A production device and production process of a mine wear-resistant cable

Abstract

The application relates to a production device and production process of a mine wear-resistant cable, and relates to the technical field of cable production.The production device comprises a rack, a stranding reel, a combining die and a detection assembly.The stranding reel is rotationally installed on the rack, a plurality of threading holes for single wires to pass through are formed in the stranding reel, the plurality of threading holes are uniformly and interval arranged around the axis of the stranding reel, a first driving element for driving the stranding reel to rotate is arranged on the rack, the combining die is slidingly installed on the rack and coaxially arranged with the stranding reel, and the winding points of the plurality of single wires are located in the combining die, a second driving element for driving the combining die to move along the direction of approaching or moving away from the stranding reel is arranged on the rack, and the detection assembly is installed on the combining die.The detection assembly is used for detecting whether the single wires on the wire core at the discharging end of the combining die are closely wound with each other.The application has the effect of guaranteeing the production efficiency and the production quality of the stranding machine.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cable production, in particular to a production device and production process of a mine wear-resistant cable. BACKGROUND

[0002] The core is a core component of the cable, and the core is usually a rope-like structure formed by twisting several or several groups of wires (at least two wires in each group), each group of wires is insulated from each other, and is usually twisted around a center, and the whole is covered with a highly insulating cover layer.

[0003] The stranding machine is a core equipment for producing the core, before the stranding machine winds the multiple single wires, the pitch ratio of the single wire (it refers to the ratio of the complete helical pitch of any single wire in each layer of the stranded wire to the outer diameter of the stranded wire in the stranded wire axis direction) needs to be adjusted, and the pitch ratio is related to the tightness of the stranded wire, the weight of the stranded wire and the size of the stranded wire resistance, if the pitch ratio is set too large, the twisted product may be too loose, and the tightness is not good, which affects the quality and performance of the product.

[0004] In the prior art, the looseness of part of the cores produced by the equipment is detected to determine whether the pitch ratio of the single wire is set appropriately, and the pitch ratio of the single wire needs to be adjusted to an appropriate value through multiple detections and adjustments, the operation steps are too cumbersome, and the production efficiency of the stranding machine is greatly reduced. SUMMARY

[0005] The application aims to provide a production device and production process of a mine wear-resistant cable, which can detect the quality of the produced core in real time, and can adjust the pitch ratio of the single wire in real time, thereby ensuring the production efficiency and the production quality of the stranding machine.

[0006] In a first aspect, the application provides a production device of a mine wear-resistant cable, which adopts the following technical scheme:

[0007] A rack;

[0008] A stranding disc is rotatably installed on the rack, a plurality of threading holes for the single wire to pass through are formed in the stranding disc, the plurality of threading holes are uniformly and interval arranged around the stranding disc axis, and a first driving member for driving the stranding disc to rotate is arranged on the rack;

[0009] A combination mold is slidably installed on the rack and coaxially arranged with the stranding disc, and the multiple single wire winding points are located in the combination mold, and a second driving member for driving the combination mold to move towards or away from the stranding disc is arranged on the rack;

[0010] A detection assembly is installed on the combining die, and the detection assembly is used to detect whether the single wires on the core of the combining die are tightly entangled with each other.

[0011] Optionally, the detection assembly comprises a drip tube and a collection tank, the drip tube is installed on the combining die, the output end of the drip tube is located on the side of the combining die away from the stranding drum and directly above the core, the collection tank is located directly below the core, three notches are arranged on the collection tank, the middle notch of the collection tank corresponds to the middle part of the core, and the notches on the two sides of the collection tank correspond to the two edge parts of the core, and a pressure sensor is arranged in each of the three notches.

[0012] Optionally, the liquid flowing out of the drip tube is a continuous liquid.

[0013] Optionally, the core is provided with a positioning assembly, the positioning assembly is provided in two groups, the two groups of positioning assemblies are oppositely arranged along the length direction of the core and are respectively located on the two sides of the collection tank, and the two groups of positioning assemblies can position the part of the core above the collection tank to prevent the part of the core from shaking.

[0014] Optionally, four flow guides are arranged on the collection tank, the four flow guides divide the space between the collection tank and the part of the core above the collection tank into three parts, and the three parts of space correspond to the three notches one by one.

[0015] Optionally, the connecting part of the flow guide and the core is an elastic body, and the flow guide is tightly attached to the outer wall of the core.

