Continuous fiber reinforced thermoplastic composite pipe forming apparatus and forming method

Abstract

This invention discloses a molding apparatus and method for continuous fiber-reinforced thermoplastic composite pipes, relating to the field of material molding technology. A base is slidably mounted on a guiding mechanism, a second driving mechanism is disposed on a fixed base, and a mandrel is detachably mounted on the second driving mechanism. A winding mechanism and a welding mechanism are respectively disposed on both sides of the mandrel. The winding mechanism includes a first support base, a first rotary driving component, a guiding mold, a first support plate, a second rotary driving component, and a mandrel. The demolding mechanism includes two demolding assemblies, each comprising a linear driving component and a demolding module disposed at one end of the linear driving component. When the two demolding modules move towards each other and dock, a gap exists between them and the mandrel, and the prepreg-made pipe product on the mandrel can be axially limited. This molding apparatus and method can meet the mechanical performance requirements of the pipe, facilitate demolding of the finished pipe product, and has high working efficiency.

Description

Technical Field

[0001] This invention relates to the field of material forming technology, and in particular to a continuous fiber-reinforced thermoplastic composite pipe forming apparatus and forming method. Background Technology

[0002] Continuous fiber-reinforced thermoplastic composite pipes possess advantages such as high temperature resistance, chemical solvent resistance, low temperature resistance, radiation resistance, aging resistance, high mechanical properties, and impact resistance. They are widely used in aerospace, aviation, and nuclear industries, and can replace aluminum alloy pipes to achieve structural weight reduction. To ensure the safety and airtightness of high-pressure systems such as crude oil, hydraulic, fuel oil, steam, and environmental control systems, high requirements are placed on pipe forming quality, pressure resistance, and impact resistance. Especially for deep-sea oil production pipelines, high-performance thermoplastic composite pipes can, to some extent, move and deform with the water flow, and the material's resistance to hydrolysis and corrosion allows it to leverage its unique advantages. However, in actual production, composite pipes manufactured using existing equipment have poor mechanical properties, and the finished pipes are difficult to demold, resulting in low work efficiency. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a continuous fiber reinforced thermoplastic composite pipe forming device and forming method, which can meet the mechanical properties required for the pipe, facilitate the demolding of the finished pipe, and has high working efficiency.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] This invention provides a continuous fiber-reinforced thermoplastic composite pipe forming device, comprising a base, a fixed seat, a mandrel, a guiding mechanism, a first driving mechanism, a second driving mechanism, a winding mechanism, a welding mechanism, a demolding mechanism, and two fixing rings. The base is slidably mounted on the guiding mechanism. The first driving mechanism drives the base to reciprocate along the guiding mechanism. The fixed seat is disposed on the upper part of the base. The second driving mechanism is disposed on the fixed seat. The mandrel is detachably mounted on the second driving mechanism, which drives the mandrel to rotate. The length direction of the mandrel is consistent with the length direction of the guiding mechanism. The winding mechanism and the welding mechanism are respectively disposed on both sides of the mandrel. The winding mechanism includes a first support seat, a first rotary driving component, a guiding mold, a first support plate, a second rotary driving component, and a mandrel. The first rotary driving component is disposed on... At the lower end of the first support base, the guide mold is disposed at the lower end of the first rotary drive component. A first support plate is disposed on one side of the guide mold. The second rotary drive component is disposed on the first support plate. The mandrel is connected to the second rotary drive component. The mandrel is used to wind the prepreg. A strip-shaped guide hole penetrating both ends is disposed in the middle of the guide mold. The strip-shaped guide hole is used to guide the prepreg. The demolding mechanism includes two demolding components, which are respectively disposed on both sides of the mandrel. Each demolding component includes a linear drive component and a demolding module disposed at one end of the linear drive component. The two linear drive components are used to drive the two demolding modules to move towards each other or away from each other. When the two demolding modules move towards each other to dock, there is a gap between them and the mandrel. The two demolding modules can limit the finished pipe made of the prepreg on the mandrel in the axial direction.

[0006] Preferably, the device further includes a frame, which includes a base plate, a demolding bracket, a first column, and a second column. The guiding mechanism is disposed on the base plate. The first column and the second column are respectively fixed to both sides of the base plate. The winding mechanism is disposed on the upper part of the first column. The welding mechanism is disposed on the upper part of the second column. The demolding bracket includes a top plate and two vertical brackets. The lower ends of the two vertical brackets are respectively fixed to both sides of the base plate. The upper ends of the two vertical brackets are connected through the top plate. Each vertical bracket is provided with a demolding component.

[0007] Preferably, the winding mechanism further includes a guide roller and a second support plate. The second support plate is provided on the other side of the guide mold. The two ends of the guide roller are rotatably mounted on the first support plate and the second support plate, respectively. The guide roller is disposed between the mandrel and the guide mold.

[0008] Preferably, the first driving mechanism includes a rack, a gear, and a first driving motor. The length direction of the rack is consistent with the length direction of the guide mechanism. The first driving motor is disposed on the upper part of the base. The power output shaft of the first driving motor passes through the base, extends to the lower part, and is fixedly sleeved with the gear. The gear meshes with the rack.

[0009] Preferably, the guiding mechanism includes two parallel guide rails, the rack is located between the two guide rails, and the lower surface of the base is provided with two strip-shaped grooves, each of which is slidably mounted on one of the guide rails.

[0010] Preferably, the second drive mechanism includes a second drive motor, a mounting sleeve, and multiple limiting blocks. The second drive motor is disposed on one side of the fixed base, and the power output shaft of the second drive motor extends through the fixed base to the other side and is fixedly fitted with the mounting sleeve. The mounting sleeve has multiple insertion holes arranged circumferentially, and the end of the core mold has multiple insertion slots arranged circumferentially. The core mold is used to be fitted into the mounting sleeve, and each of the limiting blocks is used to pass through one of the insertion holes and extend into one of the insertion slots.

[0011] Preferably, the welding mechanism includes a second support base, a U-shaped bracket, a bottom platform, a support table, a rotary table, a rotating rod, a handle, a set screw, a drive assembly, multiple welding torches, multiple guide rods, and multiple sliders. The U-shaped bracket is fixed to the lower part of the second support base. Both ends of each guide rod are respectively fixed to the U-shaped bracket. Each slider is slidably mounted on one of the guide rods. The bottom platform is fixed to multiple sliders. The drive assembly is used to drive the bottom platform to reciprocate along the guide rods. The support table is fixed to the bottom platform. A first support plate and a second support plate are respectively provided at both ends away from the second support base. The lower end of the rotary table is located between the first support plate and the second support plate. The rotating rod is fixedly sleeved in the rotary table. One end of the rotating rod is rotatably mounted on the first support plate through a bearing and the handle is fixed thereon. The other end of the rotating rod is rotatably mounted on the second support plate through a bearing. The outer end of the second support plate is provided with a first threaded hole. The set screw is installed in the first threaded hole and can abut against the end face of the rotating rod. Each welding torch can be detachably mounted on the rotary table.

