Polyester film production equipment

Abstract

This utility model discloses a polyester film production apparatus, relating to the technical field of film material production equipment. The apparatus includes a frame, a winding module, a cutting module, a heating module, a cooling module, and an intelligent module. The frame has a biaxial stretching zone and a winding zone, corresponding to the biaxial stretching module and the winding module. The cutting module is located on the side of the biaxial stretching zone away from the winding zone. The speed-regulating roller module contains multiple speed-regulating rollers to adjust the conveying speed. The heating module heats the material before the biaxial stretching zone, and the cooling module cools the material between the winding zone and the biaxial stretching zone. The intelligent module is electrically connected to all modules and can adjust the winding speed, conveying speed, etc., offering multiple speed modes with corresponding winding, conveying, heating, and cooling speeds to achieve efficient production. The technical solution provided by this utility model allows for the switching of production parameters by changing the speed module, enabling the rapid production of polyester films with different physical parameters without stopping the machine.

Description

Technical Field

[0001] This utility model relates to the technical field of film material production equipment, and in particular to a polyester film production apparatus. Background Technology

[0002] Polyester film has a wide range of applications in modern society, covering many important fields such as optics, electronics, and packaging.

[0003] In existing polyester film production processes, the production equipment typically has certain limitations. On the one hand, traditional production equipment struggles to flexibly adjust production parameters to meet the production requirements of different batches of polyester film. Furthermore, when facing small-batch demands from customers for polyester films with varying physical parameters, adjusting the production parameters takes considerable time and requires equipment shutdown, resulting in significant waste of polyester materials. Utility Model Content

[0004] The main objective of this invention is to provide a polyester film production apparatus that can solve at least one of the aforementioned problems.

[0005] To achieve the above objectives, the present invention provides a polyester film production apparatus comprising:

[0006] A frame, wherein a biaxial stretching zone and a winding zone are arranged sequentially on the frame, a biaxial stretching module is located in the biaxial stretching zone, and a winding module is located in the winding zone;

[0007] The speed-regulating roller module includes multiple speed-regulating rollers respectively disposed in the biaxial stretching zone and the winding zone, for adjusting the conveying speed of the film material on the frame;

[0008] A heating module is located before the biaxial stretching zone to raise the temperature of the film material;

[0009] A cooling module is located between the winding area and the biaxial stretching area to reduce the temperature of the film material;

[0010] The intelligent module is electrically connected to the winding module, the biaxial stretching module, the speed regulating roller module, the heating module, and the cooling module, and is used to adjust the production speed of the polyester film with one key. It can adjust the winding speed of the winding module and the conveying speed of the film material by the speed regulating roller module. The intelligent module can also coordinate the heating module and the cooling module with the speed regulating roller module to adjust the heating and cooling rates of the film material. The intelligent module includes multiple speed modes that can be switched between each other. Each speed mode includes a corresponding winding speed, conveying speed, heating speed, and cooling speed.

[0011] In one embodiment, the heating module includes at least two stages of heat treatment components, wherein the heating power of the next stage heat treatment component is greater than that of the previous stage heat treatment component, so as to enable the film material to be heated in a gradient manner.

[0012] In one embodiment, the cooling module includes at least two stages of cooling components, wherein the cooling power of the next stage of cooling components is greater than that of the previous stage of cooling components, so as to enable the film material to be cooled in a gradient.

[0013] In one embodiment, the heat treatment assembly includes an infrared heating assembly, which includes a plurality of infrared heating lamps evenly arranged along the conveying direction of the film material. The subsequent heat treatment assembly includes the infrared heating assembly and a hot air circulation assembly. The hot air circulation assembly includes a circulating fan and a heating element disposed within the circulating fan. The air inlet and air outlet of the circulating fan are both oriented towards the film material.

[0014] In one embodiment, the heating power of the infrared heating lamp in the next-level heat treatment assembly is greater than that of the infrared heating lamp in the previous-level heat treatment assembly.

[0015] In one embodiment, the heat treatment component of the last stage further includes a first temperature sensing component, which includes a plurality of temperature sensors disposed close to the infrared heating lamp and corresponding one-to-one with the infrared heating lamp. The first temperature sensing component is electrically connected to the intelligent module.

[0016] In one embodiment, the first-stage cooling assembly includes at least two air coolers, which are located below the film material and arranged along the extension direction of the film, with the air outlets of the air coolers facing the film material; the subsequent-stage cooling assembly includes the air coolers and at least two cooling water roller groups, each group including two cooling water rollers that clamp the film material from the upper and lower sides.

[0017] In one embodiment, the cooling module further includes a second temperature sensing component disposed on the rack. The second temperature sensing component includes a plurality of temperature sensors, which are disposed close to the cooling components and correspond one-to-one with the multiple cooling components. The second temperature sensing component is electrically connected to the intelligent module.

