Continuous fiber ultrathin prepreg tape production equipment

Abstract

The invention relates to continuous fiber ultrathin prepreg tape production equipment. The continuous fiber ultrathin prepreg tape production equipment comprises an unwinding mechanism, a limiting mechanism, a desizing mechanism, a yarn spreading mechanism, a dipping mechanism, at least three temperature control rolling mechanisms, a traction mechanism and a winding mechanism which are arranged in sequence. The fiber yarn sequentially penetrates through the mechanisms from the unwinding mechanism to be finally wound. The core improvement is that at least three groups of temperature control rolling mechanisms with independent functions and gradient temperature distribution are arranged to sequentially form a low-temperature pre-softening section, a high-temperature forming section and a medium-temperature molding section. Through the cooperation of segmented gradient temperature control and multi-stage rolling, the prepreg tape is gradually compacted, the ultrathin thickness specification is achieved, and the thickness uniformity, the surface flatness and the fiber-resin combination effect are remarkably improved. And the temperature of each group of temperature control rolling mechanisms can be independently adjusted, so that the temperature control rolling mechanisms can adapt to different fiber materials and thermoplastic resins, rolling is completed under the optimal process condition, and the quality stability and the performance consistency of the prepreg tape are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of composite material manufacturing equipment technology, and in particular to a continuous fiber ultrathin prepreg tape production equipment. Background Technology

[0002] Continuous fiber reinforced thermoplastic prepreg tape, with its high strength, lightweight, and high-temperature resistance, has become a core material in aerospace, new energy, and automotive fields. Currently, industrial-grade prepreg tapes are generally quite thick, which limits further improvements in composite material performance. In contrast, ultra-thin prepreg tapes, laminated through multi-layer layup and pressing, offer significant advantages in mechanical properties, lightweight potential, high strain folding adaptability, and the freedom of integrated structural and functional design, providing more flexible and economical design solutions for aerospace and other fields.

[0003] However, equipment capable of meeting the stable and efficient production requirements of ultra-thin specifications is extremely scarce, lagging far behind the growth of market size, resulting in product supply shortages and restricting the development of related industries. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention provides a continuous fiber ultrathin prepreg tape production device, aiming to address the scarcity of ultrathin prepreg tape production equipment in related technologies.

[0005] This invention provides a continuous fiber prepreg tape production equipment, including an unwinding mechanism, a limiting mechanism, a desizing mechanism, a yarn spreading mechanism, a sizing mechanism, at least three temperature-controlled roller pressing mechanisms, a traction mechanism, and a winding mechanism. The free end of the fiber yarn wound on the unwinding mechanism passes sequentially through the limiting mechanism, the desizing mechanism, the yarn spreading mechanism, the sizing mechanism, the multiple temperature-controlled roller pressing mechanisms, and the traction mechanism, and is finally wound on the winding mechanism.

[0006] The continuous fiber ultrathin prepreg tape production equipment provided by the present invention further includes a frame, wherein the unwinding mechanism, the limiting mechanism, the desizing mechanism, the yarn spreading mechanism, the sizing mechanism, the temperature-controlled roller pressing mechanism, the traction mechanism, and the winding mechanism are all miniaturized mechanisms, and the unwinding mechanism, the limiting mechanism, the desizing mechanism, the yarn spreading mechanism, the sizing mechanism, the temperature-controlled roller pressing mechanism, the traction mechanism, and the winding mechanism are arranged in at least two layers on the frame.

[0007] In the continuous fiber ultrathin prepreg tape production equipment provided by the present invention, at least one unwinding mechanism is provided.

[0008] According to the continuous fiber ultrathin prepreg tape production equipment provided by the present invention, the limiting mechanism includes: A horizontal limiting roller assembly includes two vertical limiting guide rollers. The distance between the two vertical limiting guide rollers is adjustable. The fiber yarn passes through the middle area of ​​the two vertical limiting guide rollers, and the fiber yarns located on both sides in the horizontal direction contact the adjacent vertical limiting guide rollers. The vertical limiting roller assembly includes two horizontal limiting guide rollers with an adjustable spacing between them. The fiber yarn passes through the middle area of ​​the two horizontal limiting guide rollers, and the top and bottom of the fiber yarn are in contact with the corresponding horizontal limiting guide rollers.

[0009] According to the continuous fiber ultrathin prepreg tape production equipment provided by the present invention, the desizing mechanism includes: An oven, wherein a yarn inlet and a yarn outlet are respectively provided on both sides along the extension direction of the fiber yarn, and a heating device is provided inside the oven; The guide roller assembly includes an inlet guide roller and an outlet guide roller. The contact surface between the inlet guide roller and the fiber yarn, the center surface of the yarn inlet, the center surface of the yarn outlet, and the contact surface between the outlet guide roller and the fiber yarn are located on the same plane.

