Extrusion equipment for power cable protection sleeve

Abstract

The invention relates to the technical field of extrusion equipment, and discloses power cable protection sleeve extrusion equipment which comprises a support mechanism, the support mechanism comprises a fixed body and a rotating part, one end of the fixed body is fixedly connected with the wall face of a core rod body in a clamped mode, and the other end of the fixed body is attached to the interior of a first mold body; a rotating piece is arranged on the fixed body in a deviated mode, and the section of the rotating piece is in a water drop shape with the rear middle and the two thin ends. The structural design of the support mechanism is effectively optimized, the support mechanism is composed of the fixed body and the rotating piece, the rotating piece with the thick middle and the two thin ends is obliquely arranged on the fixed body, when the melt moves, the melt is affected by the rotating piece and has deflection force, and therefore the melt obliquely moves in an annular gap formed by the first die body and the core rod body, and the melt is prevented from being broken. Therefore, the full fusion effect of the melt is improved, and the confluence line is prevented from being obvious to influence the production quality.

Description

Technical Field

[0001] This application relates to the field of extrusion equipment technology, and in particular to an extrusion equipment for power cable protective sleeves. Background Art

[0002] The new energy industry refers to an industrial system centered on renewable energy (such as solar, wind, hydro, biomass, and geothermal energy) and clean energy technologies. Its aim is to reduce dependence on traditional fossil fuels, lower carbon emissions, and promote sustainable development. The new energy industry encompasses power generation, energy storage technology, and smart grids. Smart grids are an upgraded version of traditional power grids, achieving efficient power dispatch, distributed energy management, and user-side interaction through technologies such as digitalization, automation, and the Internet of Things. The construction of smart grids requires high-performance power cables, which are the core carriers for transmitting electrical energy. To protect these power cables, protective sleeves must be installed during installation.

[0003] In the manufacturing process of protective sleeves, extrusion equipment is a crucial piece of machinery for forming the sleeves. It achieves continuous production of protective sleeves through processes such as plasticizing, forming, shaping, cooling, traction, and cutting. The extrusion die (also known as the die head) is the core component of the extrusion equipment, directly affecting the dimensional accuracy, surface quality, and mechanical properties of the sleeve. It mainly includes a mandrel, die, support, and heating and temperature control system. During operation, molten plastic enters the die head from the extruder and is extruded through the annular gap formed by the mandrel and die to form the sleeve.

[0004] However, existing extrusion equipment still has some defects in use: In the extrusion die head, the support is set between the core die and the orifice die. It can fix the core die in the high-pressure melt environment, prevent the core die from shifting or vibrating, and ensure the stability of the inner diameter of the sleeve. However, the setting of the support can prolong the melt fusion time, which makes the melt unable to fully fuse, resulting in obvious fusion line, which reduces the longitudinal strength of the sleeve and affects the quality of the sleeve. Summary of the Invention

[0005] This application proposes an extrusion device for power cable protective sleeves, which has the advantages of optimized support mechanism design and prevention of obvious merging lines, thereby solving the problem of sleeve production quality being affected by obvious merging lines.

[0006] To achieve the above objectives, this application adopts the following technical solution: an extrusion device for power cable protective sleeves, comprising: The first mold body and the mandrel body are movably connected inside the first mold body; The support mechanism includes a fixed body and a rotating component. One end of the fixed body is fixedly engaged with the wall of the mandrel body, and the other end of the fixed body is fitted with the interior of the first mold body. The rotating component is biasedly arranged on the fixed body, and the rotating component has a teardrop shape with a cross-sectional shape that is thinner in the middle and thinner at both ends. The structural design of the support mechanism is optimized so that after the melt passes through the support mechanism, the melt is affected by the rotating parts and has a bias force, thus moving obliquely in the annular gap formed by the first mold body and the mandrel body.

[0007] Furthermore, the first mold body is a component of the die-making mechanism, and the die-making mechanism further includes: The second mold body is provided in which the rear inner wall of the first mold body is movably connected to the front outer wall of the second mold body, and the first mold body and the second mold body are fixedly connected by bolts. The sizing sleeve has a rear end that contacts the front end of the second mold body, and the second mold body and the sizing sleeve body are fixedly connected by bolts. A flow divider plate is fixedly connected to the front end of the first mold body.

[0008] Furthermore, the front section of the mandrel is conical, while the middle and rear sections are cylindrical.

