Resin-based composite material preparing and forming device

Abstract

The invention relates to the technical field of resin-based composite material forming, and discloses a resin-based composite material preparing and forming device which comprises a resin pretreatment mechanism used for conducting homogenizing and defoaming treatment on a resin matrix and conveying the treated resin matrix to a fiber pretreatment mechanism and a pressure control forming mechanism; the fiber pretreatment mechanisms are used for carrying out pre-impregnation treatment on fibers and reducing the porosity of fiber pre-impregnated pieces through ultrasonic assistance, the number of the fiber pretreatment mechanisms is two, and discharging ports of the two fiber pretreatment mechanisms surround the cutting and stacking mechanism to form an included angle of 90 degrees; a height difference exists between the two sets of discharge ports, and a rolling device is arranged at the discharge port of each set of fiber pretreatment mechanism. Through a three-stage ultrasonic dispersion technology, gradient power and temperature control are adopted, and magnetic stirring is combined, so that full-size uniform distribution of the carbon nanofiber / montmorillonite filler from micron scale to nano scale is realized.

Description

Technical Field

[0001] This invention relates to the field of resin-based composite material molding technology, specifically to a resin-based composite material preparation and molding apparatus. Background Technology

[0002] Resin-based composite materials are widely used in aerospace, new energy vehicles and other fields, but their performance bottlenecks have long been problems such as low interfacial bonding strength, high porosity and low molding efficiency.

[0003] In existing technologies, resin dispersion processes often employ single-stage ultrasonic treatment, making it difficult to achieve uniform distribution of nanofillers across the entire size range. In fiber preimpregnation processes, traditional impregnation techniques result in excessive porosity due to residual air bubbles, and the interlayer bonding strength of the fibers is insufficient. Furthermore, mold degassing technologies often rely on single vacuum or pressure control, which is insufficient to cover the elimination requirements of air bubbles ranging from millimeters to nanometers. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a resin-based composite material preparation and molding apparatus, which solves the problems of low interfacial bonding strength and high porosity in existing resin-based composite materials.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a resin-based composite material preparation and molding apparatus, comprising: The resin pretreatment unit is used to perform homogenization and degassing treatment on the resin matrix, and then conveys the treated resin matrix to the fiber pretreatment unit and the compression molding unit respectively. The fiber pretreatment mechanism is used to pre-impregnate the fibers and reduce the porosity of the fiber prepreg with the assistance of ultrasound. The number of fiber pretreatment mechanisms is set to two sets, and the outlets of the two sets of fiber pretreatment mechanisms are at a 90° angle to the cutting and stacking mechanism, and there is a height difference between the outlets of the two sets. Each set of fiber pretreatment mechanisms is equipped with a roller pressing device at its outlet. The fiber prepreg moves toward the cutting and stacking mechanism under the drive of the clamping device. At the same time, the roller pressing device forms a honeycomb protrusion structure on the upper and lower surfaces of the fiber prepreg. The spacing or size of the honeycomb protrusion structure output by the two sets of roller pressing devices is different. When the fiber prepreg output by the two sets of roller pressing devices are stacked, the honeycomb protrusion structures of the two are arranged in an alternating or nested arrangement. The cutting and stacking mechanism is used to cut the fiber prepregs output from the two fiber pretreatment mechanisms and stack them together. The pressure-controlled molding mechanism performs pressure-controlled molding on fiber prepregs stacked in a preset quantity.

[0006] Preferably, the resin pretreatment mechanism includes a mixing tank with a magnetic stirring structure. The mixing tank has three discharge ends and two feed ends. The two discharge ends are connected to the fiber pretreatment mechanism and the pressure molding mechanism, respectively. One feed end is the resin raw material feeding port. The other discharge end and the feed end form a closed loop with the ultrasonic disperser through a circulating pump. The resin raw material is pumped from the mixing tank into the reaction vessel inside the disperser for multi-stage processing and then returned to the mixing tank to complete the mixing.

