Intelligent sensing composite material curing forming mold, system and method

Abstract

The application discloses a curing forming mold, a system and a method of intelligent sensing composite material, and belongs to the field of intelligent composite material.The mold is characterized in that a top plate, upper and lower middle frames and a bottom plate are detachably and fixedly connected, glue inlet holes and glue outlet holes are formed in the top plate, fabric placing grooves are formed in corresponding positions of the upper and lower middle frames, a plurality of pairs of sensing electrode inlets and outlets are formed in corresponding positions of the upper surface of the upper middle frame and the lower surface of the lower middle frame, and hollow capillary glue pipes are arranged in each pair of sensing electrode inlets and outlets.The system is characterized in that one end of a glue injection pipe is arranged in a glue injection device, the other end of the glue injection pipe is connected with the glue inlet holes through a vacuum flow guide joint, one end of a glue outlet pipe is arranged in a resin collecting system, the other end of the glue outlet pipe is connected with the glue outlet holes through a vacuum flow guide joint two, and the two ends of a vacuum air exhaust pipe are respectively communicated with a vacuum control system and the resin collecting system.The method is characterized in that a dried preform is placed in the fabric placing groove, the mold is assembled, curing forming is carried out, and a test sample is obtained.The application is used for curing forming of the intelligent sensing composite material.

Description

Technical Field

[0001] This invention belongs to the field of intelligent composite materials, and specifically relates to a curing mold, system and method for intelligent sensing composite materials. Background Technology

[0002] With the widespread application of composite materials in advanced fields such as aerospace, the requirements for composite materials have gradually shifted from structural-functional integration to structural-intelligent-functional integration. Realizing the intelligent application of composite materials is of great importance to the development of composite materials. Generally, intelligent sensing composite materials are usually prepared in three ways: (1) embedding the sensing material in the fiber fabric and performing hand lay-up or resin impregnation on the whole; (2) embedding the sensing material in the fiber fabric and performing vacuum induction molding on the fabric; (3) integrating the sensing material into the prepreg and performing lay-up and curing molding.

[0003] While hand lay-up or resin impregnation processes offer the advantage of being convenient and quick, the cured products typically have a lower fiber volume content and more internal pores, resulting in mechanical properties that are generally far inferior to those of products cured using common resin transfer molding (RTM) processes. Furthermore, traditional RTM curing processes cannot achieve normal signal output from the electrodes at both ends of the smart sensing material. In addition, the preparation of specimens using this process is heavily influenced by manual operation, leading to significant performance variations between different batches of specimens.

[0004] Vacuum induction molding improves the physical and mechanical properties of specimens compared to hand lay-up or resin impregnation processes. However, because the vacuum bag is a flexible film, this process cannot directly control the specimen thickness and fiber volume content.

[0005] The prepreg layup curing process, which typically involves hot pressing to cure prepreg materials, is a simple and efficient molding method. However, this method is limited to molding two-dimensional layup composites and is not feasible for molding advanced structural composites such as three-dimensional woven materials. Furthermore, the smart sensing electrodes exposed to the high-temperature environment during hot pressing are highly susceptible to damage.

[0006] Therefore, researching a curing mold, system, and method for intelligent sensing composite materials is crucial to ensuring the successful intelligent application of composite materials under various working conditions. Summary of the Invention

[0007] One objective of this invention is to provide a curing mold for intelligent sensing composite materials. This mold possesses excellent airtightness and flexibility, making it suitable for curing intelligent composite materials with different direct sensing electrodes. It ensures that the material electrodes are unaffected by external factors and output effective signals. Simultaneously, it can precisely control the thickness of the sample, ensuring sufficient and stable mechanical properties. Furthermore, the mold offers strong manufacturing flexibility and can be reused repeatedly over a long period, resulting in a long service life.

[0008] A second objective of this invention is to provide a curing and molding system for intelligent sensing composite materials. This system possesses excellent airtightness, being a closed-mold system that draws out air. This system allows for thorough resin impregnation of the sample, reducing material porosity, significantly increasing the fiber volume content of the composite material, and enhancing the physical and mechanical properties of the sample. Furthermore, the curing and molding system is flexible and controllable, effectively reducing the performance variation between different batches of samples.

