Extrusion equipment for flame-retardant low-voltage cable test

Abstract

The utility model relates to the technical field of cable equipment, in particular to extrusion equipment for flame-retardant low-voltage cable test, which comprises an extruder and a circulating workbench positioned at a discharge end of the extruder, a die head is arranged on the extruder, a part of the die head extends to the circulating workbench, a cable core is movably arranged on the circulating workbench, and the cable core is connected with the extruder. The cable core penetrates through the die head, the cable core is connected end to end and arranged in the die head in a sliding mode, the circulating workbench is further provided with a cooling device and a stripping device, and the cable core penetrates through the cooling device and the stripping device. An observation area and a comparison area are sequentially arranged on the circulating workbench close to the cooling device, and the cable core penetrates through the observation area and the comparison area; according to the utility model, the test result can be visually seen, the accuracy and stability of the test can be ensured, the test times can be furthest increased by the cyclically repeated cable core, and the test data can be ensured to be more accurate.

Description

Technical Field

[0001] This utility model relates to the field of cable equipment technology, and in particular to an extrusion device for testing flame-retardant low-voltage cables. Background Technology

[0002] Extruders are widely used in the plastics processing industry. They heat and melt plastic granules or powders, then extrude them into continuous products with specific cross-sectional shapes. These products can include plastic pipes, profiles, and cable sheaths. Because different masterbatch granules have different plasticizing temperatures, and because the plasticizing temperature is affected by many factors such as material quality, composition, and processing conditions, the plasticizing effect of the plastic granules and the final product surface quality can be affected. Therefore, to ensure that the cable sheath surface quality meets standards, manufacturers need to conduct repeated experiments according to the designed process before production. This involves producing a section of cable with predetermined parameters, then changing the parameters and producing another section, comparing the results to select the most suitable production parameter range. However, current cable production parameter experiments typically involve producing a section, stopping the machine, adjusting the parameters, and then starting production again, comparing the quality of the two production runs. This method is not only inefficient, but stopping and restarting the machine can also cause changes in some processing conditions, resulting in low controllability and affecting the test results.

[0003] To address the aforementioned technical problems, Chinese patent CN214982715U discloses an experimental high-voltage XLPE cable flexible joint insulation layer interface simulation device, comprising an extruder, a heating solenoid, and an injection mold. The injection mold is disposed inside the heating solenoid. The extruder injects raw material into the injection mold. The injection mold includes a head, an vent pipe, an vent outlet, a first injection channel, a second injection channel, an inclined body, and a cylinder. The head is installed at the open end of the cylinder, the inclined body is disposed inside the cylinder, the vent pipe and the first injection channel are located directly above the cylinder, and the vent outlet and the second injection channel are located directly below the cylinder. The cylinder is placed horizontally on a support. This patent can independently produce the samples studied in the experiment and investigate the influence of variables such as extrusion rate, extrusion temperature, and reaction cone inclination on the interfacial electrical properties, thereby correctly guiding the design of the molding die and the selection of extrusion parameters, improving the quality of the joint products produced in actual production, and increasing production efficiency. However, during the experimental comparison process, repeated shutdowns are still required, resulting in low efficiency and low controllability.

[0004] Therefore, it is necessary for those skilled in the art to provide an extrusion device for testing flame-retardant low-voltage cables, ensuring the continuity of the experiment, reducing downtime, and improving the accuracy of parameters when performing extrusion experiments on cable sheaths. Utility Model Content

[0005] The purpose of this utility model is to provide an extrusion device for testing flame-retardant low-voltage cables, in order to solve the technical problem that in the prior art, cable production parameter tests usually involve stopping the machine after producing a certain amount of cable, adjusting the parameters, and then starting production again, which leads to low efficiency, low controllability, and affects the test results.

[0006] The technical solution adopted by this utility model to solve its technical problem is: an extrusion device for testing flame-retardant low-voltage cables, including an extruder and a circulating worktable located at the discharge end of the extruder. The extruder is provided with a die head, the die head extending to the circulating worktable. A cable core is movably provided on the circulating worktable. The cable core passes through the die head and is connected end to end and slidably disposed inside the die head. The circulating worktable is also provided with a cooling device and a stripping device, and the cable core passes through the cooling device and the stripping device. An observation area and a comparison area are sequentially provided on the circulating worktable near the cooling device, and the cable core passes through the observation area and the comparison area.

