A carbon fiber felt surface spraying device

Abstract

The present application relates to the technical fields of spraying equipment, and discloses a carbon fiber felt surface spraying equipment, which comprises a continuous treatment box fixedly connected to the inlet end of a drying assembly, another end of the continuous treatment box is sequentially fixedly provided with an impregnation treatment mechanism, a roller pressing conveying mechanism and a feeding conveying mechanism; a continuous spraying device is arranged in the continuous treatment box, the continuous spraying device comprises a plurality of extrusion rollers, a plurality of adsorption groove plates and a plurality of nozzles, the extrusion rollers are used for extruding excessive impregnation liquid of the carbon fiber felt; the extrusion rollers arranged in the continuous treatment box are used for continuously extruding the carbon fiber felt after impregnation treatment by using the clamping extrusion force generated during the opposite rotation of the two extrusion rollers, so that the excessive impregnation liquid in the carbon fiber felt can be actively extruded, and the bottom groove box arranged below the extrusion rollers is used for collecting the extruded impregnation liquid.

Description

Technical Field

[0001] This invention belongs to the technical field of spraying equipment, and more specifically, it relates to a spraying equipment for carbon fiber felt surface. Background Technology

[0002] Carbon fiber felt, as a fiber-reinforced material with high specific strength, high specific modulus, high temperature resistance, corrosion resistance, and good electrical conductivity, is widely used in composite material reinforcement, thermal insulation, electrode materials, aerospace, and new energy fields. Currently, the processing of carbon fiber felt typically employs a combination of impregnation and spraying equipment. First, the impregnation mechanism allows the carbon fiber felt to absorb the impregnation liquid, and then the spraying mechanism sprays a protective liquid onto the surface of the carbon fiber felt. However, in actual processing, due to the porous structure formed by multiple interwoven fibers within the carbon fiber felt, traditional spraying methods usually only allow the protective liquid to adhere to the outer surface of the carbon fiber felt, making it difficult to effectively penetrate the internal fiber regions. This results in uneven distribution of the protective liquid along the thickness direction of the carbon fiber felt, failing to adequately protect the internal fiber regions and affecting the overall bonding strength after subsequent curing.

[0003] Meanwhile, in existing spraying equipment, during continuous processing, the carbon fiber felt typically retains a significant amount of impregnation liquid after impregnation. Direct surface spraying with this excess liquid can hinder the diffusion of the protective liquid into the fiber gaps, reducing the effective contact area between the protective liquid and the fibers. Furthermore, excess liquid can accumulate in the sprayed area, affecting the stability of continuous production. In addition, most existing spraying structures employ a unidirectional spraying method, with the nozzle fixed to one side of the carbon fiber felt. This method is susceptible to variations in spraying distance, spraying angle, and the surface structure of the carbon fiber felt, leading to uneven coverage. Moreover, some of the sprayed liquid, lacking effective guidance, remains only on the surface of the carbon fiber felt after adhesion, failing to diffuse further into the internal structure along the fiber alignment, thus reducing the utilization efficiency of the protective liquid and its reinforcing effect.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a carbon fiber felt surface spraying equipment in order to achieve a more practical and valuable purpose. Summary of the Invention

[0005] This invention provides a carbon fiber felt surface spraying device to overcome the above-mentioned defects in the prior art.

[0006] The purpose and effect of the carbon fiber felt surface spraying equipment of the present invention are achieved by the following specific technical means: A carbon fiber felt surface spraying device includes a drying assembly. The inlet end of the drying assembly is fixedly connected to a continuous processing box. The other end of the continuous processing box is sequentially fixedly installed with an impregnation treatment mechanism, a roller conveying mechanism, and a feeding conveying mechanism. The continuous processing box is equipped with a continuous spraying device, which includes multiple sets of extrusion rollers, multiple sets of adsorption tank plates, and multiple sets of nozzles. The extrusion rollers expel excess impregnation liquid from the carbon fiber felt. The adsorption tank plate works in conjunction with the nozzle to achieve surface spraying and internal adhesion of the reinforced carbon fiber felt.

[0007] A further technical solution is that the continuous processing box includes a spray-oriented protective shell, and the spray-oriented protective shell is provided with side feed baffles at both ends near the drying component and the impregnation treatment mechanism. The side feed baffles are provided with a rectangular slot in the middle, and a brush assembly is provided on the side of the rectangular slot near the drying component and the impregnation treatment mechanism. The brush assembly performs surface treatment on the carbon fiber felt.

[0008] A further technical solution is provided, wherein a continuous spraying device is fixedly installed inside the continuous processing box. The continuous spraying device includes two sets of side rail grooves, which are fixedly connected to the inner wall of the spraying protective shell. The two sets of side rail grooves are arranged symmetrically, and a sliding groove is provided inside the two sets of side rail grooves. A drive motor is fixedly installed at one end of the sliding groove, and a threaded rod is rotatably installed at the output end of the drive motor. A cover plate assembly is slidably installed on the threaded rod.

[0009] A further technical solution is that the cover plate assembly includes a rectangular slot box, the rectangular slot box having an overall rectangular frame structure, including an upper top plate and a lower top plate arranged opposite each other, forming a hollow cavity between the upper top plate and the lower top plate, and slots symmetrically arranged along the length direction of the upper top plate and the lower top plate, with a number of circular spray holes arranged between the symmetrically arranged slots.

[0010] In a further technical solution, the upper and lower top plates have extensions on both sides. A rotating motor is fixedly installed inside the extension, and a pressing roller is fixedly installed at the output end of the rotating motor. The pressing roller includes an interface, and a supporting inner tube is fixedly connected to the interface. A roller shell is sleeved on the outside of the supporting inner tube, and the roller shell rotates between the extensions.

