A mold for cable shield braiding
By designing a mold for cable shielding layer braiding and adopting a sleeve and groove structure, the problems of uneven loft, low efficiency and core wire damage in cable shielding layer braiding were solved, achieving efficient and uniform shielding layer braiding and high-frequency signal transmission.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PINAVISEN (SUZHOU) ELECTRIC TECH CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-06-05
AI Technical Summary
In existing technologies, the braiding quality of cable shielding layers is difficult to control, resulting in uneven loft, low efficiency, poor consistency, and easy damage to the core wire insulation layer, which cannot meet the needs of automated production.
Design a mold for braiding cable shielding layers, including a sleeve and a groove. The arc-shaped cross-section of the groove is used to support the core wire and provide a curved surface for copper wire winding. Combined with guide grooves, pointed structures and coatings, it ensures the uniformity of the copper wire winding process and protects the core wire.
The standardized, loose weave of the shielding layer improved production efficiency, protected the integrity of the core wire, and ensured batch consistency and high-frequency signal transmission performance.
Smart Images
Figure CN224328549U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cable production technology, specifically relating to a mold for braiding cable shielding layers. Background Technology
[0002] In the field of cable manufacturing, the braiding quality of the shielding layer directly affects the electromagnetic shielding performance and mechanical strength of the cable. Traditional copper wire shielding layers are mostly braided manually: after fixing the core wire, the operator holds the copper wire and braids it crisscross along the core wire axis. However, this method has significant drawbacks: (1) It is difficult to control the looseness: uneven manual force leads to fluctuations in the tightness of the braided layer. If it is too tight in some places, it will compress the core wire insulation layer, and if it is too loose, it will reduce the shielding effectiveness; (2) It is inefficient: manual operation is slow and cannot match the rhythm of automated production lines, resulting in high labor costs; (3) It is inconsistent: different operators or multiple operations by the same person will produce differences in tightness, resulting in unstable batch quality; (4) It is prone to damage: direct friction between the copper wire and the core wire may scratch the insulation layer, especially for thin-diameter or special core wires.
[0003] While existing mechanical braiding equipment exists, it primarily employs a tight winding pattern, making it difficult to achieve a controllable, loose structure (i.e., maintaining a uniform air gap between the braided layer and the core wire). This structure is crucial for high-frequency signal transmission (reducing dielectric loss), yet specialized tooling is lacking for standardized production. Therefore, a mold for braiding cable shielding layers was designed to address these issues.
[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content
[0005] To overcome the shortcomings of the prior art, the purpose of this utility model is to provide a mold for braiding cable shielding layers.
[0006] To achieve the above and other related objectives, the technical solution provided by this utility model is: a mold for braiding cable shielding layers, comprising:
[0007] A sleeve body, wherein an axial through hole is provided at the center of the sleeve body for the core wire to pass through;
[0008] The groove extends axially from one side of the sleeve and has an arc-shaped cross-section, which is used to support the core wire and provide a curved surface for the copper wire to be wound.
[0009] In this design, the arc-shaped cross-section of the groove allows the copper wire to naturally form a spiral space with a uniform radius of curvature during winding. After extraction, the copper wire elastically resets to form a uniform and fluffy structure.
[0010] Furthermore, the radius of curvature R of the arc-shaped cross-section of the groove satisfies: R ≥ 1.5 × d; where d is the core wire diameter. In this scheme, when R ≥ 1.5d, the uniformity error of the air gap in the fluffy layer is smaller, the air gap is less prone to collapse, and the dielectric loss is lower, which can ensure structural stability and optimize high-frequency signal transmission.
[0011] Furthermore, the end of the groove near the sleeve is connected to the sleeve via a tapered guide groove. In this design, the guide groove allows the core wire to be smoothly guided into the groove, preventing scratches.
[0012] Furthermore, the end of the groove away from the sleeve is provided with a pointed structure for guiding the axial output of the braided cable.
[0013] Furthermore, the axial length of the pointed structure is 3 to 5 times the diameter d of the core wire. In this design, it can provide sufficient guiding distance and suppress radial sway during cable output.
[0014] Furthermore, the length of the groove is 1.5 to 2 times the length of the sleeve. In this design, sufficient copper wire can be wound onto a curved surface to ensure the coverage of the shielding layer, while avoiding insufficient rigidity due to excessive length.
[0015] Furthermore, the central angle of the arc-shaped cross-section of the groove is 180°~220°. In this design, the groove, which is no less than a semi-circular structure, wraps around and supports the core wire, preventing the core wire from detaching from the groove during dynamic weaving.
