High-pressure airflow preparation device for high-performance composite fiber felt and its application method

Abstract

This invention belongs to the field of composite material manufacturing, specifically relating to a high-pressure airflow process device for preparing high-performance composite fiber felt and its application. The high-pressure airflow process device for preparing high-performance composite fiber felt includes an external frame, a transverse frame mechanism, a longitudinal frame mechanism, a fiber transfer and cutting mechanism, an airflow generating mechanism, a mixing tank, and an air duct mechanism. This invention also provides an application of the high-pressure airflow process device for preparing high-performance composite fiber felt, which includes the following steps: according to processing requirements, the material to be processed is placed into the fiber transfer and cutting mechanism for cutting, and then the processed material is transported to the mixing tank; then, air is converted into a non-directional high-pressure airflow by a fan, and the high-pressure airflow is converted into a non-directional turbulent flow after passing through a baffle plate; the non-directional turbulent flow continuously disperses the material to be processed to obtain a uniformly dispersed fiber felt material.

Description

Technical Field

[0001] This invention belongs to the field of composite material manufacturing, specifically relating to a high-pressure airflow preparation device for forming high-performance composite fiber felt and its usage method. Background Technology

[0002] Fiber felt is a new type of material that is low-cost, lightweight, and has good overall performance, including corrosion resistance and excellent mechanical properties. With the increasing demand for lightweight, high-strength materials in the industrial market, woven fabrics made from continuous fiber prepregs have poor shapeability and are easily damaged during production, leading to compromised product performance. Fiber felt, however, possesses excellent shapeability, giving it advantages that continuous fiber fabrics cannot match, thus leading to its widespread application.

