An extruder for producing a wire cable

Abstract

This utility model relates to the field of extruder technology, specifically disclosing an extruder for producing cables, comprising: a worktable, an extruder housing fixedly connected to the upper surface of the worktable, a feed hopper fixedly connected to the upper surface of the extruder housing, a drive assembly disposed on the outer surface of the extruder housing, and a screw fixedly connected to the output end of the drive assembly. Through a planetary transmission structure consisting of a protective box, a drive motor, a central gear, three sets of transmission gears, a limiting gear ring plate, and a linkage rod within the drive assembly, the drive motor drives the central gear to rotate, causing the three sets of transmission gears to rotate planetarily under the constraint of the limiting gear ring plate, and then drives the screw through the linkage rod. This structure can evenly distribute the driving force, reducing the contact pressure of the screw when conveying raw materials. It is suitable for the rapid and uniform conveying of low-viscosity raw materials, and can also handle high-viscosity raw materials to prevent screw jamming and deformation, meeting the feeding requirements of various viscosities and improving the equipment's adaptability to different cable raw materials.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, specifically to an extruder for producing cables. Background Technology

[0002] Cables are a general term for items such as optical cables and electrical cables. Cables have many uses, mainly for control installation, connecting equipment, and transmitting electricity, and are a common and indispensable item in daily life.

[0003] Most existing cable extruders use a single gear or belt drive to rotate the screw during the extrusion process. This type of drive concentrates the driving force at a single contact point, which can lead to insufficient adaptability when conveying cable raw materials of varying viscosities. When conveying low-viscosity materials, it can affect the uniformity of the cable insulation thickness; while when conveying high-viscosity materials, it can easily cause screw jamming and deformation, and may also accelerate wear on transmission components, shortening the service life of core components. It is difficult to simultaneously meet the stable conveying requirements of raw materials with different viscosities. Therefore, we propose an extruder for cable production. Utility Model Content

[0004] The purpose of this invention is to provide an extruder for producing cables, addressing the problem mentioned in the background art where most existing cable extruders use a single gear or belt drive to rotate the screw during the extrusion and conveying process. This type of transmission structure concentrates the driving force at a single contact point, leading to insufficient adaptability when conveying cable raw materials of different viscosities. When conveying low-viscosity raw materials, it affects the uniformity of the cable insulation layer thickness; while when conveying high-viscosity raw materials, it not only easily causes screw jamming and deformation but may also exacerbate wear on transmission components, shorten the service life of core components, and make it difficult to simultaneously meet the stable conveying requirements of raw materials with different viscosities.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an extruder for producing cables, comprising: a worktable, an extruder housing fixedly connected to the upper surface of the worktable, a feed hopper fixedly connected to the upper surface of the extruder housing, a drive assembly provided on the outer surface of the extruder housing, a screw fixedly connected to the output end of the drive assembly, and multiple sets of screws provided at the output end of the drive assembly, the drive assembly driving the multiple sets of screws to rotate synchronously and adjusting the contact pressure between the screws and the raw material inside the extruder housing.

[0006] The feed hopper is fixedly connected to the upper end of the extruder housing near the drive assembly, and the feed hopper is connected through the interior of the extruder housing.

[0007] The drive assembly includes a protective box, a drive motor is fixedly connected inside the protective box, a fixing plate is fixedly connected to the outer surface of the protective box, and a limit toothed ring plate is fixedly connected to the side of the fixing plate away from the protective box.

[0008] The output end of the drive motor is fixedly connected to a central gear, and the outer surface of the central gear is meshed with a transmission gear. The transmission gears are connected in three sets on the outer surface of the central gear, and the transmission gears are meshed between the limiting gear ring plate and the central gear.

[0009] The transmission gear is fixedly connected to a linkage rod at its center. A sealing plate is provided on the outer surface of the linkage rod, and a seepage-proof plate is rotatably connected inside the sealing plate.