[0011] In a further technical solution, an upper cover plate is fixedly installed above the upper top plate of the central rectangular groove assembly, and a lower cover plate is fixedly installed below the lower top plate of the central rectangular groove assembly. The upper cover plate and the lower cover plate are sealed and fixed with the central rectangular groove assembly to form a cavity, and nozzles are fixedly installed inside the two cavities.

[0012] A further technical solution is that the nozzle includes an upper nozzle and a lower nozzle, the upper nozzle and the lower nozzle are arranged opposite to each other, the upper nozzle and the lower nozzle have opposite spraying directions, and the upper nozzle and the lower nozzle form a 35° inclined angle with the carbon fiber felt transport direction, so that the sprayed protective liquid can generate a lateral diffusion effect along the fiber arrangement direction while covering the surface of the carbon fiber felt.

[0013] A further technical solution is provided in which a central groove is provided between the upper and lower top plates of the rectangular slot box, which are arranged opposite each other. Two sets of adsorption plates are symmetrically installed inside the central groove. Each adsorption plate includes a pressure equalizing plate, and the pressure equalizing plate is fixedly connected to the slot hole. A solenoid valve plate is provided at the connection between the pressure equalizing plate and the slot hole.

[0014] A further technical solution is that a bottom groove box is fixedly installed below the lower cover plate, the bottom groove box is located below the extrusion roller, the bottom groove box is provided with an adsorption sponge, the adsorption sponge is located below the extrusion roller, and a spray tube plate assembly is fixedly installed on the outer side of the extrusion roller.

[0015] In a further technical solution, the spray nozzle assembly includes a mounting plate, which is fixedly installed on the outside of the spray protective shell. The mounting plate is provided with several feed nozzles, which are connected to the nozzles through pipes. An air inlet is fixedly installed below the feed nozzles, and the air inlet is connected to the bottom groove box, the extrusion roller, and the inside of the cover plate assembly.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The carbon fiber felt surface spraying equipment of the present invention uses an extrusion roller set inside a continuous processing tank. Utilizing the clamping and extruding force generated by the opposing rotation of two sets of extrusion rollers, the impregnated carbon fiber felt is continuously extruded. This allows excessive impregnation liquid within the carbon fiber felt to be actively squeezed out and collected in a bottom tank below the extrusion rollers, thereby regulating the impregnation liquid content within the carbon fiber felt. This structure ensures that the carbon fiber felt maintains a relatively stable liquid content before entering the subsequent spraying area, avoiding the problem in traditional processing where excessive residual impregnation liquid prevents the protective liquid from effectively penetrating the fiber gaps. It also reduces interference from excess liquid in the subsequent spraying process, improves the adhesion stability of the protective liquid on the carbon fiber felt surface, and provides a good foundation for the uniform diffusion and internal penetration of the protective liquid.

[0017] This invention discloses a carbon fiber felt surface spraying device. By arranging upper and lower nozzles opposite each other inside a cover plate assembly, a protective liquid can be simultaneously sprayed from both the upper and lower directions of the carbon fiber felt. The nozzles are angled along the conveying direction of the carbon fiber felt, allowing the sprayed protective liquid to diffuse along the fiber alignment direction while covering the carbon fiber felt surface. Furthermore, by arranging multiple sets of nozzles in a staggered manner, the spraying areas of adjacent nozzles are staggered, creating a continuous coverage effect. This avoids the problem of insufficient coverage in localized areas caused by the limited spraying range in traditional fixed-position spraying, allowing the protective liquid to adhere more evenly to the carbon fiber felt surface. This staggered spraying structure forms a continuous and stable protective layer on the carbon fiber felt surface, increasing the contact range between the protective liquid and the carbon fiber structure, and providing uniform liquid distribution conditions for subsequent negative pressure guided penetration.

[0018] This invention discloses a carbon fiber felt surface spraying device. Through an adsorption tank plate located inside a rectangular tank, and with the adjustment of a pressure equalizing plate and a solenoid valve plate, the adsorption tank plate generates a stable negative pressure adsorption airflow after spraying. The pressure equalizing plate disperses and adjusts the concentrated adsorption airflow, resulting in a uniformly distributed adsorption effect over the spraying area. The staggered arrangement of the adsorption tank plate and nozzles prevents the negative pressure airflow from directly acting on the protective liquid spraying area, avoiding rapid absorption of the protective liquid before it has fully diffused. This allows the protective liquid to gradually penetrate into the carbon fiber felt along the fiber gaps under the guidance of the airflow, improving the bonding between the protective liquid and the internal fiber structure. Simultaneously, under negative pressure, excess protective liquid that has not fully adhered to the carbon fiber felt can be guided by the adsorption tank plate into a recovery path and centrally processed through the bottom tank, thereby reducing protective liquid loss and improving its utilization rate. Through this structural combination, the carbon fiber felt not only achieves uniform surface coverage with protective liquid but also further enhances the penetration effect of the protective liquid into the internal fiber structure, forming a more stable bond between the protective liquid and the carbon fiber felt, and improving the overall stability of the carbon fiber felt during subsequent processing and use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the overall side view structure of the present invention; Figure 4 This is a schematic diagram of the overall appearance structure of the continuous processing box in this invention; Figure 5 This is a schematic diagram of the overall appearance structure of the continuous spraying device in this invention; Figure 6 This is a top view schematic diagram of the overall structure of the continuous spraying device in this invention; Figure 7 This is a schematic diagram of the overall side cross-section of the continuous spraying device in this invention; Figure 8 This is a schematic diagram of the overall appearance structure of the cover plate assembly in this invention; Figure 9 This is a schematic side view of the overall structure of the cover plate assembly in this invention; Figure 10 This is a schematic diagram of the overall exploded appearance of the cover plate assembly in this invention; Figure 11 This is a first side view of the overall exploded structure of the cover plate assembly in this invention; Figure 12 This is a second side view of the overall exploded structure of the cover plate assembly in this invention; Figure 13 This is a schematic diagram of the overall appearance structure of the rectangular slot box in this invention; Figure 14 This is a top view of the overall structure of the cover plate assembly in this invention.

