High-frequency low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment

Abstract

The invention relates to the technical field of stranded wire manufacturing, in particular to high-frequency low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment which comprises a driving main shaft, two rotating discs are arranged on the driving main shaft, a plurality of sets of single wire erecting mechanisms are arranged between the two rotating discs, and each set of single wire erecting mechanism comprises an installation frame and a wire wheel. Two rotary plug connectors are arranged between the wire wheel and the mounting frame, a resistance increasing mechanism is arranged on the mounting frame and comprises a jacking frame, a friction head and a rotating roller, and in the initial stage of stranded wire manufacturing, the rotating roller in the resistance increasing mechanism is always pressed on a coil of the wire wheel by means of the elastic acting force of the jacking frame to play an auxiliary braking role in rotation of the wire wheel; and after entering the middle and last stage, along with the gradual reduction of the diameter of the coil, the jacking frame drives the friction head to gradually approach and press the rotating pin, so that the rotating friction resistance of the wire wheel is directly increased, the wire wheel is effectively prevented from excessively rotating due to winding tension, and the tightness and the uniformity of a stranded wire formed by winding a plurality of steel wires are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of stranded wire manufacturing technology, specifically to a high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment. Background Technology

[0002] Copper-clad steel stranded wire is a composite wire in which a copper layer is wrapped around a steel wire. It is made of a certain number of copper-clad steel single wires twisted together. It utilizes the skin effect of low-voltage high-frequency signals, so that the signal travels along the surface in the high-frequency region. As long as the copper layer thickness reaches a certain range, it can ensure the transmission of signals in a certain frequency band. Among them, copper plays the role of conducting weak electrical signals, while steel wire plays the role of support. In the manufacturing process of high-frequency, low-loss copper-clad steel electromagnetic shielded stranded wire, existing stranded wire manufacturing equipment has significant shortcomings in ensuring product quality and production efficiency. The specific defects are as follows: Firstly, from the perspective of the stability of steel wire output, in the middle and late stages of strand manufacturing, the existing equipment continuously outputs a single steel wire from the spool, which reduces the overall weight of the spool and the friction between multiple steel wires. Meanwhile, the winding spool continues to wind up. During this process, the spool is prone to excessive rotation due to the tension of the steel wire, which leads to slack in the steel wire drawn from the spool. This slack will seriously affect the tightness and uniformity of the strand formed by the multiple steel wires winding together, resulting in quality defects in the finished strand. It cannot meet the performance requirements of high-frequency, low-loss copper-clad steel electromagnetic shielded stranded wire, greatly reducing the product qualification rate. Secondly, in terms of production efficiency, the existing equipment has a cumbersome and complicated process for changing the wire reels. After all the steel wire on the reel has been output, changing the reel often requires disassembling multiple parts. The operation steps are numerous and time-consuming, causing the equipment to be in a state of shutdown for a long time during the reel replacement period, which seriously affects the overall production progress and cannot meet the needs of efficient production. Summary of the Invention

[0003] Therefore, it is necessary to provide a high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment to address the existing technical problems.

[0004] To address the problems of existing technologies, the present invention adopts the following technical solution: a high-frequency, low-loss copper-clad steel electromagnetic shielded stranded wire manufacturing equipment, comprising a horizontally arranged drive spindle, on which are two turntables spaced apart along their axial direction and coaxially fixedly connected. Between the two turntables are several sets of single-wire mounting mechanisms arranged in a circular array. Each set of single-wire mounting mechanisms includes a mounting frame and a wire reel. The mounting frame is connected to the two turntables, and the wire reel is disposed within the mounting frame. Two wire supply reels are provided between the wire reel and the mounting frame. A quick-change rotary connector, each of which includes a pivot pin that can slide along the axial direction of the spool and is plugged into its end, is provided on the mounting frame with a resistance-increasing mechanism corresponding to one of the pivot pins. The resistance-increasing mechanism includes a pressure frame, a friction head, and a rotating roller. The pressure frame is elastically connected to the mounting frame. The friction head and the rotating roller are both connected to the pressure frame. The rotating roller is always pressed against the coil wound on the spool by the pressure frame. As the coil on the spool gradually decreases, the friction head is gradually pressed against the pivot pin by the pressure frame.