[0009] A third objective of this invention is to provide a curing method for intelligent sensing composite materials. This method can ensure the effectiveness of the output signal from the electrodes of the intelligent sensing composite material and the quality and stability of the mechanical properties of the final cured product.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0011] A curing mold for an intelligent sensing composite material is disclosed. The mold includes a top plate, an upper middle frame, a lower middle frame, a bottom plate, a sealing ring, and a hollow capillary tube. The top plate, upper middle frame, lower middle frame, and bottom plate are stacked from top to bottom and are detachably fixedly connected. The top plate has an inlet hole and an outlet hole. Corresponding positions on the upper and lower middle frames are respectively provided with fabric placement grooves. The outer edge of the fabric placement groove of the upper middle frame is provided with a sealing groove, and a sealing ring is placed in the sealing groove. The inlet hole and outlet hole correspond to the fabric placement groove. The lower surface of the upper middle frame and the upper surface of the lower middle frame are respectively provided with multiple pairs of sensing electrode inlets and outlets communicating with their respective fabric placement grooves. The multiple pairs of sensing electrode inlets and outlets are symmetrically arranged with respect to their respective fabric placement grooves.

[0012] Furthermore, the top plate has two removal holes near the left end, and the upper middle frame has two removal holes near the left end, which correspond one-to-one with the top plate removal holes. The lower middle frame has two removal holes near the right end, and the bottom plate has two removal holes near the right end, which correspond one-to-one with the lower middle frame removal holes.

[0013] Furthermore, a threaded hole is provided at the right end of the top plate and a threaded hole is provided at the left end of the bottom plate, with two bolts tightened into the threaded holes of the top plate and the bottom plate respectively; a threaded hole is provided at the right end of the upper middle frame and a threaded hole is provided at the left end of the lower middle frame, with one bolt tightened into the threaded holes of the upper middle frame and the lower middle frame respectively.

[0014] A curing and molding system for intelligent sensing composite materials, the system comprising a glue injection device, a curing and molding mold, a resin collection system, and a vacuum control system; one end of a glue injection tube is placed inside the glue injection device, and the other end of the glue injection tube is connected to one end of a vacuum guide connector, the other end of which is connected to the glue inlet of the curing and molding mold; one end of a glue outlet tube is placed inside the resin collection system, and the other end of the glue outlet tube is connected to one end of a vacuum guide connector, the other end of which is connected to the glue outlet of the curing and molding mold; one end of a vacuum extraction tube is connected to the vacuum control system, and the other end of the vacuum extraction tube is connected to the resin collection system.

[0015] A curing and molding method for intelligent sensing composite materials, the method being implemented using a curing and molding system, the method comprising the following steps:

[0016] Step 1: Prepare a three-dimensional woven smart textile preform with multiple pairs of sensing electrodes. The size of the preform is consistent with the size of the fabric placement groove. Place the preform in a drying oven to dry at a temperature of 50℃-60℃ for 3-5 hours.

[0017] Step 2: Wipe and clean all surfaces of the cured mold with alcohol and let it dry;

[0018] Step 3: Apply release agent evenly to the top surface of the base plate, the upper middle frame, and the lower middle frame multiple times, and wait for the release agent to form a film;

[0019] Step 4: After the release agent forms a film, place the base plate at the bottom, place the lower middle frame on the top of the base plate, place the dried preform into the fabric placement groove of the lower middle frame, and coat the exposed multiple pairs of sensing electrodes with PU coating before they are passed out through the hollow capillary tube.

[0020] Step 5: Place the upper middle frame on top of the lower middle frame so that the prefabricated part matches the fabric placement groove of the upper middle frame;

[0021] Step Six: Place the sealing ring into the sealing groove according to its shape;

[0022] Step 7: Place the top plate on the upper middle frame, and fasten the top plate, upper middle frame, lower middle frame and bottom plate together with multiple bolts and nuts;

[0023] Step 8: Tighten bolt 2 into the threaded holes of the top plate and bottom plate respectively; tighten bolt 1 into the threaded holes of the upper middle frame and lower middle frame respectively.

[0024] Step 9: Assemble the curing mold with the curing system. After assembly, move the curing mold into the oven for curing.

[0025] Step 10: After the curing time in Step 9 is over, turn off the oven, let the cured mold cool to room temperature, and then remove it from the oven to remove the mold, thus obtaining the intelligent sensing composite material.

[0026] Furthermore, the specific steps of step nine are as follows:

[0027] Step 91: Place one end of the dispensing tube inside the resin curing agent in the dispensing device, connect the other end of the dispensing tube to one end of the vacuum guide connector, and connect the other end of the vacuum guide connector to the glue inlet of the curing mold; place one end of the dispensing tube inside the resin collection system, connect the other end of the dispensing tube to one end of the vacuum guide connector, and connect the other end of the vacuum guide connector to the glue outlet of the curing mold.