[0010] The end of the linkage rod furthest from the transmission gear is fixedly connected to the screw, which is movably connected inside the extruder housing.

[0011] This utility model has at least the following beneficial effects: 1. In use, this utility model utilizes a planetary transmission structure consisting of a protective box, a drive motor, a central gear, three sets of transmission gears, a limiting gear ring plate, and a linkage rod within the drive assembly. The drive motor rotates the central gear, causing the three sets of transmission gears to rotate planetarily under the constraint of the limiting gear ring plate. The linkage rod then drives the screw. This structure evenly distributes the driving force, reducing the contact pressure on the screw when conveying raw materials. It is suitable for the rapid and uniform conveying of low-viscosity materials, and can also handle high-viscosity materials without causing screw jamming or deformation. This meets the requirements for feeding materials of various viscosities and improves the equipment's adaptability to different cable materials.

[0012] 2. In use, the sealing plate on the outer surface of the linkage rod and the seepage-proof plate rotatably connected inside, together with the connection structure between the drive assembly and the screw, can effectively prevent the leakage of molten raw materials or dust inside the extruder housing through the gap between the linkage rod and the protective box. This avoids waste of raw materials and prevents the leaked material from contaminating the central gear, transmission gear and other transmission components in the drive assembly, ensuring the long-term stable operation of the drive assembly and extending the overall service life of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the external connection structure of the extruder housing and the feed hopper of this utility model; Figure 3 This is a three-dimensional schematic diagram of the external appearance of the structural drive component of this utility model; Figure 4 This is an exploded view of the structural drive component of this utility model.

[0014] In the diagram: 1. Workbench; 2. Extruder housing; 3. Feed hopper; 4. Drive assembly; 41. Protective box; 42. Drive motor; 43. Fixing plate; 44. Limiting gear ring plate; 45. Center gear; 46. Transmission gear; 47. Linkage rod; 48. Sealing plate; 49. Leak-proof plate; 5. Screw. 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] Please see Figure 1-4 This utility model provides a technical solution: an extruder for producing cables, comprising: a worktable 1, an extruder housing 2 fixedly connected to the upper surface of the worktable 1, a feed hopper 3 fixedly connected to the upper surface of the extruder housing 2, a drive assembly 4 provided on the outer surface of the extruder housing 2, a screw 5 fixedly connected to the output end of the drive assembly 4, and multiple sets of screws 5 provided at the output end of the drive assembly 4, the drive assembly 4 driving the multiple sets of screws 5 to rotate synchronously, and adjusting the contact pressure between the screws 5 and the raw material inside the extruder housing 2.

[0017] In operation, the drive assembly 4 utilizes a planetary transmission structure consisting of a protective housing 41, a drive motor 42, a central gear 45, three sets of transmission gears 46, a limiting gear ring plate 44, and a linkage rod 47. The drive motor 42 rotates the central gear 45, causing the three sets of transmission gears 46 to rotate planetarily under the constraint of the limiting gear ring plate 44. This rotation, in turn, drives the screw 5 via the linkage rod 47. This structure evenly distributes the driving force, reducing the contact pressure on the screw 5 when conveying raw materials. It is suitable for the rapid and uniform conveying of low-viscosity materials, and can also handle high-viscosity materials without causing screw jamming or deformation. This meets the requirements for feeding materials of various viscosities and improves the equipment's adaptability to different cable materials.

[0018] The feed hopper 3 is fixedly connected to the upper end of the extruder housing 2 near the drive assembly 4, and the feed hopper 3 is connected through the interior of the extruder housing 2. The drive assembly 4 includes a protective box 41, a drive motor 42 is fixedly connected inside the protective box 41, a fixing plate 43 is fixedly connected to the outer surface of the protective box 41, and a limit toothed ring plate 44 is fixedly connected to the side of the fixing plate 43 away from the protective box 41.

