High-transparency high-brightness TPU base film extrusion equipment with online detection

Abstract

This invention relates to the field of base film production equipment technology, and discloses a high-transparency, high-brightness TPU base film extrusion equipment with online detection. It includes a cooling unit and an online detection unit mounted on the extrusion equipment frame. The cooling unit includes a mirror roller with an internal cavity and a mirror guide roller located below the mirror roller. The mirror guide roller has the same structure as the mirror roller. The mirror roller includes a fixed central shaft, a fixed disk, and a mirror rotating drum. Several cooling zones are sleeved on the fixed central shaft, each consisting of a cooling module, an inlet pipe, and an outlet pipe. The online detection unit includes a thickness measurement module, a visual inspection module, and an optical performance inspection module. All these structures are integrated into a mounting housing. This invention uses zoned temperature control to effectively cool the melt and form the base film. Simultaneously, it uses an online detection structure to monitor the base film quality in real time. Temperature can be adjusted based on the detection results to regulate the zoned cooling effect, allowing for troubleshooting of temperature difference faults without stopping the machine.

Description

Technical Field

[0001] This invention relates to the field of base film production equipment technology, and in particular to a high-transparency, high-brightness TPU base film extrusion equipment with online detection. Background Technology

[0002] TPU film is a thermoplastic polyurethane elastomer film with excellent tensile strength and elastic recovery properties. Due to factors such as production process and raw materials, TPU film may have various defects, such as bubbles, scratches, and impurities, which affect the appearance and performance of the film and may also cause problems during product use, reducing product reliability and service life. Currently, automated conveying, automated inspection, and automated marking are used in the production of TPU base film, which can quickly and accurately identify and mark defects in TPU film. However, this method generally inspects the finished base film. If problems can be quickly detected and corrected during the production process, production losses can be reduced.

[0003] Therefore, by rapidly monitoring the formed base film online and testing multiple indicators simultaneously, and by promptly reporting any problems, the aforementioned issues can be resolved and the corresponding requirements can be met.

[0004] In the actual production process, the cast melt needs to be cooled and formed by a mirror roller. The cooling roller usually cools the entire curved roller surface directly through a spiral heat conduction pipe. When the curved roller surface of the cooling roller comes into contact with the film, heat is transferred along the curved roller surface and the heat conduction pipe inside the cooling roller, causing the temperature of the curved roller surface of the cooling roller to rise. This can easily lead to temperature differences and cause problems in the formation of the base film. This is also a link in the base film production where problems are likely to occur.

[0005] Therefore, it is necessary to propose a high-transparency, high-brightness TPU base film extrusion device with online detection to solve the above problems. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a high-transparency, high-brightness TPU base film extrusion device with online detection.

[0007] This invention is achieved using the following technical solution: a cooling unit and an online detection unit installed on the frame of an extrusion equipment. The online detection unit includes a thickness measurement module, a visual inspection module, and an optical performance inspection module. The cooling unit includes a mirror roller with an internal cavity and a mirror guide roller located below the mirror roller. The mirror guide roller has the same structure as the mirror roller. The mirror roller includes a fixed central shaft, a fixed disk, and a mirror rotating cylinder. One end of the mirror rotating cylinder is attached to and rotatably connected to the fixed disk, and the other end is rotatably sleeved on the fixed central shaft. Several cooling zones are sleeved on the fixed central shaft, consisting of cooling modules, inlet pipes, and outlet pipes. Each cooling module is connected to an independent inlet pipe and outlet pipe. Multiple continuously arranged cooling modules constitute independent cooling zones, and multiple cooling zones are continuously arranged and contact the inner surface of the mirror rotating cylinder. During cooling, the temperature of different areas of the mirror rotating cylinder can be individually controlled through multiple continuous cooling zones.

[0008] As a further improvement to the above solution, the cooling module includes an annular body and a fixed arm fixedly connected inside the annular body. The fixed arm is provided with a polygonal opening that is matched and sleeved on the fixed central axis. An arc-shaped cooling water channel is provided inside the annular body of the cooling module. The inlet pipe and the outlet pipe both pass through the annular body and are respectively connected to the two ends of the arc-shaped cooling water channel.

