A coating device for processing composite plastic woven bags

Abstract

This invention relates to the field of coating technology for plastic woven bags, and specifically discloses a coating device for processing composite plastic woven bags. The device includes a worktable, a guide component fixedly connected to the top of the worktable, a coating component fixedly connected to the center of the top of the worktable, rollers rotatably connected to both sides of the worktable, a recycling component fixedly connected to the bottom of the coating component, and shaping components evenly arranged on the inner side of the support frame. This coating device for processing composite plastic woven bags employs a dual cooling method, primarily water cooling and secondarily air cooling. Combined with U-shaped cold water pipes to increase the heat exchange area, it can quickly remove heat from the rollers and the film material, accelerating the curing speed of the coated film material. This results in uniform cooling of the rollers as a whole, eliminating localized temperature differences when the film material and rollers are in contact during cooling. The heat dissipation duct and guide mechanism plan the airflow path, and air cooling simultaneously acts on the rollers, coolant, and water tank, resulting in high airflow utilization.

Description

Technical Field

[0001] This invention relates to the field of plastic woven bag coating technology, specifically a coating device for processing composite plastic woven bags. Background Technology

[0002] Composite plastic woven bags are made primarily from plastics such as polypropylene and polyethylene. After being drawn and woven into a base fabric, a plastic film is then laminated onto the surface through coating, lamination, or composite processes. This process retains the advantages of woven fabric, such as high tensile strength and good load-bearing capacity, while also providing excellent waterproof, moisture-proof, sealing, wear-resistant, and tear-resistant properties. The coating device used in the processing of composite plastic woven bags is the core equipment in the composite production of woven bags. Using polyethylene, polypropylene, and other materials as coating raw materials, the coating is heated and melted, then uniformly extruded and cast into a film through a die. This film is then hot-pressed and bonded to the plastic woven fabric substrate under the action of composite pressure rollers, improving the waterproofness, sealing, and mechanical strength of the woven bag. It is widely applicable to the large-scale production of composite woven bags for packaging in the fields of grain and building materials.