[0018] In one embodiment, the biaxial stretching module includes a longitudinal stretching component, a transverse stretching component, and an intermediate cooling component disposed between the longitudinal stretching component and the transverse stretching component, the intermediate cooling component being used to cool the film material.

[0019] In one embodiment, the longitudinal stretching assembly includes a longitudinal stretching roller group and a speed regulating device. The longitudinal stretching roller group includes an active roller group and a driven roller group spaced apart along the stretching direction of the film material. The speed regulating device is rotatably connected to the active roller group and electrically connected to the intelligent module.

[0020] In one embodiment, the transverse stretching assembly includes a transverse stretching member and a heating member. The transverse stretching member is used to stretch the film material laterally, and the heating member is used to heat the film material and reduce the temperature variation range of the film material.

[0021] In one embodiment, the speed regulating roller module further includes a tension buffer roller group, which is disposed between the longitudinal stretching component and the transverse stretching component. The tension buffer roller group includes a roller that abuts against the film material, a bracket for supporting the roller, and a tension sensor mounted on the bracket. Multiple rollers are provided. The bracket is rotatably connected to the frame through an adjustment drive, and the tension sensor, the adjustment drive, and the intelligent module are electrically connected.

[0022] In one embodiment, the frame further includes a feeding area disposed on the side of the biaxial stretching zone away from the winding zone, and the polyester film production apparatus further includes a feeding module, which includes a melt extrusion assembly and a casting assembly. The melt extrusion assembly includes at least one twin-screw extruder capable of uniformly melting and mixing polyester materials, and the casting assembly includes a casting roller assembly and an extrusion die. The extrusion die is used to uniformly extrude the molten material, and the casting roller assembly is used to rapidly cool and shape the molten material.

[0023] In one embodiment, the winding module includes a winding roller assembly and a tension control component installed between the winding roller assembly and the frame, the tension control component being electrically connected to the smart module.

[0024] In one embodiment, the polyester film production apparatus further includes a detection module located between the cooling module and the winding module, which is used to perform quality detection on the film material.

[0025] This invention utilizes an intelligent module design to create multiple switchable speed modes, covering various combinations of winding, conveying, heating, and cooling speeds. This allows the device to flexibly adjust according to film material batches, order quantities, and process parameters, precisely matching production conditions and meeting diverse needs. Furthermore, the polyester film production device can quickly adapt to switching between different production orders; the multiple speed modes, combined with the intelligent module's switching function, enhance the adaptability and flexibility of the production device. Facing the production requirements of polyester films of different thicknesses and widths, it can quickly adjust to the corresponding mode to meet market demands; when process parameters change, such as adjusting the temperature-time curve, it can also flexibly switch modes to ensure the performance of the film material. It should be noted that when the speed mode is changed, the intelligent module controls the cutting module to cut off the material so that the defective film material caused by the changes in conveying speed, heating speed, and cooling speed is wound onto the outermost side of the winding drum of the winding module. That is, the defective film material surrounds the outer side of the film material generated under the original speed module, so that the defective film material can be cut off from the winding drum after winding is completed. This avoids the defective film material being wound onto the inner side of the film material generated by the new speed module, thus preventing the delivery of material containing defective film material to the user. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 A side view of an embodiment of the polyester film production apparatus provided by this utility model;

[0028] Figure 2 for Figure 1 Side view of the feeding module and the cutting module in the illustrated embodiment;

[0029] Figure 3 for Figure 1 Side view of the heating module in the illustrated embodiment;

[0030] Figure 4 for Figure 1 Side view of the longitudinal stretching component in the illustrated embodiment;

[0031] Figure 5 for Figure 1 The side view of the transverse stretching assembly, intermediate cooling assembly, and tension buffer roller assembly in the illustrated embodiment;

[0032] Figure 6 for Figure 1 The side view of the cooling module and the winding module in the embodiment shown;

[0033] Figure 7 for Figure 3 A magnified view of a section at point A in the middle;

[0034] Figure 8 for Figure 1 The diagram shows the structure of the feeding module in the embodiment shown.

[0035] Figure 9 for Figure 1 A schematic diagram of the longitudinal tensioning component in the illustrated embodiment;

[0036] Figure 10 for Figure 1 The diagram shows the structure of the winding module in the implementation.