[0009] As a further improvement to the above solution, two strip-shaped channels are symmetrically arranged on the fixed arm, four water inlet pipes are arranged in one strip-shaped channel, four water outlet pipes are arranged in the other strip-shaped channel, and multiple cooling modules in different zones are arranged in a spiral shape.

[0010] As a further improvement to the above solution, temperature control components are provided for different cooling zones. The temperature control components include two cylindrical parts, each containing a spiral-shaped pipe. The two pipes are connected at both ends by a connecting pipe. One cylindrical part is fitted onto the water inlet pipe, and the other cylindrical part contains a heating pipe and a cooling sleeve. The heating pipe is fixedly fitted inside the spiral-shaped pipe, and the cooling sleeve is fixedly fitted outside the spiral-shaped pipe. A radiator for dissipating heat from the cooling sleeve is fixedly installed on the cylindrical part, and a circulation pump is fixedly connected to the pipe.

[0011] As a further improvement to the above solution, the main body of the cooling module is made of heat-insulating material and an annular heat-conducting block with a connecting arc-shaped cooling water channel is embedded on the arc-shaped outer wall of the cooling module. Multiple heat-insulating plates are also wrapped between the fixed arm and the annular main body.

[0012] As a further improvement to the above solution, temperature sensors are fixedly installed on one side of several of the cooling modules and near the mirror rotating cylinder.

[0013] As a further improvement to the above solution, the thickness measurement module, the visual inspection module, and the optical performance inspection module are integrated into a mounting shell. The lower end of the mounting shell is open and a corresponding closed shell is provided. One end of the closed shell is rotatably connected to the mounting shell, and the other end is provided with a locking mechanism to ensure that the two are in a closed and fixed state. Open slots are provided on both sides of the mounting shell and the closed shell.

[0014] The thickness measurement module includes a strip mounting bracket, on both sides of which several thickness measurement sensor probes are arranged in an alternating pattern; the visual inspection module includes a strip mounting base, on the underside of which a linear array camera is arranged; the optical performance testing module includes several haze / transmittance meters arranged in an arrangement, each haze / transmittance meter including a light source emitter mounted on a mounting shell, and a light receiver corresponding to the light source emitter is also mounted on the enclosed shell.

[0015] As a further improvement to the above solution, an isolation structure is provided between the thickness measurement module, the visual inspection module and the optical performance inspection module. The isolation structure includes two light-shielding plates that are respectively fixed on the mounting shell and the sealing shell, and a gap is provided between the two light-shielding plates for the base film to pass through.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By incorporating a zoned cooling structure within the mirror roller, the melt under casting can be cooled. This cooling structure is superior to existing spiral flow channels, avoiding temperature differences caused by single flow channels and achieving better and more uniform cooling. This ensures the production quality of the base film. Furthermore, the zoned structure allows for temperature adjustment of different zones via temperature control components. In case of temperature issues, adjustments are made only to the problematic zone, eliminating the need for machine shutdown and preventing problems caused by uneven cooling of the base film. The multiple cooling modules allow for a rational arrangement of the internal space of the mirror roller while ensuring effective zoned cooling. Each zone corresponds to a separate temperature control component, allowing for arbitrary adjustment of individual zones. The temperature of each zone is precisely controlled to further adapt to the cooling effect required by the base film. Moreover, it can be operated without stopping the machine during actual use, avoiding further losses. The annular heat-conducting block allows for sufficient heat exchange between the cooling water channel and the mirror-finished rotating drum, resulting in a cooling effect. At the same time, the design of the heat insulation material of the cooling module can prevent heat from being exchanged from other places and thus ensure the cooling effect and avoid temperature differences. In addition, multiple heat insulation plates are set up to divide the channel formed by multiple integrated cooling modules into channels corresponding to different zones. This allows the different inlet and outlet pipes of multiple zones to be in different channels, thereby avoiding the influence of heat transfer and further ensuring the cooling effect.

[0017] After the base film is cooled, it needs to pass between the mounting shell and the sealing shell. Between the mounting shell and the sealing shell, there are thickness measurement modules, vision inspection modules and optical performance inspection modules, which can detect a variety of parameters of the base film. At the same time, it can also judge whether the base film has problems due to uneven cooling. It is logically linked with the partitioned cooling structure in the mirror roller to realize online autonomous detection and control.

