An impregnation device for processing carbon fiber mat

Abstract

The application discloses a kind of impregnation devices for carbon fiber felt processing, it is related to carbon fiber felt processing technical field, including impregnation box, delimitation impregnation space and felt feed path, the breathing type extrusion mechanism is located in the dry state pre-pressing cavity upstream of impregnation space, including extrusion plate and driving part;The driving part drives extrusion plate to pre-pressing exhaust of dry felt, and extrusion again after liquid absorption is completed to discharge excess impregnation liquid;The pressure self-regulating mechanism is located upstream of breathing type extrusion mechanism, including thickness perception piece and adjusting assembly;The thickness perception piece obtains real-time thickness of felt, and the adjusting assembly dynamically adjusts the downstroke of driving part according to thickness signal, so that the felt of different thicknesses keeps constant compression ratio;The tension adjusting mechanism is located at both sides of impregnation box, including two tension rollers, for breathing type extrusion mechanism when impregnating felt, two tension rollers synchronous position change occurs, so that felt keeps tight degree.

Description

Technical Field

[0001] This invention relates to the field of carbon fiber felt technology, and in particular to an impregnation apparatus for processing carbon fiber felt. Background Technology

[0002] Carbon fiber felt, due to its excellent high-temperature resistance, low thermal conductivity, and good chemical stability, is widely used in high-end fields such as heat preservation zones in photovoltaic single-crystal furnaces, semiconductor crystal growth, gas diffusion layers in hydrogen fuel cells, and carbon / carbon composite materials in aerospace. To impart specific mechanical strength, structural rigidity, or functionality to carbon fiber felt, it typically undergoes impregnation treatment. This involves introducing and filling the internal pores of the felt with impregnation solutions such as resin, asphalt, or functional solutions, followed by high-temperature curing or carbonization.

[0003] Currently, commonly used impregnation processes in industry mainly include atmospheric pressure immersion, continuous immersion with extrusion rollers, and traditional static vacuum impregnation. However, carbon fiber felt has a high porosity and contains a complex multi-level pore network composed of macropores between fiber bundles and micropores between monofilaments. In actual production, existing impregnation equipment and processes have insurmountable technical defects in terms of "penetration" and "defoaming," specifically manifested in the following two intertwined aspects: Firstly, in existing conventional impregnation processes, the impregnation solution often relies solely on natural capillary action or simple gravity / negative pressure to penetrate the surface of the felt or the large pores between fiber bundles. Because the impregnation solution struggles to spontaneously wet the fiber surface and penetrate the tiny pores between monofilaments, unimpregnated "dry cores" or "white spots" easily appear inside the felt. This uneven penetration not only reduces the overall density of the felt but also leads to severe performance gradients within the final cured or carbonized composite material, significantly weakening its mechanical strength and thermal uniformity.

[0004] Secondly, during the impregnation process, the complex pore network inside the felt is filled with air. When the impregnation liquid enters the felt, if the air cannot escape smoothly, it will be trapped in the liquid. Especially in the traditional top-down impregnation method, the downward flow of the liquid is opposite to the upward buoyancy of the air bubbles, and the "head-on collision" between the two can easily create an "airlock" effect inside the felt. At the same time, the felt contains a large number of "blind pores" or "closed pores". When the external liquid rushes into the large pores, the air deep in the micropores is instantly sealed off. These residual microbubbles will expand or rupture due to heat during the subsequent high-temperature curing or carbonization stage, leaving a large number of micropores and microcracks in the carbon matrix. This not only seriously damages the structural integrity of the carbon fiber felt, but also leads to a significant decrease in its ablation resistance, compressive strength, and service life. In conclusion, due to the inherent characteristics of carbon fiber felt, the impregnation effect cannot be guaranteed during the impregnation process. Summary of the Invention

[0005] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. An embodiment of the present invention provides an impregnation device for processing carbon fiber felt, thereby solving the problem of poor impregnation effect during the impregnation process of existing carbon fiber felt.