[0007] Preferably, the fiber pretreatment mechanism includes a pre-impregnation tank, in which multiple zigzag rollers of varying heights are arranged. Fibers are output from a reel into the pre-impregnation tank, pass through the multiple zigzag rollers in sequence to form a serpentine path, and are output by a roller pressing device. A feed pipe is provided at the opening of the pre-impregnation tank, and the feed pipe is connected to one discharge end of a mixing tank. An ultrasonic vibration component is embedded in the wall of the pre-impregnation tank.

[0008] Preferably, the roller pressing device includes an upper pressure roller and a lower pressure roller symmetrically distributed vertically, which are rotatably connected within a U-shaped frame one and a U-shaped frame two, respectively. The two sides of the U-shaped frame one are respectively slidably connected to the two side walls of a support frame, and a spring is also provided between the U-shaped frame one and the support frame. The spring force causes the upper pressure roller to press against the lower pressure roller. The outer wall of the U-shaped frame two is fixedly connected to the inner side of the support frame. Both the surfaces of the upper and lower pressure rollers have honeycomb cut surfaces. The outer wall of the support frame is fixedly connected to the outlet of the pre-impregnation tank. Motors are fixedly connected to both side walls. The output end of the motor is fixedly connected to one end of the shaft of the lower pressure roller. Gear 1 is fixedly connected to the other end of the shaft of the lower pressure roller. Gear 2 is fixedly connected to the shaft end of the upper pressure roller. When the fiber prepreg passes between the upper and lower pressure rollers, the upper and lower pressure rollers press the upper and lower surfaces of the fiber prepreg respectively, forming a honeycomb protrusion structure on the upper and lower surfaces of the fiber prepreg through the honeycomb cut. At the same time, gear 1 and gear 2 mesh, and the upper and lower pressure rollers rotate synchronously in opposite directions, driving the fiber prepreg to move out.

[0009] Preferably, the cutting and stacking mechanism includes two material racks, each fixedly connected to the outer wall of two support frames on one side, so that the two material racks are arranged horizontally at a 90° angle and a height difference is formed between them. A guide plate is provided above the side of the material racks closest to the support frames, forming a material channel between the material racks and the guide plate. A cutting device is provided above the side of the guide plate furthest from the support frames. A stacking box is provided below the two material racks, and a pressing block is provided above it. A pressing device is fixedly connected above the pressing block. A guide slope is provided around the bottom wall of the pressing block. When the cutting device cuts the fiber prepreg, the pressing device drives the pressing block to move down, pressing the upper and lower fiber prepregs into the stacking box simultaneously.

[0010] Preferably, auxiliary limiting devices are respectively provided on the two crossbeams on the other side of the material rack. The auxiliary limiting device includes an upper limiting plate and a lower limiting plate, with a gap between them corresponding to the material channel. The lower limiting plate is slidably connected to the crossbeam, and a second spring is provided between them. The upper part of the upper limiting plate has a second guide slope that matches the first guide slope. When the pressing block is pressed down, the first guide slope and the second guide slope are squeezed together, pushing the lower limiting plate into the crossbeam of the material rack. At this time, the side of the fiber prepreg is disengaged from the auxiliary limiting device.

[0011] Preferably, the clamping device includes a bridging plate, on the upper wall of which is provided an electric clamp. The two ends of the bridging plate are slidably connected to the lower part of two crossbeams of the material rack. At the same time, a sliding rod is slidably connected inside the two crossbeams of the material rack. One end of the sliding rod is fixedly connected to the end side wall of the bridging plate, and the other end is rotatably connected to the output end of the electric push rod. The outer cylinder end of the electric push rod is rotatably connected to the outer wall of the prepreg tank. When the fiber prepreg extends from the material channel, the electric clamp clamps the fiber prepreg, and the electric push rod extends to push the bridging plate to move through the sliding rod, so that the electric clamp pulls out the fiber prepreg.

