Online testing device for multilayer co-extruded composite films

Abstract

This utility model relates to the field of composite film testing technology and discloses an online testing device for multilayer co-extruded composite films, including a testing platform, a support frame, and a laser thickness gauge. An adjusting rod is threadedly connected to the top of the support frame, and a mounting frame is rotatably connected to the bottom end of the adjusting rod. Limiting rods are slidably connected to the front and rear sides of the top of the support frame, and the bottom ends of the two limiting rods are fixedly connected to the top of the mounting frame. A dust collection hood is fixedly connected to the right side of the mounting frame, and a servo motor is fixedly connected to the front side of the mounting frame. The output end of the servo motor passes through the front side of the mounting frame and is fixedly connected to a brush roller. In this utility model, the brush roller cleans the surface dust of the composite film, and a comb plate scrapes off the dust remaining on the brush roller, ultimately causing the dust to fall into the dust collection hood, which then sucks it up, achieving thorough treatment of the dust on the surface of the composite film.

Description

Technical Field

[0001] This utility model relates to the field of composite film testing technology, and in particular to an online testing device for multilayer co-extruded composite films. Background Technology

[0002] As the industry's requirements for product quality continue to rise, the production process of multilayer co-extruded composite films requires real-time and accurate online detection to ensure that key indicators such as thickness and uniformity meet standards. As a result, online detection devices for multilayer co-extruded composite films have emerged. By monitoring the composite film in real time during the production process and providing timely feedback on quality data, these devices are of great significance for ensuring product quality and improving production efficiency.

[0003] Currently, in online inspection devices for multilayer co-extruded composite films, using laser thickness gauges to detect the surface thickness of the composite film is a common technique. To ensure accuracy, the surface of the composite film must be kept clean. In traditional scenarios, operators often manually wipe or blow with compressed air to clean the surface dust during production breaks. However, this manual cleaning method is not only time-consuming and labor-intensive, but also difficult to fully cover the entire surface of the composite film, easily resulting in incomplete cleaning. To solve this problem, existing devices have introduced automated dust collection devices, which use negative pressure adsorption to extract surface dust in real time during the composite film's operation. However, in actual production, due to friction between the composite film and equipment components during extrusion and traction, static electricity is easily generated, causing dust to adhere firmly to the surface of the composite film under electrostatic adsorption. The dust collection device, relying solely on airflow suction, cannot overcome the electrostatic adsorption force and cannot completely remove stubborn dust particles. This causes the laser thickness gauge to produce thickness data deviations due to dust interference during inspection, thus affecting the accurate judgment of the composite film's quality and ultimately leading to unqualified products entering the market. Therefore, an online inspection device for multilayer co-extruded composite films is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an online detection device for multilayer co-extruded composite films, which aims to improve the problem in the prior art where static electricity is easily generated due to friction between the composite film and equipment components during extrusion and traction, causing dust to adhere firmly to the surface of the composite film under the action of electrostatic adsorption, and the dust collection device cannot completely remove dust particles by relying solely on airflow suction.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an online inspection device for multilayer co-extruded composite film, including an inspection platform, a support frame, and a laser thickness gauge. An adjusting rod is threadedly connected to the top of the support frame, and a mounting frame is rotatably connected to the bottom end of the adjusting rod. Limiting rods are slidably connected to the front and rear sides of the top of the support frame, and the bottom ends of the two limiting rods are fixedly connected to the top of the mounting frame. A dust collection hood is fixedly connected to the right side of the mounting frame. A servo motor is fixedly connected to the front side of the mounting frame, and the output end of the servo motor passes through the front side of the mounting frame and is fixedly connected to a brush roller. A comb plate is fixedly connected to the inner side of the dust collection hood, and a dust collection pipe is connected to the right side of the dust collection hood. A dust collection assembly is provided at the bottom inner side of the support frame. An unwinding assembly is provided at the top right end of the inspection platform, and a winding assembly is provided at the top left end of the inspection platform. A limit adjustment mechanism is provided at the top of the inspection platform, and the limit adjustment mechanism is used to tension and limit the composite film.

[0006] As a further description of the above technical solution:

[0007] The limiting adjustment mechanism includes a limiting frame, which is fixedly connected to the top right end of the detection table. Limiting grooves are provided on both the front and rear sides of the limiting frame. Slide plates are slidably connected to the inner sides of both limiting grooves. H-shaped frames are fixedly connected between adjacent slide plates. A tension roller is rotatably connected to the top inner side of the H-shaped frame. Two adjusting rings are slidably connected to the outer wall of the tension roller. A bidirectional threaded rod is rotatably connected to the front side of the H-shaped frame. The rear end of the bidirectional threaded rod passes through the front side of the H-shaped frame and is threadedly connected to two connecting plates. A sliding groove is provided on the top inner side of the H-shaped frame. The tops of the two connecting plates pass through the inner side of the sliding groove and are fixedly connected to the bottom of the outer wall of the adjusting ring.