[0037] Explanation of icon numbers:

[0038] 100. Frame; 11. Biaxial stretching zone; 12. Winding zone; 13. Feeding zone;

[0039] 200. Cutting blade module; 21. Laser cutting head; 22. Support platform; 23. Robotic arm assembly; 24. Cutting drive component;

[0040] 300. Bidirectional stretching module; 31. Longitudinal stretching assembly; 311. Stretching roller assembly; 312. Driven roller assembly; 313. Driven roller assembly; 32. Transverse stretching assembly; 321. Transverse stretching component; 322. Chain clamp assembly; 323. Heating component; 33. Intermediate cooling assembly;

[0041] 400. Rewinding module; 41. Rewinding roller assembly; 42. Tension control assembly;

[0042] 500. Speed ​​regulating roller module; 41. Speed ​​regulating roller; 52. Tension buffer roller group; 521. Roller; 522. Support;

[0043] 600. Heating module; 61. Heat treatment assembly; 61a. First-stage heat treatment assembly; 61b. Second-stage heat treatment assembly; 61c. Third-stage heat treatment assembly; 62. Infrared heating assembly; 621. Infrared heating lamp; 63. Hot air circulation assembly; 631. Circulating fan; 64. First temperature sensing assembly; 641. Temperature sensor;

[0044] 700. Cooling module; 71. Cold treatment assembly; 71a. First-stage cold treatment assembly; 71b. Second-stage cold treatment assembly; 71c. Third-stage cold treatment assembly; 72. Air cooler; 73. Cooling water roller assembly;

[0045] 800. Feeding module; 81. Melt extrusion assembly; 82. Casting assembly; 821. Casting roller assembly; 822. Extrusion die.

[0046] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0048] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0049] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0050] This utility model proposes a production apparatus for polyester film.

[0051] Please see Figures 1 to 10 In one embodiment of this utility model, the polyester film production apparatus includes:

[0052] The frame 100 has a biaxial stretching area 11 and a winding area 12 arranged sequentially on it. The biaxial stretching module 300 is located in the biaxial stretching area 11 and the winding module 400 is located in the winding area 12.

[0053] The speed regulating roller module 500 includes multiple speed regulating rollers 51 respectively disposed in the biaxial stretching zone 11 and the winding zone 12, for adjusting the conveying speed of the film material on the frame 100.

[0054] The heating module 600 is located before the biaxial stretching zone 11 and is used to raise the temperature of the film material;

[0055] A cooling module 700 is located between the winding zone 12 and the biaxial stretching zone 11 to reduce the temperature of the film material.

[0056] The intelligent module is electrically connected to the winding module 400, biaxial stretching module 300, speed regulating roller module 500, heating module 600, and cooling module 700, and is used to adjust the production speed of polyester film with one button. It can adjust the winding speed of the winding module 400 and the conveying speed of the film material by the speed regulating roller module 500. The intelligent module can also make the heating module 600 and cooling module 700 cooperate with the speed regulating roller module 500 to adjust the heating and cooling speed of the film material. The intelligent module includes multiple speed modes that can be switched between each other. Each speed mode includes the corresponding winding speed, conveying speed, heating speed, and cooling speed.

[0057] This invention utilizes an intelligent module design to provide multiple switchable speed modes, covering various combinations of winding, conveying, heating, and cooling speeds. This allows the device to flexibly adjust according to film material batches, order quantities, and process parameters, precisely matching production conditions and meeting diverse needs. Furthermore, the polyester film production device can quickly adapt to different production orders; the multiple speed modes, combined with the intelligent module's switching function, enhance the adaptability and flexibility of the production device. Facing the production requirements of polyester films of different thicknesses and widths, it can quickly adjust to the corresponding mode to meet market demands; when process parameters change, such as adjusting the temperature-time curve, it can also flexibly switch modes to ensure the performance of the film material. It should be noted that when the speed mode is changed, the intelligent module controls the cutter module 200 to cut off the material so that the defective film material caused by the changes in conveying speed, heating speed and cooling speed is wound on the outermost side of the winding drum of the winding module 400. That is, the defective film material surrounds the outer side of the film material generated under the original speed module, so that the defective film material can be cut off from the winding drum after winding is completed. This avoids the defective film material being wound on the inner side of the film material generated by the new speed module, so as to avoid sending material containing defective film material to the user.

[0058] In one embodiment, the heating module 600 includes at least two stages of heat treatment components 61, with the heating power of the next stage heat treatment component 61 being greater than that of the previous stage, enabling a gradient heating of the film material. The cooling module 700 includes at least two stages of cold treatment components 71, with the cooling power of the next stage cold treatment component 71 being greater than that of the previous stage cold treatment component 71, enabling a gradient cooling of the film material. Both the heating module 600 and the cooling module 700 employ a multi-stage component design, with the heating or cooling power of the next stage being greater than that of the previous stage. This structure enables gradient heating and cooling of the film material. For example, in the heating stage, preheating is performed first by a low-power component, followed by rapid heating to the target temperature by a high-power component, avoiding thermal stress generated inside the film material due to sudden temperature changes. Similarly, in the cooling stage, preliminary cooling is performed first by a low-power component, followed by rapid cooling to the required temperature by a high-power component, preventing uneven shrinkage of the film material due to sudden temperature drops, thereby effectively controlling temperature changes of the film material during the production process and improving product quality and performance. The multi-stage heat treatment and cooling components 71 enable rapid heating and cooling of the film material. Before the biaxial stretching zone 11, the film material is rapidly heated to a suitable stretching temperature by the multi-stage heating components of the heating module 600, shortening the heating time. Before the winding zone 12, the multi-stage components of the cooling module 700 quickly cool the film material to a suitable temperature, reducing cooling time. Furthermore, the gradient design of the heating module 600 and cooling module 700, in conjunction with the speed-regulating roller module 500, allows for flexible adjustment of the operating speed and temperature control mode of each module through an intelligent module, enabling the production equipment to adapt to different production needs and improving overall production efficiency. In other embodiments, only a single-stage heat treatment component 61 or cooling component 71 may be provided.