[0003] Currently, the main processing technologies for fiber felt materials include wet papermaking and direct solid-phase mechanical needle punching. Wet papermaking involves placing one or more pre-cut fibers in a large vat of liquid medium. Buoyancy and the inertia of the flowing liquid disperse the clumps of fibers. The dispersed fiber slurry is then extruded using a mold, filtered through pre-set mesh openings to remove the liquid medium, and finally dried to obtain the final fiber felt material. Mechanical needle punching, on the other hand, involves first dispersing pre-cut fibers using a tearing machine, then directly needle punching them. The reciprocating motion of the needles further promotes uniform dispersion. However, current mainstream processing technologies have defects such as residual impurities, organic solvents, uneven fiber distribution, pores, and difficulty in overcoming density differences. For example, in the papermaking process, a certain amount of liquid medium will remain in the dried felt material. This will cause the residual medium on the fibers to volatilize and generate cavities or bubbles during subsequent processing, which will lead to a decrease in the mechanical properties of the board. Patent application CN113584929A proposes an extrusion-type cellulose roll papermaking device. The equipment uses a dehydration process involving extrusion, but this method struggles to effectively remove water, leading to residue buildup. While subsequent heating removes water, it creates cavities or air bubbles in the fibers, reducing their mechanical properties and ultimately limiting their usability. Similarly, although mechanical needle-punching eliminates liquid residue in fiber felts, the high-speed reciprocating motion of the needles repeatedly hooks and punctures the fibers, causing breakage and significantly reducing the felt's performance. In summary, a common problem in fiber blending felt production is overcoming density differences that prevent uniform mixing and localized fiber enrichment. Therefore, reducing impurities, avoiding solvent residue, inhibiting fiber breakage, overcoming uneven blending of fibers with varying densities, and improving the felt's mechanical properties are pressing technical challenges in fiber felt production. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a high-pressure airflow preparation device for high-performance composite fiber felt forming, which includes an outer frame (1), a transverse frame mechanism (2), a longitudinal frame mechanism (3), a fiber transfer and cutting mechanism (4), an airflow generating mechanism (5), a mixing box (6), and an air passage mechanism (7). The transverse frame mechanism (2) is located at the bottom of the inner side of the outer frame (1) and is used to fix the airflow generating mechanism (5). The longitudinal frame mechanism (3) is longitudinally fixed to the inner side of the outer frame (1) and is used to connect the mixing box (6), so that the mixing box (6) can perform longitudinal mechanical movement along the outer frame (1). The airflow generating mechanism (5) is fixed above the transverse frame mechanism (2). The mixing box (6) is installed above the airflow generating mechanism (5), inside the outer frame (1), and fixed to the longitudinal frame mechanism (3), so that the mixing box (6) can make longitudinal mechanical movement along the outer frame (1). The air passage mechanism (7) is located in the lower part of the mixing box (6) and fixed to the inner wall of the mixing box (6) to limit the displacement of the mixing box (6) caused by the airflow. The fiber transfer and cutting mechanism (4) is located above the side of the mixing box (6) and fixed to the side of the mixing box (6), so that the shredded material to be processed falls into the mixing box (6). The fiber transfer and cutting mechanism (4) includes a fiber guide groove (4-1), a fiber positioning roller (4-2), and a fiber transfer... The feed roller (4-3), fiber rotary cutting device (4-4), and fiber transfer mechanism (4) are connected to the mixing box (6), and the material to be processed is oriented through the fiber guide groove (4-1) to prevent the material to be processed from being squeezed outward when it is transferred and pressurized by the subsequent fiber transfer roller (4-3), thereby preventing the fiber rotary cutting device (4-4) from failing to work effectively due to the fiber width exceeding the working width. The working width of the fiber rotary cutting device (4-4) is determined by the width of the fiber guide groove (4-1). One fiber positioning roller (4-2) and one fiber transfer roller (4-3) are set as a group, and a total of 3 groups are set. Each group is set on the fiber guide groove (4-1) in an alternating manner. The material to be processed is oriented through the fiber guide groove (4-1) to prevent the material to be processed from being squeezed outward when it is transferred and pressurized by the subsequent fiber transfer roller (4-3). The fiber positioning roller (4-2) and fiber transfer roller (4-3) work together to fix and tension the material to be processed, so as to achieve stable transmission of the width and speed of the material to be processed; the airflow generating mechanism (5) includes a fan (5-1) and a fixed base (5-2), which provide the wind power source for the whole equipment and can adjust the airflow intensity; the mixing box (6) is used to mix the material to be processed. It is a hollow cuboid composed of a screen plate with adjustable hole size on the top and bottom, which is sealed on all sides. The screen plate can allow airflow, and the mixing box (6) can limit the distribution space of the material to be processed; the air passage mechanism (7) mainly includes a connecting mechanism (7-1), a baffle plate (7-2), and a follow-up deflection mechanism (7-3);The connecting mechanism (7-1) consists of a short connecting arm (7-4), a long connecting arm (7-5), and a fixed shaft (7-6) for connecting the two connecting arms. The short connecting arm (7-4) is used to connect the follower deflection mechanism (7-3), and the long connecting arm (7-5) is used to connect the mixing tank (6). The connecting mechanism (7-1) realizes the connection between the follower deflection mechanism (7-3) and the mixing tank (6) through the movement of the long connecting arm (7-5) and the short connecting arm (7-4). In the coordinated motion, the follower deflection mechanism (7-3) consists of a frame (7-7) and a rotating shaft (7-8); the rotating shaft (7-8) can only rotate axially. The baffle (7-2) is fixed to the frame (7-7), and the frame (7-7) is fixed to the inner wall of the mixing box (6). The baffle (7-2) generates a velocity difference in the airflow from the fan (5-1), thereby forming an asymmetrical flow of airflow, which is eventually transformed into non-directional turbulence to disperse the material to be processed. The degree of turbulence is changed by altering the angle between the axis of the spoiler (7-2) and the direction of the high-pressure airflow generated by the fan (5-1). One end of the short connecting arm (7-4) is connected to the rotating shaft (7-8). The lengths of the long connecting arm (7-5) and the short connecting arm (7-4) are adjusted according to the material to be processed. When the mixing box (6) moves longitudinally, it drives the long connecting arm (7-5) to move up and down. At the same time, due to the effect of the fixed shaft (7-6), the short connecting arm (7-4) moves... The movement of the baffle (7-2) along with the movement of the mixing box (6) will cause it to deflect. Under the movement of the long connecting arm (7-5) and the short connecting arm (7-4), the short connecting arm (7-4) drives the rotating shaft (7-8) to rotate, causing the follow-up deflection mechanism (7-3) to deflect the baffle (7-2). The deflection angle of the baffle (7-2) is controlled by the connecting mechanism (7-1) to achieve adjustable and controllable airflow, speed, and direction within the mixing box (6).