[0009] Furthermore, the mandrel body is a component of the core mold mechanism, and the core mold mechanism further includes: A limiting tube is fixedly connected to the rear inner side of the mandrel body; A limiting rod is provided inside the limiting tube, and one end of the limiting rod is fixedly connected to the front side of the inside of the core rod body, and the other end of the limiting rod is fixedly connected to the rear side of the inside of the core rod body. The movable component is movably sleeved with the outside of the limiting rod, one end of the movable component is movably sleeved inside the limiting tube, and the movable component is connected to the core rod body by a spring. A mixing plate, with several mixing plates fixedly connected to a movable part located outside the limiting tube; A connecting pipe is disposed inside the mandrel body, and one end of the connecting pipe is fixedly connected to the inside of the limiting pipe.

[0010] Furthermore, the movable component is composed of a first rod, a second rod, and a third rod. The front section of the first rod is fixedly connected to the second rod and the third rod, respectively, and the second rod is located behind the third rod. When the movable component moves completely forward, the second rod corresponds to the position of the support mechanism, and the outer ring of the second rod has N-type magnetism, while the inner ring of the second rod has S-type magnetism. When the movable component moves completely backward, the third rod corresponds to the position of the support mechanism, and the outer ring of the third rod has S-type magnetism, while the inner ring of the third rod has N-type magnetism.

[0011] Furthermore, the number of the support mechanisms is greater than three, and the support mechanisms are evenly arranged around the mandrel body. The support mechanisms are divided into connecting supports, conveying supports, and auxiliary supports. There are three conveying supports. The first conveying support is connected to the mandrel body and is used to fill the mandrel body with heat transfer oil. The second conveying support is connected to the mandrel body and is used to discharge heat transfer oil from the mandrel body. The third conveying support is connected to the other end of the connecting pipe and is used to realize the oil suction and discharge of the limiting pipe.

[0012] Furthermore, the support mechanism also includes: For the connecting bracket, the wall of the first mold body is provided with a threaded hole, and the end of the fixing body that fits against the inner wall of the first mold body is provided with a threaded groove. The fixing screw passes through the threaded hole of the first mold body and is connected to the threaded groove of the fixing body. For the conveying bracket, the fixed tube has a conveying hole inside the fixed body and is fixedly sleeved in the conveying hole of the fixed body.

[0013] By modifying the core mold mechanism, which consists of a core rod, a limiting tube, a limiting rod, a moving part, a mixing plate, and a connecting tube, and dividing the support mechanism into a connecting support, a conveying support, and an auxiliary support, with three conveying supports, one conveying support fills the core rod with heat transfer oil during operation, while another conveying support discharges heat transfer oil from the core rod to quickly remove heat from the core rod and prevent the melt from overheating and adhering to the core rod, thus affecting the sleeve forming. The third conveying support is connected to the limiting tube through the connecting tube to drive the moving part to move horizontally along the limiting rod and move the mixing plate synchronously, thereby effectively stirring the heat transfer oil in the core rod and preventing uneven temperature in the core rod from affecting production quality.

[0014] Furthermore, the inner ring of the rotating component has two steering grooves, and the two steering grooves are evenly arranged around the fixed body. The steering grooves are spirally arranged, and the number of turns of the steering grooves is one-quarter turn.

[0015] Furthermore, the support mechanism also includes: The movable component has a fixing cavity inside the fixing body and a fixing hole on the wall of the fixing body. The fixing body is movably engaged with the movable component through the fixing cavity and the fixing hole.

[0016] Furthermore, the movable component includes: The movable ring is movably fitted into the fixed cavity of the fixed body. The movable ring is magnetic, with the end of the movable ring closer to the moving part having N-type magnetism and the end of the movable ring farther from the moving part having S-type magnetism. The movable block is movably engaged in the fixing hole of the fixed body, and one end of the movable block is fixedly connected to the side wall of the movable ring, while the other end of the movable block is movably engaged in the steering groove of the rotating part. There are two movable blocks, and the two movable blocks are symmetrically arranged.

