Cable extruder with temperature control

Abstract

The present disclosure relates to the technical field of extruders, and one embodiment of the present disclosure provides a cable extruder facilitating temperature control, which comprises an extruder body, a feeding box and a circulating water tank, the feeding box is arranged at the top of the extruder body, the circulating water tank is arranged at the bottom of the extruder body, a circulating cooling assembly is arranged on the circulating water tank and the extruder body, a top frame is fixed at the top of the feeding box, a feeding preheating assembly is arranged on the top frame, and the circulating cooling assembly comprises a pair of outer covers, a convex layer is attached to the two end faces of the outer cover, and a water inlet cover is arranged on the outer cover at the top. Through the above technical solution, the technical problem that the violent friction between the screw and the barrel and the material shearing will generate a large amount of heat, resulting in a sharp rise in the temperature in the barrel and uneven distribution, and the existing equipment lacks an effective preheating and temperature control mechanism for the pellets or powder entering the extruder, and the low-temperature material directly put into the high-temperature barrel will cause unstable melting speed due to the large temperature difference.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of extruder-related technology, and more specifically, to a cable extruder that is easy to control in temperature. Background Technology

[0002] In cable manufacturing, the extruder is the core equipment for achieving insulation and sheath coating, and its temperature control accuracy directly determines the physical properties and appearance quality of the product. Current cable extruders have significant shortcomings in temperature management, which restricts production stability and product qualification rates.

[0003] Traditional extruders generate significant heat during high-speed operation due to intense friction between the screw and barrel, as well as material shearing. This leads to a rapid and uneven temperature rise within the barrel. Failure to manage this heat promptly can cause plastic melt degradation, resulting in defects such as bubbles and charred particles in the cable insulation layer, and in severe cases, even equipment jamming. Furthermore, existing equipment lacks an effective preheating and temperature control mechanism for the granules or powders entering the extruder. Directly feeding low-temperature materials into the high-temperature barrel causes unstable melting rates due to excessive temperature differences, extending production preparation time and causing fluctuations in extrusion volume, resulting in excessive deviations in the cable's outer diameter.

[0004] Furthermore, most extruder temperature control systems can only heat the barrel in sections, and cannot adjust the compensation for frictional and shear heat in real time according to material characteristics and extrusion speed. When changing cable specifications or raw material types, several hours of temperature adjustment are required, severely impacting production efficiency. With the increasing demand for high-voltage, high-temperature resistant cables, the requirements for the precision of temperature control in the extrusion process are becoming increasingly stringent, and the deficiencies of traditional equipment in temperature control have become a major obstacle to industry upgrades. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a cable extruder that is easy to control temperature. This solves the technical problems in the prior art, such as the large amount of heat generated by the intense friction between the screw and the barrel and the shearing of the material, which leads to a sharp rise and uneven distribution of temperature inside the barrel, and the lack of an effective preheating and temperature control mechanism for the granules or powders entering the extruder in the existing equipment, which causes unstable melting speed due to excessive temperature difference when low-temperature materials are directly fed into the high-temperature barrel.

[0006] According to one aspect, at least one embodiment of this disclosure provides a cable extruder that facilitates temperature control, comprising: The extruder body, the feed box, and the circulating water tank are provided. The feed box is located at the top of the extruder body, and the circulating water tank is located at the bottom of the extruder body. A circulating cooling component is disposed on the circulating water tank and the extruder body; The top frame and the feeding preheating assembly are provided, wherein the top frame is fixed to the top of the feeding box and the feeding preheating assembly is mounted on the top frame; The circulating cooling assembly includes an outer cover, which is fitted onto the outside of the extruder body. The surface of the extruder body is provided with a pair of raised layers, which are attached to the inner end faces of the outer cover around the perimeter. A water inlet cover is provided on the top of the outer cover.

[0007] As a further technical solution, the water inlet cover is connected to the output end of the circulating water tank by a water inlet pipe, the bottom of the outer cover located at the bottom is connected to the circulating water tank by a return pipe, and a heat dissipation fin is provided on one side of the circulating water tank.

[0008] As a further technical solution, the heat-conducting part of the heat dissipation fins is located inside the circulating water tank, and a pair of horizontal plates are provided on the outer surface of the circulating water tank. The horizontal plates are located at the top and bottom of the heat dissipation fins, and a number of cooling fans are installed in the horizontal plates, all of which face the heat dissipation fins.

[0009] As a further technical solution, the feeding preheating assembly includes a central shaft, which is fixed inside the top frame. The lower end of the central shaft is located inside the feeding box, and a rotating sleeve is rotatably connected to the central shaft.