[0018] The structural design of the mounting shell and the enclosed shell can adaptively protect the various internal detection modules, while ensuring the working environment of the various detection modules, isolating them from external influences, and fully guaranteeing the accuracy of the detection. Moreover, it is easy to open, thus facilitating the delivery of the base film and the maintenance and replacement of internal components. Attached Figure Description

[0019] Figure 1 This is an overall view of the high-transparency, high-brightness TPU base film extrusion equipment with online detection of the present invention; Figure 2 This is a view of the inside of the mirror roller of the high-transparency, high-brightness TPU base film extrusion device with online detection of the present invention; Figure 3 This is a view of the interior of the mounting housing of the high-transparency, high-brightness TPU base film extrusion equipment with online detection according to the present invention; Figure 4 This is a half-sectional view of the cooling module; Figure 5 An exploded view of the mirror roller and its connecting components; Figure 6 An exploded view of the cooling unit; Figure 7 Structural diagram of the temperature control component Figure 8 This is a partial exploded view of the temperature control component; Figure 9 This is a system block diagram of the high-transparency, high-brightness TPU base film extrusion equipment with online detection according to the present invention.

[0020] Explanation of key symbols: 100. Mirror roller; 101. Mirror guide roller; 102. Fixed central shaft; 103. Fixed disc; 104. Mirror rotating drum; 105. Cooling module; 106. Water inlet pipe; 107. Water outlet pipe; 108. Pipe fitting; 109. Heating tube; 110. Cooling jacket; 111. Radiator; 112. Circulating pump; 113. Temperature sensor; 114. Cylinder fitting; 120. Annular body; 121. Fixed arm; 122. Annular heat-conducting block; 123. Heat insulation plate; 200. Mounting shell; 201. Enclosed shell; 203. Strip mounting bracket; 204. Thickness sensor probe; 205. Strip mounting base; 206. Linear array camera; 207. Haze / transmittance meter; 208. Light source emitter; 209. Light receiver; 210. Connecting seat; 211. Light blocking plate; 212. Inspection door. Detailed Implementation

