Coating spraying process and spraying equipment for waterproof cloth

Abstract

The invention belongs to the technical field of spraying, and relates to a coating spraying process and spraying equipment for waterproof cloth. The equipment comprises a storage box, a flow guide plate, a baffle plate, a supporting assembly, a guide roller I, a spraying mechanism, a drying box and a cleaning mechanism. According to the spraying mechanism, continuous suction and spraying of paint are achieved through reciprocating motion of a piston pipe and a piston block, a spray head is obliquely arranged and rotates along with paint pressure, and the spraying range is enlarged; a containing cavity is formed by the guide plate and the baffle plate and is matched with the backflow opening to realize cyclic utilization of the coating; hot air of the drying box is introduced into the fixed base plate through the suction fan and discharged through the air holes to form a protective air curtain, and coating escape is reduced; and the cleaning mechanism drives a knocking strip to periodically shake off redundant paint through a cam. The process comprises the steps of cloth guiding, rotary spraying, air curtain protection, shake-off cleaning and synchronous drying. The problems that existing equipment is uneven in spraying, paint is wasted and the environment is polluted are solved, and the coating uniformity, the paint utilization rate and the production cleanliness are improved.

Description

Technical Field

[0001] This invention belongs to the field of spraying technology and relates to a coating spraying process and spraying equipment for waterproof fabric. Background Technology

[0002] In the field of waterproof fabric production, coating spraying is a key process that gives the fabric its waterproof properties. The quality and performance of coating spraying equipment directly affect the quality and production efficiency of waterproof fabric. Currently, waterproof fabric coating spraying equipment on the market has many problems in practical applications and is difficult to meet the growing production demand.

[0003] Existing equipment uses a relatively simple spraying method, typically employing fixed nozzles. This limits the spraying area, making it difficult to cover the entire surface of the fabric and easily resulting in spraying dead zones. Furthermore, the uniformity of the spraying is difficult to control, leading to inconsistent coating thickness, which affects the waterproofing effect. In addition, the coating application is unstable, sometimes resulting in excessive supply and waste, and sometimes insufficient supply and uneven spraying, seriously affecting the quality and consistency of the coating.

[0004] Therefore, we propose a coating spraying process and equipment for waterproof fabrics to solve the problems mentioned above. Summary of the Invention

[0005] In view of this, in order to solve the above problems, the present invention provides a coating spraying process and spraying equipment for waterproof fabrics.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coating spraying process for waterproof fabric, comprising: S1. The fabric is guided by the support assembly and guide roller I to form a path with a height difference; S2. During the process of the drive motor driving the piston block to move, the paint in the holding chamber is sucked into the piston tube and sprayed onto the fabric through the rotating nozzle. At the same time, the driving motor drives the striking strip to periodically strike the fabric to shake off excess paint. S3. Use a drying oven to dry the sprayed fabric, and at the same time use a suction fan to introduce the hot air in the drying oven into the fixed substrate, and discharge it through the air hole to form a protective air curtain. S4. The guide plate guides the shaken-off paint back into the holding chamber; Spraying, air curtain protection, cleaning, and drying are carried out simultaneously to ensure uniform coating and reduce paint escape.

[0007] A coating spraying device for waterproof fabric, used to achieve the above-mentioned process, includes: Storage bins; A flow guide plate is fixedly installed inside the storage box and is set at an angle; A baffle plate is fixedly installed inside the storage box and located above the guide plate. A backflow opening is formed between the baffle plate and the guide plate. The storage box, the guide plate, and the baffle plate together form a holding cavity. Three sets of support components are fixedly installed on the top of the storage box; Two sets of guide rollers I are rotatably mounted inside the storage bin; Two sets of spraying mechanisms are set in the storage box and located between the two sets of guide rollers I. Each set of spraying mechanisms includes two fixed base plates located on the upper and lower sides of the fabric respectively. A drying oven is disposed between two adjacent support components; The fixed base plate has a hollow structure. A suction fan is provided on one side of the storage box. The air inlet of the suction fan is connected to the drying box, and the air outlet is connected to the fixed base plate. Multiple air holes are opened at the bottom of the fixed base plate. A cleaning mechanism is installed on the storage bin and is linked to the drive assembly; The guide roller I and the support assembly create a path with varying heights for the fabric, and the hot air discharged from the vents forms a protective air curtain surrounding the spraying area.