[0012] Preferably, the welding mechanism further includes a guide plate and multiple connecting columns. The guide plate is fixed to the side of the rotary table away from the second support base by the multiple connecting columns. The guide plate is provided with multiple guide holes. The welding torch includes a welding torch body, a welding torch head, an annular stop block, and a spring. The rotary table is provided with multiple second threaded holes. The outer wall of the welding torch body is provided with external threads. The rear end of the welding torch body is installed in the second threaded hole. The annular stop block is fixedly sleeved on the welding torch head. The rear end of the welding torch head is slidably installed in the welding torch body. The front end of the welding torch head extends to the outside through the guide hole. The spring is sleeved on the welding torch head, and the two ends of the spring are respectively connected to the welding torch body and the annular stop block.

[0013] Preferably, the drive assembly includes a lead screw, a lead screw nut, and a third drive motor. The two ends of the lead screw are rotatably mounted on the U-shaped bracket, the lead screw nut is mounted on the lead screw, and the lead screw nut is fixedly connected to the bottom platform. The third drive motor is located on the outside of the U-shaped bracket and is used to drive the lead screw to rotate.

[0014] The present invention also provides a molding method based on a continuous fiber reinforced thermoplastic composite pipe molding device, comprising the following steps:

[0015] Step 1: Treat the core mold with a high-temperature resistant release agent and install the core mold on the second drive mechanism;

[0016] Step 2: Wrap one end of the prepreg around the mandrel, and extend the other end of the prepreg through the strip guide hole to the outside of the guide mold. Adjust the guide mold by the first rotary drive component, thereby adjusting the angle between the prepreg and the mandrel. Fix the end of the prepreg to the mandrel using a fixing ring. At the same time, activate the second rotary drive component, the first drive mechanism, and the second drive mechanism. The second rotary drive component drives the mandrel to rotate and output the prepreg outward. The first drive mechanism drives the base, the fixing seat, and the mandrel to move along the guide mechanism. The second drive mechanism drives the mandrel to rotate, thereby causing the prepreg to wrap around the mandrel.

[0017] Step 3: After the first layer of prepreg is wrapped around the core mold, it is fixed with tape. After the first layer of prepreg is wrapped, the tail is fixed with another fixing ring.

[0018] Step 4: Before winding the prepreg, adjust the angle between the prepreg and the mandrel using the first rotary drive component. During the subsequent winding of the prepreg, the welding mechanism is used for welding. At the same time, the tape used to fix the first layer of prepreg and the mandrel is removed. After all layers are wound, the fixing ring is used to fix them to form a preform.

[0019] Step 5: Remove the core mold and the preform from the second drive mechanism, package them in vacuum bags, seal them with high-temperature putty strips, and then vacuum them.

[0020] Step 6: Place the preformed body after vacuuming into a high-temperature and high-pressure tank for heating and pressurization, and remove it after cooling to room temperature to obtain the finished pipeline.

[0021] Step 7: Reinstall the core mold onto the second drive mechanism, placing the core mold and the finished pipe between the two demolding components. Remove the fixing rings at both ends. The two linear drive components drive the two demolding modules to move towards each other, without contacting the core mold. Then, the first drive mechanism drives the base, fixing seat, and core mold to move along the guide mechanism. Under the blocking action of the two demolding modules, the finished pipe does not move, thereby separating the core mold from the finished pipe, and the finished pipe can be removed.

[0022] The present invention achieves the following technical effects compared to the prior art:

[0023] This invention relates to a continuous fiber-reinforced thermoplastic composite pipe forming apparatus and method. After the first layer of prepreg is wound around the mandrel, it is fixed with tape. Once the first layer of prepreg is finished, a retaining ring is used to secure the tail end. During subsequent prepreg winding, a welding mechanism is used for welding, while the tape used to fix the first layer of prepreg to the mandrel is removed. After all layers are wound, a retaining ring is used for fixation. The winding and welding mechanisms work together efficiently and include a built-in demolding mechanism for easy demolding of the finished pipe. According to structural design requirements, the winding mechanism can control the prepreg angle, thereby precisely controlling the prepreg layup required for pipe forming and meeting the required mechanical properties of the pipe. This forming apparatus occupies little space, can form multiple batches of pipes, and can also form large composite pipes. The forming process is simple and easy for on-site workers to operate. Attached Figure Description

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the overall structure of the continuous fiber-reinforced thermoplastic composite pipe forming device provided by the present invention;

[0026] Figure 2A schematic diagram of the continuous fiber-reinforced thermoplastic composite pipe forming apparatus provided by the present invention after removing the frame;

[0027] Figure 3 This is a schematic diagram of the winding mechanism in the continuous fiber reinforced thermoplastic composite pipe forming device provided by the present invention;

[0028] Figure 4 This is a schematic diagram of the winding mechanism in the continuous fiber reinforced thermoplastic composite pipe forming device provided by the present invention.

[0029] Figure 5 A schematic diagram of the welding mechanism in the continuous fiber-reinforced thermoplastic composite pipe forming device provided by the present invention;

[0030] Figure 6 A schematic diagram of the welding mechanism in the continuous fiber-reinforced thermoplastic composite pipe forming device provided by the present invention;

[0031] Figure 7 This is a schematic diagram of the welding torch in the continuous fiber-reinforced thermoplastic composite pipe forming device provided by the present invention;

[0032] Figure 8 This is a schematic diagram of the welding torch working in the continuous fiber-reinforced thermoplastic composite pipe forming device provided by the present invention.

[0033] Figure 9 This is a schematic diagram of the core mold and fixing ring in the continuous fiber reinforced thermoplastic composite pipe forming device provided by the present invention;

[0034] Figure 10 This is a schematic diagram of the demolding mechanism in the continuous fiber reinforced thermoplastic composite pipe forming device provided by the present invention.