[0017] By assembling a moving component consisting of a first rod, a second rod, and a third rod, the relative position between the moving component and the support mechanism can be changed when the moving component moves horizontally. This allows the second and third rods to alternately approach the support mechanism, thereby providing different magnetic forces to the support mechanism. The moving component is movably sleeved within the fixed body, and the moving component consists of a movable ring and a movable block. The inner ring of the rotating component has two steering grooves, and the movable block is movably engaged in the steering grooves. When the moving component moves vertically under magnetic force, it effectively pushes the rotating component to rotate along the fixed body, thereby changing the deflection direction of the melt and thus changing the movement direction of the melt. This allows the melt to move from different directions, fully flushing all positions of the annular gap formed by the first mold body and the mandrel body, preventing the melt from moving along the same path, which would cause impurities in the melt to easily remain or even accumulate in the same position, affecting the molding quality.

[0018] The beneficial effects of this invention are as follows: This application provides an extrusion device for power cable protective sleeves. By setting several support mechanisms between the first die and the mandrel body, and the several support mechanisms being evenly arranged around the axis of the mandrel body, the structural design of the support mechanisms is effectively optimized. The support mechanisms consist of a fixed body and rotating parts, and the rotating parts, which are thick in the middle and thin at both ends, are biased towards the fixed body. When the melt moves, the melt is affected by the rotating parts and has a biasing force, thereby moving obliquely in the annular gap formed by the first die and the mandrel body, thereby improving the full fusion effect of the melt and preventing obvious merging lines from affecting production quality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a three-dimensional structural diagram of the die mechanism in this invention, located in cross-section. Figure 3 This is a cross-sectional three-dimensional structural diagram of the entire invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a cross-sectional three-dimensional structural diagram of the die mechanism in this invention; Figure 6 This is a three-dimensional structural diagram of the core mold mechanism and the support mechanism in this invention; Figure 7 This is a three-dimensional structural diagram of the core mold mechanism and support mechanism located in the cross-section of the core rod body in this invention; Figure 8 This is a three-dimensional structural diagram of the support mechanism in this invention; Figure 9 This is a cross-sectional three-dimensional structural diagram of the auxiliary support in this invention; Figure 10 This is a cross-sectional three-dimensional structural diagram of the connecting pipe and the conveying support in this invention; Figure 11 This is a three-dimensional structural diagram of the disassembled state of the delivery bracket in this invention.

[0020] In the diagram: 1. Die-making mechanism; 11. First die body; 12. Second die body; 13. Sizing sleeve; 14. Diverter plate; 2. Core die mechanism; 21. Core rod body; 22. Limiting tube; 23. Limiting rod; 24. Moving part; 241. First rod; 242. Second rod; 243. Third rod; 25. Mixing plate; 3. Connecting pipe; 4. Support mechanism; 4a. Connecting support; 4b. Conveying support; 4c. Auxiliary support; 41. Fixed body; 42. Fixed screw; 43. Fixed tube; 5. Rotating part; 6. Moving part; 61. Moving ring; 62. Moving block. Detailed Implementation

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: An extrusion device for power cable protective sleeves, comprising a first die 11, as shown below. Figures 2-5The rear inner wall of the first mold 11 is movably sleeved with the front outer wall of the second mold 12, and the first mold 11 and the second mold 12 are fixedly connected by bolts. The second mold 12, with the cooperation of the mandrel 21, first compresses the melt and then shapes it. The rear end of the second mold 12 contacts the front end of the sizing sleeve 13, and the second mold 12 and the sizing sleeve 13 are fixedly connected by bolts. The sizing sleeve 13 is equipped with a cooling device inside, thereby enabling precise control of the outer diameter and roundness of the sleeve, ensuring that the product meets standard requirements. A flow divider 14 is fixedly connected to the front end of the first mold 11. The flow divider 14 mainly undertakes the functions of melt distribution, impurity filtering, and pressure stabilization. Thus, as... Figure 1 and Figure 5 The first mold body 11, the second mold body 12, the sizing sleeve body 13 and the flow divider plate 14 constitute the die mechanism 1.

[0023] like Figures 2-3 The first mold 11 has a mandrel 21 movably fitted inside. The front section of the mandrel 21 is conical, and the middle and rear sections are cylindrical. The annular gap formed between the front end of the first mold 11 and the front end of the mandrel 21 is a flow-diverting zone. The space formed therein allows the melt that has just entered the first mold 11 to be evenly dispersed, avoiding stagnation and degradation. The annular gap formed between the front section of the second mold 12 and the middle section of the mandrel 21 is a compression zone, which can effectively compress the melt, making the melt dense and free of bubbles. The annular gap formed between the rear section of the second mold 12 and the rear section of the mandrel 21 is a forming zone, which allows the melt to be extruded and formed into a tubular shape.