[0005] To enable the swivel pin to be connected to the reel, each of the swivel pins also includes a connecting plate. The connecting plate is coaxially fixed to the end of the corresponding reel. The outer walls on both sides of the mounting bracket are provided with guide sleeves for the corresponding swivel pin to pass through horizontally. Each swivel pin has a multi-faceted insert formed on one end of the end that passes through the guide sleeve. The multi-faceted insert extends along the axial direction of the swivel pin. The connecting plate has a slot for the multi-faceted insert to be inserted and mated with it.

[0006] To facilitate the axial sliding of the pivot pins, limiting frames are fixedly provided on the outer walls of both sides of the mounting bracket. Each limiting frame is formed with a limiting sleeve for the corresponding pivot pin to pass through horizontally. Each pivot pin is formed with a protruding ring. Each pivot pin is fitted with a No. 1 spring, and the two ends of the No. 1 spring abut against the limiting sleeve and the protruding ring, respectively.

[0007] To achieve an elastic connection between the top pressure frame and the mounting frame, a U-shaped bracket is fixedly provided at the bottom of the mounting frame below one of the pivot pins. A horizontal plate is formed on the U-shaped bracket, and the top pressure frame is located above the horizontal plate. Several vertically downward limiting rods are formed at the bottom of the top pressure frame, passing through the horizontal plate. A second spring is fitted on each limiting rod, and the two ends of the second spring abut against the horizontal plate and the top pressure frame, respectively.

[0008] To demonstrate how the roller is installed, the top pressure frame is U-shaped, and a support rod parallel to the reel is fixed on one of the vertical ends of the top pressure frame. The roller is hollow and rotatably mounted on the support rod. Annular limiting blocks and limiting nuts are fixed on the support rod at both ends of the roller.

[0009] To demonstrate the specific structure of the friction head, the friction head includes a support base and a semi-circular rubber strip. The support base is fixedly connected to the other vertical end of the top pressure frame. The top of the support base is formed with a semi-circular ring with its opening facing the corresponding pivot pin. The semi-circular rubber strip is fixedly embedded in the semi-circular ring, and the opening of the semi-circular rubber strip faces the corresponding pivot pin.

[0010] To ensure that the single steel wire drawn from the spool does not sway left or right at the convergence point, a central ring is fixed on the mounting frame at intervals from the spool. The axis of the central ring is perpendicular to the axis of the spool, and the axis of the central ring intersects the center of the axis of the spool. The single steel wire drawn from the spool passes through the central ring.

[0011] To prevent excessive swaying during output of a single steel wire leading from the spool to the central ring due to an excessively large output direction offset angle, a correction ring is provided between the central ring and the spool. The axis of the correction ring is perpendicular to the axis of the spool. Fixed sleeves parallel to the spool are formed on the inner walls of both sides of the mounting bracket. Two symmetrical sliding shafts are formed on the outer wall of the correction ring. Each sliding shaft is coaxially inserted into the corresponding fixed sleeve. Each fixed sleeve is provided with a No. 3 spring that pushes the sliding shaft outward.

[0012] To limit the axial movement of the spool, flat bearings are embedded on the inner walls of both sides of the mounting frame. After the spool is placed in the mounting frame, the connecting discs at both ends of the spool abut against the two flat bearings respectively.

[0013] To prevent hard friction between the rotating roller and the coil inside the reel, a rubber sleeve is fitted on the outer wall of the rotating roller.

