A cable seamless wrapping forming device and a seamless cable manufacturing method

Abstract

The invention discloses a cable seamless wrapping forming device and a seamless cable manufacturing method, which relates to the technical field of cable winding equipment. The cable seamless wrapping forming device comprises an operating platform, the upper surface of the operating platform is rotatably provided with a driving turntable and a positioning disk, the interior of the operating platform is provided with a driving motor for driving the driving turntable, the driving turntable and the positioning disk are coaxially arranged, the upper surface of the positioning disk is coaxially rotatably connected with an unwinding shaft for unwinding polytetrafluoroethylene raw tape, the driving turntable is provided with a mounting plate, the mounting plate is provided with a calendering mechanism for extruding both sides of the polytetrafluoroethylene raw tape, the calendering mechanism extrude the polytetrafluoroethylene raw tape into a cross section that is thin on both sides and thick in the middle, and then winds it on the cable to achieve seamless wrapping. The invention has the function of realizing continuous production of seamless wrapped cables.

Description

Technical Field

[0001] The invention relates to the technical field of wire and cable manufacturing and processing, and in particular to a cable seamless wrapping molding device and a seamless cable manufacturing method. Background Art

[0002] With the rapid development of aviation industry, higher requirements are put forward for the performance and reliability of cables. At present, there are mainly extruded aviation cables represented by cross-linked ethylene-tetrafluoroethylene and wrapped aviation cables represented by polyimide composite film and polytetrafluoroethylene wrapped wire. These are the two mainstream high-temperature wires for aerospace. Among the same type of specifications, the polyimide composite film and polytetrafluoroethylene combined insulated wrapped wire has lighter weight and higher reliability performance than the other product.

[0003] The composite insulation wrapped wire of polyimide composite film and polytetrafluoroethylene is divided into two types: ordinary wrapping and seamless wrapping. Seamless wrapping mainly improves the smoothness of the product appearance on the basis of ordinary wrapping, and improves the overall hydrolysis resistance and wear resistance of the product. However, according to the product standard, the overlap rate of the inner and outer wrapping tapes must meet 50.5% to 54%, and the inner and outer wrapping directions must be opposite. Therefore, during the wrapping process, the inner and outer layers of the cable will inevitably produce steps at the wrapping edges, resulting in gaps between the insulation layers. If the inner layer of the PI composite film is in a humid environment for a long time, there will be a risk of cracks and micropores after the material is hydrolyzed, and the leakage current of the cable will also increase. The existence of the Joule heat effect will aggravate the hydrolysis reaction and the insulation will become brittle due to thermal aging, and the fine lines and cracks will continue to increase. In severe cases, local discharge will occur, causing more serious safety accidents.

[0004] The cross-section of a normal PTFE wrapping tape is a rectangle. If the overlap of the wrapping tape during the production process is 50%, the product appearance can achieve a certain degree of smoothness. At this time, the thickness of the insulating layer can be considered to be the thickness of the wrapping tape multiplied by 2. If the overlap rate of the wrapping tape reaches 50.5% to 54%, the appearance will be rough and have obvious steps. The 50.5% to 54% overlap area is actually the thickness of the wrapping tape multiplied by 3. The product standard clearly stipulates that the overlap rate of the wrapping tape must meet the requirements of 50.5% to 54%, and the product appearance must meet the relevant standards and achieve smoothness.

[0005] At present, the common practice in the existing technology is to use special-shaped polytetrafluoroethylene raw tape for winding and coating. The cross-section of the special-shaped polytetrafluoroethylene raw tape is basically thick in the middle, and the two ends of the film are thinned into a V shape, which can improve the smoothness of the cable surface and realize the production of seamless winding wire. However, this will have a disadvantage. After the polytetrafluoroethylene raw tape is processed, it will be very difficult to roll the film because it is thick in the middle and thin at both ends. Because the thickness of the treated film is uneven, whether the film is rolled up or unwound, it needs to pass through multiple guide wheels repeatedly, which will cause the film material to be subjected to inconsistent force, which will cause the thinner ends to easily warp, deform or break. In addition, the thinner edge part after treatment is wavy, which causes poor appearance in the cable production process, causing warping problems at the overlapping parts of the wrapping tape, causing quality problems. This is not allowed in the product production process. At this stage, polytetrafluoroethylene heterosexual film molding and cable insulation coating are two production processes. The packaging and turnover of special-shaped film raw materials will have a certain impact on the production quality of the subsequent process products.

[0006] In addition, during the wrapping production process, the special-shaped polytetrafluoroethylene raw tape can solve the problem of steps and gaps generated in the overlapping areas of the outer wrapping to a certain extent, making the outer surface of the cable very smooth. However, steps will still be generated at the overlapping areas of the inner polyimide composite film. The adjacent wrapping directions between the insulating layers are opposite, and gaps between the insulating layers are inevitable. Since the cables work in a humid environment for a long time, there are certain safety hazards to cable products. It is very necessary to provide a technical solution to the above technical problems. Summary of the invention

[0007] The present application discloses a cable seamless wrapping forming device and a seamless cable manufacturing method, which ensures that the polytetrafluoroethylene raw tape can be used to wrap the cable after being processed on the wrapping production equipment, and ensures that the outermost insulation layer of the cable produced by continuous wrapping has a seamless and smooth effect.

[0008] The present application provides a seamless cable wrapping device and a wrapping method, which adopt the following technical solutions:

[0009] A seamless cable wrapping device and a wrapping method, wherein the seamless cable wrapping device comprises an operating platform and a wrapping rotating and pressing device, wherein a driving turntable and a positioning disk are rotatably provided on the upper surface of the operating platform, a driving motor for driving the driving turntable is provided inside the operating platform, the driving turntable and the positioning disk are coaxially arranged, an unwinding shaft for unwinding a polytetrafluoroethylene raw tape is coaxially rotatably connected to the upper surface of the positioning disk, and a mounting plate is provided on the driving turntable;

[0010] The mounting plate is provided with a calendering mechanism for extruding both sides of the polytetrafluoroethylene raw tape, the calendering mechanism includes at least two driven shafts and a driving shaft, the driven shaft is provided with a driven wheel, the driving shaft is provided with a driving wheel, the middle part of the driven wheel is retracted to form a recessed part, the driving wheel has a protrusion that matches the recessed part, the polytetrafluoroethylene raw tape passes through the recessed part on the driven wheel from the unwinding shaft, the protrusion abuts against the recessed part, the two ends of the protrusion abut against the two ends of the recessed part correspondingly, and at the same time, the middle part of the protrusion is spaced from the middle part of the recessed part to form a receiving part, which is used to extrude both sides of the polytetrafluoroethylene raw tape.