[0003] Chinese patent CN220177405U discloses a double-sided coating device for producing composite plastic woven bags, including a base plate, two exhaust fans installed inside each fixed frame, two support columns fixedly connected to the inner wall of each fixed frame, and a heating wire sleeved on the outside of each support column. This device, through the cooperation of a motor, a first gear, a second gear, and a biting roller, allows the two biting rollers to rotate in opposite directions using the motor, enabling uniform conveying of the woven bags. The heating wire, in conjunction with the exhaust fans, heats the air, which is then blown onto the coated liquid adhesive for rapid drying, ensuring efficient subsequent processing of the coated composite plastic woven bags. Existing technical solutions use drying to carry out membrane coating operations. Although this method can speed up the drying process to some extent, its overall processing efficiency is significantly lower than that of cooling and shaping methods, making it difficult to meet the needs of efficient and continuous coating processing. In addition, high-temperature drying can easily cause defects such as membrane deformation, wrinkling, poor composite adhesion, and uneven coating thickness. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a coating device for processing composite plastic woven bags, comprising a worktable, a guide component fixedly connected to the top of the worktable, a coating component fixedly connected to the middle of the top of the worktable, rollers rotatably connected to both sides of the worktable, a recycling component fixedly connected to the bottom of the coating component, a support frame fixedly connected to the side of the top of the worktable away from the guide component, and shaping components evenly arranged on the inner side of the support frame; The shaping component includes a roller and a drive unit. The drive unit is fixedly connected to the side of the support frame. One end of the roller is fixedly connected to a cooling mechanism, and the other end of the roller is fixedly connected to a cold water tank. A cold water pipe is fixedly connected to the inner side of the roller. A guide mechanism is fixedly connected to the inner cavity of the cold water tank near the roller. The cold water pipe is U-shaped. One end of the cold water pipe is fixedly connected to a water inlet mechanism, and the other end of the cold water pipe is fixedly connected to a water outlet mechanism. Heat dissipation ducts are provided on both sides of the roller near the cold water pipe. The side of the cold water tank is rotatably connected to the inner side of the support frame. Furthermore, the air-cooling mechanism includes an air guide shaft, the side of which is rotatably connected to the inner side of the support frame. The middle part of one end of the air guide shaft is fixedly connected to the output end of the drive component via a drive shaft. The other end of the air guide shaft is fixedly connected to an air-cooling shell. The end of the air-cooling shell away from the air guide shaft is fixedly connected to the inner side of the roller. Both sides of the inner cavity of the air-cooling shell are fixedly connected to brackets, and a motor is fixedly connected to one bracket. A fan blade is rotatably connected between the two brackets. The middle part of the fan blade is fixedly connected to the output end of the motor. Both ends of the air guide shaft are provided with a second annular groove. The side of the air guide shaft is uniformly provided with a first annular groove. The first annular groove and the second annular groove are connected. Furthermore, the guiding mechanism includes a guiding shell, an air inlet slot, and an air outlet slot. The side of the guiding shell is fixedly connected to the inner side of the cold water tank. Both sides of the guiding shell have through holes, which are concentrically arranged with the heat dissipation air duct. The middle of the guiding shell has symmetrical relief slots, which are fixedly connected to the side of the cold water pipe. The air outlet slot is annularly opened on the inner side of the cold water tank and penetrates the inner wall of the cold water tank. The air inlet slots are symmetrically opened on both sides of the annular groove in the middle of the guiding shell that abut against the cold water tank. Furthermore, the water inlet mechanism includes a baffle and a water inlet pump. The output end of the water inlet pump is fixedly connected to the inlet end of the cold water pipe. The side of the baffle is fixedly connected to the inner side of the cold water tank. A mesh plate is fixedly connected to the side of the baffle. A guide vane is rotatably connected to the side of the mesh plate at the output end of the water inlet pump. A telescopic rod is fixedly connected to one end of the guide vane. A connecting block is fixedly connected to the other end of the telescopic rod. Scrapers are fixedly connected to both sides of the connecting block. The scrapers are in contact with the mesh plate. A connecting spring is sleeved on the telescopic rod. Both ends of the connecting spring are fixedly connected to both sides of the telescopic rod. Furthermore, the water outlet mechanism includes a water outlet pump and a collection box. The side of the collection box is fixedly connected to the end of the cold water tank away from the roller shaft. The output end of the water outlet pump is fixedly connected to the outlet end of the cold water pipe. A filter pipe is fixedly connected to the input end of the water outlet pump. The end of the filter pipe away from the water outlet pump is fixedly connected to the inside of the collection box. A filter plate is fixedly connected to the inside of the collection box. A one-way return pipe is fixedly connected to the bottom of the inside of the collection box. The other end of the one-way return pipe is fixedly connected to the inside of the cold water tank.

[0005] This invention provides a coating apparatus for processing composite plastic woven bags. It has the following beneficial effects: 1. The coating device for processing composite plastic woven bags adopts a dual cooling method with water cooling as the main method and air cooling as the auxiliary method. With the addition of U-shaped cold water pipes to increase the heat exchange area, it can quickly remove the heat from the roller and the film material, accelerate the curing speed of the coated film material, and make the overall cooling of the roller uniform. There is no local temperature difference when the film material and the roller are bonded and cooled. The heat dissipation duct and the guiding mechanism plan the airflow path. The air cooling acts on the roller, coolant and water tank at the same time, and the airflow utilization rate is high.

[0006] 2. The coating device for processing composite plastic woven bags achieves rapid external gas supply through annular groove one and annular groove two, avoiding insufficient or stagnant airflow inside the air-cooled shell, accelerating gas flow efficiency, keeping air-cooled heat dissipation in a highly efficient state, rapidly reducing the temperature of the coated film material, and avoiding problems such as coating adhesion, damage, and wrinkling when the high-temperature film material is rolled up.

[0007] 3. The coating device for processing composite plastic woven bags has an airflow path that runs from the roller heat dissipation duct to the guide shell and cold water tank. A single air supply can achieve dual heat dissipation of the roller and coolant, greatly improving the airflow utilization efficiency. By continuously cooling the cold water tank and internal coolant through airflow, the coolant temperature can be kept constant, avoiding the coolant failure due to overheating caused by repeated heat exchange.

[0008] 4. The coating device for processing composite plastic woven bags uses a continuous flow of coolant in the cold water pipe for heat exchange, which can stably cool the rollers and ensure that the film material is cooled and shaped evenly and reliably after coating. The device uses water flow power to drive a scraper to automatically remove impurities from the screen, achieving self-cleaning and solving the problem of screen blockage.

