Surface coloring double-layer co-extrusion die for cross-linked polyethylene insulated cable

Abstract

The utility model relates to cable production technical field, and disclose a kind of surface coloring double-layer co-extrusion mould of crosslinked polyethylene insulated cable, including mould cover, bottom plate and coloring assembly.The utility model can effectively fully disperse and mix coloring material in molten state by spiral runner, make it realize complete uniform distribution in mouth mould, fundamentally solve the problem of uneven color distribution and the defect of " wiring mark " commonly seen in traditional process, simultaneously by servo motor driving rotating rod rotation, and then drive gear rotation, gear and gear ring meshing ensure that mouth mould can realize stable, uniform rotational motion, through the collaborative work of multistage transmission system, not only improve the reliability of mechanical transmission, further enhance the uniformity and stability of dyeing process, so that the color quality of final product is significantly improved, realize the optimization and upgrading of dyeing process.

Description

Technical Field

[0001] This utility model relates to the field of cable production technology, specifically to a surface coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables. Background Technology

[0002] Cross-linked polyethylene insulated cables are widely used in the power transmission field due to their excellent electrical properties, heat resistance, and mechanical strength. During the cable manufacturing process, in order to meet the requirements of identification, aesthetics, or functionality, it is often necessary to color the surface. Traditional coloring processes mostly use single-layer extrusion molds or surface coating methods, which have obvious technical limitations: on the one hand, the colorant is unevenly distributed inside the flow channel, which can easily lead to defects such as "connection marks" and color differences on the surface of the final product; on the other hand, static extrusion mode is difficult to achieve uniform coverage of the coloring layer in the circumferential direction, especially in large-diameter or high-speed extrusion processes.

[0003] To improve color uniformity, existing technologies have attempted to employ rotating die structures, using the periodic rotation of the die to eliminate flow-direction color differences. However, such devices often rely on simple mechanical transmissions or hydraulic drives, resulting in poor rotational stability, low transmission accuracy, and easy wear. This leads to significant fluctuations in the color layer thickness and insufficient long-term operational reliability. Furthermore, the lack of an effective dispersion and mixing mechanism after the colorant is injected into the mold makes it difficult to fundamentally solve the problem of pigment agglomeration or uneven distribution. To address this, a surface-coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a double-layer co-extrusion mold for surface coloring of cross-linked polyethylene insulated cables, which solves the technical problems of significant fluctuations in the thickness of the coloring layer and the lack of an effective dispersion and mixing mechanism in traditional devices. This achieves the goal of enhancing the uniformity and stability of the dyeing process and significantly improving the color quality of the final product.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-layer co-extrusion mold for surface coloring of cross-linked polyethylene insulated cables, comprising a mold sleeve, a base plate, and a coloring component. The base plate is disposed at the lower end of the mold sleeve, and the coloring component is disposed inside the mold sleeve. The coloring component includes a spiral flow channel, which is opened inside the mold sleeve. A die is rotatably connected to the front end of the inner wall of the mold sleeve, and a gear ring is fixedly connected to the outer wall of the rear end of the die. A through groove is opened at the front end of the bottom surface of the inner wall of the mold sleeve. A connecting plate is fixedly connected to the lower surface of the mold sleeve near the front end, and a servo motor is fixedly connected to the outer wall of the front end of the connecting plate. A rotating rod is fixedly connected to the output end of the servo motor, and a gear is fixedly connected to the output end of the rotating rod. The upper end of the gear is in the through groove, and the gear meshes with the gear ring.

[0006] Preferably, a connecting sleeve is fixedly connected to the outer wall of the front end of the mold sleeve, a limit block is fixedly connected to the inner bottom surface of the connecting sleeve, an electric telescopic rod is fixedly connected to the upper end of the connecting sleeve, and a limit plate is fixedly connected to the output end of the electric telescopic rod. The limit plate can be raised and lowered by the electric telescopic rod, which works with the limit block to limit the cable.

[0007] Preferably, a connecting shell is fixedly connected to the outer wall of the rear end of the mold sleeve, and a plurality of heating wires are provided on the inner wall of the connecting shell. A plurality of exhaust holes are opened on the inner wall of the connecting shell. A blower is provided on the rear end of the upper surface of the base plate. The exhaust end of the blower passes through a pipe to the inner wall of the connecting shell. The heating wires can heat the air entering the connecting shell into hot air, and the blower can generate airflow.

[0008] Preferably, a feeding pipe is fixedly connected to the rear end of the upper surface of the mold sleeve, and an electromagnetic control valve is provided in the middle of the feeding pipe. Dye can be fed through the feeding pipe, and the electromagnetic control valve can control the opening and closing of the feeding pipe, which also facilitates the control of the dye flow rate.

[0009] Preferably, the feeding pipe is connected to the spiral flow channel, and support plates are fixedly connected to both sides of the lower surface of the mold sleeve. The lower surface of the support plates is fixedly connected to the base plate, and the mold sleeve can be supported by the support plates.