[0011] By adopting the above technical solution, the polytetrafluoroethylene raw tape on the unwinding shaft is inserted into the calendering mechanism and located in the concave part of the driven wheel, and then the two ends of the raised part on the driving wheel are pressed against the two ends corresponding to the concave part, that is, the two sides of the polytetrafluoroethylene raw tape are pressed, and the middle part of the polytetrafluoroethylene raw tape is located in the accommodating part, so that the two sides of the polytetrafluoroethylene raw tape in the concave part of the driven wheel are pressed against each other, and the cross section of the polytetrafluoroethylene raw tape formed after the pressing is thick in the middle and thin on both sides. After the extruded polytetrafluoroethylene raw tape is wound on the cable, the thin side of the polytetrafluoroethylene raw tape of the latter circle overlaps on the thin side of the polytetrafluoroethylene raw tape of the previous circle, and the two thin surface layers overlap and are flush with the middle thick part of the polytetrafluoroethylene raw tape, which solves the problem that the overlapping position of the wrapping tape and the wrapping tape is not smooth due to the thickness of the wrapping tape itself, so that the surface of the entire cable is smooth, thereby playing the role of seamless wrapping cable, thereby improving the appearance quality of the cable.

[0012] Preferably, the recessed portion is located in the middle of the driven wheel, and the cross-section of the driven wheel is I-shaped; the driving wheel gradually retracts from its two ends to the middle, and the raised portion is the end of the driving wheel; the driven wheel abuts against the driving wheel, and the raised portion abuts against the recessed portion.

[0013] By adopting the above technical solution, the polytetrafluoroethylene raw tape is inserted between the driving wheel and the driven wheel, the middle part of the polytetrafluoroethylene raw tape is located in the accommodating part, and the two sides of the polytetrafluoroethylene raw tape are formed by correspondingly extruding the upper and lower ends of the recessed part and the upper and lower ends of the raised part to form a polytetrafluoroethylene raw tape that is thick in the middle and thin on both sides.

[0014] Preferably, the driving turntable is also provided with a tension adjustment mechanism, and the tension adjustment mechanism includes a reversing rod, a rocker rod and a positioning rod all vertically arranged on the driving turntable, the positioning rod is provided with a positioning wheel, the driving turntable is provided with an arc guide groove, and the rocker rod is located in the guide groove; the driving turntable is also provided with a tension control motor for driving the rocker rod to move along the guide groove, and the mounting plate is also provided with a calendering drive motor for driving the driving wheel to rotate, and the tension control motor is linked to the calendering drive motor.

[0015] By adopting the above technical scheme, the tension adjustment mechanism can adjust the polytetrafluoroethylene raw tape to maintain a straightened state when entering the calendering mechanism, thereby improving the calendering accuracy of the polytetrafluoroethylene raw tape. The calendering drive motor drives the active wheel to rotate, so that the polytetrafluoroethylene raw tape is transmitted through the active wheel while the polytetrafluoroethylene raw tape is being calendered, thereby ensuring the continuous wrapping of the polytetrafluoroethylene raw tape around the cable.

[0016] Preferably, the two ends of the recessed portion are two annular grooves spaced apart on the driven wheel, and the raised portion is two annular pressure rings spaced apart on the driving wheel, the raised portion abuts against the recessed portion, and the annular pressure ring is pressed in the annular groove, and the polytetrafluoroethylene raw tape is located in the recessed portion after entering the calendering mechanism, and the two annular pressure rings squeeze the two sides of the polytetrafluoroethylene raw tape into the annular grooves, and squeeze the two sides of the polytetrafluoroethylene raw tape to form a polytetrafluoroethylene raw tape that is thick in the middle and thin on both sides, a first inclined surface is provided on the recessed portion of the driven wheel, and a second inclined surface matching the first inclined surface is provided on the outer ring of the annular pressure ring.

[0017] By adopting the above technical solution, the first inclined surface on the recessed portion and the second inclined surface on the outer ring of the annular pressure ring are matched, which can increase the extrusion force and further enhance the compression effect on the polytetrafluoroethylene raw tape; this helps to ensure the tightness between the polytetrafluoroethylene raw tape and the unwinding shaft to avoid loosening or slipping.

[0018] Preferably, a special-shaped groove is provided on the upper surface of the mounting plate, and the special-shaped groove is located between the driven shaft and the driving shaft. A slider is provided at the bottom of the driving shaft, and the slider is slidably arranged inside the special-shaped groove. A locking bolt is provided inside the slider, and the slider is locked in the special-shaped groove of the mounting plate by the locking bolt.

[0019] By adopting the above technical solution, the distance between the driving wheel and the driven wheel is adjusted by sliding the slider in the special-shaped groove and locking the slider in the special-shaped groove of the mounting plate by the locking bolt. On the one hand, the tension of the polytetrafluoroethylene raw belt is adjusted. Appropriate tension can ensure the normal operation of the polytetrafluoroethylene raw belt in the transmission device, avoid slipping or skidding, and improve the reliability and stability of the transmission.

[0020] Preferably, the special-shaped groove includes a first guide portion, a second guide portion and a third guide portion, the first guide portion, the second guide portion and the third guide portion are interconnected, the end of the second guide portion is toward the central axis position of the driven shaft, and the end of the third guide portion is toward between two adjacent driven shafts.

[0021] By adopting the above technical solution, when the end of the second guide portion is toward the central axis position of the driven shaft, the driving shaft moves toward the driven shaft until the driving wheel and the driven wheel are against each other and the two sides of the polytetrafluoroethylene raw tape are squeezed, the extrusion force can control the deformation of the polytetrafluoroethylene raw tape and reduce the bending and jumping of the polytetrafluoroethylene raw tape; this helps to maintain the extrusion molding effect of the polytetrafluoroethylene raw tape; appropriate extrusion force can keep the polytetrafluoroethylene raw tape in a stable state of motion and reduce the swing and shaking of the polytetrafluoroethylene raw tape; this helps to improve the reliability and stability of the polytetrafluoroethylene raw tape and reduce the risk of failure and shutdown; when the end of the third guide portion is toward between two adjacent driven shafts, it is used to adjust the tension of the polytetrafluoroethylene raw tape.

[0022] Preferably, at least two support columns are provided on the driving turntable, the bottom of the support column is fixedly connected to the upper surface of the driving turntable, the top of the support column is provided with a positioning ring, the positioning ring is provided with a mounting plate, and the mounting plate is rotatably provided with a first steering wheel.

[0023] By adopting the above technical scheme, installing the vertical plate and the first steering wheel can ensure that the polytetrafluoroethylene raw belt maintains stable guidance during movement; they help guide the polytetrafluoroethylene raw belt to run along a predetermined path, reduce deviation and shaking, and ensure normal contact between the polytetrafluoroethylene raw belt and the transmission device; the first steering wheel can effectively prevent the polytetrafluoroethylene raw belt from drifting sideways, that is, deviating from the track or jumping during transmission; they guide the polytetrafluoroethylene raw belt to the correct position, so that it keeps running on the correct track, thereby reducing the risk of deviation of the polytetrafluoroethylene raw belt.

[0024] Preferably, the support column is provided with a plurality of mounting members, and a second steering wheel is rotatably provided on the mounting members.