[0006] The present invention adopts the following technical solution: an impregnation device for processing carbon fiber felt, including an impregnation tank that defines the impregnation space and the felt feeding path, and further including: a breathing extrusion mechanism, a pressure self-regulating mechanism and a tension regulating mechanism; The breathing extrusion mechanism is located in the dry pre-compression chamber upstream of the impregnation space, and includes an extrusion plate and a driving component; the driving component drives the extrusion plate to pre-compress and vent the dry felt, and extrudes it again after the liquid absorption is completed to discharge excess impregnation liquid; The pressure self-regulating mechanism is located upstream of the breathing compression mechanism and includes a thickness sensing element and an adjustment component. The thickness sensing element acquires the real-time thickness of the felt, and the adjustment component dynamically adjusts the downward stroke of the drive component according to the thickness signal so that felts of different thicknesses maintain a constant compression ratio. The tension adjustment mechanism is located on both sides of the impregnation tank and includes two tension rollers. When the breathing extrusion mechanism impregnates the felt, the two tension rollers change position synchronously to keep the felt taut.

[0007] Furthermore, the tension adjustment mechanism includes a left adjustment component and a right adjustment component, which are respectively located on both sides of the impregnation tank. A tension roller is rotatably mounted on the movable plate. The movable plate moves up and down via a drive component. The right adjustment component includes a tension roller mounted on its mating frame. The tension roller moves via an electrically controlled lifter, which drives a mating pressing block to move. The mating pressing block is connected to the tension roller.

[0008] Furthermore, the guide limiting mechanism includes a guide rod, a mounting groove is provided in the guide rod, a spring plate is provided in the mounting groove, an upper baffle is provided on one side of the spring plate, a lower deflection block is provided below the upper baffle, and the upper baffle and the lower deflection block are connected by a spring.

[0009] Furthermore, the breathing extrusion mechanism includes a mating box and an upper extrusion plate. The bottom surface of the mating box has several through holes. A mating guide block is provided between the mating box and the upper extrusion plate. A through groove is provided at the corresponding position on the upper extrusion plate. Passing grooves are provided on both sides of the mating box for the felt to move. A floating plate is provided above the passing groove. The floating plate is slidably connected to the mating guide block. An electromagnet is provided above the mating guide block. A baffle is provided above the upper extrusion plate. An extrusion hydraulic rod is provided between one of the baffles and the upper extrusion plate. The extrusion hydraulic rod is connected to the extruder through a conveying pipe. The moving section of the extruder is moved by the flow of a medium. The extruder is connected to the floating plate at the outlet of the mating box. A connecting plate is provided between the two guide rods. An electric extrusion rod is provided between the connecting plate and the upper extrusion plate.

[0010] Furthermore, the contact surfaces between the mating box and the upper baffle and lower deflection block are arc surfaces, with the arc of the lower deflection block being smaller than that of the upper baffle.

[0011] Furthermore, the inner diameter of the upper floating baffle barrel groove is the same as the outer diameter of the matching guide block.

[0012] Furthermore, the guide block and the electromagnet are magnetically coupled, and a pressure sensor is provided below the guide block. The pressure sensor is electrically connected to the electromagnet through a controller.

[0013] Furthermore, the pressure self-adjusting mechanism includes a detection box, a movable block is provided inside the detection box, and the detection box is connected to an adjustment box located outside the mating guide block through the movable block. A limiting block is provided inside the adjustment box to serve as the movable section.