[0008] As a further description of the above technical solution:

[0009] The limit adjustment mechanism also includes two fixed plates, both of which are fixedly connected to the left and right sides inside the H-shaped frame. A force-bearing cylinder is fixedly connected to the bottom of each of the two fixed plates, and a telescopic rod is fixedly connected to the bottom end of each of the two force-bearing cylinders. A pressure sensor is installed on the outer wall of each of the two force-bearing cylinders.

[0010] As a further description of the above technical solution:

[0011] The dust collection assembly includes a filter box, which is fixedly connected to the inner bottom of the testing platform. A connecting pipe is connected to the front of the filter box, and one end of the connecting pipe is connected to a vacuum cleaner. An air pipe is connected to the rear of the filter box, and a filter plate is slidably connected to the right side of the filter box.

[0012] As a further description of the above technical solution:

[0013] One end of the air pipe passes through the top of the support frame and is connected to a telescopic tube, the bottom end of which is connected to the top of the vacuum pipe.

[0014] As a further description of the above technical solution:

[0015] The unwinding assembly includes a roller frame, which is fixedly connected to the top right end of the inspection table, and an unwinding roller is rotatably connected to the inner side of the roller frame.

[0016] As a further description of the above technical solution:

[0017] The winding assembly includes a second roller frame, which is fixedly connected to the top left end of the inspection table. A second servo motor is fixedly connected to the rear side of the second roller frame, and the output end of the second servo motor passes through the rear side of the second roller frame and is fixedly connected to a winding roller.

[0018] As a further description of the above technical solution:

[0019] The top of the testing platform is fixedly connected to a second mounting frame, and the top of the second mounting frame is fixedly connected to a cylinder. One end of the cylinder passes through the top of the second mounting frame and is fixedly connected to a squeezing roller. A roller column is rotatably connected to the bottom inner side of the second mounting frame.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, rotating the adjusting rod causes the brush roller to adhere to the composite film. The servo motor is then activated to drive the brush roller to clean the surface dust of the composite film. A comb plate scrapes away any remaining dust on the brush roller, which then falls uniformly into the dust collection hood. The vacuum cleaner is then activated to create negative pressure in the filter box, and the dust is injected into the filter box through an air pipe via the dust collection hood. The dust is then filtered by the filter plate in the filter box, and excess air is discharged from the other end of the vacuum cleaner. This achieves thorough treatment of the dust on the surface of the composite film, improving detection accuracy.

[0022] 2. In this utility model, the composite film is supported during the transmission process by a stretching roller. According to the size of the composite film, the bidirectional threaded rod is rotated to drive the adjusting ring to adjust inward or outward. The adjusting ring is used to prevent the multi-strand composite film from shifting. When the pressure of the composite film on the stretching roller decreases, the pressure sensor will determine that the composite film is loose and control the telescopic rod to quickly adjust the tension. Attached Figure Description

[0023] Figure 1 This is a perspective view of the online detection device for multilayer co-extruded composite films proposed in this utility model;

[0024] Figure 2This is a front view of the online detection device for multilayer co-extruded composite films proposed in this utility model;

[0025] Figure 3 This is a partial structural schematic diagram of the online detection device for multilayer co-extruded composite films proposed in this utility model;

[0026] Figure 4 This is a split view of the brush roller of the online detection device for multilayer co-extruded composite film proposed in this utility model;

[0027] Figure 5 This is a partial structural diagram of the limit adjustment mechanism of the online detection device for multilayer co-extruded composite film proposed in this utility model.

