Cable, cable extrusion device for preparing cable core and cable preparation method

Abstract

The invention relates to a cable, a cable extrusion device for preparing cable cores and a cable preparation method. The cable comprises two conductor cable cores and at least one ground cable core, the conductor wire core and the ground wire core are positioned and then are subjected to injection molding through an insulating colloid to form an integrated structure; a part of the ground wire core protrudes out of the outer side of the insulating colloid. According to the invention, after the conductor wire core and the ground wire core are positioned, all the wire bodies are subjected to injection molding through the insulating colloid to form the integrated structure, so that the material use and the radial size are reduced, the overall diameter of the cable is obviously reduced, and the cable is more compact; the one-time injection molding process can also complete positioning and fixing of the conductor wire core and the ground wire core, so that the manufacturing process is greatly simplified; a part of the ground wire is exposed outside the insulating colloid, so that the realization of grounding connection is greatly facilitated, the grounding connection is more convenient due to the fact that the part of the ground wire core is exposed, additional processing steps are not needed, and the practicability and the installation efficiency of the cable are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed cables. More specifically, it relates to a cable, an extrusion device for preparing a cable core, and a cable preparation method. Background Art

[0002] In traditional cable structures, the conductor core and the ground core usually adopt a split design. After being wrapped by independent insulating layers, they are integrated through an outer sheath. However, this structure often has the following problems: Large volume: The split setting of the ground wire and the conductor core results in an increase in the overall diameter of the cable, making it difficult to meet the application requirements of compact spaces.

[0003] Complex process: Multiple insulation and sheath processes lead to low production efficiency and high costs; moreover, this preparation process requires ensuring that the ground core and the conductor core are always parallel, but it is difficult to accurately position the ground core during the injection molding process, resulting in the offset of the ground core or uneven insulation coverage, affecting the electrical conductivity and structural stability. Summary of the Invention

[0004] The technical problem to be solved by the present invention is, in view of the above-mentioned defects of the prior art, to provide a cable, an extrusion device for preparing a cable core, and a cable preparation method; aiming to achieve precise positioning of the conductor core and the ground core through an integral injection molding technology, simplify the production process, and improve the compactness and electromagnetic shielding performance of the cable.

[0005] The technical solution adopted by the present invention to solve its technical problems is: On the one hand, the present invention provides a cable, which includes two conductor cores arranged side by side, and at least one ground core; the conductor cores and the ground core are arranged in parallel; after the conductor cores and the ground core are positioned, they are integrally formed through injection molding with an insulating colloid; both of the two conductor cores are buried inside the insulating colloid; a positioning groove for burying the ground core is provided at the outer edge of the insulating colloid; a part of the ground core protrudes outside the insulating colloid. In the cable of the present invention, when there is one ground core, the ground core is located between the two conductor cores. In the cable of the present invention, when there are two ground cores, the two ground cores are respectively located on the left and right sides of the insulating colloid; the two ground cores and the two conductor cores are all on the same horizontal plane. On the other hand, the present invention also provides a cable extrusion device for preparing a wire core, which includes an inner die and an outer die; two first positioning holes for the conductor wire cores to pass through separately are provided on the inner die, and at least one second positioning hole for the ground wire core to pass through separately; a slot for inserting the output end of the inner die is provided on the outer die; a forming channel corresponding to the output end head of the inner die is further provided at the bottom of the output end of the outer die; a ground wire positioning groove extending along the wire outlet direction of the ground wire core is provided on the inner side wall of the forming channel; a cavity for storing insulating glue is further provided on the outer die; a part of the ground wire core is located in the ground wire positioning groove to avoid contact with the insulating glue; the cavity is communicated with the forming channel to allow the insulating glue to flow into the forming channel to inject and mold the positioned conductor wire cores and ground wires. For the cable extrusion device of the present invention, a wire passing channel for two said conductor wire cores and at least one said ground wire core to pass through is provided along the length of the inner die; the first positioning hole and the second positioning hole are both communicated with the wire passing channel. For the cable extrusion device of the present invention, the wire passing channel is tapered from the outside to the inside along the length of the inner die. For the cable extrusion device of the present invention, the cavity is located between the inner side wall of the slot and the outer side wall of the inner die; the cavity is coaxially arranged with the inner die. For the cable extrusion device of the present invention, the part of the ground wire core exposed outside the insulating glue is in contact with the shielding layer. On the other hand, the present invention also provides a cable preparation method, which includes the following steps: Respectively pass two conductor wire cores through the first positioning holes of the inner die, and then pass the ground wire core through the second positioning hole of the inner die. Insert the output end of the inner die into the slot of the outer die, and horizontally insert all the conductor wire cores and all the ground wire cores on the inner die into the forming channel; all the conductor wire cores are positioned inside the forming channel, the ground wire core is positioned at the outer edge of the forming channel, and a part of the ground wire core is inserted into the corresponding ground wire positioning groove on the forming channel. Add a flowable insulating glue into the cavity on the outer die, and allow the insulating glue to flow into the forming channel to inject and mold the positioned conductor wire cores and ground wires to form a cable. For the cable extrusion device of the present invention, when there is one ground wire core, the ground wire core is located between the two conductor wire cores. When there are two ground wire cores, the two ground wire cores are respectively located on the left and right sides of the cable, and the two ground wire cores and the two conductor wire cores are all located on the same horizontal plane.

