Fiber reinforced polyurethane composite material winding molding device

Abstract

The application provides a kind of winding forming device of fiber reinforced polyurethane composite material, including fiber yarn feeding module, impregnation module, tension adjusting module, forming module, rotating module and monitoring and control module, fiber yarn feeding module is used to transport fiber bundle to impregnation module, impregnation module is used to impregnate fiber bundle, forming module is used to wind forming treatment to fiber bundle after impregnation, tension adjusting module is used to adjust the tension of fiber bundle transported to forming module by fiber yarn feeding module, rotating module is used to make fiber bundle in another forming module after winding forming in a forming module, monitoring and control module is used to monitor and control processing to fiber yarn feeding module, impregnation module, tension adjusting module, forming module and rotating module respectively, so that fiber bundle can be automatically wound and formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fiber winding equipment, and particularly relates to a winding forming device for fiber reinforced polyurethane composite material. BACKGROUND

[0002] Fiber winding forming is one of main manufacturing processes of resin-based composite materials, which is a composite material preparation method of impregnating continuous fiber roving or cloth tape with resin glue solution under the conditions of controlling tension and predetermined linear type, continuously winding on a mold, and then curing at room temperature or under heating conditions to form a required product. Compared with other composite material forming processes, fiber winding forming has high degree of mechanization and automation, high and stable product quality, low production cost, easy realization of strength design, reasonable product structure, and therefore has wide application in the fields of aviation, aerospace, ship, automobile and the like.

[0003] Although fiber winding forming is widely applied, there are many technical problems in its large-scale commercial production. At present, most of the winding forming devices for fiber reinforced polyurethane composite material on the market have technical problems such as difficult control of winding tension, too low fiber bundle glue content, short pot life of winding forming resin, easy foaming of polyurethane resin type fiber, influence of fiber impregnation method on winding performance, and non-automated winding forming of fiber bundle, thereby resulting in low forming quality of the fiber winding product prepared by the existing winding forming device for fiber reinforced polyurethane composite material, and further difficult to adapt to the user demand in different fields.

[0004] Therefore, there is an urgent need for a winding forming device for fiber reinforced polyurethane composite material to solve the above technical problems. SUMMARY

[0005] The present application aims to provide a winding forming device for fiber reinforced polyurethane composite material, which can improve the technical problem of low forming quality of the fiber winding product prepared by the existing winding forming device for fiber reinforced polyurethane composite material in the prior art.

[0006] To solve the above technical problems, the application provides a fiber reinforced polyurethane composite winding forming device, which comprises a rack main body, two ends of the rack main body are respectively provided with forming modules, a rotating module is arranged between the two forming modules, a fiber yarn feeding module, a glue dipping module and a tension adjusting module are arranged above the rotating module, the fiber yarn feeding module is used for transporting the fiber bundle to the glue dipping module, the glue dipping module is used for performing glue dipping treatment on the fiber bundle, the forming module is used for performing winding forming treatment on the fiber bundle after the glue dipping treatment, the tension adjusting module is used for performing tension adjusting treatment on the fiber bundle transported from the fiber yarn feeding module to the forming module, and the rotating module is used for rotating the fiber yarn feeding module, the glue dipping module and the tension adjusting module respectively after the fiber bundle in one forming module is completely wound and formed, so that the fiber bundle is subjected to winding forming treatment in another forming module.

[0007] Preferably, the winding forming device of the fiber reinforced polyurethane composite further comprises a monitoring and control module, which is used for monitoring and controlling the fiber yarn feeding module, the glue dipping module, the tension adjusting module, the forming module and the rotating module respectively, so that the fiber bundle can be automatically wound and formed.

[0008] Preferably, the forming module comprises a core mold, a heating mechanism, a clamp mechanism, a first driving motor, a fixed sleeve, an adjusting rod and a rotating hand wheel, the core mold is a circular annular column type mold, the inner wall of the core mold is matched with the outer wall of the heating mechanism, and the two circular annular sides of the core mold are clamped by the clamp mechanism.

[0009] Preferably, the clamp mechanism comprises a first clamping jaw and a second clamping jaw, the output shaft of the first driving motor is connected with the first clamping jaw through a first coupling, the fixed sleeve is fixed on the rack main body, the adjusting rod penetrates through the fixed sleeve and is threadedly matched with the inner wall of the fixed sleeve, one end of the adjusting rod is fixedly connected with the second clamping jaw, the other end of the adjusting rod is fixedly connected with the rotating hand wheel, and the rotating hand wheel is used for adjusting the length of the adjusting rod extending out of the fixed sleeve.

[0010] Preferably, the heating mechanism comprises a heating cavity with a cavity structure, a core pipe concentrically arranged in the heating cavity is arranged in the heating cavity, an electric regulating valve is arranged at the inlet of one end of the core pipe, and the other end of the core pipe is hermetically arranged.

[0011] Preferably, a plurality of first through holes and a plurality of baffles corresponding to the first through holes are arranged on the outer wall of the core pipe, and the baffles are arranged at an angle with the outer wall of the core pipe.

[0012] Preferably, the winding forming device of the fiber reinforced polyurethane composite further comprises a first sliding rail arranged below the core mold, the first sliding rail is threadedly connected with the rack main body, and a liquid receiving groove is slidably connected on the first sliding rail, the liquid receiving groove is used for collecting the glue solution dripping in the winding process of the fiber bundle.

[0013] Preferably, the fiber-reinforced polyurethane composite winding forming device further comprises a plurality of lead screws, both ends of each lead screw are fixed to the upper end of the frame body;

[0014] The impregnation module comprises a winding trolley and a second driving motor. The lower portion of the winding trolley is provided with a plurality of second through holes. Each lead screw penetrates through a corresponding second through hole. The second driving motor is connected to one lead screw through a second coupling. The second driving motor is used to drive the winding trolley to reciprocate along the length direction of the lead screw.