[0008] As a further improvement to the above technical solution: The spraying mechanism further includes a spraying assembly, which includes: Multiple piston tubes are mounted on a fixed base plate. A sliding rod is slidably mounted through each piston tube. A piston block is fixedly sleeved on the sliding rod. The piston block divides the piston tube into two cavities. The piston tube is connected to two connecting pipes II and III and connecting pipe IV. The connecting pipe II extends to the holding cavity through the connecting pipe I. The bottom ends of the connecting pipes III and IV are rotatably provided with connectors with nozzles. The drive assembly includes two rotating seats fixed to the side wall of the storage box, a reciprocating screw rotatably disposed between the rotating seats, a sliding block slidably sleeved on the reciprocating screw, and a motor driving the reciprocating screw; The sliding rod is connected to the sliding groove via a sliding plate, and the sliding plate on the same side is fixed to the sliding block via a connecting bracket.

[0009] The cleaning mechanism includes: A rotating shaft is rotatably mounted on the side wall of the storage bin. Multiple cams are fixedly sleeved on the rotating shaft; A fixing rod is fixedly installed inside the storage box; A rotating ring is rotatably sleeved on the fixed rod and corresponds to the cam; The striking bar is fixed to the outer wall of the rotating ring and its bottom end is located in the rising section of the fabric. When the cam rotates, it pushes the rotating ring to cause the striking bar to periodically strike the fabric.

[0010] Also includes: A rack is slidably disposed on the side wall of the storage box; A gear is fixedly sleeved on the rotating shaft and meshes with the rack; One end of the rack is fixedly connected to the connecting bracket.

[0011] A limiting ring is fixedly provided inside the sliding rod; Each of the connecting pipes II, III, and IV is equipped with a one-way valve.

[0012] The support components include: Two fixed bases are fixedly installed on the top of the storage box; Two guide rollers II are rotatably positioned between the fixed bases.

[0013] The nozzle is tilted relative to the connector; The connector is rotatably mounted at the bottom of the connecting pipe III and connecting pipe IV via a bearing.

[0014] The guide plate is tilted towards the container cavity; The reflux opening connects the holding cavity and the guiding area.

[0015] The pores are distributed in a rectangular array at the bottom of the fixed substrate; The protective air curtain surrounds the spraying area and blocks the diffusion of atomized coating.

[0016] The beneficial effects of this invention are as follows: 1. The coating spraying equipment for waterproof fabric disclosed in this invention features a piston tube and piston block design in the spraying assembly. Through the reciprocating sliding of the piston block within the piston tube, the alternating suction and spraying of material in the two cavities are achieved, ensuring the stability and continuity of the coating spray. This allows the coating to adhere evenly to the fabric surface, avoiding problems such as uneven spraying and missed spraying that may occur in traditional spraying methods. This effectively improves the quality and consistency of the coating. At the same time, multiple tilted nozzles expand the spraying range and further enhance the uniformity of the spraying.

[0017] 2. The coating spraying equipment for waterproof fabric disclosed in this invention, through the holding chamber structure formed by the guide plate and the baffle plate in the storage tank, and the connection design between the connecting pipe II and the holding chamber, enables the coating to flow and circulate rationally within the equipment. The inclined setting of the guide plate and the return opening between the baffle plate and the guide plate guide the coating to flow orderly into the holding chamber, reducing the accumulation and waste of coating in the storage tank. At the same time, the piston pipe draws coating from the holding chamber through the connecting pipe II, realizing precise supply of coating, avoiding overuse and waste of coating, improving the utilization rate of coating, and reducing production costs.

[0018] 3. The waterproof fabric coating spraying equipment disclosed in this invention uses a drying box to dry the sprayed fabric, accelerating the drying and curing of the coating. The fixed substrate is hollow, and hot air from the drying box is introduced into the fixed substrate by a suction fan and discharged from multiple rectangular air holes at the bottom to form an air curtain. The air curtain can form a protective barrier on the surface around the spraying area, preventing the atomized coating from escaping into the surrounding environment, maintaining a clean working environment, reducing coating waste, and also reducing the impact of the coating on the health of the operators.