[0016] Furthermore, two mounting holes are provided on the side of the sleeve, and the inner wall of the mounting holes is provided with internal threads. The axis of the mounting holes is perpendicular to the axis of the sleeve. In this design, bolts are used for direct fastening to suppress vibration displacement during the weaving process.
[0017] Furthermore, the groove wall edges are chamfered. In this design, the chamfer eliminates the risk of sharp edges cutting the copper wires, thus improving the braiding yield.
[0018] Furthermore, the surface of the groove is coated with a polytetrafluoroethylene (PTFE) coating or a ceramic coating. In this design, the coating prevents scratches on the copper wire surface during high-speed winding, ensuring the conductivity continuity of the shielding layer.
[0019] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:
[0020] This invention achieves standardized, fluffy weaving of the shielding layer by employing a weaving mold structure, with the following specific advantages:
[0021] (1) Uniform and controllable fluffiness: The arc-shaped cross-section of the groove allows the copper wire to naturally form a spiral space with a uniform radius of curvature when it is wound. After being pulled out, the copper wire elastically resets to form a uniform fluffi structure. The fluffiness is precisely controlled by the difference between the diameter of the groove and the diameter of the core wire to ensure batch consistency.
[0022] (2) Production efficiency is significantly improved: the mold can be installed with automated winding equipment, the mechanical winding speed of copper wire is much higher than that of manual weaving, and the single-piece operation time is reduced;
[0023] (3) Protect the integrity of the core wire: part of the core wire is placed in the groove, rather than the whole directly contacting the copper wire, so the friction damage during the winding process is smaller, which is especially suitable for ultra-fine core wires or fluoroplastics and other insulation layers that are easily scratched. Attached Figure Description
[0024] Figure 1 This is a schematic cross-sectional view of the overall structure of the weaving mold of this utility model;
[0025] Figure 2 This is a schematic AA cross-sectional view of the present invention;
[0026] Figure 3 This is a schematic diagram of the present invention from direction B;
[0027] In the above attached diagrams, 1 is the sleeve; 2 is the axial through hole; 3 is the groove; 4 is the guide groove; 5 is the pointed structure; 6 is the mounting hole; and 7 is the chamfer. Detailed Implementation
[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0029] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0033] Example 1:
[0034] This embodiment provides a mold for braiding cable shielding layers, see attached document. Figure 1 and attached Figure 2 As shown, it includes:
[0035] Sleeve 1, with an axial through hole 2 at the center for the core wire to pass through;
[0036] The groove 3 extends axially from one side of the sleeve 1. The cross-section of the groove 3 is arc-shaped and is used to support the core wire and provide a curved surface for the copper wire to be wound.
[0037] The end of the groove 3 near the sleeve 1 is connected to the sleeve 1 via a conical guide groove 4. The guide groove 4 allows the core wire to be smoothly guided into the groove 3, avoiding scratches. In specific implementation, the diffusion cone angle D of the guide groove 4 is 30°~45°, which can be 30°, 35°, 40° or 45°.
[0038] The sleeve 1, the groove 3 and the guide groove 4 are an integrated structure, which is structurally stable.
[0039] The structure of sleeve 1 can be stepped sleeve 1, which facilitates docking and installation with automated winding equipment.
[0040] In use, the core wire is inserted from the end furthest from the groove 3. After passing through the axial through hole 2, the core wire extends into the groove 3 and is supported by the inner side of the groove 3. After the core wire is placed, an automatic winding device can be used to wind the copper wire onto the groove 3 to form a shielding layer. The arc-shaped groove 3 can constrain the winding path of the copper wire, so that the braided layer forms a uniform spiral gap (not manually random tension).
[0041] In the specific implementation process, a wire pulling device is set on the discharge side of the core wire, which can make the core wire with the shielding layer move along the axis. It can realize simultaneous pulling and braiding. When the core wire is pulled, the groove 3 is equivalent to being axially pulled away from the core wire and the shielding layer. After the groove 3 is pulled away, the copper wire expands elastically and automatically forms a standardized air gap with the core wire (the fluffiness is precisely controlled by the geometric dimensions of the mold).
[0042] See appendix Figure 3 As shown, the radius of curvature R of the arc-shaped cross-section of the groove 3 satisfies: R ≥ 1.5 × d; where d is the core wire diameter. When R ≥ 1.5d, the uniformity error of the air gap in the fluffy layer is smaller, the air gap is less prone to collapse, and the dielectric loss is lower, which can ensure structural stability and optimize high-frequency signal transmission. If the radius of curvature is too small (R < 1.5d), it will cause excessive rebound after the copper wire is pulled out, resulting in a loose fluffy structure.
