Prepreg pultrusion hot forming device

Abstract

The utility model discloses a prepreg pultrusion hot forming device, which belongs to the technical field of prepreg processing, and comprises an open-close type mold component and a hot rolling component, a heating channel with the height not less than the initial thickness of prepreg is arranged in the open-close type mold component, and the hot rolling component is arranged in the open-close type mold component. The hot rolling assembly comprises an upper heating roller, a lower heating roller, an upper roller support and a lower roller support, the upper roller support is slidably connected with guide columns fixed to the two sides of the top of the lower roller support through sliding blocks, and a roller gap adjusting mechanism is arranged between the upper roller support and the lower roller support. A rotating motor for driving the lower heating roller to rotate is installed on the lower roller support, a driven gear and a driving gear are fixed to a mandrel of the upper heating roller and a mandrel of the lower heating roller respectively, and the driven gear and the driving gear are in transmission connection through a gear clearance compensation mechanism. Scraper assemblies are arranged on the upper roller support and the lower roller support respectively. According to the utility model, the self-cleaning of the device is realized, and the product quality and the production efficiency are ensured.

Description

Technical Field

[0001] This utility model relates to the field of prepreg processing technology, and in particular to a prepreg pultrusion thermoforming apparatus. Background Technology

[0002] In the pultrusion process, the prepreg is drawn through a thermoforming device and, after being heated and extruded, is formed into a prepreg tape product of a specified thickness.

[0003] Existing thermoforming equipment uses an openable mold structure consisting of an upper and lower mold platen. The upper and lower mold plates are hinged on both sides at the mold entrance. When the upper mold platen closes onto the lower mold platen, a pultrusion channel that gradually narrows from the entrance to the exit is formed inside the mold. However, during the pultrusion process of the prepreg in the mold, burrs such as broken yarns are generated. These burrs accumulate at the narrow mold exit and adhere to the upper and lower mold plates at high temperatures. The carbonized burrs can scratch the surface of the formed prepreg tape, thus affecting product quality. Stopping the machine to clean the mold would affect production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a prepreg pultrusion thermoforming device that enables mold self-cleaning and ensures product quality and production efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A prepreg pultrusion thermoforming apparatus includes an openable die assembly and a hot roll forming assembly arranged side-by-side along the prepreg feeding direction. The openable die assembly has a heating channel with a height not less than the initial thickness of the prepreg. The hot roll forming assembly includes an upper heating roller, a lower heating roller, an upper roller support rotatably connected to both sides of the upper heating roller, and a lower roller support rotatably connected to both sides of the lower heating roller. The upper roller support is slidably connected to guide posts fixed on both sides of the top of the lower roller support via a slider. A roller gap adjustment mechanism is provided between the upper roller support and the lower roller support. A rotary motor for driving the lower heating roller is installed on the lower roller support. A driven gear and a driving gear are respectively fixed on the spindles of the upper heating roller and the lower heating roller. The driven gear and the driving gear are connected by a gear gap compensation mechanism. A scraper assembly is provided on the upper roller support and the lower roller support respectively. The device is configured with two parts: an openable mold assembly and a hot roller pressing assembly. The openable mold assembly only heats the prepreg material. The thickness of the prepreg tape to be pultruded is controlled by the hot roller pressing assembly through a roller gap adjustment mechanism. Therefore, the residue in the prepreg material will not accumulate in the mold. The residue will adhere to the roller surface of the hot roller pressing assembly. The rotating motor drives the lower heating roller to rotate at regular intervals. Under the transmission of the driven gear and the drive gear, the upper heating roller rotates together, so that the roller surface with the residue is rotated away from the prepreg tape to be formed. This ensures that the formed prepreg tape is always in contact with the clean roller surface of the heating roller. At the same time, the scraper assembly cleans the roller surface with the residue to ensure product quality and production efficiency.

[0007] The roller gap adjustment mechanism includes a lead screw, an upper wedge block, and a lower wedge block. One end of the lead screw passes through two guide columns in sequence and is connected to the lower roller support via a bearing seat. The other end of the lead screw is connected to a drive component. The upper wedge block is fixed at the bottom of the upper roller support. The middle part of the lower wedge block is engaged with the lead screw via a nut component, and the upper and lower end faces of the lower wedge block slide in contact with the end faces of the upper wedge block and the lower roller support, respectively.