[0028] Step 92: Tightly seal the outer side of the sensing electrode with the inlet and outlet of the sensing electrode and the end of the hollow capillary tube using high-temperature sealing black glue to prevent air leakage;

[0029] Step 93: Connect both ends of the vacuum pumping tube to the resin collection system and the vacuum control system, respectively;

[0030] Step 94: Turn on the vacuum control system and set the vacuum pressure and flow rate. The vacuum pressure is 0.07-0.1MPa. Vacuum introduce the resin curing agent into the preform.

[0031] Step 95: When the irregular small air bubbles in the dispensing tube disappear and uniform and stable air bubbles appear, stop the vacuum introduction of resin curing agent. Use the air stop valve to clamp the dispensing tube and the dispensing tube, then pull out the dispensing tube and the dispensing tube, and then plug both ends with high-temperature sealing black glue.

[0032] Step 96: Place the cured mold into an oven for curing.

[0033] Furthermore, in step nine-four, the resin curing agent consists of 100 parts epoxy resin and 85 parts curing agent by weight; the epoxy resin and curing agent are stirred and mixed evenly, and then degassed in a degassing instrument to form the resin curing agent used.

[0034] Furthermore, in step nine-six, the curing temperature and time are: 90℃ for 2 hours, 110℃ for 1 hour, and 135℃ for 6 hours.

[0035] Furthermore, in step ten, the process of disassembling the mold body is as follows:

[0036] Twist the bolt three into the top plate disassembly hole one and the top plate disassembly hole two respectively. As the knob is turned, the bolt three passes through the upper middle frame disassembly hole one and the upper middle frame disassembly hole two. At the same time, twist the bolt three into the bottom plate disassembly hole one and the bottom plate disassembly hole two respectively. As the knob is turned, the bolt three passes through the lower middle frame disassembly hole one and the lower middle frame disassembly hole two. By contacting and pressing the bolt three with the surfaces of the upper middle frame and the lower middle frame respectively, the upper middle frame and the lower middle frame are separated, thus obtaining the intelligent sensing composite material.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] (1) The present invention provides a curing mold for intelligent sensing composite materials. The mold is suitable for simultaneously curing intelligent composite materials with different direct sensing electrodes, ensuring that the electrodes of the intelligent composite materials are not affected by external factors and output effective signals; it can accurately control the thickness of the sample (i.e. intelligent composite material) to ensure that the sample has sufficient and stable mechanical properties; at the same time, the mold has strong manufacturing flexibility, can be reused for a long time, and has a long service life.

[0039] (2) This invention provides a curing and molding system for intelligent sensing composite materials. This system has good airtightness and is a closed-mold system that draws out air, enabling the sample to be fully impregnated with resin, reducing the void content of the material, greatly increasing the fiber volume content of the composite material, and enhancing the physical and mechanical properties of the sample. This curing and molding system is flexible and controllable, and can effectively reduce the dispersion of the performance of different batches of sample (because the parameters such as fabric thickness, vacuum pressure, and airtightness can be fixed during curing, ensuring that these parameters are consistent each time they are cured, it can effectively reduce the error between the thickness, surface flatness, and mechanical properties of different batches of sample).

[0040] (3) This invention provides a curing and molding method for intelligent sensing composite materials. This curing and molding method combines the advantages of traditional vacuum induction and RTM molding processes. It has the advantages of simple and convenient operation of vacuum induction molding process, while RTM molding process can directly control the fiber volume content of the sample, which can ensure the effectiveness and stability of the mechanical properties of the final sample. In addition, the mold closing and demolding process of this method is simple and easy to operate, and it is not easy to cause product edge damage due to demolding. Attached Figure Description

[0041] Figure 1 An exploded view of a curing mold for an intelligent sensing composite material according to the present invention;

[0042] Figure 2This is an assembly diagram of a curing mold for an intelligent sensing composite material according to the present invention.

[0043] Figure 3 This is an isometric view of the top plate of a curing mold for an intelligent sensing composite material according to the present invention.

[0044] Figure 4 This is an isometric view of the upper middle frame of a curing mold for an intelligent sensing composite material according to the present invention.

[0045] Figure 5 This is an isometric view of the lower middle frame of a curing mold for an intelligent sensing composite material according to the present invention.

[0046] Figure 6 for Figure 5 The left view;

[0047] Figure 7 This is an isometric view of the base plate of a curing mold for an intelligent sensing composite material according to the present invention.