[0016] Optionally, a blowing assembly is arranged on the combining die, the output end of the blowing assembly is located on the same vertical plane as the core and the collection tank, and the output end of the blowing assembly directly faces the core.

[0017] Optionally, a circulating collection assembly is further arranged on the combining die, the circulating collection assembly collects the liquid in the collection tank, and the collected liquid is guided back into the drip tube.

[0018] In a second aspect, the application provides a production process of a mine wear-resistant core, based on the production device of any one of the above-mentioned mine wear-resistant cable, comprising the following steps:

[0019] S1: conductor processing, a plurality of single wires are sequentially threaded through the stranding drum and the combining die, the stranding drum is rotated, the plurality of single wires form a stranded core, and the stranded core is wound on the bunching machine;

[0020] S2: The detection assembly detects that the liquid drops into the middle slot of the collection tank, indicating that the produced core is loose, and the driving member is started to drive the combined die to move in the direction close to the winding disc to reduce the pitch ratio and improve the tightness of the single wire; the detection assembly continues to detect, and it is assumed that the liquid continues to drop into the middle slot of the collection tank, indicating that the produced core is still loose, and the adjustment assembly is started to adjust the tension of the single wire to improve the tightness of the single wire again;

[0021] S3: Sheath injection molding, a layer of plastic sheath is extruded on the outermost layer of the core to protect the core from environmental factors;

[0022] S4: Perform various performance tests on the core, including appearance, size, electrical performance, etc., and after passing the test, the core is packaged in a roll or a disc for transportation and storage.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When multiple single wires are wound into a core, the core will continue to move along the combined die, at which time the liquid in the liquid drop pipe will drop onto the core. If the single wires on the core are wound tightly, the liquid that drops onto the core will drop from the two sides of the core along the outer wall of the core, and the liquid that drops from the two sides of the core will fall into the slots on the two sides of the collection tank. At this time, the liquid will fall on the pressure sensor in the slot and exert pressure on the pressure sensor. After receiving the signal from the pressure sensor in the slot on the two sides, the control center will determine that this section of the core is a qualified product. If the single wires on the core are not wound tightly, the core will appear loose, i.e. the core will have a hollow. At this time, part of the liquid that drops on the core will pass through the middle of the core and drop into the middle slot of the collection tank. At this time, the pressure sensor in the middle slot will be subjected to pressure and will transmit a signal to the control center. At this time, the control center will start the second driving member to drive the combined die to move in the direction close to the winding disc, thereby reducing the pitch ratio of the single wire and improving the tightness of the single wire winding, thereby improving the production quality of the core;

[0025] 2. After adjusting the pitch ratio of the single wire, the detection assembly still detects that the core is loose, indicating that the tension of the single wire is small at this time. Therefore, after the staff sees the signal sent by the control center, the staff can adjust the tension of the single wire in time through the adjustment assembly, thereby further improving the production quality of the core;

[0026] 3. Since the core will produce wobble in the process of moving, it is easy to cause the liquid on the core to splash out of the collection tank, or the corresponding liquid to drop into the corresponding groove, therefore, the setting of the positioning assembly can ensure that the core of the detected part is in a stable moving state, so as to ensure that the liquid drops on the core can be stably dropped, thereby improving the accuracy of the detection assembly;

[0027] 4. The setting of the guide plate can guide the liquid dropped from the core into the corresponding groove, thereby avoiding the liquid from dropping into the middle groove or outside the collection tank as much as possible, thereby further improving the detection accuracy of the detection assembly in the application, and further improving the production quality of the core;

[0028] 5. The setting of the blowing assembly can accelerate the dropping of the liquid on the core, thereby avoiding the situation that the liquid adheres to the core and cannot drop as much as possible, thereby further improving the accuracy of the detection assembly; on the other hand, since the core cannot adhere to the sundries, it is easy to cause the core to short circuit during work, therefore, the blowing assembly can also blow off the liquid or sundries adhering to the core, thereby further improving the production quality of the core. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is the overall structure schematic diagram of embodiment 1 of the application;

[0030] Figure 2 is the structure schematic diagram of the detection assembly in embodiment 1 of the application;

[0031] Figure 3 is the structure schematic diagram of the collection tank in embodiment 1 of the application;

[0032] Figure 4 is Figure 3 is the enlarged schematic diagram of A in FIG. 4;

