Cable structure with composite layer

Abstract

The utility model discloses a cable structure with a composite layer, comprising a wire core and an insulating layer, the wire core is composed of a single metal wire core or a plurality of metal wire cores, the insulating layer wraps the peripheral wall of the wire core, the peripheral wall of the insulating layer is provided with a plurality of positioning grooves, the positioning grooves are provided with openings, and the openings of the positioning grooves are communicated with the insulating layer. The inner diameter of the opening is smaller than the inner diameter of the positioning groove, the sheath layer is formed on the outer wall of the insulating layer, and the inner wall of the sheath layer is provided with a matching part matched with the positioning groove. The insulation layer and the sheath layer are both formed through extrusion molding, the combination degree between the insulation layer and the sheath layer is further achieved through the clamping structure of the positioning groove and the matching part, the inner diameter of the opening is smaller than that of the positioning groove, and therefore the matching part extends into the positioning groove to guarantee limiting between the insulation layer and the sheath layer, and meanwhile, the matching part is not prone to falling off. And the combination degree of the two is improved under the influence of the material melting temperature, so that the stability of the cable is not influenced even if the melting temperatures of the two are different.

Description

Technical Field

[0001] This utility model relates to the field of cable structure, and in particular to a cable structure with a composite layer. Background Technology

[0002] In existing cable structures, there are generally three components: the conductor, an insulation layer on the outer periphery of the conductor, and a sheath layer on the outer periphery of the insulation layer. The insulation layer effectively insulates the conductor or shields the signal, thereby ensuring conductivity or signal transmission. The sheath layer generally provides support or protection for the cable, thereby improving its support and abrasion resistance, and reducing wear on the conductor.

[0003] In actual production, the materials of the insulation layer and the sheath layer may differ, mainly in their melting temperatures. This can lead to variations in the fit between the insulation layer and the sheath layer, particularly in the coefficient of friction and smoothness. Consequently, the adhesion between the insulation layer and the sheath layer can also differ, potentially causing loosening and displacement between the wire core, insulation layer, and sheath layer, thus affecting cable quality.

[0004] Current practices generally involve using materials with similar melting temperatures (the core, insulation layer, and sheath layer have similar melting temperatures) to ensure stable bonding between the various material layers. However, this also reduces the corresponding properties of the insulation layer and sheath layer. Utility Model Content

[0005] The main purpose of this invention is to propose a cable structure with composite layers, which aims to improve the existing cable structure. Even when using materials with large differences in melting temperature (within a predetermined range), the bonding between the various material layers can be stable, thereby ensuring the stability of the cable.

[0006] To achieve the above objectives, this utility model proposes a cable structure with a composite layer, comprising:

[0007] The wire core is composed of a single metal wire core or a number of metal wire cores;

[0008] An insulating layer is provided, which covers the outer peripheral wall of the wire core. The outer peripheral wall of the insulating layer is provided with a plurality of positioning grooves. Each positioning groove has an opening, and the inner diameter of the opening is smaller than the inner diameter of the positioning groove.

[0009] A sheath layer is formed on the outer wall of the insulating layer, and the inner wall of the sheath layer is provided with a fitting part that mates with the positioning groove.

[0010] In actual processing, both the insulation layer and the sheath layer are extruded. The bonding between the insulation layer and the sheath layer is achieved through the interlocking structure of the positioning groove and the fitting part. The inner diameter of the opening is smaller than the inner diameter of the positioning groove, so the fitting part extending into the positioning groove can ensure the limiting between the insulation layer and the sheath layer. At the same time, the bonding between the two is improved under the influence of the material melting temperature. Therefore, even if there is a difference in the melting temperature between the two, it will not affect the stability of the cable, thereby improving the quality and service life of the cable and avoiding the problem of delamination. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the cable cross-section;

[0012] Figure 2 This is a magnified view of a portion of the image.

[0013] Figure 3 A schematic diagram of an embodiment of the positioning groove shape;

[0014] Figure 4 This is a schematic diagram of an insulating layer forming mold.

[0015] In the picture,

[0016] 11 is the wire core, 12 is the insulation layer, and 13 is the sheath layer.

[0017] 2 is the positioning groove, 21 is the neck groove, and 22 is the retaining groove.

[0018] 3 is the mating part, 31 is the neck, and 32 is the locking part. Detailed Implementation

[0019] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0022] like Figures 1 to 4 As shown, a cable structure with a composite layer includes:

[0023] The wire core 11 is composed of a single metal wire core 11 or a plurality of metal wire cores 11;

[0024] An insulating layer 12 is provided, which covers the outer peripheral wall of the wire core 11. The outer peripheral wall of the insulating layer 12 is provided with a plurality of positioning grooves 2. The positioning grooves 2 are provided with openings, and the inner diameter of the openings is smaller than the inner diameter of the positioning grooves 2.

[0025] Sheath layer 13 is formed on the outer wall of insulating layer 12, and the inner wall of sheath layer 13 is provided with a fitting part 3 that cooperates with positioning groove 2.