[0059] In one embodiment, the first-stage heat treatment assembly 61a includes an infrared heating assembly 62, which comprises a plurality of infrared heating lamps 621 uniformly arranged along the conveying direction of the film material. The subsequent heat treatment assembly 61 further includes a hot air circulation assembly 63, which includes a circulating fan 631 and heating elements 323 disposed within the circulating fan 631. The air inlet and outlet of the circulating fan 631 are both oriented towards the film material. The heating power of the infrared heating lamps 621 in the next-stage heat treatment assembly 61 is greater than that in the previous-stage heat treatment assembly 61. Furthermore, the subsequent heat treatment assembly 61 employs the hot air circulation assembly 63, which continuously blows the hot air generated by the heating elements 323 towards the film material through the circulating fan 631, further improving heating efficiency and the uniformity of heat distribution, enabling the film material temperature to rise rapidly and uniformly to the required process temperature. This helps improve the physical properties of the film material, such as crystallinity and orientation. Uniform heating can reduce internal stress and defects in the film material, improving its mechanical and optical properties. Simultaneously, the hot air flow of the hot air circulation component 63 can remove volatile impurities from the film material surface, helping to improve its surface quality and purity, thereby enhancing the overall quality of the polyester film and making it more suitable for high-end applications. The combined use of the infrared heating component 62 and the hot air circulation component 63 provides multiple heating methods and power adjustment means for the heating process. The number and power of the infrared heating lamps 621, as well as the wind speed and temperature of the hot air circulation component 63, can be flexibly adjusted according to different process requirements and film material characteristics. For example, in stages requiring rapid heating, both the infrared heating component 62 and the hot air circulation component 63 can be turned on simultaneously, with power and wind speed adjusted to higher levels; in stages requiring precise temperature control, some infrared heating lamps can be turned off, and power and wind speed reduced to achieve precise temperature regulation, meeting various process requirements in polyester film production. In other embodiments, the hot air circulation component 63 may not be included.

[0060] Furthermore, this embodiment includes a three-stage heat treatment assembly 61. The third-stage heat treatment assembly 61c includes a hot air circulation assembly 63 and an infrared heating assembly 62. The heating power of the infrared heating lamps 621 in the third-stage heat treatment assembly 61c is greater than that of the infrared heating lamps 621 in the second-stage heat treatment assembly 61b. The infrared heating assembly 62, through multiple infrared heating lamps 621 evenly arranged along the conveying direction, can quickly and evenly transfer heat to the film material. This arrangement ensures that the film material is heated evenly in all parts during the conveying process, reducing quality problems caused by local overheating or insufficient heating.

[0061] In one embodiment, the final stage heat treatment assembly 61 further includes a first temperature sensing assembly 64, which comprises multiple temperature sensors 641 positioned close to and corresponding one-to-one with the infrared heating lamps 621. The first temperature sensing assembly 64 is electrically connected to the intelligent module. This arrangement enables real-time and accurate monitoring of the film material temperature in the final stage, providing detailed temperature feedback to the intelligent module. Based on this data, the intelligent module precisely adjusts the number and power of the operating infrared heating lamps 621 to ensure uniform heating of the film material during the final stage heat treatment. In polyester film production, the heating conditions required for the film material may change in real time due to batch differences in raw materials, fluctuations in environmental factors, or adjustments in production speed. The first temperature sensing assembly 64 can quickly capture these temperature changes, allowing the intelligent module to dynamically adjust the heating strategy. For example, if a region is detected to be too cold, the intelligent module can quickly increase the power of the corresponding infrared heating lamp 621; if the temperature is too high, the power is reduced. This not only optimizes the heating process and ensures that the film material is always within the optimal process temperature range, but also improves production efficiency and reduces the defect rate caused by temperature deviations. For products requiring extremely high temperature uniformity, such as optical thin film materials and electronic insulating thin film materials, this design effectively avoids inconsistencies in film material performance caused by localized temperature differences, significantly improving product quality. In other embodiments, the first temperature sensing component 64 may be omitted.