[0006] The beneficial effects of the present invention are as follows: The cable, the cable extrusion device for preparing the core, and the cable preparation method are ingeniously designed and have the following advantages: 1. After positioning the conductor core and the ground core, all the wire bodies are injection-molded into an integrated structure by insulating colloid, reducing material usage and radial dimensions, significantly reducing the overall diameter of the cable, and making the cable more compact; 2. The positioning and fixation of the conductor core and the ground core can be completed through a single injection molding process, greatly simplifying the manufacturing process; 3. Part of the ground wire is exposed outside the insulating colloid. This design greatly facilitates the realization of grounding connection; the partial exposure of the ground core makes the grounding connection more convenient, without additional processing steps, improving the practicality and installation efficiency of the cable. This design is especially suitable for scenarios that require quick installation and maintenance, such as industrial equipment, communication systems, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present invention in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts: Figure 1 is a schematic structural diagram of the cable 10 in Embodiment 1 of the present invention (single ground core structure); Figure 2 is another schematic structural diagram of the cable 10 in Embodiment 1 of the present invention (double ground core structure); Figure 3 is a schematic structural diagram of a cable extrusion device for preparing a core in Embodiment 2 of the present invention; Figure 4 is Figure 3 a schematic structural diagram of the inner die 20 in Figure 5 is Figure 3 a schematic structural diagram of the outer die 30 in Figure 6 is a schematic internal structure diagram of a cable extrusion device for preparing a core in Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0008] In the description, claims and drawings of the present invention, terms such as "first", "second", "third" and "fourth" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally further comprises steps or units not listed, or optionally further comprises other steps or units inherent to these processes, methods, products or devices.

[0009] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0010] "Plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0011] Moreover, terms indicating directions such as "upper", "lower", "front", "rear", "left", "right", "upper end", "lower end", "longitudinal", etc. are all referenced based on the attitude position of the device or equipment described in this solution during normal use.