[0008] The scraper assembly includes an upper scraper fixed on the upper roller support and a lower scraper fixed on the lower roller support. Both the upper scraper and the lower scraper are located near the side of the opening and closing mold assembly.

[0009] The opening and closing mold assembly includes an upper template and a lower template, a first frame fixed on both sides of the upper template, and a second frame fixed on both sides of the lower template. The rear end of the first frame is rotatably connected to the second frame via a rotating shaft. A servo electric cylinder is provided on the upper template. The motor base of the servo electric cylinder is hinged to a mounting seat fixed at the top of the rear end of the second frame. The output shaft of the servo electric cylinder is hinged to a connecting seat fixed at the front end of the second frame.

[0010] The lower mold has a transition guide roller at its rear end. The transition guide roller is rotatably connected to the second frame via a bearing. The roller surface of the transition guide roller and the roller surface of the lower heating roller are flush with the upper surface of the lower mold. This allows the prepreg to smoothly transition from the heating channel of the mold to the roller surface of the heating roller, avoiding extrusion contact between the prepreg and the surfaces of the upper / lower mold, and thus preventing residue from forming in the heating channel.

[0011] The gear backlash compensation mechanism includes a fixed gear meshing with the drive gear and a swing gear meshing with the driven gear. The fixed gear is rotatably centered relative to the lower roller support. The swing gear meshes with the fixed gear for transmission, and the center of the swing gear is movably connected to the center of the fixed gear via a swing arm. The swing gear has an adjustment path centered on the center of the fixed gear.

[0012] A fixed seat is fixed to the outside of the lower roller support, and an adjusting seat is fixed to the outside of the upper roller support. The adjusting seat has an arc-shaped groove adapted to the adjusting path. The two ends of the swing arm are rotatably connected to the swing gear and the fixed gear respectively via a first shoulder bolt and a second shoulder bolt. The head of the first shoulder bolt slides in cooperation with the arc-shaped groove. The threaded part of the first shoulder bolt passes through the swing arm and is connected to the first nut. The threaded part of the second shoulder bolt passes through the fixed seat and is connected to the second nut.

[0013] The driving component includes a drive motor and a gear mechanism. The lead screw is a ball screw. The drive motor is fixed on the lower roller support. The output shaft of the drive motor is connected to the gear mechanism. The output shaft of the gear mechanism is connected to the ball screw via a coupling.

[0014] The upper heating roller and the lower heating roller have hollow cores. An electric heating element is placed inside the hollow core, and a conductive slip ring is installed on the outside of the hollow core. The inner wire of the conductive slip ring passes through the hollow core and is electrically connected to the electric heating element.

[0015] This utility model has the following beneficial effects:

[0016] This invention comprises two parts: an openable mold assembly and a hot roller pressing assembly. The openable mold assembly only heats the prepreg material. The hot roller pressing assembly controls the thickness of the prepreg tape to be pultruded via a roller gap adjustment mechanism. Therefore, residues in the prepreg material do not accumulate in the mold. Instead, the residues adhere to the roller surface of the hot roller pressing assembly. A rotating motor drives the lower heating roller to rotate at regular intervals. Under the transmission of the driven gear and the drive gear, the upper heating roller rotates together, causing the roller surface with the residues to rotate away from the prepreg tape being formed. This ensures that the formed prepreg tape is always in contact with the clean roller surface of the heating roller. At the same time, a scraper assembly cleans the roller surface with the residues to ensure product quality and production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0020] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0021] Figure 4 for Figure 1 A magnified view of part A in the image;

[0022] Figure 5 To and Figure 4 Corresponding partial sectional view;

[0023] Figure 6 This is a schematic diagram showing the connection between the upper wedge block and the lower wedge block in this utility model;

[0024] Figure 7 This is a schematic diagram of another embodiment of the opening and closing mold assembly of this utility model.