[0025] By adopting the above technical solutions, the correct installation and adjustment of the second steering wheel can reduce the friction and loss between the polytetrafluoroethylene raw belt and the transmission device; they help to maintain the appropriate angle and pressure of the polytetrafluoroethylene raw belt in contact with the steering wheel, reducing energy loss and polytetrafluoroethylene raw belt wear.

[0026] Preferably, at least two sets of tensioning assemblies are provided between the driving turntable and the positioning collar, and the tensioning assemblies include a plurality of limiting shafts rotatably arranged on the positioning collar, and limiting sleeves are provided on the limiting shafts.

[0027] By adopting the above technical solution, through the setting of the limit shaft and the limit sleeve, an appropriate tension balance can be maintained between the driving turntable and the positioning sleeve ring; this helps to ensure the stable tension of the polytetrafluoroethylene raw belt during the transmission process, avoid over-tightening or over-loosening, and thus reduce the wear and damage of the polytetrafluoroethylene raw belt; the presence of the tensioning assembly can buffer the vibration and impact generated during transmission; the limit sleeve and other components reduce the impact on the polytetrafluoroethylene raw belt by absorbing and dispersing the impact force and vibration of the transmission system, thereby improving the stability and reliability of the transmission system.

[0028] Preferably, the wrapping rotation and pressing device includes three wrapping rods located at the top of the unwinding shaft, the three wrapping rods are arranged obliquely, and the three wrapping rods are staggered and gathered to form an intersection for the cable to pass through, and a center hole is formed in the intersection.

[0029] By adopting the above technical scheme, three inclined wrapping rods are staggered to form an intersection, which provides better guidance for the winding of polytetrafluoroethylene raw tape, so that the raw tape can be layered and wound on the cable surface at a suitable angle. The existence of the center hole allows the cable to pass through the intersection, which is convenient for winding the raw tape onto the cable without affecting the smoothness of the winding process. When the edge of the calendered wrapping tape has a slight edge warping, since the wrapping device is in the same direction as the wrapping direction, it can well assist the edge of the thinner polytetrafluoroethylene film in the calendered area to better fit the surface without warping, making the cable wrapping surface smoother and the cable appearance seamless. Through the extrusion guiding effect of the external force rotation of the wrapping rod, the gap between the wrapping tape layers can be filled by extrusion, which can effectively solve the problem of insulation layer gap and improve product quality and performance.

[0030] Preferably, the wrapping method of the seamless wrapped cable wrapping device comprises the following steps:

[0031] S1: The unwinding shaft is positioned and installed on the positioning disk, the polytetrafluoroethylene raw tape is evenly wound on the unwinding shaft, and one end of the polytetrafluoroethylene raw tape is fixedly connected to the unwinding shaft, and the other end of the polytetrafluoroethylene raw tape passes through the calendering mechanism from the unwinding disk and then is wound on the cable surface;

[0032] S2: driving the driving wheel and the driven wheel to abut against each other until the two sides of the polytetrafluoroethylene raw tape in the concave part of the driven wheel abut against the convex part of the driving wheel respectively, so as to press the two sides of the polytetrafluoroethylene raw tape to obtain a polytetrafluoroethylene raw tape with a thick middle and thin sides, and then fixing the relative positions of the driving wheel and the driven wheel;

[0033] S3: The polytetrafluoroethylene raw tape formed after calendering and having a thick middle and thin sides is passed through the three wrapping rods in the wrapping rotating and pressing device, and the intersection of the wrapping tape is the wrapping point of the wrapping tape. The diameter of the center hole of the intersection is the diameter of the cable after wrapping. The center hole at the intersection through which the cable passes, the limitation of the size of the center hole and the extrusion and guiding effect of the wrapping rods make the calendered polytetrafluoroethylene raw tape tightly wrap around the outer surface of the cable, so as to reduce the air between the polytetrafluoroethylene raw tape layers during the wrapping process;

[0034] S4: driving the driving turntable to rotate, the polytetrafluoroethylene raw tape is evenly wound on the surface of the cable in the winding rotating and pressing device, and the two adjacent layers of polytetrafluoroethylene raw tapes wound on the surface of the cable are overlapped end to end in sequence, and the overlapping parts of the polytetrafluoroethylene raw tapes are all polytetrafluoroethylene raw tapes with thinner cross-sections, which are used to achieve continuous winding of the cable.

[0035] By adopting the above technical scheme, after the polytetrafluoroethylene raw tape is unwound from the unwinding shaft, it passes between the recessed part and the raised part of the calendering mechanism and is finally wrapped around the surface of the cable; then the raised part of the driving wheel and the recessed part of the driven wheel are driven to fit and press the two sides of the polytetrafluoroethylene raw tape to form a polytetrafluoroethylene raw tape that is thick in the middle and thin on both sides; finally, the driving turntable is rotated, the mechanism on the driving turntable is driven to rotate as a whole, the polytetrafluoroethylene raw tape rotates relative to the cable, and the polytetrafluoroethylene raw tape is driven to be wrapped around the cable to achieve the polytetrafluoroethylene raw tape. The material tape is evenly wrapped on the cable surface. Before the polytetrafluoroethylene raw tape is wrapped on the cable, the guidance of the three wrapping rods can well assist the thinner polytetrafluoroethylene film edges in the calendered area to better fit the surface without warping, making the cable wrapping surface smoother and the cable appearance seamless. The extrusion guiding effect of the external force rotation of the wrapping rod can fill the gap between the wrapping tape layers through extrusion, which can effectively solve the problem of insulation layer gaps and improve product quality and performance.

[0036] In summary, this application has the following beneficial effects:

[0037] 1. The seamless cable wrapping device passes the polytetrafluoroethylene raw tape through the recessed portion of the driven wheel, so that the two sides of the polytetrafluoroethylene raw tape in the recessed portion of the driven wheel are respectively against the corresponding raised portions on the driving wheel. After being squeezed at both ends of the raised portions, the cross-section of the polytetrafluoroethylene raw tape is thick in the middle and thin on both sides. The extruded polytetrafluoroethylene raw tape is then wrapped around the cable insulation layer. Since the polytetrafluoroethylene film after being compressed is thick in the middle and thin on both sides, it can avoid film breakage or obvious wave patterns of the product due to uneven force, thereby reducing the damage to the edge of the film caused by multiple packaging and turnover of the compressed polytetrafluoroethylene film, and greatly reducing the probability of wave patterns and unevenness at the edge of the film. After winding on the cable, the thin side of the last circle of polytetrafluoroethylene raw tape overlaps on the previous circle of polytetrafluoroethylene raw tape, and the overlap rate is 50.5% to 54%. The cross section of the polytetrafluoroethylene raw tape is in a trapezoidal shape, so the polytetrafluoroethylene raw tape in the overlapping area will not produce steps, thereby realizing the continuous production of seamless wrapped cables;