[0043] See appendix Figure 1As shown, the end of the groove 3 furthest from the sleeve 1 is provided with a pointed structure 5, which is used to guide the axial output of the braided cable (core wire + shielding layer). In specific implementation, the cone angle of the pointed structure 5 is 15°~45°, which can be 15°, 20°, 25°, 30°, 35°, 40° or 45°. The axial length of the pointed structure 5 is 3 to 5 times the core wire diameter d, which can provide sufficient guiding distance and suppress radial sway during cable output.
[0044] See appendix Figure 1 As shown, the length of the groove 3 is 1.5 to 2 times the length of the sleeve 1. This provides sufficient copper wire for winding the curved surface, ensuring the coverage of the shielding layer, while avoiding insufficient rigidity due to excessive length.
[0045] See appendix Figure 3 As shown, the central angle of the arc-shaped cross-section of the groove 3 is 180°~220°. The central angle can be 180°, 200°, or 220°. The groove 3 has a semi-circular structure that wraps around and supports the core wire, preventing the core wire from detaching from the groove 3 during dynamic braiding. The groove wall edge of the groove 3 is chamfered 7. The chamfer 7 eliminates the risk of sharp edges cutting the copper wire and improves the braiding yield.
[0046] See appendix Figure 1 and attached Figure 2 As shown, two mounting holes 6 are provided on the side of the sleeve 1, providing bolt locking interfaces to achieve a detachable rigid connection between the mold and the winding equipment. The inner wall of the mounting hole 6 is provided with internal threads, which can be directly tightened by bolts to suppress vibration displacement during the weaving process. The axis of the mounting hole 6 is set perpendicular to the axis of the sleeve 1.
[0047] The surface of the tank 3 is coated with a polytetrafluoroethylene (PTFE) or ceramic coating. This coating prevents scratches on the copper wire surface during high-speed winding, ensuring the continuity of the shielding layer's conductivity. The coating material on the surface of the tank 3 includes, but is not limited to, PTFE or ceramic, and must meet the requirements of a coefficient of friction ≤0.1 and a coating hardness ≥HV800 to guarantee the mold's service life.
[0048] Example 2:
[0049] This embodiment is a further improvement based on Embodiment 1. Specifically, a laser scale ring (not shown in the attached drawings) is provided on the outer wall of the outlet end of the pointed structure 5. The laser scale ring provides visual monitoring of the shielding layer's output position and precisely controls the weaving length.
[0050] The mold designed in this utility model for braiding cable shielding layers has an arc-shaped cross-section of the groove, which allows the copper wire to naturally form a spiral space with a uniform radius of curvature during winding. After being pulled out, the copper wire elastically returns to its original position, forming a uniform and fluffy structure. The mold can be installed with automated winding equipment, resulting in high braiding efficiency. The core wire is placed in the groove rather than directly contacting the copper wire as a whole, thus minimizing frictional damage during the winding process.
[0051] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.
Claims
1. A mold for braiding cable shielding layers, characterized in that, include: Sleeve (1), the center of which is provided with an axial through hole (2) for the core wire to pass through. The groove (3) extends axially from one side of the sleeve (1) and has a circular arc cross-section to support the core wire and provide a curved surface for the copper wire winding.
2. The mold for braiding cable shielding layers according to claim 1, characterized in that: The radius of curvature R of the arc-shaped cross section of the groove (3) satisfies: R≥1.5×d; where d is the diameter of the core wire.
3. The mold for braiding cable shielding layers according to claim 1, characterized in that: The end of the groove (3) near the sleeve (1) is connected to the sleeve (1) through a conical guide groove (4).
4. A mold for braiding cable shielding layers according to claim 2, characterized in that: The end of the groove (3) away from the sleeve (1) is provided with a pointed structure (5) for guiding the axial output of the braided cable.
5. A mold for braiding cable shielding layers according to claim 4, characterized in that: The axial length of the pointed structure (5) is 3 to 5 times the diameter d of the core wire.
6. A mold for braiding cable shielding layers according to claim 1, characterized in that: The length of the groove (3) is 1.5 to 2 times the length of the sleeve (1).
7. A mold for braiding cable shielding layers according to claim 1, characterized in that: The central angle of the arc-shaped cross section of the groove (3) is 180°~220°.
8. A mold for braiding cable shielding layers according to claim 1, characterized in that: The sleeve (1) has two mounting holes (6) on its side. The inner wall of the mounting hole (6) is provided with internal thread. The axis of the mounting hole (6) is perpendicular to the axis of the sleeve (1).
9. A mold for braiding cable shielding layers according to claim 1, characterized in that: The edge of the tank wall of the tank (3) is chamfered (7).
10. A mold for braiding cable shielding layers according to claim 1, characterized in that: The surface of the tank (3) is provided with a polytetrafluoroethylene coating or a ceramic coating.