A three-color strip equalizing and deviation-preventing device for a double-color sheath of an electric wire and cable

Abstract

The application provides a wire and cable double-color sheath three-color strip uniform distribution deviation prevention device, which comprises a pay-off rack, a tension controller, a double-drawing assembly, a first combining wheel, a single-drawing assembly, a second combining wheel, an extrusion device, a three-color strip uniform distribution extrusion die and a controller, the right side of the pay-off rack is sequentially provided with the tension controller, the double-drawing assembly, the first combining wheel, the single-drawing assembly, the second combining wheel and the extrusion device, the extrusion device is provided with the three-color strip uniform distribution extrusion die at a discharge port, a wire and cable is wound on the pay-off rack, one end of the wire and cable sequentially passes through the tension controller, the double-drawing assembly, the first combining wheel, the single-drawing assembly and the second combining wheel, and extends into the three-color strip uniform distribution extrusion die for extrusion, and the tension controller and the extrusion device are electrically connected with the controller. The wire and cable double-color sheath three-color strip uniform distribution deviation prevention device can realize cable extrusion manufacturing.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a device for preventing deviation of three-color stripes on a two-color sheath of a wire or cable. Background Technology

[0002] In recent years, with the continuous development of power facilities, many new demands have been put forward for the application of wires and cables. Among them, in order to facilitate the intuitive identification of cable application types or safety warnings, the markings on the surface of the cable sheath are required to use two different and contrasting sheath materials for identification. Cables can use single-color stripes or two-color stripes. In some special applications, three color stripes are required to be divided into three equal parts on the sheath surface. Two-color and three-color stripes are evenly distributed at 120° intervals on the surface of the wire and cable sheath. The color markings are clear and easy to distinguish and identify, and have a wide range of applications in special places.

[0003] Currently, there are two drawbacks in the production of two-color and three-color striped cable sheaths: 1. The three-color stripes need to be evenly spaced at 120° intervals on the sheath surface, and the width of the stripes should be consistent, without any inconsistencies. However, because the injection holes for the three colors are located at different positions on the die, the plastic flow channel lengths are different, and the extrusion pressures are varying, it is easy for the two stripes closest to the injection hole to be wider and more deeply embedded in the sheath, while the other stripe is narrower and lighter in color, severely affecting the appearance of the cable product. 2. In the cable extrusion production line, after the cable is unloaded from the unloading rack to the retraction, the cable is suspended between unloading and retraction under tension. Due to cable routing and other factors, there will be some intermittent vibration during unloading. This vibration will cause resonance in the cable. When the cable passes through the extruder head and is covered with sheath material, this resonance vibration will cause a certain degree of displacement of the three colors, affecting the appearance of the cable. Currently, existing technologies mostly employ front-tracked or wheeled traction to clamp the cables and eliminate vibration resonance. However, since the cables remain at a certain horizontal level, clamping reduces resonance but doesn't eliminate it. Furthermore, due to assembly limitations, both tracked and wheeled traction methods maintain a certain distance between the cable outlet and the extruder head outlet, making it impossible to completely eliminate resonance vibration. Therefore, the control effect is not ideal. Thus, designing a device for evenly distributing the three-color stripes on the dual-color sheath of cables to prevent deviation is essential. Summary of the Invention

[0004] The purpose of this invention is to provide a device for preventing deviation of three-color stripes evenly distributed on a two-color sheath for wires and cables. It has a simple structure, is easy to implement, and can be used for cable extrusion manufacturing.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A device for preventing deviation of three-color stripes evenly distributed on a two-color sheath for electric wires and cables includes: a wire feeding frame, a tension controller, a dual traction assembly, a first parallel reel, a single traction assembly, a second parallel reel, an extrusion device, a three-color stripe evenly distributed extrusion die, and a controller. The tension controller, dual traction assembly, first parallel reel, single traction assembly, second parallel reel, and extrusion device are sequentially arranged on the right side of the wire feeding frame. The three-color stripe evenly distributed extrusion die is located at the discharge port of the extrusion device. An electric wire and cable are wound on the wire feeding frame. One end of the electric wire and cable passes sequentially through the tension controller, dual traction assembly, first parallel reel, single traction assembly, and second parallel reel, and extends into the three-color stripe evenly distributed extrusion die for extrusion. The tension controller and extrusion device are electrically connected to the controller.

[0007] Optionally, a height sensing device is provided at the guide wheel of the tension controller. The tension cable drives the tension controller to move up and down through tension. The height sensing device is used to sense the height of the tension controller and is electrically connected to the controller.

