Auxiliary blowing structure for a film blowing machine winding device

Abstract

The application relates to an auxiliary blowing structure for a winding device of a film blowing machine, and relates to the technical field of plastic processing equipment.The auxiliary blowing structure comprises a winding roller of a film blowing machine body and a traction roller located in front of the winding roller.The application solves the problems of uneven cooling and residual temperature through a blowing pipe and a gas outlet hole.After the auxiliary blowing assembly is started, the airflow of a gas source enters the blowing pipe through the air inlet pipe.Due to the guidance of the arc surface of the blowing pipe and the uniform distribution of the gas outlet hole, the airflow is smoothly and fully-width covered blown to the film before winding through the gas outlet hole, directly acts on the residual temperature area of the film, effectively dissipates the local residual temperature of the film, avoids the problems of film adhesion and surface wrinkle caused by the difficulty in dissipating the interlayer residual temperature during winding, significantly improves the flatness of the film winding, guarantees the product quality, and solves the defects of the prior art, i.e., "limited coverage range of the nozzle and uneven local cooling".The problems of fixed blowing angle are solved through the installation of a mounting bracket, a limiting block, a threaded hole, a threaded rod and a rotating limiting plate.

Description

Technical Field

[0001] This application relates to the field of plastic processing equipment technology, and in particular to an auxiliary air blowing structure for a blown film machine winding device. Background Technology

[0002] As the core equipment in plastic film production, the blown film machine's workflow mainly involves heating and melting plastic particles, filtering them through the die head, extruding them through the die head, cooling them through the air ring, inflating them, and finally guiding them with a herringbone frame and conveying them to the winding device to complete the film winding. In actual production, although the surface temperature of the film decreases after initial cooling by the air ring, residual heat can still easily remain in some areas during the conveying process to the winding device. Especially in the winding stage, where the film is in a stacked state, the residual heat is difficult to dissipate quickly, which can easily lead to interlayer adhesion, decreased winding flatness, and even problems such as wrinkles and damage on the film surface, affecting product quality. In existing technologies, some blown film machine winding devices include simple air-blowing components, such as single or multiple dispersed nozzles, to assist in cooling the film. However, such structures have significant drawbacks: First, the nozzle coverage is limited and cannot be adapted to the film width, easily leading to uneven cooling and residual heat in certain areas; second, the air-blowing direction and angle are fixed, making it difficult to adjust according to film thickness, conveying speed, and other operating conditions, resulting in poor versatility; third, the lack of a stable installation and protection structure makes the air-blowing components susceptible to displacement by external forces, causing the air-blowing position to deviate from the film conveying path, increasing the risk of film breakage and winding misalignment, and failing to meet the requirements for efficient and stable winding. Therefore, this paper provides an auxiliary air-blowing structure for blown film machine winding devices. Utility Model Content

[0003] The purpose of this application is to provide an auxiliary air blowing structure for the winding device of a blown film machine, which has the characteristics of solving the problems of uneven cooling and residual heat, solving the problem of poor versatility of fixed air blowing angle, and solving the problem of air blowing components being easily interfered with by external forces.

[0004] The auxiliary air blowing structure for a blown film machine winding device provided in this application adopts the following technical solution: it includes a winding roller of the blown film machine body, a traction roller located in front of the winding roller, and an auxiliary air blowing assembly; the auxiliary air blowing assembly includes an air blowing pipe, an air inlet pipe, and an air source; the air blowing pipe is arranged between the traction roller and the winding roller along the film conveying direction, and the length of the air blowing pipe is adapted to the width of the film produced by the blown film machine; a plurality of air outlets are opened on the side of the air blowing pipe facing the film, and the plurality of air outlets are evenly spaced along the length direction of the air blowing pipe; a support frame is fixedly connected to the right side of the blown film machine body, and the air source is fixedly connected to the upper end of the support frame; one end of the air inlet pipe is connected to the air source, and the other end is connected to the pipe body of the air blowing pipe, and a valve for controlling the air flow is provided on the air inlet pipe; By adopting the above technical solution, the air blowing pipe of the auxiliary blowing component is located between the traction roller and the winding roller along the film conveying direction, and its length is adapted to the width of the film. With the air outlet holes evenly spaced on one side of the film, it can achieve full-width coverage air blowing on the film before winding, effectively dissipating local residual heat of the film. This solves the defects of existing technology such as "limited nozzle coverage and uneven local cooling", avoids the problems of adhesion and wrinkles caused by interlayer residual heat during film winding, and improves winding flatness and product quality. The support frame fixed on the right side of the blown film machine body provides a stable mounting carrier for the air source, preventing the air source from being placed in a scattered manner and easily subject to vibration or external force displacement, and ensuring a stable air supply to the air inlet pipe. The valve on the air inlet pipe can flexibly control the air flow, making it easy to adjust the auxiliary blowing function according to the production start and stop requirements, and improving the ease of operation.