[0012] Preferably, the pressure-controlled forming mechanism includes an upper punch and a lower die, which are symmetrically distributed within the guide frame. The upper punch is fitted and fixedly connected to the guide rods of the guide frame at all four corners, and the lower die is fitted and slidably connected to the guide rods of the guide frame at all four corners. The upper punch includes an outer mold body and an inner mold body. The lower part of the inner mold body is embedded and slidably connected to the outer mold body, and the upper part of the inner mold body penetrates through the top wall of the outer mold body and is fixedly connected to the output end of the hydraulic press. The bottom wall of the lower die is fixedly connected to the output end of the cylinder, and the outer bottom wall of the cylinder is fixedly connected to the bottom wall of the guide frame. When the outer mold body and the lower die are fitted together, a sealed inner cavity is formed between them. The outer mold body is also connected in sequence to a vacuum pump and a nitrogen injection device. Microwave generators are arranged in a ring array in the mold walls around the lower die, and ultrasonic vibration components are arranged in the bottom mold wall of the lower die.

[0013] This invention provides a resin-based composite material preparation and molding apparatus. It has the following beneficial effects: 1. This invention utilizes a three-stage ultrasonic dispersion technology, employing gradient power and temperature control combined with magnetic stirring, to achieve uniform distribution of carbon nanofiber / montmorillonite fillers across the entire size spectrum from micrometers to nanometers. Simultaneously, the mixing tank and ultrasonic disperser are connected via a closed-loop pipeline, supporting flexible adaptation to volumes from 50 to 3000L, thus avoiding metal fatigue caused by prolonged ultrasonic radiation.

[0014] 2. This invention utilizes microwave and ultrasonic frequency matching to macroscopically heat and reduce resin viscosity to below 300 Pa·s. Simultaneously, the cavitation effect promotes resin penetration, and combined with a vacuum pressure degassing process, the porosity is reduced to below 0.3%. Furthermore, the roller pressing device forms physical anchoring points through staggered honeycomb cross-sections (with varying spacing / size), and, in conjunction with the reversible lamination of adjacent fiber prepreg layers, significantly enhances interlayer shear strength and interfacial bonding. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the fiber pretreatment mechanism in this invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the internal structure of the prepreg tank in this invention; Figure 4 This is a side view of the roller pressing device of the present invention; Figure 5 This is a schematic diagram of the clamping device in this invention; Figure 6 This is a schematic diagram of the auxiliary limiting device in this invention; Figure 7 This is a schematic diagram of the front structure of the clamping device in this invention; Figure 8 This is a front view schematic diagram of the pressure-controlled molding mechanism in this invention; Figure 9 This is a schematic diagram of the pressure-controlled molding mechanism in this invention.

[0016] The components include: 1. Fiber pretreatment mechanism; 101. Pre-impregnation tank; 102. Deflecting roller; 2. Cutting and stacking mechanism; 201. Material rack; 202. Guide plate; 203. Cutting device; 204. Stacking box; 205. Lower pressure block; 206. Lower pressure device; 207. Upper limit plate; 208. Lower limit plate; 209. Spring II; 210. Cross-connecting plate; 211. Electric clamp; 212. Slide rod; 213. Electric push rod; 3. Roller pressing device; 301. Upper pressure roller; 302. Lower pressure roller; 303. U-shaped frame I; 304. U-shaped frame II; 305. Support frame; 306. Spring I; 307. Motor; 308. Gear I; 309. Gear II; 4. Upper punch; 401. Outer mold body; 402. Inner mold body; 5. Lower die; 6. Guide frame; 7. Cylinder. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see the appendix Figure 1 -Appendix Figure 9 This invention provides a resin-based composite material preparation and molding apparatus, comprising: The resin pretreatment unit is used to perform homogenization and degassing treatment on the resin matrix, and then conveys the treated resin matrix to the fiber pretreatment unit 1 and the compression molding unit respectively. The resin pretreatment mechanism includes a mixing tank with a magnetic stirring structure. The mixing tank has three discharge ends and two feed ends. The two discharge ends are connected to the fiber pretreatment mechanism 1 and the pressure molding mechanism, respectively. One feed end is the resin raw material feeding port. The other discharge end and the feed end form a closed loop with the ultrasonic disperser through a circulating pump. The resin raw material is pumped from the mixing tank into the reaction vessel inside the disperser for multi-stage processing and then returned to the mixing tank to complete the mixing.