[0008] Optionally, the dual traction assembly is an upper and lower wheel type passive dual traction assembly, and the wires and cables passing through the tension controller are arranged in a figure-eight pattern in the groove of the traction wheel of the upper and lower wheel type passive dual traction assembly.

[0009] Optionally, the first and second paralleling pulleys are grid-shaped paralleling pulleys, and the single traction assembly is a wheel-type single traction assembly. The wires and cables passing through the upper and lower wheel-type passive double traction assemblies pass through the first paralleling pulley, the wheel-type single traction assembly, and the second paralleling pulley in sequence, and extend into the three-color stripe evenly distributed extrusion mold. The height of the wheel-type single traction assembly is 20cm higher than the three-color stripe evenly distributed extrusion mold.

[0010] Optionally, the center of the three-color stripe evenly distributed extrusion die has a die bearing area, through which the wires and cables pass. The sidewall of the three-color stripe evenly distributed extrusion die has a first flow channel and a second flow channel arranged sequentially from left to right. Both the first and second flow channels are annular, and their opening directions are opposite. An injection molding machine connection port is located at the center of the first flow channel for connecting to extrusion equipment. An injection diversion port is provided between the injection molding machine connection port and the first flow channel for injection into the first flow channel. The second flow channel has a spacer... The device is provided with a first injection port, a second injection port, and a third injection port evenly spaced at 120° intervals. The ratio of the inner opening diameter to the outer opening diameter of the first and second injection ports is 1:1.5, and the ratio of the inner opening diameter to the outer opening diameter of the third injection port is 1:1.33. A third flow channel is provided at the center of the first and third injection ports to connect the first and second flow channels. In use, the third injection port is located at the bottom of the wire / cable.

[0011] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects: The wire and cable two-color sheath three-color stripe even distribution anti-deviation device provided by the present invention includes a wire feeding frame, a tension controller, a dual traction assembly, a first paralleling wheel, a single traction assembly, a second paralleling wheel, an extrusion equipment, a three-color stripe even distribution extrusion mold and a controller, which can reduce wire feeding vibration, eliminate cable resonance, realize the control of two-color sheath three-color stripe even distribution anti-deviation, and realize cable extrusion manufacturing. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the anti-deviation device for the three-color stripe even distribution of the two-color sheath of the wire and cable according to an embodiment of the present invention;

[0014] Figure 2 A schematic diagram of the first angle structure of the three-color stripe evenly distributed extrusion die sleeve;

[0015] Figure 3 A schematic diagram of the second angle structure of the three-color stripe evenly distributed extrusion die sleeve;

[0016] Figure 4 A schematic diagram of the third angle structure of the three-color stripe evenly distributed extrusion die sleeve;

[0017] Figure 5 This is a schematic diagram of the fourth angle structure of the three-color stripe evenly distributed extrusion die.

[0018] Reference numerals: 1. Pay-off frame; 2. Tension controller; 3. Dual traction assembly; 4. First parallel reel; 5. Single traction assembly; 6. Second parallel reel; 7. Extrusion equipment; 8. Injection molding machine connection port; 9. Second runner; 10. First runner; 11. Injection branch port; 12. Mold sleeve bearing area; 13. Third runner; 14. Third injection port; 15. First injection port; 16. Second injection port. Detailed Implementation

[0019] The purpose of this invention is to provide a device for preventing deviation of three-color stripes evenly distributed on a two-color sheath for wires and cables. It has a simple structure, is easy to implement, and can be used for cable extrusion manufacturing.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown in the figure, the three-color stripe even distribution anti-deviation device for the two-color sheath of wires and cables provided in this embodiment of the invention includes: a wire feeding frame 1, a tension controller 2, a dual traction assembly 3, a first paralleling wheel 4, a single traction assembly 5, a second paralleling wheel 6, an extrusion device 7, a three-color stripe even distribution extrusion die, and a controller. The tension controller 2, the dual traction assembly 3, the first paralleling wheel 4, the single traction assembly 5, the second paralleling wheel 6, and the extrusion device 7 are arranged sequentially on the right side of the wire feeding frame 1. The three-color stripe even distribution extrusion die is arranged at the discharge port of the extrusion device 7. Wires and cables are wound on the wire feeding frame 1. One end of the wires and cables passes sequentially through the tension controller 2, the dual traction assembly 3, the first paralleling wheel 4, the single traction assembly 5, and the second paralleling wheel 6, and extends into the three-color stripe even distribution extrusion die for extrusion. The tension controller 2 and the extrusion device 7 are electrically connected to the controller.

