A connecting line production and manufacturing device

Abstract

The application relates to the technical field of cable processing equipment, and discloses a connecting wire production and manufacturing device, which comprises an extruding machine, a hopper is fixedly connected to the top of the extruding machine, a material pipe is fixedly connected to the top of the hopper, a machine cylinder is fixedly connected to the output end of the hopper, a processing mechanism for coating an insulating layer on the outer surface of a conductor is arranged at the output end of the machine cylinder, the processing mechanism comprises a die head, the die head is fixedly connected to the output end of the machine cylinder, the outer wall of the die head is fixedly connected with a shaping pipe, the groove arranged on the outer surface of the core die can increase the flow passage sectional area, the melt backflow phenomenon is inhibited, the spiral boss can make the melt distribution more uniform through the flow guiding effect, the annular buffer groove can absorb pressure fluctuation through volume expansion, effective buffering is completed before the fluctuation is transmitted to the forming area, and thus the problems of unstable discharging, air holes in the insulating layer and the like caused by pressure fluctuation in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of cable processing equipment technology, specifically to a connecting wire manufacturing equipment. Background Technology

[0002] As a fundamental core component for power supply and signal transmission, connecting wires are widely used in many fields such as consumer electronics, industrial automation, smart homes, new energy equipment, and rail transportation. In practical applications, connecting wires require insulation layers with excellent insulation, wear resistance, and environmental adaptability. Therefore, extrusion is often used to coat the conductor with an insulation layer. This process uses an extruder to extrude molten plastic onto the outer periphery of the conductor, forming a continuous, dense, and tightly bonded insulating protective layer, effectively ensuring the product's temperature resistance, oil resistance, aging resistance, and mechanical protection performance.

[0003] In summary, during the process of extruding molten plastic onto the outer periphery of the conductor, the dead zones inside the die head are prone to slow or even stagnant melt flow. When the upstream screw continuously pushes the material, the stagnant melt obstructs the main fluid, forcing some plastic to flow back along the path of least resistance, forming a backflow phenomenon. This further exacerbates the pressure fluctuations inside the die head. The repeated backflow of molten plastic under unstable pressure results in uneven output, product size fluctuations, and the generation of pores or bubbles inside the insulation layer, severely affecting the insulation performance of the connecting wire.

[0004] To address this, we propose a connector manufacturing equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a connector manufacturing equipment. Plastic granules enter the barrel through a hopper, where a screw heats, shears, and plasticizes them, forming a uniform molten plastic that is continuously conveyed to the processing mechanism. The melt enters the flow channel between the core mold and the die, where a spiral boss guides the flow, creating a circumferential swirling flow and achieving uniform melt distribution, effectively improving the problem of eccentricity. A buffer groove in the middle of the spiral boss absorbs pressure fluctuations by increasing its volume, allowing the melt to enter the shaping area at a stable pressure. Simultaneously, the conductor is initially guided by a first positioning tube and then centered at the core mold center by a coaxially arranged second positioning tube, ensuring the concentricity accuracy of the extrusion coating. Furthermore, the core mold conducts the heat of the molten plastic in the flow channel to the fins and further to the rectangular plates, utilizing their decreasing axial height to form a gradient heating zone, achieving gradual preheating of the conductor. Finally, the molten plastic stably and uniformly coats the outer periphery of the conductor within the shaping tube, forming a continuous insulating layer, thus achieving the extrusion molding of the connector insulation layer and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a connecting wire manufacturing equipment, including an extruder, a hopper fixedly connected to the top of the extruder, a material pipe fixedly connected to the top of the hopper, a cylinder fixedly connected to the output end of the hopper, and a processing mechanism for coating an insulating layer onto the outer surface of a conductor provided at the output end of the cylinder.

[0007] Preferably, the processing mechanism includes a die, which is fixedly connected to the output end of the barrel. A shaping tube is fixedly connected to the outer wall of the die. The shaping tube is used to shape the insulating layer covering the outer surface of the conductor to ensure the outer diameter and roundness of the insulating layer. A connecting frame is provided on the side of the die away from the shaping tube. An auxiliary component for buffering and heat conduction of the molten plastic is provided between the die and the connecting frame.