[0024] like Figure 2 , Figures 6-8 The number of support mechanisms 4 is greater than three, and the support mechanisms 4 are evenly arranged around the mandrel body 21 to fix and support the mandrel body 21, prevent the mandrel body 21 from shifting or vibrating, and ensure the stability of the inner diameter of the sleeve. The support mechanism 4 includes a fixed body 41 and a rotating part 5, such as... Figures 3-4 One end of the fixing body 41 is fixedly engaged with the wall of the core rod body 21, and the other end of the fixing body 41 is fitted with the interior of the first mold body 11. A rotating part 5 is biasedly arranged on the fixing body 41, and the rotating part 5 has a teardrop shape with a cross-sectional shape that is thin in the middle and thin at both ends.

[0025] The structural design of the support mechanism 4 is optimized. After the melt passes through the support mechanism 4, the melt is affected by the rotating part 5 and has a bias force, so it moves obliquely in the annular gap formed by the first mold body 11 and the mandrel body 21. This effectively improves the full fusion effect of the melt and prevents the obvious fusion line from affecting the production quality. It does not require reducing the fixed body 41, which would reduce the stability of the mandrel body 21, nor does it require extending the die mechanism 1 and the core mold mechanism 2, which would increase the cost.

[0026] In Example 2, based on Example 1, the mandrel body 21 is a component of the core mold mechanism 2, and the core mold mechanism 2 also includes a limiting tube 22, a limiting rod 23, a moving part 24, a mixing plate 25, and a connecting tube 3, as follows: Figures 3-4 , Figures 6-7 A limiting tube 22 is fixedly connected to the rear side of the inner side of the mandrel body 21. A limiting rod 23 is provided inside the limiting tube 22, with one end of the limiting rod 23 fixedly connected to the front side of the inner side of the mandrel body 21 and the other end of the limiting rod 23 fixedly connected to the rear side of the inner side of the mandrel body 21. The interior of the moving part 24 is movably sleeved with the exterior of the limiting rod 23. The limiting rod 23 can effectively support and limit the moving part 24, allowing the moving part 24 to move horizontally along the limiting rod 23. One end of the moving part 24 is movably sleeved inside the limiting tube 22, and the moving part 24 is connected to the mandrel body 21 by a spring. Several mixing plates 25 are fixedly connected to the moving part 24 located outside the limiting tube 22. The moving part 24 drives the mixing plates 25 along the limiting rod. 23 moves horizontally to stir the heat transfer oil inside the mandrel body 21. The connecting pipe 3 is located inside the mandrel body 21, and one end of the connecting pipe 3 is fixedly connected to the inside of the limiting pipe 22. When oil is filled into the limiting pipe 22 through the connecting pipe 3, as the oil increases, it can overcome the spring tension and push the moving part 24 forward. When the oil is discharged from the limiting pipe 22 through the connecting pipe 3, as the oil decreases, the spring tension can pull the moving part 24 backward. Thus, the connecting pipe 3 repeatedly sucks and discharges oil during operation to drive the moving part 24 to move back and forth, and drives the mixing plate 25 to move synchronously. This can achieve effective stirring of the heat transfer oil inside the mandrel body 21 and prevent uneven temperature inside the mandrel body 21 from affecting production quality.

[0027] like Figures 6-8The support mechanism 4 is divided into a connecting support 4a, a conveying support 4b, and an auxiliary support 4c. Taking six support mechanisms 4 as an example, there is one connecting support 4a, which is the main component for stabilizing and fixing the mandrel 21 and the first mold body 11, and can provide strong support. There are three conveying supports 4b. The three conveying supports 4b not only have a supporting effect, but also provide heat transfer oil to the mandrel 21 and oil to the limiting tube 22. Specifically, the first conveying support 4b is connected to the mandrel 21 and is used to fill the mandrel 21 with heat transfer oil. The second conveying support 4b is connected to the mandrel 21 and is used to draw heat transfer oil from the mandrel 21. The mandrel 21 discharges heat transfer oil, and the flow of heat transfer oil in the mandrel 21 quickly removes the heat from the mandrel 21, preventing the melt from overheating and adhering to the mandrel 21, thus affecting the sleeve forming. The third conveying bracket 4b is connected to the other end of the connecting pipe 3 and is used to realize the oil suction and discharge of the limiting pipe 22, thereby providing power for the horizontal movement of the driving moving part 24. There are two auxiliary brackets 4c. The two auxiliary brackets 4c can work with one connecting bracket 4a and three conveying brackets 4b to circumferentially and stably support the mandrel 21. In addition, according to actual needs, the auxiliary brackets 4c can be replaced with connecting brackets 4a to further enhance the stability of the mandrel 21.