[0010] Preferably, a control panel is fixedly connected to the middle of one side of the upper surface of the base plate. The servo motor, electric telescopic rod, heating wire, blower and electromagnetic control valve are all electrically connected to the control panel. The control panel facilitates operation by the staff, and the electrical connection facilitates signal transmission and reception.

[0011] This invention provides a double-layer co-extrusion mold for surface coloring of cross-linked polyethylene insulated cables. It has the following advantages: (1) This utility model can effectively disperse and mix the molten colorant through the spiral flow channel, so that it can be completely and evenly distributed in the die. This fundamentally solves the problems of "connection marks" and uneven color distribution that are common in traditional processes. At the same time, the servo motor drives the rotating rod to rotate, which in turn drives the gear to rotate. The meshing of the gear and the gear ring ensures that the die can achieve stable and uniform rotation. Through the coordinated work of the multi-stage transmission system, not only is the reliability of mechanical transmission improved, but the uniformity and stability of the dyeing process are further enhanced, so that the color quality of the final product is significantly improved, and the dyeing process is optimized and upgraded.

[0012] (2) This utility model generates a strong airflow through a blower. When this airflow passes through the inside of the connecting shell, the room temperature airflow is rapidly heated to the set temperature under the high temperature of the heating wire, and then transformed into a stable hot airflow. Finally, the heated hot air is discharged through the exhaust hole to form a directional hot air bundle, which is precisely aimed at the surface of the cable that has completed the coloring process, so as to achieve a fast and uniform drying effect. Attached Figure Description

[0013] Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a schematic diagram of the orthographic section of the present invention; Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0014] In the diagram: 1. Mold sleeve; 2. Base plate; 3. Coloring component; 31. Spiral flow channel; 32. Die; 33. Gear ring; 34. Through groove; 35. Connecting plate; 36. Servo motor; 37. Rotating rod; 38. Gear; 4. Connecting sleeve; 5. Limiting block; 6. Electric telescopic rod; 7. Limiting plate; 8. Connecting shell; 9. Heating wire; 10. Exhaust hole; 11. Blower; 12. Feeding pipe; 13. Electromagnetic control valve; 14. Support plate; 15. Control panel. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Example

[0017] A preferred embodiment of the surface-coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables provided by this utility model is, for example... Figure 1-4As shown: A surface coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables includes a mold sleeve 1, a base plate 2, and a coloring component 3. The base plate 2 is disposed at the lower end of the mold sleeve 1, and the coloring component 3 is disposed inside the mold sleeve 1. The coloring component 3 includes a spiral flow channel 31, which is opened inside the mold sleeve 1. A die 32 is rotatably connected to the front end of the inner wall of the mold sleeve 1, and a gear ring 33 is fixedly connected to the outer wall of the rear end of the die 32. A through groove 34 is opened at the front end of the inner bottom surface of the mold sleeve 1. A connecting plate 35 is fixedly connected to the lower surface of the mold sleeve 1 near the front end, and a servo motor 36 is fixedly connected to the outer wall of the front end of the connecting plate 35. A rotating rod 37 is fixedly connected to the output end of the servo motor 36, and a gear 38 is fixedly connected to the output end of the rotating rod 37. The upper end of the gear 38 is in the through groove 34, and the gear 38 meshes with the gear ring 33.

[0018] Furthermore, in this embodiment, the spiral flow channel 31 effectively disperses and mixes the molten colorant, ensuring a completely uniform distribution within the die 32. This fundamentally solves the common problems of "connection marks" and uneven color distribution in traditional processes. Simultaneously, the servo motor 36 drives the rotating rod 37 to rotate, which in turn drives the gear 38 to rotate. The engagement of the gear 38 with the gear ring 33 ensures that the die 32 can achieve stable and uniform rotational motion. Through the coordinated work of the multi-stage transmission system, not only is the reliability of the mechanical transmission improved, but the uniformity and stability of the dyeing process are further enhanced, resulting in a significant improvement in the color quality of the final product and achieving an optimized upgrade of the dyeing process. Example

[0019] Based on Embodiment 1, a preferred embodiment of the surface-coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables provided by this utility model is, for example... Figure 1-4 As shown: A connecting sleeve 4 is fixedly connected to the outer wall of the front end of the mold sleeve 1, a limit block 5 is fixedly connected to the inner bottom surface of the connecting sleeve 4, an electric telescopic rod 6 is fixedly connected to the upper end of the connecting sleeve 4, and a limit plate 7 is fixedly connected to the output end of the electric telescopic rod 6. A connecting shell 8 is fixedly connected to the outer wall of the rear end of the mold sleeve 1. Multiple heating wires 9 are provided on the inner wall of the connecting shell 8. Multiple exhaust holes 10 are opened on the inner wall of the connecting shell 8. A blower 11 is provided at the rear end of the upper surface of the base plate 2. The exhaust end of the blower 11 passes through a pipe to the inner wall of the connecting shell 8. A feeding pipe 12 is fixedly connected to the rear end of the upper surface of the mold sleeve 1, and an electromagnetic control valve 13 is provided in the middle of the feeding pipe 12; The feeding pipe 12 is connected to the spiral flow channel 31. Support plates 14 are fixedly connected to both sides of the lower surface of the mold sleeve 1. The lower surface of the support plates 14 is fixedly connected to the base plate 2. A control panel 15 is fixedly connected to the middle of one side of the upper surface of the base plate 2. The servo motor 36, electric telescopic rod 6, heating wire 9, blower 11 and electromagnetic control valve 13 are all electrically connected to the control panel 15.