[0035] Explanation of reference numerals in the attached drawings: 100. Continuous fiber-reinforced thermoplastic composite pipe forming device; 1. Base; 2. Fixed seat; 3. Mandrel; 4. Guide rail; 5. Winding mechanism; 51. First support seat; 52. First rotary drive component; 53. Guide mold; 54. Strip guide hole; 55. First support plate; 56. Second support plate; 57. Second rotary drive component; 58. Mandrel; 59. Guide roller; 6. Welding mechanism; 61. Second support seat; 62. U-shaped bracket; 63. Guide rod; 64. Slider; 65. Bottom platform; 66. Support table; 67. Rotary table; 68. First support plate; 69. Rotating rod; 610. 611. Handle; 612. Guide plate; 613. Connecting column; 614. Welding gun body; 615. Welding gun head; 616. Annular stop block; 617. Spring; 618. Second support plate; 619. Ejector screw; 7. Demolding mechanism; 71. Linear drive component; 72. Demolding module; 8. Fixing ring; 81. Semi-ring structure; 82. Fastening screw; 9. Base plate; 10. First column; 11. Second column; 12. Top plate; 13. Vertical bracket; 14. Foot; 15. Rack; 16. Controller; 17. First drive motor; 18. Second drive motor; 19. Mounting sleeve; 20. Limiting insert; 21. Insertion slot; 22. Finished pipeline. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only 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.

[0037] The purpose of this invention is to provide a continuous fiber reinforced thermoplastic composite pipe forming device and forming method, which can meet the mechanical properties required for pipes, facilitate the demolding of finished pipes, and have high working efficiency.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1:

[0040] like Figures 1-10As shown, this embodiment provides a continuous fiber-reinforced thermoplastic composite pipe forming device 100, including a base 1, a fixed seat 2, a mandrel 3, a guiding mechanism, a first driving mechanism, a second driving mechanism, a winding mechanism 5, a welding mechanism 6, a demolding mechanism 7, and two fixing rings 8. The base 1 is slidably mounted on the guiding mechanism. The first driving mechanism drives the base 1 to reciprocate along the guiding mechanism. The fixed seat 2 is disposed on the upper part of the base 1 and is perpendicular to the base 1. The second driving mechanism is disposed on the fixed seat 2. The mandrel 3 is detachably mounted on the first driving mechanism. On the second drive mechanism, the second drive mechanism is used to drive the core mold 3 to rotate, and the length direction of the core mold 3 is consistent with the length direction of the guide mechanism; the winding mechanism 5 and the welding mechanism 6 are respectively arranged on both sides of the core mold 3. The winding mechanism 5 includes a first support base 51, a first rotary drive component 52, a guide mold 53, a first support plate 55, a second rotary drive component 57, and a mandrel 58. The first rotary drive component 52 is arranged at the lower end of the first support base 51, and the guide mold 53 is arranged at the lower end of the first rotary drive component 52. The first rotary drive component 52 is used to drive the core mold 3 to rotate. The guide mold 53 is rotated. A first support plate 55 is provided on one side of the guide mold 53. A second rotary drive component 57 is provided on the first support plate 55. A mandrel 58 is connected to the second rotary drive component 57. The mandrel 58 is used to wind the prepreg. The second rotary drive component 57 is used to drive the mandrel 58 to rotate, thereby conveying the prepreg outward during operation. At the same time, the tension of the prepreg during winding can be controlled by adjusting the torque of the second rotary drive component 57. During operation, the tension is maintained between 10N and 800N. A through-hole is provided in the middle of the guide mold 53. The strip-shaped guide holes 54 at both ends are used to guide the prepreg material; the demolding mechanism 7 includes two demolding components, which are respectively disposed on both sides of the core mold 3. The demolding components include a linear drive component 71 and a demolding module 72 disposed at one end of the linear drive component 71. The two linear drive components 71 are used to drive the two demolding modules 72 to move towards each other or away from each other. When the two demolding modules 72 move towards each other to dock, there is a gap between them and the core mold 3, and they can limit the finished pipe 22 made of prepreg material on the core mold 3 in the axial direction.

[0041] like Figure 1As shown, this embodiment also includes a frame, which includes a base plate 9, a demolding bracket, a first column 10 and a second column 11. A guide mechanism is set on the base plate 9. Multiple feet 14 are installed on the bottom surface of the base plate 9. The first column 10 and the second column 11 are respectively fixed to both sides of the base plate 9. Multiple feet 14 are installed on the bottom surfaces of both the first column 10 and the second column 11. A winding mechanism 5 is set on the upper part of the first column 10. A first support seat 51 is fixed on the upper part of the first column 10. A welding mechanism 6 is set on the upper part of the second column 11. The demolding bracket includes a top plate 12 and two vertical brackets 13. The lower ends of the two vertical brackets 13 are respectively fixed to both sides of the base plate 9. The upper ends of the two vertical brackets 13 are connected through the top plate 12. Each vertical bracket 13 is provided with a demolding component.

[0042] Specifically, the vertical support 13 includes a vertical plate and a horizontal plate fixed to one side of the bottom of the vertical plate. The upper ends of the two vertical plates are connected by a top plate 12, and the two horizontal plates are respectively fixed to the two sides of the bottom plate 9. In this embodiment, the linear drive component 71 is a cylinder. The cylinder body is fixed to the outside of the vertical plate, and the piston rod of the cylinder passes through the vertical plate and extends to the inside and is fixed with a release module 72. The inner wall of the release module 72 has an arc surface structure.

[0043] like Figure 3 and Figure 4 As shown, the winding mechanism 5 also includes a guide roller 59 and a second support plate 56. The second support plate 56 is provided on the other side of the guide mold 53. The two ends of the guide roller 59 are rotatably mounted on the first support plate 55 and the second support plate 56, respectively. The guide roller 59 is located between the mandrel 58 and the guide mold 53. One end of the prepreg extending from the mandrel 58 passes through the guide roller 59, enters the strip-shaped guide hole 54 of the guide mold 53, and extends to the outside. The guide roller 59 is used to apply a certain guiding force to the prepreg, and the guide mold 53 is used to guide the prepreg.

[0044] In this specific embodiment, the first rotary drive component 52 is a first rotary drive motor, and the power output shaft of the first rotary drive motor is vertically arranged and fixedly connected to the top of the guide mold 53. The second rotary drive component 57 is a second rotary drive motor, and the power output shaft of the second rotary drive motor is horizontally arranged and fixedly connected to the mandrel 58. The mandrel 58 and the guide mold 53 are located on the same side of the first support plate 55. In this embodiment, the mandrel 58 is an air-expanded mandrel, which is used to wind the prepreg, and its outer diameter is 75-80 mm.

[0045] The first driving mechanism includes a rack 15, a gear, and a first driving motor 17. The length direction of the rack 15 is consistent with the length direction of the guiding mechanism. In this embodiment, both the rack 15 and the guiding mechanism are fixed to the upper surface of the base plate 9. The first driving motor 17 is located on the upper part of the base 1. The power output shaft of the first driving motor 17 passes through the base 1, extends to the lower part, and is fixedly fitted with a gear. The gear meshes with the rack 15. When it is necessary to drive the core mold 3 to move along the length direction of the guiding mechanism, the second driving motor 18 is turned on to drive the gear to rotate, thereby enabling the base 1, the fixed seat 2 on the base 1, and the core mold 3 to move along the length direction of the guiding mechanism.

