A pipe mouth hot melting flaring device for HDPE silicon core pipe

Abstract

The present application relates to the technical field of HDPE silicon core pipe flaring, and particularly relates to a pipe mouth hot melting flaring device for HDPE silicon core pipe, which comprises a rack, a flaring mechanism and a clamping mechanism, the flaring mechanism comprises a double-layer flaring assembly and a translation assembly, the double-layer flaring assembly comprises a flaring cone cylinder, a heating core cylinder which is in sliding fit with the inner wall of the flaring cone cylinder, and a driving piece which drives the heating core cylinder to move along the axis of the heating core cylinder. The double-layer flaring mechanism is formed by the heating core cylinder and the flaring cone cylinder, the heating core cylinder and the flaring cone cylinder can move relatively, the heat is transferred when flaring, and the heating core cylinder and the flaring cone cylinder are separated and heat-insulated when cooling, so that heat management and structure decoupling are realized, the rapid cooling of the flaring cone cylinder and the constant temperature maintenance of the heating core cylinder are ensured, the deformation and cracking problems of the traditional integral flaring head caused by repeated thermal expansion and cold shrinkage are effectively avoided, and the energy consumption during cooling and heating is reduced, compared with the prior art, the structure characteristics and flaring process requirements of the HDPE silicon core pipe can be better adapted.

Description

Technical Field

[0001] This invention relates to the field of HDPE silicon core tube flaring technology, and particularly to a tube end hot-melt flaring device for HDPE silicon core tubes. Background Technology

[0002] HDPE silicon core pipe is a new type of composite pipe with a silicone solid lubricant on its inner wall, and it is widely used in optical cable communication network systems. In order to process the pipe ends into smooth sockets for splicing, the pipe ends of HDPE silicon core pipe need to be flared.

[0003] Currently, HDPE silicon core tubes are mostly flared using an integral flaring head with a higher temperature. Since the silicon core tube is a small-diameter, thin-walled structure, the processing precision requirements are higher than those of conventional HDPE tubes. However, in the existing technology, the heating and cooling of the integral flaring head are completed on the same substrate. The flaring head needs to undergo a "heating-cooling" hot and cold cycle. Repeated thermal expansion and contraction can easily cause deformation, cracking, and surface oxidation of the flaring head, resulting in a decrease in molding precision.

[0004] In addition, the temperature fluctuations before and after the flaring process are large, which cannot meet the low-temperature constant temperature requirements of silicon core tubes. Furthermore, the entire flaring head needs to be heated before flaring and cooled during the pressure holding and cooling process after flaring. The repeated heating and cooling processes result in high energy consumption and also increase the overall operation time, affecting the flaring efficiency. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a pipe end hot-melt flaring device for HDPE silicon core pipes to solve the technical problems existing in the prior art, including a frame on which a flaring mechanism and a clamping mechanism for fixing the pipe are installed.

[0006] The flaring mechanism includes a double-layer flaring assembly and a translation component that drives the double-layer flaring assembly to move horizontally.

[0007] The double-layer flaring assembly includes a flaring cone, a heating core that slides against the inner wall of the flaring cone, and a driving component that drives the heating core to move along its axis. The flaring cone has a water-cooling channel inside.

[0008] During the hot-melt flaring process of the pipe opening, the driving component drives the heating core cylinder to fit against the inner wall of the flaring cone, so that the heating core cylinder conducts heat to the flaring cone, and then the heated flaring cone flares the pipe opening.

[0009] After the flaring is completed, the driving component drives the heating core cylinder to separate from the outer wall of the flared cone cylinder, forming an air insulation layer to keep the heating core cylinder temperature constant. At the same time, it prevents the high temperature of the inner layer from being transferred to the outer layer and introduces cooling water into the water cooling channel to accelerate the cooling speed of the flared cone cylinder.

[0010] Preferably, the clamping mechanism includes a mounting frame fixedly installed on the machine frame, with clamping plates vertically slidably mounted on both the upper and lower ends of the mounting frame via slide rods, and arc-shaped clamping surfaces provided on opposite sides of the clamping plates.

[0011] Preferably, the translation component includes a limiting plate fixedly installed on the frame, a circular through hole in the middle of the limiting plate, limiting rods fixedly installed at the four corners of the side wall of the limiting plate, a moving plate horizontally slidably installed between the limiting rods, a hydraulic push rod fixedly installed between the side of the moving plate away from the limiting plate and the frame, and a double-layer flared component fixedly installed on the side of the moving plate facing the limiting plate.

