A double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables

Abstract

This utility model discloses a double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables, relating to the field of cable processing technology. The utility model includes a first cable guide tube, a second cable guide tube fixedly connected to one side of the first cable guide tube, and a cable inlet head fixedly connected to one side of the first cable guide tube. An annular extrusion mechanism is provided on one side of the cable inlet head, including a guide hole formed on the inner surface of the first cable guide tube. Through the cooperation of the annular extrusion mechanism and the guide mechanism, this utility model uses the guide hole to uniformly guide the insulating and corrosion-resistant materials onto the cable surface, avoiding the problem of uneven material distribution in traditional technologies. This ensures the integrity of the cable's layered structure, significantly improving corrosion resistance and insulation performance. The semi-annular storage tank and guide tube allow for the collection and recycling of excess insulating and corrosion-resistant materials, effectively preventing material mixing and reducing resource waste.

Description

Technical Field

[0001] This utility model belongs to the field of cable processing technology, and in particular relates to a double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables. Background Technology

[0002] Corrosion-resistant cables are a type of cable specifically designed to withstand harsh environments such as chemical corrosion, humidity, and high temperatures. They are widely used in chemical plants, marine environments, underground pipelines, and other highly corrosive applications. To ensure the long-term stability and reliability of the cable, its outer sheath typically needs to possess excellent corrosion resistance and mechanical strength. During the production process, double-layer co-extrusion dies with double-layer co-extrusion technology are widely used, simultaneously extruding the insulation and corrosion-resistant layers to improve the overall performance of the cable and production efficiency.

[0003] A utility patent application with publication number CN215095491U discloses a double-layer co-extrusion die head for zoned temperature control of anti-corrosion cables. The die includes a cable guide tube covered with a protective sleeve. Partitions are fixedly connected to both the front and rear sides of the cable guide tube, and the partitions are fixedly connected to the inner wall of the protective sleeve. A first feed hole is opened at the lower left side of the cable guide tube, and a second feed hole is opened at the middle of the top of the cable guide tube. The first and second feed holes enable double-layer coating, facilitating the simultaneous coating of the cable with an insulation layer and an anti-corrosion layer. This improves cable production efficiency and reduces production costs. Furthermore, the extrusion head is detachable, facilitating the production of cables of different specifications, making it very convenient to use.

[0004] While the above technical solution achieves double-layer cable production, uneven distribution of the insulation and anti-corrosion materials can easily occur during the coating process, as both the first and second feed holes are located on only one side of the cable. This results in some areas of the cable surface not being completely covered. To achieve full coverage, the cable hole would need to be filled with both insulation and anti-corrosion materials, but this would cause the insulation and anti-corrosion materials to mix, disrupting the layered structure and affecting the cable's performance.

[0005] To address these issues, we provide a double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables. Utility Model Content

[0006] The purpose of this invention is to provide a double-layer co-extrusion die for corrosion-resistant cables with zoned temperature control. Through the cooperation of the annular extrusion mechanism and the guiding mechanism, the problem of poor coating effect in the existing double-layer co-extrusion die is solved.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to a double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables, comprising a first cable guide tube, a second cable guide tube fixedly connected to one side of the first cable guide tube, and a cable inlet head fixedly connected to one side of the first cable guide tube; an annular extrusion mechanism is provided on one side of the cable inlet head, the annular extrusion mechanism including a guide hole opened on the inner surface of the first cable guide tube and an annular material cavity opened on the surface of the first cable guide tube; a guide mechanism is provided on one side of the annular material cavity, the guide mechanism including a semi-annular storage trough opened at the bottom of the first cable guide tube, and a guide tube connected to the bottom of the semi-annular storage trough.

[0009] The present invention is further configured such that the annular extrusion mechanism includes a connecting pipe communicating with the top of the annular material filling cavity, and the surface of the connecting pipe is provided with connecting threads.

[0010] The present invention is further configured such that an annular heating plate is fixedly connected to the surface of the first conduit, and an annular heat-insulating shell is provided on the surface of the annular heating plate.

[0011] The present invention is further configured such that a connecting plate is fixedly connected to one side of both the first conduit and the second conduit, and a mounting hole is provided on the top of the connecting plate.

