Flame retardant cable extruder feed device

Abstract

This utility model provides a material guiding device for a flame-retardant cable extruder, belonging to the technical field of cable sheath production equipment. It includes a guide wheel, which comprises an axle and a flexible support mechanism sleeved on the axle. The axle is rotatably connected within the cooling water tank of the extruder. The flexible support mechanism includes a rubber wheel fixedly sleeved on the axle. By setting up the rubber wheel, the extruded sheath contacts the rubber wheel when entering the cooling water tank, providing flexible support for the soft sheath and effectively preventing deformation. This ensures a more uniform thickness of the sheath covering the cable core, thereby guaranteeing protection and insulation performance. Furthermore, by providing thickened sections located on both sides of the recessed portion, the thickened sections provide elastic support for the recessed portion and limit its deformation, further preventing excessive deformation and extending the service life of the rubber wheel.

Description

Technical Field

[0001] This utility model relates to the technical field of cable sheath production equipment, and in particular to a material guiding device for a flame-retardant cable extruder. Background Technology

[0002] The sheath of special flame-retardant cables is usually produced by an extruder. Particles made of fluoroplastic are added to the hopper of the extruder, and then extruded from the die after being heated by the extruder. During the extrusion process, the cable core passes through the extruded sheath, and the sheath wraps around the cable core. The sheath needs to be cooled after extrusion. After being extruded from the extruder, the sheath enters a cooling water tank. The flowing water in the cooling water tank cools and shapes the sheath. A guide wheel is installed in the cooling water tank. As the sheath passes through the cooling water tank, the guide wheel is used to roll and support the sheath. The guide wheel is the material guiding device of the flame-retardant cable extruder.

[0003] After the sheath of a flame-retardant cable is extruded through an extrusion die, it needs to immediately enter a cooling water tank to complete cooling and shaping. At the same time, the cable core will be inserted into the newly extruded sheath. However, the sheath has not been completely cooled and shaped when it first enters the cooling water tank and is still in a relatively soft state. At this time, the sheath, which has not been effectively cooled and shaped, will automatically press down and directly contact the guide roller on the side of the extruder in the cooling water tank under the combined action of its own weight and the weight of the cable core. Since the guide roller is usually made of a hard material, when the soft sheath comes into hard contact with the hard guide roller, it is easy to deform due to the pressure, resulting in uneven thickness of the sheath wrapped around the cable core, which affects the protection and insulation performance of the cable core. Therefore, this application provides a guide device for a flame-retardant cable extruder to meet the requirements. Utility Model Content

[0004] This utility model provides a feeding device for a flame-retardant cable extruder to solve the problem that the soft sheath is prone to deformation after contact with the hard feeding wheel, resulting in uneven thickness of the sheath wrapped around the cable core, which affects the protection and insulation performance of the cable core.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A flame-retardant cable extruder feeding device includes a feeding wheel, the feeding wheel including a wheel axle and a flexible support mechanism sleeved on the wheel axle, the wheel axle being rotatably connected in the cooling water tank of the extruder; The flexible support mechanism includes a rubber wheel fixedly sleeved on the axle, which is used to flexibly support the cable sheath extruded by the extruder.

[0006] Preferably, the rubber wheel has a cavity inside and a recess on its outer wall, and the cable sheath extruded by the extruder contacts the recess.

[0007] Preferably, a protrusion is fixed on the inner wall of the cavity near the wheel axle, and the protrusion corresponds to the recess.

[0008] Preferably, a thickened portion is fixed on the side of the inner wall of the cavity away from the wheel axle, and there are two thickened portions, with a protrusion located between the two thickened portions.

[0009] Preferably, the inner wall of the cavity is provided with an elastic support assembly, which is used for elastic support after the recessed portion is deformed.

[0010] Preferably, the elastic support assembly includes two sets of rubber support strips on the inner wall of the cavity near the wheel axle, a protrusion located between the two sets of rubber support strips, and several rubber support strips in each set. The ends of the rubber support strips are connected to the protrusions, and two rubber support rings are attached to the inner wall of the recess. The two rubber support rings are respectively fixedly sleeved on the two sets of rubber support strips, and the rubber support rings are hollow.