[0028] like Figures 8-9 For the connecting bracket 4a, the conveying bracket 4b and the auxiliary bracket 4c, each includes a fixed body 41 and a rotating part 5 to stably set the mandrel body 21 within the first mold body 11.

[0029] like Figure 3 -and 4, Figure 8 For the connecting bracket 4a, the wall of the first mold body 11 is provided with a threaded hole, and the end of the fixing body 41 that fits against the inner wall of the first mold body 11 is provided with a threaded groove. The fixing screw 42 passes through the threaded hole of the first mold body 11 and is connected to the threaded groove of the fixing body 41. The fixing screw 42 is used to connect the first mold body 11 and the core rod 21 to achieve a stable connection of the core rod 21 in the first mold body 11. The fixing screw 42 is easy to install and remove.

[0030] like Figure 3 -and 4, Figures 8-11 For the conveying bracket 4b, the inside of the fixed body 41 is provided with a conveying hole, and the fixed tube 43 is fixedly sleeved in the conveying hole of the fixed body 41. One end of the fixed tube 43 passes through the first mold body 11 and is connected to the pump body. The pump body can be used to realize the suction and discharge of liquid in the fixed tube 43. In addition, the other end of two of the fixed tubes 43 is connected to the inside of the core rod body 21 to realize the suction and discharge of heat transfer oil in the core rod body 21. The other end of the last fixed tube 43 is connected to the inside of the connecting tube 3 to realize the suction and discharge of oil in the limiting tube 22, thereby realizing different functions.

[0031] Example 3, based on Example 2, such as Figure 3 -and 4, Figure 7 The movable component 24 is composed of a first rod 241, a second rod 242, and a third rod 243. The front section of the first rod 241 is fixedly engaged with the second rod 242 and the third rod 243 respectively, and the second rod 242 is located behind the third rod 243. When the movable component 24 moves forward completely, the second rod 242 corresponds to the position of the support mechanism 4, and the outer ring of the second rod 242 has N-type magnetism, while the inner ring of the second rod 242 has S-type magnetism. When the movable component 24 moves backward completely, the third rod 243 corresponds to the position of the support mechanism 4, and the outer ring of the third rod 243 has S-type magnetism, while the inner ring of the third rod 243 has N-type magnetism. Since the second rod 242 and the third rod 243 apply different magnetic forces to the support mechanism 4, the movement of the movable component 24 can alternately change the effect on the support mechanism 4, thereby providing power to push the rotating component 5 to change its deflection angle.

[0032] like Figure 11 The inner ring of the rotating component 5 has two steering grooves, and the two steering grooves are evenly arranged around the fixed body 41. The steering grooves are spirally arranged, and the number of turns of the steering grooves is one-quarter turn. The steering grooves of the rotating component 5 can provide conditions for changing the deflection angle of the rotating component 5.

[0033] like Figure 3 - In addition to 4, the support mechanism 4 also includes a movable component 6. The fixed body 41 has a fixed cavity inside and a fixed hole on its wall. The fixed body 41 is movably engaged with the movable component 6 through the fixed cavity and the fixed hole, used to change the deflection angle of the rotating component 5. The movable component 6 includes a movable ring 61 and a movable block 62, such as... Figure 11The movable ring 61 is movably sleeved within the fixed cavity of the fixed body 41. The movable ring 61 is magnetic, with one end near the moving member 24 exhibiting N-type magnetism and the other end away from the moving member 24 exhibiting S-type magnetism. Thus, when the second rod 242 moves to a position corresponding to the support mechanism 4, the second rod 242 applies a magnetic repulsive force to the movable ring 61, pushing the movable ring 61 away from the moving member 24. When the third rod 243 moves to a position corresponding to the support mechanism 4, the third rod 243 applies a magnetic attraction force to the movable ring 61, pushing the movable ring 61 closer to the moving member 24. The movable block 62 is movably engaged within the fixed hole of the fixed body 41, and one end of the movable block 62 is... The side wall of the movable ring 61 is fixedly connected, and the other end of the movable block 62 is movably engaged with the turning groove of the rotating part 5. There are two movable blocks 62, and the two movable blocks 62 are symmetrically arranged. In use, since the rotating part 5 is sleeved on the fixed body 41 and restricted by the first mold body 11 and the mandrel body 21, when the movable block 62 moves vertically, the rotating part 5 can change its deflection direction under the action of its turning groove, thereby changing the movement direction of the melt and pushing the melt to move from different directions. This fully flushes the various positions of the annular gap formed by the first mold body 11 and the mandrel body 21, preventing the melt from always moving along the same path, which would cause impurities in the melt to easily remain or even accumulate in the same position, affecting the molding quality.

