Quick color changing device for wire and cable extruder and manufacturing method

Abstract

The present application belongs to the field of cable extrusion, especially a quick color changing device for wire and cable extruder and a manufacturing method. In view of the problem that the existing multi-machine split mode has scattered equipment layout, weak process coordination, and cannot efficiently adapt to the flexible production demand of small batch and multi-species orders, the following scheme is proposed, which includes a base, two housings are fixedly connected to one side of the base, the two housings are fixed by bolts, a first vertical pouring hole is arranged between the top and the bottom of the two housings, the two first vertical pouring holes are diagonally symmetrically arranged, an inner core is rotatably installed in the two housings, and a through hole is arranged at the center position of the inner core. The present application can quickly complete the wire color changing operation, simplify the color changing process, shorten the color changing waiting time, adapt to the continuous production and processing demand of the assembly line, effectively improve the problem of local overheating and static stratification of cooling water, improve the overall cooling uniformity of the wire, and stabilize the wire forming quality.

Description

Technical Field

[0001] This invention relates to the field of cable extrusion technology, and in particular to a rapid color-changing device for an extruder used for wires and cables and its manufacturing method. Background Technology

[0002] Currently, the extrusion process in the wire and cable manufacturing industry generally relies on two traditional processes to achieve color differentiation: one is multiple independent split extruders operating in parallel, each machine is equipped with a dedicated barrel, cannon barrel and screw, to extrude different colored rubber materials separately; the other is a single machine material changing mode, that is, color switching is completed in the same extruder by stopping the machine for cleaning and re-changing the material.

[0003] However, both of the above processes have insurmountable shortcomings: in the multi-machine split mode, the equipment layout is scattered and the process coordination is weak, making it unable to efficiently adapt to the flexible production needs of small-batch, multi-variety orders; in the single-machine material changing mode, frequent shutdowns are required to clean the flow channel and screw assembly, which not only causes a large amount of raw material loss, but also causes production interruptions due to repeated start-ups and shutdowns, significantly reducing labor productivity, while increasing raw material costs and delivery cycle pressure. In response to the above problems, this invention proposes a rapid color changing device and manufacturing method for extruders used in wires and cables. Summary of the Invention

[0004] This invention provides a rapid color-changing device and manufacturing method for an extruder used for wires and cables, which overcomes the shortcomings of the prior art.

[0005] This invention provides the following technical solution: A rapid color-changing device for an extruder used in wires and cables includes a base. Two outer shells are fixedly connected to one side of the base and secured to each other with bolts. Each of the two outer shells has a first vertical injection hole that penetrates between its top and bottom, and these two first vertical injection holes are diagonally symmetrical. An inner core is rotatably installed inside each of the two outer shells. A through hole is located at the center of each inner core. The top and bottom of each inner core have two vertical injection holes, and the two first vertical injection holes correspond to and communicate with the two second vertical injection holes. The second vertical injection hole is connected to the through hole. The inner core has two bent injection holes in the circumference. The bent injection holes are L-shaped and are connected to the through hole. The two bent injection holes are arranged diagonally symmetrically. The through hole has two forming parts. The forming part includes an extrusion sleeve. The extrusion sleeve is fixed in the through hole. A mold core is fixedly installed in the extrusion sleeve. There is a gap between the mold core and the extrusion sleeve. The extrusion sleeve has a first feed hole and a second feed hole in the circumference. The first feed hole normally corresponds to and is connected to the second vertical injection hole.

[0006] Furthermore, a rotating sleeve is fixedly connected to one end of the inner core, and the rotating sleeve rotates through the base.

[0007] Furthermore, a worm gear is fixedly installed on the circumference of the rotating sleeve, a protective shell is fixedly connected to one side of the base, a through worm is rotatably connected between the two sides of the protective shell, the worm meshes with the worm gear, a motor is fixedly connected to one side of the protective shell, and one end of the motor output shaft is fixed to the worm.

[0008] Furthermore, heaters and temperature sensors are fixedly installed inside the housing.

[0009] Furthermore, two extruder bodies are provided on one side of the base, and the discharge ends of the two extruder bodies are respectively fixedly connected to two first vertical injection holes.

[0010] Furthermore, it also includes a cooling tank, which is set on one side of the base. A gantry frame is fixedly installed on the top of the end of the cooling tank away from the base. A water injection pipe is fixedly installed on the top of the gantry frame to inject cooling water into the cooling tank. The formed wire passes through the cooling tank.