[0019] 4. The waterproof fabric coating spraying equipment disclosed in this invention uses a rotating shaft to drive a cam to rotate. The cam pushes a rotating ring, causing the striking bar to periodically strike the fabric. This effectively shakes off excess coating from the fabric, preventing excess coating from accumulating on the fabric surface and affecting the coating quality. It can also be used in conjunction with a drive assembly, using the power of the drive assembly to drive the cleaning mechanism. This eliminates the need for an additional power source, simplifies the equipment structure, and reduces equipment costs and energy consumption. At the same time, the design of the bottom end of the striking bar being located in the rising section of the fabric allows the striking force to be applied to the fabric more effectively, improving the cleaning effect.

[0020] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural schematic diagram of a coating spraying device for waterproof fabric according to the present invention; Figure 2 This is a cross-sectional view of the storage box of a coating spraying device for waterproof fabric according to the present invention. Figure 3This is a schematic diagram of the spraying mechanism and cleaning mechanism of a coating spraying device for waterproof fabric according to the present invention; Figure 4 This is a schematic cross-sectional view of the piston tube structure of a coating spraying device for waterproof fabric according to the present invention. Figure 5 This is a schematic diagram of the drive component structure of a coating spraying device for waterproof fabric according to the present invention; Figure 6 This is a schematic diagram of the fixed substrate structure of a coating spraying device for waterproof fabric according to the present invention; Figure 7 This is a schematic diagram of the cleaning mechanism structure of a coating spraying device for waterproof fabric according to the present invention; Figure 8 This is a cross-sectional structural diagram of the connector of a coating spraying device for waterproof fabric according to the present invention.

[0022] Reference numerals: 1. Storage bin; 2. Spraying mechanism; 3. Cleaning mechanism; 4. Support assembly; 5. Drying box; 6. Guide plate; 7. Baffle plate; 8. Holding chamber; 9. Connecting bracket; 10. Sliding block; 11. Reciprocating screw; 12. Rotating seat; 13. Motor; 14. Gear; 15. Rack; 16. Sliding plate; 17. Air hole; 18. Spray head; 19. Slide groove; 20. Guide roller I; 21. Fixed base plate; 22. Piston tube; 23. Connecting tube I; 24. Connector; 25. Piston block; 26. Sliding rod; 27. Limiting ring; 28. Connecting tube II; 29. ​​Connecting tube III; 30. Connecting tube IV; 31. Rotating shaft; 32. Cam; 33. Fixed rod; 34. Striking bar; 35. Rotating ring; 41. Fixed base; 42. Guide roller II. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] Example 1

[0027] A coating spraying process for a waterproof fabric includes the following steps: S1. The fabric is guided by the support assembly 4 and the guide roller I20 to form a path with a height difference; S2. During the process of driving the piston block 25 to move, the paint in the holding chamber 8 is sucked into the piston tube 22 and sprayed onto the fabric through the nozzle 18. At the same time, the striking bar 34 is driven to periodically strike the fabric to shake off excess paint. S3. The sprayed fabric is dried using the drying box 5. At the same time, the hot air in the drying box 5 is introduced into the fixed substrate 21 by the suction fan and discharged through the air hole 17 to form a protective air curtain. S4, the guide plate 6 guides the shaken-down paint back into the holding chamber 8; Spraying, air curtain protection, cleaning, and drying are carried out simultaneously to ensure uniform coating and reduce paint escape.

[0028] Example 2

[0029] like Figures 1-8 As shown, a coating spraying device for waterproof fabric consists of a storage tank 1, a spraying mechanism 2, a drying box 5, a support assembly 4, a cleaning mechanism 3, and other parts.