[0038] 2. The wrapping method of the seamless cable wrapping device is as follows: after the polytetrafluoroethylene raw tape is wound off the unwinding shaft, it enters the calendering mechanism, and the two sides of the polytetrafluoroethylene raw tape are correspondingly pressed by the protruding part of the driving wheel and the recessed part of the driven wheel to form a polytetrafluoroethylene raw tape that is thick in the middle and thin on both sides; finally, the calendered polytetrafluoroethylene raw tape that is thin on both sides and thick in the middle is wound on the cable, and before the polytetrafluoroethylene raw tape is wrapped around the cable, it is guided by three wrapping rods to assist the edges of the thinner polytetrafluoroethylene film in the calendered area to better fit the surface without warping, so that the cable wrapping surface is smoother and the cable appearance achieves a seamless effect, and the extrusion force of the external force of the wrapping rod can fill the gap between the wrapping layers by extrusion, which can effectively solve the problem of insulation layer gap and improve product quality and performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic diagram of the overall structure of the seamless cable wrapping device in Example 1;

[0040] Figure 2 yes Figure 1 The enlarged structural diagram of part A in the middle;

[0041] Figure 3 is a schematic diagram of the structure when the driven wheel and the driving wheel are fitted together in Example 1;

[0042] Figure 4 Schematic diagram of the wrapping direction of the seamless wrapped cable wrapping device in Example 1;

[0043] Figure 5Schematic diagram of the connection structure between the tape wrapping rod and the unwinding shaft in this embodiment;

[0044] Figure 6 Schematic diagram of the overall structure of the seamless cable wrapping device in this embodiment 2;

[0045] Figure 7 Schematic diagram of the overall structure of the tensioning assembly in this embodiment 2;

[0046] Figure 8 Schematic diagram of the extruded overall structure between the driven wheel and the driving wheel in this embodiment 2;

[0047] Fig. 9 Schematic diagram of the internal structure of the special-shaped groove in this embodiment 2.

[0048] Description of the accompanying drawings: 1. operating platform; 2. driving turntable; 3. positioning disk; 4. unwinding shaft; 5. mounting plate; 6. driven shaft; 7. driving shaft; 8. driven wheel; 9. driving wheel; 10. recessed portion; 101. annular groove; 11. annular pressure ring; 12. supporting column; 13. positioning collar; 14. mounting plate; 15. first steering wheel; 16. mounting member; 17. second steering wheel; 18. Y-shaped mounting frame; 19. concave fixing plate; 20. third steering wheel; 21. tensioning assembly; 2101 , limit shaft; 2102, limit sleeve; 22, first inclined plane; 23, second inclined plane; 26, special-shaped groove; 2601, first guide part; 2602, second guide part; 2603, third guide part; 27, slider; 28, locking bolt; 29, wrapping rod; 30, wrapping rotation and pressing device; 50, calendering mechanism; 51, raised part; 52, accommodating part; 60, tension adjustment mechanism; 61, reversing rod; 62, rocker rod; 63, positioning rod; 64, positioning wheel; 65, guide groove; 66, cross bar. DETAILED DESCRIPTION

[0049] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content. Example 1

[0050] The present invention discloses a seamless cable wrapping device and a wrapping method. Figure 1As shown, the seamless cable wrapping device includes an operating platform 1 and a wrapping rotation and pressing device 30. A driving turntable 2 and a positioning disk 3 are rotatably provided on the upper surface of the operating platform 1. A driving motor for driving the driving turntable 2 is provided inside the operating platform 1. The driving turntable 2 and the positioning disk 3 are coaxially arranged. A unwinding shaft 4 for unwinding a polytetrafluoroethylene raw tape is coaxially rotatably connected to the upper surface of the positioning disk 3. A mounting plate 5 is provided on the driving turntable 2. A calendering mechanism 50 for extruding both sides of the polytetrafluoroethylene raw tape is provided on the mounting plate 5. The polytetrafluoroethylene raw tape is unwound through the unwinding shaft 4 and enters the calendering mechanism 50 for calendering and forming. Then, the polytetrafluoroethylene raw tape is wrapped around the cable and rolled up through the wrapping rotation and pressing device 30.

[0051] like Figure 2 and Figure 3 As shown, in this embodiment, the calendering mechanism 50 includes two driven shafts 6 and one driving shaft 7. The driven shaft 6 is provided with a driven wheel 8, and the driving shaft 7 is provided with a driving wheel 9. The middle part of the driven wheel 8 is retracted to form a recessed portion 10, and the driving wheel 9 has a raised portion 51 that matches the recessed portion 10. Specifically, the recessed portion 10 is located in the middle part of the driven wheel 8 and is formed by the driven wheel 8 being retracted from the outside to the inside, that is, the cross section of the driven wheel 8 is an I-shaped; the driving wheel 9 is gradually retracted from its upper and lower ends to the middle part, and the raised portion 51 is located at the upper and lower ends of the driving wheel 9. After the driving wheel 9 and the driven wheel 8 are attached, the raised portion 51 abuts against the recessed portion 10, and a receiving portion 52 for extruding the polytetrafluoroethylene raw tape is formed between the driving wheel 9 and the driven wheel 8, and the cross section of the receiving portion 52 is roughly trapezoidal.

[0052] When the polytetrafluoroethylene raw tape passes through the recessed portion 10 on the driven wheel 8 from the unwinding shaft 4, the raised portion 51 abuts against the recessed portion 10, and the upper and lower ends of the raised portion 51 abut against the upper and lower ends of the recessed portion 10, so that the two sides of the polytetrafluoroethylene raw tape can be squeezed and thinned. At the same time, the middle part of the raised portion 51 is spaced from the middle part of the recessed portion 10, that is, after the driving wheel 9 and the driven wheel 8 are tightly abutted, the accommodating portion 52 formed between the raised portion 51 and the recessed portion 10 ensures that the polytetrafluoroethylene raw tape is located between the recessed portion 10 and the raised portion 51, so that the middle part of the polytetrafluoroethylene raw tape can be located in the accommodating portion 52, and the two sides of the polytetrafluoroethylene raw tape are abutted and squeezed by the recessed portion 10 and the raised portion 51, so that the polytetrafluoroethylene raw tape with an original rectangular cross-section can be formed into a trapezoidal cross-section with thin sides and thick middle after extrusion.

[0053] like Figure 1 and Figure 4As shown, in this embodiment, the driving turntable 2 is also provided with a tension adjustment mechanism 60, which includes a reversing rod 61, a swing rod 62 and a positioning rod 63, which are all vertically arranged on the driving turntable 2. Two reversing rods 61 are provided and are both arranged close to the unwinding shaft 4; a positioning wheel 64 is provided on the positioning rod 63, and the positioning rod 63 is close to one side of the calendering mechanism 50, and the positioning wheel 64 on the positioning rod 63 is at approximately the same level as the driven wheel 8 and the driving wheel 9. In addition, a positioning rod 63 is also provided on the other side close to the calendering mechanism 50, and the positioning wheel 64 is provided on the positioning rod 63 at approximately the same level as the driven wheel 8 and the driving wheel 9, so that the polytetrafluoroethylene raw tape is at the same level when entering and exiting the calendering mechanism 50, without tilting, thereby ensuring the precision of extrusion of the polytetrafluoroethylene raw tape on both sides.

