Automatic spraying device for manufacturing glass fiber coated cloth

Abstract

The invention relates to the technical field of glass fiber coated cloth, and discloses an automatic spraying device for manufacturing glass fiber coated cloth, the automatic spraying device comprises a crawler machine, a protective shell is fixedly arranged at the top of the crawler machine, and a material conveying pipe is movably arranged in the protective shell; the ceramic heating pipe and the hot air pipe are arranged, high-temperature hot air is generated through the ceramic heating pipe, the hot air is blown out through a slit of the hot air pipe to form a hot air curtain, the hot air curtain makes contact with paint sprayed out of an air opening of the spraying pipe, and at the moment, the airflow barrier effect of the hot air curtain of the hot air pipe can counteract airflow impact generated when part of the paint is sprayed by the spraying pipe; meanwhile, the hot air pipe and the hot air curtain preheat the coating sprayed by the spraying pipe, so that surface pre-gel is formed when the coating is sprayed on the yarn, the influence of dynamic pressure on the yarn is further reduced, and the situation that part of the yarn laterally moves or gaps between the yarn are enlarged, and consequently the thickness of the cloth cover of a finished product fluctuates is prevented.

Description

Technical Field

[0001] This invention relates to the field of glass fiber coated fabric technology, and more specifically to an automatic spraying device for manufacturing glass fiber coated fabric. Background Technology

[0002] Fiberglass coated fabric, an important composite functional material, is prepared using alkali-free fiberglass cloth as the reinforcing substrate. Specifically, the alkali-free fiberglass cloth undergoes surface pretreatment, followed by coating one or both sides with a resin-based coating such as polyvinyl chloride, polyurethane, or polytetrafluoroethylene. Finally, it is manufactured through processes such as drying and sintering. This material, thanks to the high strength inherent in fiberglass and the excellent chemical resistance, temperature resistance, and electrical insulation properties imparted by the resin coating, has been widely used in numerous fields, such as architectural membrane materials, fireproof roller shutters, motor insulation linings, and high-temperature filter substrates.

[0003] To meet the requirements of different application scenarios regarding surface density, temperature resistance, and mechanical strength, existing technologies typically apply an organic or inorganic composite coating of 20–120 g / m² to the surface of a fiberglass substrate. In industrial production, this coating is mainly achieved using a robotic automated spraying process: the fiberglass cloth is fed into a closed spraying area at a speed of 0.5–2 m / min, and the spraying robot completes the coating accumulation in 3–5 passes according to a preset trajectory; after each pass, it is flash-dried at 80–120 °C to level the coating and remove solvents; simultaneously, an online vision system monitors the coating uniformity and thickness in real time and provides closed-loop feedback to prevent missed spraying, sagging, and thickness deviations.

[0004] However, existing automated spraying processes still have some shortcomings in practical applications that urgently need to be addressed. During automated spraying, to ensure good atomization of the coating, the fan-shaped air pressure of the automatic spray gun is typically set between 0.25 and 0.35 MPa. When the high-speed airflow impacts the surface of the fiberglass cloth, significant dynamic pressure is generated locally. At this time, the fiberglass yarns have not yet been fully impregnated and shaped by the resin, resulting in weak resistance to lateral displacement. Under the impact of this instantaneous airflow, some yarns are prone to lateral displacement or widening of the gaps between yarns, ultimately leading to thickness fluctuations in the finished fabric. These thickness fluctuations further adversely affect subsequent hot-pressing lamination, welding, and other processes, as well as the consistency of the product's insulation performance, reducing the overall quality and reliability of the product. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an automatic spraying device for manufacturing fiberglass coated fabric, including a tracked machine. A protective shell is fixedly installed on the top of the tracked machine. A material conveying pipe is movably installed inside the protective shell, and a ceramic heating pipe is movably installed on one side of the material conveying pipe inside the protective shell. A spraying pipe is fixedly installed on the outside of the material conveying pipe, and a hot air pipe is fixedly installed on the outside of the ceramic heating pipe. A fixing buckle is movably installed on the outside of the spraying pipe, and a connecting buckle is installed inside the fixing buckle. The air outlet of the hot air pipe forms an acute angle with the air outlet of the spraying pipe. Furthermore, the fixing buckle and the connecting buckle fix the spray pipe and the hot air pipe together.

[0006] Furthermore, the hot air duct includes a connecting pipe fixedly disposed on the outside of the ceramic heating tube, a flexible hose fixedly disposed on one side of the connecting pipe, and an air curtain duct fixedly disposed at one end of the flexible hose.