[0011] Preferably, the two rubber support rings have inclined support surfaces on opposite sides, which are used to support the recessed portion after it is inclined.

[0012] Preferably, a rubber connecting sleeve is fixed to the end of the rubber wheel, and the rubber connecting sleeve is fixedly sleeved on the wheel axle.

[0013] Compared with the prior art, this utility model has at least the following beneficial effects: In the above scheme, by setting up rubber wheels, the sheath comes into contact with the rubber wheels when it enters the cooling water tank after being extruded. The rubber wheels provide flexible support for the soft sheath, effectively preventing deformation of the sheath and ensuring that the thickness of the sheath wrapped on the cable core is more uniform, thereby ensuring the protective effect and insulation performance of the cable core.

[0014] By setting cavities and recesses, the sheath contacts the recessed part of the rubber wheel. The recessed part positions the sheath, ensuring that it always corresponds to the middle area of ​​the cavity and avoids displacement. After the recessed part deforms, it can effectively increase the contact area between the rubber wheel and the sheath. By expanding the contact area, the pressure applied by the sheath is evenly distributed, thereby improving the flexible support effect of the rubber wheel on the sheath and preventing the sheath from deforming due to excessive local stress.

[0015] By setting up a protrusion, when the recessed part deforms and comes into contact with the protrusion, the protrusion deforms synchronously under pressure. However, the elastic force of the protrusion acts on the recessed part to provide elastic support, limit the deformation range of the recessed part, and prevent excessive deformation of the recessed part. Furthermore, when the contact point between the recessed part and the sheath separates from the sheath, the elastic force of the protrusion acts on the recessed part to assist in the rebound of the recessed part, thereby extending the service life of the rubber wheel.

[0016] By adding thickened sections located on both sides of the recessed area, the thickened sections provide elastic support for the recessed area and limit its deformation range, further preventing excessive deformation of the recessed area and extending the service life of the rubber wheel.

[0017] By setting up an elastic support component, which consists of a rubber support strip and a rubber support ring, the rubber support strip is fixed to the inner wall of the cavity and connected to the protrusion. The rubber support strip effectively limits the excessive compression deformation of the protrusion, so that the protrusion always maintains stable elasticity. Thus, the elasticity of the protrusion acts stably during the reset process of the recess after deformation. The rubber support ring is sleeved on the rubber support strip. When the recess deforms, it drives the rubber support ring to deform synchronously. At the same time, after the recess deforms, the inner wall of the recess fits into the support surface of the rubber support ring. After fitting, the cooperation of the two support surfaces achieves stable positioning of the sheath, preventing the sheath from moving axially when passing through the recess, and ensuring stable rolling support of the rubber wheel for the sheath. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the recessed portion of this utility model; Figure 3 This is a cross-sectional view of the protruding part of this utility model; Figure 4 This is a three-dimensional structural diagram of the rubber support ring of this utility model.

[0019] In the figure: 1. Guide wheel; 2. Flexible support mechanism; 3. Wheel axle; 4. Rubber wheel; 5. Cavity; 6. Recess; 7. Protrusion; 8. Thickened part; 9. Elastic support assembly; 10. Rubber support strip; 11. Rubber support ring; 12. Support surface; 13. Rubber connecting sleeve.

[0020] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0021] The following is a detailed description of a flame-retardant cable extruder feeding device provided by this utility model, in conjunction with the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; for some known technologies, those skilled in the art can also use other alternative methods to implement the invention. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0022] like Figures 1-4 As shown, an embodiment of this utility model provides a material guiding device for a flame-retardant cable extruder, including a guide wheel 1. The guide wheel 1 includes a wheel axle 3 and a flexible support mechanism 2 sleeved on the wheel axle 3. The wheel axle 3 is rotatably connected in the cooling water tank of the extruder. The flexible support mechanism 2 includes a rubber wheel 4 fixedly sleeved on a wheel axle 3. The rubber wheel 4 is used to flexibly support the cable sheath extruded by the extruder. When the sheath passes over the rubber wheel 4, it drives the wheel axle 3 to rotate in the cooling water tank. The cooling water tank enables the rubber wheel 4 to work in tandem with the flowing water in the cooling water tank to cool and shape the sheath while supporting it. The rubber wheel 4 is made of rubber, which can adapt to the cable sheath in a soft state after extrusion. It achieves flexible support through its own elastic deformation, avoiding the compression deformation of the soft sheath caused by rigid support. This ensures that the sheath has a uniform wrapping thickness on the cable core, thereby ensuring the flame-retardant protection and insulation protection performance of the sheath for the cable core. At the same time, the flexible contact can reduce indentations on the surface of the sheath and improve the appearance quality of the sheath.