[0005] Preferably, it also includes a mounting bracket; one end of the mounting bracket is detachably connected to the frame of the blown film machine body, and the blown pipe is set on the upper end of the mounting bracket; the mounting bracket is provided with a limiting block, and the front end of the mounting bracket is provided with a threaded hole, and a threaded rod is threadedly connected inside the threaded hole. A rotating limiting plate is fixedly connected to the front end of the threaded rod. The limiting block and the rotating limiting plate are used to adjust the blowing angle between the blown pipe and the film and then fix it.

[0006] By adopting the above technical solution, one end of the mounting bracket is detachably connected to the main frame of the blown film machine, which facilitates the installation, disassembly, and maintenance of the auxiliary blowing structure, and provides stable support for it through the blowing pipe at the upper end. With the help of the limiting block, threaded hole, threaded rod, and rotating limiting plate on the mounting bracket, the rotating limiting plate is moved by the threaded rod screwing in and out of the threaded hole. With the help of the limiting block, the blowing angle between the blowing pipe and the film can be flexibly adjusted. Moreover, the self-locking performance of the threaded connection fixes the adjusted angle, which solves the problem of "fixed blowing angle and poor versatility" in the existing technology, and adapts to film production conditions with different thicknesses and conveying speeds. The integrated design of the mounting bracket makes the blowing pipe and angle adjustment components form a whole, reducing the risk of displacement caused by the assembly of scattered components and improving structural stability.

[0007] Preferably, the diameter of the plurality of air outlets is the same, and the spacing between two adjacent air outlets is kept uniform along the length of the blower pipe; the side of the blower pipe facing the film is an arc-shaped surface, and the plurality of air outlets are all opened on the arc-shaped surface of the blower pipe.

[0008] By adopting the above technical solution, the air outlets have the same diameter and are evenly spaced along the length of the air blower, which can ensure that the airflow intensity output by the air blower is consistent along the width of the film, avoiding uneven cooling caused by excessively strong or weak local airflow. The side of the air blower facing the film is arc-shaped, and the air outlets are opened on this arc-shaped surface, which can optimize the airflow direction, make the airflow fit the film surface better, improve the efficiency of residual heat dissipation, further reduce quality problems during film winding, and enhance the auxiliary cooling effect.

[0009] Preferably, the air blower is made of high-temperature resistant metal or high-temperature resistant engineering plastic.

[0010] By adopting the above technical solutions, the blower tube is made of high-temperature resistant metal or high-temperature resistant engineering plastic material, which can withstand the residual heat before the film is rolled up, avoiding deformation and aging of the blower tube due to long-term contact with the residual heat of the film, ensuring the structural stability and service life of the blower tube, and preventing the material from releasing harmful substances when heated to contaminate the film, ensuring that the product quality meets production requirements.

[0011] Preferably, the auxiliary air blowing assembly further includes an airflow distributor and is fixedly connected to the right end of the mounting bracket; the airflow distributor is disposed between the air inlet pipe and the blowing pipe, and the input end of the airflow distributor is connected to the air inlet pipe, and the output end is rotatably and sealed to the right end of the blowing pipe; the airflow distributor is used to evenly distribute the airflow input from the air inlet pipe to both ends of the blowing pipe.