[0028] Legend:

[0029] 1. Testing table; 2. Limit adjustment mechanism; 201. Limit frame; 202. Limit groove; 203. Slide plate; 204. H-shaped frame; 205. Tension roller; 206. Adjusting ring; 207. Slide groove; 208. Connecting plate; 209. Bidirectional threaded rod; 210. Fixing plate; 211. Telescopic rod; 212. Force-bearing cylinder; 213. Pressure sensor; 3. Support frame; 4. Adjusting rod; 5. Mounting bracket one; 6. Dust collection hood; 7. Servo motor 1; 8. Brush roller; 9. Comb plate; 10. Suction pipe; 11. Air pipe; 12. Filter box; 13. Connecting pipe; 14. Vacuum cleaner; 15. Filter plate; 16. Telescopic pipe; 17. Limiting rod; 18. Laser thickness gauge; 19. Roller frame 1; 20. Unwinding roller; 21. Roller frame 2; 22. Rewinding roller; 23. Servo motor 2; 24. Roller column; 25. Mounting frame 2; 26. Cylinder; 27. Extrusion roller. Detailed Implementation

[0030] 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 protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of an online inspection device for multilayer co-extruded composite films, including an inspection table 1, a support frame 3, and a laser thickness gauge 18. An adjusting rod 4 is threadedly connected to the top of the support frame 3. The laser thickness gauge 18 is installed on one side of the support frame 3. It uses a laser beam to irradiate the surface of the composite film and calculates the film thickness by measuring the time or angle of the laser reflection. This allows for rapid and accurate measurement of the composite film thickness and real-time display of the measurement results, facilitating timely adjustment of production parameters by operators. A mounting bracket 5 is rotatably connected to the bottom of the adjusting rod 4. Limiting rods 17 are slidably connected to the front and rear sides of the top of the support frame 3. The bottom ends of each limiting rod 17 are fixedly connected to the top of the mounting frame 5. A dust collection hood 6 is fixedly connected to the right side of the mounting frame 5. The height of the dust collection hood 6 is adjusted by rotating the adjusting rod 4, and it slides stably under the limitation of the limiting rod 17. A servo motor 7 is fixedly connected to the front side of the mounting frame 5. The output end of the servo motor 7 passes through the front side of the mounting frame 5 and is fixedly connected to a brush roller 8. When the brush roller 8 is in contact with the surface of the composite film, the servo motor 7 is activated to drive the brush roller 8 to rotate, thereby cleaning the surface layer of the composite film. A comb plate 9 is fixedly connected to the inner side of the dust collection hood 6. A comb plate 9 is installed on the inner side, which can scrape off the dust remaining on the brush roller 8 after cleaning, and finally fall into the dust collection hood 6. The right side of the dust collection hood 6 is connected to the dust collection pipe 10. The bottom inner side of the support frame 3 is equipped with a dust collection component. The top right end of the testing platform 1 is equipped with an unwinding component, and the top left end of the testing platform 1 is equipped with a winding component. The top of the testing platform 1 is equipped with a limit adjustment mechanism 2, which is used to tension and limit the composite membrane. The dust collection component includes a filter box 12, which is fixedly connected to the bottom inner side of the testing platform 1. The front side of the filter box 12 is connected to a connecting pipe 13. One end of 13 is connected to a vacuum cleaner 14. By starting the vacuum cleaner 14, a negative pressure is generated in the filter box 12. The rear side of the filter box 12 is connected to an air pipe 11. The right side of the filter box 12 is slidably connected to a filter plate 15. One end of the air pipe 11 passes through the top of the support frame 3 and is connected to a telescopic pipe 16. The bottom end of the telescopic pipe 16 is connected to the top of the vacuum pipe 10. Dust is injected into the filter box 12 through the air pipe 11 via the vacuum hood 6. The dust is filtered by the filter plate 15 in the filter box 12, and excess air is discharged from the other end of the vacuum cleaner 14, so as to achieve full treatment of dust on the surface of the composite membrane and improve detection accuracy.