[0008] Preferably, the auxiliary component includes a core mold, which is movably mounted on the outer surface of the die. A second positioning tube is fixedly connected to the side of the core mold near the shaping tube. An installation groove is provided on the side of the core mold away from the second positioning tube. A connecting rod is movably inserted into the installation groove. The outer surface of the connecting rod is provided with fins. At the same time, the second positioning tube is coaxially arranged with the first positioning tube to keep the conductor passing through it in the center position of the core mold.

[0009] More specifically, the fins decrease in height sequentially along the connecting rod towards the second positioning tube. The fins are used to preheat the conductor before it enters the second positioning tube. By setting fins and rectangular plates with progressively decreasing heights on the connecting rod, the heat of the molten plastic in the flow channel is conducted to the fins, thereby preheating the conductor in a gradient manner. The conductor passes through low-temperature, medium-temperature, and high-temperature preheating zones in sequence, achieving a gradual temperature rise and avoiding thermal shock. At the same time, the rectangular plates can increase the heat dissipation area and improve the preheating efficiency. After preheating, the surface temperature of the conductor rises, and the melt maintains good fluidity during the coating process, which can fully fill the gaps on the conductor surface and the gaps between strands, thereby improving the adhesion between the insulation layer and the conductor. The rectangular plates are fixedly connected to the side of the fins near the second positioning tube.

[0010] Based on the above, a first positioning tube is fixedly connected to the inner wall of the connecting frame. A through hole is opened on the outer surface of the first positioning tube. A pressing part is provided on the side of the connecting frame near the auxiliary component. The pressing part forms a contact fit with the outer surface of the connecting rod, and the connecting rod is fixed in the mounting groove by mechanical pressing.

[0011] In the above technical solution, a flow channel for guiding the flow of molten plastic is formed between the die and the core mold. The outer surface of the core mold is provided with a groove. The groove on the outer surface of the core mold can increase the cross-sectional area of ​​the flow channel and suppress the backflow of melt. The spiral boss can make the melt distribution more uniform through the flow guiding effect. The annular buffer groove absorbs pressure fluctuations through volume expansion and completes effective buffering before the fluctuations are transmitted to the molding zone, thereby solving the problems of unstable material output and air holes in the insulating layer caused by pressure fluctuations in the prior art.

[0012] Furthermore, a spiral boss is fixedly connected to the outer surface of the core mold near the groove. The spiral boss can increase the effective flow path of the melt, prolong its residence time in the flow channel, which is conducive to the homogenization of the internal temperature field of the melt and the reduction of the internal and external temperature difference. The shearing effect of the spiral structure on the melt can also eliminate the temperature stratification and viscosity stratification formed during screw extrusion, suppress local pressure fluctuations in the flow channel, and further improve the stability of the extrusion process and the quality of cable coating molding. The spiral boss is used to guide the molten plastic to the end of the second positioning tube and make the molten plastic flow circumferentially in the flow channel. A buffer groove is provided on the side of the core mold near the spiral boss. It is worth noting that the buffer groove is an annular groove. The buffer groove absorbs pressure fluctuations by increasing the volume and is used to buffer the pressure fluctuations generated by the molten plastic during the conveying process.

[0013] Compared with existing technologies, it has the following beneficial effects: 1. In this connecting wire manufacturing equipment, the groove set on the outer surface of the core mold can increase the cross-sectional area of ​​the flow channel and suppress the backflow of the melt. The spiral boss can make the melt distribution more uniform through the flow guiding effect. The annular buffer groove absorbs pressure fluctuations through volume expansion and completes effective buffering before the fluctuations are transmitted to the forming area, thereby solving the problems of unstable material output and air holes in the insulation layer caused by pressure fluctuations in the existing technology.