[0046] The guiding mechanism includes two parallel guide rails 4, a rack 15 located between the two guide rails 4, and two strip grooves provided on the lower surface of the base 1. Each strip groove is slidably mounted on one guide rail 4, thereby making the base 1 stably slidably mounted on the two guide rails 4.

[0047] The second drive mechanism includes a second drive motor 18, a mounting sleeve 19, and multiple limiting blocks 20. The second drive motor 18 is located on one side of the fixed base 2. The power output shaft of the second drive motor 18 passes through the fixed base 2 and extends to the other side, where it is fixedly fitted with the mounting sleeve 19. The mounting sleeve 19 has multiple insertion holes arranged circumferentially, and the end of the core mold 3 has multiple insertion slots 21 arranged circumferentially. The core mold 3 is used to fit into the mounting sleeve 19. Each limiting block 20 is used to pass through an insertion hole and extend into an insertion slot 21. The limiting blocks 20 can fix the core mold 3 to the mounting sleeve 19. During operation, the second drive motor 18 is turned on, which drives the mounting sleeve 19 and the core mold 3 to rotate. When it is necessary to remove the core mold 3 from the mounting sleeve 19, the multiple limiting blocks 20 are removed, and the core mold 3 can then be pulled out of the mounting sleeve 19.

[0048] like Figure 5 and Figure 6As shown, the welding mechanism 6 includes a second support base 61, a U-shaped bracket 62, a bottom platform 65, a support table 66, a rotary table 67, a rotating rod 69, a handle 610, a set screw 618, a drive assembly, multiple welding torches, multiple guide rods 63, and multiple sliders 64. The second support base 61 is fixed to the upper part of the second column 11, the U-shaped bracket 62 is fixed to the lower part of the second support base 61, both ends of each guide rod 63 are fixed to the U-shaped bracket 62, each slider 64 is slidably mounted on a guide rod 63, the bottom platform 65 is fixed to multiple sliders 64, and the drive assembly is used to drive the bottom platform 65 to reciprocate along the guide rods 63; the support table 66 is fixed to the bottom platform. On the support platform 65, the two ends of the support platform 66 away from the second support base 61 are respectively provided with the first support plate 68 and the second support plate 617. The lower end of the rotating platform 67 is located between the first support plate 68 and the second support plate 617. The rotating rod 69 is fixedly sleeved in the rotating platform 67. One end of the rotating rod 69 is rotatably mounted on the first support plate 68 through a bearing and is fixed with a handle 610. The other end of the rotating rod 69 is rotatably mounted on the second support plate 617 through a bearing. The outer end of the second support plate 617 is provided with a first threaded hole. The set screw 618 is installed in the first threaded hole and can abut against the end face of the rotating rod 69. Each welding gun can be detachably mounted on the rotating platform 67. In this embodiment, the welding gun is an ultrasonic welding gun. When it is necessary to adjust the tilt angle of the rotary table 67 and the welding torch, turn the set screw 618 outward so that it is no longer pressed against the rotating rod 69. At this time, the rotating rod 69 can be rotated by the handle 610, which in turn causes the rotary table 67 to rotate. When the rotary table 67 is rotated to the desired position, tighten the set screw 618 so that it is pressed against the rotating rod 69, so that the rotary table 67 and the support platform 66 are relatively fixed. Adjusting the angle of the welding torch allows for welding of the prepreg from multiple directions, thereby ensuring good fixation between the prepreg layers. At the same time, the bottom platform 65, the support platform 66, the rotary table 67 and the welding torch can be moved along the guide rod 63 by the drive assembly, which can adjust the distance between the welding torch and the core mold 3.

[0049] The welding mechanism 6 also includes a guide plate 611 and multiple connecting columns 612. The guide plate 611 is fixed to the side of the rotary table 67 away from the second support base 61 by the multiple connecting columns 612. The guide plate 611 is parallel to the rotary table 67, and the guide plate 611 is provided with multiple guide holes, such as... Figure 7As shown, the welding torch includes a welding torch body 613, a welding torch head 614, an annular stop block 615, and a spring 616. The rotary table 67 is provided with multiple second threaded holes, and the outer wall of the welding torch body 613 is provided with external threads. The rear end of the welding torch body 613 is installed in the second threaded hole. The threaded installation of the welding torch body 613 and the rotary table 67 makes it easy to install and disassemble the welding torch, and thus allows different welding torches to be replaced according to actual needs. An annular stop 615 is fixedly sleeved on the welding torch head 614. The front end of the welding torch body 613 has a cavity for the welding torch head 614 to slide in. The rear end of the welding torch head 614 is slidably installed in the welding torch body 613. The front end of the welding torch head 614 extends to the outside through a guide hole. A spring 616 is sleeved on the welding torch head 614, located between the welding torch body 613 and the annular stop 615. Both ends of the spring 616 are connected to the welding torch body 613 and the annular stop 615, respectively. Specifically, the diameter of the welding torch head 614 can be selected according to the inner diameter of the pipe to be formed, and the diameter of the welding torch head 614 is between 5mm and 25mm. Figure 8 As shown, during operation, the front end of the welding torch head 614 contacts the surface to be welded. By adopting a structure in which the welding torch head 614 and the welding torch body 613 are slidably mounted together, and an annular stop block 615 and a spring 616 are provided, multiple welding torch heads 614 can contact the surface to be welded when facing an uneven surface, thereby achieving uniform welding.

[0050] The drive assembly includes a lead screw, a lead screw nut, and a third drive motor. The two ends of the lead screw are rotatably mounted on a U-shaped bracket 62. The lead screw nut is mounted on the lead screw and fixedly connected to the bottom platform 65. The third drive motor is located on the outside of the U-shaped bracket 62 and is used to drive the lead screw to rotate. When it is necessary to adjust the distance between the welding torch and the mandrel 3, the third drive motor is activated. Through the mechanism of the lead screw and nut engaging with the lead screw, the bottom platform 65 can be moved along the guide rod 63.

[0051] like Figure 9 As shown, the retaining ring 8 is used to fix the head of each layer of prepreg. The retaining ring 8 is a semi-ring structure 81 with two fastening screws 82 and fastening nuts. It can be easily removed after the layer is laid up. The gap between the retaining ring 8 and the core mold 3 is 0.5mm to 2mm.

[0052] This embodiment also includes a controller 16. The first drive mechanism, the second drive mechanism, the drive assembly, the first rotary drive component 52, the second rotary drive component 57, and the linear drive component 71 are all connected to the controller 16. Specifically, the first drive motor 17, the second drive motor 18, and the third drive motor are all connected to the controller 16, and the controller 16 is fixed to the upper part of the first column 10.