[0023] like Figures 1-3 As shown in this embodiment, the rubber wheel 4 has a cavity 5 inside and a recess 6 on its outer wall. The cable sheath extruded by the extruder contacts the recess 6. The recess 6 is arc-shaped. The cavity 5 provides deformation space for the rubber wheel 4, enhancing the elastic adaptability of the rubber wheel 4. The arc shape of the recess 6 can position the sheath, ensuring that the sheath is always in the middle area of ​​the rubber wheel 4, avoiding axial displacement of the sheath during the feeding process, and ensuring the stability of the sheath's position during cooling and shaping. In addition, when the sheath contacts the recess 6, the recess 6 will undergo elastic deformation due to the pressure of the sheath. After deformation, it can increase the contact area with the sheath, evenly distributing the pressure applied by the sheath to the surface of the recess 6, avoiding excessive local stress on the sheath and causing deformation, and further ensuring the uniformity of the sheath thickness.

[0024] like Figure 2 and Figure 3As shown in this embodiment, a protrusion 7 is fixed on the inner wall of the cavity 5 near the wheel axle 3. The protrusion 7 corresponds to the recess 6. The protrusion 7 and the recess 6 are arranged opposite to each other. When the recess 6 deforms due to the pressure of the sheath, the protrusion 7 will contact the inner wall of the deformed recess 6 and form a reverse support for the recess 6 through its own elastic deformation. This can limit the excessive deformation of the recess 6, avoid the rubber fatigue damage caused by long-term excessive stretching of the recess 6, extend the service life of the rubber wheel 4, and also... The recessed portion 6 provides stable elastic feedback, ensuring that it maintains appropriate elasticity while supporting the sheath. This guarantees the support effect of the recessed portion 6 on the sheath. During the sheath extrusion process, the rubber wheel 4 rotates. As the sheath moves, it contacts the recessed portion 6 in different areas. When the contact point between the recessed portion 6 and the sheath separates from the sheath, the elasticity of the protrusion 7 assists the recessed portion 6 in rebounding to its initial shape. This ensures that the rubber wheel 4 can continuously and stably provide support for the subsequent sheath, guaranteeing the continuity of the material feeding process.

[0025] like Figure 2 As shown in this embodiment, a thickened portion 8 is fixed on the side of the inner wall of the cavity 5 away from the wheel axle 3. There are two thickened portions 8, and a protrusion 7 is located between the two thickened portions 8. The thickened portions 8 have stronger elastic support force and are symmetrically distributed on both sides of the protrusion 7. They can form auxiliary support for the recessed portion 6 from both sides of the recessed portion 6. When the recessed portion 6 deforms, the thickened portion 8 will deform synchronously and provide lateral elastic force, further limiting the deformation range of the recessed portion 6 and preventing the recessed portion 6 from undergoing excessive deformation due to excessive force.

[0026] like Figure 2 and Figure 4 As shown in this embodiment, the inner wall of the cavity 5 is provided with an elastic support component 9. The elastic support component 9 is used for elastic support after the recessed part 6 is deformed. As a support structure inside the rubber wheel 4, the elastic support component 9 can further improve the support stability of the recessed part 6 after deformation based on the protrusion 7 and the thickened part 8.