[0014] The beneficial effects of this invention compared to the prior art are: Firstly, addressing the issue of wire slack that easily occurs in the final stage of strand manufacturing in existing equipment, this invention incorporates a resistance-increasing mechanism. In the initial stage of strand manufacturing, the rotating roller in the resistance-increasing mechanism, aided by the elastic force of the top pressure frame, constantly presses against the coil of the wire wheel, providing auxiliary braking to the rotation of the wire wheel and further preventing wire slack. In the later stages, as the coil diameter gradually decreases, the top pressure frame drives the friction head to gradually approach and press against the rotating pin, directly increasing the rotational friction resistance of the wire wheel. This effectively prevents the wire wheel from excessively rotating due to winding tension. In summary, this resistance-increasing method ensures that the wire drawn from the wire wheel remains taut throughout the entire manufacturing process, significantly improving the tightness and uniformity of the strand formed by multiple wires winding together, and greatly increasing the product qualification rate. Secondly, this patent simplifies the reel replacement process by using two sets of rotating connectors: the pivot pin in the rotating connector can slide axially, and with the precise insertion structure of the multi-faceted insert and slot on the connecting plate, when replacing the reel, simply pull out the pivot pin, insert the new reel, and release the pivot pin. The spring force of the first spring will automatically drive the pivot pin to complete the insertion and fixation with the reel. The entire replacement process does not require disassembling complex parts, has fewer operation steps and shorter time consumption, effectively reduces equipment downtime, significantly improves the production efficiency of high-frequency low-loss copper-clad steel electromagnetic shielded stranded wire, and meets the needs of efficient industrial production. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of a single-line mounting mechanism. Figure 1 ; Figure 3 yes Figure 2 A magnified view of the area indicated by A1 in the diagram; Figure 4 This is a side view of a single-line support structure; Figure 5 yes Figure 4 Sectional view along line AA; Figure 6 yes Figure 5 The enlarged view of the area indicated by A2 in the diagram; Figure 7 This is a top view of a single-line support structure; Figure 8 yes Figure 7 Sectional view along line BB; Figure 9 This is a schematic diagram of the three-dimensional structure of a single-line mounting mechanism. Figure 2 ; Figure 10 It is an exploded three-dimensional diagram of the pivot and reel.

[0016] The following are the labels in the diagram: 1. Drive spindle; 2. Turntable; 3. Single-line support mechanism; 4. Mounting frame; 5. Wire wheel; 6. Turning pin; 7. Top pressure frame; 8. Friction head; 9. Rotary roller; 10. Connecting plate; 11. Guide sleeve; 12. Multi-faceted insert; 13. Slot; 14. Limiting frame; 15. Limiting sleeve; 16. Convex ring; 17. Spring No. 1; 18. U-shaped bracket; 19. Horizontal plate; 20. Limiting rod; 21. Spring No. 2; 22. Support rod; 23. Annular limiting block; 24. Limiting nut; 25. Support seat; 26. Semi-circular rubber strip; 27. Semi-circular ring; 28. Central ring; 29. ​​Correction ring; 30. Fixed sleeve; 31. Sliding shaft; 32. Spring No. 3; 33. Flat bearing; 34. Rubber sleeve. Detailed Implementation

[0017] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0018] refer to Figures 1 to 5 The high-frequency, low-loss copper-clad steel electromagnetic shielded stranded wire manufacturing equipment shown includes a horizontally arranged drive spindle 1. Two turntables 2 are spaced apart along the spindle's axial direction and coaxially fixed to it. Several sets of single-wire support mechanisms 3 arranged in a circular array are arranged between the two turntables 2. Each set of single-wire support mechanisms 3 includes a mounting frame 4 and a wire reel 5. The mounting frame 4 is connected to the two turntables 2, and the wire reel 5 is located within the mounting frame 4. Two rotating inserts for quick replacement of the wire reel 5 are provided between the wire reel 5 and the mounting frame 4. Each rotating connector includes a pivot pin 6 that can slide along the axial direction of the reel 5 and be inserted into its end. The mounting frame 4 is provided with a resistance increasing mechanism corresponding to one of the pivot pins 6. The resistance increasing mechanism includes a top pressure frame 7, a friction head 8, and a rotating roller 9. The top pressure frame 7 is elastically connected to the mounting frame 4. The friction head 8 and the rotating roller 9 are both connected to the top pressure frame 7. The rotating roller 9 is always pressed against the coil wound on the reel 5 by the top pressure frame 7. As the coil on the reel 5 gradually decreases, the friction head 8 is gradually pressed against the pivot pin 6 by the top pressure frame 7.