[0010] As a further technical solution, a number of push rods are arranged around the outer surface of the rotating sleeve, a spiral blade is arranged at the lower end of the outer surface of the rotating sleeve, a heating tube is arranged inside the central shaft, a drive wheel driven by electricity is arranged at the bottom of the top frame, a transmission wheel is arranged outside the rotating sleeve, and the drive wheel and the transmission wheel are connected by belt drive.

[0011] As a further technical solution, the bottom of the feed box is a converging transition structure located at the spiral blade section.

[0012] As a further technical solution, both of the outer covers are semi-circular structures.

[0013] As a further technical solution, the rotating sleeve, the push rod, and the spiral blade are all made of thermally conductive materials.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the circulating cooling component solves the problem of excessively high and uneven barrel temperature distribution through closed-loop water cooling and forced heat dissipation. The outer casing and the raised layer form a sealed cooling chamber, where cooling water evenly surrounds the barrel to absorb heat. After flowing back to the water tank, it is rapidly cooled by heat dissipation fins and a fan, achieving recycling. This design precisely controls the barrel temperature, preventing material degradation, reducing defects such as bubbles and coke particles, and adapting to the heat dissipation requirements of different extrusion speeds, thereby improving product yield and equipment stability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; Figure 4 This is another isometric sectional view of this disclosure; Figure 5 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle; In the diagram: 1. Extruder body; 2. Feed box; 3. Circulating water tank; 4. Top frame; 5. Circulating cooling assembly; 5-1. Outer cover; 5-2. Raised layer; 5-3. Water inlet cover; 5-4. Water inlet pipe; 5-5. Return pipe; 5-6. Heat dissipation fins; 5-7. Horizontal plate; 5-8. Cooling fan; 6. Feed preheating assembly; 6-1. Central shaft; 6-2. Rotating sleeve; 6-3. Push rod; 6-4. Spiral blade; 6-5. Heating tube; 6-6. Drive wheel; 6-7. Transmission wheel. Detailed Implementation

[0017] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0020] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, 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 this disclosure.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-5 As shown, it illustrates a temperature-controlled cable extruder according to an embodiment of the present disclosure, comprising: The extruder body 1, the feed box 2, and the circulating water tank 3 are provided. The feed box 2 is located at the top of the extruder body 1, and the circulating water tank 3 is located at the bottom of the extruder body 1. A circulating cooling component 5 is disposed on the circulating water tank 3 and the extruder body 1; The top frame 4 and the feeding preheating assembly 6 are provided. The top frame 4 is fixed to the top of the feeding box 2, and the feeding preheating assembly 6 is disposed on the top frame 4. The circulating cooling component 5 includes an outer cover 5-1, which is fitted onto the outside of the extruder body 1. The surface of the extruder body 1 is provided with a pair of raised layers 5-2, which are attached to the inner end faces of the outer cover 5-1. A water inlet cover 5-3 is provided on the top of the outer cover 5-1. The water inlet cover 5-3 is connected to the output end of the circulating water tank 3 by a water inlet pipe 5-4. A return pipe 5-5 is connected between the bottom of the outer cover 5-1 and the circulating water tank 3. A heat dissipation fin 5-6 is provided on one side of the circulating water tank 3. The heat-conducting part of the heat dissipation fin 5-6 is located inside the circulating water tank 3. A pair of horizontal plates 5-7 are provided on the outer surface of the circulating water tank 3. The horizontal plates 5-7 are located at the top and bottom of the heat dissipation fin 5-6. Several cooling fans 5-8 are installed in the horizontal plates 5-7, and the cooling fans 5-8 are all facing the heat dissipation fin 5-6.

[0024] In some examples, to achieve continuous cooling of the extruder body 1, the outer cover 5-1 of the extruder body 1 is fixed with bolts, symmetrically distributed, forming an annular cooling chamber with the body. The raised layer 5-2 on the surface surrounds the body and fits against the inner two end faces of the outer cover 5-1. The sealing is enhanced by sealing rings to prevent cooling water leakage. The water inlet cover 5-3 on the top outer cover 5-1 is connected to the water inlet pipe 5-4 at the output end of the circulating water tank 3 via a flange. The return pipe 5-5 at the bottom of the bottom outer cover 5-1 is connected at one end to the outer cover 5-1 and at the other end to the circulating water tank 3, forming a closed-loop water circuit. The heat dissipation fins 5-6 on one side of the circulating water tank 3 are fixed with thermally conductive adhesive, and the heat-conducting part is inserted into the water tank. The horizontal plate 5-7 on the surface is fixed by a bracket and is located at the top and bottom of the heat dissipation fins 5-6. The cooling fan 5-8 is installed in the horizontal plate 5-7 with a clip, and the air outlet faces the heat dissipation fins 5-6.

