A new conductor three-layer co-extrusion die and a new conductor

Abstract

The utility model discloses a novel conductor three layer co -extrusion mould and novel conductor, novel conductor three layer co -extrusion mould includes mould body and the mould core of detachable setting on mould body, be equipped with conductor export on the mould body, the mould core includes mould core body and the extrusion channel in the middle part of mould core body, the diameter of extrusion channel is slightly greater than the diameter of conductor export, and the inner wall of extrusion channel is coated with the nanometer coating of reducing the friction between conductor and extrusion channel, has reduced the friction between conductor and mould in the production process greatly, has solved the problem of conductor burr and die mouth aluminum powder accumulation because of friction.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a novel three-layer co-extrusion die for conductors and a novel conductor. Background Technology

[0002] In recent years, with the emphasis and investment in power infrastructure construction, such as the advancement of smart grid construction and urban power grid transformation projects, the power cable industry has been driven towards high performance, environmental protection, and intelligence. Shaped conductor power cables, with their advantages, are highly competitive in these trends and are expected to occupy a larger market share. Therefore, shaped conductor power cables have broad market prospects and continuously growing demand, and will be widely used in the following fields.

[0003] 1. Construction Sector: With the acceleration of urbanization, large-scale buildings such as high-rise buildings and commercial complexes are constantly emerging in cities, leading to an increasing demand for power cables. Shaped conductor power cables are characterized by their small outer diameter and ease of installation, making them suitable for complex wiring environments within buildings. Furthermore, their excellent fire resistance and flame retardant properties meet the requirements of building fire safety.

[0004] 2. Industrial Sector: As industrial production becomes increasingly automated and intelligent, the demands for the reliability and stability of power supply are also rising. Corrugated conductor power cables can meet the requirements of industrial production for high strength, wear resistance, and corrosion resistance, and are widely used in industries such as metallurgy, chemical engineering, and machinery manufacturing.

[0005] 3. New Energy Sector: The rapid development of new energy industries, such as photovoltaic power generation, wind power generation, and energy storage systems, is constantly increasing the demand for power cables. Corrugated conductor power cables have good adaptability in the new energy sector and can meet the requirements of new energy power generation systems for high weather resistance, UV resistance, and low loss.

[0006] Currently, conventional conductors have the following problems during extrusion molding:

[0007] 1. Conventional round compacted conductors have a relatively large outer diameter, resulting in low cross-linking production efficiency.

[0008] Currently, power cable conductors generally use a round, tightly stranded structure, and power grid companies mandate a conductor compaction coefficient of no less than 0.9 during bidding. However, in actual production, even when the cable conductor resistance meets the requirements, the gaps between the individual filaments in each layer of the conductor are still relatively large, resulting in an overall conductor outer diameter that is too large. During cross-linking production, the actual extruder speeds are too high. To ensure the quality of the cross-linked core products, the production speed must be appropriately reduced, leading to low cross-linking production efficiency.

[0009] 2. Burrs on aluminum conductors and material accumulation at the die opening during cross-linking production.

[0010] Due to the material properties, aluminum conductors are susceptible to external factors during actual production and application, leading to scratches and burrs on the conductor surface. During the cross-linking process, prolonged contact and friction between the aluminum conductor and the mold causes aluminum powder to accumulate at the mold opening. Over time, this aluminum powder deposit can enter the insulation along with the conductor, resulting in substandard electrical performance of the insulated wire core and compromised product quality. Utility Model Content

[0011] To solve the above technical problems, this utility model provides a novel three-layer co-extrusion die for conductors and a novel conductor, which significantly reduces the friction between the conductor and the die during the production process and solves the problems of conductor burrs and aluminum powder accumulation at the die opening caused by friction.

[0012] The present invention adopts the following technical solution:

[0013] A novel three-layer co-extrusion die for conductors includes a die body and a die core detachably mounted on the die body. The die body has a conductor outlet, and the die core includes a die core body and an extrusion channel located in the middle of the die core body. The diameter of the extrusion channel is slightly smaller than the diameter of the conductor outlet, and the inner wall of the extrusion channel is coated with a nano-coating to reduce the friction between the conductor and the extrusion channel. The nano-coating on the inner wall of the die core significantly reduces the friction between the conductor (especially aluminum conductors) and the die, fundamentally solving the problems of burrs caused by conductor surface scratches and insulation layer contamination caused by aluminum powder accumulation. In addition, the diameter of the extrusion channel is slightly smaller than the conductor outlet, which avoids the conductor from being squeezed and rubbed against the conductor outlet, and ensures the conductor size stability, providing a foundation for subsequent multi-layer co-extrusion.