[0019] The resin raw material is mainly composed of fluorinated glycidyl ester type epoxy resin (DGEBHFA) (accounting for 60-70%), and mixed with low viscosity glycidyl ether (such as 692 diluent) and carbon nanofiber / montmorillonite composite nanofiller (1-2wt.%).

[0020] Multi-stage ultrasound treatment specifically includes: First-stage ultrasonic dispersion (coarse dispersion) With a power of 60-80 kW, a temperature of 30-35℃, and a time of 30 minutes, the agglomerates of nanofillers are initially broken up through the high-intensity cavitation effect.

[0021] Second-stage ultrasonic dispersion (fine dispersion) Power 80-100 kW, temperature 35-40℃, time 60 minutes, combined with magnetic stirring (speed 300-500 rpm) to achieve uniform distribution of packing.

[0022] Third-stage ultrasonic dispersion (stabilization) The dispersion system was stabilized by gradient cooling (cooling rate 5℃ / min) at a power of 100-120 kW, a temperature of 40-45℃, and a time of 30 minutes.

[0023] The three-stage ultrasonic process, combined with gradient power and temperature control, breaks through the limitations of traditional single-stage dispersion and achieves uniform distribution of nanofillers across the entire size range (micrometer to nanometer scale).

[0024] Secondly, the separate design of the mixing tank and the ultrasonic disperser can be flexibly matched with mixing tanks of different volumes (50L-3000L), while avoiding metal fatigue of the tank caused by long-term ultrasonic radiation.

[0025] Fiber pretreatment mechanism 1 is used to pre-impregnate fibers and reduce the porosity of fiber prepregs with ultrasonic assistance. Two sets of fiber pretreatment mechanisms 1 are set. The outlets of the two sets of fiber pretreatment mechanisms 1 are at a 90° angle to the cutting and stacking mechanism 2, and there is a height difference between the outlets of the two sets. Each set of fiber pretreatment mechanisms 1 is equipped with a roller pressing device 3 at its outlet. The fiber prepregs move toward the cutting and stacking mechanism 2 under the drive of the clamping device. At the same time, the roller pressing device 3 forms a honeycomb protrusion structure on the upper and lower surfaces of the fiber prepregs. The spacing or size of the honeycomb protrusion structures output by the two sets of roller pressing devices 3 are different. When the fiber prepregs output by the two sets of roller pressing devices 3 are stacked, the honeycomb protrusion structures of the two are arranged in an alternating or nested arrangement. The fiber pretreatment mechanism 1 includes a pre-impregnation tank 101, which contains multiple staggered deflecting rollers 102. Fibers are fed into the pre-impregnation tank 101 from a reel, pass through the deflecting rollers 102 sequentially to form a serpentine path, and are then output by a roller pressing device 3. A feed pipe is located at the opening of the pre-impregnation tank 101, and the feed pipe is connected to one discharge end of a mixing tank. An ultrasonic vibration component is embedded in the wall of the pre-impregnation tank 101. It should be noted that the pre-impregnation tank 101 has a heating function; microwave heating is a suitable solution.

[0026] Microwaves are responsible for macroscopic heating to reduce resin viscosity (viscosity drops to below 300 Pa·s), while ultrasonic cavitation effect (local pressure reaches 10^4 atm) promotes resin penetration into fiber bundles, and porosity can be reduced to below 0.3%.