[0014] 2. In this connecting wire manufacturing equipment, by setting fins and rectangular plates with progressively decreasing heights on the connecting rod, the heat of the molten plastic in the flow channel is conducted to the fins, thereby preheating the conductor in a gradient manner. The conductor passes through low-temperature, medium-temperature, and high-temperature preheating zones in sequence, achieving a gradual temperature rise and avoiding thermal shock. At the same time, the rectangular plates can increase the heat dissipation area and improve the preheating efficiency. After preheating, the surface temperature of the conductor rises, and the melt maintains good fluidity during the coating process, which can fully fill the gaps on the conductor surface and the gaps between strands, thereby improving the adhesion between the insulation layer and the conductor. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1This is a schematic diagram of the overall front structure of the present invention; Figure 2 This is a schematic diagram of the processing mechanism structure of the present invention; Figure 3 This is a cross-sectional view of the processing mechanism of the present invention; Figure 4 This is an exploded view of the processing mechanism of the present invention; Figure 5 This is a cross-sectional view of the auxiliary component of the present invention; Figure 6 This is a schematic diagram of the auxiliary component structure of the present invention; Figure 7 For the present invention Figure 3 A magnified structural diagram of A in the middle.

[0016] The meanings of the labels in the diagram are as follows: In the diagram: 1. Extruder; 2. Hopper; 3. Material tube; 4. Barrel; 5. Processing mechanism; 501. Die; 502. Shaping tube; 503. Connecting frame; 504. First positioning tube; 5041. Through hole; 5042. Extrusion section; 505. Flow channel; 506. Auxiliary components; 5061. Core mold; 5062. Mounting groove; 5063. Second positioning tube; 5064. Groove; 5065. Spiral boss; 5066. Buffer groove; 5067. Connecting rod; 5068. Fin; 5069. Rectangular plate. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0019] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] When molten plastic is extruded around the conductor, the dead corner area inside the die head is prone to slow melt flow or even stagnation. As the upstream screw continuously pushes the material, the stagnant melt obstructs the flow of the main fluid, forcing some melt to flow back along the path of least resistance, forming a counterflow. This exacerbates the air pressure fluctuation inside the die head, resulting in uneven output, product size fluctuations, and the generation of pores or bubbles inside the insulation layer, which in turn reduces the insulation performance of the connecting wire.

[0021] Therefore, in view of the above-mentioned problems, the present invention discloses a connector manufacturing equipment, with reference to Figure 1-3 As shown, the extruder includes an extruder 1, a hopper 2 fixedly connected to the top of the extruder 1, a feed pipe 3 fixedly connected to the top of the hopper 2, and a barrel 4 fixedly connected to the output end of the hopper 2. The output end of the barrel 4 is equipped with a processing mechanism 5 for coating an insulating layer on the outer surface of the conductor. During the production and processing of the connecting wire, the plastic granule raw material is transported to the hopper 2 through the feed pipe 3 for temporary storage. After stable feeding, it enters the barrel 4. An extrusion screw is installed inside the barrel 4. The screw rotates at high speed under the drive of the drive device and heats, shears, and plasticizes the plastic granules, converting them into molten plastic with good processing fluidity. Through the pushing action of the screw, the molten plastic is continuously and stably transported towards the processing mechanism 5.

[0022] The processing mechanism 5 includes a die 501, which is fixedly connected to the output end of the barrel 4. A shaping tube 502 is fixedly connected to the outer wall of the die 501. The shaping tube 502 is used to shape the insulating layer covering the outer surface of the conductor to ensure the outer diameter and roundness of the insulating layer. A connecting frame 503 is provided on the side of the die 501 away from the shaping tube 502. An auxiliary component 506 is provided between the die 501 and the connecting frame 503 for buffering and heat conduction of the molten plastic.

[0023] A first positioning tube 504 is fixedly connected to the inner wall of the connecting frame 503. The first positioning tube 504 is used to initially position and guide the conductor passing through, ensuring that the conductor maintains an accurate axial position before entering the auxiliary component 506. A through hole 5041 is opened on the outer surface of the first positioning tube 504. The through hole 5041 is used to guide the heat conducted by the fins 5068 to the wire inside the first positioning tube 504, realizing efficient heat transfer and uniform distribution, and improving the heat dissipation effect of the wire during the installation process. A pressing part 5042 is provided on the side of the connecting frame 503 near the auxiliary component 506. The pressing part 5042 forms a close contact with the outer wall of the connecting rod 5067, and achieves fastening constraint through radial pressing action, reliably positioning and fixing the connecting rod 5067 in the mounting groove 5062, thereby ensuring the stability of the overall structure.