[0025] During operation, cooling water in the circulating water tank 3 is pumped into the inlet cover 5-3 via the inlet pipe 5-4, flows into the cooling chamber between the outer cover 5-1 and the extruder body 1, absorbs the heat generated by the extruder, and then flows back to the circulating water tank 3 via the return pipe 5-5. The cooling fan 5-8 starts, blowing air onto the heat dissipation fins 5-6, accelerating airflow over the fin surface, dissipating heat from the water tank to the outside, and lowering the water temperature for recirculation. The raised layer 5-2, in conjunction with the sealing ring, ensures the sealing performance of the cooling chamber, allowing the cooling water to fully envelop the extruder body 1, improving heat exchange efficiency; the heat dissipation fins 5-6 increase the heat dissipation area, and the cooling fan 5-8 enhances air convection, accelerating heat dissipation. This component, through a combination of cooling water circulation and forced cooling, continuously removes heat from the extruder, ensuring a stable operating temperature and preventing overheating from affecting the cable extrusion quality.

[0026] like Figures 1-5As shown in the figure, the feeding preheating assembly 6 in this embodiment includes a central shaft 6-1, which is fixed inside the top frame 4. The lower end of the central shaft 6-1 is located inside the feeding box 2. A rotating sleeve 6-2 is rotatably connected to the central shaft 6-1. Several push rods 6-3 are arranged around the outer surface of the rotating sleeve 6-2. A spiral blade 6-4 is arranged at the lower end of the outer surface of the rotating sleeve 6-2. A heating tube 6-5 is arranged inside the central shaft 6-1. A drive wheel 6-6 driven by electricity is arranged at the bottom of the top frame 4. A transmission wheel 6-7 is arranged outside the rotating sleeve 6-2. The drive wheel 6-6 and the transmission wheel 6-7 are connected by a belt drive.

[0027] In some examples, to achieve stable material feeding and prevent clogging, a central shaft 6-1 inside the top frame 4 is vertically fixed, with its lower end extending into the feed box 2. A rotating sleeve 6-2 is rotatably mounted on the central shaft 6-1 via bearings. Push rods 6-3 are radially distributed around the outer surface, and spiral blades 6-4 at their lower ends are welded and fixed to the rotating sleeve 6-2, with the blade edges adhering to the inner wall of the feed box 2. Heating tubes 6-5 inside the central shaft 6-1 are installed axially to generate heat and conduct it to the surrounding area. The drive wheel 6-6 at the bottom of the top frame 4 is driven to rotate by a motor, and the transmission wheel 6-7 outside the rotating sleeve 6-2 is connected to the drive wheel 6-6 via a belt drive.

[0028] During operation, the motor drives the drive wheel 6-6 to rotate, which in turn drives the transmission wheel 6-7 to rotate the rotating sleeve 6-2 around the central shaft 6-1 via belt transmission. The pusher rod 6-3 rotates with the rotating sleeve 6-2, pushing the raw material at the top of the feed box 2 downwards. The spiral blades 6-4 further convey the raw material to the extruder body 1. The heating tube 6-5 is energized and generates heat, which is conducted through the central shaft 6-1 to the rotating sleeve 6-2, pusher rod 6-3, and spiral blades 6-4, preheating the raw material, reducing its viscosity, and enhancing its flowability. The rotation of the pusher rod 6-3 breaks up agglomerated raw materials, preventing blockage of the feed inlet; the continuous conveying of the spiral blades 6-4 ensures uniform and stable feeding, forming a stepped feeding system in conjunction with the pusher rod 6-3. The rotational cooperation between the central shaft 6-1 and the rotating sleeve 6-2 ensures structural stability, the heat conduction of the heating tube 6-5 preheats the raw material, and the belt drive provides reliable power. This component combines mechanical pushing with heating to prevent raw material blockage and preheat the raw material, thereby improving the extruder's feeding efficiency and extrusion stability.

[0029] For example, such as Figure 3 As shown, the bottom of the feed box 2 is a converging transition structure located at the part of the spiral blade 6-4.

[0030] In some examples, the convergence transition structure at the bottom of the feed box 2, located within the helical blade 6-4 section, guides the raw material to precisely converge toward the extruder body 1. This convergence design, in conjunction with the helical blade 6-4, enhances the concentration of the raw material feed, prevents material residue at the bottom, and allows the preheated material to enter the extruder more smoothly, improving feeding efficiency and reducing waste.

[0031] For example, such as Figure 1 As shown, both of the outer covers 5-1 have a semi-circular structure.

[0032] In some examples, a pair of semi-circular outer covers 5-1 are designed to be fitted onto the outside of the extruder body 1. The semi-circular design facilitates installation and removal, conforms to the shape of the extruder body 1, and creates a uniform cooling chamber between the outer cover 5-1 and the body, ensuring that cooling water fully surrounds the body, improving the cooling effect, and facilitating maintenance of the extruder body 1.