[0010] According to the continuous fiber ultrathin prepreg tape production equipment provided by the present invention, the yarn spreading mechanism includes two friction guide rollers and a vibration assembly. The vibration assembly includes a first linear telescopic mechanism and a yarn spreading guide roller. The yarn spreading guide roller is connected to the telescopic end of the first linear telescopic mechanism, and the axis of the yarn spreading guide roller is perpendicular to the telescopic direction of the first linear telescopic mechanism. The two friction guide rollers and the yarn spreading guide roller form a triangle. The telescopic direction of the first linear telescopic mechanism is perpendicular to the plane containing the axes of the two friction guide rollers. The first linear telescopic mechanism drives the yarn spreading guide roller to reciprocate.

[0011] According to the continuous fiber ultrathin prepreg tape production equipment provided by the present invention, the impregnation mechanism includes at least one, and when the number of the impregnation mechanisms is greater than or equal to two, the impregnation mechanisms are distributed along the extension direction of the fiber yarn, and each of the impregnation mechanisms includes: A pre-impregnation tank, the top of which is open, and a stirring device is provided inside the pre-impregnation tank; At least one first guide roller is disposed at the bottom of the inner side of the prepreg tank, and the fiber yarn passes through the bottom of the first guide roller; The slurry extrusion mechanism includes a second guide roller, an extrusion guide roller, and a distance adjustment mechanism. The second guide roller is arranged parallel to the extrusion guide roller, and the distance adjustment mechanism is connected to the extrusion guide roller. The distance adjustment mechanism is used to adjust the distance between the extrusion guide roller and the second guide roller.

[0012] According to the continuous fiber ultrathin prepreg tape production equipment provided by the present invention, the temperature control roller pressing mechanism includes a first fixed guide roller, a first movable guide roller and a third linear telescopic mechanism. The first fixed guide roller is parallel to the axis of the first movable guide roller. The first movable guide roller is driven to the telescopic end of the third linear telescopic mechanism. The third linear telescopic mechanism is used to drive the first movable guide roller to approach or move away from the first fixed guide roller in a direction perpendicular to the axis of the first fixed guide roller.

[0013] According to the continuous fiber ultrathin prepreg tape production equipment provided by the present invention, the traction mechanism includes a second fixed guide roller, a second movable guide roller, and a fourth linear telescopic mechanism. The second fixed guide roller is parallel to the axis of the second movable guide roller. The second movable guide roller is driven to the telescopic end of the fourth linear telescopic mechanism. The fourth linear telescopic mechanism is used to drive the second movable guide roller to approach or move away from the second fixed guide roller in a direction perpendicular to the axis of the second fixed guide roller. Friction material is provided on the outer peripheral surfaces of the second fixed guide roller and the second movable guide roller.

[0014] According to the continuous fiber ultrathin prepreg tape production equipment provided by the present invention, the winding mechanism includes a winding guide roller, a guide roller driving device, and a wire guide. The guide roller driving device is connected to the winding guide roller in a transmission manner, and the wire guide is disposed on the upstream side of the winding guide roller.

[0015] The present invention has the following advantages due to the adoption of the above technical solutions: The continuous fiber prepreg tape production equipment provided by this invention includes an unwinding mechanism, a limiting mechanism, a desizing mechanism, a yarn spreading mechanism, a sizing mechanism, at least three temperature-controlled roller pressing mechanisms, a traction mechanism, and a winding mechanism. The free end of the fiber yarn wound on the unwinding mechanism passes sequentially through the limiting mechanism, the desizing mechanism, the yarn spreading mechanism, the sizing mechanism, the multiple temperature-controlled roller pressing mechanisms, and the traction mechanism, and is finally wound onto the winding mechanism. Compared with traditional prepreg tape forming equipment, the continuous fiber ultra-thin prepreg tape production equipment provided by this invention is equipped with at least three sets of temperature-controlled roller pressing mechanisms. The temperature of each set of temperature-controlled roller pressing mechanisms is gradient-distributed and functionally independent, namely a low-temperature pre-softening section, a high-temperature forming section, and a medium-temperature molding section. Through multiple roller pressings, the prepreg tape is gradually compacted to achieve the ultra-thin thickness specification, while improving thickness uniformity, surface smoothness, and strengthening the bonding effect between fiber and resin. The temperature of each set of temperature-controlled roller pressing mechanisms is adjustable, which can be adapted to different fiber materials and thermoplastic resins, ensuring that the roller pressing is completed under optimal process conditions, and guaranteeing stable quality and consistent performance of the prepreg tape. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a continuous fiber ultrathin prepreg tape production equipment provided in an embodiment of the present invention.