[0009] 5. The coating device for processing composite plastic woven bags achieves two-stage filtration through a filter tube and a filter plate in the collection box, removing scale and other impurities from the coolant and ensuring the cleanliness of the coolant. Impurities are collected in a directional manner and are concentrated in the collection box for interception, preventing them from adhering to the inner wall of the pipe. The filtered coolant is returned to the cold water tank for reuse through a one-way return pipe, realizing a closed-loop circulation. Attached Figure Description

[0010] Figure 1This is a schematic diagram of the coating device for processing composite plastic woven bags according to the present invention; Figure 2 This is a schematic diagram of the structure of the standardized component of the present invention; Figure 3 This is a schematic diagram of the cold water pipe structure of the present invention; Figure 4 This is a schematic diagram of the heat dissipation air duct structure of the present invention; Figure 5 This is a schematic diagram of the air-cooling mechanism of the present invention; Figure 6 This is a schematic diagram of the guiding mechanism of the present invention; Figure 7 This is a schematic diagram of the water inlet mechanism of the present invention; Figure 8 This is a schematic diagram of the water outlet mechanism of the present invention.

[0011] In the diagram: 1. Workbench; 2. Guide component; 3. Coating component; 4. Roller; 5. Recycling component; 6. Support frame; 7. Shaping component; 71. Roller; 72. Drive component; 73. Air-cooling mechanism; 731. Air guide shaft; 732. Annular groove one; 733. Annular groove two; 734. Air-cooling housing; 735. Bracket; 736. Fan blade; 737. Motor; 74. Cold water tank; 75. Guide mechanism; 751. Guide housing; 752. Through hole; 75 3. Clearance slot; 754. Air inlet slot; 755. Air outlet slot; 76. Water inlet mechanism; 761. Baffle; 762. Water inlet pump; 763. Mesh plate; 764. Guide vane; 765. Telescopic rod; 766. Connecting spring; 767. Connecting block; 768. Scraper; 77. Cold water pipe; 78. Water outlet mechanism; 781. Water outlet pump; 782. Collection box; 783. Filter pipe; 784. Filter plate; 785. One-way return pipe; 79. Heat dissipation duct. Detailed Implementation