[0015] Preferably, the impregnation module comprises a glue preparation mechanism and an impregnation mechanism, which are both fixedly installed on the winding trolley. The glue preparation mechanism comprises an A material tank, a B material tank, a glue inlet head, and a first flow control valve. The A material tank and the B material tank are fixed to the winding trolley through a glue preparation support. The A material tank and the B material tank are communicated with a preparation cavity through a glue conveying pipe. A rotating paddle is arranged in the preparation cavity. One end of the glue inlet head is communicated with the preparation cavity. The other end of the glue inlet head is communicated with the impregnation mechanism. The first flow control valve is installed on the glue inlet head and is used to control the flow rate of the glue liquid in the glue preparation mechanism into the impregnation mechanism.

[0016] Preferably, the impregnation mechanism comprises a sealed impregnation box with an impregnation cavity. The sealed impregnation box comprises a top box body, a middle box body, and a bottom box body. One end of the middle box body is detachably connected to the top box body. The other end of the middle box body is detachably connected to the bottom box body. The top end of the top box body is provided with a glue liquid standby cavity. The top portion of the impregnation cavity is provided with a rotating spray head. The bottom portion of the impregnation cavity is communicated with one end of a reflux pipe.

[0017] The wall surface of the impregnation box is provided with a plurality of third through holes. The third through holes on the distal wall surface of the impregnation box have a curved channel. The other end of the reflux pipe is communicated with the glue liquid standby cavity. A self-priming pump and a second flow control valve are installed on the reflux pipe.

[0018] Preferably, the tension adjusting module comprises a wire guide mechanism fixed to the winding trolley. The wire guide mechanism comprises a wire nozzle, a storable annular wire guide head, a yarn pressing assembly, and a clamping and shearing assembly. The wire nozzle is located between the mandrel and the impregnation mechanism. The annular wire guide head comprises a plurality of fourth through holes. The annular wire guide head is bolted to the winding trolley through three movable rods. The yarn pressing assembly and the clamping and shearing assembly are respectively slidably connected to the annular wire guide head. The yarn pressing assembly is used to press the fiber bundle tightly on the surface of the mandrel. The clamping and shearing assembly is used for clamping or shearing the fiber bundle.

[0019] When the mandrel penetrates through the annular wire guide head, the fiber bundle is wound on the mandrel through the fourth through holes.

[0020] Preferably, the tension adjusting module further comprises a tension adjusting mechanism fixed to the winding trolley, the tension adjusting mechanism is located between the impregnating mechanism and the nozzle, the tension adjusting mechanism comprises a guide roller assembly, a first gear box, a guide rod and a gear motor assembly connected with the first gear box, the gear motor assembly is used to drive the gear in the first gear box to rotate to tighten the fiber bundle;

[0021] Preferably, the first gear box comprises a fifth through hole, the guide rod comprises a guide hole, and the guide roller assembly comprises a first guide roller and a second guide roller; the fiber bundle wound on the first guide roller passes through the fifth through hole and the guide hole to be wound on the second guide roller.

[0022] Preferably, the rotating module comprises a rotating tray, a second gear box, a support rod and a rotating motor, the winding trolley and the fiber yarn feeding module are arranged on the rotating tray, the second gear box is fixed to the bottom of the rack main body, and the rotating motor is connected with the second gear box.

[0023] Preferably, one end of the support rod is rotatably connected with the second gear box, and the other end of the support rod is fixedly connected with the rotating tray.

[0024] The beneficial effects of the present application are: different from the prior art, the present application provides a fiber reinforced polyurethane composite material winding forming device, comprising a rack main body, two ends of the rack main body are respectively provided with a forming module, a rotating module is arranged between the two forming modules, a fiber yarn feeding module, an impregnating module and a tension adjusting module are arranged above the rotating module, the fiber yarn feeding module is used to transport the fiber bundle to the impregnating module, the impregnating module is used to impregnate the fiber bundle, the forming module is used to wind and form the fiber bundle after impregnation, the tension adjusting module is used to adjust the tension of the fiber bundle transported by the fiber yarn feeding module to the forming module, and the rotating module is used to rotate the fiber yarn feeding module, the impregnating module and the tension adjusting module after the fiber bundle in one forming module is completely wound and formed, so that the fiber bundle is wound and formed in another forming module, wherein the fiber reinforced polyurethane composite material winding forming device further comprises a monitoring and control module, the monitoring and control module is used to monitor and control the fiber yarn feeding module, the impregnating module, the tension adjusting module, the forming module and the rotating module respectively, so that the fiber bundle can be automatically wound and formed; the fiber reinforced polyurethane composite material winding forming device provided by the present application integrates the fiber yarn feeding module, the impregnating module, the tension adjusting module, the forming module, the rotating module and the monitoring and control module on the rack main body, so that the remote control end can cooperatively control the fiber yarn feeding module, the impregnating module, the tension adjusting module, the forming module and the rotating module according to the real-time state data monitored by the monitoring and control module, and then the fiber reinforced polyurethane composite material winding forming device realizes automatic continuous winding and forming of the fiber bundle, and further improves the forming quality of the prepared fiber winding piece. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the foaming phenomenon in polyurethane composite materials.

[0026] Figure 2 This is an overall schematic diagram of the fiber-reinforced polyurethane composite winding molding device in an embodiment of the present invention;

[0027] Figure 3 This is an overall top view of the fiber-reinforced polyurethane composite winding molding apparatus in an embodiment of the present invention;

[0028] Figure 4 This is an overall front view of the fiber-reinforced polyurethane composite winding molding apparatus in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the overall structure of the impregnation mechanism in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the tension adjustment mechanism in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram showing the connection between the heating mechanism and the core mold in the molding module provided in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the yarn pressing assembly and the yarn clamping and cutting assembly in an embodiment of the present invention. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] The technical solution of this application will now be described in conjunction with specific embodiments.

[0035] Please see Figure 1 , Figure 1 This diagram illustrates the foaming process of polyurethane composite materials. The matrix resin material is crucial for the performance of fiber-wound products, and its quality directly impacts the final product's quality. The resin used for winding must be fully bonded to the fibers and possess low viscosity and a long workable time. Polyurethane composites are produced by the reaction of isocyanate and amino or hydroxyl groups in the matrix material. They exhibit superior performance, including good wear resistance, excellent mechanical strength, a certain degree of self-lubrication, and high load-bearing capacity, making them an ideal matrix resin for fiber-wound reinforced composites.