[0022] Explanation of reference numerals in the attached figures: 1. Drying assembly; 2. Continuous processing chamber; 21. Spray protective shell; 22. Side feed baffle; 3. Impregnation treatment mechanism; 4. Roller conveyor mechanism; 5. Feeding conveyor mechanism; 6. Continuous spraying device; 61. Side rail groove; 62. Bottom groove box; 63. Extrusion roller; 631. Roller outer shell; 632. Interface; 633. Support inner tube; 64. Cover plate assembly; 641. Upper cover plate; 642. Central rectangular groove assembly; 6421. Rectangular groove box; 6422. Groove; 6423. Circular spray hole; 6424. Central interstitial groove; 643. Lower cover plate; 65. Slide groove; 66. Adsorption tank plate; 661. Solenoid valve plate; 662. Pressure equalizing plate; 67. Nozzle; 671. Upper nozzle; 672. Lower nozzle; 68. Spray tube plate assembly; 681. Mounting plate; 682. Feed nozzle; 683. Air inlet. Detailed Implementation

[0023] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0024] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] As attached Figure 1 To be continued Figure 14 As shown: The present invention provides a carbon fiber felt surface spraying equipment, including a drying component 1. The inlet end of the drying component 1 is fixedly connected to a continuous processing box 2, and the other end of the continuous processing box 2 is sequentially fixedly installed with an impregnation treatment mechanism 3, a roller pressing conveyor mechanism 4, and a feeding conveyor mechanism 5. The continuous processing box 2 is equipped with a continuous spraying device 6, which includes multiple sets of extrusion rollers 63, multiple sets of adsorption tank plates 66 and multiple sets of nozzles 67. The extrusion rollers 63 extrude excess impregnation liquid from the carbon fiber felt. The adsorption tank plate 66 and the nozzle 67 work together to achieve surface spraying and reinforce the internal adhesion of the carbon fiber felt. The protective liquid is sprayed onto the surface of the carbon fiber felt through the nozzle 67, and the airflow generated by the adsorption tank plate 66 guides the sprayed protective liquid to diffuse inward along the gaps between the fibers. This improves the contact between the protective liquid and the internal fiber structure of the carbon fiber felt, avoiding the problem of insufficient internal bonding caused by the protective liquid only staying on the surface in traditional spraying methods. This allows the carbon fiber felt to form a more stable protective structure during the subsequent drying and curing process.

[0027] Preferred options are shown in the appendix. Figure 1 To be continued Figure 4 The continuous processing box 2 includes a spray-direction protective shell 21. Side feed baffles 22 are provided at both ends of the spray-direction protective shell 21 near the drying assembly 1 and the impregnation treatment mechanism 3. A rectangular slot is provided in the middle of the side feed baffle 22. A brush assembly is provided on the side of the rectangular slot near the drying assembly 1 and the impregnation treatment mechanism 3. The brush assembly performs surface treatment on the carbon fiber felt. By providing side feed baffles 22 on both sides of the continuous processing box 2, the carbon fiber felt can maintain a stable conveying state when entering the continuous processing box 2, reducing the possibility of the carbon fiber felt shifting during continuous processing. Simultaneously, the brush assembly located at the rectangular slot position pre-treats the surface of the carbon fiber felt before and after entering the spraying area, cleaning impurities and loose fibers adhering to the surface of the carbon fiber felt, improving the contact effect between the protective liquid and the surface of the carbon fiber felt, thereby enhancing the stability of subsequent spraying treatments.

[0028] Preferred options are shown in the appendix. Figure 5 To be continued Figure 8 The continuous processing box 2 is equipped with a continuous spraying device 6, which includes two sets of side rail grooves 61. The two sets of side rail grooves 61 are fixedly connected to the inner wall of the spraying protective shell 21. The two sets of side rail grooves 61 are symmetrically arranged. The inner side of the two sets of side rail grooves 61 is provided with a sliding groove 65. A drive motor is fixedly installed at one end of the sliding groove 65. A threaded rod is rotatably installed at the output end of the drive motor. A cover plate assembly 64 is slidably installed on the threaded rod. When the continuous spraying device 6 is working, the drive motor inside the side rail groove 61 drives the threaded rod to rotate, causing the cover plate assembly 64 installed on the threaded rod to reciprocate along the sliding groove 65. The movement of the cover plate assembly 64 drives the nozzle 67 and the extrusion roller 63 to adjust their processing positions synchronously, so that the spraying area can cover different positions of the carbon fiber felt, improve the uniformity of the continuous spraying process, and avoid the problem of insufficient local protective liquid adhesion caused by fixed position spraying.