[0012] By adopting the above technical solution, the airflow distributor is fixed to the right end of the mounting bracket and set close to the blower pipe. This reduces the loss of airflow delivered from the inlet pipe to the blower pipe and evenly distributes the airflow input from the inlet pipe to both ends of the blower pipe, solving the problem of uneven airflow at both ends of the blower pipe due to its length and ensuring consistent cooling effect across the entire width of the film. The output end of the airflow distributor is rotatably and sealed to the right end of the blower pipe, which does not affect the blowing angle adjustment function of the blower pipe and prevents airflow leakage from the connection point, ensuring that all airflow is used for auxiliary cooling and improving airflow utilization and cooling reliability.

[0013] Preferably, it also includes a protective component; the protective component includes a protective cover, which is fitted over the outside of the blower pipe, and the protective cover has an opening on the side facing the film, the size of which is adapted to the distribution range of the air outlets on the blower pipe; the protective cover is fixedly connected to the mounting bracket.

[0014] By adopting the above technical solution, the protective cover is fitted over the outside of the blower pipe, which can prevent foreign objects in the production environment from impacting the blower pipe or blocking the air outlet, thus avoiding airflow interruption or uneven cooling caused by deformation of the blower pipe due to external impact or blockage of the air outlet, and reducing the probability of film damage. The opening size of the protective cover facing the film is adapted to the distribution range of the air outlet, so as to achieve the protection function without blocking the airflow output of the air outlet, ensuring the normal operation of the auxiliary cooling function, and taking into account both protection and practicality. The protective cover is fixedly connected to the mounting bracket, forming an integral structure with the blower pipe and the mounting bracket, further improving the assembly stability of the components and reducing the risk of structural displacement caused by external interference.

[0015] Preferably, the air inlet pipe is further provided with a flow regulating valve; the flow regulating valve is located between the valve and the blower pipe and is used to regulate the airflow rate entering the blower pipe.

[0016] By adopting the above technical solution, the flow regulating valve on the air inlet pipe is located between the valve and the air blowing pipe. It can flexibly adjust the airflow into the air blowing pipe according to the residual temperature of the film, avoiding problems such as the film drifting and misalignment during transport due to excessive airflow, or insufficient cooling due to insufficient airflow. The flow regulating valve works in conjunction with the valve to form a dual airflow control of "on / off control + flow regulation", making the auxiliary blowing function more adaptable to diverse production conditions, improving the structure's adaptability to the production of films of different specifications, and further ensuring winding stability and product quality.

[0017] Preferably, a positioning element is provided between the mounting bracket and the frame of the blown film machine body; the positioning element is a positioning pin or a positioning bolt, used to fix the relative position of the mounting bracket and the frame to prevent the blown pipe from shifting during operation.

[0018] By adopting the above technical solution, the positioning component between the mounting bracket and the blown film machine frame can fix the relative position of the mounting bracket and the frame, preventing the mounting bracket from shifting due to equipment vibration during the operation of the blown film machine, thereby avoiding the displacement of the air pipe with the mounting bracket and the deviation of the air blowing position from the film conveying path.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. This auxiliary air blowing structure for a blown film machine winding device solves the problems of uneven cooling and residual heat through the air blowing pipe and air outlet. After the auxiliary air blowing component is activated, the airflow from the air source enters the air blowing pipe through the air inlet pipe. Due to the guidance of the curved surface of the air blowing pipe and the uniform distribution of the air outlet, the airflow is smoothly and comprehensively blown onto the film before winding, directly acting on the residual heat area of ​​the film. This effectively dissipates the local residual heat of the film, avoiding film adhesion and surface wrinkles caused by the difficulty in dissipating interlayer residual heat during winding. It significantly improves the flatness of the film winding, ensures product quality, and specifically solves the problems of "limited nozzle coverage and localized cooling" in existing technologies. This design addresses the shortcomings of the existing technology, which suffers from fixed air blowing angles and poor versatility. By installing brackets, limiting blocks, threaded holes, threaded rods, and rotating limiting plates, the design solves these problems. Depending on the film thickness, conveying speed, and other operating conditions, the threaded rod is rotated to screw in or out of the threaded hole, causing the rotating limiting plate to push or loosen the air blowing pipe. Combined with the limiting block's support and limiting of the air blowing pipe, the air blowing angle between the air blowing pipe and the film can be adjusted. After adjustment, the self-locking nature of the threaded connection can fix the angle, enabling flexible adjustment of the air blowing angle to adapt to the production conditions of films of different specifications. This solves the problem of "fixed air blowing angle and poor versatility" in existing technologies and improves the structure's adaptability to diverse production needs.