[0005] This invention also provides a method for using a high-pressure airflow preparation device for forming high-performance composite fiber felt, which includes the following steps: according to processing requirements, the material to be processed is placed into the fiber cutting mechanism (4) for cutting, and then the processed material is transported to the mixing box (6) at a transmission speed of 200-300 cm / min and a rotation speed of 10-400 r / min; then the air is converted into a directional high-pressure airflow by a blower (5-1), the rotation speed of the blower (5-1) is 10-2950 r / min, and the high-pressure airflow flow rate is 20-5690 m³ / min. 3 / h, the airflow pressure is 100-8957Pa. The directional high-pressure airflow is transformed into non-directional turbulence after passing through the baffle (7-2). The degree of turbulence changes with the deflection angle of the baffle (7-2). The baffle (7-2) is deflected by the connecting mechanism (7-1). The deflection angle of the baffle (7-2) refers to the angle between the axis of the baffle (7-2) and the direction of the high-pressure airflow generated by the fan (5-1). The deflection angle range of the baffle (7-2) is -90° to 90°. The length adjustment range of the short connecting arm (7-4) is 15cm to 45cm, and the length adjustment range of the long connecting arm (7-5) is 50cm to 100cm. The degree of non-directional turbulence is positively correlated with the deflection angle. The non-directional turbulence is continuously dispersed in the material to be processed for 5 to 30 minutes to obtain a uniformly dispersed fibrous felt material.

[0006] Furthermore, the material to be processed is one or any combination of carbon fiber, basalt fiber, glass fiber, hemp fiber, aramid fiber, or PA-6, PA-66, PP, PE, PLA, PC, PEEK, and PI.

[0007] Furthermore, the fiber positioning roller (4-2) and fiber transfer roller (4-3) are cylindrical materials and can rotate; the fan (5-1) can convert air into high-pressure airflow; the fixed base (5-2) has a quick-release latch structure, which facilitates disassembly when replacing or repairing the airflow.

[0008] Furthermore, the spoiler (7-2) is made of one of PC, PVC, PMMA, or PP, which is lightweight and can improve the sensitivity of the follow-up deflection mechanism (7-3) and extend the service life of the follow-up deflection mechanism (7-3).

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The existing technology reports that the production process of felt materials will produce problems such as impurities, solvent residues, decreased fiber mechanical properties, fiber breakage, and difficulty in uniformly blending multiple fibers with different densities to make felt. For example, it is difficult to blend multi-component fibers, fiber stratification and uneven dispersion caused by the density difference of multi-component fibers, mechanical needle punching damage, and processing defects such as auxiliary agents, solvent residues, and broken fibers generated by wet dispersion.

[0011] The high-pressure airflow preparation device for high-performance composite fiber felt material forming obtained by this invention has the following advantages by utilizing the synergistic control of the device, process, and process parameters:

[0012] Based on the composition and proportion of the materials to be processed, the system achieves better uniform mixing of the materials by synergistically controlling parameters such as transfer speed, high-pressure airflow, degree of non-directional turbulence, wind speed, and wind direction, while avoiding uneven dispersion of the materials. It can achieve mixing of both the same type of material and materials of different densities, effectively eliminating the adverse effects of density differences between fibers and fiber delamination. At the same time, it achieves continuous and low-cost production of felt materials with uniform mixing, no damage to mechanical properties, no impurities or solvent residues, high temperature resistance, strong thermal stability, high efficiency, and no broken fibers. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a high-performance composite fiber felt forming device based on high-pressure airflow in the invention;

[0014] Figure 2 This is a front sectional view of a high-performance composite fiber felt forming device based on high-pressure airflow in the invention;

[0015] Figure 3 This is a schematic diagram of the fiber transfer and cutting mechanism in a high-performance composite fiber felt forming device based on high-pressure airflow in the invention.