[0012] The present invention is further configured such that an inlet hole is provided on one side of the inlet head, and the guide hole is connected to the annular material cavity.

[0013] The present invention is further configured such that a forming head is fixedly connected to one side of the second conduit, and a wire outlet hole is provided on one side of the forming head.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model, through the cooperation of annular extrusion mechanism and guiding mechanism, uses guiding holes to uniformly guide insulating and anti-corrosion materials to the cable surface, avoiding the problem of uneven material distribution in traditional technology, ensuring the integrity of the cable's layered structure, and significantly improving corrosion resistance and insulation performance. The semi-annular storage tank and guiding pipe can collect and recycle excess insulating and anti-corrosion materials, effectively avoiding mixing between materials and reducing resource waste.

[0016] 2. This utility model, through the combined use of an annular heating plate and an annular insulation shell, can maintain a stable material temperature, prevent premature solidification, and ensure the continuity and uniformity of the coating process, thereby improving the production quality of the cable. The design of the connecting plate and mounting holes makes the installation and fixing of the die head more convenient. At the same time, the setting of the forming head and the cable outlet hole ensures the smooth passage of the cable, improving production efficiency. Through the design of zoned temperature control and double-layer co-extrusion, it is suitable for the production of cables of different specifications and can meet the anti-corrosion requirements in various harsh environments, with high practicality and flexibility.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional view of a double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables.

[0020] Figure 2 This is a cross-sectional view of the second conduit in a double-layer co-extrusion die for a corrosion-resistant cable with zoned temperature control.

[0021] Figure 3 This is a cross-sectional view of the annular material cavity in a double-layer co-extrusion die for a corrosion-resistant cable with zoned temperature control.

[0022] Figure 4 This is a cross-sectional view of the annular insulation shell in a double-layer co-extrusion die for a corrosion-resistant cable with zoned temperature control.

[0023] Figure 5 This is a cross-sectional view of the first conduit in a double-layer co-extrusion die for a corrosion-resistant cable with zoned temperature control.

[0024] In the attached diagram: 1. First cable guide tube; 2. Second cable guide tube; 3. Cable inlet head; 4. Material guide hole; 5. Annular material filling cavity; 6. Semi-annular material storage tank; 7. Material guide pipe; 8. Connecting pipe; 9. Annular heating plate; 10. Annular insulation shell; 11. Cable inlet hole; 12. Forming head; 13. Cable outlet hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0026] Please see Figures 1-5This utility model relates to a double-layer co-extrusion die for zoned temperature control of anti-corrosion cables. It includes a first cable guide tube 1, which is used for coating the cable insulation material and serves as the main channel for extruding the insulation layer. A second cable guide tube 2 is fixedly connected to one side of the first cable guide tube 1. The second cable guide tube 2 is also used for coating the cable with anti-corrosion material and serves as the main channel for extruding the anti-corrosion layer. The structure of the second cable guide tube 2 is identical to that of the first cable guide tube 1. An inlet head 3 is fixedly connected to one side of the first cable guide tube 1, guiding the cable into the die and ensuring that the cable passes through in the center. An annular extrusion mechanism is provided on one side of the inlet head 3. The annular extrusion mechanism includes components opened at... The material guide hole 4 on the inner surface of the first conduit 1 evenly guides the material in the annular material cavity 5 to the cable surface, avoiding material loss. The annular material cavity 5, located on the surface of the first conduit 1, temporarily stores insulating or anti-corrosion materials to ensure a stable material supply. A material guiding mechanism is provided on one side of the annular material cavity 5. The material guiding mechanism includes a semi-annular storage tank 6 located at the bottom of the first conduit 1. The semi-annular storage tank 6 collects excess insulating or anti-corrosion materials to avoid waste. A material guide pipe 7 connected to the bottom of the semi-annular storage tank 6 guides the excess material out and recycles it, improving material utilization. Example