[0034] The working principle of the method of using this invention is as follows: When the extrusion equipment is working, the melt enters the die mechanism 1 under the action of thrust, and is extruded into a sleeve under the cooperation of the die mechanism 1 and the core mold mechanism 2. During this process, since the rotating part 5 is biased on the fixed body 41 and the rotating part 5 is thick in the middle and thin at both ends, the melt has a biased force when passing through the support mechanism 4 due to the influence of the rotating part 5. As a result, it moves obliquely in the annular gap formed by the first die body 11 and the core rod body 21, thereby improving the full fusion effect of the melt and preventing the obvious fusion line from affecting the production quality.

[0035] During operation, the two conveying supports 4b work intermittently and open and close synchronously. When the two conveying supports 4b are working, one conveying support 4b fills the mandrel body 21 with heat-conducting oil, while the other conveying support 4b extracts heat-conducting oil from the mandrel body 21. This quickly removes the heat from the mandrel body 21, preventing the melt from overheating and adhering to the mandrel body 21, thus affecting the forming of the sleeve. At the same time, the remaining conveying support 4b performs a reciprocating suction operation, and the two operations are performed at the same time. This causes the limiting tube 22 to be intermittently filled with and drained with oil, thereby driving the moving part 24 to move horizontally along the limiting rod 23 and driving the mixing plate 25 to move synchronously. This effectively stirs the heat-conducting oil in the mandrel body 21, preventing uneven temperature in the mandrel body 21 from affecting the forming quality of the sleeve.

[0036] During the reciprocating movement of the moving part 24, the horizontal movement of the moving part 24 can change the relative position between the moving part 24 and the support mechanism 4. That is, the second rod 242 and the third rod 243 will alternately approach the support mechanism 4, thereby providing different magnetic forces to the movable ring 61 to change the position of the movable ring 61 within the fixed body 41. Furthermore, because the movable block 62 is engaged with the turning groove of the rotating part 5, the rotating part 5 is effectively pushed to rotate along the axis of the fixed body 41, thereby changing the deflection direction of the melt and intermittently changing the movement direction of the melt. This allows the melt to move from different directions, fully flushing the various positions of the annular gap formed by the first mold body 11 and the core rod body 21, preventing the melt from moving along the same path and causing impurities in the melt to easily remain or even accumulate in the same position, affecting the molding quality.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An extrusion device for power cable protective sleeves, characterized in that, include: The first mold (11) and the core rod (21) are movably connected inside the first mold (11). The support mechanism (4) includes a fixed body (41) and a rotating part (5). One end of the fixed body (41) is fixedly engaged with the wall of the core rod body (21), and the other end of the fixed body (41) is attached to the interior of the first mold body (11). The rotating part (5) is biasedly arranged on the fixed body (41), and the rotating part (5) has a teardrop shape with a middle section and thin ends. The structural design of the support mechanism (4) is optimized. After the melt passes through the support mechanism (4), the melt is affected by the rotating part (5) and has a bias force, so that it moves obliquely in the annular gap formed by the first mold body (11) and the mandrel body (21).

2. The extrusion equipment for power cable protective sleeves according to claim 1, characterized in that, The first mold body (11) is a component of the die-making mechanism (1), and the die-making mechanism (1) further includes: The second mold (12) has its rear inner wall of the first mold (11) movably connected to its front outer wall, and the first mold (11) and the second mold (12) are fixedly connected by bolts. The sizing sleeve (13) has its rear end in contact with the front end of the second mold (12), and the second mold (12) and the sizing sleeve (13) are fixedly connected by bolts. Diverter plate (14), the front end of the first module (11) is fixedly connected to the diverter plate (14).

3. The extrusion equipment for power cable protective sleeves according to claim 2, characterized in that, The front section of the mandrel (21) is conical, and the middle and rear sections are cylindrical.