[0016] Figure 4 This is a cross-sectional view of the fiber transfer and cutting mechanism in a high-pressure airflow-based high-performance composite fiber felt forming device in the invention.

[0017] Figure 5 This is a schematic diagram of the air passage mechanism in a high-pressure airflow-based high-performance composite fiber felt forming device. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0019] Example 1

[0020] The high-pressure airflow preparation high-performance composite fiber felt forming device includes an outer frame (1), a transverse frame mechanism (2), a longitudinal frame mechanism (3), a fiber transfer and cutting mechanism (4), an airflow generating mechanism (5), a mixing tank (6), and an air passage mechanism (7). The transverse frame mechanism (2) is located at the bottom inside the outer frame (1) and is used to fix the airflow generating mechanism (5). The longitudinal frame mechanism (3) is longitudinally fixed to the inside of the outer frame (1) and is used to connect the mixing tank (6), so that the mixing tank (6) can move longitudinally along the outer frame (1). The airflow generating mechanism (5) is fixed above the transverse frame mechanism (2), and the mixing tank (6) is installed on the airflow generating mechanism. Above the structure (5), inside the outer frame (1), and fixed to the longitudinal frame mechanism (3), the mixing box (6) can move longitudinally along the outer frame (1). The air passage mechanism (7) is located in the lower part of the mixing box (6) and fixed to the inner wall of the mixing box (6) to limit the displacement of the mixing box (6) caused by the airflow. The fiber transfer and cutting mechanism (4) is located above the side of the mixing box (6) and fixed to the side of the mixing box (6), so that the shredded material to be processed falls into the mixing box (6). The fiber transfer and cutting mechanism (4) includes a fiber guide groove (4-1), a fiber positioning roller (4-2), a fiber transfer roller (4-3), and a fiber spindle. The cutting device (4-4) and the fiber transfer and cutting mechanism (4) are connected to the mixing box (6), and the material to be processed is oriented through the fiber guide groove (4-1) to avoid the material to be processed being squeezed outward when it is transferred and pressurized by the subsequent fiber transfer roller (4-3), thereby avoiding the fiber rotary cutting device (4-4) from not working effectively due to the fiber width exceeding the working width. The working width of the fiber rotary cutting device (4-4) is determined by the width of the fiber guide groove (4-1). One fiber positioning roller (4-2) and one fiber transfer roller (4-3) are set as a group, and a total of 3 groups are set. The 3 groups are set on the fiber guide groove (4-1) in an alternating manner. By the material to be processed is placed on the fiber guide groove (4-1), the fiber transfer and cutting mechanism (4-4) is oriented to avoid the material to be processed being squeezed outward when it is transferred and pressurized by the subsequent fiber transfer roller (4-3), thereby avoiding the fiber rotary cutting device (4-4) from not working effectively. The position roller (4-2) and the fiber transfer roller (4-3) work together to fix and tension the material to be processed, so as to achieve stable transmission of the width and speed of the material to be processed; the airflow generating mechanism (5) includes a fan (5-1) and a fixed base (5-2), which provide the wind power source for the whole equipment and can adjust the airflow intensity; the mixing box (6) is used to mix the material to be processed. It is a hollow cuboid composed of a screen plate with adjustable hole size on the top and bottom, which is sealed on all sides. The screen plate can allow airflow, and the mixing box (6) can limit the distribution space of the material to be processed; the air passage mechanism (7) mainly includes a connecting mechanism (7-1), a baffle plate (7-2), and a follow-up deflection mechanism (7-3);The connecting mechanism (7-1) consists of a short connecting arm (7-4), a long connecting arm (7-5), and a fixed shaft (7-6) for connecting the two connecting arms. The short connecting arm (7-4) is used to connect the follower deflection mechanism (7-3), and the long connecting arm (7-5) is used to connect the mixing tank (6). The connecting mechanism (7-1) realizes the coordinated movement of the follower deflection mechanism (7-3) and the mixing tank (6) through the movement of the long connecting arm (7-5) and the short connecting arm (7-4). The follower deflection mechanism (7-3) consists of a frame (7-7) and a rotating shaft (7-8). The rotating shaft (7-8) can only rotate axially. The baffle (7-2) is fixed on the frame (7-7), and the frame (7-7) is fixed on the inner wall of the mixing tank (6). The baffle (7-2) uses the velocity difference generated by the airflow passing over the upper and lower surfaces to form an asymmetrical flow of airflow, thereby creating turbulence. Used to disperse the material to be processed, and to change the degree of turbulence by changing the angle between the axis of the baffle (7-2) and the direction of the high-pressure airflow generated by the fan (5-1). One end of the short connecting arm (7-4) is connected to the rotating shaft (7-8). The lengths of the long connecting arm (7-5) and the short connecting arm (7-4) are adjusted according to the material to be processed. When the mixing box (6) moves longitudinally, it will drive the long connecting arm (7-5) to move up and down. At the same time, due to the action of the fixed shaft (7-6), the short connecting arm (7-4) will also move, so that the baffle (7-2) deflects with the movement of the mixing box (6). Under the movement of the long connecting arm (7-5) and the short connecting arm (7-4), the short connecting arm (7-4) drives the rotating shaft (7-8) to rotate, and the follow-up deflection mechanism (7-3) drives the baffle (7-2) to deflect, so as to change the air volume, air speed and air direction in the mixing box (6).