[0018] Figure label: 100: Frame; 110: Electrical box; 120: Horizontal mounting plate; 130: Vertical mounting plate; 200: Unwinding mechanism; 300: Limiting mechanism; 310: Vertical limiting guide roller; 320: Horizontal limiting guide roller; 400: Desizing mechanism; 410: Drying oven; 420: Inlet guide roller; 430: Outlet guide roller; 500: Yarn spreading mechanism; 510: Friction guide roller; 520: Yarn spreading guide roller; 530: First linear telescopic mechanism; 600: Impregnation mechanism; 610: Pre-impregnation 620: Second guide roller; 630: Extrusion guide roller; 640: Distance adjustment mechanism; 900: Temperature control roller pressing mechanism; 910: First fixed guide roller; 920: First moving guide roller; 930: Third linear telescopic mechanism; 1000: Traction mechanism; 1010: Second fixed guide roller; 1020: Second moving guide roller; 1030: Fourth linear telescopic mechanism; 1100: Winding mechanism; 1110: Winding guide roller; 1120: Yarn guide; 1200: Fiber yarn. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element 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 invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0025] The continuous fiber prepreg tape production equipment provided by this invention includes an unwinding mechanism, a limiting mechanism, a desizing mechanism, a yarn spreading mechanism, a sizing mechanism, at least three temperature-controlled roller pressing mechanisms, a traction mechanism, and a winding mechanism. The free end of the fiber yarn wound on the unwinding mechanism passes sequentially through the limiting mechanism, the desizing mechanism, the yarn spreading mechanism, the sizing mechanism, the multiple temperature-controlled roller pressing mechanisms, and the traction mechanism, and is finally wound onto the winding mechanism. Compared with traditional prepreg tape forming equipment, the continuous fiber ultra-thin prepreg tape production equipment provided by this invention is equipped with at least three sets of temperature-controlled roller pressing mechanisms. The temperature of each set of temperature-controlled roller pressing mechanisms is gradient-distributed and functionally independent, namely a low-temperature pre-softening section, a high-temperature forming section, and a medium-temperature molding section. Through multiple roller pressings, the prepreg tape is gradually compacted to achieve the ultra-thin thickness specification, while improving thickness uniformity, surface smoothness, and strengthening the bonding effect between fiber and resin. The temperature of each set of temperature-controlled roller pressing mechanisms is adjustable, which can be adapted to different fiber materials and thermoplastic resins, ensuring that the roller pressing is completed under optimal process conditions, and guaranteeing stable quality and consistent performance of the prepreg tape.

[0026] The following is combined Figure 1 The present invention describes a continuous fiber prepreg tape production apparatus.

[0027] An embodiment of the present invention provides a continuous fiber ultrathin prepreg tape production equipment, including an unwinding mechanism 200, a limiting mechanism 300, a desizing mechanism 400, a yarn spreading mechanism 500, a sizing mechanism 600, at least three temperature-controlled roller pressing mechanisms 900, a traction mechanism 1000, and a winding mechanism 1100.

[0028] The fiber yarn 1200 drawn from the unwinding mechanism passes sequentially through the limiting mechanism 300, the desizing mechanism 400, the yarn spreading mechanism 500, the sizing mechanism 600, multiple temperature-controlled roller pressing mechanisms 900, and the traction mechanism 1000. Finally, the prepreg tape is wound up on the winding mechanism 1100. For example, three temperature-controlled roller pressing mechanisms 900 can be provided.

[0029] The continuous fiber ultrathin prepreg tape production equipment provided by this invention achieves prepreg tape thickness control through a three-stage temperature-controlled gradient rolling process, enabling stable, efficient, and low-cost mass production of ultrathin prepreg tape.

[0030] The equipment is equipped with three sets of temperature-controlled roller pressing mechanisms 900. Each set of temperature-controlled roller pressing mechanisms 900 has a gradient temperature distribution and independent function, namely a low-temperature pre-softening section, a high-temperature molding section, and a medium-temperature shaping section. Through three roller pressing processes, the prepreg tape is gradually compacted to achieve an ultra-thin thickness, while improving thickness uniformity, surface smoothness, and strengthening the bonding effect between the fiber and resin. Each set of temperature-controlled roller pressing mechanisms 900 is equipped with an independent temperature control system, which can precisely control the temperature within the range of room temperature to 400℃, adapting to different fiber materials and thermoplastic resins, ensuring that roller pressing is completed under optimal process conditions, and guaranteeing stable quality and consistent performance of the prepreg tape.

[0031] In some embodiments, the continuous fiber prepreg tape production equipment also includes a frame 100, an unwinding mechanism 200, a limiting mechanism 300, a desizing mechanism 400, a yarn spreading mechanism 500, a sizing mechanism 600, a temperature-controlled roller pressing mechanism 900, a traction mechanism 1000, and a winding mechanism 1100, all of which are miniaturized, that is, the above-mentioned mechanisms in the prior art are scaled down according to a certain proportion.

[0032] The frame 100 may include an electrical box 110, a horizontal mounting plate 120 and a vertical mounting plate 130. The electrical box 110 is located at the bottom and is equipped with casters at the bottom for easy movement. The horizontal mounting plate 120 is located at the top of the electrical box 110 and the vertical mounting plate 130 is located at the top rear side of the horizontal mounting plate 120.

[0033] The unwinding mechanism 200, the limiting mechanism 300, the desizing mechanism 400, the yarn spreading mechanism 500, the sizing mechanism 600, the temperature-controlled roller pressing mechanism 900, the traction mechanism 1000, and the winding mechanism 1100 adopt a miniaturized design. Specifically, compared with traditional prepreg tape forming equipment, the size, weight, and energy consumption of the above mechanisms are reduced by more than 90%.