[0012] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0013] 1. Embodiment 1: The present invention provides a cable 10, as Figure 1As shown in the figure, it includes two conductor cores 11 arranged side by side, and at least one ground core 12; the conductor cores 11 and the ground core 12 are arranged in parallel; after the conductor cores 11 and the ground core 12 are positioned, they are integrally formed by injection molding with an insulating colloid 13. Due to the integrated design of the conductor core and the ground core, an independent insulating layer is omitted, thereby reducing the overall diameter of the cable and making it more suitable for applications in compact spaces; and by integrating the conductor core and the ground core through injection molding, not only are multiple insulation and sheathing processes reduced, production efficiency is improved and costs are lowered, but also the conductor core and the ground core are positioned at one time during the injection molding process, reducing the possibility of offset and ensuring the electrical conductivity and structural stability of the cable. Both conductor cores 11 are buried inside the insulating colloid 13; a positioning groove 131 for burying the ground core 12 is provided at the outer edge of the insulating colloid 13; the ground core 12 is firmly fixed in the insulating colloid by the adhesion of the insulating colloid 13, and the opening size of the positioning groove 131 is smaller than the size of the largest cross-section of the ground core 12; the structural stability is high. Further, a part of the ground core 12 protrudes outside the insulating colloid 13, which can provide better grounding performance and help improve the electromagnetic compatibility (EMC) of the cable. It should be noted that the area of the ground core 12 exposed outside is less than one-half of the area buried in the insulating colloid 13, which can ensure that the ground core 12 will not easily fall out of the insulating colloid.

[0014] The cable is ingeniously designed. After positioning the conductor core and the ground core first, and then injecting and molding all the wire bodies into an integrated structure with an insulating colloid, not only is the material usage and radial dimension reduced, and the overall diameter of the cable is significantly reduced, making the cable more compact; but also this one-time injection molding process can simultaneously complete the positioning and fixing of the conductor core and the ground core, greatly simplifying the manufacturing process; exposing a part of the ground wire outside the insulating colloid can greatly facilitate the realization of the grounding connection, making the partial exposure of the ground core make the grounding connection more convenient, without additional processing steps, improving the practicability and installation efficiency of the cable.

[0015] Further, as Figure 1 shown, when the ground core 12 is one, the ground core 12 is located between the two conductor cores 11, which helps to balance the electric field distribution and reduce electromagnetic interference.

[0016] Optionally, in another embodiment, as Figure 2 shown, the ground core 12 can also be two, and the two ground cores 12 are respectively located on the left and right sides of the insulating colloid 13; the two ground cores 12 and the two conductor cores 11 are all located on the same horizontal plane; the two ground wires provide double grounding protection, increasing the reliability of grounding. Even when one ground core fails, the other can still provide grounding protection.

[0017] 2. Embodiment Two: The present invention also provides a cable extrusion device for preparing a wire core, as Figures 3-6 shown, which includes an inner die 20 and an outer die 30; two first positioning holes 21 for the conductor wire core 11 to pass through separately are provided on the inner die 20, and at least one second positioning hole 22 for the ground wire core 12 to pass through separately; the two first positioning holes 21 are arranged side by side. When there is one ground wire core 12, the second positioning hole 22 is arranged between the two first positioning holes 21, and the axis of the second positioning hole 22 and the axes of the two first positioning holes 21 are connected in sequence to form an isosceles triangle; when there are two ground wire cores 12, the two second positioning holes 22 are respectively arranged on both sides of the two first positioning holes 21, and the axis of the second positioning hole 22 and the axes of the two first positioning holes 21 are connected in sequence to form a straight line. Through the first positioning holes and the second positioning holes on the inner die, the conductor wire core and the ground wire core can be accurately positioned during the extrusion process, the relative positions between the wire cores are maintained, and the offset is reduced; a slot 31 for inserting the output end of the inner die 20 is provided on the outer die 30; a forming channel 32 corresponding to the output end head of the inner die 20 is further provided at the bottom of the output end of the outer die 30; the cross-sectional shape of the forming channel can be quasi-elliptical or circular, and can also be other shapes, not limited to the shapes shown in the drawings of the specification; a ground wire positioning groove 321 extending along the wire outlet direction of the ground wire core 12 is provided on the inner side wall of the forming channel 32; a cavity 01 for storing insulating glue is further provided on the outer die 30; a part of the ground wire core 12 is located in the ground wire positioning groove 321 to avoid contact with the insulating glue 13, ensuring that a part of the ground wire core 12 is always exposed outside the insulating glue during the injection molding process of the insulating glue, so that the formed cable 10 can provide better grounding performance, which helps to improve the electromagnetic compatibility (EMC) of the cable, and the process flow is more simplified; the cavity is communicated with the forming channel 32 to allow the insulating glue to flow into the forming channel 32 to inject and mold the positioned conductor wire core 11 and ground wire core 12. This integrated cable structure reduces possible fault points inside the cable, such as insulation layer breakage, wire core displacement, etc., thereby reducing the failure rate.