[0026] In actual processing, both the insulation layer 12 and the sheath layer 13 are extruded. The bonding between the insulation layer 12 and the sheath layer 13 is achieved through the interlocking structure of the positioning groove 2 and the fitting part 3. The inner diameter of the opening is smaller than the inner diameter of the positioning groove 2. Therefore, the fitting part extending into the positioning groove 2 can ensure the limiting between the insulation layer 12 and the sheath layer 13. At the same time, the bonding between the two is improved under the influence of the material melting temperature. Therefore, even if there is a difference in the melting temperature between the two, it will not affect the stability of the cable, thereby improving the quality and service life of the cable and avoiding the problem of delamination.

[0027] Specifically, the positioning groove 2 of the insulating layer 12 is extruded. In actual processing, during the extrusion of the insulating layer 12, the mold has a predetermined positioning mold, so that the positioning groove 2 can be formed during extrusion, thus directly forming the shape. For example... Figure 4 The mold.

[0028] In this embodiment of the utility model, after the insulating layer 12 is extruded, the positioning groove 2 is cut by a milling cutter. Of course, in actual design, there are some non-standard requirements, so the method of extrusion molding followed by processing can also be adopted, for example, for products with larger dimensions.

[0029] Specifically, the positioning groove 2 includes a neck groove 21 and an inwardly extending slot 22, the opening is located in the neck groove 21, and the inner diameter of the neck groove 21 is smaller than the position of the slot 22;

[0030] The fitting part 3 is provided with a neck 31 and a locking part 32 that cooperate with the neck groove 21 and the locking groove 22, thereby realizing the bonding between the insulation layer 12 and the sheath layer 13.

[0031] In this embodiment of the invention, the cross-section of the slot 22 is rectangular or triangular.

[0032] Specifically, when the card slot 22 is triangular, the two sides of the card slot 22 are arc-shaped surfaces or vertical surfaces, which can be designed according to actual requirements.

[0033] In this embodiment of the utility model, when the slot 22 is rectangular, the neck slot 21 is also rectangular.

[0034] Specifically, the positioning groove 2 is distributed circumferentially along the outer wall of the insulation layer 12, and the positioning groove 2 is arranged through the cable along its length.

[0035] In this embodiment of the invention, the insulating layer 12 is made of PA or FEP material, and the sheath layer 13 is made of TPE or PVC material.

[0036] The insulation layer 12 is made of PA or FEP material, and the sheath is made of TPE or PVC material. The processing temperature for PA is 250-300 degrees Celsius, and the processing temperature for FEP is 300-400 degrees Celsius. The processing temperature for TPE or PVC is 150-200 degrees Celsius.

[0037] The existing practical factor is that the temperature of the insulation layer 12 is higher than that of the sheath layer 13, so the molten state between the two will delaminate. Ideally, the sheath layer 13 needs to partially melt into the insulation layer 12 to achieve the bonding of the material layers.

[0038] Specifically, the insulation layer 12 and the sheath layer 13 are either double-layer extruded or split-layer extruded. In actual verification, the process integration of simultaneous extrusion is higher, while split extrusion can also achieve the predetermined standard.

[0039] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A cable structure with a composite layer, characterized in that, include: The wire core is composed of a single metal wire core or a number of metal wire cores; An insulating layer is provided, which covers the outer peripheral wall of the wire core. The outer peripheral wall of the insulating layer is provided with a plurality of positioning grooves. Each positioning groove has an opening, and the inner diameter of the opening is smaller than the inner diameter of the positioning groove. A sheath layer is formed on the outer wall of the insulating layer, and the inner wall of the sheath layer is provided with a fitting part that mates with the positioning groove.

2. The cable structure with a composite layer as described in claim 1, characterized in that: The positioning groove of the insulating layer is extruded.

3. The cable structure with a composite layer as described in claim 1, characterized in that: After the insulating layer is extruded, the positioning groove is cut by a milling cutter.

4. The cable structure with a composite layer as described in claim 1, characterized in that: The positioning groove includes a neck groove and an inwardly extending slot, the opening is located in the neck groove, and the inner diameter of the neck groove is smaller than the position of the slot. The fitting part is provided with a neck and a locking part that mate with the neck groove and the locking groove.

5. The cable structure with a composite layer as described in claim 4, characterized in that: The cross-section of the card slot is rectangular or triangular.

6. The cable structure with a composite layer as described in claim 5, characterized in that: When the card slot is triangular, the two sides of the card slot are curved surfaces or vertical surfaces.

7. The cable structure with a composite layer as described in claim 5, characterized in that: When the card slot is rectangular, the neck slot is also rectangular.

8. The cable structure with a composite layer as described in claim 5, characterized in that: The positioning grooves are distributed circumferentially along the outer wall of the insulation layer, and the positioning grooves are arranged through the cable along its length.

9. The cable structure with a composite layer as described in claim 5, characterized in that: The insulation layer is made of PA or FEP material, and the sheath layer is made of TPE or PVC material.

10. The cable structure with a composite layer as described in claim 9, characterized in that: The insulation layer and sheath layer are either double-layer extruded or separately extruded.

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