[0062] In one embodiment, the first-stage cooling assembly 71a includes at least two air coolers 72, which are positioned below the film material and arranged along the film's extension direction, with their outlets facing the film material. This arrangement allows cooling air to be blown evenly onto the film material, achieving rapid and uniform initial cooling. This effectively prevents uneven shrinkage or deformation of the film material due to excessive local temperature differences during the initial cooling stage, making it particularly suitable for rapidly reducing the film material temperature to an initial cooling state. The second-stage cooling assembly 71b also includes at least two cooling water roller groups 73, each consisting of two cooling water rollers that clamp the film material from both the top and bottom sides, achieving contact cooling. The circulating coolant inside the cooling water rollers efficiently removes heat from the film material, and the clamping mechanism ensures uniform cooling, further improving cooling uniformity and stability, and effectively controlling the dimensional stability and flatness of the film material.

[0063] Furthermore, this embodiment includes a three-stage cooling assembly 71. The third-stage cooling assembly 71c includes at least two air coolers 72 and a cooling water roller assembly 73. The water temperature in the third-stage cooling water roller assembly 73 is lower than the water temperature in the second-stage cooling water roller assembly 73. The combined design of the air coolers 72 and the cooling water roller assembly 73 allows the cooling process to combine the advantages of both air cooling and water cooling, and the cooling strategy can be flexibly adjusted according to different production needs and process requirements. For example, for thinner polyester films, rapid initial cooling can be achieved mainly by relying on the air coolers 72, followed by moderate temperature adjustment by the cooling water roller assembly 73. For thicker polyester films, the high-efficiency cooling capacity of the cooling water roller assembly 73 can be fully utilized to ensure sufficient cooling. In addition, the cooling water roller assembly 73 can also adapt to different cooling requirements by adjusting the temperature and flow rate of the coolant. In other embodiments, the cooling water roller assembly 73 may not be included.

[0064] In one embodiment, the cooling module 700 further includes a second temperature sensing component disposed on the frame 100. The second temperature sensing component includes multiple temperature sensors 641, which are positioned close to the cold treatment component 71 and correspond one-to-one with each of the multi-stage cold treatment components 71. The second temperature sensing component is electrically connected to the intelligent module. It can monitor the temperature of the film material near the cold treatment component 71 in real time and feed the data back to the intelligent module. Based on this data, the intelligent module precisely adjusts the operating parameters of the cold treatment component 71 (such as the wind speed of the air cooler 72, the temperature and flow rate of the coolant in the cooling water roller assembly 73, etc.) to ensure uniform cooling of all parts of the film material during the cooling process. For polyester films, such as optical film materials and electronic insulating film materials, which require extremely high temperature uniformity, this design effectively avoids inconsistent film material performance caused by differences in local cooling rates, significantly improving product quality and performance. Furthermore, during the production of polyester film, the cooling requirements of the film material may change in real time due to batch differences in raw materials, changes in ambient temperature, and adjustments in production speed. The second temperature sensing component can quickly capture these temperature changes, enabling the intelligent module to dynamically adjust the cooling strategy. For example, if a region is detected to be too hot, the intelligent module can quickly increase the cooling intensity of the corresponding cold treatment component 71; if the temperature is too low, it can decrease the cooling intensity. This not only optimizes the cooling process, ensuring that the film material is always within the optimal cooling range, but also improves production efficiency and reduces the defect rate caused by temperature deviations. The real-time monitoring function of the temperature sensor 641 can promptly detect abnormalities in the cooling system, such as abnormal temperature increases or decreases caused by a malfunction of a cold treatment component 71. The intelligent module can respond quickly and take measures (such as adjusting the operating parameters of other cooling components or issuing alarms to maintenance personnel), thereby avoiding production accidents caused by cooling system failures and ensuring the safety and stability of the production process. In other embodiments, a second temperature sensing component may not be provided.

[0065] The multi-stage heat treatment assembly 61 and cold treatment assembly 71 provide a more flexible temperature control method for the production unit. Different heat treatment and cold treatment modes can be selected according to the production requirements of different batches of polyester film, different order quantities, and different process parameters. For example, for thin polyester film, a lower-power heating assembly and a higher-power cooling assembly can be used to achieve rapid heating and cooling; for thick polyester film, a higher-power heating assembly and a multi-stage cooling assembly can be used to ensure uniform heating and cooling of the film material. This flexibility and adaptability enable the production unit to meet diverse production needs.