[0019] The output end of the drive motor 42 is fixedly connected to a central gear 45. A transmission gear 46 is meshed with the outer surface of the central gear 45. The transmission gear 46 is meshed with the outer surface of the central gear 45 in three sets. The transmission gear 46 is meshed between the limiting gear ring plate 44 and the central gear 45.

[0020] A linkage rod 47 is fixedly connected to the center of the transmission gear 46. A sealing plate 48 is provided on the outer surface of the linkage rod 47, and a seepage-proof plate 49 is rotatably connected inside the sealing plate 48. The end of the linkage rod 47 away from the transmission gear 46 is fixedly connected to the screw 5, and the screw 5 is movably connected inside the extruder housing 2.

[0021] In operation, raw materials required for cable production, such as PVC and PE granules, are first poured into the feed hopper 3. The feed hopper 3 is fixed above the end of the extruder housing 2 near the drive assembly 4 and extends into the interior of the extruder housing 2. The raw materials can directly enter the screw 5 area inside the extruder housing 2 through the feed hopper 3, preparing the raw materials for subsequent extrusion processes. Subsequently, based on the viscosity parameters of the raw materials to be conveyed, the pressure adaptation mode of the drive assembly 4 is preset through the control system of the extruder housing 2. For low-viscosity raw materials (such as low-density PE granules), the extrusion pressure of the screw 5 during conveying needs to be reduced to avoid the raw materials flowing too fast and causing accumulation. For high-viscosity raw materials (such as cross-linked polyethylene granules), the extrusion pressure needs to be increased to overcome the flow resistance of the raw materials and prevent the screw from jamming. This pressure adjustment process is achieved by dynamically adjusting the output power of the drive motor 42, which in turn acts on the planetary transmission structure of the drive assembly 4.

[0022] After the drive assembly 4 is activated, the protective box 41 provides protection for the internal components, preventing external dust and impurities from affecting the transmission stability. The drive motor 42 inside the protective box 41 adjusts its output power according to a preset pressure mode: when conveying low-viscosity raw materials, the drive motor 42 reduces its output power, causing the torque of the fixed central gear 45 to decrease and its rotational speed to remain stable. The central gear 45, as the power input end of the planetary transmission, directly transmits its torque changes to the three sets of meshing planetary gears: namely, the transmission gear 46. Since the transmission gear 46 meshes simultaneously with the central gear 45 and the limiting gear ring plate 44, when the central gear 45 outputs low torque, the meshing force on the transmission gear 46 decreases, and its revolution speed around the central gear 45 remains stable, matching the rotational speed of the central gear 45, ensuring a uniform raw material conveying rhythm, while its own rotational speed decreases accordingly. This low-rotation, stable revolution transmission state is transmitted to the screw 5 through the linkage rod 47, so that the screw 5 rotates with a lower extrusion force. This avoids uneven conveying of low-viscosity raw materials due to excessive pressure and rapid extrusion, and also prevents the raw materials from forming "bridges" and accumulating below the feed hopper 3, ensuring that the low-viscosity raw materials move smoothly forward along the spiral groove of the screw 5.

[0023] When conveying high-viscosity raw materials, the drive motor 42 increases its output power, the torque of the central gear 45 increases, and the speed is finely adjusted to the appropriate range. When the central gear 45 outputs high torque, the meshing force on the transmission gear 46 is enhanced. Under the constraint of the limiting gear ring plate 44, its revolution speed remains stable and synchronized with the speed of the central gear 45 (avoiding fluctuations in the conveying rate from affecting the cable forming accuracy), while its own rotation speed is significantly increased. The high rotation and stable revolution transmission characteristics of the transmission gear 46 are converted into high-torque rotation of the screw 5 through the linkage rod 47: the extrusion pressure of the screw 5 is increased accordingly, which can effectively overcome the resistance of the high-viscosity raw materials flowing in the spiral groove, avoiding conveying jams or screw deformation caused by excessive resistance; at the same time, the multi-tooth meshing structure of the transmission gear 46 evenly distributes the high torque of the central gear 45 to the three sets of linkage rods 47, so that the force on each section of the screw 5 is balanced, and the spiral groove will not be worn due to local pressure concentration, further extending the service life of the screw.