[0020] 2. This auxiliary air blowing structure for a blown film machine winding device solves the problem of the blown pipe being easily interfered with by external forces through protective components. The protective cover provides physical protection for the blown pipe, preventing foreign objects in the production environment from impacting the blown pipe or blocking the air outlet. At the same time, the opening precisely avoids the distribution range of the air outlet, ensuring that the airflow can be blown normally from the air outlet to the film without affecting the cooling function. This reduces the risk of the blown pipe being deformed due to external impact or the air outlet being blocked, avoids air blowing interruption or uneven cooling due to component damage, reduces the probability of film breakage, and improves the stability of the structure operation. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present application. Figure 2 This is a top view of the structure of this application; Figure 3 This is a schematic diagram of the structure viewed in cross-section from the left side of this application; Figure 4 This is a structural diagram on the right side of this application; Figure 5 This is a partial cross-sectional structural diagram of the mounting bracket for this application.

[0022] In the picture: 1. Take-up roller; 2. Traction roller; 3. Auxiliary air blowing assembly; 301. Air blowing pipe; 302. Air inlet pipe; 303. Air source; 304. Air flow distributor; 4. Air outlet; 5. Support frame; 6. Valve; 7. Mounting bracket; 8. Limit block; 9. Threaded hole; 10. Threaded rod; 11. Rotation limit plate; 12. Protective assembly; 1201. Protective cover; 1202. Opening; 13. Flow regulating valve; 14. Positioning component. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.

[0024] Example 1: An auxiliary air blowing structure for a blown film machine winding device, referring to... Figure 1 , Figure 2 and Figure 4 The blown film machine body includes a take-up roller 1, a traction roller 2 located in front of the take-up roller 1, and an auxiliary air blowing assembly 3. The auxiliary air blowing assembly 3 includes an air blowing pipe 301, an air inlet pipe 302, and an air source 303. The air blowing pipe 301 is arranged between the traction roller 2 and the take-up roller 1 along the film conveying direction, and the length of the air blowing pipe 301 is adapted to the width of the film produced by the blown film machine. Several air outlets 4 are opened on the side of the air blowing pipe 301 facing the film, and the several air outlets 4 are evenly spaced along the length of the air blowing pipe 301. A support frame 5 is fixedly connected to the right side of the blown film machine body, and the air source 303 is fixedly connected to the upper end of the support frame 5. One end of the air inlet pipe 302 is connected to the air source 303, and the other end is connected to the pipe body of the air blowing pipe 301. The air inlet pipe 302 is equipped with a valve 6 for controlling the air flow. 01, located between the traction roller 2 and the take-up roller 1 along the film conveying direction and with a length adapted to the film width, along with the air outlets 4 evenly spaced on one side of the blown film pipe 301, can achieve full-width coverage of the film before take-up, effectively dissipating local residual heat of the film, solving the defects of existing technology such as "limited nozzle coverage and uneven local cooling", avoiding adhesion and wrinkling problems caused by interlayer residual heat during film take-up, improving take-up flatness and product quality. The support frame 5 fixed on the right side of the blown film machine body provides a stable mounting carrier for the air source 303, preventing the air source 303 from being easily vibrated or shifted by external forces when placed haphazardly, ensuring a stable air supply from the air source 303 to the air inlet pipe 302; the valve 6 on the air inlet pipe 302 can flexibly control the air flow, making it easy to adjust the auxiliary blowing function according to the production start-up and shutdown requirements, improving the ease of operation.