[0011] Furthermore, fixed frames are slidably installed on both sides of the gantry frame, and pressure rollers are rotatably installed between the fixed frames. Springs are fixedly installed between the top of the fixed frames and the gantry frame. A through-type rotating roller is rotatably connected between the two sides of the cooling tank. The rotating roller is located below the pressure roller. A fixed plate is fixedly connected to one end of the rotating roller. A drive shaft is eccentrically fixedly installed on one side of the fixed plate. A through-type rotating shaft is rotatably connected between the two sides of the cooling tank. A lever is fixedly connected to one side of the rotating shaft. The lever is located inside the cooling water tank. A vertical extension rod is fixedly connected to one end of the rotating shaft. A connecting rod is rotatably connected between the extension rod and the drive shaft.

[0012] This invention also proposes a method for manufacturing wires using a rapid color-changing device for an extruder, comprising the following steps: S1: The molten raw material enters the extrusion sleeve after passing through the first vertical injection hole, the second vertical injection hole and the first feed hole and flows along the gap. At the same time, the core wire passes through the mold core and is then wrapped. The two sleeves form two layers of wrapping for the core wire. S2: When color change is required, start the motor. The motor drives the worm to rotate. The worm drives the rotating sleeve to rotate through the worm wheel. The rotating sleeve drives the inner core to rotate. The inner core drives the second vertical feed hole to change position, so that the bent injection hole corresponds to the first vertical injection hole. The raw material enters the second feed hole after passing through the bent injection tube, and then enters the gap to wrap the core wire. Color change is convenient. S3: The extruded wire enters the cooling tank, and at the same time, the water injection pipe injects cooling water into the cooling tank to cool the wire. The wire is pulled between the rotating roller and the pressure roller. Under the action of friction, the rotating roller rotates and drives the fixed plate to rotate. The fixed plate drives the drive shaft to rotate. The drive shaft pushes and pulls the extension rod back and forth through the connecting rod, causing the rotating shaft to drive the dial plate to swing back and forth, thereby disturbing the cooling water in the cooling tank, improving the heat exchange effect, avoiding hot water from accumulating around the wire, and improving the cooling effect.

[0013] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention.

[0014] In this invention, the inner core, the second vertical injection tube and the bent injection hole are combined to drive the inner core to rotate and switch the feeding channel by relying on the transmission structure composed of motor, worm gear and worm. The raw material feeding path can be switched without stopping the machine and disassembling it, and the wire color change operation can be completed quickly, simplifying the color change process, shortening the color change waiting time, and adapting to the continuous production and processing needs of the production line. In this invention, by using the heater inside the shell in conjunction with the temperature sensor, the material channel can be controlled in real time to maintain the flow of molten raw materials, avoid the material cooling and solidification causing pipe blockage, ensure the continuity and stability of raw material transportation, and effectively improve the smoothness of the wire extrusion molding process. In this invention, by using the coordinated arrangement of rotating rollers, drive shaft, connecting rod and dial plate, the cooling water can be automatically driven to reciprocate and disturb using the power of wire conveying, without the need for additional drive equipment. This effectively improves the problems of local overheating and static stratification of cooling water, enhances the overall cooling uniformity of the wire, and stabilizes the wire forming quality. Attached Figure Description

[0015] Figure 1 This is a first-view three-dimensional structural schematic diagram of a rapid color-changing device for an extruder used in wires and cables provided in an embodiment of the present invention. Figure 2 This is a second-view three-dimensional structural schematic diagram of a rapid color-changing device for an extruder used in wires and cables provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the rotating sleeve installation structure of a rapid color-changing device for an extruder used in wires and cables, provided in an embodiment of the present invention. Figure 4 This is a partially exploded structural diagram of a rapid color-changing device for an extruder used in wires and cables, provided in an embodiment of the present invention. Figure 5 This is a schematic cross-sectional view of the inner core structure of a rapid color-changing device for an extruder used in wires and cables provided in an embodiment of the present invention. Figure 6This is a schematic cross-sectional view of the extrusion sleeve of a rapid color-changing device for an extruder used in wires and cables, provided in an embodiment of the present invention. Figure 7 This is a cross-sectional view of the cooling tank of a rapid color-changing device for an extruder used for wires and cables, provided in an embodiment of the present invention.