[0007] Furthermore, the circulating worktable has a square plate structure, the cable core is arranged in a ring on the circulating worktable, and the cooling device is located on one side of the die head outlet.

[0008] Furthermore, the stripping device includes a frame and a cutting blade rotatably disposed within the frame, wherein multiple cutting blades are provided and symmetrically arranged along the axis of the cable core.

[0009] Furthermore, the cutting direction of the cutting blade is consistent with the extension direction of the cable core.

[0010] Furthermore, the diameter of the cutting blade is set from small to large along the moving direction of the cable core.

[0011] Furthermore, the circulating worktable is provided with multiple transmission wheels arranged in a ring on the circulating worktable.

[0012] Furthermore, the drive wheels are symmetrically arranged between each pair of drive wheels, and the cable core is threaded between the two symmetrical drive wheels.

[0013] Furthermore, the cooling device includes a housing and an inlet and an outlet located on the housing. Cooling water flows through the housing, and the cable core passes through the cooling water. The inlet and outlet are respectively connected to a water tank.

[0014] The beneficial effects of this invention are as follows: This invention adds a circulating worktable to the discharge end of the extruder. The circulating worktable is equipped with an extrusion zone, an observation zone, a comparison zone, and a stripping zone. This facilitates convenient experimental operations for cable sheath forming. The die in the extrusion zone wraps the cable core sheath onto the cable. The cable core then reaches the observation zone to observe the forming effect of the cable core sheath. Next, the cable core reaches the comparison zone to check the flatness and presence of defects in the cable core sheath. Finally, the cable core enters the stripping zone to remove the cable core sheath, and then re-enters the die for the next sheath wrapping. This invention allows for direct observation of the test results, ensuring the accuracy and stability of the experiment. Simultaneously, the repeated use of the cable core maximizes the number of tests, ensuring more accurate experimental data. Attached Figure Description

[0015] Figure 1 This is a perspective view of the extrusion equipment for testing flame-retardant low-voltage cables according to this utility model.

[0016] Figure 2 This is a top view of the extrusion equipment for testing flame-retardant low-voltage cables according to this utility model.

[0017] Figure 3 yes Figure 2 Sectional view along the middle AA.

[0018] The components in the attached diagram are labeled as follows: 10, extruder; 11, die head; 20, circulating worktable; 21, cooling device; 22, peeling device; 23, observation area; 24, comparison area; 25, cutting blade; 26, drive wheel; 27, frame; 30, cable core. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0020] Please see Figure 1 , Figure 2 This utility model provides an extrusion device for testing flame-retardant low-voltage cables, including an extruder 10 and a circulating worktable 20 located at the discharge end of the extruder 10. The extruder 10 is provided with a die 11, which extends partially onto the circulating worktable 20. A cable core 30 is movably mounted on the circulating worktable 20, passing through the die 11. The cable core 30 is connected end-to-end and slidably disposed within the die 11. The circulating worktable 20 is also provided with a cooling device 21 and a stripping device 22, through which the cable core 30 passes. The cooling device 21 is used to cool the outer sheath of the cable core 30, and the stripping device 22 is used to remove the outer sheath of the cable core 30.

[0021] During operation, the material is added to the extruder 10, plasticized and extruded, and finally filled into the die head 11. The cable core 30 passes through the die head 11 end to end, thereby covering the outer sheath of the cable core 30. The cooling device 21 is used to quickly cool the outer sheath of the cable core 30. After the outer sheath is cooled, it is moved a certain distance so that the operator can observe the forming effect of the outer sheath. Then, the peeling device 22 is used to remove the outer sheath from the cable core 30, thereby realizing recycling.