[0025] Reference Figure 1 , Figure 3 and Figure 5It also includes a mounting bracket 7; one end of the mounting bracket 7 is detachably connected to the frame of the blown film machine body, and the blown pipe 301 is set on the upper end of the mounting bracket 7; the mounting bracket 7 is provided with a limiting block 8, and the front end of the mounting bracket 7 is provided with a threaded hole 9, and a threaded rod 10 is threadedly connected inside the threaded hole 9. The front end of the threaded rod 10 is fixedly connected to a rotating limiting plate 11. The limiting block 8 and the rotating limiting plate 11 are used to adjust the blowing angle between the blown pipe 301 and the film and then fix it. The diameters of the several air outlets 4 are consistent and are relatively uniform. The spacing between two adjacent air outlets 4 is uniform along the length of the blowing pipe 301; the side of the blowing pipe 301 facing the film is arc-shaped, and several air outlets 4 are opened on the arc-shaped surface of the blowing pipe 301. One end of the mounting bracket 7 is detachably connected to the frame of the blown film machine, which facilitates the installation, disassembly, and maintenance of the auxiliary blowing structure, and provides stable support for it through the blowing pipe 301 at the upper end; with the help of the limiting block 8, threaded hole 9, threaded rod 10, and rotating limiting plate 11 on the mounting bracket 7, the film can be connected to the film blowing machine frame. The screwing in and out of the threaded rod 10 within the threaded hole 9 drives the rotating limiting plate 11 to move. Combined with the limiting block 8, the blowing angle between the air pipe 301 and the film can be flexibly adjusted. The self-locking performance of the threaded connection fixes the adjusted angle, solving the problem of "fixed blowing angle and poor versatility" in existing technologies. This adapts to film production conditions with different thicknesses and conveying speeds. The integrated design of the mounting bracket 7 makes the air pipe 301 and angle adjustment components a whole, reducing the risk of misalignment caused by scattered assembly and improving structural stability. The consistent diameter and uniform spacing of the several air outlets 4 along the length of the air pipe 301 ensure that the airflow intensity output by the air pipe 301 remains consistent along the width of the film, avoiding uneven cooling caused by excessively strong or weak local airflow. The side of the air pipe 301 facing the film is curved, and the air outlets 4 are located on this curved surface, optimizing the airflow direction and making the airflow more closely adhere to the film surface, improving residual heat dissipation efficiency, further reducing quality problems during film winding, and enhancing the auxiliary cooling effect.

[0026] Reference Figure 1 , Figure 2 and Figure 3The blowing pipe 301 is made of high-temperature resistant metal or high-temperature resistant engineering plastic. The auxiliary blowing assembly 3 also includes an airflow distributor 304, which is fixedly connected to the right end of the mounting bracket 7. The airflow distributor 304 is located between the air inlet pipe 302 and the blowing pipe 301, with its input end connected to the air inlet pipe 302 and its output end rotatably and sealed to the right end of the blowing pipe 301. The airflow distributor 304 is used to evenly distribute the airflow input from the air inlet pipe 302 to both ends of the blowing pipe 301. The blowing pipe 301 is made of high-temperature resistant metal or high-temperature resistant engineering plastic, which can withstand the residual heat before the film is wound up, preventing the blowing pipe 301 from deforming or aging due to long-term contact with the residual heat film, and ensuring the structural stability and usability of the blowing pipe 301. To extend the product's lifespan and prevent the release of harmful substances from the material when heated, thus contaminating the film and ensuring product quality meets production requirements, the airflow distributor 304 is fixed to the right end of the mounting bracket 7 and positioned close to the air duct 301. This reduces the loss of airflow delivered from the inlet pipe 302 to the air duct 301 and evenly distributes the airflow input from the inlet pipe 302 to both ends of the air duct 301, solving the problem of uneven airflow at both ends of the air duct 301 due to its length, and ensuring consistent cooling effect across the entire width of the film. The output end of the airflow distributor 304 is rotatably and sealed to the right end of the air duct 301, which does not affect the air blowing angle adjustment function of the air duct 301 and prevents airflow leakage from the connection point, ensuring that all airflow is used for auxiliary cooling, improving airflow utilization and cooling reliability.