[0048] Figure 8 for Figure 7 The left view;

[0049] Figure 9 A top view of the sealing ring of a curing mold for an intelligent sensing composite material;

[0050] Figure 10 A structural diagram of a hollow capillary tube in a curing mold for an intelligent sensing composite material;

[0051] Figure 11 This is a schematic diagram of a curing and molding system for an intelligent sensing composite material according to the present invention.

[0052] The component names and reference numerals in the above figures are as follows:

[0053] 1. Bolt 1, 2. Nut 1, 3. Bolt 2, 4. Bolt 3, 5. Top plate, 6. Upper middle frame, 7. Lower middle frame, 8. Bottom plate, 9. Top plate removal hole 1, 10. Glue inlet hole, 11. Top plate removal hole 2, 12. Sensor electrode inlet / outlet, 13. Glue outlet hole, 14. Top plate through hole, 15. Top plate threaded hole, 16. Sealing groove, 17. Upper middle frame through hole, 18. Fabric placement groove, 19. Upper middle frame removal hole 2, 20. Upper middle frame threaded hole, 21. Lower middle frame through hole, 22. Lower middle frame removal hole 1, 23. Lower middle frame through hole, 24. Frame disassembly hole 24, lower middle frame threaded hole 25, bottom plate through hole 26, bottom plate disassembly hole 1 27, bottom plate disassembly hole 28, bottom plate threaded hole 29, sealing ring 30, hollow capillary tube 31, glue injection tube 32, glue injection device 33, resin curing agent 34, vacuum guide joint 1 35, high temperature sealing black glue 36, sensing electrode 37, curing molding mold 38, vacuum guide joint 2 39, glue outlet tube 40, vacuum extraction tube 41, resin collection system 42, vacuum control system 43.

[0054] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0055] Specific implementation method one: as follows Figures 1-10 As shown, this embodiment describes a curing mold for an intelligent sensing composite material. The mold includes a top plate 5, an upper middle frame 6, a lower middle frame 7, a bottom plate 8, a sealing ring 30, and a hollow capillary tube 31.

[0056] The top plate 5, upper middle frame 6, lower middle frame 7, and bottom plate 8 are stacked from top to bottom and can be detachably fixed together. (The top plate 5, upper middle frame 6, lower middle frame 7, and bottom plate 8 are provided with multiple top plate through holes 14, multiple upper middle frame through holes 17, multiple lower middle frame through holes 22, and multiple bottom plate through holes 26 near their respective four edges. The multiple top plate through holes 14, multiple upper middle frame through holes 17, multiple lower middle frame through holes 22, and multiple bottom plate through holes 26 are arranged one-to-one. Bolts 3 4 are inserted into the top plate through holes 14, upper middle frame through holes 17, lower middle frame through holes 22, and bottom plate through holes 26, and the top plate 5, upper middle frame 6, lower middle frame 7, and bottom plate 8 are detachably fixed together by locking with nuts 1 2.) The top plate 5 is provided with a glue inlet hole 10 and a glue outlet hole 13 (for resin inlet and outlet).

[0057] Fabric placement grooves 18 are respectively provided at corresponding positions of the upper middle frame 6 and the lower middle frame 7 (preferably, the fabric placement grooves 18 are respectively provided in the middle of the upper middle frame 6 and the lower middle frame 7). A sealing groove 16 is provided on the outer edge of the fabric placement groove 18 of the upper middle frame 6. A sealing ring 30 is placed in the sealing groove 16. The glue inlet hole 10 and the glue outlet hole 13 are corresponding to the fabric placement groove 18. Multiple pairs of sensor electrode inlets and outlets 12 communicating with their respective fabric placement grooves 18 are respectively provided on the lower surface of the upper middle frame 6 and the upper surface of the lower middle frame 7. The multiple pairs of sensor electrode inlets and outlets 12 are symmetrically arranged with respect to their respective fabric placement grooves 18 (preferably 10 pairs of sensor electrode inlets and outlets 12 are used). The multiple pairs of sensor electrode inlets and outlets 12 of the upper middle frame 6 correspond one-to-one with the multiple pairs of sensor electrode inlets and outlets 12 of the lower middle frame 7. A hollow capillary tube 31 is provided in each pair of sensor electrode inlets and outlets 12 (used to protect and lead out the sensor electrode 37 during the curing process).