[0016] Figure label: 1. Base; 2. Extruder body; 3. Cooling tank; 4. Protective shell; 5. Motor; 6. Outer shell; 7. Rotating sleeve; 8. Worm gear; 9. Worm; 10. First vertical injection hole; 11. Heater; 12. Temperature sensor; 13. Inner core; 17. Second vertical injection hole; 18. Bending injection hole; 19. Through hole; 20. Extrusion sleeve; 21. First feed hole; 22. Second feed hole; 23. Die core; 24. Gap; 25. Gantry frame; 26. Rotating roller; 27. Fixed plate; 28. Drive shaft; 29. ​​Rotating shaft; 30. Pulley; 31. Connecting rod; 32. Extension rod; 33. Water injection pipe; 34. Fixed frame; 35. Pressure roller; 36. Spring. Detailed Implementation

[0017] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0018] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0019] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized. Example 1

[0020] Reference Figures 1-7 A rapid color-changing device for an extruder used in wires and cables includes a base 1. Two outer shells 6 are bolted to one side of the base 1. The two outer shells 6 are fastened together by multiple sets of bolts. This bolted assembly method ensures the tightness and stability of the connection between the two outer shells 6, while also facilitating subsequent disassembly, inspection, and maintenance of the internal structure. A first vertical injection hole 10 is provided between the top and bottom of each of the two outer shells 6. The two first vertical injection holes 10 are arranged diagonally symmetrically. Two extruder bodies 2 are mounted on one side of the base 1. The discharge ends of the two extruder bodies 2 are respectively fixedly connected to the two first vertical injection holes 10. Different colored raw materials molten in the extruder bodies 2 can be respectively conveyed into the first vertical injection holes 10 for subsequent wire extrusion.

[0021] The inner core 13 is rotatably mounted inside both outer shells 6. A through-hole 19 is located at the center of the inner core 13, serving as a common channel for the core wire to pass through and for material extrusion. Vertically arranged second vertical injection holes 17 are fixedly installed at the top and bottom of the inner core 13. These two second vertical injection holes 17 correspond to the positions of the two first vertical injection holes 10 and are internally interconnected. Under normal processing conditions, the molten raw material output from the extruder body 2 can be continuously conveyed through the first vertical injection holes 10 and the second vertical injection holes 17 sequentially. Two bent injection holes 18 are fixedly installed on the circumferential sidewall of the inner core 13. These bent injection holes 18 are L-shaped and arranged diagonally symmetrically. The internal channels of all bent injection holes 18 are connected to the through-hole 19 at the center of the inner core 13. Rotating the inner core 13 allows for switching the feeding channel and enabling color changing operations.

[0022] Two forming parts are fixedly assembled inside the through hole 19. The forming part includes an extrusion sleeve 20. The extrusion sleeve 20 is fixedly embedded inside the through hole 19 and its position remains fixed after assembly. A mold core 23 is fixedly installed at the center of the inside of the extrusion sleeve 20. An annular gap 24 is reserved between the mold core 23 and the inner wall of the extrusion sleeve 20. This gap 24 is a flow forming channel for the molten raw material. The circumferential sidewalls of the extrusion sleeve 20 are respectively provided with a first feed hole 21 and a second feed hole 22. Under normal processing conditions, the position of the first feed hole 21 corresponds to and is connected to the second vertical injection hole 17. After the molten material passes through the first vertical injection hole 10 and the second vertical injection hole 17, it enters the interior of the extrusion sleeve 20 through the first feed hole 21. Then it flows at a constant speed along the gap 24 between the die core 23 and the extrusion sleeve 20. At the same time, the equipment pulls the core wire through the central channel of the die core 23, and the flowing molten material can be evenly wrapped around the outside of the core wire. The double-layer structure of the two extrusion sleeves 20 can form a double-layer wrapping structure for the core wire.

[0023] A rotating sleeve 7 is fixedly connected to one end of the inner core 13. The cylindrical structure of the rotating sleeve 7 rotatably penetrates the base 1, allowing the rotating sleeve 7 to rotate freely relative to the base 1. This, in turn, drives the inner core 13 to rotate synchronously inside the outer shell 6, completing the switching and adjustment of the feeding channel. A worm gear 8 is fixedly installed on the outer circumference of the rotating sleeve 7. The worm gear 8 and the rotating sleeve 7 are fixedly integrated and can rotate synchronously. A protective shell 4 is fixedly connected to the side of the base 1 facing the outer shell 6. The protective shell 4 covers the outside of the worm gear 8, providing protection and dust prevention for the transmission structure, preventing processing dust and debris from entering the transmission structure and affecting the operating accuracy. A through-type worm 9 is rotatably connected between the two side plates of the protective shell 4. The worm 9 meshes with the worm gear 8 for transmission. A motor 5 is fixedly installed on the outer wall of the protective shell 4. The output shaft end of the motor 5 is fixedly connected to the shaft end of the worm 9. When the motor 5 is running, it can drive the worm 9 to rotate continuously, thereby driving the worm gear 8 and the rotating sleeve 7 to rotate at a low speed and stably.