[0034] In one specific embodiment, see Figure 1 In the upper half of the vertical mounting plate 130, from right to left, an unwinding mechanism 200, a limiting mechanism 300, a desizing mechanism 400, and a yarn unfolding mechanism 500 are arranged sequentially. On the lower left side of the vertical mounting plate 130, a sizing mechanism 600 is arranged. At the top of the horizontal mounting plate, from left to right, three sets of temperature-controlled roller pressing mechanisms 900 and a traction mechanism 1000 are arranged sequentially. On the right side of the lower half of the vertical mounting plate, a winding mechanism 1100 is arranged. This allows for layered installation of the aforementioned mechanisms, reducing the space occupied in the planar layout.

[0035] The continuous fiber prepreg tape production equipment provided in the embodiments of this application has the following characteristics: Equipment Integration: The aforementioned mechanisms are integrated into a single frame (100), including unwinding, limiting, desizing, impregnation, rolling, and rewinding. A layered structure is employed, effectively reducing the equipment's size. The overall dimensions of the equipment are 2.95m × 0.55m × 1.1m, facilitating movement and installation. The equipment, equipped with three temperature-controlled rolling mechanisms, enables the production of ultra-thin prepreg tapes. It features a simple structure, low cost, high efficiency, and stable performance.

[0036] Low power consumption: Existing ultra-thin prepreg tape equipment requires large-capacity liquid storage devices and precision temperature control systems, or extremely demanding gas power systems, resulting in complex structures and high energy consumption. This equipment eliminates the hot drying and hot pressing modules, achieving ultra-thin prepreg tape preparation solely through three temperature-controlled roller pressing mechanisms. The total power consumption is only 7 kWh, significantly reducing electricity costs.

[0037] In some embodiments, at least two unwinding mechanisms 200 may be provided, so that multiple fiber yarns 1200 can be run in parallel to produce thermoplastic prepreg tapes of different widths.

[0038] The unwinding mechanism 200 can be a driven guide roller with tension control function, which can apply a constant tension to the fiber yarn 1200 while releasing the fiber yarn 1200.

[0039] In some embodiments, the limiting mechanism 300 includes a horizontal limiting roller group and a vertical limiting roller group.

[0040] The horizontal limiting roller assembly includes two vertical limiting guide rollers 310, the axes of which extend vertically, and the plane containing the axes of the two vertical limiting guide rollers 310 is perpendicular to the vertical mounting plate 130. The horizontal distance between the two vertical limiting guide rollers 310 is adjustable to limit the horizontal movement of fiber yarns 1200 of different widths.

[0041] Specifically, the horizontal limiting roller assembly is mounted on the vertical mounting plate 130 via a first mounting plate, which is perpendicular to the vertical mounting plate 130. The vertical limiting guide rollers 310 can also be driven guide rollers. Both vertical limiting guide rollers 310 are slidably connected to the first mounting plate and slide in a direction perpendicular to the front side of the vertical mounting plate 130. A locking assembly is also provided between the vertical limiting guide rollers 310 and the first mounting plate. When the locking assembly is unlocked, the positions of the two vertical limiting guide rollers 310 and the distance between them can be adjusted. When the locking assembly is locked, it restricts the positions of the two vertical limiting guide rollers 310.

[0042] Similarly, the vertical limiting roller assembly includes two horizontal limiting guide rollers 320. The axes of the two horizontal limiting guide rollers 320 extend in a direction perpendicular to the front side of the vertical mounting plate 130, and the plane containing the axes of the two horizontal limiting guide rollers 320 is perpendicular to the horizontal mounting plate 120. The longitudinal spacing between the two horizontal limiting guide rollers 320 is adjustable to limit the vertical movement of fiber yarns 1200 at different heights.

[0043] Specifically, second mounting plates are provided on the front and rear sides of the top of the first mounting plate. The second mounting plates are perpendicular to the first mounting plate and parallel to the front side of the vertical mounting plate 130. The horizontal limiting guide roller 320 is also a driven guide roller. The horizontal limiting guide roller 320 is installed between the two second mounting plates and is slidably connected to the second mounting plates. The sliding direction is vertical. A locking assembly is also provided between the horizontal limiting guide roller 320 and the second mounting plates. When the locking assembly is unlocked, the position of the two horizontal limiting rollers and the longitudinal distance between them can be adjusted. When the locking assembly is locked, it restricts the position of the two horizontal limiting guide rollers 320.

[0044] Two vertical limiting guide rollers 310 and two horizontal limiting guide rollers 320 form a grid-like structure to limit the position of the fiber yarn 1200 in the horizontal and vertical directions.

[0045] In some embodiments, the desizing mechanism 400 includes an oven 410 and a set of guide rollers.

[0046] The oven 410 is equipped with a heating device, such as multiple heating resistance wires, and the temperature can be continuously adjusted from room temperature to 400°C. A yarn inlet and a yarn outlet are respectively provided at both ends of the oven 410 along the extension direction of the fiber yarn 1200. The yarn inlet and yarn outlet can be rectangular strip-shaped through holes, aligned in the left-right direction.