[0029] Preferred options are shown in the appendix. Figure 5 To be continued Figure 13The cover plate assembly 64 includes a rectangular slot box 6421. The rectangular slot box 6421 has a rectangular frame structure and includes an upper top plate and a lower top plate arranged opposite each other. A hollow cavity is formed between the upper top plate and the lower top plate. The upper top plate and the lower top plate are symmetrically provided with slots 6422 along the length direction. Several sets of circular spray holes 6423 are provided between the symmetrically arranged slots 6422. By setting the rectangular slot box 6421 to form corresponding spraying spaces, the nozzles 67 can spray protective liquid from the upper and lower sides of the carbon fiber felt respectively. At the same time, the slots 6422 and the circular spray holes 6423 are used to limit the spraying area, so that the protective liquid can be concentrated on the surface of the carbon fiber felt, reducing the outward diffusion of the protective liquid during the spraying process, improving the utilization efficiency of the protective liquid, and ensuring the uniform coverage of the carbon fiber felt surface during continuous spraying.

[0030] Preferred options are shown in the appendix. Figure 5 To be continued Figure 13 The upper and lower top plates have extensions on both sides. A rotating motor is fixedly installed inside each extension, and an extrusion roller 63 is fixedly installed at the output end of the rotating motor. The extrusion roller 63 includes an interface 632, to which a supporting inner tube 633 is fixedly connected. A roller shell 631 is sleeved on the outside of the supporting inner tube 633, and the roller shell 631 rotates between the extensions. When the carbon fiber felt passes between the extrusion rollers 63, the rotating motor inside the extension drives the extrusion rollers 63 to rotate, causing the two sets of extrusion rollers 63 to rotate synchronously in opposite directions. This creates a clamping and extruding effect on the carbon fiber felt located between the two sets of extrusion rollers 63, squeezing out excess impregnation liquid from the carbon fiber felt, thus maintaining a suitable liquid content after impregnation. Simultaneously, the cooperation between the supporting inner tube 633 and the roller shell 631 ensures that the extrusion rollers 63 maintain a stable support state during rotation, preventing deformation of the roller shell 631 during extrusion and affecting the uniformity of extrusion, thereby improving the stability of the continuous processing of the carbon fiber felt. The above-mentioned extrusion process can reduce the problem of the protective liquid being blocked due to excessive internal liquid during subsequent spraying, and create a more suitable adsorption and penetration environment inside the carbon fiber felt, thereby improving the effect of the protective liquid diffusing into the fiber gaps.

[0031] Preferred options are shown in the appendix. Figure 5 To be continued Figure 13An upper cover plate 641 is fixedly installed above the upper top plate of the central rectangular groove assembly 642, and a lower cover plate 643 is fixedly installed below the lower top plate of the central rectangular groove assembly 642. The upper cover plate 641 and the lower cover plate 643 are sealed and fixed with the central rectangular groove assembly 642 to form a cavity. Nozzles 67 are fixedly installed inside the two cavities. Through the sealed cavity formed between the upper cover plate 641, the lower cover plate 643, and the central rectangular groove assembly 642, the nozzles 67 can be set in a relatively independent spraying space to ensure... The protective liquid has a stable spraying environment during delivery. When the nozzle 67 is working, the sealed cavity can guide the sprayed protective liquid, allowing it to concentrate on the surface of the carbon fiber felt. At the same time, it reduces the diffusion of the protective liquid into other areas inside the continuous processing tank 2, reduces protective liquid loss, and improves the stability of the spraying process. Furthermore, the upper and lower cavities correspond to the upper and lower surfaces of the carbon fiber felt, respectively, allowing the carbon fiber felt to receive double-sided spraying treatment simultaneously. This enables the protective liquid to cover the fiber structure from different directions, improving the uniformity of the protective liquid's adhesion on the surface of the carbon fiber felt.

[0032] Preferred options are shown in the appendix. Figure 5 To be continued Figure 13 The nozzle 67 includes an upper nozzle 671 and a lower nozzle 672, which are arranged opposite to each other. The nozzles of the upper nozzle 671 and the lower nozzle 672 have opposite spray directions and form a 35° angle with the carbon fiber felt transport direction, so that the sprayed protective liquid can cover the surface of the carbon fiber felt while generating a lateral diffusion effect along the fiber arrangement direction. Furthermore, the upper nozzle 671 and the lower nozzle 672 are arranged correspondingly on the upper and lower sides of the carbon fiber felt, so that the protective liquid sprayed from the upper and lower sides can act on the surface of the carbon fiber felt and the internal fiber gaps at the same time. Because the nozzle 67 forms an angle with the carbon fiber felt transport direction, the protective liquid sprayed out not only generates vertical coverage but also... The protective liquid diffuses laterally along the fiber arrangement direction within the carbon fiber felt, increasing its diffusion range within the fiber structure. Furthermore, multiple sets of nozzles 67 are arranged in an X-shaped staggered pattern along the width of the carbon fiber felt, creating staggered spray areas between adjacent nozzles 67. The protective liquid areas sprayed from the upper nozzle 671 and the lower nozzle 672 overlap, thus avoiding the problem of insufficient local coverage caused by the spray spacing in traditional unidirectional spraying. This results in a continuous and uniform protective liquid coating layer on the surface of the carbon fiber felt. Through this X-shaped staggered spraying method, the protective liquid forms a multi-directional diffusion path on the surface of the carbon fiber felt, increasing the contact range between the protective liquid and the fibers, and providing a basis for uniform liquid distribution in subsequent adsorption and penetration treatment.