[0022] In this embodiment, the extruder 10 is a commonly available screw extruder. During use, the parameters are manually adjusted, facilitating experiments with different materials. Compared to existing cable production parameter experiments that involve stopping production after a certain period, adjusting parameters, and restarting production, then comparing the quality of the two batches, this invention not only eliminates the need for downtime, ensuring continuous processing, but also simplifies operation. Some experimental parameters do not require modification and can be used directly, thus offering strong controllability, significantly reducing experimental errors, and ensuring the accuracy and stability of the experiments.

[0023] Furthermore, the circulating worktable 20 has a square plate structure, and the cable core 30 is arranged in a ring on the circulating worktable 20. The cooling device 21 is located on one side of the discharge port of the die head 11. After the cable core 30 is removed from the die head 11, it enters the cooling device 21, thereby achieving rapid cooling of the outer sheath of the cable core 30 and ensuring that the outer sheath of the cable core 30 can be formed quickly.

[0024] In this embodiment, the cooling device 21 is a water circulation cooling device, that is, the cooling device 21 includes a housing and an inlet and an outlet located on the housing. Cooling water is circulated inside the housing, and the cable core 30 passes through the cooling water to achieve cooling. The inlet and outlet are respectively connected to water tanks to ensure the circulation of cooling water inside the housing and to ensure the cooling effect.

[0025] The circulating workbench 20 is provided with an observation area 23 and a comparison area 24 near the cooling device 21. After passing through the cooling device 21, the cable core 30 enters the observation area 23 and the comparison area 24, so as to realize the observation and comparison of the outer sheath of the cable core 30, which makes it easier for operators to confirm the quality of the outer sheath of the cable core 30.

[0026] In this embodiment, the observation area 23 is provided with a glass cover to protect the cable core 30 that has just finished cooling, to prevent the outer sheath of the cable core 30 from deforming due to excessive temperature difference. At the same time, the glass cover can reduce the volatilization of odors and ensure the safety of the operators.

[0027] This invention adds a circulating worktable 20 to the discharge end of the extruder 10. The circulating worktable 20 is equipped with an extrusion zone, an observation zone, a comparison zone, and a stripping zone. This facilitates convenient experimental operations for cable sheath forming. The die 11 in the extrusion zone wraps the cable core 30 with its outer sheath. The cable core 30 then reaches the observation zone to observe the forming effect of the outer sheath. Next, the cable core 30 reaches the comparison zone to check the smoothness and presence of defects in the outer sheath. Finally, the cable core 30 enters the stripping zone to remove its outer sheath. The cable core 30 then re-enters the die 11 for the next sheath wrapping. This invention allows for direct observation of experimental results, ensuring the accuracy and stability of the experiment. Furthermore, the repeated use of the cable core 30 maximizes the number of tests, ensuring more accurate experimental data.

[0028] Further, please refer to Figure 3 The stripping device 22 includes a frame 27 and a cutting blade 25 rotatably disposed within the frame 27. The cutting blade 25 is provided in multiples and symmetrically arranged along the axis of the cable core 30. The cutting direction of the cutting blade 25 is consistent with the extension direction of the cable core 30.

[0029] In this embodiment, the diameter of the cutting blade 25 is set from small to large according to the moving direction of the cable core 30, so as to sequentially cut the outer sheath of the cable core 30 from shallow to deep. A drive motor (not shown in the figure) is provided on the frame 27, and the cutting blade 25 is fixedly connected to the output shaft of the drive motor to drive the cutting blade 25 and ensure the stability of the cutting. This utility model uses multiple cutting blades 25 to achieve rapid and complete removal of the cable core 30, facilitating subsequent re-wrapping of the cable core 30 with its outer sheath. This ensures the continuity and efficiency of the experiment, reduces experimental errors caused by repeated shutdowns, and improves experimental accuracy.

[0030] Furthermore, the circulating worktable 20 is provided with multiple transmission wheels 26 arranged in a ring on the circulating worktable 20; each pair of transmission wheels 26 is symmetrically arranged, and the cable core 30 passes between the two symmetrical transmission wheels 26. The transmission wheels 26 drive the cable core 30 to move, thereby ensuring that the cable core 30 moves in a ring on the circulating worktable 20.