[0024] refer to Figure 3-5As shown, the auxiliary component 506 includes a core mold 5061, which is movably mounted on the outer surface of the die 501. A second positioning tube 5063 is fixedly connected to the side of the core mold 5061 near the shaping tube 502. A flow channel 505 for guiding the flow of molten plastic is formed between the die 501 and the core mold 5061. A groove 5064 is provided on the outer surface of the core mold 5061. After the molten plastic enters the flow channel 505 from the barrel 4, it flows axially toward the shaping tube 502. When the melt flows through the groove 5064 area, the increased annular gap cross-sectional area of ​​the groove 5064 can reduce the melt flow rate and pressure, thereby weakening the tendency of melt backflow and ensuring the stability of the extrusion process.

[0025] A spiral boss 5065 is fixedly connected to the outer surface of the core mold 5061 near the groove 5064. The spiral boss 5065 is used to guide the molten plastic to the end of the second positioning tube 5063 and to make the molten plastic flow circumferentially in the flow channel 505. After the molten plastic flows into the flow channel 505 from the barrel 4, it is guided by the spiral boss 5065. While being transported to the shaping tube 502, it forms a circumferential rotating flow, which can make the melt more evenly distributed circumferentially in the flow channel 505 and fill more stably, thereby improving the problem of uneven melt distribution and effectively preventing the cable insulation layer from being off-center.

[0026] Meanwhile, the spiral boss 5065 can increase the effective flow stroke of the melt and extend its residence time in the flow channel 505, which is conducive to the homogenization of the internal temperature field of the melt, reducing the internal and external temperature difference. The shearing of the melt by the spiral structure can also eliminate the temperature stratification and viscosity stratification formed during the screw extrusion process, suppress local pressure fluctuations in the flow channel, and further improve the stability of the extrusion process and the quality of cable coating molding. It is worth noting that the second positioning tube 5063 is coaxially arranged with the first positioning tube 504 to keep the conductor passing through the core mold 5061 in the center position.

[0027] A buffer groove 5066 is provided on the side of the core mold 5061 near the spiral boss 5065. The buffer groove 5066 is an annular groove used to buffer the pressure fluctuations generated during the conveying of molten plastic. Since the buffer groove 5066 is located in the middle section of the spiral boss 5065, the spiral boss 5065 is axially divided into a first spiral segment and a second spiral segment. At the same time, the volume of the buffer groove 5066 is greater than the flow volume per unit length of the spiral boss 5065, which can form a sufficient pressure buffer cavity.

[0028] As the molten plastic is conveyed through the first spiral section, the melt pressure gradually builds up. When the molten plastic enters the buffer tank 5066, the cross-sectional area of ​​the buffer tank 5066 suddenly increases, the melt flow rate decreases, and the pressure fluctuations are effectively absorbed and buffered, and the pressure distribution tends to be stable. Subsequently, the melt enters the second spiral section through the transition section to stabilize the pressure and continue to be conveyed forward. This allows the buffering and equalization of pressure fluctuations to be completed before they are transmitted to the molding area, effectively suppressing the adverse effects of pressure pulsation on the extrusion molding quality and improving the stability of the overmolding process.

[0029] When preheating of the conductor is required, refer to Figure 6-7 As shown, a mounting groove 5062 is provided on the side of the core mold 5061 away from the second positioning tube 5063. A connecting rod 5067 is movably inserted into the mounting groove 5062. Fins 5068 are provided on the outer surface of the connecting rod 5067. The height of the fins 5068 decreases sequentially along the connecting rod 5067 toward the second positioning tube 5063. The fins 5068 are used to preheat the wire before it enters the second positioning tube 5063. Since the wire is initially at room temperature, the wire can pass through three preheating zones of low temperature, medium temperature and high temperature sequentially through the axially decreasing height arrangement of the fins 5068, so as to achieve a smooth and gradient heating and avoid internal stress caused by sudden temperature changes.