[0033] Preferred options are shown in the appendix. Figure 5 To be continued Figure 13The rectangular box 6421 has a central groove 6424 between its upper and lower top plates, which are arranged opposite each other. Two sets of adsorption plates 66 are symmetrically installed inside the central groove 6424. Each adsorption plate 66 includes a pressure equalizing plate 662, which is fixedly connected to the slot hole 6422. A solenoid valve plate 661 is provided at the connection between the pressure equalizing plate 662 and the slot hole 6422. When the nozzle 67 completes the spraying of the protective liquid, the adsorption plate 66 is activated, generating a negative pressure through the external adsorption mechanism, causing the protective liquid on the surface of the carbon fiber felt to diffuse into the fiber interior under the guidance of airflow. The solenoid valve plate 661 can control the opening and closing of the adsorption channel according to the processing status, allowing the adsorption... The adsorption plate 66 can adjust the adsorption intensity according to different stages to avoid the rapid loss of protective liquid caused by continuous negative pressure. At the same time, the pressure equalizing plate 662 is set between the adsorption plate 66 and the slot 6422. When the negative pressure airflow passes through the pressure equalizing plate 662, the pressure equalizing plate 662 can disperse the concentrated airflow, so that the negative pressure airflow originally concentrated at the local adsorption position is transformed into a uniform adsorption airflow covering the spraying area. Through the uniform negative pressure, the protective liquid sprayed on the surface of carbon fiber felt can gradually penetrate into the interior along the gaps between the fibers, and avoid the problem of the protective liquid being sucked away before it is fully diffused due to excessive local adsorption force. This improves the adhesion effect of the protective liquid inside the carbon fiber felt and enhances the bonding stability between the fibers.

[0034] Preferred options are shown in the appendix. Figure 5 To be continued Figure 13 A bottom groove box 62 is fixedly installed below the lower cover plate 643. The bottom groove box 62 is located below the extrusion roller 63 and is equipped with an absorbent sponge. A spray tube plate assembly 68 is fixedly installed on the outer side of the extrusion roller 63. When the extrusion roller 63 extrudes the carbon fiber felt, the excess impregnation liquid squeezed out by the extrusion roller 63 can flow downward and enter the bottom groove box 62. The absorbent sponge inside the bottom groove box 62 absorbs the outflowing impregnation liquid, preventing the production of impregnation liquid during the extrusion process. Excess liquid accumulates inside the continuous processing tank 2. Meanwhile, the bottom trough 62 is located below the extrusion roller 63, allowing the liquid extruded by the extrusion roller 63 to quickly enter the recovery area under gravity, improving liquid collection efficiency and reducing contamination of other structures in the continuous spraying device 6. Furthermore, when excess protective liquid that has not fully adhered to the surface of the carbon fiber felt is generated during the spraying process, the bottom trough 62 can work with the adsorption system to collect the excess liquid, enabling the protective liquid to be centrally processed, thereby reducing waste of protective liquid and improving the overall resource utilization rate in the spraying process.

[0035] Preferred options are shown in the appendix. Figure 5 To be continued Figure 13The spray nozzle assembly 68 includes a mounting plate 681, which is fixedly installed on the outside of the protective shell 21. The mounting plate 681 has several feed nozzles 682, which are connected to the nozzles 67 via pipes. An air inlet 683 is fixedly installed below each feed nozzle 682, and the air inlet 683 is connected to the bottom trough 62, the extrusion roller 63, and the cover plate assembly 64. By setting up the spray nozzle assembly 68, the external protective liquid can be delivered to the nozzles 67 through the feed nozzles 682, and the nozzles 67 can then be used to treat the carbon fiber. The continuous spraying treatment of the felt surface; at the same time, the air inlet 683 is connected to the bottom tank 62, the extrusion roller 63 and the cover plate assembly 64, so that when the external adsorption device is working, an airflow circulation path can be formed inside the continuous spraying device 6; when the air inlet 683 produces an adsorption effect, it first creates a negative pressure in the area of ​​the extrusion roller 63, so that the excess liquid generated during the extrusion process can quickly leave the extrusion area and enter the bottom tank 62 for collection; at the same time, the negative pressure airflow can act on the inside of the cover plate assembly 64, so that the adsorption tank plate 66 produces a uniform adsorption effect, thereby achieving an enhanced internal penetration effect after the protective liquid is sprayed.

[0036] Specific usage of this invention: When using this device, it is first installed in the continuous production and processing workshop of carbon fiber felt. The carbon fiber felt roll to be processed is installed on the feeding conveyor 5. The carbon fiber felt is continuously conveyed by the feeding conveyor 5, so that the carbon fiber felt passes through the roller conveyor 4, the impregnation treatment mechanism 3, the continuous treatment box 2 and the drying component 1 in sequence along the predetermined conveying path, thereby realizing the continuous processing of carbon fiber felt impregnation treatment, protective liquid spraying reinforcement and drying curing.

[0037] After the carbon fiber felt enters the processing path, it is first supported and guided by the roller conveying mechanism 4 to keep it flat during transport and avoid problems such as displacement and wrinkles due to its high flexibility. Then, the carbon fiber felt enters the impregnation treatment mechanism 3, where the impregnation liquid fully penetrates the porous structure formed by the interlacing of multiple fibers, creating a preliminary bonding foundation between the fibers.

[0038] After the impregnation treatment is completed, the carbon fiber felt continues to move towards the continuous processing box 2, at which point the continuous spraying device 6 starts working.

[0039] First, the drive motor inside the side rail groove 61 of the continuous spraying device 6 starts, driving the threaded rod to rotate, causing the cover plate assembly 64 mounted on the threaded rod to move along the slide groove 65. Since the extrusion roller 63 and the nozzle 67 are both installed at corresponding positions on the cover plate assembly 64, the cover plate assembly 64 can drive the extrusion roller 63 and the nozzle 67 to adjust synchronously during the movement of the cover plate assembly 64, so that the processing area inside the continuous processing box 2 can cover different conveying positions of the carbon fiber felt, improving the processing uniformity during continuous processing.