[0021] Example 2

[0022] Weigh T-300 grade carbon fiber bundles and PA-66 fibers at a mass ratio of 1:4, and place them sequentially into the fiber transfer and cutting mechanism (4) along the fiber guide groove (4-1). The fiber transfer speed is 240 cm / min, and the rotation speed is 60 r / min. Cut the fibers into 4 cm long fiber segments and place them into the mixing box (6). Then adjust the lengths of the long connecting arm (7-5) and the short connecting arm (7-4) to 65 cm and 35 cm respectively, and fix them with the fixed shaft (7-6). Under the action of the long and short connecting arms, the angle range of the baffle is (-45° to 45°). Then, the speed of the fan (5-1) is set to 1450 r / min through the airflow generating mechanism (5), so that the airflow is maintained at 2500 m³ / min. 3 / h, wind pressure is 5500Pa, the baffle (7-2) uses the velocity difference generated by the airflow passing through the upper and lower surfaces to form an asymmetrical flow of airflow, thereby creating turbulence. After being dispersed for 15 minutes under high pressure airflow and non-directional turbulence, fiber felt material 1 is obtained.

[0023] Example 3

[0024] Weigh out continuous T-300 grade carbon fiber bundles, continuous basalt fibers, and PA-66 fibers in a mass ratio of 1:1:8, and place them sequentially into the fiber transfer and cutting mechanism (4) along the fiber guide groove (4-1). The transfer speed is 200 cm / min, and the rotation speed is 80 r / min. Cut the fibers into 3 cm long fiber segments and place them into the mixing box (6). Then adjust the lengths of the long connecting arm (7-5) and the short connecting arm (7-4) to 75 cm and 25 cm respectively, and fix them with the fixed shaft (7-6). Under the action of the long and short connecting arms, the angle range of the baffle is (-15° to 15°). Then, the speed of the fan (5-1) is set to 2000 r / min through the airflow generating mechanism (5), so that the airflow is maintained at 5100 m³ / min. 3 / h, wind pressure is 8420Pa, the baffle (7-2) uses the velocity difference generated by the airflow passing through the upper and lower surfaces to form an asymmetrical flow of airflow, thereby creating turbulence. After being dispersed for 20 minutes under high pressure airflow and non-directional turbulence, fiber felt material 2 is obtained.

[0025] Example 4

[0026] First, continuous basalt fiber and glass fiber are weighed according to a basalt fiber:glass fiber mass ratio of 1:1, and then placed into the fiber cutting mechanism (4) along the fiber guide groove (4-1). The transmission speed is set to 300 cm / min and the rotation speed is 120 r / min. The fiber is cut into 2 cm long fiber segments and placed into the mixing box (6). Then, the lengths of the long connecting arm (7-5) and the short connecting arm (7-4) are adjusted to 55 cm and 45 cm respectively, and fixed with the fixed shaft (7-6). Under the action of the long and short connecting arms, the angle range of the baffle is (-75° to 75°). Then, the speed of the fan (5-1) is set to 2950 r / min through the airflow generating mechanism (5), so that the airflow is maintained at 5690 m³ / min. 3 / h, wind pressure is 8957Pa, the baffle (7-2) uses the velocity difference generated by the airflow passing over the upper and lower surfaces to form an asymmetrical flow of airflow, thereby creating turbulence. After being dispersed for 25 minutes under high pressure airflow and non-directional turbulence, fiber felt material 3 is obtained.