[0030] The storage tank 1, serving as the main frame of the entire equipment, is made of stainless steel to ensure sufficient strength and corrosion resistance, enabling it to withstand working environments with prolonged contact with coatings. The guide plate 6 fixed inside the storage tank 1 has an inclination angle of 20°, allowing the coating to flow smoothly in a specific direction under gravity, preventing coating accumulation within the storage tank 1. The guide plate 6 is securely fixed to the inner wall of the storage tank 1 by welding.

[0031] The baffle plate 7 is located above the guide plate 6 and is also fixed inside the storage tank 1 by welding. The backflow opening formed between the baffle plate 7 and the guide plate 6 has a width of 5 cm, which can ensure the backflow of paint. The holding cavity 8 formed by the storage tank 1, the guide plate 6, and the baffle plate 7 has a volume that meets the paint requirements of a certain area of ​​spray painting operation, reducing the frequency of paint addition.

[0032] Three sets of support components 4 are evenly distributed on the top of the storage tank 1. Each set of support components 4 has two fixed bases 41 bolted to the top of the storage tank 1. The fixed bases 41 are made of high-strength plastic, reducing the overall weight of the equipment while ensuring sufficient support. Two guide rollers II 42 are mounted on the fixed bases 41 via bearings. High-quality ball bearings are used to ensure flexible rotation of the guide rollers and reduce friction during material transmission. The material passes over the guide rollers II 42 on the three sets of support components 4 in sequence, achieving smooth guiding and transmission. Simultaneously, two sets of guide rollers I 20 are rotatably positioned inside the storage tank 1, located at the front and rear positions of the spraying mechanism 2, respectively. Their installation height is adjusted by the support structure to create a height difference between the spray nozzle area 18 and the drying area, which is beneficial for paint spraying and cleaning.

[0033] Two sets of spraying mechanisms 2 are symmetrically arranged between two sets of guide rollers I 20 inside the storage tank 1. Two fixed base plates 21 of each spraying mechanism 2 are located on the upper and lower surfaces of the fabric, respectively. The fixed base plates 21 are made of aluminum alloy, which is lightweight and corrosion-resistant. The fixed base plates 21 are fixed to the inner wall of the storage tank 1 by bolts. The system also includes a spraying assembly and a drive assembly. The lower spraying mechanism 2 is a detachable module and is only installed during double-sided spraying.

[0034] The coating thickness is 10~50μm, and the spraying speed is 0.5~2m / min.

[0035] In the spraying assembly, at least six piston tubes 22 are evenly arranged on each fixed base plate 21. The piston tubes 22 are made of stainless steel, with an inner diameter of 5-20 cm and a length of 50 cm. A sliding rod 26, with a diameter of 1-5 cm and made of high-strength steel, slides through one side of the piston tube 22. A piston block 25 is fixedly sleeved on the outer wall of the sliding rod 26. The piston block 25 fits tightly with the inner wall of the piston tube 22, allowing for smooth sliding and dividing the piston tube 22 into two cavities.

[0036] Two connecting pipes II28, with an inner diameter of 1 cm, are connected to the outer wall of piston tube 22. One end of each pipe is connected to one of the two cavities, and the other end extends into the holding cavity 8 through connecting pipe I23. Connecting pipe I23 is made of rubber hose, which has a certain degree of flexibility and is easy to install and connect. Connecting pipes III29 and IV30, with an inner diameter of 1 cm, are also connected to the outer wall of piston tube 22 and are connected to the two cavities. Their bottom ends are fixedly connected to the fixed base plate 21 and extend into the fixed base plate 21. Connector 24 rotates at the bottom end of connecting pipes III29 and IV30 via bearings. Six nozzles 18 with an inclination angle of 45° are evenly distributed on connector 24. The nozzles 18 are made of precision ceramic material, which can ensure the uniformity and fineness of the paint spraying. They rotate under the pressure of paint spraying at a rotation speed of 10~30 rpm. The two limiting rings 27 fixed inside the sliding rod 26 are spaced 47 cm apart and located between the two connecting pipes II 28. They effectively limit the sliding range of the piston block 25 and prevent the piston block 25 from sliding excessively and affecting the paint intake and spraying effect. In addition, one-way valves are provided on connecting pipes II 28, III 29 and IV 30 to control the flow direction of the paint and prevent paint backflow.