[0040] When the carbon fiber felt first passes through the area of ​​the extrusion rollers 63, the rotating motors located inside the extensions on both sides of the cover plate assembly 64 are started, driving the two sets of extrusion rollers 63 to rotate in opposite directions. Since the two sets of extrusion rollers 63 are located on the upper and lower sides of the carbon fiber felt respectively, the carbon fiber felt is subjected to a continuous clamping effect after entering between the two sets of extrusion rollers 63.

[0041] During the extrusion process of the extrusion roller 63, the excess impregnation liquid remaining inside the carbon fiber felt due to the impregnation treatment is subjected to pressure and discharged outward through the pores between the fibers, so that the carbon fiber felt maintains a suitable liquid content.

[0042] The above-mentioned extrusion process reduces the obstruction of the diffusion of the subsequent protective liquid caused by the excessive impregnation liquid inside the carbon fiber felt, allowing the subsequent spraying liquid to enter the gaps between the fibers; on the other hand, it avoids the problem of unstable adhesion of the protective liquid due to excessive internal liquid.

[0043] During the extrusion process, the excess impregnation liquid discharged from the extrusion roller 63 flows downward under its own gravity and enters the bottom tank 62 located below the extrusion roller 63. The extruded impregnation liquid is absorbed and stored by the adsorption sponge installed inside the bottom tank 62, thereby reducing the liquid residue inside the continuous processing tank 2.

[0044] Meanwhile, during the operation of the extrusion roller 63, the external adsorption device is connected to the air inlet 683, and negative pressure is generated inside the bottom trough 62, the extrusion roller 63 and the cover plate assembly 64 through the air inlet 683.

[0045] The negative pressure first helps to create a stable liquid discharge environment in the area of ​​the extrusion roller 63, so that the impregnating liquid under the extrusion pressure can be removed from the carbon fiber felt more quickly; at the same time, the negative pressure environment provides airflow driving force for the subsequent adsorption tank plate 66 in advance, so that a stable airflow control environment is formed inside the continuous spraying device 6.

[0046] Protective liquid spraying process: After the impregnation solution has been adjusted, the carbon fiber felt continues to enter the spraying area along the conveying direction.

[0047] At this time, the external protective liquid supply device starts working, and delivers protective liquid into the cover plate assembly 64 through the feed nozzle 682 in the spray tube plate assembly 68.

[0048] The protective liquid enters the spraying cavity formed by the upper cover plate 641, the lower cover plate 643 and the central rectangular groove assembly 642 through the feed nozzle 682, and is further delivered to the nozzle 67 located inside the spraying cavity.

[0049] The nozzle 67 includes an upper nozzle 671 disposed above the carbon fiber felt and a lower nozzle 672 disposed below the carbon fiber felt.

[0050] When nozzle 67 is working, upper nozzle 671 and lower nozzle 672 open simultaneously and spray protective liquid onto the fiber surface from the upper and lower directions of the carbon fiber felt, respectively.

[0051] Since the upper nozzle 671 and the lower nozzle 672 spray in opposite directions, the protective liquid can simultaneously cover both the upper and lower surfaces of the carbon fiber felt, thus forming a protective liquid adhesion area on both the upper and lower surfaces of the carbon fiber felt.

[0052] Compared to single-sided spraying, this bidirectional spraying method can reduce the insufficient spraying caused by the obstruction of the carbon fiber felt thickness direction, allowing the protective liquid to be distributed more evenly on the surface of the carbon fiber felt.

[0053] Furthermore, multiple sets of nozzles 67 are arranged in an X-shaped staggered pattern along the width direction of the carbon fiber felt.

[0054] That is, the adjacent nozzles 67 are not arranged in a direct correspondence, but are staggered along the width direction, so that the spray area formed by each nozzle 67 can partially overlap with the adjacent nozzles 67.

[0055] When the protective liquid is sprayed simultaneously from multiple nozzles 67, the spraying areas compensate for each other, ensuring that the entire width of the carbon fiber felt is covered by the protective liquid, thus avoiding the problem of local areas not being able to be sprayed due to the nozzle spacing.

[0056] Meanwhile, since the upper nozzle 671 and the lower nozzle 672 form an inclined angle with the carbon fiber felt conveying direction, the protective liquid sprayed onto the surface of the carbon fiber felt not only produces a vertical covering effect, but also produces a transverse flow trend due to the fiber arrangement direction.

[0057] During this process, the protective liquid initially diffuses along the gaps formed between the fibers, allowing it to gradually move from the surface area towards the interior of the fibers, thus providing a basis for subsequent negative pressure-assisted permeation.

[0058] Negative pressure assisted osmosis process: After the nozzle 67 finishes spraying the protective liquid, the protective liquid first forms a continuous covering layer on the surface of the carbon fiber felt, and after a short stay, the protective liquid can fully wet the fiber surface.

[0059] Subsequently, the adsorption tank plate 66 started working.

[0060] It should be noted that the adsorption tank plate 66 is not directly corresponding to the nozzle 67, but is arranged in a staggered manner with the nozzle 67.

[0061] Since the adsorption area of ​​the adsorption tank plate 66 and the spraying area of ​​the nozzle 67 are staggered, the negative pressure airflow will not directly act on the area of ​​the protective liquid that has just been sprayed, but will instead form a pressure difference inside the carbon fiber felt.

[0062] When the external adsorption device generates negative pressure through the air inlet 683, the negative pressure airflow enters the cover plate assembly 64 and passes through the adsorption groove plate 66 set in the middle groove 6424.