[0025] 1. Upper template; 101. First frame; 102. Connecting seat; 2. Lower template; 201. Second frame; 202. Mounting seat; 3. Servo electric cylinder; 4. Rotating shaft; 5. Transition guide roller; 6. Upper heating roller; 601. Upper roller support; 6011. Adjusting seat; 602. Slider; 603. Driven gear; 7. Lower heating roller; 701. Lower roller support; 7011. Fixed seat; 702. Guide column; 703. Drive gear; 801. Drive motor; 802. Gear mechanism; 80 3. Lead screw; 804. Bearing housing; 805. Lower wedge block; 8051. Nut; 8052. Rolling plate; 8053. Roller; 806. Upper wedge block; 901. Swing gear; 902. Fixed gear; 903. Swing arm; 904. First shoulder bolt; 905. Second shoulder bolt; 906. First nut; 907. Second nut; 908. Arc groove; 10. Rotary motor; 11. Upper scraper; 12. Lower scraper; 13. Conductive slip ring; 14. Heating element. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] like Figure 1 and Figure 2As shown, this utility model provides a prepreg pultrusion thermoforming apparatus, including an openable mold assembly and a hot roller pressing assembly arranged side by side along the prepreg feeding direction. The openable mold assembly has a heating channel with a height not less than the initial thickness of the prepreg. The hot roller pressing assembly includes an upper heating roller 6, a lower heating roller 7, an upper roller support 601 rotatably connected to both sides of the upper heating roller 6, and a lower roller support 701 rotatably connected to both sides of the lower heating roller 7. The upper roller support 601 is slidably connected to guide posts 702 fixed on both sides of the top of the lower roller support 701 via a slider 602. The rolling gap between the upper heating roller 6 and the lower heating roller 7 corresponds to the heating channel in the openable mold assembly. The prepreg to be processed first passes through the heating channel to heat and melt the resin on the surface of the prepreg, and then passes through the roller gap of the hot roller pressing assembly for extrusion molding. A roller gap adjustment mechanism is provided between the upper roller support 601 and the lower roller support 701 to meet the molding needs of prepreg tapes of different sizes. A drive mechanism is installed on the lower roller support 701. A rotary motor 10 drives the lower heating roller 7. A driven gear 603 and a drive gear 703 are fixed on the spindles of the upper heating roller 6 and the lower heating roller 7, respectively. The driven gear 603 and the drive gear 703 are connected by a gear backlash compensation mechanism to adapt to the adjustment size of the roller backlash adjustment mechanism. Scraper assemblies are provided on the upper roller support 601 and the lower roller support 701, respectively. Since the openable mold assembly only completes the heating process for the prepreg, the residue in the prepreg will not accumulate in the mold. The residue will adhere to the roller surface of the hot roller pressing assembly used for extrusion molding. The rotary motor 10 drives the lower heating roller 7 to rotate at regular intervals. Under the transmission of the driven gear 603 and the drive gear 703, the upper heating roller 6 is driven to rotate together, so that the roller surface with the residue rotates away from the prepreg tape being formed, so that the formed prepreg tape is always in contact with the clean roller surface of the heating roller. At the same time, the scraper assembly cleans the roller surface with the residue to ensure product quality and production efficiency.

[0031] like Figure 3 As shown, multiple heating elements 14 are arranged along the length direction inside the upper template 1 and the lower template 2 to ensure the heating performance of the templates; as Figure 2 and Figure 3 As shown, the mandrels of the upper heating roller 6 and the lower heating roller 7 are hollow mandrels. An electric heating element 14 is placed inside the hollow mandrel, and a conductive slip ring 13 is installed on the outside of the hollow mandrel. The inner wire of the conductive slip ring 13 passes through the hollow mandrel and is electrically connected to the electric heating element 14. It is worth noting that the inner ring of the conductive slip ring 13 is fixedly connected to the outside of the mandrel, and the outer ring of the conductive slip ring 13 is fixedly connected to the outside of the corresponding upper roller support 601 and lower roller support 701.