[0014] Preferably, the nano-coating is an oxide film with a thickness between 0.03 mm and 0.04 mm, which ensures a low coefficient of friction without affecting the dimensional accuracy of the conductor.

[0015] Preferably, the diameter of the extrusion channel is 0.6 mm smaller than the diameter of the conductor outlet to prevent friction between the conductor and the conductor outlet.

[0016] Preferably, the extrusion channel has a guide section on one side to reduce impact upon entering the mold and avoid damage to the surface of the aluminum conductor.

[0017] Preferably, the guide portion is a linear inclined surface, an arc-shaped inclined surface, or a combination of a linear inclined surface and an arc-shaped inclined surface.

[0018] Preferably, the mold body is provided with an installation part, and the mold core is connected to the installation part by a thread, which facilitates the installation and disassembly of the mold core.

[0019] A novel conductor is extruded using a novel three-layer co-extrusion die, comprising a first conductor layer, a second conductor layer disposed outside the first conductor layer, and a third conductor layer disposed outside the second conductor layer. By optimizing the compression coefficient of the profiled conductor, the cross-sectional area can be reduced while meeting the same resistance requirements, thereby directly reducing the cable volume and material cost.

[0020] Preferably, the first conductor layer has a circular cross-section; the second and third conductor layers are each composed of several second and third sub-conductors with fan-shaped cross-sections, respectively. The fan-shaped structure is tightly fitted to reduce the interlayer gap and further reduce the outer diameter of the conductor.

[0021] Preferably, the cross-sections of the second and third conductor layers are both annular structures, and the adjacent conductor layers are tightly bonded with small gaps.

[0022] Preferably, the outer side of the third conductor layer is provided with a conductor shielding layer, an insulating layer, and an insulating shielding layer.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. The inner wall of the extrusion channel is coated with a nano-coating that reduces the friction between the conductor and the extrusion channel; the nano-coating on the inner wall of the die core significantly reduces the friction between the conductor (especially the aluminum conductor) and the die, fundamentally solving the problems of burrs caused by conductor surface scratches and insulation layer contamination caused by aluminum powder accumulation.

[0025] 2. In addition, the diameter of the extrusion channel is slightly smaller than that of the conductor outlet, which avoids the conductor from being squeezed and rubbed against the conductor outlet, and ensures the stability of the conductor size, thus providing a basis for subsequent multi-layer co-extrusion.

[0026] 3. The conductor is designed as a tightly connected three-layer structure, which significantly improves the conductor compression coefficient while meeting the conductor resistance requirements, and substantially reduces the actual electrical cross-sectional area of ​​the conductor and the outer diameter of the cable, thereby significantly improving production efficiency and reducing labor intensity and material costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the mold body.

[0028] Figure 2 This is a schematic diagram of the mold core structure.

[0029] Figure 3 This is a schematic diagram of a conductor.

[0030] In the figure, mold body 1, conductor outlet 1-1, mounting part 1-2, mold core 2, mold core body 2-1, extrusion channel 2-2, guide part 2-3, first conductor layer 3, second conductor layer 4, second sub-conductor 4-1, third conductor layer 5, third sub-conductor 5-1, conductor shielding layer 6, insulation layer 7, and insulation shielding layer 8. Detailed Implementation

[0031] To facilitate understanding of the technical solution of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figure 1-2 As shown, a novel three-layer co-extrusion die for conductors includes a die body 1 and a die core 2 detachably mounted on the die body 1. The die body 1 has a conductor outlet 1-1. The die core 2 includes a die core body 2-1 and an extrusion channel 2-2 located in the middle of the die core body 2-1. The diameter of the extrusion channel 2-2 is slightly smaller than the diameter of the conductor outlet 1-1, and the inner wall of the extrusion channel 2-2 is coated with a nano-coating that reduces the friction between the conductor and the extrusion channel 2-2. The nano-coating on the inner wall of the die core significantly reduces the friction between the conductor (especially the aluminum conductor) and the die, fundamentally solving the problems of burrs caused by conductor surface scratches and insulation layer contamination caused by aluminum powder accumulation. In addition, the diameter of the extrusion channel is slightly smaller than that of the conductor outlet, which avoids the conductor from being squeezed and rubbed against the conductor outlet 1-1, and ensures the stability of the conductor dimensions, providing a foundation for subsequent multi-layer co-extrusion.

[0033] The nano-coating is an oxide film with a thickness between 0.03 mm and 0.04 mm, which ensures a low coefficient of friction without affecting the dimensional accuracy of the conductor.

[0034] The diameter of the extrusion channel 2-2 is 0.6 mm smaller than the diameter of the conductor outlet 1-1 to prevent friction between the conductor and the conductor outlet 1-1.