[0022] The tension controller 2 is equipped with a height sensing device at the wire guide wheel. The tension of the wire and cable drives the tension controller 2 to move up and down. The height sensing device is used to sense the height of the tension controller 2 to quantify the magnitude of the wire tension, changing the method of judging tension based on human experience. It is also linked with the controller. When the tension changes and exceeds the predetermined height, the linkage device will automatically adjust the wire speed to control the tension, so that the tension is always in a stable and controllable state. The height sensing device is electrically connected to the controller.

[0023] The dual traction assembly 3 is an upper and lower wheel type passive dual traction assembly, which is modified from the original parallel wheel type passive dual traction assembly. The wires and cables passing through the tension controller 2 are arranged in a figure-eight shape in the groove of the traction wheel of the upper and lower wheel type passive dual traction assembly. When the wires and cables enter the traction, their running direction is immediately changed, and their running direction is continuously changed through multiple windings. The winding is relatively tight. When the release of the line causes vibration, the resonance of the wires and cables is canceled out by this multiple turning and winding, so that the wires and cables are in a stable state after the release of the traction.

[0024] The first paralleling wheel 4 and the second paralleling wheel 6 are grid-shaped paralleling wheels, and the single traction assembly 5 is a wheel-type single traction assembly. The wires and cables passing through the upper and lower wheel-type passive double traction assemblies pass through the first paralleling wheel 4, the wheel-type single traction assembly 5 and the second paralleling wheel 6 in sequence, and extend into the three-color stripe evenly distributed extrusion mold. The height of the wheel-type single traction assembly is 20cm higher than the three-color stripe evenly distributed extrusion mold, so that the weight of the wires and cables has a point of force.

[0025] This device can minimize the distance between the cable core's stress point and the extrusion die, allowing the cable to sink into the cooling water tank under gravity after the sheathing is completed, thus completing the transition from the cable core to the extrusion sheath at the extrusion head. This further ensures the stability of the cable core when the sheathing material is applied, preventing the extruded color strips from shifting.

[0026] like Figure 2-5As shown, a die-bearing area 12 is provided at the center of the three-color stripe evenly distributed extrusion die, through which the wire and cable pass. The first flow channel 10 and the second flow channel 9 are arranged sequentially from left to right on the sidewall of the three-color stripe evenly distributed extrusion die. Both the first flow channel 10 and the second flow channel 9 are annular flow channels, and their opening directions are opposite. An injection molding machine connection port 8 is provided at the center of the first flow channel 10 for connecting to an extrusion device 7. An injection diversion port 11 is provided between the injection molding machine connection port 8 and the first flow channel 10, for injecting material into the first flow channel 10. The second flow channel 9 is evenly distributed with a first injection nozzle 15, a second injection nozzle 16, and a third injection nozzle 14 at 120° intervals. The first injection nozzle 15 and... The ratio of the inner opening diameter to the outer opening diameter of the second injection port 16 is 1:1.5, and the ratio of the inner opening diameter to the outer opening diameter of the third injection port 14 is 1:1.33. A third flow channel 13 is provided at the center of the first injection port 15 and the third injection port 14 to connect the first flow channel 10 and the second flow channel 9. In use, the third injection port 14 is located at the bottom of the wire / cable. The outer opening diameter of the first injection port 15, the second injection port 16, and the third injection port 14 is 6mm, the inner opening diameter of the first injection port 15 and the second injection port 16 is 4mm, and the inner opening diameter of the third injection port 14 is 4mm.A third flow channel 13 is provided at the center of the first injection port 15 and the third injection port 14 to connect the first flow channel 10 and the second flow channel 9. A third flow channel 13 is also provided at the center of the second injection port 16 and the third injection port 14 to connect the first flow channel 10 and the second flow channel 9. In use, the third injection port 14 is located at the bottom of the wire / cable. The first flow channel 10 and the second flow channel 9 are two closed rings with a flow width of 6mm and a depth of 3mm. The flow process is as follows: After the colored plastic strip is heated and melted, it enters the first flow channel 10 through the injection molding machine connection port. The first flow channel 10 splits into two, flowing to the left and right respectively. The left flow channel turns along the third flow channel 13 towards the second flow channel 9 at the middle position on both sides of the mold. The plastic material splits into two again, one side flowing to the first injection port 15 and the other side flowing to the third injection port 14. The right flow channel turns along the third flow channel 13 towards the second flow channel 9 at the middle position on both sides of the mold. The plastic material splits into two again, one side flowing to the second injection port 15 and the other side flowing to the third injection port 14. The flow from nozzle 16 to the third nozzle 14 is such that the flow distances of the first runner 10, second runner 9, and third runner 13 are equal on the mold sleeve. However, because the third nozzle 14 is located at the bottom, the injection pressure is such that the plastic flows through the first runner 10 and second runner 9 before converging at the third nozzle 14. Furthermore, the third nozzle 14 is located at the bottom and is furthest from the injection connection point. Therefore, the plastic flow pressure is slightly lower compared to the first nozzle 15 and second nozzle 16. Extensive testing has shown that... For example, if the inner opening of the third injection molding nozzle 14 has the same proportional diameter as the first injection molding nozzle 15 and the second injection molding nozzle 16, and the color strip below the surface of the sheath after injection molding is slightly narrower and shallower in embedment depth compared to the first injection molding nozzle 15 and the second injection molding nozzle 16, then the inner opening diameter of the third injection molding nozzle 14 should be larger than that of the first injection molding nozzle 15 and the second injection molding nozzle 16. After extensive testing, the ratio of the inner to outer openings of the third injection molding nozzle 14 was determined to be 1:1.33, and the final inner opening diameter of the third injection molding nozzle 14 was set to 4.5 mm.