[0058] Furthermore, the top plate 5 has a top plate disassembly hole 9 and a top plate disassembly hole 11 near the left end, and the upper middle frame 6 has an upper middle frame disassembly hole 19 and an upper middle frame disassembly hole 20 near the left end. The upper middle frame disassembly hole 19 and the upper middle frame disassembly hole 20 correspond one-to-one with the top plate disassembly hole 9 and the top plate disassembly hole 21 respectively (for use in conjunction with the top plate disassembly hole 9 and the top plate disassembly hole 21 for mold removal).

[0059] The lower middle frame 7 has two disassembly holes, 23 and 24, near the right end. The bottom plate 8 has two disassembly holes, 27 and 28, near the right end. The disassembly holes 27 and 28 correspond one-to-one with the lower middle frame disassembly holes 23 and 24, respectively (for disassembly). The top plate disassembly holes 9, 11, 27, and 28 are all threaded holes. The upper middle frame disassembly holes 19, 20, 23, and 24 are all through holes.

[0060] Furthermore, the top plate 5 has a top plate threaded hole 15 on its right end, and the bottom plate 8 has a bottom plate threaded hole 29 on its left end. Bolt 23 is screwed into the top plate threaded hole 15 and the bottom plate threaded hole 29 respectively. The upper middle frame 6 has an upper middle frame threaded hole 21 on its right end, and the lower middle frame 7 has a lower middle frame threaded hole 25 on its left end. Bolt 1 is screwed into the upper middle frame threaded hole 21 and the lower middle frame threaded hole 25 respectively.

[0061] Specific implementation method two: such as Figures 1-11 As shown, this embodiment is a curing and molding system for intelligent sensing composite materials that includes the curing and molding mold described in Embodiment 1. The system includes a glue injection device 33, a curing and molding mold 38, a resin collection system 42, and a vacuum control system 43.

[0062] One end of the injection tube 32 is placed inside the injection device 33, and the other end of the injection tube 32 is connected to one end of the vacuum guide connector 35. The other end of the vacuum guide connector 35 is connected to the glue inlet hole 10 of the curing mold 38 (the resin curing agent 34 in the injection device 33 is injected into the curing mold 38 through the injection tube 32 and the vacuum guide connector 35).

[0063] One end of the dispensing tube 40 is placed inside the resin collection system 42, and the other end of the dispensing tube 40 is connected to one end of the vacuum guide connector 39. The other end of the vacuum guide connector 39 is connected to the dispensing hole 13 of the curing mold 38.

[0064] One end of the vacuum extraction pipe 41 is connected to the vacuum control system 43, and the other end of the vacuum extraction pipe 41 is connected to the resin collection system 42 (to ensure the vacuum of the entire system and to extract the excess resin curing agent 34 from the curing mold 38).

[0065] Specific implementation method three: such as Figures 1-11 As shown, a curing and molding method for an intelligent sensing composite material is disclosed. The method utilizes the curing and molding system described in claim 4, and includes the following steps:

[0066] Step 1: Prepare a three-dimensional woven smart textile preform with multiple pairs of sensing electrodes 37 (after the multiple pairs of sensing electrodes 37 are woven into the three-dimensional woven smart textile preform, a part of them protrudes and is exposed on the outside). The size of the preform is consistent with the size of the fabric placement groove 18. Place the preform in a drying oven to dry it. The drying temperature is 50℃-60℃ and the drying time is 3-5 hours.

[0067] Step 2: Wipe and clean each surface of the cured molding mold 38 with alcohol and let it dry (use a wiping paper soaked in alcohol to wipe and clean each surface of the cured molding mold 38, and wait for the surface to dry);

[0068] Step 3: Apply release agent evenly to the upper surface of the base plate 8, the upper middle frame 6 and the lower middle frame 7 multiple times, and wait for the release agent to form a film (apply release agent in small amounts evenly, and repeat the application 2-3 times).

[0069] Step 4: After the release agent forms a film, place the base plate 8 at the bottom layer, place the lower middle frame 7 on top of the base plate 8, place the dried preform into the fabric placement groove 18 of the lower middle frame 7, and coat the exposed multiple pairs of sensing electrodes 37 with PU coating and then pass them out through the hollow capillary tube 31 (it is worth noting that the hollow capillary tube 31 can be flexibly replaced according to the different sensing electrodes 37).

[0070] Step 5: Place the upper middle frame 6 on top of the lower middle frame 7 so that the prefabricated part matches the fabric placement groove 18 of the upper middle frame 6;

[0071] Step 6: Place the sealing ring 30 into the sealing groove 16 according to the mold shape (to enhance the airtightness of the mold);

[0072] Step 7: Place the top plate 5 on the upper middle frame 6, and fasten the top plate 5, upper middle frame 6, lower middle frame 7 and bottom plate 8 together with multiple bolts 3 4 and nuts 1 2.