[0031] The specific operation method of this utility model is as follows: The cable core 30 is installed on the circulating worktable 20 with the ends connected. The transmission wheel 26 drives the cable core 30 to move on the circulating worktable 20. The mold head 11 is used to wrap the outer sheath on the cable core 30. The cooling device 21 is used to cool the cable core 30 after wrapping the outer sheath. Then the cable core 30 passes through the observation area 23 and the comparison area 24 in sequence. The quality of the outer sheath of the cable core 30 is recorded. Finally, the stripping device 22 is used to remove the outer sheath of the cable core 30. The cable core 30 is moved back into the mold head 11 to complete the cyclic test.

[0032] This invention adds a circulating worktable 20 to the discharge end of the extruder 10. The circulating worktable 20 is equipped with an extrusion zone, an observation zone, a comparison zone, and a stripping zone. This facilitates convenient experimental operations for cable sheath forming. The die 11 in the extrusion zone wraps the cable core 30 with its outer sheath. The cable core 30 then reaches the observation zone to observe the forming effect of the outer sheath. Next, the cable core 30 reaches the comparison zone to check the smoothness and presence of defects in the outer sheath. Finally, the cable core 30 enters the stripping zone to remove its outer sheath. The cable core 30 then re-enters the die 11 for the next sheath wrapping. This invention allows for direct observation of experimental results, ensuring the accuracy and stability of the experiment. Furthermore, the repeated use of the cable core 30 maximizes the number of tests, ensuring more accurate experimental data.

[0033] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. An extrusion device for flame retardant low-voltage cable testing, comprising an extruder (10) and a circulation workbench (20) located at the discharge end of the extruder (10), characterized in that: The extruder (10) is provided with a die head (11), and a portion of the die head (11) extends onto a circulation workbench (20). A cable core (30) is movably provided on the circulation workbench (20), and the cable core (30) passes through the die head (11). The cable core (30) is connected end to end and is slidably arranged in the die head (11). The circulation workbench (20) is also provided with a cooling device (21) and a peeling device (22), and the cable core (30) passes through the cooling device (21) and the peeling device (22). An observation area (23) and a comparison area (24) are sequentially provided on the circulation workbench (20) near the cooling device (21), and the cable core (30) passes through the observation area (23) and the comparison area (24).

2. The flame-retardant low-voltage cable test extrusion equipment according to claim 1, characterized in that: The circulation workbench (20) is in a square plate-shaped structure, the cable core (30) is arranged in a ring shape on the circulation workbench (20), and the cooling device (21) is arranged on one side of the material outlet of the die head (11).

3. The flame-retardant low-voltage cable test extrusion equipment according to claim 1, characterized in that: The stripping device (22) comprises a frame (27) and a cutting knife (25) rotatably arranged in the frame (27); a plurality of the cutting knives (25) are provided and symmetrically arranged along the axis of the cable core (30).

4. The flame-retardant low-voltage cable test extrusion equipment according to claim 3, characterized in that: The cutting direction of the cutting knife (25) is consistent with the extending direction of the cable core (30).

5. The flame-retardant low-voltage cable test extrusion equipment according to claim 4, characterized in that: The diameters of the cutting blades (25) are arranged in order from small to large along the moving direction of the cable core (30).

6. The flame-retardant low-voltage cable test extrusion equipment according to claim 1, characterized in that: The circulation workbench (20) is provided with a transmission wheel (26), and a plurality of transmission wheels (26) are provided. The plurality of transmission wheels (26) are arranged in a ring shape on the circulation workbench (20).

7. The flame-retardant low-voltage cable test extrusion equipment according to claim 6, characterized in that: Every two transmission wheels (26) are symmetrically arranged, and the cable core (30) is passed through the two symmetrical transmission wheels (26).

8. The flame-retardant low-voltage cable test extrusion equipment according to claim 1, characterized in that: The cooling device (21) comprises a shell and a water inlet and a water outlet located on the shell, cooling water is provided in the shell, the cable core (30) passes through the cooling water, and the water inlet and the water outlet are respectively connected to an external water tank.

Images