[0027] Reference Figure 1 , Figure 2 and Figure 3It also includes a protective component 12; the protective component 12 includes a protective cover 1201, which is fitted onto the outside of the blower pipe 301, and the protective cover 1201 has an opening 1202 on the side facing the film, the size of which is adapted to the distribution range of the air outlets 4 on the blower pipe 301; the protective cover 1201 is fixedly connected to the mounting bracket 7, and the air inlet pipe 302 is also provided with a flow regulating valve 13; the flow regulating valve 13 is located between the valve 6 and the blower pipe 301, and is used to regulate the airflow rate entering the blower pipe 301, and the mounting bracket 7 is connected to the frame of the blower machine body. A positioning element 14 is provided; the positioning element 14 is a positioning pin or positioning bolt, used to fix the relative position of the mounting bracket 7 and the frame, preventing the air pipe 301 from shifting during operation. The protective cover 1201 is sleeved on the outside of the air pipe 301, which can prevent foreign objects in the production environment from impacting the air pipe 301 or blocking the air outlet 4, avoiding air interruption or uneven cooling caused by deformation of the air pipe 301 due to external impact or blockage of the air outlet 4, and reducing the probability of film damage. The size of the opening 1202 of the protective cover 1201 facing the film is adapted to the distribution range of the air outlet 4, so as to achieve the protective function at the same time. The airflow output of the vent 4 is not obstructed, ensuring the normal operation of the auxiliary cooling function, balancing protection and practicality. The protective cover 1201 is fixedly connected to the mounting bracket 7, forming an integral structure with the air pipe 301 and the mounting bracket 7, further improving the assembly stability of the components and reducing the risk of structural displacement caused by external interference. The flow regulating valve 13 on the air inlet pipe 302 is located between the valve 6 and the air pipe 301, and can flexibly adjust the airflow entering the air pipe 301 according to the residual temperature of the film, avoiding excessive airflow causing the film to drift or misalign during transport, or insufficient airflow causing the film to drift or misalign during winding. To address the issue of insufficient cooling, the flow regulating valve 13 works in conjunction with the valve 6 to form a dual airflow control system of "on / off control + flow regulation," making the auxiliary blowing function more adaptable to diverse production conditions, improving the structure's adaptability to the production of films of different specifications, and further ensuring winding stability and product quality. The positioning component 14 between the mounting bracket 7 and the blown film machine frame can fix the relative position of the mounting bracket 7 and the frame, preventing the mounting bracket 7 from shifting due to equipment vibration during the operation of the blown film machine, thereby preventing the blowing pipe 301 from shifting with the mounting bracket 7 and the blowing position from deviating from the film conveying path.

[0028] In this embodiment, the problems of uneven cooling and residual heat are solved by using the air blowing pipe 301 and the air outlet 4. After the auxiliary air blowing component 3 is started, the airflow from the air source 303 enters the air blowing pipe 301 through the air inlet pipe 302. Due to the guidance of the arc-shaped surface of the air blowing pipe 301 and the uniform distribution of the air outlet 4, the airflow is blown smoothly and in full width from the air outlet 4 onto the film before winding, directly acting on the residual heat area of ​​the film, effectively dissipating the local residual heat of the film, avoiding the problems of film adhesion and surface wrinkles caused by the difficulty in dissipating the interlayer residual heat during winding, significantly improving the flatness of film winding, ensuring product quality, and specifically solving the defects of the existing technology of "limited nozzle coverage and uneven local cooling"; through The mounting bracket 7, limiting block 8, threaded hole 9, threaded rod 10, and rotating limiting plate 11 solve the problems of fixed air blowing angle and poor versatility. According to the working conditions such as film thickness and conveying speed, the threaded rod 10 is rotated to screw in or out of the threaded hole 9, which drives the rotating limiting plate 11 to push or loosen the air blowing pipe 301. Combined with the limiting block 8 supporting and limiting the air blowing pipe 301, the air blowing angle between the air blowing pipe 301 and the film can be adjusted. After the adjustment, the self-locking property of the threaded connection can fix the angle, realizing flexible adjustment of the air blowing angle, adapting to the production conditions of films of different specifications, solving the problem of "fixed air blowing angle and poor versatility" in the existing technology, and improving the adaptability of the structure to diverse production needs.