[0054] Furthermore, the driving turntable 2 is provided with an arc-shaped guide groove 65, and the swing rod 62 is located in the guide groove 65. The driving turntable 2 is also provided with a tension control motor (not shown in the figure) for driving the swing rod 62 to move along the guide groove 65. The tension control motor is located below the driving turntable 2. The driving shaft of the tension control motor is connected to the bottom of the swing rod 62 through a cross bar 66. The rotation of the tension control motor drives the cross bar 66 to rotate synchronously, so that the swing rod 62 swings in the guide groove 65. After the polytetrafluoroethylene raw tape enters the tension adjustment mechanism 60 from the unwinding shaft 4, it bypasses one of the reversing rods 61, the swing rod 62, the other reversing rod 61 and the positioning wheel 64 on the positioning rod 63 in sequence, and then enters the calendering mechanism 50. By adjusting the rotation angle of the swing rod 62, the tension of the polytetrafluoroethylene raw tape passing through the positioning wheel 64 and then entering the calendering mechanism 50 is adjusted, so that the polytetrafluoroethylene raw tape entering the calendering mechanism 50 is conveniently extruded on both sides.

[0055] The mounting plate 5 is also provided with a calendering drive motor that drives the driving wheel 9 to rotate. The driving wheel 9 is fixed on the driving shaft 7. The calendering drive motor drives the driving shaft 7 to rotate, and then drives the driving wheel 9 to rotate. Therefore, during the rotation of the driving wheel 9, the polytetrafluoroethylene raw tape can be stably transmitted through the driving wheel 9 while being calendered, ensuring that the polytetrafluoroethylene raw tape after calendering is continuously wrapped around the cable. The tension control motor is linked with the calendering drive motor, and the tension of the polytetrafluoroethylene raw tape during feeding can be adjusted by adjusting the tension adjustment mechanism according to the extrusion molding of the polytetrafluoroethylene raw tape by the calendering mechanism and the speed of feeding. At the same time, during the calendering transmission process of the polytetrafluoroethylene raw tape, the calendering mechanism 50 can maintain a uniform speed through the tension adjustment mechanism 60, and no blocking problem occurs. Among them, the tension control motor is linked with the calendering drive motor, which is realized by existing conventional technical means, which is not the invention point of this application and will not be repeated here.

[0056] In this embodiment, a plurality of mounting holes are provided on the mounting plate 5, and the driven shaft 6 can be detachably mounted on the mounting plate 5. The spacing between the driven wheel 8 and the driving wheel 9 can be adjusted by adjusting the mounting position of the driven shaft 6 as needed, thereby facilitating the calendering of the polytetrafluoroethylene raw tape.

[0057] like Figure 5 As shown, in the present embodiment, the wrapping rotating and pressing device 30 includes a wrapping rod 29 fixedly installed on the top of the unwinding shaft 4, and three wrapping rods 29 are fixedly installed. The three wrapping rods 29 are inclined, and the three wrapping rods 29 are staggered and gathered to form an intersection for the cable to pass through, and a center hole is formed in the intersection. The diameter of the center hole of the intersection is the diameter of the cable after wrapping, and the intersection of the three wrapping rods is used as the wrapping point for wrapping the wrapping tape. The limitation of the center hole size and the extrusion and guiding effect of the wrapping rod 29 make the polytetrafluoroethylene raw tape tightly wrap around the outer surface of the cable, so as to reduce the air between the polytetrafluoroethylene raw tape layers during the wrapping process.

[0058] Since the inner and outer wrapping tapes are wrapped in opposite directions, the excess overlap of the wrapping tapes "50.5% to 54%" will inevitably cause gap problems between layers. Since the surface of the polytetrafluoroethylene raw tape is relatively soft, the gaps between the wrapping tape layers can be filled by extrusion through the external force of the wrapping rod 29, which can effectively solve the gap problem in the insulation layer and improve product quality and performance.

[0059] like Figure 4 As shown, the wrapping method of the seamless cable wrapping device in this embodiment includes the following steps:

[0060] S1: The unwinding shaft 4 is positioned and installed on the positioning disk 3, the polytetrafluoroethylene raw tape is evenly wound on the unwinding shaft 4, and one end of the polytetrafluoroethylene raw tape is fixedly connected to the unwinding shaft 4, and the other end of the polytetrafluoroethylene raw tape alternately passes through the outer surface of a reversing rod 61, the outer surface of the swing rod 62, the outer surface of another reversing rod 61, and the outer surface of the positioning wheel 64 in sequence, enters the calendering mechanism 50, and is located between the recessed portion 10 and the raised portion 51, passes through the calendering mechanism 50, passes through the outer surface of another positioning wheel 64, and is finally fixed on the cable surface in the wrapping rotating and pressing device 30;

[0061] S2: driving the driving wheel 9 and the driven wheel 8 to abut against each other, until the two sides of the polytetrafluoroethylene raw tape in the recessed portion 10 of the driven wheel 8 abut against the raised portion 51 on the driving wheel 9, respectively, to press the two sides of the polytetrafluoroethylene raw tape to obtain a polytetrafluoroethylene raw tape with a thick middle and thin sides;

[0062] S3: Adjust the position of the swing rod 62 to ensure the tension of the polytetrafluoroethylene raw tape entering the calendering mechanism 50, then start the power supply of the calendering drive motor to rotate the driving wheel 9, start to extrude the polytetrafluoroethylene raw tape in the calendering mechanism 50 on both sides, and feed the calendered polytetrafluoroethylene raw tape at the same time, through the intersection of the three wrapping rods 29 in the wrapping rotation and pressing device 30 as the wrapping point of the wrapping tape, the diameter of the center hole of the intersection is the diameter of the cable after wrapping, the center hole at the intersection through which the cable passes, the limitation of the size of the center hole and the extrusion and guiding effect of the wrapping rod 29, so that the polytetrafluoroethylene raw tape is tightly wrapped on the outer surface of the cable, which is used to reduce the air between the polytetrafluoroethylene raw tape layers during the wrapping process;

[0063] S4: driving the driving turntable 2 to rotate, so that the mechanisms on the driving turntable 2 drive the polytetrafluoroethylene raw tape to rotate relative to the cable, so that the polytetrafluoroethylene raw tape is evenly wound on the surface of the cable, which is used to wrap the cable; the two adjacent layers of polytetrafluoroethylene raw tape wound on the surface of the cable are overlapped head to tail, that is, the thin side of the polytetrafluoroethylene raw tape of the latter circle overlaps on the polytetrafluoroethylene raw tape of the previous circle, and the overlapping parts of the polytetrafluoroethylene raw tape are all polytetrafluoroethylene raw tapes with thinner cross-sections, which are used to realize continuous wrapping of the cable. The polytetrafluoroethylene raw tape in the overlapping area will not produce steps, and the continuous production of seamless wrapped cables can be realized. Example 2

[0064] Compared with Example 1, the main difference between Example 2 and Example 1 lies in the calendering mechanism and the tensioning mechanism.