[0033] For example, such as Figure 3 As shown, the rotating sleeve 6-2, the push rod 6-3, and the spiral blade 6-4 are all made of thermally conductive materials.

[0034] In some examples, the rotating sleeve 6-2, the push rod 6-3, and the spiral blade 6-4 are made of thermally conductive materials, which can efficiently transfer the heat from the heating tube 6-5. The thermally conductive material allows heat to spread rapidly to all parts in contact with the raw material, making the raw material more evenly heated, enhancing the preheating effect, improving the flowability of the raw material, further preventing blockage, and ensuring stable feeding.

[0035] In actual use: Raw materials are fed into the feed box 2. The drive wheel 6-6 drives the transmission wheel 6-7 via a belt, causing the rotating sleeve 6-2 to rotate. The push rod 6-3 and the spiral blades 6-4 push the raw materials. The heat generated by the heating tube 6-5 inside the central shaft 6-1 preheats the raw materials through the heat-conducting components. Cooling water from the circulating water tank 3 enters the outer cover 5-1 through the inlet pipe 5-4, flows and absorbs heat between the extruder body 1 and the outer cover 5-1, and then returns to the water tank through the return pipe 5-5. The cooling fan 5-8 blows air onto the cooling fins 5-6 to accelerate cooling. The preheated raw materials enter the extruder body 1. The outer cover 5-1 continuously cools and controls the barrel temperature. The converging structure guides the raw materials to enter precisely, achieving coordinated preheating and temperature control throughout the process to ensure stable extrusion.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A cable extruder with easy temperature control, characterized in that, include: The extruder body (1), the feed box (2) and the circulating water tank (3) are provided. The feed box (2) is located on the top of the extruder body (1) and the circulating water tank (3) is located at the bottom of the extruder body (1). A circulating cooling component (5) is provided on the circulating water tank (3) and the extruder body (1); The top frame (4) and the feeding preheating assembly (6) are provided on the top frame (4), the top frame (4) is fixed on the top of the feeding box (2), and the feeding preheating assembly (6) is provided on the top frame (4); The circulating cooling component (5) includes an outer cover (5-1), which is fitted onto the outside of the extruder body (1). The surface of the extruder body (1) is provided with a pair of protrusions (5-2), which are attached to the inner end faces of the outer cover (5-1) around the perimeter. A water inlet cover (5-3) is provided on the top of the outer cover (5-1).

2. The cable extruder with easy temperature control according to claim 1, characterized in that, The water inlet cover (5-3) is connected to the output end of the circulating water tank (3) by a water inlet pipe (5-4). The bottom of the outer cover (5-1) located at the bottom is connected to the circulating water tank (3) by a return pipe (5-5). A heat dissipation fin (5-6) is provided on one side of the circulating water tank (3).

3. The cable extruder with easy temperature control according to claim 2, characterized in that, The heat-conducting portion of the heat dissipation fins (5-6) is located inside the circulating water tank (3). A pair of horizontal plates (5-7) are provided on the outer surface of the circulating water tank (3). The horizontal plates (5-7) are located at the top and bottom of the heat dissipation fins (5-6). Several cooling fans (5-8) are installed in the horizontal plates (5-7), and the cooling fans (5-8) are all facing the heat dissipation fins (5-6).

4. The cable extruder with easy temperature control according to claim 1, characterized in that, The feeding preheating assembly (6) includes a central shaft (6-1), which is fixed inside the top frame (4). The lower end of the central shaft (6-1) is located inside the feeding box (2), and a rotating sleeve (6-2) is rotatably connected to the central shaft (6-1).

5. A cable extruder with easy temperature control according to claim 4, characterized in that, The outer surface of the rotating sleeve (6-2) is provided with a plurality of push rods (6-3), the lower end of the outer surface of the rotating sleeve (6-2) is provided with a spiral blade (6-4), the heating tube (6-5) is provided inside the central shaft (6-1), the bottom of the top frame is provided with a drive wheel (6-6) that is driven by electricity, and the outside of the rotating sleeve (6-2) is provided with a transmission wheel (6-7). The drive wheel (6-6) and the transmission wheel (6-7) are connected by belt drive.

6. A cable extruder with easy temperature control according to claim 5, characterized in that, The bottom of the feed box (2) is a convergence transition structure located at the part of the spiral blade (6-4).

7. A cable extruder with easy temperature control according to claim 1, characterized in that, Both of the outer covers (5-1) are semi-circular structures.

8. A cable extruder with easy temperature control according to claim 5, characterized in that, The rotating sleeve (6-2), the push rod (6-3), and the spiral blade (6-4) are all made of thermally conductive materials.

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