[0007] Furthermore, a baffle plate is fixedly installed inside the air curtain tube, which divides the interior of the air curtain tube into two parts.

[0008] Furthermore, a connecting frame is movably provided on the outer side of the spray tube, and a connecting buckle is movably connected inside the connecting frame, with the rotating pin passing through the connecting frame and the connecting buckle.

[0009] Furthermore, a rotating column is movably provided on the outer side of the connecting frame.

[0010] Furthermore, a scale groove located on the outside of the rotating column is fixedly provided on the outer side of the connecting frame.

[0011] Furthermore, the connecting buckle includes a heat insulation frame, and a connecting shaft is movably provided inside the heat insulation frame. One end of the connecting shaft is fixedly connected to the outside of the air curtain tube, and the other end of the connecting shaft is movably connected to a transmission gear set. A rotating buckle is engaged on the outside of the transmission gear set.

[0012] Furthermore, the bottom of the tracked machine is fixedly equipped with a movable wheel, a high-pressure blower is fixedly equipped on one side of the protective shell, and a servo motor is fixedly equipped on the other side of the material conveying pipe.

[0013] Beneficial effects The technical solution provided by this invention has the following advantages compared with the prior art: This invention is equipped with a ceramic heating tube and a hot air duct. The ceramic heating tube generates high-temperature hot air, which is blown out through the narrow slit of the hot air duct to form a hot air curtain. This hot air then comes into contact with the paint sprayed from the nozzle of the spraying pipe. At this time, the airflow barrier effect of the hot air duct and the hot air curtain can offset part of the airflow impact generated by the paint sprayed by the spraying pipe, thereby reducing the risk of yarn displacement. At the same time, the hot air duct and the hot air curtain preheat the paint sprayed by the spraying pipe, so that the paint forms a surface pregel when it is sprayed on the yarn, further reducing the impact of dynamic pressure on the yarn and preventing some yarns from shifting laterally or the gaps between yarns from widening, which would lead to thickness fluctuations in the finished fabric.

[0014] This invention features a fixing buckle and a connecting buckle. By rotating the pin, the connecting frame and the connecting buckle are fixed together, thereby fixing the hot air pipe and the spray pipe together. When the spray pipe rotates to spray paint, the hot air pipe rotates with the spray pipe, allowing the hot air blown out of the slit of the hot air pipe to preheat the paint sprayed by the spray pipe in real time. At the same time, when there are different types of paint in the conveying pipe, the angle between the hot air curtain of the air curtain pipe and the paint spray can be adjusted according to the properties of different paints, so as to facilitate the preheating of different types of paints during the spraying process. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the protective shell structure of the present invention; Figure 3 This is a schematic diagram of the ceramic heating tube structure in this invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the spray pipe structure of the present invention; Figure 6 This is a schematic diagram of the fixing buckle structure of the present invention; Figure 7 This is a schematic diagram of the connecting buckle structure of the present invention; Figure 8 This is a schematic diagram of the hot air duct structure of the present invention.

[0017] Label Explanation: 11. Tracked conveyor; 12. Casters; 13. Protective housing; 14. Material conveying pipe; 15. High-pressure blower; 16. Servo motor; 17. Ceramic heating tube; 21. Spraying pipe; 22. Hot air duct; 221. Connecting pipe; 222. Flexible hose; 223. Air curtain pipe; 224. Wind deflector; 23. Fixing buckle; 231. Connecting frame; 232. Rotating column; 233. Scale groove; 24. Rotating pin; 25. Connecting buckle; 251. Heat insulation frame; 252. Connecting shaft; 253. Transmission gear set; 254. Rotary buckle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] Example 1: Refer to Figure 1 , Figure 4 and Figure 8 This is the first embodiment of the present invention, which provides an automatic spraying device for manufacturing fiberglass coated fabric, including a tracked machine 11. A protective shell 13 is fixedly provided on the top of the tracked machine 11. A material conveying pipe 14 is movably provided inside the protective shell 13. A ceramic heating pipe 17 located on one side of the material conveying pipe 14 is movably provided inside the protective shell 13. A spraying pipe 21 is fixedly provided on the outside of the material conveying pipe 14. A hot air pipe 22 is fixedly provided on the outside of the ceramic heating pipe 17. A fixing buckle 23 is movably provided on the outside of the spraying pipe 21. A connecting buckle 25 is provided inside the fixing buckle 23. The air outlet of the hot air pipe 22 and the air outlet of the spraying pipe 21 form an acute angle, for example, the included angle is 30°. High-temperature hot air is generated by the ceramic heating tube 17. The hot air is blown out through the slit of the hot air duct 22 and comes into contact with the paint sprayed from the air outlet of the spray pipe 21. For example, the size of the slit of the hot air duct 22 is set between 0.5 and 1 mm. According to the principle of fluid dynamics, the airflow from the slit can form a uniform curtain-like airflow within a distance of 30–50 mm. Thus, the effective range of the hot air curtain of the hot air duct 22 covers the yarn area, so that the wind pressure is reduced to a level that matches the yarn's resistance to blowing. At this time, the airflow barrier effect of the hot air curtain of the hot air duct 22 can offset part of the airflow impact generated by the paint sprayed by the spray pipe 21, thereby reducing the risk of yarn displacement. At the same time, the hot air curtain of the hot air duct 22 preheats the paint sprayed by the spray pipe 21, so that the paint forms a surface pregel when it is sprayed on the yarn, further reducing the impact of dynamic pressure on the yarn and preventing some yarns from shifting laterally or the gaps between yarns from widening, which would lead to thickness fluctuations in the finished fabric.