[0047] The guide roller assembly includes an inlet guide roller 420 and an outlet guide roller 430. The contact surface between the inlet guide roller 420 and the fiber yarn 1200, the center surface of the yarn inlet, the center surface of the yarn outlet, and the contact surface between the outlet guide roller 430 and the fiber yarn 1200 are all on the same plane. In other words, in this embodiment, the yarn inlet and yarn outlet provided on the oven 410 are aligned in the left-right direction. In order for the fiber yarn 1200 to pass smoothly through the yarn inlet and yarn outlet, the fiber yarn 1200 needs to pass through the oven 410 in a horizontal posture. Therefore, the inlet guide roller 420 and the outlet guide roller 430 stretch the fiber yarn 1200 into a horizontal posture on the left and right sides of the oven 410.

[0048] The desizing unit 400 can completely remove the resin adhering to the surface of the continuous fiber yarn 1200.

[0049] In some embodiments, the yarn spreading mechanism 500 includes two friction guide rollers 510 and a vibration assembly. The vibration assembly includes a first linear telescopic mechanism 530 and a yarn spreading guide roller 520. The yarn spreading guide roller 520 is connected to the telescopic end of the first linear telescopic mechanism 530, and the axis of the yarn spreading guide roller 520 is perpendicular to the telescopic direction of the first linear telescopic mechanism 530. The two friction guide rollers 510 and the yarn spreading guide roller 520 form a triangle. The telescopic direction of the first linear telescopic mechanism 530 is perpendicular to the plane containing the axes of the two friction guide rollers 510. The first linear telescopic mechanism 530 drives the yarn spreading guide roller 520 to reciprocate.

[0050] Specifically, the rear ends of the two friction guide rollers 510 can be connected to the vertical support plate, and the plane containing the axes of the two friction guide rollers 510 is horizontal. The first linear telescopic mechanism 530 is located below the middle of the two friction guide rollers 510, and the first telescopic mechanism extends downward and retracts upward. The yarn spreading guide roller 520 is located at the telescopic end of the first telescopic mechanism, and the axis of the yarn spreading guide roller 520 is parallel to the axis of the friction guide roller 510.

[0051] During operation, the fiber yarn 1200 first passes over the friction guide roller 510 located upstream, then passes over the bottom end of the spreading guide roller 520, and then passes over the friction guide roller 510 located downstream. The first telescopic mechanism drives the spreading guide roller 520 to vibrate up and down at a high frequency and low amplitude, so that the fiber bundle of the fiber yarn 1200 is fully spread out.

[0052] It should be noted that the first linear telescopic mechanism 530 can be a cylinder.

[0053] In some embodiments, the impregnation mechanism 600 includes at least one, and when the number of impregnation mechanisms 600 is greater than or equal to two, the impregnation mechanisms 600 are distributed along the extension direction of the fiber yarn 1200. Each impregnation mechanism 600 includes a pre-impregnation tank 610, at least one first guide roller, and a sizing extrusion mechanism.

[0054] The prepreg tank 610 can be a trapezoidal structure made of plastic, with the large end of the prepreg tank 610 open and facing upward. A stirring device, such as a magnetic stirrer, is installed inside the prepreg tank 610 to prevent the resin slurry from settling.

[0055] Two first guide rollers can be provided in each prepreg tank 610. The two first guide rollers are located on the inner side of the prepreg tank 610 near the bottom and are distributed in the left and right direction. When the fiber yarn 1200 enters the prepreg tank 610, it passes around the bottom of the two first guide rollers in sequence and then extends to the outside of the prepreg tank 610. When the fiber yarn 1200 passes through the prepreg tank 610, the resin slurry suspension will adhere to the fiber surface and combine with the fiber through the sizing agent.

[0056] The slurry extrusion mechanism includes a second guide roller 620, an extrusion guide roller 630, and a distance adjustment mechanism 640. The rear end of the second guide roller 620 is connected to and perpendicular to the vertical mounting plate 130. The extrusion guide roller 630 is connected to the vertical mounting plate 130 via the distance adjustment mechanism 640, and the axis of the extrusion guide roller 630 is parallel to the axis of the second guide roller 620. The distance adjustment mechanism 640 can adjust the distance between the two rollers in a direction perpendicular to the axis of the extrusion guide roller 630, moving them closer to or further away from the second guide roller 620.

[0057] For example, the distance adjustment mechanism 640 can be a cylinder that controls the extrusion guide roller 630 to extend or retract toward or away from the second guide roller 620 to adjust the distance between the two.

[0058] After the fiber yarn 1200 passes through the prepreg tank 610, it needs to pass through the area between the second guide roller 620 and the extrusion guide roller 630. By adjusting the distance between the second guide roller 620 and the extrusion guide roller 630, the thickness of the yarn with the resin paste attached can be changed, that is, the amount of resin paste can be adjusted. When passing through the second guide roller 620 and the extrusion guide roller 630, the excess resin paste is squeezed off and falls back into the prepreg tank 610.

[0059] In some embodiments, the temperature-controlled roller pressing mechanism 900 includes a first fixed guide roller 910, a first movable guide roller 920, and a third linear telescopic mechanism 930. The first fixed guide roller 910 is parallel to the axis of the first movable guide roller 920. The first movable guide roller 920 is connected to the telescopic end of the third linear telescopic mechanism 930. The third linear telescopic mechanism 930 is used to drive the first movable guide roller 920 to approach or move away from the first fixed guide roller 910 in a direction perpendicular to the axis of the first fixed guide roller 910.