[0027] The roller pressing device 3 includes an upper pressure roller 301 and a lower pressure roller 302 symmetrically distributed vertically. They are rotatably connected within a first U-shaped frame 303 and a second U-shaped frame 304, respectively. The first U-shaped frame 303 is slidably connected to the two side walls of a support frame 305 on both sides. A spring 306 is also provided between the first U-shaped frame 303 and the support frame 305. The spring 306 forces the upper pressure roller 301 towards the lower pressure roller 302. The outer wall of the second U-shaped frame 304 is fixedly connected to the inner side of the support frame 305. Both the surface of the upper pressure roller 301 and the surface of the lower pressure roller 302 have honeycomb cut surfaces. The outer wall of the support frame 305 is fixedly connected to the outlet of the pre-impregnation tank 101. A motor 307 is fixedly connected to the side wall of roller 304. The output end of the motor 307 is fixedly connected to one end of the shaft of the lower roller 302. A gear 308 is fixedly connected to the other end of the shaft of the lower roller 302. A gear 309 is fixedly connected to the shaft of the upper roller 301. When the fiber prepreg passes between the upper roller 301 and the lower roller 302, the upper roller 301 and the lower roller 302 press the upper and lower surfaces of the fiber prepreg respectively, forming a honeycomb protrusion structure on the upper and lower surfaces of the fiber prepreg through the honeycomb cut. At the same time, the gear 308 meshes with the gear 309, and the upper roller 301 and the lower roller 302 rotate synchronously in opposite directions, driving the fiber prepreg to move out.

[0028] The roller pressing device 3 forms a honeycomb protrusion structure on the surface of the fiber prepreg, which specifically serves as the physical anchoring point between the fiber prepreg and the resin. This structure significantly improves the interfacial bonding strength between the fiber prepreg and the resin.

[0029] Meanwhile, when the fiber prepregs output from the two sets of roller pressing devices 3 are stacked, their honeycomb protrusion structures are arranged in an alternating or nested manner. That is, between two adjacent layers of fiber prepregs, the honeycomb protrusion structures are interlocked or nested, further improving the interfacial bonding strength between the fiber prepregs (experiments showed an improvement of 35-42%). The cutting and stacking mechanism 2 is used to cut the fiber prepregs output from the two fiber pretreatment mechanisms 1 and stack them together. The cutting and stacking mechanism 2 includes two material racks 201. One side of each material rack 201 is fixedly connected to the outer wall of two support frames 305, so that the two material racks 201 are arranged horizontally at a 90° angle and a height difference is formed between them. A guide plate 202 is provided above the side of the material rack 201 closest to the support frame 305, so that a material channel is formed between the material rack 201 and the guide plate 202. A cutting device 203 is provided above the side of the guide plate 202 away from the support frame 305. A stacking box 204 is provided below the two material racks 201, and a pressing block 205 is provided above it. A pressing device 206 is fixedly connected above the pressing block 205. A guide slope is provided around the bottom wall of the pressing block 205. When the cutting device 203 cuts the fiber prepreg, the pressing device 206 drives the pressing block 205 to move down, pressing the upper and lower fiber prepregs into the stacking box 204 at the same time.

[0030] Auxiliary limiting devices are respectively installed on the two crossbeams on the other side of the material rack 201. The auxiliary limiting devices include an upper limiting plate 207 and a lower limiting plate 208, with a gap between them corresponding to the material channel. The lower limiting plate 208 is slidably connected to the crossbeam, and a spring 209 is installed between them. The upper part of the upper limiting plate 207 has a guide slope 2 that matches the guide slope 1. When the pressing block 205 presses down, the guide slope 1 and the guide slope 2 are squeezed together, pushing the lower limiting plate 208 into the crossbeam of the material rack 201. At this time, the side of the fiber prepreg is disengaged from the auxiliary limiting device. This allows the pressing block 205 to press down and drive the fiber prepreg into the stacking box 204 for stacking.