[0036] However, the polyurethane prepolymer contains isocyanate, which is easy to react with water to generate carbon dioxide, thereby causing the polyurethane to foam, seriously affecting the performance of the polyurethane resin, so that the requirements of fiber winding cannot be met, such as Figure 1 The winding forming device 100 of the fiber reinforced polyurethane composite material provided by the present application can perform impregnation treatment on the fiber bundle 69 under closed conditions, and can effectively avoid the technical problem of polyurethane resin foaming.

[0037] Please refer to Figures 2 to 8 , Figure 2 It is a whole schematic view of the winding forming device 100 of the fiber reinforced polyurethane composite material in the embodiment of the present application; Figure 3 It is a whole schematic view of the winding forming device 100 of the fiber reinforced polyurethane composite material in the embodiment of the present application; Figure 4 It is a whole schematic view of the winding forming device 100 of the fiber reinforced polyurethane composite material in the embodiment of the present application; Figure 5 It is a whole schematic view of the impregnation mechanism 4 in the embodiment of the present application; Figure 6 It is a schematic view of the tension adjusting mechanism 39 in the embodiment of the present application;

[0038] Figure 7 It is a schematic view of the connection between the heating mechanism 63 and the core mold 51 in the forming module provided by the embodiment of the present application;

[0039] Figure 8 It is a schematic view of the yarn pressing assembly 24 and the yarn clamping assembly 25 in the embodiment of the present application.

[0040] Specifically, the present application provides a winding forming device 100 of a fiber reinforced polyurethane composite material, comprising a rack main body 1, two ends of the rack main body 1 are respectively provided with a forming module, a rotating module is arranged between the two forming modules, and a fiber yarn feeding module, an impregnation module, a tension adjusting module and a monitoring and control module are arranged above the rotating module;

[0041] The winding forming device 100 of the fiber reinforced polyurethane composite material provided by the present application integrates the fiber yarn feeding module, the impregnation module, the tension adjusting module, the forming module, the rotating module and the monitoring and control module on the rack main body 1, so that the remote control end can cooperatively control the fiber yarn feeding module, the impregnation module, the tension adjusting module, the forming module and the rotating module according to the real-time state data monitored by the monitoring and control module, thereby realizing automatic continuous winding forming of the fiber reinforced polyurethane composite material on the fiber bundle 69, and further improving the forming quality of the prepared fiber winding piece.

[0042] In the embodiment of the present application, the forming module is used for winding forming treatment on the fiber bundle 69 after impregnation treatment.

[0043] Please see Figure 2 , Figure 3 , Figure 4 as well as Figure 7 The molding module is fixed on the main body 1 of the frame. The molding module includes a core mold 51, a heating mechanism 63, a clamping mechanism, a first drive motor 54, a fixing sleeve 58, an adjusting rod 59, and a rotating handwheel 60.

[0044] Specifically, the core mold 51 is a cylindrical mold for fiber winding, providing a suitable winding shape for the fiber bundle 69; wherein, the inner wall of the core mold 51 matches the outer wall of the heating mechanism 63, and the two annular sides of the core mold 51 are clamped by a clamping mechanism.

[0045] Specifically, the heating mechanism 63 includes a heating chamber 631 with a cavity structure. Inside the heating chamber 631 is a core tube 64 concentrically arranged with the core mold 51. An electric regulating valve 65 is installed at the inlet of one end of the core tube 64, and the other end of the core tube 64 is sealed. The outer wall of the core tube 64 has multiple first through holes 641 and multiple baffles 642 corresponding to each of the first through holes 641. The baffles 642 are angled to the outer wall of the core tube 64. This arrangement prevents the temperature of the core mold 51 directly opposite the first through holes 641 from becoming too high.

[0046] Furthermore, the heating rate of the core mold 51 can be controlled by changing the cross-sectional area between the valve core and the valve seat in the electric regulating valve 65.

[0047] Specifically, a first temperature sensor 671 is provided on the side of the heating mechanism 63 near the steam inlet 66. The first temperature sensor 671 belongs to the monitoring and control module. The first temperature sensor 671 can monitor the temperature change in the curing process in the heating mechanism 63 in real time so as to meet the curing temperature of the resin.

[0048] In this embodiment of the invention, one end of the core tube 64 is connected to a heating pipe, and the heating medium in the heating pipe includes any one of high-temperature steam, hot water and hot oil; the heating pipe is connected to the core tube 64 through the steam inlet 66 and is strictly sealed during the production process to prevent leakage of the heating medium; wherein, the core tube 64 is made of a material with a high heat transfer coefficient (such as copper) to reduce the curing time of the product and at the same time avoid the core tube 64 from cracking due to high temperature.

[0049] The heating mechanism 63 heats the fiber bundle 69 as follows: the heating medium in the heating pipe enters the inner cavity of the core tube 64 through the electric regulating valve 65, and enters the outside of the core tube 64 through multiple first through holes 641 provided on the inner cavity surface of the core tube 64, thereby entering the outer cavity of the heating mechanism 63. The heating medium heats the outer cavity wall and heats the core mold 51 by heat conduction, thereby satisfying the purpose of heating and curing the wound finished product.

[0050] Please see Figure 4 The clamping mechanism includes a first jaw 52 and a second jaw 53. The output shaft of the first drive motor 54 is connected to the first jaw 52 through a first coupling 561. The first jaw 52 clamps the core mold 51 and rotates it. A fixing sleeve 58 is provided on the other annular side of the core mold 51. The fixing sleeve 58 is fixed to the frame body 1. An adjusting rod 59 passes through the fixing sleeve 58 and is threaded into the inner wall of the fixing sleeve 58. One end of the adjusting rod 59 is fixedly connected to the second jaw 53, and the other end of the adjusting rod 59 is fixedly connected to the rotating handwheel 60. The length of the adjusting rod 59 extending out of the fixing sleeve 58 can be adjusted by rotating the handwheel 60 to accommodate different core mold 51 sizes.