[0060] Specifically, the first fixed guide roller 910 is mounted on the top of the horizontal mounting plate 120 via the first bracket, and the axis of the first fixed guide roller 910 is perpendicular to the vertical mounting plate 130. The third linear telescopic mechanism 930 is located on the top of the first bracket, with its telescopic end facing downwards. The first movable guide roller 920 is connected to the telescopic end of the third linear telescopic mechanism 930. The first movable guide roller 920 can be located directly above the first fixed guide roller 910, and the axis of the first movable guide roller 920 is also perpendicular to the vertical mounting plate 130.

[0061] The third linear telescopic mechanism 930 is used to drive the first movable guide roller 920 to move up and down, so as to adjust the distance between the bottom end of the first movable guide roller 920 and the top end of the first fixed guide roller 910, thereby controlling the thickness of the prepreg tape passing through the temperature-controlled roller pressing mechanism 900.

[0062] Heating tubes are provided inside the first moving guide roller 920 and the first fixed guide roller 910. The temperature of the heating tubes can be continuously adjusted within the range of room temperature to 400°C.

[0063] In addition, the first movable guide roller 920 and the first fixed guide roller 910 are hollow inside, and their ends are detachably connected with joints. The joints are used to connect to the circulating water chiller to cool the inside of the first movable guide roller 920 and the first fixed guide roller 910, so as to ensure that the high temperature of the first fixed guide roller 910 and the first movable guide roller 920 of the roller pressing mechanism 900 during heating will not damage the slip ring and other components.

[0064] In some embodiments, the traction mechanism 1000 includes a second fixed guide roller 1010, a second movable guide roller 1020, and a fourth linear telescopic mechanism 1030. The second fixed guide roller 1010 is parallel to the axis of the second movable guide roller 1020. The second movable guide roller 1020 is connected to the telescopic end of the fourth linear telescopic mechanism 1030. The fourth linear telescopic mechanism 1030 is used to drive the second movable guide roller 1020 to approach or move away from the second fixed guide roller 1010 in a direction perpendicular to the axis of the second fixed guide roller 1010.

[0065] Specifically, the second fixed guide roller 1010 is mounted on the top of the horizontal mounting plate 120 via the second bracket, and the axis of the second fixed guide roller 1010 is perpendicular to the vertical mounting plate 130. The fourth linear telescopic mechanism 1030 is located on the top of the second bracket, with its telescopic end facing downwards. The second movable guide roller 1020 is connected to the telescopic end of the fourth linear telescopic mechanism 1030. The second movable guide roller 1020 can be located directly above the second fixed guide roller 1010, and the axis of the second movable guide roller 1020 is also perpendicular to the vertical mounting plate 130.

[0066] The fourth linear telescopic mechanism 1030 is used to drive the second movable guide roller 1020 to move up and down, so as to adjust the distance between the bottom end of the second movable guide roller 1020 and the top end of the second fixed guide roller 1010, thereby clamping the prepreg tape passing between the second movable guide roller 1020 and the second fixed guide roller 1010.

[0067] In addition, the second fixed guide roller 1010 can be equipped with a separate motor for rotation, and the speed is adjustable. The second fixed guide roller 1010 and the second movable guide roller 1020 can be polyurethane coated wheels with a diameter of 100mm. They use friction to drive the prepreg belt forward and use the fourth linear telescopic mechanism 1030 to apply pressure and open and close.

[0068] In some embodiments, the winding mechanism 1100 includes a winding guide roller 1110, a guide roller drive device, and a wire guide 1120. The guide roller drive device can be a motor that drives the winding guide roller 1110 to rotate, using friction winding to match the speed of the traction mechanism 1000. The wire guide 1120 reciprocates in the front-back direction, driving the prepreg tape to reciprocate in the front-back direction, thereby winding it onto the winding guide roller 1110.

[0069] The continuous fiber ultrathin prepreg tape production equipment provided by this invention is applicable to continuous fiber and thermoplastic resin systems including: Continuous fibers: glass fiber, aramid fiber, basalt fiber and carbon fiber.

[0070] Thermoplastic resins: polypropylene (PP), polycarbonate (PC), polyamide 6 (PA6), polyamide 66 (PA66), polyphthalamide (PPA), polyimide (PI), polyethersulfone (PES), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), and polyetherketoneketone (PEKK).

[0071] The main production steps include: unwinding, desizing, spreading, sizing, rolling, and rewinding.

[0072] The following is a specific embodiment: The following raw materials were used to prepare continuous carbon fiber reinforced polyamide 6 (PA6) ultrathin prepreg tape using the equipment of this invention: Continuous carbon fiber (T700, 12K continuous carbon fiber). Polyamide 6 (PA6) resin powder (325 mesh).

[0073] The preparation steps of continuous carbon fiber reinforced polyetheretherketone ultrathin prepreg tape are as follows: Place the carbon fiber on the unwinding mechanism 200. The unwinding mechanism 200 has two fixed conical rings, which are fixed with screws. Fix the inner conical ring to the inside and tighten it. Then put the carbon fiber roll in and use the other conical ring to support the carbon fiber roll and tighten it.

