Anti-infrared cloth coating spraying composite slurry device

Abstract

The invention discloses an anti-infrared cloth coating spraying composite slurry device which comprises a rack, a spraying mechanism is assembled and connected to the rack, and the spraying mechanism comprises a plurality of spraying pipes and sprayers installed on the spraying pipes; the cloth spreading device further comprises a cloth spreading assembly used for controlling the spreading range of cloth, the cloth spreading assembly comprises a plurality of supporting rods, the two ends of each supporting rod are hinged to turning arms for turning over the supporting rods respectively, and the turning arms are pushed through pushing structures respectively. The machine frame is further provided with a cloth unwinding mechanism and a cloth winding mechanism in an assembled and connected mode, the cloth unwinding mechanism and the cloth winding mechanism respectively slide on the machine frame in a rolling mode, and the cloth unwinding mechanism and the cloth winding mechanism are pushed to move back and forth through a back-and-forth pushing structure to be matched with the spraying mechanism to conduct spraying. According to the technical scheme disclosed by the invention, the MXene composite slurry is more efficiently and uniformly sprayed on the cloth to form a uniform coating.

Description

Technical Field

[0001] This invention belongs to the field of fabric spraying technology, and in particular relates to a device for spraying composite slurry for infrared-proof fabric coating. Background Technology

[0002] The rapid development and widespread application of modern thermal infrared reconnaissance technology and hyperspectral remote sensing technology have severely threatened various military targets, including soldiers, with comprehensive, all-weather, multi-spectral, and high-precision detection capabilities. The quality of concealment capabilities of soldiers, the main force in combat operations, directly affects the success or failure of modern high-tech warfare. Therefore, research on soldier camouflage, especially thermal infrared camouflage textiles, has received high attention from various countries. According to the Stefan-Boltzmann law, the radiation capability of a target is determined by its emissivity and temperature. Therefore, reducing the emissivity of the target surface and controlling its surface temperature are fundamental ways to achieve infrared shielding. The lower the resistivity of a material, the better its conductivity, and the lower its infrared emissivity.

[0003] MXene is a class of two-dimensional materials with excellent properties. Its abundant surface functional groups, high conductivity, excellent mechanical properties, chemical stability, and strong adsorption capacity make it highly effective in electrochemistry, catalysts, sensors, electrothermal applications, biomedicine, optical devices, infrared shielding, electromagnetic shielding, and composite materials. This patented Mxene composite slurry is a composite coating formed from carbon nanotubes, diethylene glycol butyl ether, and resin, which can block the conduction of heat radiation. Therefore, by applying this coating to fabric and finally processing it into special workwear, such as field training uniforms, the coating's ability to block heat radiation helps evade detection by infrared thermal imaging equipment. Thus, the application of Mxene composite slurry to training uniforms helps trainees evade detection by thermoforming reconnaissance equipment.

[0004] The aforementioned Mxene composite paste is applied to the fabric as a coating. Therefore, to ensure its long-term performance (blocking heat radiation), the requirements for the coating processing technology and equipment are very high. Traditional fabric coating processing methods, such as flatbed printing machines, spray the coating onto the fabric. The coating has relatively poor durability, especially after being processed into clothing. After long-term friction and washing, the coating gradually peels off from the fabric, resulting in a reduction in the coating thickness and a significant decrease in its heat radiation blocking performance.

[0005] Spray coating is a process that uses spraying to apply paint onto a substrate to form a coating. It has the advantage of high coating efficiency and is therefore widely used in fabric processing. However, unlike conventional spray coatings, Mxene composite slurry is a high-viscosity coating containing resin and other substances. During the spraying process, using traditional spraying methods not only easily causes the fabric to adhere to the support carrier (in traditional spraying equipment, the fabric passes through a support platform to support the fabric and ensure that the coating adheres firmly to the fabric during the spraying process), but also, with the fabric being transported, the coating sprayed on the fabric is prone to adhering to the support platform, causing pulling and resulting in damage to the fabric coating structure.

[0006] When the fabric is suspended and transported, it loses its support during the spraying process. When the high-pressure nozzle sprays high-pressure liquid, the aerodynamic effect of the fabric can cause it to move in an "avoidance" manner (under the propulsion of spraying and gas), resulting in the paint not being able to adhere firmly to the fabric.