[0012] Preferably, the flared cone consists of a guide section and a forming section that are fixedly connected. The guide section is a hollow cone and the forming section is cylindrical. The forming section has a frustum-shaped cavity whose diameter gradually increases along its axial direction. The inner diameter of the forming section near the guide section is smaller than the inner diameter of the section away from the guide section.

[0013] Preferably, the heating core is composed of a secondary heating section and a main heating section that are fixedly connected. Both the secondary heating section and the main heating section have annular cross sections. The outer wall of the secondary heating section is in contact with the inner wall of the flared cone guide section, and the outer wall of the main heating section is in contact with the inner wall of the flared cone forming section. The inner walls of the secondary heating section and the main heating section are connected together by a heating coil.

[0014] Preferably, the water cooling channel is composed of a spiral groove and a straight groove. The spiral groove is provided inside the forming section, and the end of the spiral groove is connected to an inlet and an outlet that extend to the outside of the forming section. The straight groove is uniformly provided in the guide section along its circumference, and the end of the straight groove is connected to the spiral groove.

[0015] Preferably, the driving component includes a guide rod and a pneumatic cylinder. A guide hole is provided at the end of the heating core near the translation component. A guide rod is slidably connected in the guide hole. The guide rod is fixedly installed at the moving end of the translation component. The pneumatic cylinder is fixedly installed between the moving end of the translation component and the heating core.

[0016] Preferably, the end of the guide rod away from the translation component and the movable end of the pneumatic cylinder are both provided with buffers. The buffers include a mounting plate, a disc spring is installed on the side wall of the mounting plate, a limiting plate is installed on the side wall of the disc spring, a limiting hole is opened in the middle of both the disc spring and the limiting plate, a limiting rod is installed in the middle of the mounting plate, the limiting rod is slidably inserted into the limiting hole, and the limiting hole opened on the limiting plate only penetrates the side of the limiting plate closest to the disc spring.

[0017] Preferably, the inner annular surface of the heating coil, the inner wall of the guide hole, and the end of the main heating section away from the secondary heating section are all provided with a heat insulation layer.

[0018] As can be seen from the above technical solutions, the hot-melt flaring device for HDPE silicon core tubes designed in this invention has the following beneficial effects: by forming a double-layer flaring mechanism with a heating core and a flaring cone, the heating core and the flaring cone can move relative to each other, and heat is transferred in close contact during flaring and separated for heat insulation during cooling, thus realizing the decoupling of thermal management and structure, ensuring rapid cooling of the flaring cone and constant temperature maintenance of the heating core, effectively avoiding the deformation and cracking problems caused by repeated thermal expansion and contraction of traditional integral flaring heads, and also reducing energy consumption during cooling and heating. Compared with the prior art, it can better adapt to the structural characteristics and flaring process requirements of HDPE silicon core tubes. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is the three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram from another perspective of the present invention.

[0022] Figure 3 This is the front view of the present invention.

[0023] Figure 4 It is a three-dimensional structural diagram of the flared cone after removing part of its structure, along with the frame, moving plate, etc.

[0024] Figure 5 It is a three-dimensional structural diagram of the frame, clamping mechanism and flaring mechanism.

[0025] Figure 6 This is a front sectional view of the present invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the heating core and driving component after some parts of the structure have been removed.

[0027] Figure 8 yes Figure 6 Enlarged diagram of point A in the middle.

[0028] Figure 9 yes Figure 7 Enlarged diagram of point B in the middle.

[0029] Reference numerals: 1. Frame; 2. Flaring mechanism; 3. Clamping mechanism; 31. Mounting frame; 32. Clamping plate; 33. Slide rod; 4. Double-layer flaring assembly; 41. Flaring cone; 411. Guide section; 412. Forming section; 413. Spiral groove; 414. Straight groove; 42. Heating core cylinder; 421. Secondary heating section; 422. Main heating section; 423. Heating coil; 43. Driving component; 431. Guide rod; 432. Pneumatic cylinder; 5. Translation assembly; 51. Limiting plate; 52. Limiting rod; 53. Moving plate; 54. Hydraulic push rod; 6. Buffer component; 61. Mounting plate; 62. Disc spring; 63. Limiting plate; 64. Limiting rod. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] See Figure 1 and Figure 2 A pipe end hot-melt flaring device for HDPE silicon core pipe includes a frame 1, on which a flaring mechanism 2 and a clamping mechanism 3 for fixing the pipe are installed. The flaring mechanism 2 includes a double-layer flaring assembly 4 and a translation assembly 5 for driving the double-layer flaring assembly 4 to move horizontally.