[0053] This embodiment also provides a molding method based on a continuous fiber reinforced thermoplastic composite pipe molding device 100, including the following steps:

[0054] Step 1: Treat the core mold 3 with a high-temperature resistant release agent and install the core mold 3 on the second drive mechanism; specifically, fix the core mold 3 to the mounting sleeve 19 by means of the limiting insert 20.

[0055] Step 2: One end of the prepreg is wound around the mandrel 58, and the other end of the prepreg extends through the strip guide hole 54 to the outside of the guide mold 53. The guide mold 53 is adjusted by the first rotary drive component 52, thereby adjusting the angle between the prepreg and the mandrel 3. The end of the prepreg is fixed to the mandrel 3 with a fixing ring 8. At the same time, the second rotary drive component 57, the first drive mechanism, and the second drive mechanism are activated. The second rotary drive component 57 drives the mandrel 58 to rotate, thereby outputting the prepreg outward. The first drive mechanism drives the base 1, the fixed seat 2, and the mandrel 3 to move along the guide mechanism. The second drive mechanism drives the mandrel 3 to rotate, thereby causing the prepreg to be wound around the mandrel 3. In this embodiment, the second rotary drive component 57, the first drive motor 17, and the second drive motor 18 work together to achieve the winding of the prepreg onto the mandrel 3. The winding rate is related to the prepreg feed rate, the mandrel 3 feed rate, and the mandrel 3 rotation rate. The prepreg feed rate is 30-80 mm every 1-3 seconds until winding is completed.

[0056] Step 3: After the first layer of prepreg is wrapped around the core mold 3, it is fixed with tape. After the first layer of prepreg is wrapped, the tail is fixed with another fixing ring 8. In this embodiment, the tape used is polyimide tape.

[0057] Step 4: Before the subsequent winding of the prepreg, the angle between the prepreg and the mandrel 3 is adjusted by the first rotary drive component 52. During the subsequent winding of the prepreg, the welding mechanism 6 is used for welding. At the same time, the tape used to fix the first layer of prepreg and the mandrel 3 is removed. After all layers are wound, the fixing ring 8 is used to fix them to form a preform. In this embodiment, the welding temperature is 280℃~350℃. During operation, welding is performed at intervals of 10mm along the winding direction of the prepreg, and the welding time for each welding is 1s~3s.

[0058] Step 5: Remove the core mold 3 and the preform from the second drive mechanism, package them in a vacuum bag, seal them with high-temperature putty strips, and then vacuum them; in this embodiment, the vacuum bag used is a polyimide vacuum bag.

[0059] Step Six: Place the preformed body after vacuuming into a high-temperature, high-pressure vessel for heating and pressurization. After cooling to room temperature, remove it to obtain the finished pipeline 22. Specifically, after placing it in the high-temperature, high-pressure vessel, heat it to 200–360°C, making the pressure 1–2 MPa. Hold the temperature for 30 minutes, then begin cooling. Remove it after cooling to room temperature. Heat it to 200–360°C at a rate of 3–5°C / min, and cool it to room temperature at a rate of 10–50°C / min.

[0060] Step 7: Reinstall the core mold 3 onto the second drive mechanism, placing the core mold 3 and the finished pipe 22 between the two demolding components. Remove the retaining rings 8 at both ends. The two linear drive components 71 drive the two demolding modules 72 to move towards each other. The demolding modules 72 do not contact the core mold 3. Then, the first drive mechanism drives the base 1, the fixed seat 2, and the core mold 3 to move along the guide mechanism. Under the blocking action of the two demolding modules 72, the finished pipe 22 does not move, thereby separating the core mold 3 from the finished pipe 22, and the finished pipe 22 can be removed.

[0061] In this specific embodiment, the width of the prepreg is 50mm to 150mm, the wall thickness of the finished pipe 22 is 0.5mm to 2.0mm, and the inner diameter of the finished pipe 22 is 30mm to 200mm.

[0062] The prepreg in this embodiment is a continuous fiber reinforced thermoplastic prepreg, which includes thermoplastic resin and fiber. The fiber includes, but is not limited to, carbon fiber, glass fiber, quartz fiber, basalt fiber, polyimide fiber, or aramid fiber. The thermoplastic resin includes, but is not limited to, polyetheretherketone (PEEK), polyaryletherketone (PAEK), polyimide (PI), polyphenylene sulfide (PPS), polycarbonate (PC), polyamide (PA), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene copolymer (ABS), polypropylene (PP), or polyethylene (PE). The volume content of fiber in the continuous fiber reinforced thermoplastic prepreg is 40-65%.

[0063] In this specific embodiment, the molding method based on the continuous fiber reinforced thermoplastic composite pipe molding apparatus 100 includes the following steps:

[0064] (1) Soak a degreased cloth with cleaning agent and wipe the core mold 3 to ensure that there is no pollution or impurities on the contact surface between the molding device and the pipe; use gauze dipped in high temperature release agent to wipe the core mold 3 repeatedly more than three times; install the core mold 3 with an outer diameter of 50mm and a length of 1000mm in the installation sleeve 19.

[0065] (2) Take a roll of continuous fiber reinforced polyaryletherketone high-performance thermoplastic prepreg with a width of 100mm and a single-layer curing thickness of 0.15mm and fix it on the mandrel 58 of the winding mechanism 5. Adjust the winding mechanism 5 so that the prepreg is at +45° with the axis of the mandrel 3 and fix its end on the fixing ring 8.

[0066] (3) Rotate the core mold 3, control the tension of the winding mechanism 5 to 100N, and the winding speed to 30mm / s. The first layer is fixed with polyimide tape every 50mm. After the first layer is finished, cut the prepreg and fix the tail end with the fixing ring 8.

[0067] (4) The second layer of prepreg is wound at an angle of -45° and is also fixed by the fixing ring 8. An ultrasonic welding gun with a 10mm welding gun head 614 diameter is used to weld once along the winding direction of the prepreg at intervals of 10mm. At the same time, the polyimide tape used to fix the first layer of prepreg and the core mold 3 is removed. After the second layer is finished, the prepreg is cut off and the fixing ring 8 fixes the tail end.

[0068] (5) The third layer is +45°, the fourth layer is -45° and the same as step (4). The piling angles of the fifth to eighth layers are -45°, +45°, -45° and +45° respectively, and the steps are the same as (4).

[0069] (6) The preform and the core mold 3 are packaged in a vacuum bag, sealed with high-temperature putty strips, and vacuumed to -0.01MPa.

[0070] (7) Place the vacuum-packed preform into a high-temperature and high-pressure vessel, heat it to 360°C, 1MPa, and keep it at that temperature for 20 minutes.