[0012] Please see Figure 1 The present invention provides a coating device for processing composite plastic woven bags, including a workbench 1, a guide component 2 fixedly connected to the top of the workbench 1, and rollers 4 rotatably connected to both sides of the workbench 1. After the device is started, the unwinding mechanism on the roller 4 on one side of the workbench 1 smoothly conveys the plastic woven fabric substrate to the guide component 2. After being guided by the guide component 2, the substrate is conveyed to the bottom of the coating component 3. The top center of the workbench 1 is fixedly connected to the coating component 3. The coating raw materials such as polyethylene and polypropylene in the coating component 3 are heated, melted and plasticized and then fed into the T-shaped die head in the coating component 3. The melt is extruded through the slit of the die head to form a continuous and uniform coating curtain. The thickness and width uniformity of the film can be controlled by the die head fine adjustment bolt. The extruded hot melt film curtain falls vertically and meets the woven fabric conveyed synchronously at the composite pressure roller station. Under the combined action of high temperature and pressure, the hot melt film penetrates into the fiber gaps of the woven fabric and tightly adheres to the woven fabric substrate to complete the composite process. A recycling component 5 is fixedly connected to the bottom of the coating component 3. The recycling component 5, which is provided below the coating component 3, can collect the excess film liquid generated during the coating process. A support frame 6 is fixedly connected to the top of the workbench 1 on the side away from the guide component 2. Shaping components 7 are evenly arranged on the inner side of the support frame 6. The composite blank then enters the shaping component 7. The coated fabric adheres tightly to the shaping component 7. The fabric passes around the three shaping components 7 on the support frame 6 in an S-shape. After being cooled step by step, the coating gradually changes from a molten soft state to a semi-cured state, and finally completely cures and shapes. Finally, the coated composite woven fabric is pulled and conveyed at a constant speed by the traction and winding mechanism on the roller 4 on the other side of the workbench 1, and then wound into a roll. Example 1, please refer to Figures 2-4 The present invention also includes a shaping component 7, which, after the film material is coated and laminated, sequentially surrounds the rollers 71 arranged in a triangular pattern on the support frame 6; The drive unit 72 is fixedly connected to the side of the support frame 6, and the side of the cold water tank 74 is rotatably connected to the inner side of the support frame 6. When the drive unit 72 is started, its output end drives the roller 71 and the cold water tank 74 to rotate on the support frame 6. The roller 71 contacts the membrane material, and while conveying the membrane material, it cools the surface of the membrane material. A cooling water pipe 77 is fixedly connected to the inner side of the roller 71. The cooling water pipe 77 is U-shaped. One end of the cooling water pipe 77 is fixedly connected to a water inlet mechanism 76, and the other end of the cooling water pipe 77 is fixedly connected to a water outlet mechanism 78. At the same time, the water inlet mechanism 76 is opened to continuously transport the coolant in the cooling water tank 74 to the U-shaped cooling water pipe 77 inside the roller 71. The water outlet mechanism 78 at the outlet end of the cooling water pipe 77 is opened to allow the coolant to flow quickly in the cooling water pipe 77. The temperature of the roller 71 is quickly reduced through water cooling heat exchange, thereby accelerating the cooling and shaping efficiency of the coated film. One end of the roller 71 is fixedly connected to an air-cooling mechanism 73. The air-cooling mechanism 73 is started simultaneously when the coolant cools the roller 71 through the cold water pipe 77. Heat dissipation ducts 79 are provided on both sides of the roller 71 near the cooling water pipe 77. The airflow generated by the air-cooling mechanism 73 assists in cooling the roller 71 through the heat dissipation ducts 79 on both sides of the roller 71, and also blows air to dissipate heat from the coolant that has completed heat exchange in the cooling water pipe 77, thereby accelerating its cooling rate. A guide mechanism 75 is fixedly connected to the side of the inner cavity of the cold water tank 74 near the roller 71, and the other end of the roller 71 is fixedly connected to the cold water tank 74. At the same time, the airflow is blown into the cold water tank 74 through the guide mechanism 75 to maintain the temperature of the coolant in the cold water tank 74 and avoid the coolant from becoming too hot due to continuous heat exchange. Example 2, please refer to Figure 5 The present invention also includes a wind-cooling mechanism 73. Both sides of the inner cavity of the wind-cooling shell 734 are fixedly connected to brackets 735, and a motor 737 is fixedly connected to one bracket 735. A fan blade 736 is rotatably connected between the two brackets 735. The middle part of the fan blade 736 is fixedly connected to the output end of the motor 737. When the roller 71 is cooled, the motor 737 is started. The output end of the motor 737 drives the fan blade 736 to rotate between the two brackets 735 inside the wind-cooling shell 734. The airflow generated by the rotation of the fan blade 736 flows out through the heat dissipation ducts 79 on both sides of the roller 71, quickly cooling the roller 71 and accelerating the cooling of the roller 71. At the same time, the airflow can cool the coolant that has completed heat exchange in the cold water pipe 77 by air cooling, so that it can be cooled down quickly, thereby reducing the temperature of the roller 71 surface and the coated film material, avoiding the adhesion of the high temperature film material during winding, and further improving the heat dissipation efficiency of the roller 71 surface. The side of the air guide shaft 731 is rotatably connected to the inside of the support frame 6. The middle part of one end of the air guide shaft 731 is fixedly connected to the output end of the drive component 72 through the drive shaft. On the other hand, the drive component 72 is started, and the output end of the drive component 72 drives the guide shaft to rotate inside the support frame 6 through the output shaft. Both ends of the air guide shaft 731 are provided with a second annular groove 733, and the side of the air guide shaft 731 is provided with a first annular groove 732. The first annular groove 732 and the second annular groove 733 are connected. By pre-setting the first annular groove 732 and the second annular groove 733, when the fan blade 736 rotates in the air-cooled housing 734, the external air can be guided to quickly enter the interior of the air-cooled housing 734, accelerate the airflow circulation speed, and further improve the overall cooling and heat dissipation efficiency. Please see Figure 6 It also includes a guide mechanism 75. A relief groove 753 is