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0022] Please combine Figures 1 to 9 A high-transparency, high-brightness TPU base film extrusion device with online detection includes a cooling unit and an online detection unit mounted on an integrated extrusion equipment frame (not shown). The cooling unit includes a mirror roller 100 with an internal cavity and a mirror guide roller 101 located below the mirror roller 100. The mirror guide roller 101 has the same structure as the mirror roller 100, and both surfaces are high-precision polished with Ra≤0.01μm. The internal cavity of the mirror roller 100 is equipped with a cooling structure. Generally, the mirror roller 100 is mainly used to receive the melt and quickly and uniformly cool the melt to suppress crystallization, reduce haze, and improve light transmittance. Therefore, a spiral flow channel is set in the mirror roller 100, and the water temperature is controlled at 20-30℃ with an accuracy of ±1℃. In this invention, as shown... Figure 2 As shown, the mirror roller 100 includes a fixed central shaft 102, a fixed disk 103, and a mirror rotating drum 104. One end of the mirror rotating drum 104 is attached to and rotatably connected to the fixed disk 103, and the other end is rotatably sleeved on the fixed central shaft 102. In actual use, although the spiral flow channel can achieve uniform contact heat dissipation, the cooling temperature varies at different locations because the water flows from one end of the spiral to the other. The temperature is lower closer to the water inlet and higher further away from the water inlet. In the actual extrusion process, if uneven temperature occurs, it can easily lead to problems with the quality of the base film. Stopping or continuing to operate when problems occur will result in significant losses. To solve this problem, the cooling structure can be divided into zones, and water can be supplied separately to different zones, ensuring that the temperature difference between different zones is small. Therefore, such as Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, several cooling zones are fitted onto the fixed central axis 102, each consisting of a cooling module 105, an inlet pipe 106, and an outlet pipe 107. Each cooling module 105 is connected to an independent inlet pipe 106 and an outlet pipe 107. Multiple consecutively arranged cooling modules 105 constitute independent cooling zones, and these zones are continuously positioned and contact the inner surface of the mirror-like rotating cylinder 104. During cooling, temperature control of different areas of the mirror-like rotating cylinder 104 can be achieved independently through these multiple consecutive cooling zones. Specifically, the cooling module 105 is fitted onto the fixed central axis 102 for positioning. The cross-section of the fixed central axis 102 is polygonal. The cooling module 105... The opening should match the polygonal cross-section to restrict the non-axial rotation of the cooling module 105. The outer wall of the cooling module 105 is annular and contacts the inner wall of the mirror rotating cylinder 104. The mirror rotating cylinder 104 and multiple cooling modules 105 can rotate relative to each other. Specifically, the cooling module 105 includes an annular body 120 and a fixed arm 121 fixedly connected inside the annular body 120. The fixed arm 121 is provided with a polygonal opening that matches and is fitted onto the fixed central shaft 102. The annular body 120 of the cooling module 105 is provided with an arc-shaped cooling water channel. The inlet pipe 106 and the outlet pipe 107 both pass through the annular body 120 and respectively connect to the arc-shaped cooling water channel. The two ends of the channel are connected. The cooling medium enters the cooling channel through the inlet pipe 106 and then exits through the outlet pipe 107. Compared with a spiral channel, the design of this structure in this invention ensures that the coolant at the contact point with the melt is always colder, avoiding the temperature difference that is prone to occur in spiral channel structures. In actual settings, different zones are composed of multiple cooling modules 105. In one embodiment, a single zone includes four cooling modules 105. To facilitate the routing of the inlet pipe 106 and the outlet pipe 107, two strip-shaped slots are symmetrically arranged on the fixing arm 121. The four inlet pipes 106 are arranged in one strip-shaped slot, and the four outlet pipes 107 are arranged in... In another strip-shaped channel, due to the setting of multiple partitions, the multiple cooling modules 105 in different partitions should be arranged in a spiral shape, that is, the polygon corresponding to the fixed central axis 105 should be rotated by a fixed angle to arrange them, so that the water inlet pipe 106 and the water outlet pipe 107 can be easily wired and the multiple partitions will not interfere with each other. According to the number of partitions, the number of sides of the cross-sectional polygon of the central axis 102 can be fixed in advance. At the same time, in order to facilitate the temperature control of a single partition, the water inlet pipe 106 and the water outlet pipe 107 on the multiple cooling modules 105 can be integrated into a wire harness or connected into a single pipe structure. The single pipe structure can facilitate the subsequent integration with temperature control components.