[0029] The implementation principle of this application embodiment is as follows: First, the air source 303 is stably installed through the support frame 5 fixed on the right side of the blown film machine body, preventing the air source 303 from shifting due to equipment vibration or external force. When the blown film machine enters the winding process and requires auxiliary cooling of the film, the valve 6 on the air inlet pipe 302 is opened to control the airflow from the air source 303 into the air inlet pipe 302, realizing the initial on / off control of the airflow; when the airflow is delivered through the air inlet pipe 302, the flow regulating valve 13 located between the valve 6 and the blown pipe 301 can adjust the opening degree according to the actual working conditions of the film, control the airflow rate entering the subsequent pipeline, and ensure that the airflow intensity is suitable for the current cooling requirements. Subsequently, the airflow enters the airflow distributor 304 fixed to the right end of the mounting bracket 7. After being processed by the internal structure of the airflow distributor 304, the airflow is evenly distributed and then delivered from its output end to the right end of the blower pipe 301. Because the output end of the airflow distributor 304 and the right end of the blower pipe 301 are connected by a rotational seal, the two can rotate relative to each other when the angle of the blower pipe 301 is adjusted, which does not hinder the angle adjustment and ensures that there is no airflow leakage. The evenly distributed airflow enters the interior of the blower pipe 301, and the blower pipe 301 flows along the membrane. The conveying direction is located between the traction roller 2 and the take-up roller 1, and its length is adapted to the width of the film. Since the side of the blower pipe 301 facing the film is an arc-shaped surface, and several air outlets 4 with the same diameter are evenly spaced along the length of the blower pipe 301 on the arc-shaped surface, the airflow is guided by the arc-shaped surface and blown smoothly and in full width from the air outlets 4 onto the film being conveyed. This directly acts on the residual heat area before the film is wound up, achieving rapid dissipation of local residual heat in the film and laying the foundation for the smooth winding up of the subsequent take-up roller 1. Meanwhile, the blower tube 301 is made of high-temperature resistant metal or high-temperature resistant engineering plastic, which can withstand the residual heat of the film and avoid its own deformation due to temperature affecting the blowing effect. If it is necessary to adjust the blowing angle according to the film specifications, it can be operated through the adjustment structure on the mounting bracket 7: one end of the mounting bracket 7 is detachably connected to the frame of the blown film machine, and the blower tube 301 is located on the upper end of the mounting bracket 7; rotate the threaded rod 10 so that it screws in or out of the threaded hole 9 at the front end of the mounting bracket 7, which drives the rotation limit plate 11 at the front end of the threaded rod 10 to move synchronously, and cooperates with the limit block 8 on the mounting bracket 7 to support and limit the blower tube 301, pushing or finely adjusting the tilt angle of the blower tube 301; after the angle is adjusted to the appropriate working condition, the thread self-locking property of the threaded rod 10 and the threaded hole 9 is used to fix the angle of the blower tube 301 together with the limit block 8 and the rotation limit plate 11 to prevent it from shifting.In addition, a positioning component 14 is provided between the mounting bracket 7 and the blown film machine frame to further fix the relative position of the mounting bracket 7 and the frame, preventing the vibration of the blown film machine from causing the mounting bracket 7 and the blown pipe 301 to shift, and ensuring that the blowing position is always aligned with the film conveying path. During the entire operation, the protective component 12 sleeved on the outside of the blown pipe 301 continues to play a role: the protective cover 1201 is fixedly connected to the mounting bracket 7, forming physical protection for the blown pipe 301, preventing foreign objects in the production environment from hitting the blown pipe 301 or blocking the air outlet 4; at the same time, the opening 1202 of the protective cover 1201 facing the film side is adapted to the distribution range of the air outlet 4 on the blown pipe 301, which can accurately avoid the air outlet 4, ensuring that the airflow can be blown normally from the air outlet 4 to the film without interfering with the cooling function.