symmetrically provided in the middle of the guide housing 751. Through holes 752 are provided on both sides of the guide housing 751. The through holes 752 are concentrically arranged with the heat dissipation duct 79. When the airflow generated by the rotation of the fan blade 736 performs air cooling on the roller 71, the airflow flows along the heat dissipation duct 79 inside the roller 71 and enters the annular groove on the side of the guide housing 751 through the through holes 752 on both sides of the guide housing 751. An air outlet slot 755 is annularly formed inside the cold water tank 74 and penetrates the inner wall of the cold water tank 74. An air inlet slot 754 is symmetrically formed on both sides of the annular groove in the middle of the guide housing 751 and abuts against the cold water tank 74. Then, the airflow passes through the air inlet slots 754 on both sides of the cold water tank 74, flows into the air outlet slot 755 on the side of the cold water tank 74 and is discharged. The air outlet slot 755 guides the airflow and simultaneously cools the cold water tank 74. It allows the coolant that has completed heat exchange and increased in temperature to flow back to the cold water tank 74 and cool down quickly, ensuring the cooling effect of the coolant circulating repeatedly and avoiding the overall cooling efficiency from being reduced due to the coolant being too hot for a long time. Example 3, please refer to Figure 7 The present invention also includes a water inlet mechanism 76, wherein the output end of the water inlet pump 762 is fixedly connected to the water inlet end of the cold water pipe 77, and after the water inlet pump 762 is started, the water inlet pump 762 continuously sends the coolant in the cold water tank 74 into the pipe from the water inlet end of the cold water pipe 77. The coolant flows continuously inside the cold water pipe 77, and cools the working roller 71 through heat exchange; The side of the baffle 761 is fixedly connected to the inside of the cold water tank 74. A mesh plate 763 is fixedly connected to the side of the baffle 761. The inside of the cold water tank 74 is equipped with a baffle 761 and a mesh plate 763. The baffle 761 can guide and separate the low-temperature coolant that is about to enter the cold water pipe 77 from the high-temperature coolant that flows back to the cold water tank 74 after heat exchange. The mesh plate 763 can intercept and filter impurities in the coolant. A guide vane 764 is rotatably connected to the side of the screen plate 763 at the output end of the water pump 762. One end of the guide vane 764 is fixedly connected to a telescopic rod 765, and the other end of the telescopic rod 765 is fixedly connected to a connecting block 767. Scrapers 768 are fixedly connected to both sides of the connecting block 767. The water flow formed by the continuous delivery of coolant by the water pump 762 will drive the guide vane 764 on the screen plate 763 to rotate. The guide vane 764 drives the connecting block 767 to rotate synchronously through the telescopic rod 765, so that the scrapers 768 on both sides of the connecting block 767 are in contact with the surface of the screen plate 763 and rotate. The scraper 768 contacts the mesh plate 763. A connecting spring 766 is sleeved on the telescopic rod 765. Both ends of the connecting spring 766 are fixedly connected to both sides of the telescopic rod 765. At the same time, the connecting spring 766 on the telescopic rod 765 is kept in a stretched state. The elastic force pushes the telescopic rod 765 to drive the connecting block 767 and the scrapers 768 on both sides to continuously press against the surface of the mesh plate 763. When the coolant flows through the mesh plate 763, the rotating scraper 768 can scrape off the impurities attached to the mesh plate 763 in real time, so as to prevent the impurities from accumulating on the mesh plate 763 with the water flow and causing blockage, thus ensuring smooth circulation of coolant. Please see Figure 8The present invention also includes a water outlet mechanism 78, wherein the output end of the water outlet pump 781 is fixedly connected to the water outlet end of the cold water pipe 77, and the water inlet pump 762 continuously sends the coolant in the cold water tank 74 into the pipe through the water inlet end of the cold water pipe 77, while the water outlet pump 781 at the water outlet end of the cold water pipe 77 is started simultaneously. A filter tube 783 is fixedly connected to the input end of the water pump 781. The end of the filter tube 783 away from the water pump 781 is fixedly connected to the inside of the collection box 782. The water pump 781 pumps the coolant that has completed heat exchange in the cold water pipe 77 to the filter tube 783 for filtration to remove scale and other impurities mixed in the coolant and prevent them from causing pipe blockage with the circulating water flow. The side of the collection box 782 is fixedly connected to the end of the cold water tank 74 away from the roller 4. The coolant flows through the mesh on the filter plate 784 into the cold water tank 74 for temporary storage. The intercepted impurities continue to flow with part of the coolant under the drive of the outlet pump 781 and enter the collection box 782. A filter plate 784 is fixedly connected to the inside of the collection box 782, and a one-way return pipe 785 is fixedly connected to the bottom of the inside of the collection box 782. The other end of the one-way return pipe 785 is fixedly connected to the inside of the cold water tank 74. Through the further interception and filtration of the filter plate 784 inside the collection box 782, impurities are trapped in the collection box 782. The filtered coolant is returned to the cold water tank 74 through the one-way return pipe 785 on the side of the collection box 782, realizing recycling. Specific workflow: After the device is started, the unwinding mechanism on the roller 4 on one side of the workbench 1 smoothly conveys the plastic woven fabric substrate to the guide component 2. After being guided by the guide component 2, the substrate is conveyed to the bottom of the coating component 3. The coating materials such as polyethylene and polypropylene in the coating component 3 are heated, melted and plasticized and then fed into the T-shaped die in the coating component 3. The melt is extruded through the slit of the die to form a continuous and uniform coating curtain. The thickness and width uniformity of the film can be controlled by the die fine adjustment bolt. The extruded hot melt film curtain falls vertically and meets the woven fabric conveyed synchronously at the composite pressure roller station. Under the combined action of high temperature and pressure, the hot melt film penetrates into the fiber gaps of the woven fabric and tightly adheres to the woven fabric substrate to complete the composite process. The recycling component 5, which is installed below the coating component 3, can collect the excess film liquid generated during the coating process. The composite blank then enters the shaping component 7. The coated fabric adheres tightly to the shaping component 7. The fabric passes around the three shaping components 