[0031] The clamping device includes a bridging plate 210, with an electric clamp 211 mounted on the upper wall of the bridging plate 210. The two ends of the bridging plate 210 are slidably connected to the lower part of the two crossbeams of the material rack 201. At the same time, a slide rod 212 is slidably connected inside the two crossbeams of the material rack 201. One end of the slide rod 212 is fixedly connected to the end side wall of the bridging plate 210, and the other end is rotatably connected to the output end of the electric push rod 213. The outer end of the electric push rod 213 is rotatably connected to the outer wall of the prepreg tank 101. When the fiber prepreg extends out of the material channel, the electric clamp 211 clamps the fiber prepreg, and the electric push rod 213 extends and pushes the bridging plate 210 to move through the slide rod 212, so that the electric clamp 211 pulls out the fiber prepreg.

[0032] By arranging the two material racks 201 horizontally at a 90° angle, the fiber bundles of the two adjacent fiber prepreg layers are perpendicular to each other. By pressing the multi-layer fiber prepreg together in this way, the formed product has multi-directional tensile strength.

[0033] The pressure-controlled molding mechanism performs pressure-controlled molding on fiber prepregs stacked in a preset quantity.

[0034] The pressure-controlled forming mechanism includes an upper punch 4 and a lower die 5, which are symmetrically distributed within a guide frame 6. The four corners of the upper punch 4 are fitted and fixedly connected to the guide rods of the guide frame 6, and the four corners of the lower die 5 are fitted and slidably connected to the guide rods of the guide frame 6. The upper punch 4 includes an outer mold body 401 and an inner mold body 402. The lower part of the inner mold body 402 is embedded and slidably connected within the outer mold body 401, and the upper part of the inner mold body 402 penetrates the top wall of the outer mold body 401 and is fixedly connected to the output end of the hydraulic press. The bottom wall of the lower die 5 is fixedly connected to the output end of the cylinder 7, and the outer bottom wall of the cylinder 7 is fixedly connected to the bottom wall of the guide frame 6. When the outer mold body 401 and the lower die 5 are fitted together, a sealed inner cavity is formed between them. The outer mold body 401 is also connected in sequence to a vacuum pump and a nitrogen injection device. Microwave generators are installed in the mold walls around the lower die 5 to form a ring array, and ultrasonic vibration components are installed in the bottom mold wall of the lower die 5.

[0035] First, a predetermined number of stacked fiber prepregs are placed into the lower mold 402, and resin is injected by the resin pretreatment mechanism 10. The cylinder 7 then pushes the lower mold 5 to engage with the outer mold body 401, forming a sealed space. Next, a ring array microwave generator is activated to heat the interior of the space. Then, a multi-stage vacuum pressure degassing process is employed. Coarse degassing: vacuum degree ≤10 kPa, ultrasonic power 300 W to break millimeter-sized bubbles; Micropore elimination: A vacuum of 50-80 kPa is superimposed with an ultrasonic power of 500 W to guide the migration of submillimeter-sized bubbles through the acoustic flow effect; Nitrogen reverse osmosis: Inject 0.8-1.2 MPa of nitrogen gas, utilizing its low solubility (1 / 10 of CO2) to suppress bubble coalescence and fill nanoscale pores.