Claims

1. An auxiliary air blowing structure for a blown film machine winding device, comprising a winding roller (1) of the blown film machine body and a traction roller (2) located in front of the winding roller (1), characterized in that, It also includes an auxiliary air blowing assembly (3); the auxiliary air blowing assembly (3) includes an air blowing pipe (301), an air inlet pipe (302) and an air source (303); the air blowing pipe (301) is arranged between the traction roller (2) and the winding roller (1) along the film conveying direction, and the length of the air blowing pipe (301) is adapted to the width of the film produced by the blown film machine; the air blowing pipe (301) has a plurality of air outlets (4) on the side facing the film, and the plurality of air outlets (4) are evenly spaced along the length of the air blowing pipe (301); a support frame (5) is fixedly connected to the right side of the blown film machine body, and the air source (303) is fixedly connected to the upper end of the support frame (5); one end of the air inlet pipe (302) is connected to the air source (303), and the other end is connected to the pipe body of the air blowing pipe (301), and a valve (6) for controlling the air flow is provided on the air inlet pipe (302).

2. The auxiliary air blowing structure for a blown film machine winding device according to claim 1, characterized in that, It also includes a mounting bracket (7); one end of the mounting bracket (7) is detachably connected to the frame of the blown film machine body, and the blown pipe (301) is set on the upper end of the mounting bracket (7); the mounting bracket (7) is provided with a limiting block (8), and the front end of the mounting bracket (7) is provided with a threaded hole (9), and a threaded rod (10) is threadedly connected inside the threaded hole (9), and a rotating limiting plate (11) is fixedly connected to the front end of the threaded rod (10). The limiting block (8) and the rotating limiting plate (11) are used to adjust the blowing angle between the blown pipe (301) and the film and then fix it.

3. The auxiliary air blowing structure for a blown film machine winding device according to claim 1, characterized in that: The diameter of the several air outlets (4) is the same, and the spacing between two adjacent air outlets (4) is uniform along the length of the blower pipe (301); the side of the blower pipe (301) facing the film is an arc-shaped surface, and the several air outlets (4) are all opened on the arc-shaped surface of the blower pipe (301).

4. The auxiliary air blowing structure for a blown film machine winding device according to claim 1, characterized in that: The air blower (301) is made of high-temperature resistant metal or high-temperature resistant engineering plastic.

5. The auxiliary air blowing structure for a blown film machine winding device according to claim 2, characterized in that: The auxiliary air blowing assembly (3) also includes an airflow distributor (304) and is fixedly connected to the right end of the mounting bracket (7); the airflow distributor (304) is located between the air inlet pipe (302) and the air blowing pipe (301), and the input end of the airflow distributor (304) is connected to the air inlet pipe (302), and the output end is rotatably and sealed to the right end of the air blowing pipe (301); the airflow distributor (304) is used to evenly distribute the airflow input from the air inlet pipe (302) to both ends of the air blowing pipe (301).

6. The auxiliary air blowing structure for a blown film machine winding device according to claim 2, characterized in that, It also includes a protective component (12); the protective component (12) includes a protective cover (1201), the protective cover (1201) is sleeved on the outside of the blower pipe (301), and the protective cover (1201) has an opening (1202) on the side facing the film, the size of the opening (1202) is adapted to the distribution range of the air outlet (4) on the blower pipe (301); the protective cover (1201) is fixedly connected to the mounting bracket (7).

7. The auxiliary air blowing structure for a blown film machine winding device according to claim 1, characterized in that: The air inlet pipe (302) is also provided with a flow regulating valve (13); the flow regulating valve (13) is located between the valve (6) and the air blowing pipe (301) and is used to regulate the airflow rate entering the air blowing pipe (301).

8. The auxiliary air blowing structure for a blown film machine winding device according to claim 2, characterized in that: A positioning element (14) is provided between the mounting bracket (7) and the frame of the blown film machine body; the positioning element (14) is a positioning pin or a positioning bolt, used to fix the relative position of the mounting bracket (7) and the frame, and to prevent the blown pipe (301) from shifting during operation.

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