[0014] Furthermore, the inner surface area of ​​the limiting block is smaller than the inner surface area of ​​the regulating box, and the upper end of the movable block is initially located at the bottom of the through groove. One side of the connecting pipe is located in the lower half of the limiting box, and the other side is located in the upper half of the detection box.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, by setting up a breathing-type extrusion mechanism, the impregnation effect of the felt is effectively improved. This invention breaks the conventional logic of "immersion in liquid first, then extrusion" in traditional impregnation, and adopts the sequence of "prioritizing dry extrusion to expel air, followed by negative pressure absorption and penetration". Before absorption, air in the pores of the felt is forcibly expelled by mechanical pre-pressure to eliminate air resistance (airlock effect) when the liquid enters the micropores and the "air spring" rebound effect generated by the compression of air. This allows the high-viscosity impregnation liquid to fill the tiny blind pores between the fiber bundles instantly and without dead angles, effectively improving the penetration rate. Secondly, by performing "pre-pressure degassing" followed by "bottom-up liquid suction," it is ensured that there is no residual air in the upward penetration channel of the liquid. This avoids the "head-on collision of gas and liquid two-phase flows" problem in traditional processes, where the liquid flows upward and the bubbles flow downward (or get trapped). The impregnating liquid moves smoothly from bottom to top like a piston, not only removing bubbles extremely thoroughly but also ensuring extremely uniform adhesive content in both the thickness and width directions of the felt, effectively avoiding internal micropores and surface skin buildup after curing. Finally, after the liquid absorption is completed, the breathing and squeezing mechanism is controlled to apply squeezing pressure to the felt again to discharge the excess impregnation liquid and effectively improve the uniformity of impregnation. This invention breaks away from the flawed design of traditional "fully immersed" synchronous extrusion adsorption in liquid, innovatively adopting a "dry on top, wet on bottom" gas-liquid separation dual-chamber structure. The "mechanical extrusion exhaust" action is performed in a dry, pre-pressurized exhaust chamber without liquid, allowing air within the pores to be directly discharged into the atmosphere, completely eliminating the "liquid resistance effect" of high-viscosity liquid on bubble escape. Simultaneously, it avoids the fluid eddies and shear forces generated by the reciprocating motion of the pressure plate in the liquid, fundamentally preventing the fatal defect of bubbles being broken up and "re-entered" deep into the micropores of the felt.

[0016] Secondly, by setting up a thickness detection and pressure self-adjustment mechanism, the thickness of the felt will change during the production process. If the breathing extrusion mechanism uses a fixed downward pressure, it is easy for locally thicker felt to be "over-extruded," thus crushing the three-dimensional needle-punched network and losing its original porosity, or for locally thinner felt to be "under-extruded," resulting in incomplete defoaming and uncontrolled glue content. To address this, the present invention sets up a thickness self-detection mechanism, which can obtain the actual thickness of the felt entering the impregnation area in real time and dynamically adjust the movement of the subsequent breathing extrusion mechanism, i.e., the downward pressure stroke (ensuring that the thicker the felt, the greater the absolute downward pressure stroke must be, and the thinner the felt, the smaller the absolute downward pressure stroke, i.e., different thicknesses, but the same compression ratio of the felt). This design breaks the limitations of traditional fixed-stroke extrusion, enabling the equipment to adaptively compensate according to the real-time thickness changes of the felt, ensuring that no matter how the felt thickness fluctuates, the actual compression ratio or extrusion pressure it bears remains constant within the optimal process window. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the tension adjustment mechanism of the present invention; Figure 3 This is a schematic diagram of the guide and limiting mechanism of the present invention; Figure 4 This is a schematic cross-sectional view of the guide rod structure of the present invention; Figure 5 This is a schematic diagram of the installation structure of the upper extrusion plate and the mating box of the present invention; Figure 6 This is a partial cross-sectional first-view structural schematic diagram of the mating box of the present invention; Figure 7 This is a partial cross-sectional view of the mating box of the present invention from a second perspective. Figure 8 This is a cross-sectional view of the mating box of the present invention from a third-angle perspective. Figure 9 For the present invention Figure 8 Enlarged structural diagram at point A in the middle; Figure 10 This is a schematic diagram of the pressure self-regulating mechanism of the present invention; Figure 11 This is a schematic diagram of the connection structure between the impregnation tank and the breathing extrusion mechanism of the present invention.