[0024] The linkage rod 47, fixed at the center of the transmission gear 46, moves synchronously with the revolution and rotation of the transmission gear 46. This, in turn, drives the screw 5, fixed at the end of the linkage rod 47 away from the transmission gear 46, to rotate inside the extruder housing 2. During the rotation of the screw 5, the raw material falling into the feed hopper 3 is conveyed and extruded. This design, which adjusts the rotation and revolution speed of the transmission gear 46 by the output power of the central gear 45, achieves a precise match between the extrusion pressure of the screw 5 and the viscosity of the raw material: low viscosity raw materials correspond to low rotation and low pressure, ensuring uniform conveying; high viscosity raw materials correspond to high rotation and high pressure, ensuring smooth conveying. This solves the problem that the fixed pressure in traditional single-gear transmission cannot adapt to raw materials of different viscosities, allowing the same extruder housing to flexibly meet the production needs of cables of different materials.

[0025] Meanwhile, the sealing plate 48 on the outer surface of the linkage rod 47 cooperates with the internally rotating seepage-proof plate 49 to effectively prevent leakage of molten raw material or raw material dust inside the extruder housing 2 through the gap between the linkage rod 47 and the protective box 41, even during the dynamic adjustment of the screw 5's extrusion pressure. This prevents material waste and avoids leakage from contaminating the central gear 45, transmission gear 46, and other transmission components inside the drive assembly 4, ensuring stable operation of the planetary transmission structure under different pressure modes. Finally, the screw 5 continuously and evenly delivers the raw material to the extrusion end of the extruder housing 2, completing the extrusion molding of the cable. The entire process, through the power, speed, and pressure linkage adjustment of the planetary transmission structure, achieves dynamic pressure adaptation and stable drive of the screw 5, improving the extruder housing's adaptability to raw materials of different viscosities and ensuring the stability and durability of the equipment operation.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An extruder for producing a wire cable, comprising: The worktable is characterized in that: an extruder housing is fixedly connected to the upper surface of the worktable, a feed hopper is fixedly connected to the upper surface of the extruder housing, a drive assembly is provided on the outer surface of the extruder housing, a screw is fixedly connected to the output end of the drive assembly, multiple sets of screws are provided at the output end of the drive assembly, the drive assembly drives the multiple sets of screws to rotate synchronously, and adjusts the contact pressure between the screws and the raw material inside the extruder housing.

2. An extruder for producing a wire cable according to claim 1, characterized in that: The feed hopper is fixedly connected to the upper end of the extruder housing near the drive assembly, and the feed hopper is connected through the interior of the extruder housing.

3. An extruder for producing cables according to claim 2, characterized in that: The drive assembly includes a protective housing, a drive motor is fixedly connected inside the protective housing, a fixing plate is fixedly connected to the outer surface of the protective housing, and a limit toothed ring plate is fixedly connected to the side of the fixing plate away from the protective housing.

4. An extruder for producing a wire cable according to claim 3, characterized in that: The output end of the drive motor is fixedly connected to a central gear, and a transmission gear is meshed with the outer surface of the central gear. The transmission gears are connected in three sets on the outer surface of the central gear, and the transmission gears are meshed between the limiting gear ring plate and the central gear.

5. An extruder for producing cables according to claim 4, characterized in that: A linkage rod is fixedly connected to the center of the transmission gear, and a sealing plate is provided on the outer surface of the linkage rod. An anti-seepage plate is rotatably connected inside the sealing plate.

6. An extruder for producing cables according to claim 5, characterized in that: The end of the linkage rod furthest from the transmission gear is fixedly connected to the screw, and the screw is movably connected inside the extruder housing.

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