[0051] Specifically, the core mold 51 is an annular mold made of alloy material with good thermal conductivity; a semi-circular liquid receiving groove 61 is installed below the core mold 51, which can collect the dripping adhesive during the winding process for cleaning after production; and the distance between the liquid receiving groove 61 and the core mold 51 can be adjusted by the first slide rail 62. After winding, the liquid receiving groove 61 will move down to allow for continuous winding. The first slide rail 62 is bolted to the frame body 1.

[0052] In this embodiment of the invention, the impregnation module is used to impregnate the fiber bundle 69.

[0053] Specifically, please refer to Figures 2 to 5 It is known that the fiber-reinforced polyurethane composite winding molding device 100 also includes multiple lead screws 57, and both ends of each lead screw 57 are fixed to the upper end of the frame body 1.

[0054] The impregnation module includes a winding carriage 2 and a second drive motor 55. Multiple second through holes 201 are provided below the winding carriage 2. Figure 2 There are 5 lead screws 57 in total, and each lead screw 57 passes through a corresponding second through hole 201. The second drive motor 55 is connected to a lead screw 57 through a second coupling 562. The second drive motor 55 is used to drive the winding carriage 2 to reciprocate along the length direction parallel to the lead screw 57.

[0055] Furthermore, the impregnation module includes an adhesive preparation mechanism 3 and an impregnation mechanism 4, both fixedly mounted on the winding trolley 2. The adhesive preparation mechanism 3 includes an A material tank 5, a B material tank 6, an adhesive inlet head 10, and a first flow control valve 131. The A material tank 5 and the B material tank 6 are respectively fixed to the left side of the winding trolley 2 by adhesive preparation brackets 300, which can heat and vacuum the adhesive liquid in the A material tank 5 or the B material tank 6. The A material tank 5 and the B material tank 6 are respectively connected to the preparation chamber 8 through adhesive delivery pipes 7, and the dehydrated high-temperature components can be transported to the preparation chamber 8 through the adhesive delivery pipes 7. The preparation chamber 8 is equipped with a rotating paddle 9, which can ensure that the A component and the B component transported to the preparation chamber 8 can be mixed evenly.

[0056] Preferably, in the embodiments of the present invention, component A is a polyurethane prepolymer and component B is a polyurethane chain extender. After the two are mixed in proportion, a reaction occurs to obtain a polyurethane composite material with a network molecular chain crosslinking structure.

[0057] Specifically, one end of the glue inlet 10 is connected to the preparation chamber 8, and the other end of the glue inlet 10 is connected to the impregnation mechanism 4; the first flow control valve 131 is installed on the glue inlet 10, and the flow rate of the glue liquid in the glue preparation mechanism 3 into the impregnation mechanism 4 can be controlled by adjusting the first flow control valve 131, so as to reduce the generation of glue liquid bubbles.

[0058] Specifically, the impregnation mechanism 4 is installed on the winding trolley 2 and fixed by bolts. Its main body is a sealed impregnation box 12 with an impregnation cavity 18. The sealed impregnation box 12 includes a top box, a middle box and a bottom box. One end of the middle box is detachably connected to the top box, and the other end of the middle box is detachably connected to the bottom box. This arrangement facilitates the cleaning of the box.

[0059] Furthermore, to facilitate observation of the impregnation status, the sealed impregnation tank 12 is equipped with a side door with an observation window. By observing the impregnation of the fiber bundle 69 with the adhesive, the adhesive feeding speed and fiber feeding speed can be adjusted. The viscosity of the adhesive can also be observed. If the adhesive cannot meet the requirements, the remaining adhesive in the impregnation chamber 18 can also be discharged from the bottom outlet of the bottom tank.

[0060] Specifically, the top of the top box is provided with a glue preparation chamber 11, the top of the glue dipping chamber 18 is provided with a rotating nozzle 15, and the bottom of the glue dipping chamber 18 is connected to one end of the return pipe 16.

[0061] The wall of the impregnation tank is provided with multiple third through holes 181, and the third through holes 181 on the wall away from the sealed impregnation tank 12 have curved channels 19; the other end of the return pipe 16 is connected to the glue preparation chamber 11, and a self-priming pump 17 and a second flow control valve 132 are installed on the return pipe 16.

[0062] Please see Figure 5After the fiber bundle 69 is wound, the impregnation mechanism 4 can be removed to clean the inside of the sealed impregnation tank 12. The fiber bundle 69 to be impregnated enters the impregnation chamber 18 through the third through hole 181 on the front wall of the sealed impregnation tank 12. Multiple third through holes 181 are provided on the front and rear cavities of the sealed impregnation tank 12 to impregnate multiple fibers. The top of the top of the tank is provided with a glue reserve chamber 11. The top of the impregnation chamber 18 is provided with a rotating nozzle 15. The bottom of the impregnation chamber 18 is connected to one end of the return pipe 16. The remaining glue in the impregnation chamber 18 is returned to the glue reserve chamber 11 by the self-priming pump 17.

[0063] Preferably, the third through hole 181 on the rear wall of the sealed impregnation tank 12 is connected to the curved channel 19. The impregnated fiber enters the curved channel 19, so that a resin film surrounds the fiber. The static pressure applied to the resin film by the curved channel 19 and the tension of the fiber itself make the fiber fully impregnated.

[0064] Preferably, the self-priming pump 17 is a small diaphragm pump, which can pressurize the excess adhesive in the channel and deliver it to the adhesive reserve chamber 11 for use, reducing adhesive waste; the rotating nozzle 15 can change the delivery pressure by adjusting the cross-sectional area of ​​the adhesive flow channel inside the nozzle, thereby ensuring that the adhesive in the rotating nozzle 15 is completely sprayed into the impregnation chamber 18, so that there is no adhesive residue in the rotating nozzle 15, and the adhesive is prevented from solidifying and blocking the nozzle of the rotating nozzle 15; the adhesive flow rate needs to match the forward speed of the fiber bundle 69. The forward fiber bundle 69 comes into contact with the adhesive flowing from top to bottom, so that the adhesive adheres to the fiber. In order to prevent the fiber bundle 69 from sticking together after impregnation, the curved channel 19 is arranged in strands.