[0021] The fixing buckle 23 and the connecting buckle 25 fix the spray pipe 21 and the hot air pipe 22 together, so that when the spray pipe 21 rotates for spraying, the hot air pipe 22 will rotate with the spray pipe 21, thereby preheating the sprayed paint in real time, so that the paint forms a surface pregel when it is sprayed onto the yarn.

[0022] A baffle plate 224 is fixedly installed inside the air curtain pipe 223, which divides the inside of the air curtain pipe 223 into two, making the hot air blown out from the slit of the air curtain pipe 223 more uniform and flat. The bottom of the tracked machine 11 is fixedly equipped with a moving wheel 12. A high-pressure blower 15 is fixedly installed on one side of the protective shell 13, and a servo motor 16 is fixedly installed on the other side of the material conveying pipe 14. The moving wheel 12 makes it easy for the operator to adjust the position of the device. The servo motor 16 controls the rotation of the material conveying pipe 14 and the spraying pipe 21 fixedly connected to its outside to adjust the spraying angle. The high-pressure blower 15 provides air pressure to the ceramic heating pipe 17 so that it can be sprayed out evenly.

[0023] Specifically, the unshaped yarn is moved by the crawler 11 into the protective housing 13. At this time, the processed coating is fed into the spraying pipe 21 through the feed pipe 14. Simultaneously, the ceramic heating pipe 17 begins to preheat the air inside. Then, the high-pressure blower 15 pressurizes both the feed pipe 14 and the ceramic heating pipe 17, causing the coating inside the spraying pipe 21 to be evenly sprayed onto the surface of the yarn. At the same time, the hot air inside the ceramic heating pipe 17 is blown out through the slit of the hot air pipe 22. According to fluid dynamics principles, the hot air blown out from the slit, i.e., the slit jet airflow, will reach 30-50 mm at the slit outlet. A uniform curtain-like airflow is formed within a distance of mm. Then, the high-pressure blower 15 is controlled to adjust the air pressure in the hot air pipe 22, thereby adjusting the effective range of the hot air curtain to cover the spraying area of ​​the yarn. This reduces the air pressure of the paint spraying to a level that matches the yarn's resistance to blowing. In turn, the airflow barrier effect of the hot air curtain in the hot air pipe 22 can offset part of the airflow impact generated by the paint spraying pipe 21, so that the paint sprayed by the spraying pipe 21 can be uniformly and stably sprayed on the surface of the yarn, thereby reducing the risk of yarn displacement. Meanwhile, based on the physical properties of the coating inside the feed pipe 14, the ceramic heating pipe 17 preheats the air inside the pipe, matching its preheating temperature with the physical properties of the coating inside the feed pipe 14. The uniform curtain-like airflow formed at the slit of the hot air pipe 22 is hot air, which then comes into contact with the coating sprayed from the air outlet of the spray pipe 21. At this time, the uniform curtain-like airflow preheats the coating sprayed by the spray pipe 21, causing the coating to solidify in time when it is sprayed onto the yarn, thereby pregeling on the yarn surface, fixing the loose yarn, further preventing the yarn from being affected by the airflow generated when the coating is sprayed by the spray pipe 21, reducing the impact of dynamic pressure on the yarn, and preventing some yarns from shifting laterally or the gaps between yarns from widening, which would lead to thickness fluctuations in the finished fabric. After the coating process is completed, the yarn continues to be transported to the next process by the crawler 11. The moving wheels 12 at the bottom of the crawler 11 are designed to allow the staff to flexibly move the position of the entire automatic coating device according to the actual situation of the production site, so as to adapt to different production layouts and process requirements, further improving production efficiency and ease of operation. In addition, the servo motor 16 in the device can precisely control the rotation angle of the feed pipe 14. When it is necessary to adjust the coating direction to adapt to the production of glass fiber coated cloth of different specifications, the servo motor 16 can drive the feed pipe 14 to rotate within the range of 0° - 80° according to the preset program. While the feed pipe 14 rotates, it will drive the coating pipe 21 to rotate. Through the coordinated work of these components, the automatic coating device can effectively solve the problems of easy yarn displacement and fluctuation of finished cloth thickness in traditional coating methods, and improve the production quality and stability of glass fiber coated cloth.