4. The extrusion equipment for power cable protective sleeves according to claim 3, characterized in that, The mandrel body (21) is a component of the mandrel mechanism (2), and the mandrel mechanism (2) further includes: Limiting tube (22), the inner rear side of the core rod body (21) is fixedly connected to the limiting tube (22); Limiting rod (23): The limiting tube (22) is provided with a limiting rod (23), and one end of the limiting rod (23) is fixedly connected to the front side of the inside of the core rod body (21), and the other end of the limiting rod (23) is fixedly connected to the rear side of the inside of the core rod body (21). The movable part (24) is movably sleeved with the outside of the limiting rod (23), one end of the movable part (24) is movably sleeved inside the limiting tube (22), and the movable part (24) is connected to the core rod (21) by a spring. A number of mixing plates (25) are fixedly connected to a movable part (24) located outside the limiting tube (22); A connecting pipe (3) is disposed inside the core rod body (21), and one end of the connecting pipe (3) is fixedly connected to the inside of the limiting pipe (22).

5. The extrusion equipment for power cable protective sleeves according to claim 4, characterized in that, The movable component (24) is composed of a first rod (241), a second rod (242) and a third rod (243). The front section of the first rod (241) is fixedly connected to the second rod (242) and the third rod (243) respectively. The second rod (242) is located behind the third rod (243). When the movable component (24) moves forward completely, the second rod (242) corresponds to the position of the support mechanism (4). The outer ring of the second rod (242) has N-type magnetism, and the inner ring of the second rod (242) has S-type magnetism. When the movable component (24) moves backward completely, the third rod (243) corresponds to the position of the support mechanism (4). The outer ring of the third rod (243) has S-type magnetism, and the inner ring of the third rod (243) has N-type magnetism.

6. The extrusion equipment for power cable protective sleeves according to claim 5, characterized in that, The number of the support mechanism (4) is greater than three, and the support mechanism (4) is evenly arranged around the core rod body (21). The support mechanism (4) is divided into a connecting support (4a), a conveying support (4b) and an auxiliary support (4c). The number of the conveying support (4b) is three. The first conveying support (4b) is connected to the core rod body (21) and is used to fill the core rod body (21) with heat transfer oil. The second conveying support (4b) is connected to the core rod body (21) and is used to discharge heat transfer oil from the core rod body (21). The third conveying support (4b) is connected to the other end of the connecting pipe (3) and is used to realize the oil suction and discharge of the limiting pipe (22).

7. The extrusion equipment for power cable protective sleeves according to claim 6, characterized in that, The support mechanism (4) further includes: For the connecting bracket (4a), the wall of the first mold (11) is provided with a threaded hole, and the end of the fixing body (41) which is in contact with the inner wall of the first mold (11) is provided with a threaded groove. The fixing screw (42) passes through the threaded hole of the first mold (11) and is connected to the threaded groove of the fixing body (41). For the conveying bracket (4b), the fixed tube (43) is provided with a conveying hole inside the fixed body (41), and the fixed tube (43) is fixedly sleeved in the conveying hole of the fixed body (41).

8. The extrusion equipment for power cable protective sleeves according to claim 7, characterized in that, The inner ring of the rotating part (5) has two turning grooves, and the two turning grooves are evenly arranged around the fixed body (41). The turning grooves are spirally arranged, and the number of turns of the turning grooves is one-quarter turn.

9. The extrusion equipment for power cable protective sleeves according to claim 8, characterized in that, The support mechanism (4) further includes: The movable part (6) has a fixed cavity inside the fixed body (41) and a fixed hole on the wall of the fixed body (41). The fixed body (41) is movably engaged with the movable part (6) through the fixed cavity and the fixed hole.

10. The extrusion equipment for power cable protective sleeves according to claim 9, characterized in that, The movable component (6) includes: The movable ring (61) is movably sleeved in the fixed cavity of the fixed body (41). The movable ring (61) is magnetic, and the end of the movable ring (61) closer to the moving part (24) is N-type magnetism, and the end of the movable ring (61) further away from the moving part (24) is S-type magnetism. The movable block (62) is movably engaged in the fixing hole of the fixed body (41), and one end of the movable block (62) is fixedly connected to the side wall of the movable ring (61), and the other end of the movable block (62) is movably engaged in the turning groove of the rotating part (5). There are two movable blocks (62), and the two movable blocks (62) are symmetrically arranged.

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