[0066] In one embodiment, the biaxial stretching module 300 includes a longitudinal stretching component 31, a transverse stretching component 32, and an intermediate cooling component 33 disposed between the longitudinal stretching component 31 and the transverse stretching component 32. The intermediate cooling component 33 is used to cool the film material. During biaxial stretching, longitudinal stretching and transverse stretching respectively impart specific orientations and mechanical properties to the film material. After longitudinal stretching, the molecular chains inside the film material are arranged in an orderly manner along the longitudinal direction, and are in a relatively high energy state. After the intermediate cooling component 33 appropriately cools the film material, the mobility of the molecular chains decreases, and this orderly arrangement is "locked" to a certain extent. The subsequent transverse stretching further orients and arranges the molecular chains in the transverse direction. By first cooling and locking the longitudinal orientation and then performing transverse stretching, the mechanical properties of the film material in both the longitudinal and transverse directions can be made more balanced and stable, improving the overall mechanical properties of the film material. That is, during biaxial stretching, the intermediate cooling component 33 helps to stabilize the temperature conditions during the production process. After longitudinal stretching, the film material temperature is relatively high. If transverse stretching is performed directly without proper cooling, the film material may experience excessive relaxation and uneven thickness due to overheating during the transverse stretching process, affecting product quality and stability. The intermediate cooling component 33 can control the film material temperature within a suitable range, allowing the transverse stretching process to proceed under more stable temperature conditions. This improves the stability of the production process and the consistency of product quality, reducing waste caused by temperature fluctuations. Furthermore, the intermediate cooling component 33 includes an air cooler 72. In other embodiments, the intermediate cooling component 33 may not be included.

[0067] In one embodiment, the longitudinal stretching assembly 31 includes a longitudinal stretching roller group 311 and a speed regulating device. The longitudinal stretching roller group 311 includes an active roller group 312 and a driven roller group 313 spaced apart along the extension direction of the film material. The speed regulating device is rotatably connected to the active roller group 312 and electrically connected to the intelligent module. It can precisely adjust the rotation speed of the active roller group 312 according to the characteristics of the film material and process requirements, thereby controlling the longitudinal stretching ratio. The active roller group 312 can effectively manage the tension of the film material and, together with the driven roller group 313, achieve stable conveying and uniform stretching, avoiding problems such as uneven stretching and inconsistent thickness caused by speed fluctuations, thus improving product quality and performance. In other embodiments, the speed regulating roller group 51 may not be electrically connected to the intelligent module.

[0068] In one embodiment, the lateral stretching assembly 32 includes a lateral stretching member 321 and a heating member 323. The lateral stretching member 321 is used to laterally stretch the film material, and the heating member 323 is used to heat the film material and reduce the temperature variation range of the film material. Specifically, the lateral stretching member 321 can be a chain clamp assembly 322, which includes chain clamps, guide rails, and a driving member. The chain clamps are used to clamp the two edges of the film material and are mounted on the guide rails arranged in a ring. The guide rails provide a guiding path for the chain clamps. Typically, multiple chain clamps are provided on each guide rail to ensure that the film material is subjected to uniform force during lateral stretching. The driving member includes a drive motor and a transmission chain. The drive motor drives the transmission chain to move along the guide rails, thereby moving the chain clamps to achieve lateral stretching of the film material. Furthermore, the transverse stretching assembly 32 also includes an opening and closing clamping assembly, which is respectively installed at the inlet and outlet of the guide rail. The opening clamping assembly is used to open the chain clamp before the film material enters the transverse stretching assembly 32, facilitating the insertion of the edge of the film material into the chain clamp. After the film material enters the transverse stretching assembly 32, the chain clamp closes under the action of its own elastic element. The opening clamping assembly includes an opening clamping block and an opening clamping drive component that is driven to the opening clamping block. The opening clamping drive component can be electrically connected to the intelligent module to move the opening clamping block in a direction closer to or away from the chain clamp. The opening clamping block also includes a guide slope provided on the side of the opening clamping block closer to the chain clamp. The guide slope is inclined towards the side closer to the film material in the conveying direction of the film material so as to abut against the chain clamp and change the chain clamp to the open state. Furthermore, the heating element 323 of the transverse stretching assembly 32 is configured as an infrared heating assembly 62. The infrared heating lamp is located below the film material and is positioned towards the film material.

[0069] In one embodiment, the speed-regulating roller module 500 further includes a tension buffer roller group 52, which is disposed between the longitudinal stretching component 31 and the transverse stretching component 32. The tension buffer roller group 52 includes a roller 521 that abuts against the film material, a bracket 522 for supporting the roller 521, and a tension sensor mounted on the bracket 522. Multiple rollers 521 are provided. The bracket 522 is rotatably connected to the frame 100 via an adjustment drive, and the tension sensor, adjustment drive, and intelligent module are electrically connected. When the heating rate and cooling rate of the film material are inconsistent and cannot be coordinated by changing the power of the heat treatment component 61 and / or the cold treatment component 71, resulting in inconsistent conveying speeds of the film material on the heating module 600 and the cooling module 700, the rollers 521 of the tension buffer roller group 52 can rotate flexibly, forming a buffer zone between the faster and slower speed-regulating rollers 51 to temporarily store excess film material, preventing damage due to sudden speed changes causing slack or excessive tension. Furthermore, the adjustable bracket 522 can rotate at an angle on the frame 100 to change the tension of the film material, ensuring that the film material maintains a suitable tension among different speed-regulating roller groups 51, thus ensuring stable operation. The tension sensor monitors the film material tension in real time and feeds it back to the intelligent control system, automatically adjusting the speed of the speed-regulating roller groups 51 to achieve automatic tension control. Further, the roller 521 can rotate freely around its own axis on the bracket 522 to reduce friction with the film material and prevent damage to the film material. In other embodiments, the roller 521 can be fixed to the bracket 522.