[0036] Finally, the hydraulic press drives the inner mold 402 to press down, realizing the integrated molding and compaction of the multi-layer fiber prepreg.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resin-based composite material preparation and molding apparatus, characterized in that, include: The resin pretreatment mechanism is used to perform homogenization and degassing treatment on the resin matrix and to transport the treated resin matrix to the fiber pretreatment mechanism (1) and the compression molding mechanism respectively. Fiber pretreatment mechanism (1) is used to pre-impregnate the fiber and reduce the porosity of the fiber prepreg by ultrasonic assistance. The number of fiber pretreatment mechanisms (1) is set to two sets. The outlets of the two sets of fiber pretreatment mechanisms (1) are at a 90° angle around the cutting and stacking mechanism (2), and there is a height difference between the outlets of the two sets. Each set of fiber pretreatment mechanisms (1) is equipped with a roller pressing device (3) at its outlet. The fiber prepreg moves toward the cutting and stacking mechanism (2) under the drive of the clamping device. At the same time, the upper and lower surfaces of the fiber prepreg are formed into a honeycomb protrusion structure by the roller pressing device (3). The spacing or size of the honeycomb protrusion structure output by the two sets of roller pressing devices (3) is different. When the fiber prepreg output by the two sets of roller pressing devices (3) are stacked, the honeycomb protrusion structures of the two are arranged in an alternating or nested arrangement. The cutting and stacking mechanism (2) is used to cut the fiber prepregs output from the two fiber pretreatment mechanisms (1) and stack them together. The pressure-controlled molding mechanism performs pressure-controlled molding on fiber prepregs stacked in a preset quantity.

2. The resin-based composite material preparation and molding apparatus according to claim 1, characterized in that, The resin pretreatment mechanism includes a mixing tank, which adopts a magnetic stirring structure and is equipped with three discharge ends and two feed ends. The two discharge ends are connected to the fiber pretreatment mechanism (1) and the pressure-controlled molding mechanism, respectively. One feed end is the resin raw material feeding port, and the other discharge end and feed end form a closed loop with the ultrasonic disperser through a circulating pump. The resin raw material is pumped from the mixing tank into the reaction vessel in the disperser for multi-stage processing and then returned to the mixing tank to complete the mixing.

3. The resin-based composite material preparation and molding apparatus according to claim 2, characterized in that, The fiber pretreatment mechanism (1) includes a pre-impregnation tank (101), in which multiple folding rollers (102) are arranged in a staggered pattern. Fibers are output from a reel into the pre-impregnation tank (101), pass through the multiple folding rollers (102) in sequence to form a serpentine path, and are output by a roller pressing device (3). A feed pipe is provided at the opening of the pre-impregnation tank (101), and the feed pipe is connected to one discharge end of a mixing tank. An ultrasonic vibration component is embedded in the tank wall of the pre-impregnation tank (101).

4. The resin-based composite material preparation and molding apparatus according to claim 3, characterized in that, The roller pressing device (3) includes an upper pressure roller (301) and a lower pressure roller (302) symmetrically distributed vertically. The two rollers are rotatably connected to a first U-shaped frame (303) and a second U-shaped frame (304), respectively. The first U-shaped frame (303) is slidably connected to the two side walls of the support frame (305) on both sides. A spring (306) is also provided between the first U-shaped frame (303) and the support frame (305). The spring force of the first spring (306) causes the upper pressure roller (301) to press against the lower pressure roller (302). The outer wall of the second U-shaped frame (304) is fixedly connected to the inner side of the support frame (305). The surfaces of the upper pressure roller (301) and the lower pressure roller (302) are both provided with honeycomb cut surfaces. The outer wall of the support frame (305) is fixedly connected to the outlet of the prepreg tank (101). A motor (307) is fixedly connected to the side wall of the second U-shaped frame (304). The output end of the motor (307) is fixedly connected to one end of the shaft of the lower pressure roller (302). A gear (308) is fixedly connected to the other end of the shaft of the lower pressure roller (302). A gear (309) is fixedly connected to the shaft end of the upper pressure roller (301). When the fiber prepreg passes between the upper pressure roller (301) and the lower pressure roller (302), the upper pressure roller (301) and the lower pressure roller (302) press the upper and lower surfaces of the fiber prepreg respectively. A honeycomb protrusion structure is formed on the upper and lower surfaces of the fiber prepreg through the honeycomb cut surface. At the same time, the gear (308) and the gear (309) mesh, and the upper pressure roller (301) and the lower pressure roller (302) rotate synchronously in opposite directions, driving the fiber prepreg to move out.