[0065] Furthermore, to ensure the complete reaction of the two components of the adhesive, tank A (5), tank B (6), preparation chamber (8), adhesive reserve chamber (11), and sealed impregnation tank (12) all need to maintain a certain temperature. Each tank, chamber, and box is made of double-layered metal material to ensure the inflow of high-temperature steam; the inner metal layer uses a material with a high thermal conductivity, such as copper. Multiple second temperature sensors (672) are installed between the two metal layers to ensure the adhesive reaches the required reaction temperature.

[0066] In this embodiment of the invention, the tension adjustment module is used to adjust the tension of the fiber bundle 69 transported from the fiber feeding module to the forming module.

[0067] Specifically, please refer to Figure 2 , Figure 3 , Figure 6 as well as Figure 8The tension adjustment module includes a yarn guide mechanism 20 fixed on the winding carriage 2. The yarn guide mechanism 20 includes a yarn nozzle 21, a retractable annular yarn guide head 22, a yarn pressing assembly 24, and a yarn clamping and cutting assembly 25. The yarn nozzle 21 is located between the core mold 51 and the impregnation mechanism 4. The annular yarn guide head 22 includes multiple fourth through holes 26. The annular yarn guide head 22 is bolted to the winding carriage 2 through three movable rods 221. The yarn pressing assembly 24 and the yarn clamping and cutting assembly 25 are slidably connected to the annular yarn guide head 22. The yarn pressing assembly 24 is connected to the first servo motor 271. The first servo motor 271 is used to press the fiber bundle 69 onto the surface of the core mold 51 through the yarn pressing assembly 24. The yarn clamping and cutting assembly 25 is used to perform yarn clamping or yarn cutting processes on the fiber bundle 69.

[0068] When the core mold 51 passes through the annular guide head 22, the fiber bundle 69 is wound around the core mold 51 through the fourth through hole 26.

[0069] Preferably, the tension adjustment module further includes a tension adjustment mechanism 39 fixed on the winding carriage 2. The tension adjustment mechanism 39 is located between the impregnation mechanism 4 and the nozzle 21. The tension adjustment mechanism 39 includes a guide roller assembly 40, a first gearbox 42, a guide rod 49, and a gear motor assembly connected to the first gearbox 42. The gear motor assembly is used to drive the gears in the first gearbox 42 to rotate to tighten the fiber bundle 69. The tension adjustment mechanism 39 can adjust the tension during the production process by setting different gear directions.

[0070] Preferably, the first gearbox 42 includes a fifth through hole 421, the guide rod 49 includes a guide hole 491, and the guide roller assembly 40 includes a first guide roller 401, a second guide roller 402, and a third guide roller 403; the fiber bundle 69 wound on the first guide roller 401 is wound on the second guide roller 402 through the fifth through hole 421 and the guide hole 491, and then wound on the third guide roller 403 through the second guide roller 402.

[0071] Specifically, after the tension of the fiber bundle 69 is adjusted by the tension adjustment mechanism 39, it is guided to the annular guide head 22. The annular guide head 22 is located below the wire nozzle 21 and is divided into upper and lower half rings. The two half rings are connected by a key and are respectively connected to the box bolts of the winding carriage 2.

[0072] Furthermore, the rod connecting the annular guide head 22 to the winding carriage 2 is a three-section movable rod 221. After winding is completed, the annular guide head 22 can be retracted to wind the mandrel 51 in the forming module at another station. Each of the upper and lower halves of the ring has four fourth through holes 26, allowing a single fiber to be guided and wound onto the mandrel 51 via the guide roller assembly 40 and the fourth through holes 26. Simultaneous winding of multiple fibers avoids uneven winding of a single fiber, improving the production efficiency of fiber winding.

[0073] Furthermore, the vertical slide rail 23 is installed below the fourth through hole 26 and serves as the mounting base for the yarn pressing assembly 24 and the yarn clamping and cutting assembly 25. The vertical slide rail 23 is connected to a second servo motor 272. The second servo motor 272 adjusts the position of the vertical slide rail 23 on the annular guide head 22 to drive the yarn pressing assembly 24 and the yarn clamping and cutting assembly 25 away from or closer to the winding mandrel 51 to meet the needs of winding products of different specifications.

[0074] Please see Figure 8 The yarn pressing assembly 24 is driven by the first servo motor 271. The yarn pressing assembly 24 consists of a triangular rocker arm 28, an electric push rod 29, an L-shaped bracket 30, and a yarn pressing roller 31. It is controlled by the servo controller 68 in the monitoring and control unit. The first servo motor 271 can drive the triangular rocker arm 28 and the electric push rod 29 to drive the yarn pressing roller 31 to press the fibers onto the surface of the core mold 51.

[0075] Specifically, the yarn clamping and cutting assembly 25 is a multi-link structure driven by an electric push rod 29. It consists of a multi-link component 32, a buffer block 33, a pressure block 34, a spring 35, a yarn cutting blade 36, and a sliding bracket 37. The yarn clamping and cutting assembly 25 includes a sand clamping component and a yarn cutting component. The sand clamping and yarn cutting processes can be realized by driving the electric push rod 29. The electric push rod 29 is fixed on the vertical slide rail 23 and is the driving component of the yarn clamping and cutting assembly 25. Its output end is fixedly connected to the multi-link component 32. The tail end of the multi-link component 32 is connected to a buffer block 33; the sliding bracket 37 is provided with a limiting roller 38 in the middle, which applies a certain constraint to the fiber, restricts the fiber's forward direction, avoids fiber oscillation, and reduces the fiber's glue content. The tail end of the component is provided with a groove to realize the installation of the pressure block 34, spring 35 and yarn cutting blade 36; the pressure block 34 is connected to the spring 35. When not under the pressure of the buffer block 33, the upper surface of the pressure block 34 is higher than the yarn cutting blade 36; when under pressure, the spring 35 is compressed, driving the pressure block 34 to move inward, so that the yarn cutting blade 36 is higher than the upper surface of the pressure block 34, and the fiber bundle 69 contacts the yarn cutting blade 36 to complete the yarn cutting; the installation position of the yarn cutting blade 36 is within the compressible range of the buffer block 33.