[0019] Figure label: 1. Tension adjustment mechanism; 11. Movable plate; 12. Drive assembly; 13. Tension roller; 14. Pressing block; 15. Electrically controlled lifting device; 2. Impregnation tank; 3. Guide limiting mechanism; 31. Spring plate; 32. Upper stop block; 33. Lower deflection stop block; 34. Guide rod; 4. Breathing extrusion mechanism; 41. Electrically controlled extrusion rod; 42. Connecting plate; 43. Upper extrusion plate; 44. Electromagnet; 45. Floating plate; 451. Downward pressure sensor; 46. Fitting box; 461. Through groove; 47. Fitting guide block; 48. Upper baffle; 49. Extrusion hydraulic rod; 410. Extruder; 5. Pressure self-regulating mechanism; 51. Movable block; 52. Detection box; 53. Electrically controlled telescopic rod; 54. Connecting pipe; 55. Limiting block; 56. Adjustment box. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0022] 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.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The following is combined with Figures 1 to 11 As shown, this embodiment of the invention provides an impregnation device for processing carbon fiber felt, including an impregnation tank 2 that defines the impregnation space and the felt feeding path. The device is characterized by further including: a breathing extrusion mechanism 4, a pressure self-regulating mechanism 5, and a tension regulating mechanism 1. The breathing extrusion mechanism 4 is located in the dry pre-compression chamber upstream of the impregnation space, and includes an extrusion plate and a driving component; the driving component drives the extrusion plate to pre-compress and vent the dry felt, and extrudes it again after the liquid absorption is completed to discharge excess impregnation liquid; The pressure self-regulating mechanism 5 is located upstream of the breathing compression mechanism 4 and includes a thickness sensing element and an adjustment component; the thickness sensing element obtains the real-time thickness of the felt, and the adjustment component dynamically adjusts the downward stroke of the drive component according to the thickness signal so that felts of different thicknesses maintain a constant compression ratio. The tension adjustment mechanism 1 is located on both sides of the impregnation tank 2 and includes two tension rollers 13. When the breathing extrusion mechanism 4 impregnates the felt, the two tension rollers 13 change position synchronously so that the felt remains taut.

[0026] During operation, when the extrusion plate of the breathing extrusion mechanism 4 presses down on the felt for "dry pre-compression" or "wet adhesive control," the tension of the felt on both sides of the extrusion point will surge instantaneously. At this time, the tension adjustment mechanism 1 senses the tension fluctuation in real time, and the drive assembly 12 and the electronically controlled lifter 15 move synchronously, causing the tension rollers 13 on both sides to produce adaptive clearance or compensation displacement, absorbing the excess tension generated during the extrusion, ensuring that the felt maintains a constant and appropriate tension in the "extrusion-release" breathing cycle, and preventing the felt from wrinkling, loosening, or breaking.

[0027] Specifically, the tension adjustment mechanism 1 includes a left adjustment component and a right adjustment component, which are respectively located on both sides of the impregnation tank 2. A tension roller 13 is rotatably mounted on the movable plate 11. The movable plate 11 moves up and down via a drive component 12. The right adjustment component includes a tension roller 13 mounted on its mating frame. The tension roller 13 moves via an electrically controlled lifter 15, which drives a mating pressing block 14 to move. The mating pressing block 14 is connected to the tension roller 13. A connecting plate 42 is provided between the two guide rods 34. An electric pressing rod is provided between the connecting plate 42 and the upper pressing plate 43.

[0028] During operation, the drive assembly 12 of the left adjustment component drives the floating plate 45 to make slight up-and-down adjustments to the tension roller 13, while the electrically controlled lifter 15 of the right adjustment component, in conjunction with the pressing block 14, drives the right tension roller 13 to move synchronously. The two form a dynamic tension balance network, providing bidirectional flexible tension buffering when the felt is fed and the pressing action occurs.