[0073] Step 8: Tighten bolt 23 into the threaded hole 15 of the top plate 5 and the threaded hole 29 of the bottom plate 8 respectively; tighten bolt 1 into the threaded hole 21 of the upper middle frame 6 and the threaded hole 25 of the lower middle frame 7 respectively (bolt 23 and bolt 11 are used for dragging when disassembling and assembling the mold).

[0074] Step 9: Assemble the curing mold 38 with the curing system. After assembly, move the curing mold 38 into the oven for curing.

[0075] Step 10: After the curing time in Step 9 is over, turn off the oven, place the cured molding mold 38 to cool to room temperature, and then remove it from the oven to demold, thus obtaining the intelligent sensing composite material (i.e., the sample).

[0076] Furthermore, the specific steps of step nine are as follows:

[0077] Step 91: Place one end of the dispensing tube 32 inside the resin curing agent 34 in the dispensing device 33, and connect the other end of the dispensing tube 32 to one end of the vacuum guide connector 35. The other end of the vacuum guide connector 35 is connected to the glue inlet 10 of the curing mold 38. Place one end of the dispensing tube 40 inside the resin collection system 42 (for collecting excess resin curing agent 34), and connect the other end of the dispensing tube 40 to one end of the vacuum guide connector 39. The other end of the vacuum guide connector 39 is connected to the glue outlet 13 of the curing mold 38.

[0078] Step 92: Use high-temperature sealing black glue 36 to tightly seal the outer side of the sensing electrode 37 with the sensing electrode inlet / outlet 12 and the end of the hollow capillary tube 31 to prevent air leakage.

[0079] Step 93: Connect both ends of the vacuum extraction pipe 41 to the resin collection system 42 and the vacuum control system 43 respectively (and check the airtightness of the entire device);

[0080] Step 94: Turn on the vacuum control system 43 and set the vacuum pressure and flow rate. The vacuum pressure is 0.07-0.1MPa (the flow rate is determined by the air pressure). Vacuum introduce the resin curing agent 34 into the preform.

[0081] Step 95: When the irregular small bubbles in the dispensing tube 40 disappear and uniform and stable bubbles appear, stop the vacuum introduction of resin curing agent 34, clamp the dispensing tube 32 and dispensing tube 40 with the air stop valve, then pull out the dispensing tube 32 and dispensing tube 40, and then plug both ends with high temperature sealing black glue 36 (to prevent excess air from entering the curing mold 38).

[0082] Step 96: Place the cured molding mold 38 into the oven for curing.

[0083] Furthermore, in step nine-four, the resin curing agent 34, by weight, consists of 100 parts epoxy resin and 85 parts curing agent; the epoxy resin and curing agent are stirred and mixed evenly, and degassed in a degassing instrument to form the resin curing agent 34 used (ensuring the quality and performance of the resin curing agent).

[0084] Furthermore, in step nine-six, the curing temperature and time are: 90℃ for 2 hours, 110℃ for 1 hour, and 135℃ for 6 hours. The curing process is carried out at different temperature stages; such temperature and time settings help achieve the best curing effect for the composite material.

[0085] Furthermore, in step ten, the process of disassembling the mold body is as follows:

[0086] Bolt 34 is screwed into the top plate disassembly hole 19 and the top plate disassembly hole 21 respectively. As the screw is screwed in, bolt 34 passes through the upper middle frame disassembly hole 19 and the upper middle frame disassembly hole 20. At the same time, bolt 34 is screwed into the bottom plate disassembly hole 17 and the bottom plate disassembly hole 28 respectively. As the screw is screwed in, bolt 34 passes through the lower middle frame disassembly hole 13 and the lower middle frame disassembly hole 24. Through the contact and compression of bolt 34 with the surfaces of the upper middle frame 6 and the lower middle frame 7 respectively, the upper middle frame 6 and the lower middle frame 7 are separated, thus obtaining the intelligent sensing composite material.

[0087] The inner diameter of the hollow capillary tube 31 is 0.7 mm. The inner diameter is generally the same as the diameter of the sensing electrode, and a positive error of less than 0.2 mm is allowed.

[0088] This invention allows for easy separation of the mold and the acquisition of intelligent sensing composite materials through specific bolt tightening and loosening steps, while avoiding damage to the product edges.