[0023] In this invention, to achieve zoned temperature control, an additional temperature control module can be set up to control and adjust the temperature of different zones. This allows for rapid correction of the problem without shutting down the machine, restoring the extrusion cooling quality of the base film, by adjusting the temperature of the corresponding zone when the base film experiences temperature issues. Temperature control components are provided for different zones, such as... Figure 7 and Figure 8 As shown, the temperature control assembly includes two cylindrical components 114, each containing a spiral-shaped tube 108. Both ends of the two tubes 108 are connected by a connecting pipe, meaning a circulation pipe is provided between the two cylindrical components 114, and this circulation pipe is spiral-shaped within the two cylindrical components 114. One cylindrical component 114 is fitted onto the water inlet pipe 106, and the other cylindrical component 114 contains a heating element 109 and a cooling sleeve 110. The heating element 109 is fixedly fitted inside the spiral-shaped tube 108, and the cooling sleeve 110 is fixedly fitted outside the spiral-shaped tube 108. A radiator 111 is fixedly installed on the 14 to dissipate heat from the cooling jacket 110. During actual temperature control, the heating tube 109 can heat the medium inside the pipe 108 to increase the temperature after being energized. If the temperature needs to be reduced, the radiator 111 is used to cool the pipe 108 by utilizing the cooling jacket 110. For the above structure, heat exchange is also required between the two cylinders 114. Therefore, a circulation pump 112 is fixedly connected to the pipe 108 to realize the circulation of the medium inside the pipe 108, thereby controlling the temperature of different zones. In this invention, the temperature of different zones within the mirror roller 100 can be regulated. However, during zone cooling temperature control, the main temperature is still conveyed through the inlet pipe 106 and outlet pipe 107, and the conveying direction is mainly within the mirror drum 104 and multiple cooling modules 105. This means that multiple inlet pipes 106 and outlet pipes 107 will pass through other cooling zones, causing temperature interference between zones. Therefore, a structure to isolate the temperature should be designed. Specifically, in this invention, the main body of the cooling module 105 is made of heat-insulating material, and an annular heat-conducting block 122 connecting the arc-shaped cooling water channels is embedded on the arc-shaped outer wall of the cooling module 105. This means that the heat from the cooling water channels will only be transferred outward from the annular heat-conducting block 122 and cannot be transferred from other locations within the cooling module 105. The heat from the cooling water channels within adjacent cooling modules 105 will not interfere with each other. Furthermore, the inlet pipes 106 and outlet pipes 107 passing through other zones should be isolated. 7. Temperature isolation is achieved. Therefore, within the cooling module 105, multiple heat insulation plates 123 are wound between the fixed arm 121 and the annular body 120. These heat insulation plates 123 and the fixed arm 121 are evenly wound within the annular body 120. The number of heat insulation plates 123 is equal to the number of sides of the polygon minus one, perfectly complementing the fixed arm 121 to divide the annular body 120 into multiple regions equal to the number of zones. When the cooling modules 105 of multiple cooling zones are fitted onto the fixed central shaft 102, and the cooling modules 105 of different zones are arranged in a spiral rotation at the same angle, the multiple heat insulation plates 123 are also joined together, thereby dividing the channel formed by the cooling modules 105 into multiple channels corresponding to the number of polygons, allowing the inlet pipe 106 and outlet pipe 107 to pass through, preventing interference between the cooling media of different zones. Simultaneously, temperature monitoring is required during temperature control, and the surface of the mirror roller 100 should be maintained according to its function. Therefore, in some improved solutions, as a preferred option, such as... Figure 4 As shown, temperature sensors 113 are fixedly installed on one side of several cooling modules 105 and near the mirror drum 104 inside the mirror roller 100. In this way, the temperature of the mirror roller 100 can be monitored in real time, which is convenient to cooperate with the temperature control module mentioned above to achieve temperature control. When performing zoned temperature adjustment, it is also necessary to detect whether the base film is experiencing problems due to temperature. Combined with the aforementioned temperature detection, subsequent temperature adjustments can be made to correct the issues. Therefore, an online detection structure is also provided for the base film formed from the cooled and solidified melt. Specifically, due to the characteristics of the base film, its thickness, uniformity, transmittance, gloss, and the presence of defects can be detected. Based on existing industrial testing standards and commonly used instruments, thickness gauges, visual inspection cameras, and haze / transmittance meters can be installed. In this invention, specifically, as shown... Figure 3As shown, the online inspection unit includes a thickness measurement module, a vision inspection module, and an optical performance inspection module. These structures are integrated into a mounting shell 200. The mounting shell 200 is mounted on the frame, just like the mirror roller 100. The lower end of the mounting shell 200 is open and a corresponding closed shell 201 is provided. One end of the closed shell 201 is rotatably connected to the mounting shell 200, and a locking mechanism is provided between the other end and the mounting shell 200. The locking mechanism adopts any limiting structure in the prior art, such as a buckle, to achieve the sealing and fixing between the mounting shell 200 and the closed shell 201. Both the mounting shell 200 and the closed shell 201 have open slots on both sides. The open slots of the two are matched to form an opening that allows the base film to pass through. This has little impact on the sealing effect of the mounting shell 200 and the closed shell 201. Specifically, the thickness measurement module includes a strip mounting bracket 203, on both sides of which are arranged several thickness measurement sensor probes 204. The thickness measurement sensor probes 204 employ spectral confocal sensors with an accuracy of ±0.1μm, achieving ultra-high precision non-contact thickness measurement. The thickness measurement sensor probes 204, arranged in two rows with staggered arrangement, can achieve comprehensive thickness measurement of the base film. Compared to the scanning method used in existing thickness measurement structures, this method offers higher accuracy and faster response. Specifically, the visual inspection module includes a strip mounting base 205, on the underside of which are arranged linear array phase... The linear array camera 206 employs 8K high resolution and can be used in conjunction with AI algorithms to accurately identify minute defects on the base film. The linear array distribution ensures comprehensive detection. Specifically, the optical performance testing module includes several haze / transmittance meters 207 arranged in an array. Each haze / transmittance meter 207 includes a light source emitter 208 mounted on the mounting housing 200. A light receiver 209 is also mounted on the enclosed housing 201 corresponding to the light source emitter 208. In conjunction with this structure, an integrating sphere and a slow-emission light receiver should also be included during the actual testing process. The photoelectric conversion module and data processing unit are all concealed and designed to detect haze / transmittance, thereby achieving the desired detection effect on the haze and transmittance of the base film.