[0076] Please see Figure 6 In Figure 6 a and Figure 6 b, Figure 6 a is a cross-sectional schematic diagram of the first gearbox 42. Figure 6 b is a cross-sectional schematic diagram of the tension adjustment mechanism 39; specifically, the tension adjustment mechanism 39 uses a gear motor assembly to drive the rotation of large and small gears to tighten the fiber bundle 69, thereby changing the tension of the fiber bundle 69 after impregnation. The first gearbox 42 includes a first pinion 43, a second pinion 45, a first large gear 44, and a second large gear 46. The first pinion 43 meshes with the first large gear 44, and the second pinion 45 meshes with the second large gear 46.

[0077] Specifically, before winding begins, the fifth through-hole 421 on the first large gear 44 and the second large gear 46 is located near the side of the sealed impregnation tank 12, and the fiber bundle 69 is in a taut state. The fifth through-hole 421 is provided with isolation teeth to prevent the fiber bundle 69 from shifting or sticking during gear rotation. During winding, the tension of the yarn can be sensed by the tension sensor 41. Multiple tension sensors 41 are respectively arranged in the first guide roller 401, the second guide roller 402 and the third guide roller 403. The tension sensor 41 is used to monitor the pressure change of the guide roller assembly 40 during winding and indirectly sense the tension change. It is mainly responsible for the tension control of the entire fiber bundle 69.

[0078] When the pointer reading of at least one tension sensor 41 is lower than the set value (the set value does not exceed 600N), the first gear motor 47 and the second gear motor 48 are controlled by the servo controller 68 to drive the first pinion 43 and the second pinion 45 to rotate, and the first large gear 44 and the second large gear 46 meshing with them rotate in turn to supplement the fiber bundle 69 with a certain tension.

[0079] Please see Figure 2 as well as Figure 4 The tension adjustment module also includes multiple guide rollers 50 fixed on the winding carriage 2 and a combing hole 14. The multiple guide rollers 50 are located between the impregnation mechanism 4 and the fiber support 71 to provide pre-tension force for the fiber bundle 69. The surfaces of the guide roller assembly 40 and the guide rollers 50 that contact the fiber bundle 69 are all smooth.

[0080] The combing hole 14 is located between the tension adjustment mechanism 39 and the impregnation mechanism 4. Since the fiber bundle 69 is divided into upper and lower strands after coming out of the sealed impregnation box 12, the combing hole 14 can make the two fiber bundles 69 enter the tension adjustment mechanism 39 at the same position.

[0081] In this embodiment of the invention, the fiber feeding module is used to transport the fiber bundle 69 to the impregnation module.

[0082] Specifically, please refer to Figure 2 as well as Figure 3 The fiber feeding module includes a third drive motor 70, a fiber support 71, and a limiter 72. The third drive motor 70 and the limiter 72 are both mounted on the fiber support 71, which is fixed to a rotating tray 73. The fiber support 71 is used to hold the purchased roll of fiber. Limiters 72 are provided at both ends of the fiber support 71 to restrict its horizontal movement and prevent uneven fiber distribution caused by inertia during winding. The fiber feeding speed can be controlled by adjusting the third drive motor 70, and the servo controller 68 controls the third drive motor 70.

[0083] Furthermore, the limiter 72 is installed on the fiber support 71. The tension of a single fiber bundle can also be controlled by the elastic structure inside the limiter 72. When the tension of the fiber bundle 69 fluctuates due to the effects of impregnation or winding, the limiter 72 will adjust its own angle to keep the single fiber in a taut state and maintain the same tension for each fiber bundle.

[0084] In this embodiment of the invention, the rotating module is used to rotate the fiber feeding module, the impregnation module and the tension adjustment module respectively after the fiber bundle 69 in one forming module is completely wound and formed, so that the fiber bundle 69 is wound and formed in another forming module.

[0085] Specifically, the rotating module includes a rotating tray 73, a second gearbox 75, a support rod 74, and a rotating motor 76. The winding trolley 2 and the fiber feeding module are both mounted on the rotating tray 73. The second gearbox 75 is fixed to the bottom of the frame body 1, and the rotating motor 76 is connected to the second gearbox 75.

[0086] One end of the support rod 74 is rotatably connected to the second gearbox 75, and the other end of the support rod 74 is fixedly connected to the rotating tray 73.

[0087] Furthermore, after completing one winding molding operation on the molding module at one station, the rotating module drives the winding trolley 2 and its related accessories to rotate, so as to wind the core mold 51 at another station in a timely manner. The driving device is a rotary motor 76, which drives the support rod 74 and the rotating tray 73 to rotate by driving the gear of the second gearbox 75 to meet the requirements of continuous winding.

[0088] In this embodiment of the invention, the monitoring and control module is used to monitor and control the fiber feeding module, the impregnation module, the tension adjustment module, the forming module, and the rotation module respectively, so that the fiber bundle 69 can be automatically wound and formed.

[0089] Specifically, please refer to Figures 2 to 8 The monitoring and control module consists of a servo controller 68, a first temperature sensor 671, a second temperature sensor 672, a tension sensor 41, and other monitoring or control settings. It can realize the speed regulation and recording of the reciprocating motion of the winding carriage 2, the control, monitoring and recording of the temperature of the core tube 64 in the heating mechanism 63, the regulation and recording of the winding speed and winding tension during the winding process, the normal operation of the ring guide head 22 in the winding, pressing, clamping and cutting of yarn, and the accurate rotation of the rotating tray 73.