7 on the support frame 6 in an S-shape. After being cooled step by step, the coating gradually changes from a molten soft state to a semi-cured state, and finally completely cures and shapes. Finally, the coated composite woven fabric is pulled and conveyed at a constant speed by the traction and winding mechanism on the roller 4 on the other side of the workbench 1, and then wound into a roll. After the membrane material is coated and laminated, it is sequentially wrapped around the rollers 71 arranged in a triangle on the support frame 6; Start the drive unit 72, whose output end drives the roller 71 to rotate on the support frame 6. The roller 71 contacts the film material, and while conveying the film material, it cools the surface of the film material. At the same time, the water inlet mechanism 76 is turned on to continuously transport the coolant in the cold water tank 74 to the U-shaped cold water pipe 77 inside the roller 71, and the water outlet mechanism 78 at the outlet end of the cold water pipe 77 is turned on to allow the coolant to flow quickly in the cold water pipe 77. The temperature of the roller 71 is quickly reduced through water cooling heat exchange, thereby accelerating the cooling and shaping efficiency of the coated film. During the process of cooling the roller 71 by the coolant through the cold water pipe 77, the air cooling mechanism 73 is started simultaneously; The airflow generated by the air-cooling mechanism 73, on the one hand, assists in cooling the roller 71 through the heat dissipation air ducts 79 on both sides of the roller 71, and on the other hand, blows air to dissipate heat from the coolant that has completed heat exchange in the cold water pipe 77, thereby accelerating its cooling rate. At the same time, the airflow is blown into the cold water tank 74 through the guide mechanism 75 to maintain the temperature of the coolant in the cold water tank 74 and avoid the coolant from overheating due to continuous heat exchange. When cooling the roller 71, the motor 737 is started. The output of the motor 737 drives the fan blade 736 to rotate between the two supports 735 inside the air-cooled housing 734. The airflow generated by the rotation of the fan blade 736 flows out through the heat dissipation ducts 79 on both sides of the roller 71, quickly cooling the roller 71 and accelerating the cooling of the roller 71. At the same time, the airflow can cool the coolant that has completed heat exchange in the cold water pipe 77 by air cooling, so that it can be cooled down quickly, thereby reducing the temperature of the roller 71 surface and the coated film material, avoiding the adhesion of the high temperature film material during winding, and further improving the heat dissipation efficiency of the roller 71 surface. On the other hand, the drive unit 72 is activated, and the output end of the drive unit 72 drives the guide shaft to rotate inside the support frame 6 through the output shaft. By pre-setting annular groove 1 732 and annular groove 2 733, when the fan blade 736 rotates inside the air-cooled housing 734, the external air can be guided to quickly enter the air-cooled housing 734, accelerating the airflow circulation speed and further improving the overall cooling and heat dissipation efficiency. When the airflow generated by the rotation of the fan blade 736 cools the roller 71, the airflow flows along the heat dissipation channel 79 inside the roller 71 and enters the annular groove on the side of the guide housing 751 through the through holes 752 on both sides of the guide housing 751. Subsequently, the airflow passes through the air inlet slots 754 on both sides of the cold water tank 74, flows into the air outlet slots 755 that circulate and pass through the side of the cold water tank 74 and is discharged. The airflow is guided by the air outlet slots 755, and the cold water tank 74 is cooled by air at the same time. It allows the coolant that has completed heat exchange and increased in temperature to flow back to the cold water tank 74 and cool down quickly, ensuring the cooling effect of the coolant circulating repeatedly and avoiding the overall cooling efficiency from being reduced due to the coolant being too hot for a long time. After the water inlet pump 762 is started, the water inlet pump 762 continuously sends the coolant in the cold water tank 74 into the pipe from the water inlet end of the cold water pipe 77; The coolant flows continuously inside the cold water pipe 77, and cools the working roller 71 through heat exchange; The cold water tank 74 is equipped with a baffle 761 and a mesh plate 763. The baffle 761 can guide and separate the low-temperature coolant that is about to enter the cold water pipe 77 from the high-temperature coolant that returns to the cold water tank 74 after heat exchange, while the mesh plate 763 can intercept and filter impurities in the coolant. The water flow formed by the continuous delivery of coolant by the water pump 762 will drive the guide vanes 764 on the mesh plate 763 to rotate. The guide vanes 764 drive the connecting block 767 to rotate synchronously through the telescopic rod 765, so that the scrapers 768 on both sides of the connecting block 767 are in contact with the surface of the mesh plate 763 and rotate. At the same time, the connecting spring 766 on the telescopic rod 765 remains in a stretched state, and the elastic force pushes the telescopic rod 765 to drive the connecting block 767 and the scrapers 768 on both sides to continuously press against the surface of the mesh plate 763. When the coolant flows through the mesh plate 763, the rotating scraper 768 can scrape off the impurities attached to the mesh plate 763 in real time, so as to prevent the impurities from accumulating on the mesh plate 763 with the water flow and causing blockage, thus ensuring smooth circulation of coolant. The mesh plate 763 can intercept impurities in the coolant and prevent them from entering the cold water pipe 77 and the water pump 762, thus avoiding pipe blockage or component wear. The connecting spring 766, together with the telescopic rod 765, ensures that the scraper 768 is always pressed against the mesh plate 763, cleaning without dead corners and further ensuring smooth circulation of coolant. While the inlet pump 762 continuously pumps the coolant in the cold water tank 74 into the pipe through the inlet end of the cold water pipe 77, the outlet pump 781 at the outlet end of the cold water pipe 77 starts simultaneously. The water pump 781 pumps the coolant that has completed heat exchange in the cold water pipe 77 to the filter pipe 783 for filtration to remove scale and other impurities mixed in the coolant and prevent them from causing pipe blockage with the circulating water flow. Coolant flows through the mesh on the filter plate 784 into the cold water tank 74 for temporary storage, while the intercepted impurities continue to flow with part of the coolant under the drive of the outlet pump 781 and enter the collection box 782. Impurities are trapped inside the collection box 782 by the internal filter plate 784, and the filtered coolant is returned to the cold water tank 74 through the one-way return pipe 785 on the side of the collection box 782, thus achieving recycling.