[0024] Furthermore, as mentioned above, in this invention, the detection effect is mainly achieved through the thickness measurement module, the visual inspection module, and the optical performance inspection module. However, when the above three inspection modules are implemented, the inspection environment needs to be guaranteed to ensure the accuracy of the inspection results. Therefore, anti-interference structures should be provided in the mounting shell 200 and the enclosed shell 201 for the three inspection modules.

[0025] For the thickness measurement module, based on the characteristics of the thickness sensor, it is necessary to avoid the influence of vibration during actual operation. Even slight vibrations can cause deviations in the thickness measurement sensor results. At the same time, it is necessary to ensure that the position of the thickness sensor remains constant and that no slight displacement occurs that could lead to thickness measurement failure. To this end, specifically, the strip mounting bracket 203 is fixedly connected to the top of the mounting shell 200 through the connecting seats 210 on both sides. The connecting seats 210 and the mounting shell 200 are fixed with bolts, and the connecting seats 210 and the strip mounting bracket 203 are also fixed with bolts. Vibration-absorbing pads are placed between the connecting seats 210, the strip mounting bracket 203, and the mounting shell 200 to ensure stable fixation and absorb vibrations, thereby preventing vibrations and ensuring the stability of thickness measurement.

[0026] For the visual inspection module, based on the characteristics of the line scan camera, it is necessary to avoid the influence of vibration during actual operation, as vibration will affect the camera's working effect. Furthermore, the camera is also affected by environmental factors such as dust. Therefore, it needs to be shot in a clean environment. Existing dust covers or blowing devices are used to achieve a clean working environment for the camera. The mounting shell 200 and the closed shell 201 can form a closed structure, which makes it difficult for external dust to enter, thus ensuring a clean internal environment. Similarly, the connection structure between the strip mounting base 205 and the mounting shell 200 is the same as that of the strip mounting bracket 203, that is, it is also connected and fixed by the connecting base 210, and fixed with the vibration-absorbing pad structure and bolts, thus achieving a vibration-absorbing and fixed structure that is not affected by vibration and can ensure no displacement or shift.

[0027] For the optical performance testing module, based on the characteristics of the haze / transmittance meter, avoiding the influence of vibration and dust is one of the conditions in actual operation. Most importantly, it is necessary to avoid the influence of external light sources. First, regarding the influence of external light sources, according to the above structure, the mounting shell 200 and the sealing shell 201 constitute a closed structure, which can isolate a certain amount of external light sources. However, the vision inspection module inside the mounting shell 200 also requires a certain light source to ensure the detection effect. The two will have relative influence on each other due to the light source. Corresponding isolation structures need to be set in the mounting shell 200 and the sealing shell 201 to avoid interference and ensure the detection accuracy of each module. Specifically, isolation structures are set between the thickness measurement module, the vision inspection module, and the optical performance testing module. The isolation structure includes two light-shielding plates 211 that are respectively sealed and fixed on the mounting shell 200 and the sealing shell 201. A gap is set between the two light-shielding plates 211 for the base film to pass through. This gap is suitable for base films of various thicknesses. In the actual testing process, although a light-blocking plate 211 is set, a gap still needs to be maintained for the base film to pass through. Therefore, the light sources may still interfere with each other. In addition to the thickness sensing probe 204 being set vertically with its laser beam emitted vertically, the light sources of the other visual inspection module and optical performance inspection module are also set vertically to minimize mutual interference between the light sources. At the same time, in order to facilitate maintenance and repair during actual operation, an inspection door 212 is set at the upper end of the mounting shell 200. The thickness sensing probe 204, the line scan camera 206, and the light source emitter 208 are all fixed by detachable fixing components. The detachable fixing components can use bolt fixing sleeves or fixing buckle structures to ensure stable fixing while also facilitating disassembly. When maintenance or replacement is required, the inspection door 212 can be opened to facilitate operation of the thickness sensing probe 204, the line scan camera 206, and the light source emitter 208. The light receiver 209 of the corresponding light source emitter 208 is also fixed to the closed shell 201 by detachable fixing components, making disassembly and assembly convenient after opening the closed shell 201.