[0027] Please see Figures 1-5 Based on Embodiment 1, the annular extrusion mechanism further includes a connecting pipe 8 connected to the top of the annular material chamber 5. The connecting pipe 8 is connected to an external extruder to transport material to the annular material chamber 5. The surface of the connecting pipe 8 is provided with connecting threads. An annular heating plate 9 is fixedly connected to the surface of the first wire guide pipe 1. The annular heating plate 9 heats the material to prevent it from solidifying prematurely and to ensure the coating effect. An annular heat insulation shell 10 is provided on the surface of the annular heating plate 9. The annular heat insulation shell 10 is fixedly connected to the first wire guide pipe 1. To reduce heat loss and maintain stable material temperature, a connecting plate is fixedly connected to one side of the first wire guide tube 1 and the second wire guide tube 2. The top of the connecting plate has an installation hole. The connecting plate and the installation hole facilitate the installation and fixation of the entire mold head. The wire inlet head 3 has a wire inlet hole 11 on one side. The guide hole 4 is connected to the annular material cavity 5. The second wire guide tube 2 is fixedly connected to one side of the forming head 12. The forming head 12 is used for the cable after final shaping and covering. The forming head 12 has a wire outlet hole 13 on one side to ensure that the cable can pass through smoothly.

[0028] The working principle of this utility model is as follows: First, the die head is fixed in the designated position through the connecting plate and the mounting hole, and the connecting pipe 8 at the top of the first wire guide tube 1 and the second wire guide tube 2 is connected to the two external extruders respectively to ensure that the supply channels of the insulating material and the anti-corrosion material are unobstructed. The cable enters from the wire inlet hole 11 of the wire inlet head 3 and passes through the first wire guide tube 1 and the second wire guide tube 2 in sequence to ensure that the cable passes through in the center, providing a stable foundation for the subsequent wrapping process.

[0029] Two sets of extruders respectively convey insulating and anti-corrosion materials into the annular material chamber 5. The materials are evenly extruded through the guide holes 4, coating the cable surface in layers. The annular design of the guide holes 4 avoids uneven material distribution, ensuring full coverage of the cable surface. During the coating process, excess insulating and anti-corrosion materials enter the semi-annular storage tank 6 and are discharged through the guide pipe 7, realizing the classification, recycling, and reuse of materials and improving resource utilization.

[0030] The annular heating plate 9 heats the material to prevent premature solidification, while the annular insulation shell 10 reduces heat loss, maintains stable material temperature, and ensures the continuity and uniformity of the coating process. The double-coated cable exits through the outlet hole 13 of the forming head 12, completing the final shaping and forming a cable product with excellent corrosion resistance and insulation properties. This solves the problem of poor coating effect in traditional double-layer co-extrusion dies and significantly improves cable production efficiency and quality, showing broad application prospects.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables, comprising a first conduit (1), characterized in that: A second cable conduit (2) is fixedly connected to one side of the first cable conduit (1), and an inlet head (3) is fixedly connected to one side of the first cable conduit (1). The inlet head (3) is provided with an annular extrusion mechanism on one side. The annular extrusion mechanism includes a guide hole (4) opened on the inner surface of the first wire tube (1) and an annular material cavity (5) opened on the surface of the first wire tube (1). A material guiding mechanism is provided on one side of the annular material cavity (5). The material guiding mechanism includes a semi-annular storage tank (6) opened at the bottom of the first wire guide tube (1) and a material guiding pipe (7) connected to the bottom of the semi-annular storage tank (6).

2. The double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables according to claim 1, characterized in that: The annular extrusion mechanism also includes a connecting pipe (8) connected to the top of the annular extrusion cavity (5), and the surface of the connecting pipe (8) is provided with connecting threads.

3. The double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables according to claim 1, characterized in that: An annular heating plate (9) is fixedly connected to the surface of the first conduit (1), and an annular heat preservation shell (10) is provided on the surface of the annular heating plate (9).

4. The double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables according to claim 1, characterized in that: A connecting plate is fixedly connected to one side of both the first conduit (1) and the second conduit (2), and an installation hole is provided on the top of the connecting plate.

5. The double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables according to claim 1, characterized in that: The feed head (3) has a feed hole (11) on one side, and the feed guide hole (4) is connected to the annular feed cavity (5).

6. The double-layer co-extrusion die for zoned temperature control of corrosion-resistant cables according to claim 1, characterized in that: A forming head (12) is fixedly connected to one side of the second conduit (2), and a wire outlet hole (13) is provided on one side of the forming head (12).

Images