[0033] Figure 5 is the structure schematic diagram of the circulating collection assembly in embodiment 1 of the application;

[0034] Figure 6 is Figure 5 is the enlarged schematic diagram of B in FIG. 5;

[0035] Figure 7 is Figure 5 is the enlarged schematic diagram of C in FIG. 6;

[0036] In the figure, 1, rack; 11, first driving part; 111, driving motor; 112, gear; 12, second driving part; 13, mounting frame; 15, wire supply drum; 2, spool; 21, threading hole; 22, gear slot; 3, splicing die; 31, support frame; 4, detection assembly; 41, droplet tube; 42, collection groove; 43, notch; 44, pressure sensor; 45, flow guide plate; 5, positioning assembly; 6, blowing assembly; 7, circulating collection assembly; 71, collection box; 72, filter screen; 73, pump. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying drawings. Figures 1-7 The present application will be further described in detail. Example 1

[0038] A production device of a mine wear-resistant cable, referring to Figures 1-7 , comprising a rack 1, a spool 2, a splicing die 3 and a detection assembly 4.

[0039] The upper end surface of the rack 1 is fixedly provided with a mounting frame 13, the mounting frame 13 in the embodiment is arranged along the horizontal direction, the spool 2 is coaxially and rotatably installed on the mounting frame 13, a plurality of threading holes 21 for single wires to pass through are formed on the spool 2, four threading holes 21 are provided in the embodiment, and the four threading holes 21 are uniformly and spacedly arranged around the axis of the spool 2. One end of the spool 2 is provided with four wire supply drums 15, the four wire supply drums 15 are all rotatably connected to the spool 2, the four wire supply drums 15 correspond to the four threading holes 21 one by one, and each wire supply drum 15 has single wires wound thereon, and the single wires on each wire supply drum 15 all pass through the corresponding threading hole 21.

[0040] The rack 1 is further provided with a first driving part 11 for driving the spool 2 to rotate, the first driving part 11 in the embodiment comprises a first driving motor 111 and a gear 112, a gear slot 22 is formed on the outer peripheral wall of the spool 2 in the embodiment, the gear 112 is rotatably installed on the rack 1, the gear 112 is engaged with the spool 2, and the driving motor 111 is installed on the rack 1, and the output shaft of the first driving motor 111 is coaxially and fixedly connected with the gear 112.

[0041] The splicing die 3 in the embodiment is provided as a square tube, a support frame 31 is slidably arranged on the rack 1, the splicing die 3 is fixedly installed on the support frame 31, and the splicing die 3 is coaxially arranged with the spool 2, and the winding points of the plurality of single wires are located in the splicing die 3. The rack 1 is provided with a second driving part 12 for driving the splicing die 3 to move along the direction of approaching or moving away from the spool 2, the second driving part 12 in the embodiment is provided as a hydraulic cylinder, and the output shaft of the hydraulic cylinder is fixedly connected with the support frame 31.

[0042] Referring to Figure 2 , Figure 3 and Figure 4The detection assembly 4 comprises a drip tube 41 and a collection tank 42.

[0043] The drip tube 41 is fixedly installed on the support frame 31, and the output end of the drip tube 41 is located above the core and on the side of the combining die 3 away from the twisting reel 2. The collection tank 42 is located below the core, and three notches 43 are arranged on the collection tank 42. The middle notch 43 of the collection tank 42 corresponds to the middle part of the core, and the notches 43 on both sides of the collection tank 42 correspond to the two edge parts of the core, respectively. A pressure sensor 44 is arranged in each of the three notches 43. In the embodiment, the sensing part of the pressure sensor 44 in the notch 43 covers the entire bottom of the notch 43, so that the liquid dropped at any position in the notch 43 can be detected. A stranding machine is arranged on the side of the combining die 3 away from the twisting reel 2 to pull and collect the twisted core. The stranding machine is not shown in the embodiment.

[0044] When the core needs to be produced, a plurality of single wires are simultaneously passed through the combining die 3, and the single wires passing through the combining die 3 are moved in the direction away from the twisting reel 2 by the stranding machine. At the same time, the driving motor 111 is started to drive the twisting reel 2 to rotate. The twisting reel 2 will intertwine the plurality of single wires when rotating. The intertwining points of the plurality of single wires are located in the combining die 3 and relatively close to the twisting reel 2. After the plurality of single wires are intertwined, the core is formed. The core extends from the end of the combining die 3 away from the twisting reel 2. The drip tube 41 is opened before the core passes out of the combining die 3.