[0071] (8) Take out the formed pipeline, remove the vacuum bag, and fix the ring 8.

[0072] (9) Fix the core mold 3 in the mounting sleeve 19 and eject it using the demolding mechanism 7 to obtain a continuous fiber-reinforced polyaryletherketone high-performance thermoplastic composite pipeline with an inner diameter of 50mm, a length of 1000mm, and a thickness of 1.2mm.

[0073] In this embodiment, the first layer of prepreg is wrapped around the mandrel 3 and then fixed with tape. After the first layer of prepreg is wrapped, the tail is fixed with a retaining ring 8. During the subsequent prepreg wrapping process, a welding mechanism 6 is used for welding, and the tape used to fix the first layer of prepreg to the mandrel 3 is removed. After all layers are wrapped, the retaining ring 8 is used for fixation. The winding mechanism 5 and the welding mechanism 6 work together, which is highly efficient. The device also has a built-in demolding mechanism 7, which facilitates the demolding of the finished pipe 22. According to the structural design requirements, the winding mechanism 5 can control the angle of the prepreg, thereby precisely controlling the prepreg layup required for pipe forming and meeting the mechanical properties required for the pipe. This forming device occupies little space, can form multiple batches of pipes, and can also form large composite material pipes. The forming process is simple and easy for on-site workers to operate. The thickness of the finished pipe 22 formed by this method can be precisely controlled, which can ensure the high performance and pass rate of the finished pipe 22, and reduce the process cost to a certain extent. It can meet the manufacturing requirements of finished pipe 22 for different media.

[0074] Example 2:

[0075] In this specific embodiment, the molding method based on the continuous fiber reinforced thermoplastic composite pipe molding apparatus 100 includes the following steps:

[0076] (1) Soak a degreased cloth with cleaning agent and wipe the core mold 3 to ensure that there is no pollution or impurities on the contact surface between the molding device and the pipe; use gauze dipped in high temperature release agent to wipe the core mold 3 repeatedly more than three times; install the core mold 3 with an outer diameter of 100mm and a length of 1000mm in the installation sleeve 19.

[0077] (2) Take a roll of continuous fiber reinforced polyphenylene sulfide high-performance thermoplastic prepreg with a width of 100mm and a single-layer curing thickness of 0.15mm and fix it on the mandrel 58 of the winding mechanism 5. Adjust the winding mechanism 5 so that the prepreg is at +45° with the axis of the mandrel 3 and fix its end on the fixing ring 8.

[0078] (3) Rotate the core mold 3, control the tension of the winding mechanism 5 to 100N, and the winding speed to 30mm / s. The first layer is fixed with polyimide tape every 50mm. After the first layer is finished, cut the prepreg and fix the tail end with the fixing ring 8.

[0079] (4) The second layer of prepreg is wound at an angle of -45° and is also fixed by the fixing ring 8. An ultrasonic welding gun with a 10mm welding gun head 614 diameter is used to weld once along the winding direction of the prepreg at intervals of 10mm. At the same time, the polyimide tape used to fix the first layer of prepreg and the core mold 3 is removed. After the second layer is finished, the prepreg is cut off and the fixing ring 8 fixes the tail end.

[0080] (5) The third layer is +45°, the fourth layer is -45° and the same as step (4). The piling angles of the fifth to eighth layers are -45°, +45°, -45° and +45° respectively, and the steps are the same as (4).

[0081] (6) The preform and the core mold 3 are packaged in a vacuum bag, sealed with high-temperature putty strips, and vacuumed to -0.01MPa.

[0082] (7) Place the vacuum-packed preform into a high-temperature and high-pressure vessel, heat it to 330°C, 1MPa, and keep it at that temperature for 20 minutes.

[0083] (8) Take out the formed pipeline, remove the vacuum bag, and fix the ring 8.

[0084] (9) Fix the core mold 3 in the mounting sleeve 19 and eject it using the demolding mechanism 7 to obtain a continuous fiber-reinforced polyaryletherketone high-performance thermoplastic composite pipeline with an inner diameter of 100mm, a length of 1000mm, and a thickness of 1.2mm.

[0085] Example 3:

[0086] In this specific embodiment, the molding method based on the continuous fiber reinforced thermoplastic composite pipe molding apparatus 100 includes the following steps:

[0087] (1) Soak a degreased cloth with cleaning agent and wipe the core mold 3 to ensure that there is no pollution or impurities on the contact surface between the molding device and the pipe; use gauze dipped in high temperature release agent to wipe the core mold 3 repeatedly more than three times; install the core mold 3 with an outer diameter of 100mm and a length of 1000mm in the installation sleeve 19.

[0088] (2) Take a roll of continuous fiber-reinforced polyimide high-performance thermoplastic prepreg with a width of 100mm and a single-layer curing thickness of 0.15mm and fix it on the mandrel 58 of the winding mechanism 5. Adjust the winding mechanism 5 so that the prepreg is at +45° with the axis of the mandrel 3 and fix its end on the fixing ring 8.

[0089] (3) Rotate the core mold 3, control the tension of the winding mechanism 5 to 100N, and the winding speed to 30mm / s. The first layer is fixed with polyimide tape every 50mm. After the first layer is finished, cut the prepreg and fix the tail end with the fixing ring 8.

[0090] (4) The second layer of prepreg is wound at an angle of -45° and is also fixed by the fixing ring 8. An ultrasonic welding gun with a 10mm welding gun head 614 diameter is used to weld once along the winding direction of the prepreg at intervals of 10mm. At the same time, the polyimide tape used to fix the first layer of prepreg and the core mold 3 is removed. After the second layer is finished, the prepreg is cut off and the fixing ring 8 fixes the tail end.

[0091] (5) The third layer is +45°, the fourth layer is -45° and the same as step (4). The piling angles of the fifth to eighth layers are -45°, +45°, -45° and +45° respectively, and the steps are the same as (4).

[0092] (6) The preform and the core mold 3 are packaged in a vacuum bag, sealed with high-temperature putty strips, and vacuumed to -0.01MPa.

[0093] (7) Place the vacuum-packed preform into a high-temperature and high-pressure vessel, heat it to 350°C, 1MPa, and keep it at that temperature for 20 minutes.

[0094] (8) Take out the formed pipeline, remove the vacuum bag, and fix the ring 8.

[0095] (9) Fix the core mold 3 in the mounting sleeve 19 and eject it using the demolding mechanism 7 to obtain a continuous fiber-reinforced polyaryletherketone high-performance thermoplastic composite pipeline with an inner diameter of 100mm, a length of 1000mm, and a thickness of 1.2mm.