[0018] The cable extrusion device for preparing the core is ingeniously designed. The inner die positions the conductor core and the ground wire core, and all the positioned wires pass through the forming channels on the outer die. Then, insulating glue is injected into the cavity, and the insulating glue flows into the forming channels to inject and mold the conductor core and the ground wire core, forming an integrated cable structure. Then, the cable structure is extruded, improving production efficiency. The formed cable not only reduces material usage and radial dimensions, significantly reducing the overall diameter of the cable and making the cable more compact. Moreover, this one-time injection molding process can simultaneously position and fix the conductor core and the ground wire core, greatly simplifying the manufacturing process. Exposing a part of the ground wire outside the insulating colloid can greatly facilitate the realization of grounding connection, making the partial exposure of the ground wire core make the grounding connection more convenient, without additional processing steps, improving the practicability and installation efficiency of the cable.

[0019] Further, along the length of the inner die 20, there is a wire passing channel 23 for two conductor cores 11 and at least one ground wire core 12 to pass through; both the first positioning hole 21 and the second positioning hole 22 are connected to the wire passing channel 23. The wire passing channel 23 provides a relatively stable moving path for all the wire cores, not only reducing the large vibration and deviation of the wire cores during the extrusion process, but also preventing interference or accidental contact from other external objects.

[0020] Further, the wire passing channel 23 is tapered from the outside to the inside along the length of the inner die 20; the cavity is located between the inner side wall of the slot 31 and the outer side wall of the inner die 20; the cavity is coaxially arranged with the inner die 20; the coaxial arrangement ensures that the insulating colloid can evenly surround the conductor core and the ground wire core, thereby improving the insulation uniformity and overall performance of the cable.

[0021] Further, the part of the ground wire core 12 exposed outside the insulating glue is in contact with the shielding layer, eliminating the need for additional grounding connection components, simplifying the cable structure, reducing the manufacturing cost, and also being able to more effectively ground the shielding layer, thereby improving the shielding effect of the cable against external electromagnetic interference.

[0022] 3. Embodiment Three: The present invention also provides a cable preparation method, applicable to the cable extrusion device as in Embodiment Two. The cable preparation method includes the following steps: S10: Pass the two conductor cores through the first positioning holes of the inner die respectively, and then pass the ground wire core through the second positioning hole of the inner die; S20: Insert the output end of the inner die into the slot of the outer die, and horizontally insert all the conductor cores and all the ground wire cores on the inner die into the forming channels; all the conductor cores are positioned inside the forming channels, the ground wire core is positioned at the outer edge of the forming channels, and a part of the ground wire core is inserted into the corresponding ground wire positioning slots on the forming channels; S30: Add a flowable insulating glue into the cavity on the outer mold, and make the insulating glue flow into the forming channel to injection-mold the positioned conductor core and ground wire to form a cable.

[0023] Among them, the sequence of S10 and S20 can be interchanged.

[0024] Further, when there is one ground wire core, the ground wire core is located between the two conductor cores.

[0025] Optionally, when there are two ground wire cores, the two ground wire cores are respectively located on the left and right sides of the cable, and the two ground wire cores and the two conductor cores are all on the same horizontal plane.