[0065] like Figure 6 and Figure 8 As shown, in this embodiment, the two ends of the recessed portion 10 in the calendering mechanism 50 are two annular grooves 101 spaced apart on the driven wheel 8, and the raised portion 51 is two annular pressure rings 11 spaced apart on the driving wheel 9, the raised portion 51 abuts against the recessed portion 10, and the annular pressure ring 11 is pressed against the annular groove 101.

[0066] At least two driven shafts 6 and a driving shaft 7 are provided on the mounting plate 5, a driven wheel 8 is provided on the driven shaft 6, a driving wheel 9 is provided on the driving shaft 7, the middle part of the driven wheel 8 is retracted to form a recessed portion 10, the polytetrafluoroethylene raw tape is evenly wound on the unwinding shaft 4, and one end of the polytetrafluoroethylene raw tape is fixedly connected to the unwinding shaft 4, and the other end of the polytetrafluoroethylene raw tape alternately passes through the recessed portion 10 on the driven wheel 8, and two annular pressure rings 11 are provided on the driving wheel 9, and the outer ring of the annular pressure ring 11 is against the recessed portion 10 of the driven wheel 8 , used to extrude both sides of the polytetrafluoroethylene raw tape; by passing the polytetrafluoroethylene raw tape through the recessed portion 10 of the driven wheel 8, the two sides of the polytetrafluoroethylene raw tape in the recessed portion 10 of the driven wheel 8 are respectively abutted against the two annular pressure rings 11 on the driving wheel 9; after being extruded by the annular pressure rings 11, the cross-section of the polytetrafluoroethylene raw tape is thick in the middle and thin on both sides, and after the extruded polytetrafluoroethylene raw tape is wound on the cable, the thin side of the latter circle of polytetrafluoroethylene raw tape overlaps the previous circle of polytetrafluoroethylene raw tape On the thin side, the two thin surface layers overlap and are flush with the middle thick part of the polytetrafluoroethylene raw tape; the problem of unevenness caused by the steps formed at the overlapping position of the wrapping tape due to the thickness of the wrapping tape itself is solved, so that the surface of the entire cable is smooth, thereby playing the role of seamless wrapping cable, thereby improving the appearance quality of the cable; due to the overlapping of the thin surface layers, the gaps on the surface of the cable are filled, which can reduce the intrusion of external factors such as dust and moisture into the interior of the cable, improve the sealing and protection capabilities of the cable, and extend the service life of the cable; through the extruded polytetrafluoroethylene raw tape, the thin surface layer on the surface of the cable can be flush with the middle thick part of the polytetrafluoroethylene raw tape, forming a uniform insulation layer, improving the insulation performance of the cable, thereby reducing the risk of current leakage and electrical failure; through the extruded polytetrafluoroethylene raw tape, the cross-section of the polytetrafluoroethylene raw tape changes in thickness and width, so that the cable can better disperse the pressure when subjected to external force, improve the mechanical strength of the cable, and increase the wear resistance and durability of the cable.

[0067] like Figure 6 and Figure 7As shown, the driving turntable 2 is provided with two support columns 12, the bottom of the support columns 12 is fixedly connected to the upper surface of the driving turntable 2, the top of the support column 12 is provided with a positioning collar 13, the positioning collar 13 is provided with a mounting plate 14, and the mounting plate 14 is rotatably provided with a first steering wheel 15; the mounting plate 14 and the first steering wheel 15 can ensure that the polytetrafluoroethylene raw belt maintains stable guidance during movement; they help guide the polytetrafluoroethylene raw belt to run along a predetermined path, reduce deviation and shaking, and ensure normal contact between the polytetrafluoroethylene raw belt and the transmission device; the first steering wheel 15 can effectively prevent the polytetrafluoroethylene raw belt from Side drift occurs, that is, deviation from the track or jumping during transmission; they guide the polytetrafluoroethylene raw belt to the correct position, so that it keeps running on the correct track, thereby reducing the risk of deviation of the polytetrafluoroethylene raw belt; a plurality of mounting parts 16 are provided on the support column 12, and a second steering wheel 17 is rotatably provided on the mounting part 16; the correct installation and adjustment of the second steering wheel 17 can reduce the friction and loss between the polytetrafluoroethylene raw belt and the transmission device; they help to maintain the appropriate angle and pressure of the polytetrafluoroethylene raw belt in contact with the steering wheel, reduce energy loss and polytetrafluoroethylene raw belt wear, and extend the service life of the polytetrafluoroethylene raw belt.

[0068] like Figure 7 As shown, a Y-shaped mounting bracket 18 is provided on the upper surface of the positioning collar 13, a concave fixing plate 19 is provided on the upper surface of the Y-shaped mounting bracket 18, and a third steering wheel 20 is provided inside the concave fixing plate 19 for rotation; the third steering wheel 20 can properly adjust the tension of the polytetrafluoroethylene raw tape on the cable; it helps to evenly distribute the tension, reduce the excessive tension of the polytetrafluoroethylene raw tape during the winding process, and avoid damage or breakage; through accurate guidance and uniform tension control, the third steering wheel 20 helps to maintain the winding quality of the polytetrafluoroethylene raw tape; it can reduce the relaxation or tightness of the polytetrafluoroethylene raw tape, ensure the flatness and tightness of the winding, and prevent loose or intertwined winding; at least two sets of tensioning components are provided between the driving turntable 2 and the positioning collar 13 21. The tensioning assembly 21 includes a plurality of limit shafts 2101 rotatably arranged on the positioning collar 13, and a limit sleeve 2102 is arranged on the limit shaft 2101; by arranging the limit shaft 2101 and the limit sleeve 2102, an appropriate tension balance can be maintained between the driving turntable 2 and the positioning collar 13; this helps to ensure the stable tension of the polytetrafluoroethylene raw belt during the transmission process, avoid the occurrence of over-tightening or over-loosening, thereby reducing the wear and damage of the polytetrafluoroethylene raw belt; the existence of the tensioning assembly 21 can buffer the vibration and impact generated during the transmission; the limit sleeve 2102 and other components reduce the impact on the polytetrafluoroethylene raw belt by absorbing and dispersing the impact force and vibration of the transmission system, thereby improving the stability and reliability of the transmission system.

[0069] The third steering wheel 20 cooperates with the calendered wrapping tape to wrap the outer insulation layer of the cable. When the edge of the calendered wrapping tape is slightly warped, since the wrapping device is in the same direction as the wrapping direction, it can well assist the edge of the thinner polytetrafluoroethylene raw tape in the calendered area to better fit the surface without warping, making the cable wrapping surface smoother and achieving a seamless cable appearance.