[0070] In one embodiment, the frame 100 further includes a feeding area 13 disposed on the side of the biaxial stretching zone 11 away from the winding zone 12. The polyester film production apparatus also includes a feeding module 800, which includes a melt extrusion assembly 81 and a casting assembly 82. The melt extrusion assembly 81 includes at least one twin-screw extruder capable of uniformly melting and mixing polyester materials. The casting assembly 82 includes a casting roller assembly 821 and an extrusion die 822. The extrusion die 822 is used to uniformly extrude the molten material, and the casting roller assembly 821 is used to rapidly cool and shape the molten material. The twin-screw extruder can uniformly melt and mix polyester materials, avoiding differences in film material properties caused by uneven material mixing. The extrusion die 822 can uniformly extrude the molten material to form a molten film material with uniform thickness. Precise control of the extrusion die 822 ensures that the molten material has good flowability and uniformity when entering the casting roller assembly 821, facilitating rapid cooling and shaping by the casting roller assembly 821 to form a preliminary film material with certain strength and dimensional stability. Rapid cooling not only improves production efficiency but also ensures the dimensional stability and mechanical properties of the film material during subsequent stretching and processing. The feeding module 800 can be flexibly adjusted according to different production needs and process parameters. For example, by adjusting the temperature and speed of the twin-screw extruder, as well as the parameters of the extrusion die 822 and the casting roller assembly 821, it can adapt to the production of polyester films with different thicknesses, widths, and performance requirements. This flexibility allows the production unit to quickly respond to market changes and meet diverse product demands.

[0071] In one embodiment, the winding module 400 includes a winding roller assembly 41 and a tension control component 42 installed between the winding roller assembly 41 and the frame 100. The tension control component 42 is electrically connected to the intelligent module. The tension control component 42 can adjust the speed in real time according to the characteristics of the film material, accurately control the winding tension, ensure winding quality, and avoid loosening or deformation of the film material.

[0072] In one embodiment, the polyester film production apparatus further includes a detection module located between the cooling module 700 and the winding module 400. This module performs real-time quality checks on the film material after cooling and setting but before winding. It can promptly detect defects such as uneven film thickness, surface scratches, bubbles, and crystal points, ensuring that only qualified products are wound and packaged. The detection module monitors the film material quality in real time. Once a quality problem is detected, it can immediately provide feedback to various parts of the production system (such as the biaxial stretching module 300, cooling module 700, and speed control roller module) via an intelligent module, allowing for rapid adjustment of the corresponding process parameters. For example, if a thickness deviation is detected, the quality problem can be corrected promptly by adjusting the molten material extrusion rate of the extrusion die 822, the cooling rate of the casting roller group 821, or the conveying speed of the speed control roller group 51, reducing waste and improving production efficiency and material utilization.

[0073] In one embodiment, the cutting module 200 includes one of a laser cutting assembly, a hot wire cutting assembly, and a blade cutting assembly. Further, the cutting module 200 includes a laser cutting head 21, a support platform 22, and a robotic arm assembly 23. One end of the robotic arm assembly 23 is rotatably connected to the support platform 22, and the other end is connected to the laser cutting head 21. The robotic arm assembly 23 is driven by a cutting drive 24, enabling the laser cutting head 21 to approach or move away from the support platform 22 to cut the thin film material on the support platform 22.

[0074] Furthermore, since the temperature at the heating module 600 and cooling module 700 needs a certain amount of time to change after the intelligent module issues the speed module switching, there is a certain time interval between the time when the intelligent module controls the cutter to cut the film material and the time when the intelligent module switches the speed module. During this time interval, the produced film material is a defective product that does not meet the required physical parameters. The length of the defective film material depends on the conveying speed of the speed regulating roller module 500.