[0074] Pull out the carbon fiber bundle and pass it through the limiting mechanism 300 to prevent the fiber yarn 1200 from shifting left, right, up, or down.

[0075] Continue to pass the carbon fiber through the desizing mechanism 400. After passing through, start the heating and drying device, and set the temperature to 300℃.

[0076] The carbon fiber reaches the yarn spreading mechanism 500, and passes through the friction roller 510, the yarn spreading guide roller 520, and the friction guide roller 510 respectively, and then reaches the sizing mechanism 600.

[0077] The impregnation mechanism 600 includes two sets of preimpregnation tanks 610, two sets of magnetic stirrers, and two sets of extrusion mechanisms. Each preimpregnation tank 610 has a fixed first guide roller. First, the carbon fiber passes through the lower contact surface of the first guide roller in the preimpregnation tank 610, then through the space between the extrusion guide roller and the second guide roller 620, then through the lower contact surface of the first guide roller in the second preimpregnation tank, and then through the space between the extrusion guide roller and the second guide roller 620, finally reaching the drying mechanism. After the carbon fiber passes through the impregnation mechanism 600, 500 mL of slurry is added to each preimpregnation tank 610. Then, the magnetic stirrer below the preimpregnation tank 610 is turned on, causing the stir bar to rotate and stir, preventing powder sedimentation in the slurry. The stirring speed is set to 450 rpm.

[0078] After the carbon fiber reaches the temperature-controlled rolling mechanism 900, the circulating water chiller is first turned on, the temperature is set to 15℃, and the internal circulation is activated to ensure that the high temperature of the first moving guide roller 920 and the first fixed guide roller 910 of the temperature-controlled rolling mechanism 900 during heating will not damage components such as the slip ring. The first moving guide rollers 920 of the three temperature-controlled rolling mechanisms 900 are lifted, and then the carbon fiber is passed sequentially through the area between the first moving guide rollers 920 and the first fixed guide rollers 910 of the three temperature-controlled rolling mechanisms 900, and then enters the traction mechanism 1000. The temperature-controlled rolling mechanisms 900 begin heating, with the temperature of the first temperature-controlled rolling mechanism 900 set at 160-180℃, the temperature of the second temperature-controlled rolling mechanism 900 set at 230-250℃, and the temperature of the third temperature-controlled rolling mechanism 900 set at 180-200℃, while the first moving guide rollers 920 of the three temperature-controlled rolling mechanisms 900 remain raised.

[0079] The second movable guide roller 1020 of the traction mechanism 1000 is lifted, and then the carbon fiber passes through the traction mechanism 1000 and reaches the winding mechanism 1100. The second movable guide roller 1020 of the traction mechanism 1000 remains in the lifted state.

[0080] The carbon fiber arrives at the winding mechanism 1100. First, the take-up reel is installed on the winding spool, and both ends are fixed with friction discs and conical discs. Then, the carbon fiber is wound tightly onto the take-up reel.

[0081] After the carbon fiber preparation is completed, the carbon fiber is manually tensioned, and the first moving guide roller 920 of the three temperature-controlled roller pressing mechanisms 900 and the second moving guide roller 1020 of the traction mechanism 1000 are pressed down and closed.

[0082] After all preparations are completed and all temperatures reach the set temperatures, start the yarn spreading mechanism 500 and set the speed to 200 r / min. Then, turn on the motors of the traction mechanism 1000 and the winding mechanism 1100, and set their speeds to 40 mm / s and 50 mm / s respectively. After the formed ultra-thin prepreg tape reaches the winding mechanism 1100, remove the unformed carbon fibers from the front, and then fix the ultra-thin prepreg tape onto the roll to begin the preparation of continuous carbon fiber reinforced thermoplastic ultra-thin prepreg tape.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A continuous fiber ultrathin prepreg tape production equipment, characterized in that, It includes an unwinding mechanism (200), a limiting mechanism, a desizing mechanism (400), a yarn spreading mechanism (500), a sizing mechanism (600), at least three temperature-controlled roller pressing mechanisms (900), a traction mechanism (1000), and a winding mechanism (1100). The free end of the fiber yarn (1200) wound on the unwinding mechanism (200) passes sequentially through the limiting mechanism, the desizing mechanism (400), the yarn spreading mechanism (500), the sizing mechanism (600), the multiple temperature-controlled roller pressing mechanisms (900), and the traction mechanism (1000), and is finally wound on the winding mechanism (1100).

2. The continuous fiber ultrathin prepreg tape production equipment according to claim 1, characterized in that, It also includes a frame (100), and the unwinding mechanism (200), the limiting mechanism, the desizing mechanism (400), the yarn spreading mechanism (500), the sizing mechanism (600), the temperature-controlled roller pressing mechanism (900), the traction mechanism (1000), and the winding mechanism (1100) are all miniaturized mechanisms. The unwinding mechanism (200), the limiting mechanism, the desizing mechanism (400), the yarn spreading mechanism (500), the sizing mechanism (600), the temperature-controlled roller pressing mechanism (900), the traction mechanism (1000), and the winding mechanism (1100) are arranged in at least two layers on the frame (100).