[0013] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A coating apparatus for processing composite plastic woven bags, characterized in that, The workbench (1) includes a guide component (2) fixedly connected to the top of the workbench (1), a coating component (3) fixedly connected to the middle of the top of the workbench (1), rollers (4) rotatably connected to both sides of the workbench (1), a recycling component (5) fixedly connected to the bottom of the coating component (3), a support frame (6) fixedly connected to the top of the workbench (1) away from the guide component (2), and shaping components (7) evenly arranged on the inner side of the support frame (6). The shaping component (7) includes a roller (71) and a drive component (72). The drive component (72) is fixedly connected to the side of the support frame (6). One end of the roller (71) is fixedly connected to a cooling mechanism (73), and the other end of the roller (71) is fixedly connected to a cold water tank (74). A cold water pipe (77) is fixedly connected to the inner side of the roller (71). A guide mechanism (75) is fixedly connected to the side of the inner cavity of the cold water tank (74) near the roller (71). The cold water pipe (77) is U-shaped. One end of the cold water pipe (77) is fixedly connected to a water inlet mechanism (76), and the other end of the cold water pipe (77) is fixedly connected to a water outlet mechanism (78). Heat dissipation ducts (79) are provided on both sides of the roller (71) near the cold water pipe (77). The side of the cold water tank (74) is rotatably connected to the inner side of the support frame (6).