[0063] The negative pressure generated by the adsorption trough plate 66 first acts on the air in the pores inside the carbon fiber felt, causing the airflow inside the fiber pores to migrate from the outside to the inside.

[0064] Since the protective liquid has already covered the fiber surface, during the airflow migration process, the protective liquid is driven by the airflow and gradually moves inward along the continuous pores formed between the fibers.

[0065] Therefore, the adsorption process does not directly absorb the sprayed protective liquid, but uses the pressure difference to promote the penetration of the protective liquid along the fiber structure, so that the protective liquid can enter the internal areas that are difficult to reach by traditional spraying methods.

[0066] Furthermore, during the operation of the adsorption tank plate 66, the negative pressure airflow first passes through the pressure equalization plate 662.

[0067] Since the equalizing plate 662 is located between the adsorption tank plate 66 and the slot 6422, it can disperse the concentrated negative pressure airflow, so that different areas can produce a relatively balanced adsorption effect.

[0068] After adjustment by the pressure equalization plate 662, a uniform negative pressure environment is formed in the entire spraying area, so that the protective liquid in each position is subjected to a similar degree of penetration driving force.

[0069] Meanwhile, the opening degree of the adsorption channel can be controlled according to the carbon fiber felt conveying speed and the amount of protective liquid sprayed by the solenoid valve plate 661 set at the connection between the pressure equalizing plate 662 and the slot 6422.

[0070] When the amount of protective liquid sprayed is large, the solenoid valve plate 661 adjusts the adsorption channel to enhance the negative pressure effect; when the protective liquid has completed internal diffusion, the solenoid valve plate 661 reduces the adsorption effect, thereby preventing excessive migration of the protective liquid.

[0071] Excess protective liquid that does not enter the fiber is moved along the airflow path towards the adsorption tank plate 66 under negative pressure and collected in a concentrated manner through the bottom tank box 62, so that the excess protective liquid can be recycled.

[0072] Drying and curing process: After being extruded and adjusted, sprayed in both directions, and penetrated by negative pressure, the carbon fiber felt continues to enter the drying assembly 1.

[0073] The drying component 1 heats and cures the protective liquid on the surface of the carbon fiber felt and in the gaps between the internal fibers, so that the protective liquid gradually forms a stable protective layer.

[0074] Through the above processing, this device uses the extrusion roller 63 to adjust the impregnation liquid, and the nozzles 67 arranged vertically and in an X-shaped pattern to achieve continuous and uniform coverage of the protective liquid. Then, the adsorption tank plate 66, which is staggered with the nozzles 67, works in conjunction with the pressure equalizing plate 662 to form a progressive negative pressure penetration effect, so that the protective liquid undergoes a continuous process of "surface coverage - fiber wetting - airflow guidance - internal diffusion - curing into a film". This improves the bonding stability of the protective liquid inside the carbon fiber felt and avoids the problems of insufficient surface adhesion, insufficient internal penetration and uneven spraying that exist in traditional spraying methods.

[0075] The carbon fiber felt surface spraying equipment of the present invention uses extrusion rollers 63 set inside the continuous processing tank 2. Utilizing the clamping and extruding force generated during the opposite rotation of two sets of extrusion rollers 63, the impregnated carbon fiber felt is continuously extruded. This allows excessive impregnation liquid to be actively squeezed out and collected centrally through a bottom tank 62 located below the extrusion rollers 63, thereby regulating the impregnation liquid content inside the carbon fiber felt. This structure ensures that the carbon fiber felt maintains a relatively stable liquid content before entering the subsequent spraying area, avoiding the problem in traditional processing where excessive residual impregnation liquid prevents the protective liquid from effectively penetrating the fiber gaps. It also reduces interference from excess liquid in the subsequent spraying process, improves the adhesion stability of the protective liquid on the carbon fiber felt surface, and provides a good foundation for the uniform diffusion and internal penetration of the protective liquid.

[0076] The carbon fiber felt surface spraying device of the present invention uses upper nozzles 671 and lower nozzles 672 arranged opposite to each other inside the cover plate assembly 64 to allow the protective liquid to be sprayed synchronously from both the upper and lower directions of the carbon fiber felt. The nozzles 67 are inclined along the conveying direction of the carbon fiber felt, so that the sprayed protective liquid, while covering the surface of the carbon fiber felt, also diffuses along the fiber alignment direction. Simultaneously, by arranging multiple sets of nozzles 67 in a staggered manner, the spraying areas of adjacent nozzles 67 are staggered to form a continuous coverage effect, thereby avoiding the problem of insufficient coverage in local areas caused by the limited spraying range in traditional fixed-position spraying, allowing the protective liquid to adhere more evenly to the surface of the carbon fiber felt. Through the above-mentioned staggered spraying structure, the protective liquid forms a continuous and stable coating layer on the surface of the carbon fiber felt, increasing the contact range between the protective liquid and the carbon fiber structure of the felt, and providing uniform liquid distribution conditions for subsequent negative pressure guided penetration.