[0024] When it is necessary to change the color of the wire, start the motor 5. The output shaft of the motor 5 drives the worm 9 to rotate synchronously. The worm 9 meshes with and drives the worm wheel 8 to rotate. The worm wheel 8 drives the fixedly connected rotating sleeve 7 to rotate. The rotating sleeve 7 further drives the inner core 13 to rotate circumferentially inside the outer shell 6. During the rotation of the inner core 13, the corresponding position of the second vertical injection hole 17 will change, so that the originally misaligned bent injection hole 18 will rotate to a position aligned and connected with the first vertical injection hole 10. At this time, the molten raw material output from the extruder body 2 will enter the inside of the bent injection hole 18 through the first vertical injection hole 10, and then be introduced into the second feed hole 22 through the bent injection hole 18, and finally enter the gap 24 inside the extrusion sleeve 20, continuously wrapping the core wire. The entire channel switching process does not require stopping the machine to disassemble the equipment, and can quickly complete the internal and external color change operation of wire processing, simplifying the color change process.

[0025] Heaters 11 and temperature sensors 12 are fixedly installed in the internal cavities of both outer shells 6. Heaters 11 can heat the material channel inside the outer shell 6 at a constant temperature to maintain the flow state of the molten raw material inside and prevent the raw material from cooling down, solidifying and blocking the pipe. Temperature sensors 12 can collect the temperature data inside the outer shell 6 in real time to realize real-time monitoring of the processing temperature, which is convenient for matching the temperature range required for the melting of raw materials and ensuring the stability of raw material conveying and extrusion operations. Example 2

[0026] Reference Figures 1-7 Based on Example 1, an improved rapid color-changing device for an extruder used for wires and cables is provided. This device also includes a cooling tank 3, which is located on the outer side of the base 1. After the wire is extruded and formed by the color-changing mechanism, it can directly enter the cooling tank 3 to complete the cooling and shaping process. A gantry frame 25 is fixedly installed on the top of the end of the cooling tank 3 away from the base 1. A water injection pipe 33 is fixedly installed on the top frame of the gantry frame 25. An external cooling water supply device can continuously inject cooling water into the cooling tank 3 through the water injection pipe 33. The formed wire passes through the cooling water in the cooling tank 3. Through heat exchange between the cooling water and the wire, the high temperature remaining during the wire forming process is removed, completing the cooling and shaping operation of the wire.

[0027] Vertically arranged fixed frames 34 are slidably mounted on both sides of the gantry frame 25. Springs 36 are fixedly installed between the top of each fixed frame 34 and the frame body of the gantry frame 25. The springs 36 exert an elastic downward pressure on the fixed frames 34. A pressure roller 35 is rotatably mounted between the lower ends of the two fixed frames 34. The pressure roller 35 can slide slightly up and down with the fixed frames 34 to accommodate the conveying of wires of different specifications. A through-type rotating roller 26 is rotatably connected between the two sides of the cooling tank 3. The rotating roller 26 is horizontally arranged directly below the pressure roller 35. The wire passes through the gap between the pressure roller 35 and the rotating roller 26. Under the action of the springs 36, the pressure roller 35 adheres to the surface of the wire, increasing the friction between the wire and the rotating roller 26, ensuring that the rotating roller 26 rotates synchronously during wire conveying.

[0028] One end of the rotating roller 26 extends out of the cooling tank 3 and is fixedly connected to a fixed disk 27. A drive shaft 28 is fixedly mounted eccentrically on the outer surface of the fixed disk 27. The drive shaft 28 does not coincide with the center of the fixed disk 27 and moves eccentrically in a circular motion with the fixed disk 27. A through-type rotating shaft 29 is also rotatably connected between the two sides of the cooling tank 3. A lever 30 is fixedly mounted on the outer side of the shaft 29. The lever 30 is completely arranged inside the cooling water of the cooling tank 3 and can swing synchronously with the rotating shaft 29. A vertically arranged extension rod 32 is fixedly connected to one end of the rotating shaft 29 extending out of the cooling tank 3. A connecting rod 31 is rotatably connected between the top end of the extension rod 32 and the drive shaft 28 on the fixed disk 27.