[0032] like Figure 6As shown, the roller gap adjustment mechanism includes a lead screw 803, an upper wedge block 806, and a lower wedge block 805. One end of the lead screw 803 passes through two guide posts 702 in sequence and is connected to the lower roller support 701 via a bearing seat 804. The other end of the lead screw 803 is connected to a driving component. The upper wedge block 806 is fixed to the bottom of the upper roller support 601. The middle part of the lower wedge block 805 is engaged with the lead screw 803 via a nut 8051, and the upper and lower end faces of the lower wedge block 805 slide in contact with the end faces of the upper wedge block 806 and the lower roller support 701, respectively. Specifically, the driving component includes a drive motor 801 and a gear mechanism 802. The lead screw 803 is a ball screw 803. The drive motor 801 is fixed on the lower roller support 701. The output shaft of the drive motor 801 is connected to the gear mechanism 802, and the output shaft of the gear mechanism 802 is connected to the ball screw 803 via a coupling. The use of ball screw 803 allows it to be used in conjunction with a reducer with a larger speed ratio, thereby achieving a lower speed of screw 803 at a certain motor speed, and higher precision in the adjustment of the lower wedge block 805 and the upper wedge block 806. To ensure the sliding contact effect between the upper and lower end faces of the lower wedge block 805 and the upper wedge block 806 and the lower roller support 701 during roller gap adjustment, and to reduce the adjustment resistance of the lower wedge block 805, a rolling plate 8052 is held between the lower wedge block 805 and the upper wedge block 806, and between the lower wedge block 805 and the lower roller support 701. The rolling plate 8052 has multiple rollers 8053 arranged along the moving direction of the lower wedge block 805, and the lower wedge block 805 slides in contact with the upper wedge block 806 and the lower roller support 701 via the rollers 8053.

[0033] The scraper assembly includes an upper scraper 11 fixed on the upper roller support 601 and a lower scraper 12 fixed on the lower roller support 701. Both the upper scraper 11 and the lower scraper 12 are positioned close to the side of the opening / closing mold assembly. Specifically, as shown... Figure 3 As shown, both the upper scraper 11 and the lower scraper 12 are equipped with scraper seats on both sides. The upper scraper 11 is fixed to the inner side of the upper roller support 601 via the scraper seat. At this time, the blade tip of the upper scraper 11 points forward toward the roller surface of the upper heating roller 6. The upper scraper 11, the upper roller support 601, and the roller surface of the upper heating roller 6 form an upward-opening upper collection area, which is used to collect the prepreg residue cleaned off by the upper scraper 11 when the upper heating roller 6 rotates. Similarly, the lower scraper 12 is fixed to the inner side of the lower roller support 701 via the scraper seat. At this time, the blade tip of the lower scraper 12 points forward toward the roller surface of the lower heating roller 7. The lower scraper 12, the lower roller support 701, and the roller surface of the lower heating roller 7 form a downward-opening lower collection area, which is used to collect the prepreg residue cleaned off by the lower scraper 12 when the lower heating roller 7 rotates.

[0034] The opening and closing mold assembly includes an upper mold plate 1 and a lower mold plate 2, respectively, a first frame 101 fixed on both sides of the upper mold plate 1, and a second frame 201 fixed on both sides of the lower mold plate 2. The rear end of the first frame 101 is rotatably connected to the second frame 201 via a rotating shaft 4. A servo cylinder 3 is provided on the upper mold plate 1. The motor base of the servo cylinder 3 is hinged to a mounting seat 202 fixed to the top of the rear end of the second frame 201. The output shaft of the servo cylinder 3 is hinged to a connecting seat 102 fixed to the front end of the second frame 201. Specifically, as shown... Figure 2 As shown, the first frame 101 includes two L-shaped plates fixed to both sides of the upper template 1. The vertical sections of the L-shaped plates face downwards to form the rear end of the first frame 101. The second frame 201 includes two mounting strips fixed to both sides of the lower template 2, a base plate fixed below the mounting strips, and mold side plates fixed to both sides of the base plate. The rotating shaft 4 passes through the vertical section of the L-shaped plate and is rotatably connected to the outer mold side plate via a bearing seat 804. The mold side plate extends upwards near the rotating shaft 4 to form the rear end of the second frame 201. The bottom of the mounting seat 202 is fixed to the top of the aforementioned extension section, and the connecting seat 102 is fixed to the front side of the horizontal section of the L-shaped plate. The servo electric cylinder 3 drives the output shaft to retract or extend axially, thereby driving the upper template 1 to rotate around the rotating shaft 4, completing the opening and closing operation between it and the lower template 2. In other embodiments, such as Figure 7 As shown, the upper template 1 moves vertically to complete the opening and closing operation with the lower template 2. That is, there are four servo cylinders 3, which are distributed in pairs on both sides of the second frame 201. The motor base of the servo cylinder 3 is fixed on the second frame 201. The output shaft of the servo cylinder 3 extends upward and is fixedly connected to the first frame 101 on both sides of the upper template 1. The output shaft is driven to retract and extend through the servo cylinder 3, which drives the upper template 1 to move in the vertical direction.