[0027] To facilitate testing the uniformity of different felt materials, Examples 2 and 3, which inherently contain thermoplastic fibers, were respectively subjected to hot pressing to obtain two composite material sheets, each with dimensions of (16cm x 22cm x 5mm). Example 2 used a hot pressing process at 5MPa and 250℃; Example 3 used a hot pressing process at 5MPa and 180℃. For Example 4, since the felt material itself does not contain resin fibers, additional D-99 epoxy resin was added to the felt material, and basalt fiber: glass fiber: D-99 epoxy resin were vacuum impregnated in a mass ratio of 1:1:8. Simultaneously, a mold was used to ensure that the dimensions of the produced sheet were the same as in Examples 2 and 3.

[0028] To verify the homogeneity of the material, three plates from Examples 2-4 were sampled and weighed using a five-point sampling method. The density was calculated to verify the uniformity of the plates. The plate size was (50mm x 50mm x 5mm). Each sample was weighed using an analytical balance. The specific parameters of each sample in Examples 2 (2-1-2-5) and 3 (3-1-3-5) are shown in Table 1 below. The parameters of each sample in Example 4 (4-1-4-5) are shown in Table 2 below.

[0029]

[0030] Table 1 shows that the average density of the board material produced in Example 2 is 1.176 g / cm³. 3 The maximum difference was only 0.008 g / cm³. 3 Table 1 shows that the average density of the board material produced in Example 3 is 1.413 g / cm³. 3 The maximum difference was only 0.028 g / cm³. 3 Table 2 shows that the average density of the board material produced in Example 4 is 1.909 g / cm³. 3 The maximum difference was only 0.012 g / cm³. 3 .

[0031] Therefore, it can be concluded that the felt materials produced in Examples 2, 3, and 4 have good homogeneity. The uniformity of the fiber felt material obtained by this invention is significantly better than that of materials obtained by existing technologies;

[0032]

[0033] Similarly, thermogravimetric analysis can be used to analyze the homogeneity of fiber felt materials. Since the thermal decomposition temperature of thermoplastic composite sheets mainly depends on the resin content, when the sample volume is constant, the total fiber and resin content is determined, and the thermal decomposition temperature depends on the resin content. Therefore, by calculating the mass of the remaining decomposition products and comparing it with the design ratio, the homogeneity of the fiber mixture can be determined. Test results show that all 10 samples of fiber felt material 1 in Example 2 and fiber felt material 2 in Example 3 decomposed at 445℃. After the test, their weight losses were 79.95% and 79.97%, respectively, which basically conforms to the 1:4 ratio of carbon fiber to PA-66 fiber and the 1:1:8 ratio of carbon fiber: basalt fiber: PA-66. Furthermore, thermogravimetric testing of fiber felt material 3 in Example 4 showed that the material decomposed at 378℃, and its weight loss was 79.97%. This indicates that the glass fiber: basalt fiber: D-99 epoxy resin was blended at a mass ratio of 1:1:8. Thermogravimetric analysis (TGA) showed that the remaining mass after high-temperature decomposition was consistent with the designed proportions of each component in the composite material, indicating that the fiber felt was uniformly mixed. Furthermore, the felt obtained by the method described in the above embodiments exhibited uniform mixing, undamaged mechanical properties, no impurities, no solvent residue, high-temperature resistance, strong thermal stability, and no broken fibers.