[0024] Example 2: Refer to Figure 2-8This is the second embodiment of the present invention, which provides an automatic spraying device for manufacturing fiberglass coated fabric. The device includes a connecting frame 231 movably mounted on the outer side of a spraying pipe 21, and a movable connecting buckle 25 inside the connecting frame 231. A rotating pin 24 passes through the connecting frame 231 and the connecting buckle 25. By rotating the pin 24, the connecting frame 231 and the connecting buckle 25 are fixed together, thereby fixing the spraying pipe 21 and the hot air pipe 22 together and making them rotate synchronously. When spraying different types of fiberglass coated fabric, the feed pipe 14 is rotated and adjusted according to the type, with an adjustment angle range of 0°-80°. The spraying pipe 21 drives the hot air pipe 22 to rotate and spray the coating material. The hot air blown out from the slit of the hot air pipe 22 preheats the coating material sprayed by the spraying pipe 21 in real time, so that when the coating material sprayed by the spraying pipe 21 at different angles adheres to the yarn, it can form a pre-gel on the surface of the yarn, thereby fixing the surface of the yarn.

[0025] A rotating column 232 is movably provided on the outer side of the connecting frame 231, and a scale groove 233 is fixedly provided on the outer side of the connecting frame 231 on the outer side of the rotating column 232. When the rotating pin 24 passes through the connecting frame 231 and the connecting buckle 25, if it is necessary to adjust the angle between the hot air pipe 22 and the spray pipe 21, the pointer on the rotating column 232 and the scale groove 233 on the outer side of the connecting frame 231 can be observed. When the operator controls the rotating pin 24 to rotate, the rotating pin 24 will drive the rotating column 232 to rotate, which in turn drives the pointer on the outer side of the rotating column 232 to rotate. By judging the rotation angle of the rotating pin 24 by the position of the pointer on the scale groove 233, the angle between the hot air pipe 22 and the spray pipe 21 can be adjusted, which increases the comfort of the operator.

[0026] The connecting buckle 25 includes a heat insulation frame 251. A connecting shaft 252 is movably mounted inside the heat insulation frame 251. One end of the connecting shaft 252 is fixedly connected to the outside of the air curtain duct 223. A transmission gear set 253 is movably connected to the other end of the connecting shaft 252. A rotating buckle 254 meshes with the outside of the transmission gear set 253. When the rotating pin 24 passes between the connecting frame 231 and the heat insulation frame 251, the rotating pin 24 will engage with the rotating... The buckle 254 is engaged with the rotating pin 24, which rotates the buckle 254 together. The rotating buckle 254 then drives the transmission gear set 253 and the connecting shaft 252 in sequence, thereby adjusting the rotation angle of the air curtain pipe 223. Based on the physical properties of the paint in the conveying pipe 14 and the spraying air pressure of the spraying pipe 21, the hot air curtain can preheat the sprayed paint when it comes into contact with the uniform curtain-like airflow formed at the slit of the air curtain pipe 223, but will not cause the paint to solidify.