[0037] In the drive assembly, two rotating seats 12 are bolted to one side of the storage box 1. A reciprocating screw 11 is mounted between the two rotating seats 12 via bearings, ensuring smooth reciprocating motion of the sliding block 10. The sliding block 10 is slidably fitted into the helical groove of the reciprocating screw 11. A motor 13 with a power of 1.5 kW is bolted to one side of the storage box 1, and its output end is fixedly connected to the reciprocating screw 11. One end of each of the six sliding rods 26 in the same group is fixed to the same sliding plate 16. Sliding grooves 19 are opened on both sides of the storage box 1, allowing the sliding plates 16 to slide smoothly within the grooves 19. One end of each sliding plate 16 is bolted to the same connecting bracket 9, which is then fixed to one side of the sliding block 10. When motor 13 is working, it drives reciprocating screw 11 to rotate. Reciprocating screw 11 drives sliding block 10 to perform reciprocating linear motion. Sliding block 10 drives sliding plate 16 to slide in sliding groove 19 through connecting bracket 9, which in turn drives sliding rod 26 to perform reciprocating linear motion, causing piston block 25 to slide reciprocally in piston tube 22, realizing the intake and spraying of paint. When piston block 25 slides in one direction, the volume of one cavity increases, generating negative pressure, which draws paint from holding chamber 8 through connecting pipe II 28; at the same time, the volume of another cavity decreases, forcing the paint inside out through connecting pipe III 29 or connecting pipe IV 30, and spraying it onto the fabric through nozzle 18.

[0038] The drying chamber 5 is located between two support components 4 on one side, and has a stainless steel shell. It contains heating elements and a fan. The heating elements are electric heating tubes, and their power can be adjusted according to drying requirements. The fan evenly blows the hot air generated by the heating elements onto the fabric, achieving drying of the coated fabric.

[0039] The fixed substrate 21 is hollow. A suction fan installed on one side of the storage box 1 has its air inlet connected to the drying chamber 5 via a pipe, and its exhaust end connected to the fixed substrate 21 via a pipe. Multiple rectangular air holes 17 are arranged at the bottom of the fixed substrate 21, each 1 mm in diameter and 2 mm apart. Hot air from the drying chamber 5 is drawn in by the suction fan, enters the fixed substrate 21, and is then discharged through the air holes 17, forming an air curtain to protect the atomized coating. The air curtain velocity is controlled at 1 m / s, effectively preventing coating escape, avoiding coating waste, and maintaining a clean working environment.

[0040] The rotating shaft 31 of the cleaning mechanism 3 is rotatably mounted on one side of the storage box 1. The rotating shaft 31 is made of stainless steel. Three cams 32 are fixedly sleeved on the outer wall of the rotating shaft 31. The fixing rod 33 fixed inside the storage box 1 is made of high-strength steel. The rotating ring 35, which is rotatably sleeved on the outer wall of the fixing rod 33, corresponds to the cams 32. The striking strip 34, which is fixed on the outer wall of the rotating ring 35, is made of high-strength steel and has a rubber material at the other end. Its length is sufficient to contact the rising section of the fabric. The cams 32 drive the 34 to swing, which can effectively shake off excess paint on the fabric when striking. The striking force range is 1~5N and the frequency is 1~3Hz.

[0041] A rack 15, which is slidably mounted on one side of the storage box 1, slides smoothly via a guide rail. A gear 14, which is fixedly sleeved on the outer wall of the rotating shaft 31, meshes with the rack 15. The tooth pitch of the rack 15 matches that of the gear 14. One end of the rack 15 is welded to the connecting bracket 9. When the drive assembly is working, the motor 13 drives the rack 15 to perform reciprocating linear motion through the transmission mechanism. The rack 15 drives the gear 14 to rotate, the gear 14 drives the rotating shaft 31 to rotate, and the rotating shaft 31 drives the cam 32 to rotate. The cam 32 periodically pushes the rotating ring 35, causing the striking bar 34 to strike the fabric, shaking off excess coating and improving the coating quality.