[0034] In summary, as can be seen from all embodiments of this invention, the process parameters used in this invention vary depending on the raw materials to be processed, resulting in different properties of the final felt material. Compared with existing technologies, this invention omits the addition of organic solvents and complex processes. The felt material obtained by this invention is uniformly mixed, has no damage to mechanical properties, is free of impurities and solvent residues, is resistant to high temperatures, has strong thermal stability, is highly efficient, and does not break fibers. Furthermore, the obtained felt material is more uniformly dispersed than that of existing technologies, breaking through the technical bottleneck of simultaneously achieving uniform blending of multiple fibers with different densities to produce felt. This invention achieves the felt material obtained by existing technologies while also solving the problems of existing technologies. The invention achieves excellent uniform dispersion of felt materials that are technically impossible to prepare, even for fibers with significant density differences. In summary, the superior performance of this invention is not determined by a single component or parameter. It requires the coordinated control of multiple processes and parameters, such as the direction of high-pressure airflow, the direction of non-directional turbulence, the flow rate, the length of the long and short arms, and the deflection angle of the baffle, according to the composition, properties, and proportions of the material to be processed. In other words, the optimal felt material preparation can only be achieved through the coordinated control of the high-pressure airflow high-performance composite fiber felt material forming device and process parameters.

Claims

1. High-pressure air flow preparation of high-performance composite fiber felt forming device, including external frame (1), transverse frame mechanism (2), longitudinal frame mechanism (3), fiber transmission mechanism (4), air flow generation mechanism (5), mixing box (6), air duct mechanism (7), The transverse frame mechanism (2) is arranged at the bottom of the inside of the external frame (1), used for fixing the air flow generation mechanism (5), the longitudinal frame mechanism (3) is longitudinally fixed to the inside of the external frame (1), used for connecting the mixing box (6), so that the mixing box (6) can be mechanically moved along the longitudinal direction of the external frame (1), The air flow generation mechanism (5) is fixed above the transverse frame mechanism (2), the mixing box (6) is installed above the air flow generation mechanism (5), inside the external frame (1), and is fixed to the longitudinal frame mechanism (3), so that the mixing box (6) can be mechanically moved along the longitudinal direction of the external frame (1), The air duct mechanism (7) is located in the lower region inside the mixing box (6) and is fixed to the inner wall of the mixing box (6), used for limiting the displacement of the mixing box (6) caused by air flow, The fiber transmission mechanism (4) is located above the side of the mixing box (6) and is fixed to the side of the mixing box (6), so that the cut material falls into the mixing box (6), The fiber transmission mechanism (4) includes a fiber guide chute (4-1), a fiber positioning roller (4-2), a fiber transmission roller (4-3), and a fiber rotary cutting device (4-4), The fiber transmission mechanism (4) is connected with the mixing box (6) and makes the processed material directional movement through the fiber guide chute (4-1), avoids the processed material extruding outward when the subsequent fiber transmission roller (4-3) transmits pressure, and further avoids the fiber rotary cutting device (4-4) from working effectively due to the fiber width exceeding the working width, The working width of the fiber rotary cutting device (4-4) is determined by the width of the fiber guide chute (4-1), one fiber positioning roller (4-2) and one fiber transmission roller (4-3) are set as a group, a total of 3 groups, each group is arranged on the fiber guide chute (4-1) in an alternating interval manner, and the processed material width and speed are stabilized by fixing and tensioning the processed material under the joint action of the fiber positioning roller (4-2) and the fiber transmission roller (4-3); The air flow generation mechanism (5) includes a fan (5-1) and a fixed base (5-2), which provides a source of wind power for the whole device and can adjust the air flow intensity; The mixing box (6) is used for mixing the processed material, which is a hollow rectangular box composed of a closed four sides and a top and bottom sieve plate with adjustable hole size, the sieve plate can make the air flow, and the mixing box (6) can limit the distribution space of the processed material; The air duct mechanism (7) includes a connecting mechanism (7-1), a spoiler (7-2), and a follow-up deflection mechanism (7-3).The connecting mechanism (7-1) is composed of a short connecting arm (7-4), a long connecting arm (7-5) and a fixed shaft (7-6) for connecting the two connecting arms, the short connecting arm (7-4) is used to connect the follow-up deflection mechanism (7-3), the long connecting arm (7-5) is used to connect the mixing box (6); the connecting mechanism (7-1) realizes the coordinated movement of the follow-up deflection mechanism (7-3) and the mixing box (6) through the movement of the long connecting arm (7-5) and the short connecting arm (7-4), the follow-up deflection mechanism (7-3) is composed of a frame (7-7) and a rotating shaft (7-8); the rotating shaft (7-8) can only rotate axially, the spoiler (7-2) is fixed on the frame (7-7), the frame (7-7) is fixed on the inner wall of the mixing box (6), the spoiler (7-2) generates a speed difference in the airflow flowing out of the fan (5-1), thereby forming asymmetric airflow, and finally changing into non-directional turbulence for dispersing the material to be processed, and the degree of turbulence is changed by changing the included angle between the axis of the spoiler (7-2) and the flow direction of the high-pressure airflow generated by the fan (5-1), one end of the short connecting arm (7-4) is connected with the rotating shaft (7-8); the length of the long connecting arm (7-5) and the short connecting arm (7-4) is adjusted according to the material to be processed, when the mixing box (6) moves longitudinally, the long connecting arm (7-5) moves up and down, and due to the action of the fixed shaft (7-6), the short connecting arm (7-4) also moves, realizing the deflection of the spoiler (7-2) with the movement of the mixing box (6), under the movement of the long connecting arm (7-5) and the short connecting arm (7-4), the short connecting arm (7-4) drives the rotating shaft (7-8) to rotate, and the follow-up deflection mechanism (7-3) drives the spoiler (7-2) to deflect, wherein, The deflection angle of the spoiler (7-2) is regulated by the connecting mechanism (7-1) to realize the adjustable and controllable air volume, air speed and air direction in the mixing box (6).