[0007] Meanwhile, during the spraying process, the thickness of the Mxene composite slurry coating has certain requirements, and the uniformity of the spraying is also highly demanding. Traditional spraying equipment obviously cannot meet these specific requirements. Summary of the Invention

[0008] Based on the above background, the purpose of this invention is to provide a device for spraying composite slurry onto infrared-resistant fabric coatings.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: An infrared-resistant fabric coating spraying composite slurry device includes a frame, on which a spraying mechanism is assembled and connected. The spraying mechanism includes a plurality of spray pipes and nozzles installed on the spray pipes. It also includes a fabric spreading assembly for controlling the spread of the fabric, the fabric spreading assembly including several support rods, the two ends of which are respectively hinged to flip arms of the flip support rods, and the flip arms are respectively pushed by a pushing structure; The fabric is inserted between the support rods, and the opening range of the fabric is controlled by controlling the opening range of the adjacent flipping support rods in conjunction with the spraying mechanism for spraying. The frame is also equipped with a fabric unwinding mechanism and a fabric winding mechanism. The fabric unwinding mechanism and the fabric winding mechanism roll and slide on the frame respectively. The fabric unwinding mechanism and the fabric winding mechanism are driven by a reciprocating push structure to move back and forth in coordination with the spraying mechanism for spraying.

[0010] Preferably, the spraying mechanism further includes a first annular tube support and a second annular tube support arranged at intervals on both sides; The two ends of the spray pipe are respectively connected and installed on the first annular pipe support and the second annular pipe support; The second annular tube support is connected to an MXene composite slurry feed pipe.

[0011] Preferably, the spray pipe is circumferentially arranged between the first annular pipe support and the second annular pipe support; The support rod is circumferentially arranged on the outside of the spray pipe.

[0012] Preferably, the lower end of the tilting arm is hinged to the corresponding first annular tube support and the second annular tube support by means of a pin. The pushing structure includes an electric push rod that is respectively hinged to the first annular tube support and the second annular tube support; The pushing end of the electric push rod is hinged to the center of the tilting arm via a pin.

[0013] Preferably, protrusions are welded to the side walls on both sides of the first annular tube support and the second annular tube support, respectively. Assembly screws are fixedly installed on the protrusions, and bases are fixedly installed on the bottom of the assembly screws. The bases are fixedly assembled on the frame.

[0014] Preferably, a spray hood for the spraying mechanism is installed on the top of the frame; The top of the spray hood is connected to an exhaust pipe, which is connected to an external exhaust device.

[0015] Preferably, both the fabric unwinding mechanism and the fabric winding mechanism include a roll shaft, with bearing brackets rotatably connected to both ends of the roll shaft, and a fixed base fixedly installed at the bottom of the bearing brackets. A drive motor is fixedly installed on one side of the roll shaft, and a fixed base is fixedly installed on the reciprocating push structure.

[0016] Preferably, the reciprocating pushing structure includes a sliding steel frame with a fixed base, and several rollers that limit the rolling motion on the frame are rotatably connected to both sides of the lower end of the sliding steel frame. The reciprocating propulsion structure also includes an eccentric wheel propulsion structure installed on one side of the sliding steel frame, and a spring return structure installed on the other side of the sliding steel frame.

[0017] Preferably, the eccentric wheel driving structure includes a driving arm hinged to a sliding steel frame, and a motor, wherein the output shaft of the motor is fixedly mounted with an eccentric wheel, and the eccentric position of the eccentric wheel is hinged to the driving arm.

[0018] Preferably, the spring reset structure includes guide rails fixedly connected to both sides of the end of the sliding steel frame, and a spring is sleeved on the guide rails; The frame is welded with a steel frame that has sliding connecting guide rails; A spring seat is fixedly connected to the guide rail rod. One end of the spring is fixedly connected to the spring seat, and the other end of the spring is fixedly connected to the steel frame.

[0019] The present invention has the following beneficial effects: 1. The present invention improves a support structure for supporting and guiding fabric. During the spraying process, the fabric is guided from a conventional horizontal position to a cage-like structure. Since the spraying structure, such as the nozzle and spray pipe, is covered inside the cage-like fabric, a relatively closed fabric environment is formed during the spraying process.