[0026] The cable preparation method is ingeniously designed and has high preparation efficiency. After positioning the conductor core and the ground wire core first, and then injection-molding all the wire bodies into an integrated structure with an insulating colloid, it not only reduces the material usage and radial dimension, significantly reduces the overall diameter of the cable, and makes the cable more compact; moreover, this one-time injection-molding process can simultaneously complete the positioning and fixing of the conductor core and the ground wire core, greatly simplifying the manufacturing process; exposing a part of the ground wire outside the insulating colloid can greatly facilitate the realization of the grounding connection, making the partial exposure of the ground wire core make the grounding connection more convenient, without additional processing steps, and improving the practicability and installation efficiency of the cable.

[0027] It should be understood that those of ordinary skill in the art can make improvements or changes according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. A cable, characterized in that, It includes two conductor cores arranged side by side, and at least one ground wire core; the conductor cores are arranged in parallel with the ground wire core; after the conductor cores and the ground wire core are positioned, they are integrally formed by injection molding of insulating colloid; both of the two conductor cores are buried inside the insulating colloid; a positioning groove for partially inserting the ground wire core is provided at the outer edge of the insulating colloid; a part of the ground wire core protrudes outside the insulating colloid.

2. The cable according to claim 1, characterized in that, When there is one ground wire core, the ground wire core is located between the two conductor cores.

3. The cable according to claim 2, characterized in that, When there are two ground wire cores, the two ground wire cores are respectively located on the left and right sides of the insulating colloid; the two ground wire cores and the two conductor cores are all on the same horizontal plane.

4. A cable extrusion device for preparing a core, characterized in that, It includes an inner mold and an outer mold; two first positioning holes respectively for the conductor cores to pass through alone and at least one second positioning hole for the ground wire core to pass through alone are provided on the inner mold; a slot for inserting the output end of the inner mold is provided on the outer mold; a molding channel corresponding to the output end head of the inner mold is further provided at the bottom of the output end of the outer mold in the slot; a ground wire positioning groove extending along the wire outlet direction of the ground wire core is provided on the inner side wall of the molding channel; a cavity for storing insulating colloid is further provided on the outer mold; a part of the ground wire core is located in the ground wire positioning groove to avoid contacting the insulating colloid; the cavity is communicated with the molding channel to allow the insulating colloid to flow into the molding channel to inject and mold the positioned conductor cores and ground wire.

5. The cable extrusion device according to claim 4, wherein A wire passing channel for passing the two conductor cores and at least one ground wire core is provided along the length of the inner mold; both the first positioning hole and the second positioning hole are communicated with the wire passing channel.

6. The cable extrusion device according to claim 5, characterized in that, The wire passing channel is tapered from the outside to the inside along the length of the inner mold.

7. The wire and cable extrusion device according to any one of claims 4-6, characterized in that, The cavity is located between the inner side wall of the slot and the outer side wall of the inner mold; the cavity is coaxially arranged with the inner mold.

8. The cable extrusion device according to claim 4, wherein The part of the ground wire core exposed outside the insulating colloid is in contact with the shielding layer.

9. A method for preparing a cable, applicable to the cable extrusion device as described in any one of claims 4-8, characterized in that, The method includes the following steps: Respectively pass the two conductor cores through the first positioning holes of the inner mold, and then pass the ground wire core through the second positioning hole of the inner mold. Insert the output end of the inner mold into the slot of the outer mold, and horizontally insert all the conductor cores and all the ground wire cores on the inner mold into the molding channel; all the conductor cores are positioned inside the molding channel, the ground wire core is positioned at the outer edge of the molding channel, and a part of the ground wire core is inserted into the corresponding ground wire positioning groove on the molding channel. Add flowable insulating colloid into the cavity on the outer mold, and make the insulating colloid flow into the molding channel to inject and mold the positioned conductor cores and ground wire to form a cable.

10. The method for preparing a cable according to claim 9, wherein , when there is one ground wire core, the ground wire core is located between the two conductor cores; when there are two ground wire cores, the two ground wire cores are respectively located on the left and right sides of the cable, and the two ground wire cores and the two conductor cores are all on the same horizontal plane.

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