer inward to bend, the second support frame 412 is able to rotate away from the shielding layer roll, thereby playing a certain buffering role and avoiding excessive traction during winding that may cause the shielding layer to break.

[0068] It should be noted that the number of the first support frame 322 and the second support frame 412 is preferably two, and the two first support frames 322 and the second support frames 412 are arranged opposite to each other, so that the supporting and tightening effect of the two first guide rollers 323 and the two second guide rollers 413 improves the tightness and stability of the shielding layer when it is wound.

[0069] In addition, one end of the pressing rod 414 close to the rotating plate is bent radially outward to form a guide portion 415, so that the wound shielding layer can enter the inner side between the plurality of pressing rods 414 for pressing and bending.

[0070] Further, if Figure 6-Figure 8 As shown, the first wire combining assembly 34, the second wire combining assembly 43 and the third wire combining assembly 53 all include a wire dividing plate 341 arranged on the frame 2, a positioning hole 342 arranged in the middle of the wire dividing plate 341, wire dividing holes 343 arranged on the wire dividing plate 341 at equal intervals along the circumference of the positioning hole 342, and a plurality of wire combining rollers 344 arranged on the frame 2 and used for guiding the wires in the corresponding wire dividing holes 343 for combining.

[0071] In this embodiment, after positioning the wire core produced in the previous process by setting the positioning hole 342, multiple wire dividing holes 343 and multiple wire combining rollers 344 are used to accurately combine multiple wire cores in this process around the wire core produced in the previous process.

[0072] It should be noted that the pressing rod 414 extends into the positioning hole 342 to achieve a positioning effect during the conveying process, thereby improving the production stability and yield rate.

[0073] Further, if Figure 10-12As shown, the powder passing assembly 54 includes a powder box 541 arranged on the frame 2 and used to hold the flame retardant material 19, a pressing plate 542 arranged in the powder box 541 for moving up and down, a third elastic member 543 arranged on the powder box 541 and used to force the pressing plate 542 to press the flame retardant material 19, a collecting box 544 arranged on the side of the powder box 541 close to the extruder 55 and used to collect the excess flame retardant material 19 attached to the curved portion 161, and a wire passing hole 545 formed on the powder box 541 and the collecting box 544.

[0074] In this embodiment, a pressing plate 542 is provided in cooperation with the third elastic member 543 to compact the flame retardant material 19 in the powder box 541, so that the flame retardant material 19 is more completely filled. At the same time, when the wire core moves through the wire hole 545 to fill the flame retardant material 19, the flame retardant material 19 is prevented from being lifted up and floating out, causing material waste and pollution to the production environment. The collection box 544 is used in cooperation with the wire hole 545 to scrape and collect the excess flame retardant material 19 attached to the bending portion 161, so as to avoid waste caused by material falling off.

[0075] It should be noted that a positioning groove 546 for positioning the reinforcing rib 18 is provided on the inner wall of the wire hole 545 to ensure the effect of positioning and transmission, and further improve the stability and yield rate of production.

[0076] Further, if Fig.13 As shown, the pressing assembly 56 includes a cooling box 564 arranged on the frame 2 and used for cooling the protective layer 17, a mounting frame 561 arranged on the cooling box 564, an embossing roller 562 rotatably arranged on the mounting frame 561 and used for embossing product information on the outer wall of the protective layer 17, and a plurality of pressing rollers 563 which are spaced apart and rotatably arranged on the mounting frame 561 and used for pressing and forming anti-skid grooves 172 on the outer wall of the protective layer 17.

[0077] In this embodiment, the mounting frame 561 is provided to mount the embossing roller 562 and the pressing roller 563 to emboss the product information on the outer wall of the protective layer 17 and to press the anti-skid groove 172, and then the cooling box 564 is used to cool and solidify the protective layer 17.

[0078] It should be noted that the cooling box 564 is used to spray cooling water onto the embossing roller 562 and the pressing roller 563 to achieve cooling and form a water diaphragm to avoid adhesion when the two squeeze the protective layer 17.

[0079] Further, if Figure 14-15As shown, the winding mechanism 6 includes a winding roller 61 rotatably disposed on the frame 2 and used for winding up the formed B1 class high flame retardant shielded network cable, a movable seat 62 disposed on the frame 2 and movable along the axial direction of the winding roller 61, and a positioning component 63 disposed on the movable seat 62 and used for positioning and winding up the formed B1 class high flame retardant shielded network cable.

[0080] In this embodiment, by providing a winding roller 61 to cooperate with a positioning assembly 63 that moves with a moving seat 62, the formed B1-level highly flame-retardant shielded network cable can be spirally wound into a bundle.

[0081] Further, if Figure 14-15 As shown, the positioning assembly 63 includes a support arm 631 rotatably set on the movable seat 62, a positioning through hole 632 set on the support arm 631, a positioning protrusion 633 formed on the inner annular surface of the positioning through hole 632 and used to position the anti-slip groove 172, a support rod 634 movably set on the support arm 631 and with the movement of the movable seat 62, the two ends of which are respectively abutted against the inner sides of the two ends of the winding roller 61, a fourth elastic member set on the support arm 631 and used to force both ends of the support rod 634 to extend out of the support arm 631, and a fifth elastic member set on the mounting seat and used to force the support arm 631 to rotate toward the winding roller 61.

[0082] In this embodiment, the positioning of the B1 class high flame retardant shielded network cable is achieved by providing a positioning protrusion 633 in cooperation with the positioning through hole 632 and the positioning anti-slip groove 172. At the same time, the support arm 631 cooperates with the fifth elastic member so that the support rod 634, under the action of the fourth elastic member, not only avoids interfering with the movement of the movable seat 62, but also allows it to always abut against the B1 class high flame retardant shielded network cable spirally wound on the winding roller 61, thereby achieving the positioning and winding between the B1 class high flame retardant shielded network cable and the winding roller 61.