[0096] Example 4:

[0097] In this specific embodiment, the molding method based on the continuous fiber reinforced thermoplastic composite pipe molding apparatus 100 includes the following steps:

[0098] (1) Soak a degreased cloth with cleaning agent and wipe the core mold 3 to ensure that there is no pollution or impurities on the contact surface between the molding device and the pipe; use gauze dipped in high temperature release agent to wipe the core mold 3 repeatedly more than three times; install the core mold 3 with an outer diameter of 100mm and a length of 1000mm in the installation sleeve 19.

[0099] (2) Take a roll of continuous fiber reinforced polycarbonate high-performance thermoplastic prepreg with a width of 100mm and a single-layer curing thickness of 0.15mm and fix it on the mandrel 58 of the winding mechanism 5. Adjust the winding mechanism 5 so that the prepreg is at +45° with the axis of the mandrel 3 and fix its end on the fixing ring 8.

[0100] (3) Rotate the core mold 3, control the tension of the winding mechanism 5 to 100N, and the winding speed to 30mm / s. The first layer is fixed with polyimide tape every 50mm. After the first layer is finished, cut the prepreg and fix the tail end with the fixing ring 8.

[0101] (4) The second layer of prepreg is wound at an angle of -45° and is also fixed by the fixing ring 8. An ultrasonic welding gun with a 10mm welding gun head 614 diameter is used to weld once along the winding direction of the prepreg at intervals of 10mm. At the same time, the polyimide tape used to fix the first layer of prepreg and the core mold 3 is removed. After the second layer is finished, the prepreg is cut off and the fixing ring 8 fixes the tail end.

[0102] (5) The third layer is +45°, the fourth layer is -45° and the same as step (4). The piling angles of the fifth to eighth layers are -45°, +45°, -45° and +45° respectively, and the steps are the same as (4).

[0103] (6) The preform and the core mold 3 are packaged in a vacuum bag, sealed with high-temperature putty strips, and vacuumed to -0.01MPa.

[0104] (7) Place the vacuum-packed preform into a high-temperature and high-pressure vessel, heat it to 310℃, 1MPa, and keep it at that temperature for 20 minutes.

[0105] (8) Take out the formed pipeline, remove the vacuum bag, and fix the ring 8.

[0106] (9) Fix the core mold 3 in the mounting sleeve 19 and eject it using the demolding mechanism 7 to obtain a continuous fiber-reinforced polyaryletherketone high-performance thermoplastic composite pipeline with an inner diameter of 100mm, a length of 1000mm, and a thickness of 1.2mm.

[0107] Example 5:

[0108] In this specific embodiment, the molding method based on the continuous fiber reinforced thermoplastic composite pipe molding apparatus 100 includes the following steps:

[0109] (1) Soak a degreased cloth with cleaning agent and wipe the core mold 3 to ensure that there is no pollution or impurities on the contact surface between the molding device and the pipe; use gauze dipped in high temperature release agent to wipe the core mold 3 repeatedly more than three times; install the core mold 3 with an outer diameter of 100mm and a length of 1000mm in the installation sleeve 19.

[0110] (2) Take a roll of continuous fiber reinforced polyamide high-performance thermoplastic prepreg with a width of 100mm and a single-layer curing thickness of 0.15mm and fix it on the mandrel 58 of the winding mechanism 5. Adjust the winding mechanism 5 so that the prepreg is at +45° with the axis of the mandrel 3 and fix its end on the fixing ring 8.

[0111] (3) Rotate the core mold 3, control the tension of the winding mechanism 5 to 100N, and the winding speed to 30mm / s. The first layer is fixed with polyimide tape every 50mm. After the first layer is finished, cut the prepreg and fix the tail end with the fixing ring 8.

[0112] (4) The second layer of prepreg is wound at an angle of -45° and is also fixed by the fixing ring 8. An ultrasonic welding gun with a 10mm welding gun head 614 diameter is used to weld once along the winding direction of the prepreg at intervals of 10mm. At the same time, the polyimide tape used to fix the first layer of prepreg and the core mold 3 is removed. After the second layer is finished, the prepreg is cut off and the fixing ring 8 fixes the tail end.

[0113] (5) The third layer is +45°, the fourth layer is -45° and the same as step (4). The piling angles of the fifth to eighth layers are -45°, +45°, -45° and +45° respectively, and the steps are the same as (4).

[0114] (6) The preform and the core mold 3 are packaged in a vacuum bag, sealed with high-temperature putty strips, and vacuumed to -0.01MPa.

[0115] (7) Place the vacuum-packed preform into a high-temperature and high-pressure vessel, heat it to 250°C, 1MPa, and keep it at that temperature for 20 minutes.

[0116] (8) Take out the formed pipeline, remove the vacuum bag, and fix the ring 8.

[0117] (9) Fix the core mold 3 in the mounting sleeve 19 and eject it using the demolding mechanism 7 to obtain a continuous fiber-reinforced polyaryletherketone high-performance thermoplastic composite pipeline with an inner diameter of 100mm, a length of 1000mm, and a thickness of 1.2mm.

[0118] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas 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 continuous fiber-reinforced thermoplastic composite pipe forming device, characterized in that, The device includes a base, a fixed seat, a core mold, a guiding mechanism, a first driving mechanism, a second driving mechanism, a winding mechanism, a welding mechanism, a demolding mechanism, and two fixing rings. The base is slidably mounted on the guiding mechanism. The first driving mechanism drives the base to reciprocate along the guiding mechanism. The fixed seat is located on the upper part of the base. The second driving mechanism is located on the fixed seat. The core mold is detachably mounted on the second driving mechanism, which drives the core mold to rotate. The length direction of the core mold is consistent with the length direction of the guiding mechanism. The winding mechanism and the welding mechanism are respectively located on the core mold. On both sides of the mold, the winding mechanism includes a first support base, a first rotary drive component, a guide mold, a first support plate, a second rotary drive component, and a mandrel. The first rotary drive component is disposed at the lower end of the first support base, and the guide mold is disposed at the lower end of the first rotary drive component. A first support plate is disposed on one side of the guide mold, and the second rotary drive component is disposed on the first support plate. The mandrel is connected to the second rotary drive component and is used to wind the prepreg. A strip-shaped guide hole penetrating both ends is disposed in the middle of the guide mold, and the strip-shaped guide hole is used to guide the prepreg. The demolding mechanism includes... Two demolding assemblies are respectively disposed on both sides of the core mold. Each demolding assembly includes a linear drive component and a demolding module disposed at one end of the linear drive component. The two linear drive components are used to drive the two demolding modules to move towards each other or away from each other. When the two demolding modules move towards each other to dock, there is a gap between them and the core mold, and the demolding modules can limit the axial movement of the prepreg-made tubing on the core mold. The machine also includes a frame, which includes a base plate, a demolding bracket, a first column, and a second column. The guide mechanism is disposed on the base plate, and the first column and the second column are respectively fixed to the base plate. On both sides, the winding mechanism is located on the upper part of the first column, and the welding mechanism is located on the upper part of the second column. The demolding bracket includes a top plate and two vertical brackets. The lower ends of the two vertical brackets are respectively fixed to the two sides of the bottom plate, and the upper ends of the two vertical brackets are connected through the top plate. Each vertical bracket is provided with a demolding component. The winding mechanism also includes a guide roller and a second support plate. The second support plate is provided on the other side of the guide mold. The two ends of the guide roller are respectively rotatably mounted on the first support plate and the second support plate. The guide roller is located between the mandrel and the guide mold.