[0045] In the process of moving away from the direction of the combined die 3, the liquid in the liquid drop tube 41 will drop on the core. If the multiple single wires on the core are tightly wound, the liquid dropped on the core will drop from the two sides of the core along the outer wall of the core, and the liquid dropped from the two sides of the core will fall into the notches 43 on both sides of the collection groove 42. At this time, the liquid will fall on the pressure sensor 44 in the notch 43 and exert pressure on the pressure sensor 44. After receiving the signal of the pressure sensor 44 in the notch 43 on both sides, the control center will determine that the core is a qualified product. If the single wires on the core are not tightly wound, the core will appear loose, and there will be gaps between the multiple single wires, that is, the core will appear hollow. At this time, part of the liquid dropped on the core will pass through the middle part of the core and drop into the middle notch 43 in the collection groove 42. At this time, the pressure sensor 44 in the middle notch 43 will be subjected to pressure and will transmit a signal to the control center. At this time, the control center will start the hydraulic cylinder, the hydraulic rod will be elongated to drive the combined die 3 to move in the direction of approaching the spool 2, so as to reduce the pitch ratio of the single wire, that is, to reduce the spacing of the single wire helix. After the spacing of the single wire helix is reduced, the number of turns of the single wire per unit length will increase, so that the multiple single wires will be wound more tightly when winding, and the gap between the multiple single wires will be smaller or even no gap, thereby improving the tightness of the multiple single wires as a whole and improving the production quality of the core.

[0046] In the process of adjusting the pitch ratio of the core, the device does not need to be manually stopped for operation, greatly improving the production effect of the device. At the same time, the device can always be in a self-adaptive adjustment state so that the pitch ratio of the device is always at a relatively appropriate value, greatly improving the automation degree of the device and the production quality of the device.

[0047] It should be noted that one end of the drip pipe 41 is located in the positive direction of the core in the embodiment, and the other end of the drip pipe 41 is connected to the liquid supply device, which is not shown in the embodiment, and the liquid used therein is a liquid that is repulsive to metals such as copper and aluminum, i.e. a liquid that is not easy to wet or difficult to spread on the surface of these metals, usually having a lower surface tension or weaker interaction with these metals, such as machine oil, gasoline and concentrated sugar water, etc., so as to avoid the liquid adhering to the core as much as possible. In actual operation, the appropriate liquid needs to be selected according to the material of the core; in addition, the liquid flowing out of the bottom liquid pipe is a continuous liquid, so that the liquid can flow to every part of the core, thereby ensuring that the detection assembly 4 can accurately detect every part of the core.

[0048] In addition, the combined mold 3 is also provided with two sets of positioning assemblies 5, which are provided as positioning wheels in the embodiment. Each set of positioning wheels is provided with two positioning wheels. One set of positioning wheels is located at one end of the combined mold 3 away from the stranding disc 2, and the other set of positioning wheels is located at one side of the combined mold 3 away from the stranding disc 2, and has a certain distance from the set of positioning wheels mentioned above. The two sets of positioning wheels are located on the same horizontal plane, and the two positioning wheels in each set also clamp the core. The distance between the two sets of positioning wheels is equal to the length of the collection groove 42.

[0049] When the core moves in the direction away from the combined mold 3, the core may shake, which can easily cause the liquid on the core to splash out of the collection groove 42 or the corresponding liquid to drop into the corresponding slot 43. The two sets of positioning wheels in the embodiment can position the two ends of a section of the core, thereby ensuring that the detected part of the core is in a stable moving state, so that the liquid droplets on the core can stably drop into the corresponding slot 43, thereby improving the accuracy of the detection assembly 4. At the same time, since the core itself has a certain elasticity, the multiple single wires can be shaken apart under high frequency. The positioning wheels in the embodiment can reduce the frequency of core shaking, thereby avoiding the shaking apart of the core as much as possible, and further improving the production quality of the core.

[0050] Referring to Figure 5 , Figure 6 and Figure 7 , in order to further accurately drop the liquid on the core into the corresponding slot 43, the collection groove 42 in the embodiment is also provided with a flow guide plate 45.