[0032] See Figure 1 and Figure 2 The clamping mechanism 3 includes a mounting frame 31 fixedly installed on the frame 1. The upper and lower ends of the mounting frame 31 are vertically slidably mounted with clamping plates 32 via sliding rods 33. The clamping plates 32 have arc-shaped clamping surfaces on opposite sides.

[0033] The pipe is delivered to the clamping mechanism 3 by an external conveying device. Then, the upper and lower sliding rods 33 are moved relative to each other by an external power component (such as a hydraulic cylinder) until the clamping surface of the clamping plate 32 is in contact with the surface of the pipe, thereby clamping the pipe and keeping it stable during the subsequent flaring process.

[0034] See Figure 1 and Figure 2The translation component 5 includes a limiting plate 51 fixedly installed on the frame 1. A circular through hole is provided in the middle of the limiting plate 51. Limiting rods 52 are fixedly installed at the four corners of the side wall of the limiting plate 51. A moving plate 53 is horizontally slidably installed between the limiting rods 52. During the movement, the limiting rods 52 maintain stability. A hydraulic push rod 54 is fixedly installed between the side of the moving plate 53 away from the limiting plate 51 and the frame 1. A double-layer flared component 4 is fixedly installed on the side of the moving plate 53 facing the limiting plate 51.

[0035] See Figures 1-3 and Figure 7 The double-layer flaring assembly 4 includes a flaring cone 41, a heating core 42 that slides against the inner wall of the flaring cone 41, and a driving member 43 that drives the heating core 42 to move along its axis.

[0036] When the pipe opening is heat-fused and flared, the driving component 43 drives the heating core cylinder 42 to fit against the inner wall of the flaring cone 41, so that the heating core cylinder 42 conducts heat to the flaring cone 41, and then the heated flaring cone 41 flares the pipe opening.

[0037] After the flaring is completed, the driving component 43 drives the heating core cylinder 42 to separate from the outer wall of the flaring cone 41, forming an air insulation layer. This prevents the high temperature of the inner layer from being transferred to the outer layer, accelerates the cooling speed of the flaring cone 41, and keeps the temperature of the heating core cylinder 42 constant. Before the next pipe is flared, there is no need to heat the entire pipe, thus improving the continuity of the flaring operation.

[0038] See Figure 2 and Figure 4 The flared cone 41 is composed of a guide section 411 and a forming section 412 that are fixedly connected. The guide section 411 is hollow cone-shaped so as to extend into the inside of the pipe opening. The forming section 412 is cylindrical, and a frustum-shaped cavity with a gradually increasing diameter along its axial direction is formed inside the forming section 412. The inner diameter of the forming section 412 near the guide section 411 is smaller than the inner diameter of the end away from the guide section 411.

[0039] Continue reading Figure 2 and Figure 4 The forming section 412 has a spiral groove 413 inside. The end of the spiral groove 413 is connected to an inlet and an outlet that extend to the outside of the forming section 412. The inlet and outlet are connected to an external water supply device. The guide section 411 has straight grooves 414 evenly distributed along its circumference. The end of the straight grooves 414 is connected to the spiral groove 413. The spiral groove 413 and the straight groove 414 form a water cooling channel. The water supply device sends water of the corresponding temperature into the spiral groove 413 through the inlet. After passing through the spiral groove 413 and the straight groove 414, the cooling water flows out from the outlet to continuously exchange heat and achieve rapid cooling.

[0040] See Figure 5 , Figure 6 and Figure 7 The heating core cylinder 42 is composed of a secondary heating section 421 and a main heating section 422 that are fixedly connected. Both the secondary heating section 421 and the main heating section 422 have annular cross sections. The outer wall of the secondary heating section 421 is in contact with the inner wall of the guide section 411 of the flared cone cylinder 41, and the outer wall of the main heating section 422 is in contact with the inner wall of the forming section 412 of the flared cone cylinder 41. The inner walls of the secondary heating section 421 and the main heating section 422 are connected together by a heating coil 423. Specifically, an existing annular cast aluminum electric heating coil can be used.