[0027] like Figure 2 and Figure 4As shown, in this embodiment, the elastic support assembly 9 includes two sets of rubber support strips 10 on the inner wall of the cavity 5 near the wheel axle 3. A protrusion 7 is located between the two sets of rubber support strips 10. Each set of rubber support strips 10 consists of several strips. The ends of the rubber support strips 10 are connected to the protrusion 7. Two rubber support rings 11 are fitted to the inner wall of the recess 6. The two rubber support rings 11 are respectively fixedly sleeved on the two sets of rubber support strips 10. The rubber support rings 11 are hollow. The rubber support strips 10 are radially distributed along the wheel axle 3, and their ends are connected to the protrusion 7. The protrusion 7 is connected and provides elastic support for the protrusion 7. When the protrusion 7 is squeezed due to the deformation of the recess 6, the rubber support strip 10 will limit the excessive deformation of the protrusion 7 through its own elasticity, ensuring that the protrusion 7 always maintains stable elasticity and preventing the protrusion 7 from losing its support function due to excessive deformation. The hollow structure of the rubber support ring 11 can enhance the elastic deformation capability. It fits the inner wall of the recess 6 and is fixed with the rubber support strip 10. It can deform synchronously with the deformation of the recess 6, avoiding the pulling damage to the internal structure when the recess 6 deforms.

[0028] like Figure 2 As shown in this embodiment, the two rubber support rings 11 have inclined support surfaces 12 on opposite sides. The support surfaces 12 are used to support the recessed part 6 after it is tilted. The inclined support surfaces 12 can form a tight fit with the inner wall of the recessed part 6 after deformation. When the recessed part 6 deforms into the cavity 5 due to the pressure of the sheath, the tilting state of the support surfaces 12 is adapted to the deformation trajectory of the recessed part 6, so that the inner wall of the recessed part 6 can fit with the support surfaces 12 and transmit the support force through surface contact. At the same time, the support surfaces 12 of the two rubber support rings 11 are symmetrically arranged, which can form a clamping support from both sides of the inner wall of the recessed part 6, further restricting the axial movement of the sheath and ensuring that the sheath always moves along the preset trajectory during the material guiding process.

[0029] like Figure 1 and Figure 2 As shown in this embodiment, a rubber connecting sleeve 13 is fixed to the end of the rubber wheel 4. The rubber connecting sleeve 13 is fixedly sleeved on the wheel axle 3. The rubber connecting sleeve 13 can increase the contact area between the rubber wheel 4 and the wheel axle 3, prevent the connection position between the rubber wheel 4 and the wheel axle 3 from cracking due to excessive local stress, ensure that the rubber wheel 4 and the wheel axle 3 rotate synchronously, and ensure stable material guiding speed.