[0028] Based on the above structure, such as Figure 9 As shown, the base film can be inspected through the thickness measurement module, vision inspection module, and optical performance inspection module. A data processing center unit should be set up to collect and process various inspection data. At the same time, the temperature data of the partitions on the mirror roller 100 also needs to be collected, that is, the data of the temperature sensor 113 is transmitted to the data processing center unit. Moreover, the temperature change of each partition on the mirror roller 100 needs to be controlled. Therefore, a central control system is set up with the algorithm to collect various data and issue corresponding instructions to control the heating tube 109 and the heat sink 111.

[0029] The implementation principle of a high-transparency, high-brightness TPU base film extrusion device with online detection in this application embodiment is as follows: In use, the cast melt first adheres to the mirror roller 100 and the mirror guide roller 101, and is cooled to become a base film. Then, the base film is conveyed through the two guide roller structures. During the conveying process, the base film passes between the mounting shell 200 and the sealing shell 201, and is detected by the thickness measuring module, visual inspection module and optical performance inspection module between the two. The detection results can be used to determine whether there are any problems affecting the cooling temperature on the mirror roller 100. The mirror roller 100 contains multiple cooling modules 5, which are divided into multiple zones according to a fixed number. The inlet pipes 106 and outlet pipes 107 corresponding to the cooling modules 5 in each zone are integrated into a single pipe. These are also arranged in different positions within the mirror roller 100 to avoid heat interference. A temperature control component controls the temperature of the inlet pipe 106, thereby controlling the zone temperature and preventing temperature differences in a single flow channel. The zone temperature sensor 113 transmits the temperature of the corresponding zone to the central control system. When the base film is transported between the mounting shell 200 and the sealing shell 201, its thickness, haze / transmittance, and other properties are monitored. The presence of defects will be inspected, and when a problem is detected in the corresponding location, a judgment will be made. First, it will be judged whether there is an uneven temperature cooling problem. If a problem is found, it will be calibrated with the zone temperature. Then, the heating tube 109 and heat sink 111 in the temperature control component will be controlled to change the temperature, thereby quickly eliminating the temperature problem. In actual situations, other problems will also be judged, such as whether the surface of the mirror roller 100 is still smooth, whether there is external interference, and other problems that can be found on the base film, thereby issuing an alarm. The design of the mounting shell 200 and the closed shell 201 can avoid the influence of the external environment on the test results and facilitate use.

[0030] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A high-transparency, high-brightness TPU base film extrusion device with online detection, characterized in that, It includes a cooling unit installed on the frame of the extrusion equipment and an online inspection unit, which includes a thickness measurement module, a vision inspection module and an optical performance inspection module; The cooling unit includes a mirror roller (100) with an internal cavity and a mirror guide roller (101) located below the mirror roller (100). The mirror guide roller (101) has the same structure as the mirror roller (100). The mirror roller (100) includes a fixed central shaft (102), a fixed disk (103), and a mirror rotating cylinder (104). One end of the mirror rotating cylinder (104) is attached to the fixed disk (103) and rotatably connected to it, while the other end is rotatably sleeved on the fixed central shaft (102). Several cooling zones are fitted on the fixed central axis (102), consisting of a cooling module (105), an inlet pipe (106), and an outlet pipe (107). Each cooling module (105) is connected to an independent inlet pipe (106) and an outlet pipe (107). Multiple continuously arranged cooling modules (105) constitute independent cooling zones, and multiple cooling zones are continuously set and contact the inner surface of the mirror rotating cylinder (104). During cooling, the temperature of different areas of the mirror rotating cylinder (104) can be individually controlled through multiple continuous cooling zones.