[0020] The advantages of this ingenious design are: it prevents a large amount of sprayed material from escaping from the workshop, while the relatively enclosed fabric environment ensures uniform spraying and improves the spraying effect. Traditional spraying methods, due to the horizontal transport of the fabric, not only suffer from the technical problems mentioned in the background, but also result in significant paint escaping (MXene composite slurry is expensive). Therefore, by guiding the fabric into a cage-like structure, it not only supports and tensions the fabric, ensuring the paint adheres tightly to the fabric during spraying and improving adhesion stability, but also increases the stability of the coating's radiation-blocking performance and its long-term reliability after subsequent garment processing.

[0021] 2. The fabric opening assembly forms a fabric cage structure while simultaneously controlling the fabric's opening amplitude. This assembly comprises four support rods (circumferentially arranged outside the spray pipes, serving as both a support structure for the fabric and the skeleton of the fabric cage). Each support rod has a hinged arm at both ends, which is pushed by a mechanism. The fabric passes between the support rods, and the opening amplitude of the fabric is controlled by adjusting the opening amplitude of adjacent hinged support rods to coordinate with the spraying mechanism.

[0022] During the spraying process, the fabric is supported between the struts to form a fabric cage that covers the spraying structure. Therefore, the thickness of the sprayed coating can be controlled by changing the size of the fabric cage during the spraying process.

[0023] For example, during the processing, when a large coating thickness is required, the size of the cloth cage (the size of the cage cavity) is reduced, and the total length of the cloth in the cloth cage (the spraying length) is adjusted and reduced accordingly. After the length is reduced, the amount of coating that the nozzle sprays onto the cloth per unit time is greater, and the coating thickness is higher. Conversely, the length is reduced.

[0024] 3. It achieves a very ingenious way to form a cage structure for spraying fabric, which not only has high spraying efficiency, high uniformity, and uniform coating thickness distribution, but also allows the fabric to be sprayed in a supported or suspended state. What is even better is that the size of the cage structure formed by the fabric can be adjusted, thereby adjusting the thickness of the sprayed coating and the spraying efficiency.

[0025] 4. By cleverly designing the fabric unwinding and rewinding mechanism into a reciprocating motion, the fabric is transported back and forth during the spraying process. The fabric follows this reciprocating motion, sliding relative to the support rods. Under this mechanism, the nozzle moves relative to the width of the fabric during the initial spraying process, thus achieving even coating. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present 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 present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the spraying mechanism in an embodiment of the present invention; Figure 3 This is one of the structural schematic diagrams of the reciprocating propulsion structure in an embodiment of the present invention; Figure 4 This is a second schematic diagram of the reciprocating propulsion structure in an embodiment of the present invention; Figure 5 This is a schematic diagram of the fabric spreading component in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure through which the fabric cage is guided by the fabric spreading component in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the spray pipe with the nozzle installed in an embodiment of the present invention; Figure 8 This is an embodiment of the present invention. Figure 2 Top view in the middle; Figure 9 This is an embodiment of the present invention. Figure 2 The right view in the middle; Figure 10 This is a schematic diagram illustrating the principle structure of the fabric spreading component for adjusting the size of the fabric cage in an embodiment of the present invention. Figure 11 This is a diagram showing the infrared shielding test results in an embodiment of the present invention.

[0028] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0031] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0032] Example 1 like Figure 1-10 As shown, an infrared-resistant fabric coating spraying composite slurry device includes a frame 1. A spraying mechanism 5 is mounted and connected at the center of the frame 1. The spraying mechanism 5 includes four circumferentially arranged spray pipes 53 and each spray pipe 53 is equipped with a plurality of nozzles 531. Specifically, the spraying direction of the nozzles 531 is outward and they are vertically installed on the spray pipes 53. Therefore, in terms of spatial position, the nozzles 531 can spray in four directions: up, down, left, and right.

[0033] Specifically, the spraying mechanism 5 also includes a first annular pipe support 51 and a second annular pipe support 52 spaced apart on the front and rear sides; the first annular pipe support 51 and the second annular pipe support 52 are thickened annular pipes made of stainless steel and have a flat structure.

[0034] According to the existing pipeline connection and installation method, the two ends of the spray pipe 53 are respectively connected to the first annular pipe support 51 and the second annular pipe support 52. At the same time, the MXene composite slurry inlet pipe 551 is connected to the second annular pipe support 52 (the composite slurry inlet pipe 551 is connected to the external feeding system through the flange structure 551). During operation, the MXene composite slurry is pre-mixed in the material tank, pumped into the MXene composite slurry inlet pipe by means of a material pump, and finally sprayed out from each nozzle 531.