[0042] In use, the fabric on the unwinding mechanism is passed sequentially between the support assembly 4 and the two sets of guide rollers I20 and connected to the winding mechanism, while the paint is poured into the holding chamber 8. The starter motor 13 drives the reciprocating screw 11 to rotate. During the rotation of the reciprocating screw 11, the spiral groove on its surface drives the sliding block 10 to move back and forth. During the reciprocating movement of the sliding block 10, the connecting bracket 9 can be moved. The movement of the connecting bracket 9 can simultaneously drive the upper and lower sliding plates 16 to move. The movement of the sliding plates 16 can drive the movement of multiple sliding rods 26. The movement of the sliding rods 26 can drive the piston block 25 to move. During the movement of the piston block 25, the paint in the holding chamber 8 can be drawn into the piston tube 22. Since one-way valves are provided on the connecting pipes II 28, III 29 and IV 30, the piston block 25 moves to one side. During the movement, the paint in the holding chamber 8 enters the piston tube 22 through the connecting pipe II 28, but does not exit through the connecting pipe IV 30. When the piston block 25 moves in the reverse direction, due to the action of the one-way valve on the connecting pipe II 28, the paint will not flow in the reverse direction, but will flow through the connecting pipe III 29 and the connecting pipe IV 30 to the connector 24 and be sprayed out through the nozzle 18. At the same time, due to the pressure of the paint flow, the pressure will drive the nozzle 18 to rotate the connector 24, so that the paint is sprayed onto the fabric in a mist-like rotating manner. This saves paint usage while ensuring the spraying effect. At the same time, the winding mechanism and the unwinding mechanism are activated to move the fabric, so that the paint is sprayed while moving. Simultaneously, the drying chamber 5 is activated to dry the fabric, and the suction fan on one side of the storage tank 1 is also activated, allowing the hot air from the drying chamber 5 to enter the fixed substrate 21 and be sprayed out through the air holes 17, forming an air curtain. This air curtain blocks the atomized paint from flying out of the spraying area, further saving paint usage. During the reciprocating movement of the connecting bracket 9, the rack 15 can be driven to move. During the movement of the rack 15, it can cooperate with the gear 14 to drive the rotating shaft 31 to rotate. When the rotating shaft 31 rotates, it can drive the cam 32 to rotate. During the rotation, the cam 32 can lift the striking bar 34, so that the rotating ring 35 rotates a certain angle on the fixed rod 33. When the convex part of the cam 32 moves away from the striking bar 34, the striking bar 34 can quickly reset under gravity and strike the fabric, causing the fabric to vibrate, which can shake off excess paint and guide it through the guide plate 6, and finally return it to the holding cavity 8. When the coated fabric passes through the drying chamber 5, it can be dried.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A coating spraying process for waterproof fabric, characterized in that, Includes the following steps: S1. The fabric is guided by the support assembly (4) and guide roller I (20) to form a path with a height difference; S2. The drive motor (13) drives the piston block (25) to move, sucking the paint in the holding chamber (8) into the piston tube (22) and spraying it onto the fabric through the nozzle (18) while driving the striking strip (34) to periodically strike the fabric to shake off excess paint. S3. The sprayed fabric is dried using a drying box (5), and the hot air in the drying box (5) is introduced into the fixed substrate (21) by a suction fan and discharged through the air hole (17) to form a protective air curtain. S4, the guide plate (6) guides the shaken paint back into the holding chamber (8); Spraying, air curtain protection, cleaning, and drying are carried out simultaneously to ensure uniform coating and reduce paint escape.