[0090] Please see Figures 2 to 8The monitoring and control module in the fiber-reinforced polyurethane composite winding molding device 100 provided in this embodiment of the invention monitors and controls the fiber feeding module, impregnation module, tension adjustment module, molding module, and rotation module. The specific process is as follows:

[0091] The monitoring and control module monitors the tension parameters of the tension sensor 41, and the servo controller 68, in conjunction with the tightening state of the fiber bundle 69, adjusts the tension of the fiber bundle 69 to the target value (set value not exceeding 600N) during the winding process. The monitoring and control module controls the start / stop and rotation speed of the first gear motor 47 and the second gear motor 48 to ensure the fiber bundle 69 tension reaches the target value. The monitoring and control module controls the start / stop and direction of the second drive motor 55 to achieve the reciprocating movement of the winding carriage 2. The monitoring and control module controls the opening and closing of the electric regulating valve 65, and simultaneously receives signal feedback from the first temperature sensor 671 and the second temperature sensor 672 to adjust the heating rate (typically 0.5–1℃ / minute), thereby improving the quality of the prepared winding. The monitoring and control module controls the start / stop of the first servo motor 271 and the rotary motor 76 to perform yarn clamping and pressing actions during the winding process, retract the annular guide head 22, and quickly wind another core mold 51 after winding is completed, facilitating continuous winding and improving production efficiency.

[0092] The purpose of this invention is to address the shortcomings and deficiencies of the prior art by designing a fiber-reinforced polyurethane composite winding molding device 100 that allows fibers to be impregnated with resin under sealed conditions and to achieve automatic winding and fiber tension control with a monitoring and control system. It eliminates the need for an additional heating mechanism 63 and directly achieves heating and curing at the winding position, enabling stable continuous winding. This device can effectively improve the quality, efficiency, and accuracy of the wound parts.

[0093] Compared with the prior art, the present invention has the following advantages:

[0094] First, the fiber-reinforced polyurethane composite winding molding device 100 is equipped with an annular guide head 22, which has multiple fourth through holes 26 inside. It winds the mandrel 51 simultaneously, avoiding uneven winding of a single fiber. Furthermore, the annular guide head 22 can be separated into upper and lower parts and is connected by a key. After winding is completed, the rotating tray 73 can continuously wind another mandrel 51 through the rotating winding carriage 2, which greatly improves production efficiency.

[0095] Secondly, the adhesive solution of the fiber-reinforced polyurethane composite winding molding device 100 is prepared on demand. The adhesive solution is in a closed environment during the preparation and impregnation process. The rollerless impregnation method is adopted, and the resin is in a closed environment throughout the process. This avoids the problem of adhesive solution foaming caused by direct contact with air in traditional impregnation tanks, which improves the safety of the fiber-reinforced polyurethane composite winding molding device 100. At the same time, it reduces the occurrence of fiber bundle 69 damage and fuzzing. The wetting status of fiber bundle 69 and resin can be determined through the observation window, so as to adjust the fiber feeding speed of the fiber-reinforced polyurethane composite winding molding device 100 and avoid uneven fiber wetting.

[0096] Third, the forming module of the fiber-reinforced polyurethane composite winding forming device 100 adopts internal heating curing, which can greatly improve the forming efficiency of the winding and reduce the cost, ensure that the resin flows from the inside to the outside, and improve the wettability of the fiber; at the same time, it ensures the discharge of air bubbles, improves the quality of the winding, avoids the problem of different glue content in different sections of the winding caused by glue dripping during the transfer process, and ensures the uniformity of glue in each section.

[0097] Fourth, the tension adjustment module of the fiber-reinforced polyurethane composite winding molding device 100 is equipped with a yarn pressing component 24 and a yarn clamping and cutting component 25. The sliding bracket 37 of the yarn clamping and cutting component 25 is equipped with rollers. By constraining the yarn feeding direction of the fiber, fiber vibration during winding is avoided, and the loss of finished adhesive is reduced.

[0098] Fifth, in the tension adjustment module of the fiber-reinforced polyurethane composite winding molding device 100, a certain tension is generated on the fiber bundle 69 by controlling the rotation inside the first gearbox 42 to prevent the fiber bundle 69 from loosening. This can effectively control the tension of the fiber bundle 69. At the same time, the isolation teeth set by the fifth through hole 421 on the first gearbox 42 can separate each fiber bundle 69, which can effectively avoid the adhesion between the fiber bundles 69 during the tension adjustment process and improve the quality of the fiber winding product.

[0099] Sixth, the semi-circular liquid receiving groove provided below the mandrel 51 in the fiber-reinforced polyurethane composite winding molding device 100 can collect excess adhesive dripping during the winding process, preventing the dripping adhesive from scattering on the ground or other parts and causing unnecessary cleaning problems.

[0100] This invention provides a fiber-reinforced polyurethane composite winding molding device 100, which is arranged in functional modules and works collaboratively between the modules. The heating mechanism 63 of the molding module uses internal heating curing, which facilitates the flow of the adhesive and fiber impregnation, ensuring that the heat and bubbles generated during curing can be discharged in a timely manner. The tension adjustment module has an annular guide head 22 with multiple fourth through holes 26, simultaneously winding the mandrel 51, avoiding uneven winding of single fibers. The annular guide head 22 is detachable, allowing for continuous winding of another mandrel 51 after winding, in conjunction with the rotating tray 73 of the winding carriage 2, greatly improving production efficiency. The impregnation module includes an adhesive preparation mechanism 3 and an impregnation mechanism 4. During adhesive preparation and impregnation, the adhesive is kept in a closed environment throughout, using a rollerless impregnation method. The resin remains in a closed environment throughout, avoiding the problem of direct contact between the adhesive and air in traditional impregnation tanks, which can lead to foaming and improve the safety of the device.