2. The high-transparency, high-brightness TPU base film extrusion equipment with online detection as described in claim 1, characterized in that, The cooling module (105) includes an annular body (120) and a fixed arm (121) fixedly connected inside the annular body (120). The fixed arm (121) is provided with a polygonal opening that is matched and sleeved on the fixed central shaft (102). The annular body (120) of the cooling module (105) is provided with an arc-shaped cooling water channel. The inlet pipe (106) and the outlet pipe (107) both pass through the annular body (120) and are respectively connected to the two ends of the arc-shaped cooling water channel.

3. The high-transparency, high-brightness TPU base film extrusion equipment with online detection as described in claim 2, characterized in that, Two strip-shaped channels are symmetrically arranged on the fixed arm (121). Four water inlet pipes (106) are arranged in one strip-shaped channel, and four water outlet pipes (107) are arranged in another strip-shaped channel. Multiple cooling modules (105) in different zones are arranged in a spiral shape.

4. The high-transparency, high-brightness TPU base film extrusion equipment with online detection as described in claim 1, characterized in that, Temperature control components are provided for different cooling zones. The temperature control components include two cylindrical parts (114). A spiral tube (108) is fixed inside each of the two cylindrical parts (114). The two ends of the two tubes (108) are connected by a connecting pipe. One of the cylindrical parts (114) is sleeved on the water inlet pipe (106). A heating tube (109) and a cooling sleeve (110) are provided inside the other cylindrical part (114). The heating tube (109) is fixedly sleeved inside the spiral tube (108), and the cooling sleeve (110) is fixedly sleeved outside the spiral tube (108). A radiator (111) for dissipating heat from the cooling sleeve (110) is fixedly installed on the cylindrical part (114), and a circulating pump (112) is fixedly connected to the tube (108).

5. The high-transparency, high-brightness TPU base film extrusion equipment with online detection as described in claim 2, characterized in that, The main body of the cooling module (105) is made of heat insulation material and an annular heat-conducting block (122) with a connecting arc-shaped cooling water channel is embedded on the arc-shaped outer wall of the cooling module (105). Multiple heat insulation plates (123) are also arranged between the fixed arm (121) and the annular main body (120).

6. The high-transparency, high-brightness TPU base film extrusion equipment with online detection as described in claim 1, characterized in that, Temperature sensors (113) are fixedly installed on one side of several of the cooling modules (105) and near the mirror rotating cylinder (104).

7. The high-transparency, high-brightness TPU base film extrusion equipment with online detection as described in claim 1, characterized in that, The thickness measurement module, visual inspection module and optical performance inspection module are integrated in a mounting shell (200). The lower end of the mounting shell (200) is open and a corresponding closed shell (201) is provided. One end of the closed shell (201) is rotatably connected to the mounting shell (200), and the other end is provided with a locking mechanism between it and the mounting shell (200) to ensure that the two are closed and fixed. Open slots are provided on both sides of the mounting shell (200) and the closed shell (201).

8. The thickness measurement module includes a strip mounting bracket (203), on both sides of the strip mounting bracket (203) are several thickness measurement sensor probes (204) arranged in an alternating pattern; the visual inspection module includes a strip mounting base (205), on the lower side of the strip mounting base (205) are line array cameras (206); the optical performance inspection module includes several haze / transmittance meters (207) arranged in an alternating pattern, the haze / transmittance meter (207) includes a light source emitter (208) disposed on the mounting shell (200), and a light receiver (209) is also disposed on the closed shell (201) corresponding to the light source emitter (208).

9. The high-transparency, high-brightness TPU base film extrusion equipment with online detection as described in claim 7, characterized in that, An isolation structure is provided between the thickness measurement module, the visual inspection module and the optical performance inspection module. The isolation structure includes two light-shielding plates (211) that are respectively fixed on the mounting shell (200) and the sealing shell (201). A gap is provided between the two light-shielding plates (211) for the base film to pass through.

Images