[0019] In actual use, one of the turntables 2 is equipped with several guide wheels (not shown in the figure) corresponding to the spools 5. The steel wire on each spool 5 is straightened and passed through the turntable 2 and then wound around the corresponding guide wheel. The guide wheel enables the steel wires drawn from several spools 5 to gather towards the center of the turntable 2 and finally gather into a stranded wire wound on the take-up wheel (not shown in the figure). During operation, the drive spindle 1 drives two turntables 2 to rotate synchronously. The take-up reel rotates simultaneously with the turntables 2. During this process, single steel wires drawn from several spools 5 intertwine with each other through the rotation of the turntables 2 to form stranded wire. The take-up reel then winds up the stranded wire through rotation, ultimately completing the stranded wire manufacturing. The spools 5 output single steel wires through the driving force of the take-up reel. In actual operation, we found that in the initial stage of stranded wire manufacturing, the large diameter of the coil after multiple turns of a single steel wire results in a large overall weight of the spool 5. At this point, due to the friction between the multiple steel wires and the overall weight of the spool 5, the spool 5 will not rotate excessively due to the tension of the single steel wires. In other words, the steel wire currently being drawn from the spool 5 to the take-up reel remains taut. However, in the middle and later stages of stranded wire manufacturing, as single steel wires are continuously output from the spools 5, the overall weight of the spool 5 and the friction between the multiple steel wires gradually decrease. Therefore, as the take-up reel continues to rotate... During winding, the spool 5 may over-rotate due to the tension of a single steel wire, eventually causing the steel wire drawn from the spool 5 to become slack, affecting the quality of the stranded wire. Therefore, to solve this problem, a resistance-increasing mechanism is set up to prevent the spool 5 from over-rotating. The principle of the resistance-increasing mechanism is as follows: the rotating roller 9 is always pressed against the coil on the spool 5 by the top pressure frame 7. In the initial stage of stranded wire manufacturing, the rotating roller 9 plays an auxiliary braking role on the rotation of the spool 5, further preventing the single steel wire drawn from the spool 5 from becoming slack. In the middle and late stages of stranded wire manufacturing, as the coil diameter gradually decreases, the top pressure frame 7 will drive the friction head 8 to gradually approach the corresponding pivot pin 6. Finally, the friction head 8 pressed on the pivot pin 6 directly increases the rotational friction of the spool 5, effectively preventing the spool 5 from over-rotating and ensuring that the steel wire drawn from the spool 5 does not become slack. When all the single steel wires on the spool 5 have been output, the spool 5 can be quickly replaced through two sets of rotating connectors, further improving production efficiency.

[0020] refer to Figure 5 , Figure 6 and Figure 10 As shown, each rotating connector also includes a connecting plate 10, which is coaxially fixed to the end of the corresponding reel 5. The outer walls on both sides of the mounting bracket 4 are provided with guide sleeves 11 for the corresponding pivot pin 6 to pass through horizontally. Each pivot pin 6 has a multi-faceted insert 12 formed on one end of the end that passes through the guide sleeve 11. The multi-faceted insert 12 extends along the axial direction of the pivot pin 6. The connecting plate 10 has a slot 13 that is inserted and engaged with the multi-faceted insert 12.

[0021] When installing the pivot pin 6, first pull the pivot pin 6 outward, then place the spool 5 horizontally in the mounting bracket 4, and finally push the pivot pin 6 towards the spool 5. During the process of pushing the pivot pin 6 towards the spool 5, the multi-faceted insert 12 on the pivot pin 6 will be inserted into the slot 13 in the corresponding connecting plate 10. The spool 5 is connected to the pivot pin 6 through the cooperation of the multi-faceted insert 12 and the slot 13. Finally, the spool 5 will rotate through the two pivot pins 6.

[0022] refer to Figure 2 and Figure 3 As shown, a limiting frame 14 is fixedly provided on the outer walls of both sides of the mounting frame 4. Each limiting frame 14 is formed with a limiting sleeve 15 for the corresponding pivot pin 6 to pass through horizontally. Each pivot pin 6 is formed with a protruding ring 16. Each pivot pin 6 is fitted with a first spring 17, and the two ends of the first spring 17 abut against the limiting sleeve 15 and the protruding ring 16 respectively.

[0023] When installing the reel 5, pull the pivot pin 6 outward. After the reel 5 is placed in the mounting bracket 4, release the pivot pin 6. At this time, the first spring 17 releases its elastic force and drives the entire pivot pin 6 to extend towards the reel 5 through the contact ring 16. Finally, the reel 5 and the pivot pin 6 are connected by the cooperation of the multi-faceted insert 12 on the pivot pin 6 and the slot 13 on the fish connecting plate 10.