[0030] Meanwhile, after the conductor is fully preheated, its surface temperature will increase significantly, which can prolong the flow and holding time of the molten plastic during the coating process. This allows the melt to fully wet and fill the gaps on the surface of the conductor and the gaps between the strands, enhancing the bonding and adhesion between the insulation layer and the conductor. A rectangular plate 5069 is fixedly connected to the side of the fin 5068 near the second positioning tube 5063. The rectangular plate 5069 can further increase the heat exchange area between the fin 5068 and the air in the conductor channel. After the core mold 5061 transfers the heat of the molten plastic in the flow channel 505 to the fin 5068, the heat continues to be conducted to the rectangular plate 5069. With the large heat dissipation surface area of ​​the rectangular plate 5069, the rectangular plate 5069 can efficiently transfer heat to the passing conductor through thermal radiation and thermal convection. Through the composite structure of the fin 5068 and the rectangular plate 5069, the heat exchange area can be maximized in a limited space, effectively improving the preheating efficiency and temperature uniformity of the conductor.

[0031] 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.

[0032] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A connecting wire production and manufacturing equipment, comprising an extruder (1), a hopper (2) is fixedly connected to the top of the extruder (1), a material pipe (3) is fixedly connected to the top of the hopper (2), and a machine barrel (4) is fixedly connected to the output end of the hopper (2), characterized in that, The output end of the barrel (4) is provided with a processing mechanism (5) for coating an insulating layer on the outer surface of the conductor. The processing mechanism (5) includes: A die (501) is fixedly connected to the output end of the barrel (4). A shaping tube (502) is fixedly connected to the outer wall of the die (501). A connecting frame (503) is provided on the side of the die (501) away from the shaping tube (502). An auxiliary component (506) for buffering and heat conduction of the molten plastic is provided between the die (501) and the connecting frame (503).

2. The connecting wire manufacturing equipment according to claim 1, characterized in that: The auxiliary component (506) includes a core mold (5061), which is movably mounted on the outer surface of the die (501). A second positioning tube (5063) is fixedly connected to the side of the core mold (5061) near the shaping tube (502).

3. The connecting wire manufacturing equipment according to claim 2, characterized in that: The core mold (5061) has an installation groove (5062) on the side away from the second positioning tube (5063). A connecting rod (5067) is movably inserted into the installation groove (5062), and fins (5068) are provided on the outer surface of the connecting rod (5067).

4. The cable manufacturing equipment according to claim 1, characterized in that: The inner wall of the connecting frame (503) is fixedly connected to a first positioning tube (504), and the outer surface of the first positioning tube (504) is provided with a through hole (5041). The connecting frame (503) is provided with a pressing part (5042) on the side near the auxiliary component (506), and the pressing part (5042) is used to press the outer surface of the connecting rod (5067) installed in the mounting groove (5062).

5. The cable manufacturing equipment according to claim 2, characterized in that: A flow channel (505) for guiding the flow of molten plastic is formed between the die (501) and the core mold (5061). A groove (5064) is provided on the outer surface of the core mold (5061). The groove (5064) is used to increase the area of ​​the annular gap where the molten plastic flows, so as to reduce the tendency of the molten plastic to flow backward.

6. The cable manufacturing equipment according to claim 2, characterized in that: A spiral boss (5065) is fixedly connected to the outer surface of the core mold (5061) near the groove (5064). The spiral boss (5065) is used to guide the molten plastic to the end of the second positioning tube (5063) and to make the molten plastic flow circumferentially in the flow channel (505).

7. The cable manufacturing equipment according to claim 2, characterized in that: The core mold (5061) has a buffer groove (5066) on the side near the spiral boss (5065). The buffer groove (5066) is an annular groove used to buffer the pressure fluctuations generated during the conveying of molten plastic.

8. The connector manufacturing equipment according to claim 3, characterized in that: The fins (5068) decrease in height along the connecting rod (5067) toward the second positioning tube (5063), and the fins (5068) are used to preheat the wires before they enter the second positioning tube (5063).

9. The connecting wire manufacturing equipment according to claim 3, characterized in that: A rectangular plate (5069) is fixedly connected to the side of the fin (5068) near the second positioning tube (5063), and the rectangular plate (5069) is used to increase the heat dissipation area.

10. The cable manufacturing equipment according to claim 2, characterized in that: The second positioning tube (5063) is coaxially arranged with the first positioning tube (504) to keep the conductor passing through it at the center of the core mold (5061).

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