[0070] like Figure 8 As shown, a first bevel 22 is provided on the recessed portion 10 of the driven wheel 8, and a second bevel 23 matching the first bevel 22 is provided on the outer ring of the annular pressure ring 11; the first bevel 22 on the recessed portion 10 and the second bevel 23 on the outer ring of the annular pressure ring 11 match each other, which can increase the extrusion force and further enhance the compression effect on the polytetrafluoroethylene raw tape; this helps to ensure the tightness between the polytetrafluoroethylene raw tape and the unwinding shaft 4 to avoid loosening or slipping; by increasing the extrusion force, the thin-thick-thin structure of the cross section of the polytetrafluoroethylene raw tape can fit more closely together; this helps to make the transition between the thick and thin parts of the cable surface smoother, making the cable surface look more uniform.

[0071] like Figure 8 As shown, a special-shaped groove 26 is provided on the upper surface of the mounting plate 5, and the special-shaped groove 26 is located between the driven shaft 6 and the driving shaft 7. A slider 27 is provided at the bottom of the driving shaft 7, and the slider 27 is slidably arranged inside the special-shaped groove 26. A locking bolt 28 is provided inside the slider 27, and the slider 27 is locked in the special-shaped groove 26 of the mounting plate 5 by the locking bolt 28; the slider 27 slides in the special-shaped groove 26 and is locked in the special-shaped groove 26 of the mounting plate 5 by the locking bolt 28, so as to adjust the distance between the driving wheel 9 and the driven wheel 8, and adjust the tension of the polytetrafluoroethylene raw belt on the one hand, and the appropriate tension can ensure the normal operation of the polytetrafluoroethylene raw belt in the transmission device, avoid slipping or skidding, and improve the reliability and stability of the transmission.

[0072] like Figure 8 and Fig. 9As shown, the special-shaped groove 26 includes a first guide portion 2601, a second guide portion 2602 and a third guide portion 2603. The first guide portion 2601, the second guide portion 2602 and the third guide portion 2603 are mutually connected. The end of the second guide portion 2602 faces the central axis position of the driven shaft 6, and the end of the third guide portion 2603 faces between two adjacent driven shafts 6. When the end of the second guide portion 2602 faces the central axis position of the driven shaft 6, the driving shaft 7 moves toward the direction of the driven shaft 6 until the driving wheel 9 and the driven wheel 8 are abutted, and the two sides of the polytetrafluoroethylene raw tape are squeezed. The extrusion pressure can control the deformation of the polytetrafluoroethylene raw tape and reduce the bending and jumping of the polytetrafluoroethylene raw tape; this helps to keep the polytetrafluoroethylene raw tape straight and tight, reduce energy loss and wear, and extend the service life of the polytetrafluoroethylene raw tape; appropriate extrusion pressure can keep the polytetrafluoroethylene raw tape in a stable state of motion and reduce the swing and shaking of the polytetrafluoroethylene raw tape; this helps to improve the reliability and stability of the polytetrafluoroethylene raw tape and reduce the risk of failure and shutdown; when the end of the third guide portion 2603 is toward between two adjacent driven shafts 6, it is used to adjust the tension of the polytetrafluoroethylene raw tape.

[0073] The wrapping method of the seamless wrapped cable wrapping device in this embodiment comprises the following steps:

[0074] S1: The unwinding shaft 4 is positioned and installed on the positioning plate 3, the polytetrafluoroethylene raw tape is evenly wound on the unwinding shaft 4, and one end of the polytetrafluoroethylene raw tape is fixedly connected to the unwinding shaft 4, and the other end of the polytetrafluoroethylene raw tape alternately passes through the outer surface of the limiting sleeve 2102, the recessed portion 10 of the driven wheel 8, the outer surface of the second steering wheel 17, the outer surface of the first steering wheel 15 and the outer surface of the third steering wheel 20, and is finally fixed on the cable surface;

[0075] S2: Slide and adjust the position of the slider 27 to make the driving wheel 9 approach the driven wheel 8 until the two sides of the polytetrafluoroethylene raw tape in the recessed portion 10 of the driven wheel 8 respectively abut against the two annular pressure rings 11 on the driving wheel 9, which is used to press the two sides of the polytetrafluoroethylene raw tape to obtain a polytetrafluoroethylene raw tape with a thick middle and thin sides, and then lock the slider 27 in the special-shaped groove 26 of the mounting plate 5 by the locking bolt 28;

[0076] S3: restarting the power supply of the driving motor to rotate the driving turntable 2, and evenly winding the polytetrafluoroethylene raw tape on the surface of the cable to realize the wrapping of the cable;

[0077] S4: The intersection of the three wrapping rods 29 in the wrapping rotating and pressing device 30 is used as the wrapping point for the wrapping tape. The diameter of the center hole of the intersection is the diameter of the cable after wrapping. The center hole at the intersection through which the cable passes, the limitation of the center hole size and the extrusion and guiding effect of the wrapping rod 29 make the polytetrafluoroethylene raw tape tightly wrap around the outer surface of the cable, so as to reduce the air between the polytetrafluoroethylene raw tape layers during the wrapping process.

[0078] After the polytetrafluoroethylene raw tape is wound off the unwinding shaft 4, it passes through the limiting sleeve 2102, the driven wheel 8, the second steering wheel 17, the first steering wheel 15 and the third steering wheel 20 in sequence, and is finally fixed on the cable surface; then, by sliding the position of the slider 27, the recessed parts 10 of the driving wheel 9 and the driven wheel 8 press the two sides of the polytetrafluoroethylene raw tape to form a polytetrafluoroethylene raw tape that is thick in the middle and thin on both sides; finally, the power supply of the driving motor is started to drive the turntable 2 to rotate, so that the polytetrafluoroethylene raw tape is evenly wrapped on the cable surface, and through the expansion and contraction of the expansion disk and the guidance of the three wrapping rods 29, it can well assist the edges of the thinner polytetrafluoroethylene film in the calendered area to better fit the surface without warping, making the cable wrapping surface smoother and making the cable appearance seamless, and through the extrusion of the external force of the wrapping rod 29, the gap between the wrapping layers can be filled by extrusion, which can effectively solve the problem of insulation layer gap and improve product quality and performance.

[0079] In the above two embodiments, after the polytetrafluoroethylene raw tape is unwound from the unwinding shaft 4, it passes through the calendering mechanism 50 to extrude both sides of the polytetrafluoroethylene raw tape in the original state to form a polytetrafluoroethylene raw tape that is thick in the middle and thin on both sides, and finally wrapped around the cable surface. The polytetrafluoroethylene raw tape that is thick in the middle and thin on both sides wrapped around the cable surface is wound synchronously to achieve continuous and seamless wrapping of the polytetrafluoroethylene raw tape on the cable surface.