[0024] refer to Figure 2 and Figure 3 As shown, the bottom of the mounting bracket 4 is fixedly provided with a U-shaped bracket 18 located below one of the pivot pins 6. A horizontal plate 19 is formed on the U-shaped bracket 18. The top pressure frame 7 is located above the horizontal plate 19. The bottom of the top pressure frame 7 is formed with several vertically downward limiting rods 20 that pass through the horizontal plate 19. Each limiting rod 20 is fitted with a second spring 21, and the two ends of the second spring 21 abut against the horizontal plate 19 and the top pressure frame 7 respectively.

[0025] The top pressure frame 7 achieves sliding limit through several limiting rods 20 passing through the horizontal plate 19, ensuring that the top pressure frame 7 can only be raised and lowered. Since the horizontal plate 19 on the U-shaped bracket 18 is in a fixed state, several second springs 21 will drive the top pressure frame 7 to rise through their elastic force, ultimately realizing the top pressure frame 7's upward function.

[0026] refer to Figure 5 As shown, the top pressure frame 7 is U-shaped, and a support rod 22 parallel to the spool 5 is fixed on one of the vertical ends of the top pressure frame 7. The rotating roller 9 is hollow and is rotatably sleeved on the support rod 22. Annular limiting blocks 23 and limiting nuts 24 are fixed on the support rod 22 at both ends of the rotating roller 9.

[0027] The rotating roller 9 achieves its own rotation through the support rod 22. When the top pressure frame 7 drives the rotating roller 9 to press the coil inside the wire wheel 5 upward, the rotating roller 9 can rotate together with the rotating wheel to prevent the rotating roller 9 from continuously rubbing against the coil. The axial displacement of the rotating roller 9 is limited by the annular limit block 23 and the limit nut 24 to ensure that the rotating roller 9 can only rotate.

[0028] refer to Figure 3 and Figure 6 As shown, the friction head 8 includes a support base 25 and a semi-circular rubber strip 26. The support base 25 is fixedly connected to the other vertical end of the top pressure frame 7. The top of the support base 25 is formed with a semi-circular ring 27 with an opening facing the corresponding pivot pin 6. The semi-circular rubber strip 26 is fixedly embedded in the semi-circular ring 27, and the opening of the semi-circular rubber strip 26 faces the corresponding pivot pin 6.

[0029] As the top pressure frame 7 drives the friction head 8 to move toward the corresponding pivot pin 6, the support seat 25 will drive the semi-circular rubber strip 26 inside the semi-circular ring 27 to gradually approach the pivot pin 6. Eventually, the semi-circular rubber strip 26 will partially cover the outer wall of the pivot pin 6. At this time, the semi-circular rubber strip 26 increases the rotational friction of the pivot pin 6 to prevent the spool 5 from rotating excessively.

[0030] refer to Figure 2 and Figure 7 As shown, a central ring 28 is fixed on the mounting frame 4 at intervals from the spool 5. The axis of the central ring 28 is perpendicular to the axis of the spool 5, and the axis of the central ring 28 intersects the center of the axis of the spool 5. A single steel wire drawn from the spool 5 passes through the central ring 28.

[0031] In actual wire drawing, the single steel wire drawn from the spool 5 passes through the central ring 28. The central ring 28 prevents the single steel wire drawn to the take-up spool (not shown in the figure) from swinging left and right during the output process, and ultimately ensures that several single steel wires can stably twist together at the convergence position to form a strand.

[0032] refer to Figure 2 , Figure 7 and Figure 8 As shown, a correction ring 29 is provided between the central ring 28 and the spool 5. The axis of the correction ring 29 is perpendicular to the axis of the spool 5. Fixed sleeves 30 parallel to the spool 5 are formed on the inner walls of both sides of the mounting bracket 4. Two symmetrical sliding shafts 31 are formed on the outer wall of the correction ring 29. Each sliding shaft 31 is coaxially inserted into the corresponding fixed sleeve 30. Each fixed sleeve 30 is provided with a No. 3 spring 32 that pushes the sliding shaft 31 outward.