[0029] During the continuous traction and conveying of the wire, friction drives the rotating roller 26 to rotate continuously. The rotating roller 26 drives the fixed plate 27 at the end to rotate synchronously. The drive shaft 28, which is eccentrically mounted on the fixed plate 27, then performs a circular motion. The drive shaft 28 continuously pushes and pulls the extension rod 32 through the connecting rod 31, causing the extension rod 32 to drive the rotating shaft 29 to perform a reciprocating rotational motion in both directions. The rotating shaft 29 further drives the swivel plate 30 in the groove to continuously swing back and forth. The swinging swivel plate 30 can continuously disturb the cooling water inside the cooling groove 3, breaking the static stratification of the cooling water, avoiding the continuous heat absorption and temperature rise of the cooling water around the wire, and preventing the local water temperature from becoming too high. It accelerates the overall heat exchange speed of the cooling water, allowing the heat on the surface of the wire to dissipate quickly, improving the uniformity and efficiency of the wire cooling and shaping, and ensuring the quality stability of the wire after forming.

[0030] It also includes a controller (not shown in the figure), which is electrically connected to the motor 5, the heater 11 and the temperature sensor 12 respectively.

[0031] This invention also proposes a method for manufacturing wires using a rapid color-changing device for an extruder, comprising the following steps: S1: The melted raw material enters the extrusion sleeve 20 after passing through the first vertical injection hole 10, the second vertical injection hole 17 and the first feed hole 21 and flows along the gap 24. At the same time, the core wire passes through the mold core 23 and is then wrapped. The two sleeves 20 form two layers of wrapping for the core wire. S2: When a color change is required, start motor 5. Motor 5 drives worm 9 to rotate. Worm 9 drives rotating sleeve 7 to rotate through worm wheel 8. Rotating sleeve 7 drives inner core 13 to rotate. Inner core 13 drives second vertical feed hole 17 to change position, so that bent injection hole 18 corresponds to first vertical injection hole 10. Raw material enters second feed hole 22 after passing through bent injection tube 18, and then enters gap 24 to wrap core wire, making color change convenient. S3: The extruded wire enters the cooling tank 3, and at the same time, the water injection pipe 33 injects cooling water into the cooling tank 3 to cool the wire. The wire is pulled between the rotating roller 26 and the pressure roller 35. Under the action of friction, the rotating roller 26 rotates and drives the fixed plate 27 to rotate. The fixed plate 27 drives the drive shaft 28 to rotate. The drive shaft 28 pushes and pulls the extension rod 32 back and forth through the connecting rod 31, causing the rotating shaft 29 to drive the dial plate 30 to swing back and forth, thereby disturbing the cooling water in the cooling tank 3, improving the heat exchange effect, avoiding hot water from accumulating around the wire, and improving the cooling effect.

[0032] However, as is well known to those skilled in the art, the working principles and wiring methods of the extruder body 2, motor 5, temperature sensor 12 and heater 11 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0033] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rapid color-changing device for an extruder used in wires and cables, characterized in that, The system includes a base (1), with two outer shells (6) fixedly connected to one side of the base (1). The two outer shells (6) are fixed together by bolts. A first vertical injection hole (10) is provided between the top and bottom of each of the two outer shells (6). The two first vertical injection holes (10) are arranged diagonally symmetrically. An inner core (13) is rotatably installed inside each of the two outer shells (6). A through hole (19) is provided at the center of the inner core (13). A second vertical injection hole (17) is provided at the top and bottom of the inner core (13). The two first vertical injection holes (10) correspond to and communicate with the two second vertical injection holes (17). The second vertical injection holes (17) are all connected to the through hole (19). The inner core (13) is provided with two bent injection holes (18) in the circumferential direction. The bent injection holes (18) are L-shaped and are connected to the through hole (19). The two bent injection holes (18) are arranged diagonally symmetrically. The through hole (19) is provided with two forming parts. The forming part includes an extrusion sleeve (20). The extrusion sleeve (20) is fixed in the through hole (19). A mold core (23) is fixedly installed in the extrusion sleeve (20). A gap (24) is provided between the mold core (23) and the extrusion sleeve (20). The extrusion sleeve (20) is provided with a first feed hole (21) and a second feed hole (22) in the circumferential direction. The first feed hole (21) is normally connected to the second vertical injection hole (17).