[0089] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0090] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A curing and molding system for intelligent sensing composite materials, characterized in that: The system includes a glue injection device (33), a curing mold (38), a resin collection system (42), and a vacuum control system (43); one end of the glue injection tube (32) is placed inside the glue injection device (33), and the other end of the glue injection tube (32) is connected to one end of a vacuum guide connector (35), and the other end of the vacuum guide connector (35) is connected to the glue inlet hole (10) of the curing mold (38); one end of the glue outlet tube (40) is placed inside the resin collection system (42), and the other end of the glue outlet tube (40) is connected to one end of a vacuum guide connector (39), and the other end of the vacuum guide connector (39) is connected to the glue outlet hole (13) of the curing mold (38); one end of the vacuum extraction tube (41) is connected to the vacuum control system (43), and the other end of the vacuum extraction tube (41) is connected to the resin collection system (42); The curing mold (38) includes a top plate (5), an upper middle frame (6), a lower middle frame (7), and a bottom plate (8); the top plate (5), the upper middle frame (6), the lower middle frame (7), and the bottom plate (8) are stacked from top to bottom and can be detachably fixedly connected. The top plate (5) is provided with an inlet hole (10) and an outlet hole (13); the upper middle frame (6) and the lower middle frame (7) are respectively provided with fabric placement grooves (18) at corresponding positions. The outer edge of the fabric placement groove (18) of the upper middle frame (6) is provided with a sealing groove (16), and a sealing ring (30) is placed in the sealing groove (16). The glue inlet (10) and glue outlet (13) correspond to the fabric placement slot (18). The lower surface of the upper middle frame (6) and the upper surface of the lower middle frame (7) are respectively provided with multiple pairs of sensor electrode inlets and outlets (12) that communicate with their respective fabric placement slots (18). The multiple pairs of sensor electrode inlets and outlets (12) are symmetrically arranged relative to their respective fabric placement slots (18). The multiple pairs of sensor electrode inlets and outlets (12) of the upper middle frame (6) correspond one-to-one with the multiple pairs of sensor electrode inlets and outlets (12) of the lower middle frame (7). A hollow capillary tube (31) is provided in each pair of sensor electrode inlets and outlets (12).

2. The curing and molding system for intelligent sensing composite materials according to claim 1, characterized in that: The top plate (5) has a top plate disassembly hole 1 (9) and a top plate disassembly hole 2 (11) near the left end. The upper middle frame (6) has an upper middle frame disassembly hole 1 (19) and an upper middle frame disassembly hole 2 (20) near the left end. The upper middle frame disassembly hole 1 (19) and the upper middle frame disassembly hole 2 (20) correspond one-to-one with the top plate disassembly hole 1 (9) and the top plate disassembly hole 2 (11) respectively. The lower middle frame (7) has a lower middle frame disassembly hole 1 (23) and a lower middle frame disassembly hole 2 (24) near the right end. The bottom plate (8) has a bottom plate disassembly hole 1 (27) and a bottom plate disassembly hole 2 (28) near the right end. The bottom plate disassembly hole 1 (27) and the bottom plate disassembly hole 2 (28) correspond one-to-one with the lower middle frame disassembly hole 1 (23) and the lower middle frame disassembly hole 2 (24) respectively.

3. The curing and molding system for intelligent sensing composite materials according to claim 1, characterized in that: The top plate (5) has a top plate threaded hole (15) on the right end and the bottom plate (8) has a bottom plate threaded hole (29) on the left end. Bolt 2 (3) is screwed into the top plate threaded hole (15) and the bottom plate threaded hole (29) respectively. The upper middle frame (6) has an upper middle frame threaded hole (21) on the right end and the lower middle frame (7) has a lower middle frame threaded hole (25) on the left end. Bolt 1 (1) is screwed into the upper middle frame threaded hole (21) and the lower middle frame threaded hole (25) respectively.