[0041] See Figure 7 The driving component 43 includes a guide rod 431 and a pneumatic cylinder 432. The heating core cylinder 42 has a guide hole at the end near the translation component 5. The guide rod 431 is slidably connected in the guide hole. The guide rod 431 is fixedly installed at the moving end of the translation component 5. The pneumatic cylinder 432 is fixedly installed between the moving end of the translation component 5 and the heating core cylinder 42. Specifically, the guide hole is opened in the main heating section 422 of the heating core cylinder 42. The movable end of the pneumatic cylinder 432 is connected to the inner ring surface of the heating coil 423. The fixed end of the pneumatic cylinder 432 is connected to the side wall of the moving plate 53.

[0042] In the initial state, the pneumatic cylinder 432 drives the outer wall of the heating core cylinder 42 to fit against the inner wall of the flared cone cylinder 41. After the heating coil 423 is energized, it transfers heat to the main heating section 422 and the secondary heating section 421, so that the overall temperature of the heating core cylinder 42 reaches and is maintained at the set value. Specifically, when the pipe wall thickness is 4mm, The temperature is 200-205℃. Since the flared cone 41 and the heating core 42 are in close contact, the temperature of the flared cone 41 is also indirectly heated to this temperature. Then, keep it at a constant temperature for 10-15 seconds.

[0043] When it is necessary to heat melt and flare the pipe, the hydraulic push rod 54 drives the moving plate 53 to move at a constant speed toward the pipe, so that the flaring cone 41 gradually extends into the pipe opening. At this time, the flaring cone 41 conducts heat to the pipe, so that the pipe opening is in a slightly molten state. During this process, the moving plate 53 continues to be pushed at a constant speed, so that the flaring cone 41 continues to move relative to the pipe. During this process, a regular socket is formed at the pipe opening. After the flaring cone 41 moves to the set position, it stays for 10-20 seconds to allow the socket to be initially shaped.

[0044] Next, the pneumatic cylinder 432 drives the outer wall of the heating core cylinder 42 to separate from the inner wall of the flared cone cylinder 41, forming an annular gap, i.e., an air insulation layer, between the heating core cylinder 42 and the flared cone cylinder 41. This achieves heat insulation and prevents the high temperature of the heating core cylinder 42 from being transferred to the flared cone cylinder 41. Subsequently, cooling water is introduced into the spiral groove 413, and the cooling water enters the straight groove 414 through the spiral groove 413, thereby comprehensively cooling the guide section 411 and the forming section 412 of the flared cone cylinder 41, and indirectly cooling the pipe. By precisely cooling the flared cone cylinder 41 that is in contact with the pipe in the above manner, the ineffective time wasted in the traditional solution of cooling the entire flared end and then reheating the whole thing is avoided, thus improving the overall efficiency.

[0045] A high-precision temperature sensor is installed inside the flared cone 41. This sensor is connected to a temperature control linkage module. During cooling, the sensor monitors the temperature at the contact point between the pipe opening and the flared cone 41, displays it in real-time on the equipment's temperature control screen, and provides feedback to the temperature control linkage module. When the pipe opening temperature drops to 50℃±5℃, the temperature control linkage module controls the external water supply equipment to automatically shut off the water cooling channel, stop the cooling water supply, and initiate a residual water drainage procedure to discharge any remaining water in the spiral groove 413 and the straight groove 414 from the outlet. This monitoring method is implemented using existing technology and is not shown in the figure.

[0046] Subsequently, the pneumatic cylinder 432 drives the outer wall of the heating core cylinder 42 to re-fit with the inner wall of the flared cone cylinder 41. Since the heating core cylinder 42 and the flared cone cylinder 41 are insulated during the cooling process, and the heating coil 423 remains heated, the temperature of the heating core cylinder 42 is constant. Utilizing the constant temperature heat of the heating core cylinder 42, the flared cone cylinder 41 quickly recovers through the heat conduction of the heating core cylinder 42, preparing the temperature for the flaring of the next pipe without the need for overall reheating.

[0047] Finally, the hydraulic push rod 54 drives the moving plate 53 to move at a constant speed away from the pipe, so that the flared cone 41 gradually moves out of the pipe opening. Then the clamping mechanism 3 releases its clamp on the pipe so that the pipe can be removed.