[0033] During actual wire feeding, the single steel wire drawn from the spool 5 passes through the correction ring 29 and then through the center ring 28. Because the spool 5 has a certain axial length, the single steel wire on the spool 5 will sway left and right during output. Although the center ring 28 can prevent the single steel wire from swaying left and right during final winding, it cannot control excessive swaying of the single steel wire at the point between the spool 5 and the center ring 28. Therefore, a correction ring 29 is set between the spool 5 and the center ring 28. The single steel wire will pass through the center ring 28 before... The correction ring 29, through the cooperation of the sliding shaft 31 and the fixed sleeve 30, can slide left and right. When a single steel wire swings left and right, the correction ring 29 will move along with the single steel wire. During this process, the correction rod will drive the corresponding sliding shaft 31 to compress the No. 3 spring 32. The No. 3 spring 32 will give the correction ring 29 a reverse force, which can effectively reduce the offset angle of the single steel wire towards the central ring 28, and further prevent the single steel wire located between the wire wheel 5 and the central ring 28 from swinging too much.

[0034] refer to Figure 5 and Figure 9 As shown, planar bearings 33 are embedded on the inner walls of both sides of the mounting frame 4. After the spool 5 is placed in the mounting frame 4, the connecting discs 10 at both ends of the spool 5 abut against the two planar bearings 33 respectively.

[0035] The axial displacement of the spool 5 is limited by the contact between the plane bearing 33 and the connecting plate 10 at the end of the spool 5. When the spool 5 rotates, the plane bearing 33 can also effectively prevent the connecting plate 10 at the end of the spool 5 from rubbing against the inner wall of the mounting bracket 4.

[0036] refer to Figure 5 As shown, a rubber sleeve 34 is fitted on the outer wall of the rotating roller 9.

[0037] When the rotating roller 9 presses against the coil inside the reel 5, the rubber sleeve 34 fitted on the rotating roller 9 prevents hard friction between the rotating roller 9 and the coil.

[0038] Working principle: During operation, the drive spindle 1 drives the turntable 2 to rotate, and the take-up wheel (not shown in the figure) rotates synchronously. The single steel wire output by the wire wheel 5 first passes through the guide ring 29 and the center ring 28 in sequence, and then gathers towards the center through the corresponding guide wheel (not shown in the figure) on the turntable 2. Finally, the rotation of the turntable 2 causes multiple steel wires to be wound into a strand, and at the same time, the take-up wheel (not shown in the figure) synchronously winds the strand into a strand. The top pressure frame 7 is lifted by the second spring 21. During this process, the rotating roller 9 located at one end of the top pressure frame 7 will always press on the coil inside the wire wheel 5. In the initial stage of stranding, the rotating roller 9 provides auxiliary braking to the wire wheel 5 to prevent the single steel wire from becoming loose during the output process. In the middle and late stages of stranding, the diameter of the coil inside the wire wheel 5 will gradually decrease. At this time, the top pressure frame 7 will drive the friction head 8 at its other end to press against the rotating pin 6, thereby increasing the rotational resistance of the rotating pin 6 and preventing the wire wheel 5 from rotating excessively, which would cause the single steel wire to become loose.

[0039] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment, characterized in that, The system includes a horizontally arranged drive spindle (1), on which are two turntables (2) spaced apart along their axial direction and coaxially fixed. Between the two turntables (2) are several sets of single-wire mounting mechanisms (3) arranged in a circular array. Each set of single-wire mounting mechanisms (3) includes a mounting frame (4) and a wire reel (5). The mounting frame (4) is connected to the two turntables (2), and the wire reel (5) is located inside the mounting frame (4). Between the wire reel (5) and the mounting frame (4) are two rotating connectors for quick replacement of the wire reel (5). Each rotating connector includes components capable of... A pivot pin (6) slides along the axial direction of the spool (5) and is inserted into its end. The mounting frame (4) is provided with a resistance increasing mechanism corresponding to one of the pivot pins (6). The resistance increasing mechanism includes a top pressure frame (7), a friction head (8), and a rotating roller (9). The top pressure frame (7) is elastically connected to the mounting frame (4). The friction head (8) and the rotating roller (9) are both connected to the top pressure frame (7). The rotating roller (9) is always pressed on the coil wound on the spool (5) by the top pressure frame (7). As the coil on the spool (5) gradually decreases, the friction head (8) will be gradually pressed on the pivot pin (6) by the top pressure frame (7).