[0035] The fixing and installation methods for the first annular pipe support 51 and the second annular pipe support 52 are as follows: A boss is welded to the side wall of the first annular tube support 51 and the second annular tube support 52 respectively. An assembly screw is fixedly installed on the boss, and a base is fixedly installed on the bottom of the assembly screw. The base is fixedly mounted on the frame 1.

[0036] Since the nozzle 531 can spray in four directions (up, down, left, and right) in terms of spatial position, the present invention improves a support structure that supports and guides the fabric. During the spraying process, the fabric is guided from a conventional horizontal position to a cage-like structure. Since the spraying structure, such as the nozzle 531 and the spray pipe 53, is covered inside the cage-like fabric, a relatively closed fabric environment is formed during the spraying process.

[0037] The advantages of this ingenious design are: it prevents a large amount of sprayed material from escaping from the workshop, while the relatively enclosed fabric environment ensures uniform spraying and improves the spraying effect. Traditional spraying methods, due to the horizontal transport of the fabric, not only suffer from the technical problems mentioned in the background, but also result in significant paint escaping (MXene composite slurry is expensive). Therefore, by guiding the fabric into a cage-like structure, it not only supports and tensions the fabric, ensuring the paint adheres tightly to the fabric during spraying and improving adhesion stability, but also increases the stability of the coating's radiation-blocking performance and its long-term reliability after subsequent garment processing.

[0038] Example 2 like Figure 1-10 As shown, based on the structure of Example 1, this embodiment achieves the cage-like structure during the fabric spraying process in the following way: It also includes a fabric spreading assembly 54 for controlling the fabric spreading range. The fabric spreading assembly 54 includes several support rods 541 (four rods, circumferentially arranged on the outside of the spray pipe, serving as a support structure for the fabric and also as the skeleton of the fabric cage). Each end of the support rod 541 is hinged to a flipping arm 542 of the flipping support rod 541, which is pushed by a pushing structure. The fabric passes through the support rods 541, and the fabric spreading range is controlled by controlling the flipping range of adjacent flipping support rods 541 to coordinate with the spraying mechanism 5 for spraying.

[0039] During the spraying process, the cloth support forms a cloth cage 6 between the struts 541 and covers the spraying structure. Therefore, the thickness of the sprayed coating can be controlled by changing the size of the cloth cage 6 during the spraying process.

[0040] If a large coating thickness is required during the processing, the size of the cloth cage 6 (the size of the cage cavity) is reduced, and the total length of the cloth (spraying length) of the cloth cage 6 is adjusted and reduced accordingly. After the reduction, the nozzle 531 sprays more coating material onto the cloth per unit time, and the coating thickness is higher. Conversely, the size is reduced.

[0041] Example 3 like Figure 1-10 As shown, in this embodiment, based on the structure of embodiment 2, the lower end of the aforementioned tilting arm 542 is respectively hinged to the corresponding first annular tube support 51 and second annular tube support 52 via pins; the pushing structure includes electric push rods 543 respectively hinged to the first annular tube support 51 and the second annular tube support 52 (which are conventional electric telescopic rods disclosed in the prior art, with the electric push rods driven at both ends of the support rod working synchronously, and the principle of synchronous operation being a conventional method disclosed in the prior art, such as the two electric telescopic rods being electrically connected in a synchronous series manner, controlled by a switch on the series branch, and the electrical working principle process of all electric push rods being a conventional principle method disclosed in the prior art).

[0042] The pushing end of the electric push rod 543 is hinged to the center of the tilting arm 542 via a pin (specifically, the pushing end of the electric push rod 543 is fixedly connected to a hinge sleeve, which is hinged to a pin on the fixed tilting arm 542). The bottom of the electric push rod 543 is fixedly connected to an ear seat, which is also hinged to the corresponding first annular tube support 51 and second annular tube support 52 via a pin.

[0043] During operation, when it is necessary to reduce the size of the fabric cage 6, the electric push rod 543 flips the upper left arm 542 (with the support rod 541 in sync) downwards, and the electric push rod 543 pushes the connected flip arm 542 (with the support rod 541 in sync) upwards. Accordingly, the upper and lower support rods 541 on the left move closer together. Similarly, the pair of support rods 541 on the right move closer together to the pair of support rods 541 on the left to reduce the size of the fabric cage 6.