[0051] The four flow guides 45 in the embodiment divide the space between the collection groove 42 and the upper part of the wire core into three parts, and the three parts of space correspond to the three notches 43 one by one, so when the liquid falls from the edge of the wire core, due to the arrangement of the flow guide 45, the liquid can only fall into the corresponding two side notches 43 from the edge of the wire core; similarly, when the liquid falls from the middle part of the wire core, due to the arrangement of the flow guide 45, the liquid can also only flow into the corresponding middle notch 43, thereby avoiding the situation that the liquid on the wire core falls into the notch 43 that does not correspond or outside the collection groove 42 as a whole, thereby further improving the detection accuracy of the detection assembly 4 in the application, and also further improving the production quality of the wire core.

[0052] At the same time, the two flow guides 45 in the middle in the embodiment are in contact with the wire core, in order to improve the tightness of the contact between the flow guide 45 and the wire core, the contact part of the two flow guides 45 in the middle in the embodiment is provided as an elastic body, on the one hand, the elastic body can produce a certain deformation, so it can better fit the uneven outer peripheral wall of the wire core, thereby avoiding the situation that the liquid flows into the notch 43 that does not correspond from the gap between the flow guide 45 and the wire core, thereby avoiding the situation that the pressure sensor 44 in the notch 43 that does not correspond generates a signal, thereby further improving the detection accuracy of the detection assembly 4, and also further improving the production quality of the wire core.

[0053] The blow assembly 6 in the embodiment is also provided on the combined die 3, the blow assembly 6 in the embodiment is provided as a blow pipe, the blow pipe is fixedly installed on the support frame 31, the air outlet of the blow pipe is arranged at the upper end of the wire core in the vertical direction, and the air outlet of the blow pipe is also located directly above the collection groove 42, the other end of the blow pipe is connected to an external air source, which is not shown in the embodiment.

[0054] When the liquid on the wire core drops into the slot 43 in the collecting groove 42, the liquid in the slot 43 will flow into the collecting box 71, and then under the action of the pump 73, the liquid in the collecting box 71 will be re-directed into the liquid drop pipe 41, thereby realizing the recycling of the liquid, thereby realizing the reuse of resources as a whole, reducing the resource consumption of the device; in addition, the connecting part of the collecting box 71 and the backflow pipe in the embodiment is provided with a filter screen 72, so as to avoid the situation that the sundries in the collecting groove 42 are guided to the liquid drop pipe 41, causing the wire core to be contaminated.

[0055] Finally, the support frame 31 in the embodiment is also provided with a circulating collection assembly 7, which includes a collecting box 71, a backflow pipe and a pump 73.

[0056] The collecting box 71 is fixedly installed on the support frame 31, and in the embodiment, the collecting groove 42 is inclinedly arranged along the direction close to the collecting box 71, all the slots 43 on the collecting groove 42 are in communication with the collecting box 71, one end of the backflow pipe is in communication with the collecting box 71, the other end of the backflow pipe is in communication with the liquid drop pipe 41, and the pump 73 is installed on the support frame 31 and is in communication with the backflow pipe.

[0057] When the liquid on the wire core drops into the slot 43 in the collecting groove 42, the liquid in the slot 43 will flow into the collecting box 71, and then under the action of the pump 73, the liquid in the collecting box 71 will be re-directed into the liquid drop pipe 41, thereby realizing the recycling of the liquid, thereby realizing the reuse of resources as a whole, reducing the resource consumption of the device; in addition, the connecting part of the collecting box 71 and the backflow pipe in the embodiment is provided with a filter screen 72, so as to avoid the situation that the sundries in the collecting groove 42 are guided to the liquid drop pipe 41, causing the wire core to be contaminated. Embodiment 2

[0058] A production process of a mine wear-resistant cable, based on the above-mentioned production device of a mine wear-resistant cable, comprising the following steps:

[0059] S1: conductor processing, the plurality of single wires on the supply drum 15 are sequentially threaded through the adjusting wheel, the stranding drum 2 and the combining die 3, the stranding drum 2 is rotated, the plurality of single wires form a stranded core, and the stranded core is wound on the bunching machine;

[0060] S2: the detection assembly 4 detects that the liquid drops into the middle notch 43 of the collecting groove 42, indicating that the produced core is loose, the driving member is started to drive the combining die 3 to move along the direction close to the winding drum, so as to reduce the pitch ratio and improve the tightness of the single wire;

[0061] S3: sheath injection molding, a plastic sheath is extruded on the outermost layer of the qualified core produced in S2, so as to protect the cable from environmental factors;

[0062] S4: the cable is subjected to various performance tests, including appearance, size, electrical performance and the like, and after the test is qualified, the cable is packaged in a roll or a disc for transportation and storage.