[0083] In detail, when in use, under the action of the fifth elastic member, the support arm 631 rotates until it abuts against the outer wall of the positioning through hole 632 and abuts against the winding roller 61, and then the movable seat 62 is moved until the outer wall of the positioning through hole 632 abuts against the inner side of one end of the winding roller 61, and one end of the support rod 634 is retracted into the support arm 631, and the fourth elastic member is deformed to achieve the positioning between the B1-level high flame retardant shielded network cable in the positioning through hole 632 and the winding roller 61. When the B1-level high flame retardant shielded network cable is spirally wound, the winding roller 61 rotates and the movable seat 62 moves, and then the fourth elastic member restores the deformation to force the support rod 634 to extend and support the outside of the already wound B1-level high flame retardant shielded network cable, and support the positioning through hole 632 at a certain height to avoid movement interference with the wound B1-level high flame retardant shielded network cable.

[0084] It should be noted that the first elastic member, the second elastic member, the third elastic member 543, the fourth elastic member and the fifth elastic member are coil springs, leaf springs or torsion springs, etc., which themselves and their installation methods are all existing technologies, and the first elastic member, the second elastic member, the fourth elastic member and the fifth elastic member are not drawn in the accompanying drawings, so they will not be described in detail here.

[0085] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0086] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0087] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A B1 grade highly flame retardant shielded network cable, characterized in that: include: A first wire core, a first shielding layer wrapped around the outside of the first wire core, a plurality of second wire cores arranged at equal intervals along the circumference of the first wire core outside the first shielding layer, a second shielding layer wrapped around the outside of the plurality of second wire cores and forming a plurality of first shielding areas between the first shielding layer and used to shield the plurality of second wire cores respectively, a plurality of third wire cores respectively arranged between two adjacent second wire cores, a third shielding layer wrapped around the outside of the plurality of third wire cores and forming a plurality of second shielding areas between the second shielding layer and used to shield the plurality of third wire cores respectively; and a protective layer wrapped around the outside of the third shielding layer.

2. The B1-level highly flame-retardant shielded network cable according to claim 1, characterized in that: The B1 grade highly flame-retardant shielded network cable further includes a plurality of reinforcing ribs respectively arranged between the adjacent second cores and the third cores and located outside the third shielding layer, and the plurality of reinforcing ribs press the third shielding layer to bend between the second cores and the third cores to form a bending portion.

3. The B1-level highly flame-retardant shielded network cable according to claim 2, characterized in that: A plurality of limiting strips are formed on the inner side of the protective layer, and two limiting strips form a group and respectively limit the two sides of the reinforcing rib.

4. The B1-level highly flame-retardant shielded network cable according to claim 3, characterized in that: Anti-slip grooves are formed on the outer side of the protective layer at positions corresponding to the plurality of limit strips.

5. The B1-level highly flame-retardant shielded network cable according to claim 2, characterized in that: The B1-level highly flame-retardant shielded network cable further includes a flame-retardant material filled between the bending portion and the protective layer, and the flame-retardant material is magnesium hydroxide powder or aluminum hydroxide powder.

6. The B1-level highly flame-retardant shielded network cable according to claim 1, characterized in that: The first shielding layer, the second shielding layer and the third shielding layer are all copper foil or aluminum foil, and the thickness of the three is 0.5mm-1mm.

7. A method for manufacturing a network cable, used for manufacturing a Class B1 highly flame-retardant shielded network cable as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: a first wire joining process, after the first shielding layer is wrapped around the outside of the first wire core, a plurality of the second wire cores are evenly spaced and attached to the outer wall of the first shielding layer; Step 2: a second wire joining process, after the second shielding layer is wrapped around the outside of a plurality of the second cores, a plurality of the third cores are evenly spaced and attached to the outer wall of the second shielding layer, and the third cores squeeze the second shielding layer and bend between two adjacent second cores until the second shielding layer is attached to the first shielding layer to form a plurality of the first shielding areas; Step 3: Injection molding process, wrapping the third shielding layer around the outside of the plurality of third cores, and after the third shielding layer is attached to the second shielding layer to form a plurality of the second shielding areas, injection molding the protective layer outside the third shielding layer; Step 4: a winding process, wherein the protective layer is cooled and solidified, so that the B1-level highly flame-retardant shielded network cable is formed, and then the B1-level highly flame-retardant shielded network cable is rolled into a bundle.

8. A network cable manufacturing method according to claim 7, characterized in that: In step three, before injection molding the protective layer, a plurality of reinforcing ribs are evenly spaced on the outer wall of the third shielding layer, and the plurality of reinforcing ribs press the third shielding layer to bend between the adjacent second cores and the third cores to form a plurality of bent portions, and flame retardant material is filled in the bent portions.

9. A network cable manufacturing method according to claim 8, characterized in that: In step 4, before the protective layer cools down and solidifies, a plurality of anti-slip grooves are pressed and formed on the outer wall of the protective layer, and a plurality of limiting strips for limiting the reinforcing ribs are pressed and formed at corresponding positions on the inner wall of the protective layer.

10. A network cable manufacturing method according to claim 8, characterized in that: The widths of the first shielding layer, the second shielding layer and the third shielding layer are all 1.5 cm-2.5 cm and the winding speeds are all 1000-1500 r / min, and the transmission speed of the first core is 300-500 cm / min.

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