[0027] The present invention provides a device for preventing deviation of three-color stripes evenly distributed in the two-color sheath of wires and cables. The device includes a wire feeding frame, a tension controller, a dual traction assembly, a first paralleling wheel, a single traction assembly, a second paralleling wheel, an extrusion device, a three-color stripe evenly distributed extrusion die and a controller. It can reduce wire feeding vibration, eliminate cable resonance, realize the control of three-color stripe even distribution and deviation prevention in the two-color sheath, and realize cable extrusion manufacturing.

[0028] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A device for preventing deviation of three-color stripes on a two-color sheath of electrical wires and cables, characterized in that, include: The extrusion equipment includes a wire feeding frame, a tension controller, a dual traction assembly, a first parallel reel, a single traction assembly, a second parallel reel, an extrusion device, a three-color stripe evenly distributed extrusion die, and a controller. The tension controller, dual traction assembly, first parallel reel, single traction assembly, second parallel reel, and extrusion device are sequentially arranged on the right side of the wire feeding frame. The three-color stripe evenly distributed extrusion die is located at the discharge port of the extrusion device. Wires and cables are wound around the wire feeding frame. One end of the wires and cables passes sequentially through the tension controller, dual traction assembly, first parallel reel, single traction assembly, and second parallel reel, and extends into the three-color stripe evenly distributed extrusion die for extrusion. The tension controller and extrusion device are electrically connected to the controller. The dual traction assembly is an upper and lower wheel type passive dual traction assembly. The wires and cables passing through the tension controller are arranged in a figure-eight shape in the groove of the traction wheel of the upper and lower wheel type passive dual traction assembly. The first parallel wheel and the second parallel wheel are grid-shaped parallel wheels, and the single traction assembly is a wheel-type single traction assembly. The wires and cables passing through the upper and lower wheel-type passive double traction assemblies pass through the first parallel wheel, the wheel-type single traction assembly and the second parallel wheel in sequence, and extend into the three-color stripe evenly distributed extrusion mold. The height of the wheel-type single traction assembly is 20cm higher than the three-color stripe evenly distributed extrusion mold. The three-color stripe evenly distributed extrusion die has a die bearing area at its center, through which the wires and cables pass. A first flow channel and a second flow channel are sequentially arranged from left to right within the sidewall of the three-color stripe evenly distributed extrusion die. Both the first and second flow channels are annular, and their opening directions are opposite. An injection molding machine connection port is located at the center of the first flow channel for connecting to extrusion equipment. An injection branch port is located between the injection molding machine connection port and the first flow channel, used for injection into the first flow channel. The second flow channel is spaced 120 mm apart. The cable is evenly divided into a first injection port, a second injection port, and a third injection port. The ratio of the inner diameter to the outer diameter of the first and second injection ports is 1:1.5, and the ratio of the inner diameter to the outer diameter of the third injection port is 1:1.

33. A third flow channel is provided at the center of the first and third injection ports to connect the first and second flow channels. In use, the third injection port is located at the bottom of the wire / cable.

2. The wire and cable two-color sheath three-color stripe even distribution anti-deviation device according to claim 1, characterized in that, A height sensing device is installed at the guide wheel of the tension controller. The tension cable drives the tension controller to move up and down through tension. The height sensing device is used to sense the height of the tension controller and is electrically connected to the controller.

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