2. The rapid color-changing device for an extruder used in wires and cables according to claim 1, characterized in that, One end of the inner core (13) is fixedly connected to a rotating sleeve (7), which rotates through the base (1).

3. The rapid color-changing device for an extruder used in wires and cables according to claim 2, characterized in that, A worm gear (8) is fixedly installed on the circumference of the rotating sleeve (7). A protective shell (4) is fixedly connected to one side of the base (1). A through worm (9) is rotatably connected between the two sides of the protective shell (4). The worm (9) meshes with the worm gear (8). A motor (5) is fixedly connected to one side of the protective shell (4). One end of the output shaft of the motor (5) is fixed to the worm (9).

4. The rapid color-changing device for an extruder used in wires and cables according to claim 1, characterized in that, Heaters (11) and temperature sensors (12) are fixedly installed inside the outer casing (6).

5. A rapid color-changing device for an extruder used in wires and cables according to claim 1, characterized in that, Two extruder bodies (2) are provided on one side of the base (1), and the discharge ends of the two extruder bodies (2) are respectively fixedly connected to two first vertical injection holes (10).

6. The rapid color-changing device for an extruder used in wires and cables according to claim 1, characterized in that, It also includes a cooling tank (3), which is located on one side of the base (1). A gantry (25) is fixedly installed on the top of the end of the cooling tank (3) away from the base (1). A water injection pipe (33) is fixedly installed on the top of the gantry (25) for injecting cooling water into the cooling tank (3). The formed wire passes through the cooling tank.

7. A rapid color-changing device for an extruder used in wires and cables according to claim 6, characterized in that, Fixed frames (34) are slidably installed on both sides of the gantry (25). Pressure rollers (35) are rotatably installed between the fixed frames (34). Springs (36) are fixedly installed between the top of the fixed frames (34) and the gantry (25). A through rotating roller (26) is rotatably connected between the two sides of the cooling tank (3). The rotating roller (26) is located below the pressure roller (35). A fixed plate (27) is fixedly connected to one end of the rotating roller (26). A drive shaft (28) is eccentrically fixedly installed on one side of the fixed plate (27). A through rotating shaft (29) is rotatably connected between the two sides of the cooling tank (3). A lever (30) is fixedly connected to one side of the rotating shaft (29). The lever (30) is located inside the cooling water tank (3). A vertical extension rod (32) is fixedly connected to one end of the rotating shaft (29). A connecting rod (31) is rotatably connected between the extension rod (32) and the drive shaft (28).

8. A method for manufacturing wires using a rapid color-changing extruder according to any one of claims 1-7, characterized in that, Includes the following steps: S1: The melted raw material enters the extrusion sleeve (20) after passing through the first vertical injection hole (10), the second vertical injection hole (17) and the first feed hole (21) and flows along the gap (24). At the same time, the core wire passes through the mold core (23) and then wraps the core wire. The setting of the two sleeves (20) forms two layers of wrapping for the core wire. S2: When color change is required, start the motor (5). The motor (5) drives the worm (9) to rotate. The worm (9) drives the rotating sleeve (7) to rotate through the worm wheel (8). The rotating sleeve (7) drives the inner core (13) to rotate. The inner core (13) drives the second vertical feed hole (17) to change position, so that the bent injection hole (18) corresponds to the first vertical injection hole (10). The raw material enters the second feed hole (22) after passing through the bent injection tube (18), and then enters the gap (24) to wrap the core wire. Color change is convenient. S3: The extruded wire enters the cooling tank (3), and at the same time, the water injection pipe (33) injects cooling water into the cooling tank (3) to cool the wire. The wire is pulled between the rotating roller (26) and the pressure roller (35). Under the action of friction, the rotating roller (26) rotates and drives the fixed disk (27) to rotate. The fixed disk (27) drives the drive shaft (28) to rotate. The drive shaft (28) pushes and pulls the extension rod (32) back and forth through the connecting rod (31) to make the rotating shaft (29) drive the dial plate (30) to swing back and forth, thereby disturbing the cooling water in the cooling tank (3), improving the heat exchange effect, avoiding hot water from accumulating around the wire, and improving the cooling effect.

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