[0077] The carbon fiber felt surface spraying equipment of the present invention utilizes an adsorption tank plate 66 disposed inside a rectangular tank box 6421, and in conjunction with the regulating action of a pressure equalizing plate 662 and a solenoid valve plate 661, to generate a stable negative pressure adsorption airflow after spraying. The pressure equalizing plate 662 disperses and regulates the concentrated adsorption airflow, resulting in a uniformly distributed adsorption effect in the spraying area. The staggered arrangement of the adsorption tank plate 66 and the nozzles 67 prevents the negative pressure airflow from directly acting on the protective liquid spraying area, avoiding the rapid absorption of the protective liquid before it has fully diffused. This allows the protective liquid to be guided by the airflow along the internal fibers of the carbon fiber felt. The protective liquid gradually penetrates into the interior through the gaps, improving the bonding between the protective liquid and the internal fiber structure. At the same time, under negative pressure, excess protective liquid that has not fully adhered to the interior of the carbon fiber felt can be guided into the recycling path by the adsorption tank plate 66 and centrally processed through the bottom tank box 62, thereby reducing protective liquid loss and improving protective liquid utilization. Through the above structural combination, the carbon fiber felt can not only achieve uniform surface coverage of protective liquid, but also further enhance the penetration effect of protective liquid into the internal fiber structure, so that the protective liquid and carbon fiber felt form a more stable bonding relationship, improving the overall stability of the carbon fiber felt in subsequent processing and use.

[0078] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A carbon fiber felt surface spraying device, comprising a drying assembly (1), characterized in that: The inlet end of the drying assembly (1) is fixedly connected to a continuous processing box (2), and the other end of the continuous processing box (2) is sequentially fixedly installed with an impregnation treatment mechanism (3), a roller conveyor mechanism (4) and a feeding conveyor mechanism (5). The continuous processing box (2) is equipped with a continuous spraying device (6), which includes an extrusion roller (63), an adsorption tank plate (66), and a nozzle (67). The extrusion roller (63) is set on the carbon fiber felt conveying path and is used to extrude the impregnated carbon fiber felt. The nozzle (67) is correspondingly arranged with the adsorption tank plate (66) to spray the carbon fiber felt and promote the diffusion of the spray liquid into the carbon fiber felt through adsorption.

2. The carbon fiber felt surface spraying equipment according to claim 1, characterized in that: The continuous processing box (2) includes a spray protective shell (21). The spray protective shell (21) is provided with side feed baffles (22) at both ends near the drying assembly (1) and the impregnation treatment mechanism (3). The side feed baffles (22) are provided with a rectangular slot in the middle. A brush assembly is provided on the side of the rectangular slot near the drying assembly (1) and the impregnation treatment mechanism (3).

3. The carbon fiber felt surface spraying equipment according to claim 1, characterized in that: The continuous spraying device (6) includes two sets of side rail grooves (61), which are fixedly connected to the inner wall of the spraying protective shell (21) and are arranged opposite to each other. The side rail grooves (61) are provided with sliding grooves (65) inside, and a drive motor is provided inside the sliding grooves (65). The output end of the drive motor is connected to a threaded rod, and a cover plate assembly (64) is slidably installed on the threaded rod.

4. The carbon fiber felt surface spraying equipment according to claim 3, characterized in that: The cover plate assembly (64) includes a rectangular slot box (6421), which has a rectangular frame structure and includes an upper top plate and a lower top plate arranged opposite to each other. A hollow cavity is formed between the upper top plate and the lower top plate. The upper top plate and the lower top plate are respectively provided with slots (6422) along the length direction. A plurality of circular spray holes (6423) are provided between the two sets of slots (6422).

5. The carbon fiber felt surface spraying equipment according to claim 4, characterized in that: The rectangular slot box (6421) has extensions on both sides of the upper and lower top plates, and a rotating motor is provided inside the extension. The output end of the rotating motor is connected to a pressing roller (63). The pressing roller (63) includes an interface (632), a supporting inner tube (633), and a roller shell (631). The roller shell (631) is sleeved on the outside of the supporting inner tube (633) and rotatably disposed between the extensions.

6. The carbon fiber felt surface spraying equipment according to claim 5, characterized in that: The upper top plate of the rectangular slot (6421) is fixedly connected to the upper cover plate (641), and the lower top plate of the rectangular slot (6421) is fixedly connected to the lower cover plate (643); a spraying cavity is formed between the upper cover plate (641), the lower cover plate (643) and the rectangular slot (6421), and a nozzle (67) is provided inside the spraying cavity.

7. The carbon fiber felt surface spraying equipment according to claim 6, characterized in that: The nozzle (67) includes an upper nozzle (671) and a lower nozzle (672); the upper nozzle (671) and the lower nozzle (672) are arranged opposite to each other, and the spraying directions of the upper nozzle (671) and the lower nozzle (672) are opposite; the spraying directions of the upper nozzle (671) and the lower nozzle (672) form an inclined angle with the carbon fiber felt conveying direction.

8. The carbon fiber felt surface spraying equipment according to claim 7, characterized in that: The rectangular slot box (6421) has a central slot (6424) between the upper and lower top plates, and an adsorption slot plate (66) is provided inside the central slot (6424); the adsorption slot plate (66) includes a pressure equalizing plate (662), the pressure equalizing plate (662) is connected to the slot hole (6422), and a solenoid valve plate (661) is provided at the connection position between the pressure equalizing plate (662) and the slot hole (6422).

9. A carbon fiber felt surface spraying device according to claim 8, characterized in that: A bottom groove box (62) is fixedly installed below the lower cover plate (643), and the bottom groove box (62) is located below the extrusion roller (63); the bottom groove box (62) is provided with an adsorption sponge inside, and a spray tube plate assembly (68) is fixedly installed on the outside of the extrusion roller (63).

10. A carbon fiber felt surface spraying device according to claim 9, characterized in that: The spray nozzle assembly (68) includes a mounting plate (681), which is fixedly installed on the outside of the spray protective shell (21); the mounting plate (681) is provided with a feed nozzle (682), which is connected to the nozzle (67); an air inlet (683) is provided below the feed nozzle (682), which is connected to the bottom slot box (62), the extrusion roller (63) and the inside of the cover plate assembly (64).

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