2. The method of using the high-pressure airflow preparation high-performance composite fiber felt forming device according to claim 1, characterized in that, It comprises the following steps: according to the processing requirements, the material to be processed is placed into the fiber transmission cutting mechanism (4) for cutting treatment, and then the processed material is conveyed into the mixing box (6) at a transmission speed of 200-300 cm / min and a rotation speed of 10-400 r / min; then the air is converted into directional high-pressure airflow by the fan (5-1), the rotation speed of the fan (5-1) is 10-2950 r / min, the high-pressure airflow flow is 20-5690 m3 / h, the airflow pressure is 100-8957 Pa, the directional high-pressure airflow is converted into undirectional turbulence after flowing through the spoiler (7-2), the turbulence degree changes with the change of the deflection angle of the spoiler (7-2), the spoiler (7-2) is deflected by the connecting mechanism (7-1), wherein the deflection angle of the spoiler (7-2) refers to the included angle between the axis of the spoiler (7-2) and the flow direction of the high-pressure airflow generated by the fan (5-1), the deflection angle of the spoiler (7-2) ranges from -90° to 90°, the length adjustment range of the short connecting arm (7-4) is 15-45 cm, and the length adjustment range of the long connecting arm (7-5) is 50-100 cm; the undirectional turbulence degree is positively correlated with the deflection angle, and the undirectional turbulence continuously disperses the material to be processed for 5-30 min to obtain uniformly dispersed fibrous felt material.

3. The method of using the high-pressure airflow preparation high-performance composite fiber felt forming device according to claim 2, characterized in that, The material to be processed is one or any combination of carbon fiber, basalt fiber, glass fiber, hemp fiber, aramid fiber, PA-6, PA-66, PP, PE, PLA, PC, PEEK and PI.

4. The method of using the high-pressure airflow preparation high-performance composite fiber felt forming device according to claim 2, characterized in that, The fiber positioning roller (4-2) and the fiber transmission roller (4-3) are cylindrical materials and can rotate; the fan (5-1) can convert air into high-pressure airflow; the fixed base (5-2) has a quick disassembly tenon structure, which facilitates disassembly when replacing or repairing the airflow.

5. The method of using the high-pressure airflow preparation high-performance composite fiber felt forming device according to claim 2, characterized in that, The material of the spoiler (7-2) is one of PC, PVC, PMMA and PP, which has light weight, can improve the sensitivity of the servo deflection mechanism (7-3) and prolong the service life of the servo deflection mechanism (7-3).

Images