2. The continuous fiber-reinforced thermoplastic composite pipe forming apparatus according to claim 1, characterized in that, The first driving mechanism includes a rack, a gear, and a first driving motor. The length direction of the rack is consistent with the length direction of the guide mechanism. The first driving motor is disposed on the upper part of the base. The power output shaft of the first driving motor passes through the base, extends to the lower part, and is fixedly sleeved with the gear. The gear meshes with the rack.

3. The continuous fiber-reinforced thermoplastic composite pipe forming apparatus according to claim 2, characterized in that, The guiding mechanism includes two parallel guide rails, the rack is located between the two guide rails, and the lower surface of the base is provided with two strip-shaped grooves, each of which is slidably mounted on one of the guide rails.

4. The continuous fiber-reinforced thermoplastic composite pipe forming apparatus according to claim 1, characterized in that, The second drive mechanism includes a second drive motor, a mounting sleeve, and multiple limiting blocks. The second drive motor is disposed on one side of the fixed base. The power output shaft of the second drive motor passes through the fixed base and extends to the other side, where it is fixedly fitted with the mounting sleeve. The mounting sleeve has multiple insertion holes arranged circumferentially. The end of the core mold has multiple insertion slots arranged circumferentially. The core mold is used to fit into the mounting sleeve. Each limiting block is used to pass through one of the insertion holes and extend into one of the insertion slots.

5. The continuous fiber-reinforced thermoplastic composite pipe forming apparatus according to claim 1, characterized in that, The welding mechanism includes a second support base, a U-shaped bracket, a bottom platform, a support table, a rotary table, a rotating rod, a handle, a set screw, a drive assembly, multiple welding torches, multiple guide rods, and multiple sliders. The U-shaped bracket is fixed to the lower part of the second support base. Both ends of each guide rod are fixed to the U-shaped bracket. Each slider is slidably mounted on one of the guide rods. The bottom platform is fixed to multiple sliders. The drive assembly drives the bottom platform to reciprocate along the guide rods. The support table is fixed to the bottom platform. The two ends of the support table away from the second support base are respectively provided with a first support plate and a second support plate. The lower end of the rotary table is located between the first support plate and the second support plate. The rotating rod is fixedly sleeved in the rotary table. One end of the rotating rod is rotatably mounted on the first support plate via a bearing and fixed with the handle. The other end of the rotating rod is rotatably mounted on the second support plate via a bearing. The outer end of the second support plate is provided with a first threaded hole. The set screw is installed in the first threaded hole and can abut against the end face of the rotating rod. Each welding torch is detachably mounted on the rotary table.

6. The continuous fiber-reinforced thermoplastic composite pipe forming apparatus according to claim 5, characterized in that, The welding mechanism further includes a guide plate and multiple connecting columns. The guide plate is fixed to the side of the rotary table away from the second support base by the multiple connecting columns. The guide plate is provided with multiple guide holes. The welding torch includes a welding torch body, a welding torch head, an annular stop block, and a spring. The rotary table is provided with multiple second threaded holes. The outer wall of the welding torch body is provided with external threads. The rear end of the welding torch body is installed in the second threaded hole. The annular stop block is fixedly sleeved on the welding torch head. The rear end of the welding torch head is slidably installed in the welding torch body. The front end of the welding torch head extends to the outside through the guide hole. The spring is sleeved on the welding torch head, and the two ends of the spring are respectively connected to the welding torch body and the annular stop block.

7. The continuous fiber-reinforced thermoplastic composite pipe forming apparatus according to claim 5, characterized in that, The drive assembly includes a lead screw, a lead screw nut, and a third drive motor. The two ends of the lead screw are rotatably mounted on the U-shaped bracket. The lead screw nut is mounted on the lead screw and is fixedly connected to the bottom platform. The third drive motor is located on the outside of the U-shaped bracket and is used to drive the lead screw to rotate.

8. A molding method based on the continuous fiber reinforced thermoplastic composite pipe molding apparatus as described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Treat the core mold with a high-temperature resistant release agent and install the core mold on the second drive mechanism; Step 2: Wrap one end of the prepreg around the mandrel, and extend the other end of the prepreg through the strip guide hole to the outside of the guide mold. Adjust the guide mold by the first rotary drive component, thereby adjusting the angle between the prepreg and the mandrel. Fix the end of the prepreg to the mandrel using a fixing ring. At the same time, activate the second rotary drive component, the first drive mechanism, and the second drive mechanism. The second rotary drive component drives the mandrel to rotate and output the prepreg outward. The first drive mechanism drives the base, the fixing seat, and the mandrel to move along the guide mechanism. The second drive mechanism drives the mandrel to rotate, thereby causing the prepreg to wrap around the mandrel. Step 3: After the first layer of prepreg is wrapped around the core mold, it is fixed with tape. After the first layer of prepreg is wrapped, the tail is fixed with another fixing ring. Step 4: Before winding the prepreg, adjust the angle between the prepreg and the mandrel using the first rotary drive component. During the subsequent winding of the prepreg, the welding mechanism is used for welding. At the same time, the tape used to fix the first layer of prepreg and the mandrel is removed. After all layers are wound, the fixing ring is used to fix them to form a preform. Step 5: Remove the core mold and the preform from the second drive mechanism, package them in vacuum bags, seal them with high-temperature putty strips, and then vacuum them. Step 6: Place the preformed body after vacuuming into a high-temperature and high-pressure tank for heating and pressurization, and remove it after cooling to room temperature to obtain the finished pipeline. Step 7: Reinstall the core mold onto the second drive mechanism, placing the core mold and the finished pipe between the two demolding components. Remove the fixing rings at both ends. The two linear drive components drive the two demolding modules to move towards each other, without contacting the core mold. Then, the first drive mechanism drives the base, fixing seat, and core mold to move along the guide mechanism. Under the blocking action of the two demolding modules, the finished pipe does not move, thereby separating the core mold from the finished pipe, and the finished pipe can be removed.

Images