4. A curing and molding method for an intelligent sensing composite material, characterized in that: The method is implemented using the curing and molding system according to any one of claims 1-3, and the method includes the following steps: Step 1: Prepare a three-dimensional woven smart textile preform with multiple pairs of sensing electrodes (37). The size of the preform is consistent with the size of the fabric placement groove (18). Place the preform in a drying oven to dry. The drying temperature is 50℃-60℃ and the drying time is 3-5h. Step 2: Wipe and clean all surfaces of the cured molding mold (38) with alcohol and let it dry; Step 3: Apply release agent evenly to the upper surface of the base plate (8), the upper middle frame (6) and the lower middle frame (7) multiple times, and wait for the release agent to form a film; Step 4: After the release agent forms a film, place the base plate (8) at the bottom layer and the lower middle frame (7) on top of the base plate (8). Place the dried preform into the fabric placement groove (18) of the lower middle frame (7), and coat the exposed multiple pairs of sensing electrodes (37) with PU coating and then pass them out through the hollow capillary tube (31). Step 5: Place the upper middle frame (6) on top of the lower middle frame (7) so that the prefabricated part matches the fabric placement groove (18) of the upper middle frame (6); Step 6: Place the sealing ring (30) into the sealing groove (16) according to its shape; Step 7: Place the top plate (5) on the upper middle frame (6), and fasten the top plate (5), upper middle frame (6), lower middle frame (7) and bottom plate (8) together with multiple bolts (4) and nuts (2); Step 8: Tighten bolt 2 (3) into the top plate threaded hole (15) of the top plate (5) and the bottom plate threaded hole (29) of the bottom plate (8); Tighten bolt 1 (1) into the upper middle frame threaded hole (21) of the upper middle frame (6) and the lower middle frame threaded hole (25) of the lower middle frame (7); Step 9: Assemble the curing mold (38) with the curing system. After assembly, move the curing mold (38) into the oven for curing. Step 10: After the curing time in Step 9 is over, turn off the oven, place the cured molding mold (38) to cool to room temperature, and then remove it from the oven to remove the mold and obtain the intelligent sensing composite material.

5. The curing and molding method for an intelligent sensing composite material according to claim 4, characterized in that: The specific steps for step nine are as follows: Step 91: Place one end of the injection tube (32) inside the resin curing agent (34) in the injection device (33), connect the other end of the injection tube (32) to one end of the vacuum guide connector (35), and connect the other end of the vacuum guide connector (35) to the glue inlet (10) of the curing mold (38); place one end of the dispensing tube (40) inside the resin collection system (42), connect the other end of the dispensing tube (40) to one end of the vacuum guide connector (39), and connect the other end of the vacuum guide connector (39) to the glue outlet (13) of the curing mold (38); Step 92: Use high-temperature sealing black glue (36) to tightly seal the outer side of the sensing electrode (37) with the sensing electrode inlet / outlet (12) and the end of the hollow capillary tube (31) to prevent air leakage; Step 93: Connect both ends of the vacuum pumping pipe (41) to the resin collection system (42) and the vacuum control system (43) respectively; Step 94: Turn on the vacuum control system (43) and set the vacuum pressure and flow rate. The vacuum pressure is 0.07-0.1MPa. Vacuum introduce the resin curing agent (34) into the preform. Step 95: When the irregular small bubbles in the dispensing tube (40) disappear and uniform and stable bubbles appear, stop the vacuum introduction of resin curing agent (34), clamp the dispensing tube (32) and dispensing tube (40) with the air stop valve, then pull out the dispensing tube (32) and dispensing tube (40), and then plug both ends with high temperature sealing black glue (36); Step 96: Place the cured molding mold (38) into the oven for curing.

6. The curing and molding method for an intelligent sensing composite material according to claim 4, characterized in that: In step nine four, the resin curing agent (34) consists of 100 parts epoxy resin and 85 parts curing agent by weight; the epoxy resin and curing agent are stirred and mixed evenly, and degassed in a degassing instrument to form the resin curing agent (34) used.

7. The curing and molding method for an intelligent sensing composite material according to claim 4, characterized in that: In step 96, the curing temperature and time are: 90℃ for 2 hours, 110℃ for 1 hour, and 135℃ for 6 hours.

8. The curing and molding method for an intelligent sensing composite material according to claim 4, characterized in that: In step ten, the process of disassembling the mold body is as follows: Twist the bolt three (4) into the top plate disassembly hole one (9) and the top plate disassembly hole two (11) respectively. As the knob is turned, the bolt three (4) passes through the upper middle frame disassembly hole one (19) and the upper middle frame disassembly hole two (20). At the same time, twist the bolt three (4) into the bottom plate disassembly hole one (27) and the bottom plate disassembly hole two (28) respectively. As the knob is turned, the bolt three (4) passes through the lower middle frame disassembly hole one (23) and the lower middle frame disassembly hole two (24). Through the contact and compression of the bolt three (4) with the surfaces of the upper middle frame (6) and the lower middle frame (7) respectively, the upper middle frame (6) and the lower middle frame (7) are separated to obtain the intelligent sensing composite material.

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