[0044] Conversely, when the coating thickness requirement is lower, the pair of support rods 541 on the left side are rotated away from each other, and the pair of support rods 541 on the right side are also moved away from each other, and the two are further apart. This method increases the size of the fabric cage 6.

[0045] With the increase in the size of the fabric cage 6, the total length of spraying per unit time increases, while the amount of coating sprayed decreases (thickness decreases), making it suitable for producing coated fabrics with ordinary thickness requirements.

[0046] The above structure achieves a very ingenious way to form a cage structure for spraying the fabric. It not only has high spraying efficiency, high uniformity, and uniform coating thickness distribution, but also allows the fabric to be sprayed in a supported and suspended state. Even better, the size of the cage structure formed by the fabric can be adjusted, thereby adjusting the thickness of the sprayed coating and the spraying efficiency.

[0047] Example 4 like Figure 1-10 As shown, in this embodiment, based on the structure of embodiment 3, the top two sides of the frame 1 are also equipped with a fabric unwinding mechanism 3 and a fabric winding mechanism 4, and the spraying mechanism 5 is located between the fabric unwinding mechanism 3 and the fabric winding mechanism 4.

[0048] The fabric unwinding mechanism 3 and the fabric winding mechanism 4 roll and slide on the frame 1 respectively. The fabric unwinding mechanism 3 and the fabric winding mechanism 4 are driven by a reciprocating push structure to move back and forth in coordination with the spraying mechanism 5 for spraying.

[0049] The advantages of the above structural design are as follows: During the spraying process, the fabric is transported by a reciprocating fabric transfer structure, allowing the fabric to follow the reciprocating movement, and during this reciprocating movement, the fabric slides relative to the support rod 541. Under this mechanism, during the initial spraying process, the nozzle 531 moves relative to the width of the fabric, thereby achieving further uniform spraying.

[0050] Traditional methods involve mounting the spray head 531 on a structure such as a lead screw for propulsion. This method is only suitable for a single spraying structure. However, this invention is based on production line considerations, where the length of the spraying and spraying pipes matches the width of the fabric. The entire spraying structure is heavy and cannot be moved. Therefore, by reciprocating the fabric and the mechanical structure for unwinding and rewinding the fabric, the invention achieves autonomous movement of the fabric, effectively solving this technical problem.

[0051] Similar to existing fabric unwinding and rewinding structures, both the fabric unwinding mechanism 3 and the fabric rewinding mechanism 4 include a roll shaft 44. Bearing brackets 43 are rotatably connected to both ends of the roll shaft 44, and a fixed base is fixedly installed at the bottom of the bearing brackets 43. A drive motor 45 is also fixedly installed on one side of the roll shaft 44.

[0052] Example 5 like Figure 1-10 As shown, this embodiment, based on the structure of embodiment 4, discloses the specific structure of the reciprocating propulsion structure, as follows: The reciprocating push structure includes a sliding steel frame 41 with a fixed base, and several rollers 42 that limit the rolling and sliding on the frame 1 are rotatably connected to the lower ends of the sliding steel frame 41. Correspondingly, the frame 1 has matching roller grooves, and the rollers 42 roll in the roller grooves.

[0053] The reciprocating push structure also includes an eccentric wheel push structure 46 installed on the front sliding steel frame 41, and a spring return structure 14 installed on the rear sliding steel frame 41.

[0054] The eccentric wheel drive structure 46 includes a push arm 463 hinged to a sliding steel frame 41, and a motor 461 (motor 461 is fixedly mounted on the top of the frame 1). An eccentric wheel 462 is fixedly mounted on the output shaft of the motor 461, and the eccentric position of the eccentric wheel 462 is hinged to the push arm 463.

[0055] The spring reset structure 47 is used to assist in the reset of the fabric unwinding mechanism 3 and the fabric winding mechanism 4 after being pushed by the eccentric wheel 462. Specifically, the spring reset structure 47 includes guide rail rods 471 fixedly connected to both sides of the end of the sliding steel frame 41, and springs 472 are sleeved on the guide rail rods 471; at the same time, spring seats 472 are fixedly connected to the guide rail rods 471, and one end of the spring 472 is fixedly connected to the spring seat.