[0029] Specifically, the guide limiting mechanism 3 includes a guide rod 34, an installation groove is provided in the guide rod 34, a spring plate 31 is provided in the installation groove, an upper baffle 48 is provided on one side of the spring plate 31, a lower deflection block 33 is provided below the upper baffle 48, and the upper baffle 48 and the lower deflection block 33 are connected by a spring.

[0030] When the breathing-type extrusion mechanism 4 descends during operation, the upper extrusion plate 43 first extrudes and contacts the felt, and then drives the mating box 46 to move synchronously. When it rises, the upper extrusion plate 43 will move upward first under the action of the small deflection block. When it reaches the end, it will drive the mating box 46 to move upward as a whole, thus achieving the effect of first suction and then upward movement.

[0031] Specifically, the breathing extrusion mechanism 4 includes a mating box 46 and an upper extrusion plate 43. The bottom surface of the mating box 46 has several through holes. A mating guide block 47 is provided between the mating box 46 and the upper extrusion plate 43. A through groove is provided at the corresponding position of the upper extrusion plate 43. Passing grooves 461 are provided on both sides of the mating box 46 for the felt to move. A floating plate 45 is provided above the passing grooves 461. The floating plate 45 is slidably connected to the mating guide block 47. An electromagnet 44 is provided above the mating guide block 47. A baffle is provided above the upper extrusion plate 43. A hydraulic extrusion rod 49 is provided between one of the baffles and the upper extrusion plate 43. The hydraulic extrusion rod 49 is connected to the extruder 410 through a conveying pipe. The extruder 410 is moved by the flow of a medium. The extruder 410 is connected to the floating plate 45 at the outlet of the mating box 46.

[0032] During operation, the mechanism executes a "breathing" sequence: Step 1 (dry pre-compression and exhaust): After the felt enters the mating box 46, the movable end of the electrically controlled extrusion rod 41 extends, driving the upper extrusion plate 43 to press down, mechanically pre-compressing the dry felt, forcibly expelling the air in the pores to create a "microscopic vacuum" environment, and then driving the mating box 46 to move down as a whole. Step 2 (negative pressure liquid absorption): After the pre-pressing is completed, the electric control extrusion rod 41 moves upward, driving the upper extrusion plate 43 to move upward (at this time, the upper extrusion plate 43 and the mating box 46 form a tube-like structure). The impregnation liquid is smoothly drawn into the micropores of the felt from bottom to top through the through hole on the bottom surface of the mating box 46, achieving penetration without dead angles. Step 3 (Wet extrusion adhesive control): The electrically controlled extrusion rod 41 moves down a second time, causing the upper extrusion plate 43 to press down again, performing a second flexible extrusion on the wet felt to discharge excess impregnation liquid and ensure that the adhesive content is extremely uniform. At the same time, at the outlet, the height of the upper baffle 48 will be appropriately lowered, which can stabilize the extrusion of the felt during the output process.

[0033] Specifically, the contact surfaces of the mating box 46 with the upper baffle 48 and the lower deflection block 33 are arc surfaces, and the arc of the lower deflection block 33 is smaller than that of the upper baffle 48.

[0034] Specifically, the inner diameter of the upper floating baffle barrel groove is the same as the outer diameter of the matching guide block 47.

[0035] Specifically, the mating guide block 47 and the electromagnet 44 are magnetically mated, and a pressure sensor 451 is provided below the mating guide block 47. The pressure sensor 451 is electrically connected to the electromagnet 44 through a controller.

[0036] The pressure sensor 451 monitors the pressure depth of the guide block 47 in real time. When the set dry pre-compression critical position is reached, the signal is fed back to the controller. The controller precisely controls the solenoid 44 to cut off the power or maintain the pressure to prevent excessive pressure from damaging the felt fiber skeleton.

[0037] Specifically, the pressure self-adjusting mechanism includes a detection box 52, a movable block 51 is provided inside the detection box 52, and the detection box 52 is connected to an adjustment box 56 located outside the mating guide block 47 through the movable block 51. A limiting block 55 is provided inside the adjustment box 56 as a movable section.