Claims

1. A winding molding apparatus for fiber-reinforced polyurethane composite materials, characterized in that, The device includes a frame body, with forming modules at both ends and a rotating module between them. Above the rotating module are a fiber feeding module, an impregnation module, and a tension adjustment module. The fiber feeding module transports fiber bundles to the impregnation module, impregnates the fiber bundles with resin, and the forming module winds the impregnated fiber bundles. The tension adjustment module adjusts the tension of the fiber bundles transported from the fiber feeding module to the forming module. After the fiber bundles in one forming module are fully wound, the rotating module rotates the fiber feeding module, the impregnation module, and the tension adjustment module to wind the fiber bundles in the other forming module. The fiber-reinforced polyurethane composite winding molding device further includes a monitoring and control module. The monitoring and control module is used to monitor and control the fiber feeding module, the impregnation module, the tension adjustment module, the molding module, and the rotation module respectively, so that the fiber bundle can be automatically wound and molded. The molding module includes a core mold, a heating mechanism, a clamping mechanism, a first drive motor, a fixed sleeve, an adjusting rod, and a rotating handwheel. The core mold is a cylindrical ring mold, and the inner wall of the core mold matches the outer wall of the heating mechanism. The two annular sides of the core mold are clamped by the clamping mechanism. The clamping mechanism includes a first jaw and a second jaw. The output shaft of the first drive motor is connected to the first jaw via a first coupling. The fixed sleeve is fixed to the frame body. The adjusting rod passes through the fixed sleeve and is threaded into the inner wall of the fixed sleeve. One end of the adjusting rod is fixedly connected to the second jaw, and the other end of the adjusting rod is fixedly connected to the rotating handwheel. The rotating handwheel is used to adjust the length of the adjusting rod extending out of the fixed sleeve.

2. The fiber-reinforced polyurethane composite winding molding apparatus according to claim 1, characterized in that, The heating mechanism includes a heating cavity with a hollow structure. Inside the heating cavity is a core tube that is concentrically arranged with the core mold. An electric regulating valve is provided at the inlet of one end of the core tube, and the other end of the core tube is sealed. The outer wall of the core tube is provided with a plurality of first through holes and a plurality of baffles corresponding to the first through holes, and the baffles are arranged at an angle to the outer wall of the core tube.

3. The fiber-reinforced polyurethane composite winding apparatus according to claim 1, characterized in that, The fiber-reinforced polyurethane composite winding molding device further includes a first slide rail disposed below the mandrel. The first slide rail is threadedly connected to the frame body, and a liquid receiving groove is slidably connected on the first slide rail. The liquid receiving groove is used to collect the adhesive dripping from the fiber bundle during the winding process.

4. The fiber-reinforced polyurethane composite winding apparatus according to claim 1, characterized in that, The fiber-reinforced polyurethane composite winding molding device also includes multiple lead screws, with both ends of each lead screw fixed to the upper end of the frame body; The impregnation module includes a winding carriage and a second drive motor. The winding carriage has multiple second through holes at its bottom, and each lead screw passes through a corresponding second through hole. The second drive motor is connected to one of the lead screws through a second coupling, and the second drive motor is used to drive the winding carriage to reciprocate along the length direction parallel to the lead screw.

5. The fiber-reinforced polyurethane composite winding apparatus according to claim 4, characterized in that, The impregnation module includes an adhesive-making mechanism and an impregnation mechanism, both fixedly mounted on the winding trolley. The adhesive-making mechanism includes an A material tank, a B material tank, an inlet head, and a first flow control valve. The A material tank and the B material tank are respectively fixed on the winding trolley by adhesive-making brackets. The A material tank and the B material tank are respectively connected to the preparation chamber through adhesive delivery pipes. A rotating paddle is provided in the preparation chamber. One end of the inlet head is connected to the preparation chamber, and the other end of the inlet head is connected to the impregnation mechanism. The first flow control valve is installed on the inlet head and is used to control the flow rate of the adhesive liquid in the adhesive-making mechanism into the impregnation mechanism.

6. The fiber-reinforced polyurethane composite winding apparatus according to claim 5, characterized in that, The impregnation mechanism includes a sealed impregnation tank with an impregnation chamber. The sealed impregnation tank includes a top tank, a middle tank, and a bottom tank. One end of the middle tank is detachably connected to the top tank, and the other end of the middle tank is detachably connected to the bottom tank. A glue reserve chamber is provided at the top of the top tank. A rotating nozzle is provided at the top of the impregnation chamber. The bottom of the impregnation chamber is connected to one end of a return pipe. The impregnation tank has multiple third through holes on its wall surface, and the third through holes on the wall surface away from the impregnation tank have curved channels; the other end of the return pipe is connected to the glue preparation chamber, and a self-priming pump and a second flow control valve are installed on the return pipe.

7. The fiber-reinforced polyurethane composite winding apparatus according to claim 5, characterized in that, The tension adjustment module includes a yarn guide mechanism fixed on the winding trolley. The yarn guide mechanism includes a yarn nozzle, a retractable annular yarn guide head, a yarn pressing assembly, and a yarn clamping and cutting assembly. The yarn nozzle is located between the mandrel and the impregnation mechanism. The annular yarn guide head includes multiple fourth through holes. The annular yarn guide head is bolted to the winding trolley via three movable rods. The yarn pressing assembly and the yarn clamping and cutting assembly are slidably connected to the annular yarn guide head. The yarn pressing assembly is used to press the fiber bundle tightly onto the surface of the mandrel. The yarn clamping and cutting assembly is used to perform yarn clamping or yarn cutting processes on the fiber bundle. When the core mold passes through the annular guide head, the fiber bundle is wound around the core mold through the fourth through hole.

8. The fiber-reinforced polyurethane composite winding apparatus according to claim 7, characterized in that, The tension adjustment module further includes a tension adjustment mechanism fixed on the winding trolley. The tension adjustment mechanism is located between the impregnation mechanism and the yarn nozzle. The tension adjustment mechanism includes a guide roller assembly, a first gearbox, a guide rod, and a gear motor assembly connected to the first gearbox. The gear motor assembly is used to drive the gears in the first gearbox to rotate to tighten the fiber bundle. The first gearbox includes a fifth through hole, the guide rod includes a guide hole, and the guide roller assembly includes a first guide roller and a second guide roller; the fiber bundle wound on the first guide roller passes through the fifth through hole and the guide hole respectively and is wound on the second guide roller.

9. The fiber-reinforced polyurethane composite winding apparatus according to claim 4, characterized in that, The rotating module includes a rotating tray, a second gearbox, a support rod, and a rotating motor. The winding trolley and the fiber feeding module are both mounted on the rotating tray. The second gearbox is fixed to the bottom of the main frame body, and the rotating motor is connected to the second gearbox. One end of the support rod is rotatably connected to the second gearbox, and the other end of the support rod is fixedly connected to the rotating tray.

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