[0048] It should be noted that, in order to prevent the molten HDPE material from adhering, a 0.1mm Teflon coating can be applied to the outer wall of the flared cone 41.

[0049] See Figure 7 To prevent the pneumatic cylinder 432 from being overheated and affecting its service life, an insulation layer is provided on the inner ring surface of the heating coil 423. The limiting plate 63 in the buffer 6 corresponding to the moving end of the pneumatic cylinder 432 is fixedly connected to the insulation layer. Specifically, a mica insulating heat insulation sleeve can be used.

[0050] See Figure 7 , Figure 8 and Figure 9To reduce rigid collisions during movement, buffers 6 are provided at the end of the guide rod 431 away from the translation component 5 and at the movable end of the pneumatic cylinder 432. The buffer 6 includes a mounting plate 61, which is installed at the end of the guide rod 431 away from the translation component 5 and at the movable end of the pneumatic cylinder 432. A disc spring 62 is installed on the side wall of the mounting plate 61, and a limiting plate 63 is installed on the side wall of the disc spring 62. Both the disc spring 62 and the limiting plate 63 have limiting holes in the middle. A limiting rod 64 is installed in the middle of the mounting plate 61 and slides into the limiting hole. The limiting hole on the limiting plate 63 only penetrates the side of the limiting plate 63 closest to the disc spring 62. When the limiting rod 64 abuts against the inner wall of the limiting hole on the limiting plate 63, the disc spring 62 cannot continue to deform, thereby avoiding excessive deformation of the disc spring 62 and affecting its service life.

[0051] When the pneumatic cylinder 432 drives the heating core cylinder 42 to move to contact the inner wall of the flared cone cylinder 41, the remaining thrust of the pneumatic cylinder 432 acts on the disc spring 62 through the corresponding mounting plate 61. The disc spring 62 deforms, thereby converting the rigid impact kinetic energy into the elastic potential energy of the spring, achieving soft contact and avoiding rigid collision between the heating core cylinder 42 and the flared cone cylinder 41.

[0052] Similarly, when the driving component 43 drives the heating core cylinder 42 to move in the opposite direction to separate from the flared cone cylinder 41, the inner wall of the guide hole of the heating core cylinder 42 contacts the buffer 6 at the end of the guide rod 431 to avoid rigid collision between the heating core cylinder 42 and the guide rod 431.

[0053] The buffer 6 not only prevents the heating core cylinder 42 and the flaring cone cylinder 41 from being damaged, but also eliminates the high-frequency vibration generated by the instantaneous rigid impact, avoiding problems such as ripples on the inner wall of the flaring, irregular dimensions, and accumulation of molten material caused by vibration, thus ensuring the flaring quality.

[0054] See Figure 7 and Figure 8 To prevent the heat from the heating core 42 from acting on the guide rod 431, an insulation layer is also provided on the inner wall of the guide hole. Specifically, a mica insulation sleeve can be used. To further improve the insulation effect and prevent the heat from the heating core 42 from being lost, an insulation layer can also be provided at the end of the main heating section 422 away from the secondary heating section 421. Specifically, aluminum silicate insulation cotton can be used.

[0055] In summary, the inner heating core 42 in this design maintains a high temperature throughout the entire process, eliminating the need for reheating after each flaring; only minor reheating is required after multiple flaring operations. Simultaneously, the thermal insulation gap between the heating core 42 and the flaring cone 41 effectively reduces heat transfer from the heating core 42 to the water-cooled flaring cone 41, significantly reducing temperature fluctuations. This also allows the flaring cone 41 to quickly return to its operating temperature via heat conduction from the heating core 42 during the next flaring operation, thereby reducing energy consumption and meeting the engineering requirements of batch flaring. Furthermore, a multi-station design can be incorporated to further improve overall efficiency.

[0056] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0057] In the description of this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication 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.