[0035] The extrusion channel 2-2 has a guide section 2-3 on one side to reduce the impact upon entering the mold and avoid damage to the surface of the aluminum conductor.

[0036] The guide section 2-3 is a linear inclined surface, an arc-shaped inclined surface, or a combination of a linear inclined surface and an arc-shaped inclined surface.

[0037] The mold body 1 is provided with an installation part 1-2, and the mold core 2 is connected to the installation part 1-2 by a thread, which facilitates the installation and disassembly of the mold core 2.

[0038] A novel conductor is extruded using a novel three-layer co-extrusion die, comprising a first conductor layer 3, a second conductor layer 4 disposed outside the first conductor layer 3, and a third conductor layer 5 disposed outside the second conductor layer 4. By optimizing the compression coefficient of the profiled conductor, the cross-sectional area is reduced to meet the same resistance requirements, thereby directly reducing the cable volume and material cost.

[0039] The first conductor layer 3 has a circular cross-section; the second conductor layer 4 and the third conductor layer 5 are respectively composed of several second sub-conductors 4-1 and third sub-conductors 5-1 with fan-shaped cross-sections. The fan-shaped structure is tightly fitted, reducing the interlayer gap and further reducing the outer diameter of the conductor.

[0040] The cross-sections of the second conductor layer 4 and the third conductor layer 5 are both annular structures, and the adjacent conductor layers are tightly bonded with small gaps.

[0041] In this embodiment, the second conductor layer 4 includes six second sub-conductors 4-1, and the inner rings of the six second sub-conductors 4-1 are tightly attached to the surface of the first conductor layer 3; the third conductor layer 5 includes twelve third sub-conductors 5-1, and the inner rings of the third sub-conductors 5-1 are tightly attached to the surface of the second sub-conductors 4-1. In actual use, the number of second sub-conductors 4-1 and third sub-conductors 5-1 can be set according to specific needs.

[0042] The outer side of the third conductor layer 5 is provided with a conductor shielding layer 6, an insulating layer 7, and an insulating shielding layer 8.

[0043] The above are merely preferred embodiments of this utility model. The scope of protection of this utility model is defined by the scope of the claims. Any improvements and modifications made by those skilled in the art without departing from the spirit and scope of this utility model should also be considered as protection within the scope of this utility model.

Claims

1. A novel three-layer co-extrusion die for conductors, characterized in that, The device includes a mold body (1) and a mold core (2) detachably mounted on the mold body (1); the mold body (1) is provided with a conductor outlet (1-1), and the mold core (2) includes a mold core body (2-1) and an extrusion channel (2-2) located in the middle of the mold core body (2-1). The diameter of the extrusion channel (2-2) is slightly smaller than the diameter of the conductor outlet (1-1), and the inner wall of the extrusion channel (2-2) is coated with a nano-coating to reduce the friction between the conductor and the extrusion channel (2-2).

2. The novel conductor three-layer co-extrusion die according to claim 1, characterized in that, The nano-coating is an oxide film with a thickness between 0.03 mm and 0.04 mm.

3. The novel conductor three-layer co-extrusion die according to claim 1, characterized in that, The diameter of the extrusion channel (2-2) is 0.6 mm smaller than the diameter of the conductor outlet (1-1).

4. The novel conductor three-layer co-extrusion die according to claim 1, characterized in that, The extrusion channel (2-2) has a guide section (2-3) on one side.

5. The novel conductor three-layer co-extrusion die according to claim 4, characterized in that, The guide section (2-3) is a linear inclined surface, an arc-shaped inclined surface, or a combination of a linear inclined surface and an arc-shaped inclined surface.

6. The novel conductor three-layer co-extrusion die according to claim 1, characterized in that, The mold body (1) is provided with an installation part (1-2), and the mold core (2) is connected to the installation part (1-2) by a thread.

7. A novel conductor, characterized in that, The novel conductor three-layer co-extrusion die according to any one of claims 1-6 is used for extrusion, including a first conductor layer (3), a second conductor layer (4) disposed outside the first conductor layer (3), and a third conductor layer (5) disposed outside the second conductor layer (4).

8. The novel conductor according to claim 7, characterized in that, The first conductor layer (3) has a circular cross-section; the second conductor layer (4) and the third conductor layer (5) are respectively composed of a number of second sub-conductors (4-1) and third sub-conductors (5-1) with fan-shaped cross-sections.

9. The novel conductor according to claim 8, characterized in that, The cross-sections of the second conductor layer (4) and the third conductor layer (5) are both annular structures.

10. The novel conductor according to claim 7, characterized in that, The third conductor layer (5) is provided with a conductor shielding layer (6), an insulating layer (7) and an insulating shielding layer (8) on its outer side.

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