[0035] like Figure 4 As shown, the gear backlash compensation mechanism includes a fixed gear 902 meshing with the drive gear 703 and a swing gear 901 meshing with the driven gear 603. The fixed gear 902 is rotatably centered relative to the lower roller support 701. The swing gear 901 meshes with the fixed gear 902 for transmission, and the center of the swing gear 901 is movably connected to the center of the fixed gear 902 via a swing arm 903. The swing gear 901 has an adjustment path centered on the center of the fixed gear 902. Further, as... Figure 5As shown, a fixed seat 7011 is fixed to the outside of the lower roller support 701, and an adjusting seat 6011 is fixed to the outside of the upper roller support 601. An arc-shaped groove 908 adapted to the adjusting path is provided on the adjusting seat 6011. The two ends of the swing arm 903 are rotatably connected to the swing gear 901 and the fixed gear 902 via a first shoulder bolt 904 and a second shoulder bolt 905, respectively. The head of the first shoulder bolt 904 slides in cooperation with the arc-shaped groove 908. The threaded part of the first shoulder bolt 904 passes through the swing arm 903 and is connected to the first nut 906. The threaded part of the second shoulder bolt 905 passes through the fixed seat 7011 and is connected to the second nut 907. When adjusting the roller gap size using the roller gap adjustment mechanism, loosen the first nut 906. At this time, the swing gear 901 drives the first shoulder bolt 904 to move with the swing arm 903 on the arc groove 908 with the second shoulder bolt 905 as the axis, thereby adapting to the roller gap adjustment size, so as to ensure that the driven gear 603 is meshed and transmitted through the swing gear 901, the fixed gear 902 and the drive gear 703 in sequence.

[0036] like Figure 2 and Figure 3 As shown, in order to smoothly transition the prepreg from the heating channel of the mold to the roller surface of the heating roller, the rear end of the lower template 2 is provided with a transition guide roller 5. The transition guide roller 5 is rotatably connected to the second frame 201 via a bearing. The roller surface of the transition guide roller 5 and the roller surface of the lower heating roller 7 are flush with the upper surface of the lower template 2.

[0037] When implementing the above technical solution, the openable mold assembly is in the open state, and there is a gap between the upper and lower rollers that is not less than the initial thickness of the prepreg. The prepreg enters the mold through the transition guide roller 5 and is spread sequentially on the lower template 2 and the lower heating roller 7. The gap between the heating rollers is adjusted according to the width of the prepreg tape produced. Specifically, the drive motor 801 drives the ball screw 803 to rotate forward, and the lower wedge block 805 moves in the direction close to the drive motor 801 with the cooperation of the nut 8051. Figure 6As shown, since the upper end face of the lower wedge block 805 is inclined downward in a direction away from the drive motor 801, the gap between the heating rollers becomes smaller. At the same time, by tightening and loosening the first nut 906, the position of the first shoulder bolt 904 in the arc groove 908 is adjusted so that the swing gear 901 and the driven gear 603 remain engaged. The servo cylinder 3 is driven to extend, and the upper template 1 flips downward and covers the lower template 2. At this time, a heating channel of constant height is formed in the mold for heating and melting the resin on the prepreg. Under the traction action of the traction mechanism, the prepreg is pulled out of the heating roller to form a prepreg strip. Based on the formation of residues in the prepreg inferred from the prior art, During this process, the rotary motor 10 is set to rotate at a fixed time and angle via a PLC controller, for example, rotating 30° every 15 minutes. The rotation direction of the rotary motor 10 is the same as the feeding direction of the prepreg material. This ensures that the roller surface in contact with the prepreg tape remains smooth during the continuous molding process. When the roller surface with residue rotates to the upper scraper 11 / lower scraper 12, the upper scraper 11 / lower scraper 12 cleans the roller surface of the upper heating roller 6 / lower heating roller 7, thereby achieving the self-cleaning function of the mold. Subsequently, it is only necessary to collect the residue in the upper and lower collection areas, ensuring production efficiency. Throughout the entire processing, the surface of the prepreg tape is free of scratches, ensuring product quality.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A prepreg pultrusion thermoforming apparatus, characterized in that, The device includes an openable mold assembly and a hot roller pressing assembly arranged side-by-side along the prepreg feeding direction. The openable mold assembly has a heating channel with a height not less than the initial thickness of the prepreg. The hot roller pressing assembly includes an upper heating roller, a lower heating roller, an upper roller support rotatably connected to both sides of the upper heating roller, and a lower roller support rotatably connected to both sides of the lower heating roller. The upper roller support is slidably connected to guide posts fixed on both sides of the top of the lower roller support via a slider. A roller gap adjustment mechanism is provided between the upper roller support and the lower roller support. A rotary motor for driving the lower heating roller is installed on the lower roller support. A driven gear and a drive gear are respectively fixed on the spindles of the upper heating roller and the lower heating roller. The driven gear and the drive gear are connected by a gear gap compensation mechanism. A scraper assembly is provided on the upper roller support and the lower roller support respectively.