2. The coating device for processing composite plastic woven bags according to claim 1, characterized in that: The air-cooling mechanism (73) includes a guide shaft (731). The middle part of one end of the guide shaft (731) is fixedly connected to the output end of the drive component (72) via a drive shaft. The other end of the guide shaft (731) is fixedly connected to an air-cooling housing (734). Both sides of the inner cavity of the air-cooling housing (734) are fixedly connected to brackets (735), and a motor (737) is fixedly connected to one bracket (735). A fan blade (736) is rotatably connected between the two brackets (735). The middle part of the fan blade (736) is fixedly connected to the output end of the motor (737). Both ends of the guide shaft (731) are provided with a second annular groove (733). The side of the guide shaft (731) is provided with a first annular groove (732), and the first annular groove (732) and the second annular groove (733) are connected.

3. The coating device for processing composite plastic woven bags according to claim 2, characterized in that: The side of the air guide shaft (731) is rotatably connected to the inner side of the support frame (6), and the end of the air-cooled outer shell (734) away from the air guide shaft (731) is fixedly connected to the inner side of the roller (71).

4. The coating device for processing composite plastic woven bags according to claim 1, characterized in that: The guiding mechanism (75) includes a guiding shell (751), an air inlet slot (754), and an air outlet slot (755). Both sides of the guiding shell (751) have through holes (752). The middle part of the guiding shell (751) has symmetrical clearance slots (753). The air outlet slot (755) is circumferentially opened on the inner side of the cold water tank (74) and the air outlet slot (755) penetrates the inner wall of the cold water tank (74). The air inlet slot (754) is symmetrically opened on both sides of the annular groove in the middle part of the guiding shell (751) that abut against the cold water tank (74).

5. The coating device for processing composite plastic woven bags according to claim 4, characterized in that: The side of the guide housing (751) is fixedly connected to the inside of the cold water tank (74), the through hole (752) is concentrically arranged with the heat dissipation duct (79), and the clearance groove (753) is fixedly connected to the side of the cold water pipe (77).

6. The coating device for processing composite plastic woven bags according to claim 1, characterized in that: The water inlet mechanism (76) includes a baffle (761) and a water inlet pump (762). The output end of the water inlet pump (762) is fixedly connected to the water inlet end of the cold water pipe (77). The side of the baffle (761) is fixedly connected to the inner side of the cold water tank (74). A mesh plate (763) is fixedly connected to the side of the baffle (761). A guide vane (764) is rotatably connected to the side of the mesh plate (763) at the output end of the water inlet pump (762). A telescopic rod (765) is fixedly connected to one end of the guide vane (764). A connecting block (767) is fixedly connected to the other end of the telescopic rod (765). Scrapers (768) are fixedly connected to both sides of the connecting block (767). A connecting spring (766) is sleeved on the telescopic rod (765).

7. The coating device for processing composite plastic woven bags according to claim 6, characterized in that: Both ends of the connecting spring (766) are fixedly connected to both sides of the telescopic rod (765), and the scraper (768) is in contact with the mesh plate (763).

8. The coating device for processing composite plastic woven bags according to claim 7, characterized in that: The water outlet mechanism (78) includes a water outlet pump (781) and a collection box (782). The output end of the water outlet pump (781) is fixedly connected to the water outlet end of the cold water pipe (77). The input end of the water outlet pump (781) is fixedly connected to a filter pipe (783). The inner side of the collection box (782) is fixedly connected to a filter plate (784). The bottom of the inner side of the collection box (782) is fixedly connected to a one-way return pipe (785). The other end of the one-way return pipe (785) is fixedly connected to the inner side of the cold water tank (74).

9. A coating device for processing composite plastic woven bags according to claim 8, characterized in that: The side of the collection box (782) is fixedly connected to the end of the cold water tank (74) away from the roller (4), and the end of the filter tube (783) away from the water pump (781) is fixedly connected to the inside of the collection box (782).

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