[0038] Specifically, the inner surface area of ​​the limiting block 55 is smaller than the inner surface area of ​​the regulating box 56, and the upper end of the movable block 51 is initially located at the bottom of the through groove 461. One side of the connecting pipe 54 is located in the lower half of the limiting box, and the other side is located in the upper half of the detection box 52.

[0039] During operation, when the felt enters the passage trough 461, the floating plate moves downward under the action of the electromagnet 44 until the pressure sensor below senses the feedback pressure. At this time, the movable block 51 is pushed out under the action of the electrically controlled telescopic rod 53, and the movable block 51 is displaced in the detection box 52, squeezing the fluid medium (gas or liquid) in the detection box 52. This pressure change is transmitted to the regulating box 56 through the connecting pipe 54, pushing the limiting block 55 to displace, thereby dynamically changing the physical limit point (or sensor reference zero point) when the breathing squeezing mechanism 4 is pressed down. The core logic is as follows: the thicker the felt, the less the movable block 51 is lifted, and the limiting block 55 is adjusted accordingly, allowing for a smaller absolute stroke of the extrusion plate. Conversely, the thinner the felt, the higher the movable block 51 is lifted, and the corresponding downward stroke is reduced (at this point, the movable block 51 extends until it contacts the bottom surface of the floating plate 45; the extension length of the movable block 51 at this point is the felt thickness. Since the detection box 52 is smaller than the adjustment box 56, the limiting block 55 moves upward to a height less than the movable block 51, causing the lower surface of the upper extrusion plate 43 to be lower than the upper surface of the felt, thus achieving the extrusion effect). Therefore, at the mechanical and fluid linkage level, the adaptive adjustment of "changing the absolute stroke while maintaining the relative compression ratio" is automatically achieved, completely avoiding the defects of incomplete exhaust from thick felt or the "dead holes" caused by the crushing of thin felt.

[0040] Working principle: In operation, the carbon fiber felt of this invention enters the impregnation tank 2 along the feeding path. During the feeding process, the left and right adjustment components of the tension adjustment mechanism 1 work together. The drive component 12 of the left adjustment component drives the floating plate 45 to make slight up-and-down adjustments to the tension roller 13. The electrically controlled lifter 15 of the right adjustment component, in conjunction with the pressing block 14, drives the right tension roller 13 to move synchronously. The two form a dynamic tension balance network, absorbing tension fluctuations during the feeding process, ensuring that the felt always maintains a constant and appropriate tension, and preventing wrinkling or loosening.

[0041] It should be noted that the felt is impregnated area by area. When the felt to be impregnated passes through the detection box 52 of the pressure self-regulating mechanism 5, the conveying mechanism stops conveying, the solenoid 44 operates, pushing the floating plate 45 downward. The floating plate 45 moves downward along the mating guide block 47 until the pressure sensor 451 below the floating plate 45 retracts. This indicates that the bottom of the floating plate 45 has pressed down to the surface of the felt. At this point, the solenoid 44 stops intervening, and simultaneously the electrically controlled telescopic rod 53 intervenes, pushing the movable block 51 upward until the upper surface of the movable block 51 contacts the lower surface of the floating plate 45, and then stops moving upward. At the same time, when the movable block 51 is displaced within the detection box 52, it squeezes the fluid medium inside the detection box 52. This pressure change is transmitted to the regulating box 56 through the connecting pipe 54, pushing the limiting block 55 within the regulating box 56 to displace, thereby dynamically changing the physical limit point when the subsequent breathing-type squeezing mechanism 4 presses down. Its core adaptive logic is as follows: the thicker the felt, the higher the movable block 51 is lifted, and the limiting block 55 is adjusted accordingly to allow the upper extrusion plate 43 to have a larger absolute stroke; the thinner the felt, the lower the movable block 51 is lifted, and the downward stroke is reduced accordingly. Thus, at the mechanical and fluid linkage level, a benchmark for changing the absolute stroke and maintaining the relative compression ratio is automatically set, avoiding the defects of incomplete exhaust due to insufficient compression ratio of thick felt, or "dead holes" caused by excessive extrusion of thin felt.