[0056] Meanwhile, a steel frame 473 with a sliding connecting guide rail 471 is welded onto the frame 1; the other end of the spring 472 is fixedly connected to the steel frame 473.

[0057] During operation, driven by the eccentric wheel 462, the entire sliding steel frame 41, along with the fabric unwinding mechanism 3 and fabric winding mechanism 4 mounted on top of the sliding steel frame 41, reciprocate horizontally. As the fabric unwinding mechanism 3 and fabric winding mechanism 4 are pushed to the rear, the spring 472 is compressed, and the rotation of the eccentric wheel 462 pulls the fabric unwinding mechanism 3 and fabric winding mechanism 4 forward. The forward movement is facilitated by the restoring force of the spring 472. This structure enables the fabric to reciprocate relative to the frame 1 during fabric transfer. Since the fabric is guided through the support rod 541, it moves back and forth relative to the smooth support rod 541, further improving the uniformity of the sprayed coating.

[0058] Example 6 like Figure 1-10As shown, in this embodiment, based on the structure of embodiment 5, to further reduce paint evaporation during the spraying process, a spraying hood 2 covering the spraying mechanism 5 is installed on the top of the frame 1 (the left and right sides of the spraying hood have inlets and outlets respectively for the passage of the material). Simultaneously, an external feed pipe for pumping MXene composite slurry passes through the rear wall of the spraying hood 2 and connects to the MXene composite slurry feed pipe.

[0059] The top of the aforementioned spray hood is connected to an exhaust pipe 21 (spring pipe), which, in the existing manner, is connected to an external exhaust device.

[0060] Example 7 like Figure 1-10 As shown, in this embodiment, based on the structure of implementation 7, the existing coating drying method is followed, and the drying equipment used on the existing fabric spraying production line (not shown in the figure) is installed on the top of the frame 1. The drying equipment mainly includes a drying chamber (a rectangular box that enters from the left inlet and exits from the right outlet). After the fabric is discharged from the spraying mechanism 5, it is dried in the drying chamber and then rolled up onto the winding mechanism.

[0061] Example 8 like Figure 1-10 As shown in the figure, this embodiment specifically discloses the process of applying MXene composite slurry to fabric spraying.

[0062] The spraying process of MXene composite paste for fabric includes the following steps: (1) Preparation of carbon nanotube slurry: Carbon nanotubes and diethylene glycol butyl ether were mixed at a ratio of 1:2.2 and stirred in a mixer at a speed of 3500 r / min for 1 hour. The mixture was mixed with resin (aqueous acrylic emulsion) at a ratio of 6:1, and the stirring speed was adjusted to 700 r / min for 0.5 hours to obtain carbon nanotube slurry.

[0063] (2) Fabric finishing process: Alkali washing: Heat 6 g / L soda ash (Na2CO3) + 15 g / L NaOH in a 75°C water bath for 30 min, then rinse with water to neutralize, and then dry in an oven at 65°C. Plasma treatment (aging time 24 hours).

[0064] (3) Preparation of MXene slurry Through comprehensive experiments, in order to ensure the operability and efficiency of mass production, the MXene spraying process for small samples was replaced with coating finishing in the actual production process to prepare MXene slurry.

[0065] Preparation process: Mix MXene with water to prepare a solution, wherein the thickener is 2% (viscosity value 6000 mPa·s) and the binder is 15%.

[0066] (4) Coating process The prepared MXene composite slurry is sprayed onto the fabric using the spraying device disclosed in this invention. After spraying, the fabric is dried (baking temperature 170°C) and then wound up by a winding mechanism.

[0067] Infrared shielding test: The coated fabric was placed on the arm, and its surface temperature was measured using an infrared camera. The arm's surface temperature was 32°C. The test results are as follows: Figure 11 As shown in the figure. Cursor 1 represents the surface temperature of the coated fabric, and cursor 2 represents the surface temperature of the uncoated fabric. The results show that cursor 1 is 20.8℃; cursor 2 is 27.8℃.

[0068] Functional index measurement: The infrared emissivity of the fabric treated above was verified after five washes using the HB20540-2018 standard. The results are shown in Table 4 below. Table 4 The results show that the emissivity of the carbon nanotube / MXene composite infrared shielding fabric prepared by this production process is 0.21 in the 3-5μm band and 0.16 in the 8-14μm band after washing, and its infrared shielding performance is better than the current international advanced level.