[0030] Working principle: When the extruder is working, the extruded cable sheath will enter the cooling water tank for cooling. The rubber wheel 4 in the flexible support mechanism 2 is made of flexible material. After the sheath enters the cooling water tank, it will contact the recessed part 6 on the outer wall of the rubber wheel 4. The rubber wheel 4 achieves flexible support for the soft sheath through its own elasticity, avoiding rigid contact that would cause the sheath to deform, so that the thickness of the sheath wrapped on the cable core is uniform, thereby ensuring the protection and insulation performance of the cable core. At the same time, the rubber wheel 4 increases its contact area with the wheel axle 3 through the rubber connecting sleeve 13, improving the connection strength between the rubber wheel 4 and the wheel axle 3, and preventing the connection position from cracking and being damaged by long-term stress. When the sheath contacts the recessed part 6, the arc-shaped recessed part 6 will play a positioning role for the sheath, ensuring that the sheath always corresponds to the middle area of ​​the internal cavity 5 of the rubber wheel 4, and preventing the sheath from shifting during the material guiding process. When the sheath contacts the recessed part 6, it will exert pressure on the recessed part 6, causing the recessed part 6 to undergo elastic deformation. The deformed recessed part 6 can increase the contact area with the sheath, evenly distributing the pressure applied by the sheath, further improving the flexible support effect of the sheath, and preventing the sheath from deforming due to excessive local stress. During the deformation of the recessed part 6, the protrusion 7 on the inner wall of the cavity 5 inside the rubber wheel 4 will come into contact with the deformed recessed part 6. The protrusion 7 will be compressed and deformed simultaneously, and its own elastic force will act on the recessed part 6, providing elastic support for the recessed part 6, limiting the deformation range of the recessed part 6, and avoiding excessive deformation that could damage the rubber wheel 4. At the same time, the two thickened parts 8 on the side of the inner wall of the cavity 5 away from the wheel axle 3 will provide further elastic support from both sides of the recessed part 6, helping to limit the deformation range of the recessed part 6 and extending the service life of the rubber wheel 4. When the contact point between the recessed part 6 and the sheath separates from the sheath, the elasticity of the protrusion 7 and the thickened part 8 will assist the recessed part 6 to rebound, so that the rubber wheel 4 returns to its initial shape. Two sets of rubber support strips 10 are fixed on the side of the cavity 5 near the wheel axle 3, and their ends are connected to the protrusion 7. This effectively limits the excessive deformation of the protrusion 7 under pressure, ensuring that the protrusion 7 always maintains stable elasticity and that its support and rebound effect on the recess 6 is stable. Two rubber support rings 11 are respectively fixedly sleeved on the two sets of rubber support strips 10. The outer wall of the rubber support ring 11 is in contact with the inner wall of the recess 6. When the recess 6 deforms, it will not pull on the recess 6. At the same time, the recess 6 will drive the rubber support ring 11 to deform synchronously. After deformation, the inner wall of the recess 6 is in contact with the support surface 12 on the side of the rubber support ring 11. The cooperation of the two support surfaces 12 further ensures that the sheath will not move axially during the material guiding process, ensuring the stability of the rolling support of the rubber wheel 4 on the sheath, and ultimately ensuring the production quality of the flame-retardant cable sheath.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A flame retardant cable extruder feed guide characterized by, Includes a guide wheel (1), the guide wheel (1) includes a wheel axle (3) and a flexible support mechanism (2) sleeved on the wheel axle (3), the wheel axle (3) is rotatably connected in the cooling water tank of the extruder; The flexible support mechanism (2) includes a rubber wheel (4) fixedly sleeved on the axle (3), and the rubber wheel (4) is used to flexibly support the cable sheath extruded by the extruder.

2. The flame -retardant cable extruder feed guide of claim 1, wherein, The rubber wheel (4) has a cavity (5) inside and a recess (6) on the outer wall of the rubber wheel (4). The cable sheath extruded by the extruder contacts the recess (6).

3. The flame -retardant cable extruder feed guide of claim 2, wherein, The cavity (5) has a protrusion (7) fixed on the side of the inner wall near the wheel axle (3), and the protrusion (7) corresponds to the recess (6).

4. The material guiding device for a flame-retardant cable extruder according to claim 2, characterized in that, The inner wall of the cavity (5) is fixed with a thickened part (8) on the side away from the wheel axle (3). There are two thickened parts (8), and the protrusion (7) is located between the two thickened parts (8).

5. The material guiding device for a flame-retardant cable extruder according to claim 4, characterized in that, The inner wall of the cavity (5) is provided with an elastic support component (9), which is used for elastic support after the deformation of the recess (6).

6. The material guiding device for a flame-retardant cable extruder according to claim 5, characterized in that, The elastic support assembly (9) includes two sets of rubber support strips (10) on the inner wall of the cavity (5) near the wheel axle (3), and a protrusion (7) located between the two sets of rubber support strips (10). Each set of rubber support strips (10) consists of several pieces. The ends of the rubber support strips (10) are connected to the protrusions (7). The inner wall of the recess (6) is fitted with two rubber support rings (11). The two rubber support rings (11) are fixedly sleeved on the two sets of rubber support strips (10) respectively. The rubber support rings (11) are hollow.

7. The flame-retardant cable extruder feeding device according to claim 6, characterized in that, The two rubber support rings (11) have inclined support surfaces (12) on opposite sides, which are used to support the recess (6) after it is inclined.

8. The material guiding device for a flame-retardant cable extruder according to claim 1, characterized in that, The end of the rubber wheel (4) is fixed with a rubber connecting sleeve (13), which is fixedly sleeved on the wheel axle (3).

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