[0075] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A polyester film production apparatus, characterized in that, include: The frame has a biaxial stretching zone and a winding zone arranged sequentially on it. The biaxial stretching module is located in the biaxial stretching zone, and the winding module is located in the winding zone. The cutter module is located on the side of the biaxial stretching zone away from the winding zone. The speed-regulating roller module includes multiple speed-regulating rollers respectively disposed in the biaxial stretching zone and the winding zone, for adjusting the conveying speed of the film material on the frame; A heating module is located before the biaxial stretching zone to raise the temperature of the film material; A cooling module is located between the winding area and the biaxial stretching area to reduce the temperature of the film material; The intelligent module is electrically connected to the winding module, the biaxial stretching module, the cutting module, the speed regulating roller module, the heating module, and the cooling module, and is used to adjust the production speed of the polyester film with one key. It can adjust the winding speed of the winding module and the conveying speed of the film material by the speed regulating roller module. The intelligent module can also coordinate the heating module and the cooling module with the speed regulating roller module to adjust the heating and cooling rates of the film material. The intelligent module includes multiple speed modes that can be switched between each other. Each speed mode includes a corresponding winding speed, conveying speed, heating speed, and cooling speed.

2. The polyester film production apparatus according to claim 1, wherein The heating module includes at least two stages of heat treatment components, wherein the heating power of the next stage heat treatment component is greater than that of the previous stage heat treatment component, so as to enable the film material to be heated in a gradient manner. And / or, the cooling module includes at least two stages of cooling components, wherein the cooling power of the next stage of cooling components is greater than that of the previous stage of cooling components, so as to enable the film material to be cooled in a gradient.

3. The polyester film production apparatus as described in claim 2, characterized in that, The heat treatment assembly includes an infrared heating assembly, which includes multiple infrared heating lamps evenly arranged along the conveying direction of the film material. The subsequent heat treatment assembly includes the infrared heating assembly and a hot air circulation assembly. The hot air circulation assembly includes a circulating fan and a heating element disposed within the circulating fan. The air inlet and outlet of the circulating fan are both oriented towards the film material.

4. The polyester film production apparatus as described in claim 3, characterized in that, The heating power of the infrared heating lamp in the next-level heat treatment assembly is greater than that of the infrared heating lamp in the previous-level heat treatment assembly. And / or, the final stage of the heat treatment assembly further includes a first temperature sensing assembly, which includes a plurality of temperature sensors disposed close to the infrared heating lamp and corresponding one-to-one with the infrared heating lamp, and the first temperature sensing assembly is electrically connected to the intelligent module.

5. The polyester film production apparatus as described in claim 2, characterized in that, The first-stage cooling assembly includes at least two air coolers, which are located below the film material and arranged along the extension direction of the film, with the air outlets of the air coolers facing the film material. The subsequent cooling assembly includes the air cooler and at least two cooling water roller groups, each comprising two cooling water rollers that clamp the film material from the upper and lower sides.

6. The polyester film production apparatus as described in claim 5, characterized in that, The cooling module further includes a second temperature sensing component disposed on the rack. The second temperature sensing component includes multiple temperature sensors, which are disposed close to the cooling component and correspond one-to-one with the multiple cooling components. The second temperature sensing component is electrically connected to the intelligent module.

7. The polyester film production apparatus as described in claim 1, characterized in that, The biaxial stretching module includes a longitudinal stretching component, a transverse stretching component, and an intermediate cooling component disposed between the longitudinal stretching component and the transverse stretching component. The intermediate cooling component is used to cool the film material.

8. The polyester film production apparatus as described in claim 7, characterized in that, The longitudinal stretching assembly includes a longitudinal stretching roller group and a speed regulating device. The longitudinal stretching roller group includes an active roller group and a driven roller group spaced apart along the stretching direction of the film material. The speed regulating device is rotatably connected to the active roller group and electrically connected to the intelligent module. And / or, the transverse stretching assembly includes a transverse stretching member and a heating member, the transverse stretching member being used to transversely stretch the film material, and the heating member being used to heat the film material and reduce the temperature variation range of the film material.

9. The polyester film production apparatus as described in claim 7, characterized in that, The speed regulating roller module also includes a tension buffer roller group, which is located between the longitudinal stretching component and the transverse stretching component. The tension buffer roller group includes a roller that abuts against the film material, a bracket for supporting the roller, and a tension sensor mounted on the bracket. Multiple rollers are provided. The bracket is rotatably connected to the frame through an adjustment drive, and the tension sensor, the adjustment drive, and the intelligent module are electrically connected.

10. The polyester film production apparatus as described in claim 1, characterized in that, The frame also includes a feeding area located on the side of the biaxial stretching zone away from the winding zone. The polyester film production device also includes a feeding module, which includes a melt extrusion assembly and a casting assembly. The melt extrusion assembly includes at least one twin-screw extruder capable of uniformly melting and mixing polyester materials. The casting assembly includes a casting roller assembly and an extrusion die. The extrusion die is used to uniformly extrude the molten material, and the casting roller assembly is used to rapidly cool and shape the molten material. And / or, the winding module includes a winding roller assembly and a tension control assembly installed between the winding roller assembly and the frame, the tension control assembly being electrically connected to the intelligent module; And / or, the polyester film production apparatus further includes a detection module located between the cooling module and the winding module, for quality detection of the film material.

Images