2. A coating spraying device for waterproof fabric, used to implement the process described in claim 1, characterized in that, include: Storage box (1); guide plate (6), fixedly installed in the storage box (1) and inclined; baffle plate (7), fixedly installed in the storage box (1) and located above the guide plate (6), the baffle plate (7) and the guide plate (6) form a backflow opening, the storage box (1), the guide plate (6) and the baffle plate (7) together form a holding cavity (8); three sets of support components (4), fixedly installed on the top of the storage box (1); two sets of guide rollers I (20), rotatably installed in the storage box (1); two sets of spraying mechanisms (2), set in the storage box (1) The spraying mechanism (2) is located between two sets of guide rollers I (20), and each set of spraying mechanism (2) includes two fixed base plates (21) located on the upper and lower sides of the fabric respectively; the drying box (5) is located between two adjacent support components (4); the fixed base plate (21) is a hollow structure, and a suction fan is provided on one side of the storage box (1). The air inlet of the suction fan is connected to the drying box (5), and the air outlet is connected to the fixed base plate (21). Multiple air holes (17) are opened at the bottom of the fixed base plate (21); the cleaning mechanism (3) is located on the storage box (1) and is linked with the drive component; The guide roller I (20) and support assembly (4) form a path with height difference in the fabric, and the hot air discharged from the air hole (17) forms a protective air curtain surrounding the spraying area.

3. The coating spraying equipment for waterproof fabric according to claim 2, characterized in that, The spraying mechanism (2) further includes a spraying assembly, which includes: Multiple piston tubes (22) are disposed on a fixed base plate (21). A sliding rod (26) is slidably disposed through the piston tube (22). A piston block (25) is fixedly sleeved on the sliding rod (26). The piston block (25) divides the piston tube (22) into two cavities. The piston tube (22) is connected to two connecting pipes II (28), connecting pipe III (29), and connecting pipe IV (30). The connecting pipe II (28) extends to the holding cavity (8) through the connecting pipe I (23). The bottom ends of the connecting pipe III (29) and the connecting pipe IV (30) are rotatably provided with connectors (24) with nozzles (18). The drive assembly includes two rotating seats (12) fixed to the side wall of the storage box (1), a reciprocating screw (11) rotatably disposed between the rotating seats (12), a sliding block (10) slidably sleeved on the reciprocating screw (11), and a motor (13) driving the reciprocating screw (11). The sliding rod (26) is connected to the slide groove (19) via the sliding plate (16), and the sliding plate (16) on the same side is fixed to the sliding block (10) via the connecting bracket (9).

4. The coating spraying equipment for waterproof fabric according to claim 3, characterized in that, The cleaning mechanism (3) includes: A rotating shaft (31) is rotatably mounted on the side wall of the storage box (1); multiple cams (32) are fixedly sleeved on the rotating shaft (31); a fixed rod (33) is fixedly installed inside the storage box (1); a rotating ring (35) is rotatably sleeved on the fixed rod (33) and corresponds to the cams (32); a striking strip (34) is fixed to the outer wall of the rotating ring (35) and its bottom end is located in the fabric rising section; When the cam (32) rotates, it pushes the rotating ring (35) to cause the striking bar (34) to periodically strike the fabric.

5. The coating spraying equipment for waterproof fabric according to claim 4, characterized in that, Also includes: A rack (15) is slidably disposed on the side wall of the storage box (1); The gear (14) is fixedly sleeved on the rotating shaft (31) and meshes with the rack (15); One end of the rack (15) is fixedly connected to the connecting bracket (9).

6. The coating spraying equipment for waterproof fabric according to claim 3, characterized in that: The sliding rod (26) is fixedly provided with a limiting ring (27); the connecting pipe II (28), connecting pipe III (29) and connecting pipe IV (30) are all provided with one-way valves.

7. The coating spraying equipment for waterproof fabric according to claim 2, characterized in that, The support component (4) includes: Two fixed bases (41) are fixedly installed on the top of the storage box (1); two guide rollers II (42) are rotatably arranged between the fixed bases (41).

8. The coating spraying equipment for waterproof fabric according to claim 3, characterized in that: The nozzle (18) is inclined relative to the connector (24); the connector (24) is rotatably mounted on the bottom end of the connecting pipe III (29) and the connecting pipe IV (30) via a bearing.

9. The coating spraying equipment for waterproof fabric according to claim 2, characterized in that: The guide plate (6) is inclined toward the container (8); the reflux opening connects the container (8) and the guide area.

10. The coating spraying equipment for waterproof fabric according to claim 2, characterized in that: The pores (17) are arranged in a rectangular array at the bottom of the fixed substrate (21); the protective air curtain surrounds the spraying area and blocks the diffusion of the atomized coating.

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