[0042] Simultaneously, within the mating box 46 of the breathing extrusion mechanism 4, the equipment begins to execute an innovative "breathing" three-step sequence. The first step is dry pre-compression exhaust: the movable end of the electrically controlled extrusion rod 41 extends, driving the upper extrusion plate 43 to press down, mechanically pre-compressing the dry felt, forcibly expelling the air from the pores of the felt, and creating a "microscopic vacuum" environment inside; when the upper extrusion plate 43 touches the limiting block 55, it indicates that the pre-compression exhaust is complete; After pre-compression, the electrically controlled extrusion rod 41 continues to move the mating box 46 downwards. This positions the felt inside the impregnation tank 2. During this downward movement, the impregnation tank 2 first contacts the upper stop 32, causing it to retract, and finally moves below the lower deflection stop 33. Then, negative pressure liquid absorption and permeation are activated. After pre-compression, the electrically controlled extrusion rod 41 moves upwards, causing the upper extrusion plate 43 to move upwards. At this time, the upper extrusion plate 43 and the mating box 46 form a negative pressure structure similar to a "tube extraction." Under the action of negative pressure, the impregnation liquid in the impregnation tank 2 is smoothly drawn from bottom to top into the micropores of the felt through the through-holes on the bottom surface of the mating box 46. Air has been purged in the early stage, and the impregnation liquid penetrates without dead angles like a piston, eliminating the airlock effect. As the upper extrusion plate 43 moves upward, it will contact the baffle, which will drive the mating box 46 to move upward as a whole. (When the upper extrusion plate 43 initially moves upward, the mating box 46 cannot move upward because the upper surface of the mating box 46 contacts the lower deflection block 33. However, when the upper extrusion plate 43 can no longer move, the upward pulling force will overcome the elastic force of the lower deflection block 33, causing it to deform and move backward. At this time, the mating box 46 moves upward as a whole and moves out of the impregnation box 2.)

[0043] The third step is wet extrusion and adhesive control: After the liquid is saturated, the electrically controlled extrusion rod 41 moves down a second time to perform a second flexible extrusion on the wet felt, expelling excess impregnation liquid and ensuring extremely uniform adhesive content; at the same time, the upper extrusion plate 43, which rises to the end, will squeeze the extrusion hydraulic rod 49 on one side, causing the internal medium to move into the extruder 410. The movable end of the extruder 410 extends, causing the height of the floating plate 45 at the outlet to be appropriately lowered, playing a stable extrusion and shaping role during the output of the felt, and extruding excess adhesive a second time. Then the electrically controlled extrusion rod 41 moves down a certain amount. When the thickness is changed, the solenoid 44 is converted to suction, adsorbing the floating plate 45 to move up, and then the previous process is followed.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An impregnation apparatus for processing carbon fiber felt, comprising an impregnation tank (2) defining an impregnation space and a felt feeding path, characterized in that, Also includes: Breathing compression mechanism (4), pressure self-regulating mechanism (5) and tension regulating mechanism (1); The breathing extrusion mechanism (4) is located in the dry pre-compression chamber upstream of the impregnation space, and includes an extrusion plate and a driving component; the driving component drives the extrusion plate to pre-compress and exhaust the dry felt, and extrudes it again after the liquid absorption is completed to discharge excess impregnation liquid; The pressure self-regulating mechanism (5) is located upstream of the breathing compression mechanism (4) and includes a thickness sensing element and an adjustment component; the thickness sensing element obtains the real-time thickness of the felt, and the adjustment component dynamically adjusts the downward stroke of the drive component according to the thickness signal so that felts of different thicknesses maintain a constant compression ratio. The tension adjustment mechanism (1) is located on both sides of the impregnation tank (2) and includes two tension rollers (13). When the breathing extrusion mechanism (4) impregnates the felt, the two tension rollers (13) change position synchronously so that the felt remains taut.