[0080] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cable seamless wrapping and forming device, comprising an operating platform (1) and a wrapping rotating and pressing device (30), characterized in that: A driving turntable (2) and a positioning disk (3) are rotatably provided on the upper surface of the operating platform (1); a driving motor for driving the driving turntable (2) is provided inside the operating platform (1); the driving turntable (2) and the positioning disk (3) are coaxially arranged; an unwinding shaft (4) for unwinding a polytetrafluoroethylene raw tape is coaxially rotatably connected to the upper surface of the positioning disk (3); and a mounting plate (5) is provided on the driving turntable (2); The mounting plate (5) is provided with a calendering mechanism (50) for extruding two sides of the polytetrafluoroethylene raw tape, the calendering mechanism (50) comprising at least two driven shafts (6) and a driving shaft (7), the driven shaft (6) is provided with a driven wheel (8), the driving shaft (7) is provided with a driving wheel (9), the middle part of the driven wheel (8) is inwardly contracted to form a recessed part (10), the driving wheel (9) has a protrusion (51) matching the recessed part (10), the polytetrafluoroethylene raw tape passes through the recessed part (10) on the driven wheel (8) from the unwinding shaft (4), the protrusion (51) abuts against the recessed part (10), the two ends of the protrusion (51) abut against the two ends of the recessed part (10), and the middle part of the protrusion (51) is spaced from the middle part of the recessed part (10) to form a receiving part (52); The wrapping rotating and pressing device (30) comprises three wrapping rods (29) located at the top of the unwinding shaft (4), the three wrapping rods (29) are arranged obliquely, and the three wrapping rods (29) are staggered and gathered to form an intersection for the cable to pass through, and a center hole is formed in the intersection.

2. The cable seamless wrapping forming device according to claim 1, characterized in that: The recessed portion (10) is located in the middle of the driven wheel (8), and the cross section of the driven wheel (8) is an I-shaped portion; the driving wheel (9) gradually retracts from both ends to the middle, and the raised portion (51) is the end of the driving wheel (9); the driven wheel (8) abuts against the driving wheel (9), and the raised portion (51) abuts against the recessed portion (10).

3. The cable seamless wrapping forming device according to claim 2 is characterized in that: The driving turntable (2) is also provided with a tension adjustment mechanism (60), the tension adjustment mechanism (60) comprising a reversing rod (61), a rocker rod (62) and a positioning rod (63) all vertically arranged on the driving turntable (2), the positioning rod (63) being provided with a positioning wheel (64), the driving turntable (2) being provided with an arc-shaped guide groove (65), the rocker rod being located in the guide groove (65); the driving turntable (2) is also provided with a tension control motor for driving the rocker rod (62) to move along the guide groove (65), and the driving turntable (2) is also provided with a calendering drive motor for driving the driving wheel (9) to rotate.

4. The cable seamless wrapping forming device according to claim 1, characterized in that: The two ends of the recessed portion (10) are two annular grooves (101) spaced apart on the driven wheel (8); the raised portion (51) is two annular pressure rings (11) spaced apart on the driving wheel (9); the raised portion (51) abuts against the recessed portion (10), and the annular pressure ring (11) presses against the annular groove (101); A first inclined surface (22) is provided on the recessed portion (10) of the driven wheel (8), and a second inclined surface (23) matching the first inclined surface (22) is provided on the outer ring of the annular pressure ring (11).

5. The cable seamless wrapping forming device according to claim 4, characterized in that: The upper surface of the mounting plate (5) is provided with a special-shaped groove (26), the special-shaped groove (26) is located between the driven shaft (6) and the driving shaft (7), the bottom of the driving shaft (7) is provided with a slider (27), the slider (27) is slidably arranged inside the special-shaped groove (26), the slider (27) is provided with a locking bolt (28), and the slider (27) is locked in the special-shaped groove (26) of the mounting plate (5) by the locking bolt (28); The special-shaped groove (26) comprises a first guide portion (2601), a second guide portion (2602) and a third guide portion (2603); the first guide portion (2601), the second guide portion (2602) and the third guide portion (2603) are interconnected; the end of the second guide portion (2602) faces the central axis of the driven shaft (6), and the end of the third guide portion (2603) faces between two adjacent driven shafts (6).

6. The cable seamless wrapping forming device according to claim 1, characterized in that: At least two support columns (12) are provided on the driving turntable (2); the bottom of the support column (12) is fixedly connected to the upper surface of the driving turntable (2); a positioning collar (13) is provided on the top of the support column (12); a mounting vertical plate (14) is provided on the positioning collar (13); and a first steering wheel (15) is rotatably provided on the mounting vertical plate (14).

7. The cable seamless wrapping forming device according to claim 6, characterized in that: A plurality of mounting members (16) are provided on the support column (12), and a second steering wheel (17) is rotatably provided on the mounting member (16).

8. The cable seamless wrapping forming device according to claim 6, characterized in that: At least two sets of tensioning assemblies (21) are arranged between the driving turntable (2) and the positioning collar (13), and the tensioning assemblies (21) include a plurality of limiting shafts (2101) rotatably arranged on the positioning collar (13), and limiting sleeves (2102) are arranged on the limiting shafts (2101).

9. A method for manufacturing a cable according to any one of claims 1 to 8, characterized in that: The steps include: S1: The unwinding shaft (4) is positioned and installed on the positioning disk (3), the polytetrafluoroethylene raw tape is evenly wound on the unwinding shaft (4), and one end of the polytetrafluoroethylene raw tape is fixedly connected to the unwinding shaft (4), and the other end of the polytetrafluoroethylene raw tape passes through the calendering mechanism (50) from the unwinding disk and is then wound on the surface of the cable; S2: driving the driving wheel (9) and the driven wheel (8) to abut against each other until the two sides of the polytetrafluoroethylene raw tape in the recessed portion (10) of the driven wheel (8) abut against the raised portion (51) on the driving wheel (9) respectively, so as to press the two sides of the polytetrafluoroethylene raw tape to obtain a polytetrafluoroethylene raw tape with a thick middle and thin sides, and then fixing the relative position of the driving wheel (9) and the driven wheel (8); S3: The polytetrafluoroethylene raw tape formed after calendering, which is thick in the middle and thin on both sides, is passed through the three wrapping rods in the wrapping rotating and pressing device (30), and the intersection of the wrapping tape is the wrapping point of the wrapping tape. The diameter of the center hole of the intersection is the diameter of the cable after wrapping. The center hole at the intersection through which the cable passes, the limitation of the size of the center hole and the extrusion and guiding effect of the wrapping rods (29) make the calendered polytetrafluoroethylene raw tape tightly wrap around the outer surface of the cable, so as to reduce the air between the polytetrafluoroethylene raw tape layers during the wrapping process; S4: driving the driving turntable (2) to rotate, so that the polytetrafluoroethylene raw tape is evenly wound on the surface of the cable in the winding rotating and pressing device (30), and the two adjacent layers of polytetrafluoroethylene raw tape wound on the surface of the cable are overlapped end to end in sequence, and the overlapping parts of the polytetrafluoroethylene raw tape are all polytetrafluoroethylene raw tapes with thinner cross-sections, so as to achieve continuous winding of the cable.

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