[0069] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A device for spraying composite slurry onto infrared-resistant fabric coating, characterized in that, It includes a frame, on which a spraying mechanism is mounted and connected, the spraying mechanism including a plurality of spray pipes and nozzles mounted on the spray pipes; It also includes a fabric spreading assembly for controlling the spread of the fabric, the fabric spreading assembly including several support rods, the two ends of which are respectively hinged to flip arms of the flip support rods, and the flip arms are respectively pushed by a pushing structure; The fabric is inserted between the support rods, and the opening range of the fabric is controlled by controlling the opening range of the adjacent flipping support rods in conjunction with the spraying mechanism for spraying. The frame is also equipped with a fabric unwinding mechanism and a fabric winding mechanism. The fabric unwinding mechanism and the fabric winding mechanism roll and slide on the frame respectively. The fabric unwinding mechanism and the fabric winding mechanism are driven by a reciprocating push structure to move back and forth in coordination with the spraying mechanism for spraying.

2. The infrared-resistant fabric coating spraying composite slurry device according to claim 1, characterized in that, The spraying mechanism also includes a first annular tube support and a second annular tube support arranged at intervals on both sides. The two ends of the spray pipe are respectively connected and installed on the first annular pipe support and the second annular pipe support; The second annular tube support is connected to an MXene composite slurry feed pipe.

3. The infrared-resistant fabric coating spraying composite slurry device according to claim 2, characterized in that, The spray pipe is circumferentially arranged between the first annular pipe support and the second annular pipe support. The support rod is circumferentially arranged on the outside of the spray pipe.

4. The infrared-resistant fabric coating spraying composite slurry device according to claim 3, characterized in that, The lower ends of the tilting arm are respectively hinged to the corresponding first annular tube support and the second annular tube support by pins. The pushing structure includes an electric push rod that is respectively hinged to the first annular tube support and the second annular tube support; The pushing end of the electric push rod is hinged to the center of the tilting arm via a pin.

5. The infrared-resistant fabric coating spraying composite slurry device according to claim 3, characterized in that, The first and second annular tube supports are respectively welded with protrusions on their side walls. The protrusions are fixedly mounted with assembly screws, and the bottom of the assembly screws is fixedly mounted with a base, which is fixedly mounted on the frame.

6. The infrared-resistant fabric coating spraying composite slurry device according to claim 1, characterized in that, The top of the frame is equipped with a spray hood for the spraying mechanism; The top of the spray hood is connected to an exhaust pipe, which is connected to an external exhaust device.

7. The infrared-resistant fabric coating spraying composite slurry device according to claim 1, characterized in that, Both the fabric unwinding mechanism and the fabric winding mechanism include a roll shaft, with bearing brackets rotatably connected to both ends of the roll shaft, and a fixed base fixedly installed at the bottom of the bearing brackets. A drive motor is fixedly installed on one side of the roll shaft, and a fixed base is fixedly installed on the reciprocating push structure.

8. The infrared-resistant fabric coating spraying composite slurry device according to claim 7, characterized in that, The reciprocating push structure includes a sliding steel frame with a fixed base, and several rollers that limit the rolling motion on the frame are rotatably connected to the lower ends of the sliding steel frame. The reciprocating propulsion structure also includes an eccentric wheel propulsion structure installed on one side of the sliding steel frame, and a spring return structure installed on the other side of the sliding steel frame.

9. The infrared-resistant fabric coating spraying composite slurry device according to claim 8, characterized in that, The eccentric wheel drive structure includes a drive arm hinged to a sliding steel frame, and a motor. The output shaft of the motor is fixedly mounted with an eccentric wheel, and the eccentric position of the eccentric wheel is hinged to the drive arm.

10. The infrared-resistant fabric coating spraying composite slurry device according to claim 8, characterized in that, The spring reset structure includes guide rails fixedly connected to both sides of the end of the sliding steel frame, and springs are sleeved on the guide rails; The frame is welded with a steel frame that has sliding connecting guide rails; A spring seat is fixedly connected to the guide rail rod. One end of the spring is fixedly connected to the spring seat, and the other end of the spring is fixedly connected to the steel frame.

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