2. The high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment according to claim 1, characterized in that, Each of the rotating connectors also includes a connecting plate (10), which is coaxially fixed to the end of the corresponding reel (5). The outer walls on both sides of the mounting bracket (4) are provided with guide sleeves (11) for the corresponding pivot pin (6) to pass through horizontally. Each pivot pin (6) has a multi-faceted insert (12) formed on one end of the end that passes through the guide sleeve (11). The multi-faceted insert (12) extends along the axial direction of the pivot pin (6). The connecting plate (10) is provided with a slot (13) for insertion and mating with the multi-faceted insert (12).

3. The high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment according to claim 1, characterized in that, Limiting frames (14) are fixedly provided on the outer walls of both sides of the mounting bracket (4). Each limiting frame (14) is formed with a limiting sleeve (15) for the corresponding pivot pin (6) to pass through horizontally. Each pivot pin (6) is formed with a protruding ring (16). Each pivot pin (6) is fitted with a first spring (17), and the two ends of the first spring (17) abut against the limiting sleeve (15) and the protruding ring (16) respectively.

4. The high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment according to claim 1, characterized in that, The bottom of the mounting bracket (4) is fixedly provided with a U-shaped bracket (18) located below one of the pivot pins (6). A horizontal plate (19) is formed on the U-shaped bracket (18). The top pressure bracket (7) is located above the horizontal plate (19). The bottom of the top pressure bracket (7) is formed with several vertically downward limiting rods (20) that pass through the horizontal plate (19). Each limiting rod (20) is fitted with a second spring (21), and the two ends of the second spring (21) abut against the horizontal plate (19) and the top pressure bracket (7) respectively.

5. The high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment according to claim 1, characterized in that, The top pressure frame (7) is U-shaped, and a support rod (22) parallel to the spool (5) is fixed on one of the vertical ends of the top pressure frame (7). The rotating roller (9) is hollow and is rotatably sleeved on the support rod (22). The support rod (22) is fixed with annular limiting blocks (23) and limiting nuts (24) located at both ends of the rotating roller (9).

6. The high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment according to claim 5, characterized in that, The friction head (8) includes a support base (25) and a semi-circular rubber strip (26). The support base (25) is fixedly connected to the other vertical end of the top pressure frame (7). The top of the support base (25) is formed with a semi-circular ring (27) with its opening facing the corresponding pivot pin (6). The semi-circular rubber strip (26) is fixedly embedded in the semi-circular ring (27), and the opening of the semi-circular rubber strip (26) faces the corresponding pivot pin (6).

7. The high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment according to claim 1, characterized in that, The mounting bracket (4) is fixed with a central ring (28) spaced apart from the spool (5). The axis of the central ring (28) is perpendicular to the axis of the spool (5), and the axis of the central ring (28) intersects the center of the axis of the spool (5). A single steel wire drawn from the spool (5) passes through the central ring (28).

8. The high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment according to claim 7, characterized in that, A correction ring (29) is provided between the central ring (28) and the spool (5). The axis of the correction ring (29) is perpendicular to the axis of the spool (5). Fixed sleeves (30) parallel to the spool (5) are formed on the inner walls of both sides of the mounting bracket (4). Two symmetrical sliding shafts (31) are formed on the outer wall of the correction ring (29). Each sliding shaft (31) is coaxially inserted into the corresponding fixed sleeve (30). Each fixed sleeve (30) is provided with a No. 3 spring (32) that pushes the sliding shaft (31) outward.

9. The high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment according to claim 2, characterized in that, The inner walls on both sides of the mounting frame (4) are fitted with plane bearings (33). After the spool (5) is placed in the mounting frame (4), the connecting discs (10) at both ends of the spool (5) abut against the two plane bearings (33) respectively.

10. The high-frequency, low-loss copper-clad steel electromagnetic shielding stranded wire manufacturing equipment according to claim 1, characterized in that, A rubber sleeve (34) is fitted on the outer wall of the roller (9).

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