[0059] The above provides a detailed description of a tube end hot-melt flaring device for HDPE silicon core tubes provided by the present invention. For those skilled in the art, based on the ideas of the embodiments of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A pipe end hot-melt flaring device for HDPE silicon core pipes, comprising a frame, wherein a flaring mechanism and a clamping mechanism for fixing the pipe are mounted on the frame, characterized in that: The flaring mechanism includes a double-layer flaring assembly and a translation component that drives the double-layer flaring assembly to move horizontally. The double-layer flaring assembly includes a flaring cone, a heating core that slides against the inner wall of the flaring cone, and a driving component that drives the heating core to move along its axis. The flaring cone is provided with a water-cooling channel inside. When performing hot-melt flaring on the pipe opening, the driving component drives the heating core cylinder to fit against the inner wall of the flaring cone, so that the heating core cylinder conducts heat to the flaring cone, and then the heated flaring cone flares the pipe opening. After the flaring is completed, the driving component drives the heating core cylinder to separate from the outer wall of the flared cone cylinder, forming an air insulation layer to keep the heating core cylinder temperature constant. At the same time, it prevents the high temperature of the inner layer from being transferred to the outer layer and introduces cooling water into the water cooling channel to accelerate the cooling speed of the flared cone cylinder.

2. The tube end hot-melt flaring device for HDPE silicon core tubes according to claim 1, characterized in that, The clamping mechanism includes a mounting frame fixedly installed on the machine frame. Both ends of the mounting frame are vertically and slidably mounted with clamping plates via slide rods. The clamping plates have arc-shaped clamping surfaces on opposite sides.

3. The tube end hot-melt flaring device for HDPE silicon core tubes according to claim 1, characterized in that, The translation component includes a limiting plate fixedly installed on the frame. A circular through hole is provided in the middle of the limiting plate. Limiting rods are fixedly installed at the four corners of the side wall of the limiting plate. A moving plate is horizontally slidably installed between the limiting rods. A hydraulic push rod is fixedly installed between the side of the moving plate away from the limiting plate and the frame. A double-layer flared component is fixedly installed on the side of the moving plate facing the limiting plate.

4. The tube end hot-melt flaring device for HDPE silicon core tubes according to claim 1, characterized in that, The flared cone consists of a guide section and a forming section that are fixedly connected. The guide section is hollow and conical, and the forming section is cylindrical. The forming section has a frustum-shaped cavity whose diameter gradually increases along its axial direction. The inner diameter of the forming section near the guide section is smaller than the inner diameter of the section away from the guide section.

5. The tube end hot-melt flaring device for HDPE silicon core tubes according to claim 4, characterized in that, The heating core consists of a secondary heating section and a main heating section that are fixedly connected. Both the secondary heating section and the main heating section have annular cross sections. The outer wall of the secondary heating section is in contact with the inner wall of the flared cone guide section, and the outer wall of the main heating section is in contact with the inner wall of the flared cone forming section. The inner walls of the secondary heating section and the main heating section are connected together by a heating coil.

6. The tube end hot-melt flaring device for HDPE silicon core tubes according to claim 4, characterized in that, The water cooling channel is composed of a spiral groove and a straight groove. The spiral groove is opened inside the forming section. The end of the spiral groove is connected to the water inlet and water outlet that extend to the outside of the forming section. The straight groove is evenly opened along its circumference inside the guide section. The end of the straight groove is connected to the spiral groove.

7. The tube end hot-melt flaring device for HDPE silicon core tubes according to claim 5, characterized in that, The driving component includes a guide rod and a pneumatic cylinder. A guide hole is provided at the end of the heating core near the translation component. A guide rod is slidably connected in the guide hole. The guide rod is fixedly installed at the moving end of the translation component. The pneumatic cylinder is fixedly installed between the moving end of the translation component and the heating core.

8. The tube end hot-melt flaring device for HDPE silicon core tubes according to claim 7, characterized in that, Both the end of the guide rod away from the translation component and the movable end of the pneumatic cylinder are equipped with buffer components. The buffer components include a mounting plate, a disc spring is mounted on the side wall of the mounting plate, a limiting plate is mounted on the side wall of the disc spring, a limiting hole is opened in the middle of both the disc spring and the limiting plate, a limiting rod is mounted in the middle of the mounting plate, and the limiting rod is slidably inserted into the limiting hole. The limiting hole opened on the limiting plate only penetrates the side of the limiting plate closest to the disc spring.

9. A pipe end hot-melt flaring device for HDPE silicon core pipes according to claim 8, characterized in that, The inner annular surface of the heating coil, the inner wall of the guide hole, and the end of the main heating section away from the secondary heating section are all provided with a heat insulation layer.

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