5. The resin-based composite material preparation and molding apparatus according to claim 4, characterized in that, The cutting and stacking mechanism (2) includes two material racks (201). One side of each material rack (201) is fixedly connected to the outer wall of two support frames (305), so that the two material racks (201) are arranged horizontally at a 90° angle and a height difference is formed between them. A guide plate (202) is provided above the side of the material rack (201) closest to the support frame (305), so that a material channel is formed between the material rack (201) and the guide plate (202). The guide plate (202) is away from the support frame (305). 05) A cutting device (203) is provided on one side above, and a stacking box (204) is provided below the two material racks (201). A pressing block (205) is provided above the pressing block (205). A pressing device (206) is fixedly connected above the pressing block (205). A guide slope is provided around the bottom wall of the pressing block (205). When the cutting device (203) cuts the fiber prepreg, the pressing device (206) drives the pressing block (205) to move down, pressing the upper and lower fiber prepregs into the stacking box (204) at the same time.

6. The resin-based composite material preparation and molding apparatus according to claim 5, characterized in that, Auxiliary limiting devices are respectively provided on the two crossbeams on the other side of the material rack (201). The auxiliary limiting devices include an upper limiting plate (207) and a lower limiting plate (208). There is a gap between the two corresponding to the material channel. The lower limiting plate (208) is slidably connected to the crossbeam, and a spring (209) is provided between the two. The upper part of the upper limiting plate (207) is provided with a guide slope two that matches the guide slope one. When the pressing block (205) is pressed down, the guide slope one and the guide slope two are squeezed together, pushing the lower limiting plate (208) to embed into the crossbeam of the material rack (201). At this time, the side of the fiber prepreg is separated from the auxiliary limiting device.

7. The resin-based composite material preparation and molding apparatus according to claim 6, characterized in that, The clamping device includes a cross-connecting plate (210), and an electric clamp (211) is provided on the upper wall of the cross-connecting plate (210). The two ends of the cross-connecting plate (210) are slidably connected to the lower part of the two crossbeams of the material rack (201). At the same time, a slide rod (212) is slidably connected inside the two crossbeams of the material rack (201). One end of the slide rod (212) is fixedly connected to the end side wall of the cross-connecting plate (210), and the other end is rotatably connected to the output end of the electric push rod (213). The outer cylinder end of the electric push rod (213) is rotatably connected to the outer wall of the prepreg tank (101). When the fiber prepreg extends out from the material channel, the electric clamp (211) clamps the fiber prepreg, and the electric push rod (213) extends and pushes the cross-connecting plate (210) to move through the slide rod (212), so that the electric clamp (211) pulls out the fiber prepreg.

8. The resin-based composite material preparation and molding apparatus according to claim 1, characterized in that, The pressure-controlled forming mechanism includes an upper punch (4) and a lower die (5), which are symmetrically distributed within a guide frame (6). The upper punch (4) is fitted and fixedly connected to the guide rods of the guide frame (6) at all four corners, and the lower die (5) is fitted and slidably connected to the guide rods of the guide frame (6) at all four corners. The upper punch (4) includes an outer mold body (401) and an inner mold body (402). The lower part of the inner mold body (402) is embedded and slidably connected within the outer mold body (401), and the upper part of the inner mold body (402) penetrates through the outer mold body (401). The top wall of the lower mold (5) is fixedly connected to the output end of the hydraulic press. The bottom wall of the lower mold (5) is fixedly connected to the output end of the cylinder (7). The outer bottom wall of the cylinder (7) is fixedly connected to the bottom wall of the guide frame (6). When the outer mold body (401) and the lower mold (5) are fitted together, a sealed inner cavity is formed between them. The outer mold body (401) is also connected to the vacuum pump and the nitrogen injection equipment in sequence. Microwave generators are provided in the mold walls around the lower mold (5) to form a ring array. Ultrasonic vibration components are provided in the bottom mold wall of the lower mold (5).

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