[0020] Furthermore, in this embodiment, a strong airflow is generated by the blower 11. When this airflow passes through the inside of the connecting shell 8, the room temperature airflow is rapidly heated to the set temperature under the high temperature of the heating wire 9, and is transformed into a stable hot airflow. Finally, the heated hot air is concentrated and discharged through the exhaust hole 10, forming a directional hot air jet, which is precisely aimed at the surface of the cable that has completed the coloring process, to achieve a fast and uniform drying effect.

[0021] In use, the cable to be colored is placed into the connecting sleeve 4, and the cable is limited by the limit plate 7 and the limit block 5 driven by the electric telescopic rod 6. Then, dye is added into the feeding pipe 12, and the flow rate of dye is controlled by the electromagnetic control valve 13. When the cable passes through the die 32, the dye can effectively disperse and mix the molten colorant through the spiral flow channel 31, so that it can be completely and evenly distributed in the die 32. This solves the problems of "connection marks" and uneven color distribution that are common in traditional processes. At the same time, the servo motor 36 drives the rotating rod 37 to rotate, which in turn drives the gear 38 to rotate. The gear 38 meshes with the gear ring 33 to ensure that the die 32 can achieve stable and uniform rotation. Through the coordinated work of the multi-stage transmission system, the reliability of mechanical transmission is improved, and the uniformity and stability of the dyeing process are further enhanced, so that the color quality of the final product is significantly improved, and the dyeing process is optimized and upgraded. When the colored cable enters the connecting shell 8, a strong airflow is generated by the blower 11. As this airflow passes through the inside of the connecting shell 8, the room temperature airflow is rapidly heated to the set temperature by the high temperature of the heating wire 9, and then transformed into a stable hot airflow. Finally, the heated hot air is concentrated and discharged through the exhaust hole 10, forming a directional hot air jet, which is precisely aimed at the surface of the cable that has completed the coloring process, achieving a fast and uniform drying effect, thereby completing the coloring work of the cable.

[0022] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A surface-coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables, comprising a mold sleeve (1), a base plate (2), and a coloring component (3), characterized in that: The base plate (2) is set at the lower end of the mold sleeve (1), the coloring component (3) is set inside the mold sleeve (1), the coloring component (3) includes a spiral flow channel (31), the spiral flow channel (31) is opened inside the mold sleeve (1), the front end of the inner wall of the mold sleeve (1) is rotatably connected to a die (32), the outer wall of the rear end of the die (32) is fixedly connected to a gear ring (33), the front end of the inner bottom surface of the mold sleeve (1) is provided with a through groove (34), the lower surface of the mold sleeve (1) near the front end is fixedly connected to a connecting plate (35), the outer wall of the front end of the connecting plate (35) is fixedly connected to a servo motor (36), the output end of the servo motor (36) is fixedly connected to a rotating rod (37), the output end of the rotating rod (37) is fixedly connected to a gear (38), the upper end of the gear (38) is in the through groove (34), and the gear (38) meshes with the gear ring (33).

2. The surface coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables according to claim 1, characterized in that: A connecting sleeve (4) is fixedly connected to the outer wall of the front end of the mold sleeve (1). A limiting block (5) is fixedly connected to the inner bottom surface of the connecting sleeve (4). An electric telescopic rod (6) is fixedly connected to the upper end of the connecting sleeve (4). A limiting plate (7) is fixedly connected to the output end of the electric telescopic rod (6).

3. The surface coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables according to claim 1, characterized in that: A connecting shell (8) is fixedly connected to the outer wall of the rear end of the mold (1). A plurality of heating wires (9) are provided on the inner wall of the connecting shell (8). A plurality of exhaust holes (10) are opened on the inner wall of the connecting shell (8). A blower (11) is provided on the rear end of the upper surface of the base plate (2). The exhaust end of the blower (11) passes through a pipe to the inner wall of the connecting shell (8).

4. The surface coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables according to claim 1, characterized in that: The rear end of the upper surface of the mold (1) is fixedly connected to a feeding pipe (12), and an electromagnetic control valve (13) is provided in the middle of the feeding pipe (12).

5. The surface coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables according to claim 4, characterized in that: The feeding pipe (12) is connected to the spiral flow channel (31), and the support plate (14) is fixedly connected to both sides of the lower surface of the mold sleeve (1). The lower surface of the support plate (14) is fixedly connected to the base plate (2).

6. The surface coloring double-layer co-extrusion mold for cross-linked polyethylene insulated cables according to claim 1, characterized in that: A control panel (15) is fixedly connected to the middle of one side of the upper surface of the base plate (2). The servo motor (36), electric telescopic rod (6), heating wire (9), blower (11) and electromagnetic control valve (13) are all electrically connected to the control panel (15).

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