2. The impregnation apparatus for processing carbon fiber felt according to claim 1, characterized in that; The tension adjustment mechanism (1) includes a left adjustment component and a right adjustment component. The left adjustment component and the right adjustment component are respectively provided on both sides of the impregnation tank (2). The left adjustment component includes a movable plate (11). A tension roller (13) is rotatably provided on the movable plate (11). The movable plate (11) moves up and down through a drive component (12). The right adjustment component includes a tension roller (13) provided on its mating frame. The tension roller (13) drives the mating pressing block (14) to move through an electrically controlled lifter (15). The mating pressing block (14) is connected to the tension roller (13).

3. The impregnation apparatus for processing carbon fiber felt according to claim 1, characterized in that; The immersion tank (2) is provided with a guide limiting mechanism (3), which includes a guide rod (34). The guide rod (34) has an installation groove, and a spring plate (31) is provided in the installation groove. An upper baffle (48) is provided on one side of the spring plate (31), and a lower deflection block (33) is provided below the upper baffle (48). The upper baffle (48) and the lower deflection block (33) are connected by a spring.

4. The impregnation apparatus for processing carbon fiber felt according to claim 1, characterized in that; The breathing extrusion mechanism (4) includes a mating box (46) and an upper extrusion plate (43). The bottom surface of the mating box (46) has several through holes. A mating guide block (47) is provided between the mating box (46) and the upper extrusion plate (43). A through groove is provided at the corresponding position of the upper extrusion plate (43). Passage grooves (461) are provided on both sides of the mating box (46) for the felt to move. A floating plate (45) is provided above the passage grooves (461). The floating plate (45) is slidably connected to the mating guide block (47). The mating guide block (47) has several through holes. An electromagnet (44) is provided on the upper extrusion plate (43), and a baffle is provided above the upper extrusion plate (43). A hydraulic extrusion rod (49) is provided between one side of the baffle and the upper extrusion plate (43). The hydraulic extrusion rod (49) is connected to the extruder (410) through a conveying pipe. The extruder (410) is moved by the flow of the medium. The extruder (410) is connected to the floating plate (45) at the outlet of the mating box (46). A connecting plate (42) is provided between the guide rods (34). An electric extrusion rod is provided between the connecting plate (42) and the upper extrusion plate (43).

5. The impregnation apparatus for processing carbon fiber felt according to claim 4, characterized in that; The contact surfaces of the mating box (46) with the upper baffle (48) and the lower deflection block (33) are arc surfaces, and the arc of the lower deflection block (33) is smaller than that of the upper baffle (48).

6. The impregnation apparatus for processing carbon fiber felt according to claim 4, characterized in that; The inner diameter of the groove of the upper extrusion plate (43) is the same as the outer diameter of the guide block (47).

7. The impregnation apparatus for processing carbon fiber felt according to claim 4, characterized in that; The mating guide block (47) and the electromagnet (44) are magnetically mated, and a pressure sensor (451) is provided below the mating guide block (47). The pressure sensor (451) is electrically connected to the electromagnet (44) through a controller.

8. The impregnation apparatus for processing carbon fiber felt according to claim 1, characterized in that; The pressure self-adjusting mechanism includes a detection box (52), a movable block (51) is provided inside the detection box (52), the detection box (52) is connected to an adjustment box (56) located outside the mating guide block (47) through the movable block (51), and a limiting block (55) is provided inside the adjustment box (56) as a movable section.

9. The impregnation apparatus for processing carbon fiber felt according to claim 8, characterized in that; The inner surface area of ​​the limiting block (55) is smaller than the inner surface area of ​​the regulating box (56), and the upper end of the movable block (51) is initially located at the bottom of the through groove (461). One side of the connecting pipe (54) is located in the lower half of the limiting box, and the other side is located in the upper half of the detection box (52).

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