[0063] Through the above method, the manufactured cable not only has extremely high quality, but also greatly improves the production efficiency of the cable through the above method.

[0064] The embodiments of the specific embodiment are the preferred embodiments of the application, not limited to the protection scope of the application, wherein the same parts are indicated by the same reference numerals. Therefore: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. An apparatus for producing a mine-resistant wear cable, characterized by, It includes: Frame (1); Reel (2), rotatably mounted on the frame (1), a plurality of wire holes (21) are provided on the reel (2) for single wire, a plurality of wire holes (21) are uniformly distributed around the reel (2) axis, the frame (1) is further provided with a first driving element (11) for driving the reel (2) to rotate; The combined die (3) is slidably mounted on the frame (1), and is coaxially arranged with the reel (2), and a plurality of single wires are wound in the combined die (3), the frame (1) is provided with a second driving element (12) for driving the combined die (3) to move along the direction close to or away from the reel (2); Detection assembly (4) is installed on the combined die (3), the detection assembly (4) is used for detecting whether the single wire on the core of the combined die (3) is closely wound or not; The detection assembly (4) includes a drip tube (41) and a collection tank (42), the drip tube (41) is installed on the combined die (3), the output end of the drip tube (41) is located on the side of the combined die (3) away from the reel (2), and is located directly above the core, the collection tank (42) is located directly below the core, the collection tank (42) is provided with three notches (43), the middle notch (43) of the collection tank (42) corresponds to the middle part of the core, the notches (43) on both sides of the collection tank (42) correspond to the two edge parts of the core respectively, and the three notches (43) are provided with pressure sensors (44); The collection tank (42) is provided with four guide plates (45), the four guide plates (45) divide the space between the collection tank (42) and the upper part of the collection tank (42) into three parts, and the three parts of space correspond to the three notches (43) one by one.

2. A device for producing a mine-resistant cable according to claim 1, characterized in that, The liquid from the drip tube (41) is a continuous liquid.

3. A device for producing a mine-resistant cable according to claim 1, characterized in that, The core is provided with a positioning assembly (5), the positioning assembly (5) is provided with two groups, the two groups of positioning assemblies (5) are oppositely arranged along the length direction of the core, and are located on both sides of the collection tank (42) respectively, the two groups of positioning assemblies (5) can position the part of the core above the collection tank (42) to prevent the part of the core from shaking.

4. The apparatus for producing a mine-resistant cable according to claim 1, wherein The connecting part of the guide plate (45) and the core is provided as an elastic body, and the guide plate (45) is closely attached to the outer wall of the core.

5. A device for producing a mine-resistant cable according to claim 4, characterized in that, The combined die (3) is provided with a blowing assembly (6), the output end of the blowing assembly (6) is located in the same vertical plane with the core and the collection tank (42), and the output end of the blowing assembly (6) faces the core.

6. A device for producing a mine-resistant cable according to claim 1, characterized in that, The combined die (3) is further provided with a circulating collection assembly (7), the circulating collection assembly (7) collects the liquid in the collection tank (42), and the collected liquid is guided into the drip tube (41) again.

7. A production process of mine wear-resistant core, based on the production device of any one of claims 1-6, comprising the following steps: S1: conductor processing, a plurality of single wires are sequentially threaded through the stranding disc (2) and the combining die (3), the stranding disc (2) is rotated, the plurality of single wires form a stranded core, and the stranded core is wound on the bunching machine; S2: the detection assembly (4) detects that the liquid drop drops into the middle notch (43) on the collecting groove (42), indicating that the produced core appears to be loose, the driving member drives the combining die (3) to move along the direction close to the winding disc, so as to reduce the pitch ratio and improve the tightness of the single wire; S3: sheath injection molding, a layer of plastic sheath is extruded on the outermost layer of the core to protect the core from environmental factors; S4: the core is subjected to various performance tests, including appearance, size, electrical performance, and after the test is qualified, the core is wound or packaged in a disc for transportation and storage.

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