[0027] Specifically, first, the connecting bracket 231 is installed above the spray pipe 21. Then, the connecting bracket 231 and the heat insulation bracket 251 are closed together. At this time, the rotating pin 24 is inserted between the connecting bracket 231 and the heat insulation bracket 251 to fix them together. Next, the rotating pin 24 is controlled to rotate on the outside of the connecting bracket 231. Since the rotating pin 24 has a hexagonal structure, rotating the pin 24 will drive the rotating buckle 254 to rotate inside the heat insulation bracket 251. The rotating buckle 254 causes the connecting shaft 252 to rotate through the transmission gear set 253. The rotating connecting shaft 252 drives the air curtain pipe 223 to rotate, thereby adjusting the angle of the hot air blown out of the slit of the air curtain pipe 223, and simultaneously adjusting the angle between the air curtain pipe 223 and the air outlet of the spray pipe 21 to ensure the air... The hot air blown out of the slit in the curtain pipe 223 can always effectively contact the paint sprayed from the spray pipe 21, achieving real-time preheating. At the same time, when different types of paint are inserted into the feed pipe 14, the angle between the hot air curtain in the curtain pipe 223 and the paint spray can be adjusted according to the properties of different paints, so that different types of paints can be preheated during the spraying process. As a result, when the paint comes into contact with the yarn, it will form a surface pregel on the yarn, reducing the impact of dynamic pressure on the yarn. Meanwhile, the top material of the heat insulation frame 251 can be set as a heat insulation pad to prevent the hot air in the curtain pipe 223 from interfering with the unsprayed paint in the spray pipe 21, causing the unsprayed paint in the spray pipe 21 to solidify inside the pipe, thereby affecting the uniform spraying of the paint in the spray pipe 21, and further improving the overall quality and reliability of the product.

[0028] 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 the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic spraying device for manufacturing fiberglass coated fabric, comprising a tracked machine (11), characterized in that: The top of the tracked machine (11) is fixedly provided with a protective shell (13), and a material conveying pipe (14) is movably provided inside the protective shell (13). A ceramic heating pipe (17) located on one side of the material conveying pipe (14) is movably provided inside the protective shell (13). A spray pipe (21) is fixedly provided on the outside of the material conveying pipe (14), a hot air pipe (22) is fixedly provided on the outside of the ceramic heating pipe (17), a fixing buckle (23) is movably provided on the outside of the spray pipe (21), a connecting buckle (25) is provided inside the fixing buckle (23), and the air outlet of the hot air pipe (22) forms an acute angle with the air outlet of the spray pipe (21).

2. The automatic spraying device for manufacturing glass fiber coated cloth according to claim 1, characterized in that: The fixing buckle (23) and the connecting buckle (25) fix the spray pipe (21) and the hot air pipe (22) together.

3. The automatic spraying device for manufacturing glass fiber coated cloth according to claim 2, characterized in that: The hot air duct (22) includes a connecting pipe (221) fixedly installed on the outside of the ceramic heating pipe (17), a flexible hose (222) fixedly installed on one side of the connecting pipe (221), and an air curtain pipe (223) fixedly installed at one end of the flexible hose (222).

4. The automatic spraying device for manufacturing glass fiber coated cloth according to claim 3, characterized in that: The air curtain tube (223) is fixedly provided with a baffle plate (224), which divides the interior of the air curtain tube (223) into two parts.

5. An automatic spraying device for manufacturing glass fiber coated cloth according to claim 4, characterized in that: The outer side of the spray pipe (21) is provided with a connecting frame (231), and the inside of the connecting frame (231) is connected with a connecting buckle (25). The inside of the connecting frame (231) is connected with a rotating pin (24), and the rotating pin (24) passes through the connection frame (231) and the connecting buckle (25).

6. An automatic spraying device for manufacturing glass fiber coated cloth according to claim 5, characterized in that: The outer side of the connecting frame (231) is provided with a rotating column (232).

7. An automatic spraying device for manufacturing glass fiber coated cloth according to claim 6, characterized in that: The outer side of the connecting frame (231) is fixedly provided with a scale groove (233) located outside the rotating column (232).

8. An automatic spraying device for manufacturing glass fiber coated cloth according to claim 7, characterized in that: The connecting buckle (25) includes a heat insulation frame (251), and a connecting shaft (252) is movably provided inside the heat insulation frame (251). One end of the connecting shaft (252) is fixedly connected to the outside of the air curtain pipe (223), and the other end of the connecting shaft (252) is movably connected to a transmission gear set (253). A rotating buckle (254) is meshed on the outside of the transmission gear set (253).

9. An automatic spraying device for manufacturing glass fiber coated cloth according to claim 8, characterized in that: The bottom of the tracked machine (11) is fixedly provided with a moving wheel (12), a high-pressure blower (15) is fixedly provided on one side of the protective shell (13), and a servo motor (16) is fixedly provided on the other side of the material conveying pipe (14).

Images