2. The prepreg pultrusion thermoforming apparatus according to claim 1, characterized in that, The roller gap adjustment mechanism includes a lead screw, an upper wedge block, and a lower wedge block. One end of the lead screw passes through two guide columns in sequence and is connected to the lower roller support via a bearing seat. The other end of the lead screw is connected to a drive component. The upper wedge block is fixed at the bottom of the upper roller support. The middle part of the lower wedge block is engaged with the lead screw via a nut component, and the upper and lower end faces of the lower wedge block slide in contact with the end faces of the upper wedge block and the lower roller support, respectively.

3. The prepreg pultrusion thermoforming apparatus according to claim 1, characterized in that, The scraper assembly includes an upper scraper fixed on the upper roller support and a lower scraper fixed on the lower roller support. Both the upper scraper and the lower scraper are located near the side of the opening and closing mold assembly.

4. The prepreg pultrusion thermoforming apparatus according to claim 1, characterized in that, The opening and closing mold assembly includes an upper template and a lower template, a first frame fixed on both sides of the upper template, and a second frame fixed on both sides of the lower template. The rear end of the first frame is rotatably connected to the second frame via a rotating shaft. A servo electric cylinder is provided on the upper template. The motor base of the servo electric cylinder is hinged to a mounting seat fixed at the top of the rear end of the second frame. The output shaft of the servo electric cylinder is hinged to a connecting seat fixed at the front end of the second frame.

5. The prepreg pultrusion thermoforming apparatus according to claim 4, characterized in that, The lower template is provided with a transition guide roller at its rear end. The transition guide roller is rotatably connected to the second frame via a bearing. The roller surface of the transition guide roller and the roller surface of the lower heating roller are flush with the upper surface of the lower template.

6. The prepreg pultrusion thermoforming apparatus according to any one of claims 1-4, characterized in that, The gear backlash compensation mechanism includes a fixed gear meshing with the drive gear and a swing gear meshing with the driven gear. The fixed gear is rotatably centered relative to the lower roller support. The swing gear meshes with the fixed gear for transmission, and the center of the swing gear is movably connected to the center of the fixed gear via a swing arm. The swing gear has an adjustment path centered on the center of the fixed gear.

7. The prepreg pultrusion thermoforming apparatus according to claim 6, characterized in that, A fixed seat is fixed to the outside of the lower roller support, and an adjusting seat is fixed to the outside of the upper roller support. The adjusting seat has an arc-shaped groove adapted to the adjusting path. The two ends of the swing arm are rotatably connected to the swing gear and the fixed gear respectively via a first shoulder bolt and a second shoulder bolt. The head of the first shoulder bolt slides in cooperation with the arc-shaped groove. The threaded part of the first shoulder bolt passes through the swing arm and is connected to the first nut. The threaded part of the second shoulder bolt passes through the fixed seat and is connected to the second nut.

8. The prepreg pultrusion thermoforming apparatus according to claim 2, characterized in that, The driving component includes a drive motor and a gear mechanism. The lead screw is a ball screw. The drive motor is fixed on the lower roller support. The output shaft of the drive motor is connected to the gear mechanism. The output shaft of the gear mechanism is connected to the ball screw via a coupling.

9. The prepreg pultrusion thermoforming apparatus according to any one of claims 1-4, characterized in that, The upper heating roller and the lower heating roller have hollow cores. An electric heating element is placed inside the hollow core, and a conductive slip ring is installed on the outside of the hollow core. The inner wire of the conductive slip ring passes through the hollow core and is electrically connected to the electric heating element.

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