3. The continuous fiber ultrathin prepreg tape production equipment according to claim 1 or 2, characterized in that, At least one unwinding mechanism (200) is provided.

4. The continuous fiber ultrathin prepreg tape production equipment according to claim 1 or 2, characterized in that, The limiting mechanism includes: The horizontal limiting roller group includes two vertical limiting guide rollers (310), the distance between the two vertical limiting guide rollers (310) is adjustable, the fiber yarn (1200) passes through the middle area of ​​the two vertical limiting guide rollers (310), and the fiber yarn (1200) located on both sides in the horizontal direction contacts the adjacent vertical limiting guide roller (310); The vertical limiting roller assembly includes two horizontal limiting guide rollers (320), the distance between the two horizontal limiting guide rollers (320) is adjustable, the fiber yarn (1200) passes through the middle area of ​​the two horizontal limiting guide rollers (320), and the top and bottom of the fiber yarn (1200) are in contact with the corresponding horizontal limiting guide roller (320).

5. The continuous fiber ultrathin prepreg tape production equipment according to claim 1 or 2, characterized in that, The desizing mechanism (400) includes: The oven (410) has a yarn inlet and a yarn outlet on both sides along the extension direction of the fiber yarn (1200), and a heating device is provided inside the oven (410). The guide roller assembly includes an inlet guide roller (420) and an outlet guide roller (430). The contact surface between the inlet guide roller (420) and the fiber yarn (1200), the center surface of the yarn inlet, the center surface of the yarn outlet, and the contact surface between the outlet guide roller (430) and the fiber yarn (1200) are located on the same plane.

6. The continuous fiber ultrathin prepreg tape production equipment according to claim 1 or 2, characterized in that, The yarn spreading mechanism (500) includes two friction guide rollers (510) and a vibration assembly. The vibration assembly includes a first linear telescopic mechanism (530) and a yarn spreading guide roller (520). The yarn spreading guide roller (520) is connected to the telescopic end of the first linear telescopic mechanism (530), and the axis of the yarn spreading guide roller (520) is perpendicular to the telescopic direction of the first linear telescopic mechanism (530). The two friction guide rollers (510) and the yarn spreading guide roller (520) form a triangle. The telescopic direction of the first linear telescopic mechanism (530) is perpendicular to the plane containing the axes of the two friction guide rollers (510). The first linear telescopic mechanism (530) drives the yarn spreading guide roller (520) to reciprocate.

7. The continuous fiber ultrathin prepreg tape production equipment according to claim 1 or 2, characterized in that, The impregnation mechanism (600) includes at least one, and when the number of the impregnation mechanisms (600) is greater than or equal to two, the impregnation mechanisms (600) are distributed along the extension direction of the fiber yarn (1200), and each of the impregnation mechanisms (600) includes: A pre-impregnation tank (610) has an open top and is equipped with a stirring device inside. At least one first guide roller is disposed at the bottom inside the prepreg tank (610), and the fiber yarn (1200) passes through the bottom of the first guide roller; The slurry extrusion mechanism includes a second guide roller (620), an extrusion guide roller (630), and a distance adjustment mechanism (640). The second guide roller (620) is arranged parallel to the extrusion guide roller (630), and the distance adjustment mechanism (640) is connected to the extrusion guide roller (630). The distance adjustment mechanism (640) is used to adjust the distance between the extrusion guide roller (630) and the second guide roller (620).

8. The continuous fiber ultrathin prepreg tape production equipment according to claim 1 or 2, characterized in that, The temperature-controlled roller pressing mechanism (900) includes a first fixed guide roller (910), a first movable guide roller (920), and a third linear telescopic mechanism (930). The first fixed guide roller (910) is parallel to the axis of the first movable guide roller (920). The first movable guide roller (920) is connected to the telescopic end of the third linear telescopic mechanism (930). The third linear telescopic mechanism (930) is used to drive the first movable guide roller (920) to move closer to or away from the first fixed guide roller (910) in a direction perpendicular to the axis of the first fixed guide roller (910).

9. The continuous fiber ultrathin prepreg tape production equipment according to claim 1 or 2, characterized in that, The traction mechanism (1000) includes a second fixed guide roller (1010), a second movable guide roller (1020), and a fourth linear telescopic mechanism (1030). The second fixed guide roller (1010) is parallel to the axis of the second movable guide roller (1020). The second movable guide roller (1020) is connected to the telescopic end of the fourth linear telescopic mechanism (1030). The fourth linear telescopic mechanism (1030) is used to drive the second movable guide roller (1020) to move closer to or away from the second fixed guide roller (1010) in a direction perpendicular to the axis of the second fixed guide roller (1010). The outer peripheral surfaces of the second fixed guide roller (1010) and the second movable guide roller (1020) are provided with friction material.

10. The continuous fiber ultrathin prepreg tape production equipment according to claim 1 or 2, characterized in that, The winding mechanism (1100) includes a winding guide roller (1110), a guide roller drive device, and a wire guide (1120). The guide roller drive device is connected to the winding guide roller (1110) in a transmission manner, and the wire guide (1120) is located on the upstream side of the winding guide roller (1110).

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