[0032] Specifically, the support frame 3 is fixed to one side of the top of the inspection table 1 to connect the adjusting rod 4. The adjusting rod 4 not only provides vertical adjustment but also ensures the connection is secure. The laser thickness gauge 18 is installed on one side of the support frame 3. It uses a laser beam to irradiate the surface of the composite film and can quickly and accurately calculate the film thickness by precisely measuring the time or angle of the laser reflection. This design allows the device to respond quickly and display the measurement results in real time, providing great convenience for operators and enabling them to adjust production parameters in a timely manner to ensure product quality. The bottom end of the adjusting rod 4 is connected to the mounting frame 5 via a rotatable connection. This connection method allows the mounting frame 5 to be adjusted vertically. The device is highly mobile, and the top and front sides of the support frame 3 are slidably connected to limit rods 17. The bottom ends of these two limit rods 17 are fixed to the top of the mounting frame 5, which not only enhances the stability of the device but also ensures the smoothness and precision of the mounting frame 5 during movement. A dust collection hood 6 is fixed to the right side of the mounting frame 5. The height of the dust collection hood 6 can be adjusted by rotating the adjusting rod 4. Under the limiting action of the limit rods 17, the dust collection hood 6 can slide stably, thus adapting to composite films of different thicknesses. This design greatly improves the flexibility and adaptability of the device. A servo motor 7 is fixed to the front side of the mounting frame 5. The output end of the servo motor 7 passes through the front side of the mounting frame 5 and is firmly secured. The brush roller 8 is fixed in place. When the brush roller 8 is in close contact with the surface of the composite film, the servo motor 7 is activated to drive the brush roller 8 to rotate, thereby cleaning the surface layer of the composite film. This step is crucial for removing surface dust and impurities, ensuring the accuracy and reliability of subsequent inspections. A comb plate 9 is installed on the inner side of the dust collection hood 6. The scraping function of the comb plate 9 is used to thoroughly remove the dust remaining on the brush roller 8 after cleaning. The dust will eventually fall into the dust collection hood 6 and be transported to the dust collection assembly through the dust collection pipe 10 for processing. The dust collection assembly is set at the bottom inner side of the support frame 3. This assembly includes a filter box 12, a connecting pipe 13, a vacuum cleaner 14, and an air pump. The filter box 12 is fixed to the bottom inner side of the testing platform 1. Its front side is connected to the vacuum cleaner 14 via the connecting pipe 13. After the vacuum cleaner 14 is started, a negative pressure is generated inside the filter box 12, which draws the dust in the vacuum hood 6 into the filter box 12 through the air pipe 11 and the telescopic pipe 16. The filter plate 15 inside the filter box 12 filters the dust, while the excess air is discharged through the other end of the vacuum cleaner 14. This not only achieves thorough treatment of the dust on the surface of the composite membrane, but also greatly improves the testing accuracy. The top right end of the testing platform 1 is provided with an unwinding assembly for placing the composite membrane roll to be tested; the top left end is provided with a winding assembly for collecting the composite membrane roll after testing.In addition, a limit adjustment mechanism 2 is installed on the top of the testing station 1. This mechanism is used to tension and limit the composite film to ensure its flatness and stability during the testing process. This enables rapid and accurate measurement of the composite film thickness and thorough removal of surface dust. This device not only improves testing accuracy and efficiency but also provides great convenience for operators.

[0033] Reference Figure 1 , Figure 2 and Figure 5 The limit adjustment mechanism 2 includes a limit frame 201, which is fixedly connected to the top right end of the testing table 1. Limit grooves 202 are provided on both the front and rear sides of the limit frame 201. Slide plates 203 are slidably connected to the inner sides of both limit grooves 202. H-shaped frames 204 are fixedly connected between adjacent slide plates 203. The H-shaped frames 204 and the slide plates 203 on both sides are integrally formed, improving the stability of the H-shaped frames 204 and allowing them to slide stably up and down within the limit grooves 202 on the limit frame 201. A tensioning element is rotatably connected to the top inner side of the H-shaped frame 204. Roller 205, the stretching roller 205, is used to support the composite film during the transmission process and adjust the tension during transmission. Two adjusting rings 206 are slidably connected to the outer wall of the stretching roller 205. A bidirectional threaded rod 209 is rotatably connected to the front side of the H-frame 204. The rear end of the bidirectional threaded rod 209 passes through the front side of the H-frame 204 and is threadedly connected to two connecting plates 208. The connecting plates 208 and the adjusting rings 206 are integrally formed. The inner side of the adjusting rings 206 is made of wear-resistant material to improve wear resistance. The adjusting rings are synchronously driven by rotating the bidirectional threaded rod 209. Adjustment 206 is performed inward or outward to ensure precise delivery of the multilayer composite film and prevent deviation. A groove 207 is provided on the inner top of the H-shaped frame 204. The tops of the two connecting plates 208 penetrate the inner side of the groove 207 and are fixedly connected to the bottom of the outer wall of the adjusting ring 206. The limit adjustment mechanism 2 also includes two fixing plates 210, which are fixedly connected to the left and right sides inside the H-shaped frame 204. The H-shaped frame 204 and the fixing plates 210 are supported by a telescopic rod 211. The bottoms of the two fixing plates 210 are fixedly connected to load-bearing devices. The bottom ends of the two force-bearing cylinders 212 are fixedly connected to telescopic rods 211. Pressure sensors 213 are installed on the outer walls of the two force-bearing cylinders 212. At the same time, the force-bearing cylinders 212 are installed between the fixed plate 210 and the telescopic rods 211, and pressure sensors 213 are installed on the outer walls of the force-bearing cylinders 212. When the pressure of the composite film on the stretching roller 205 decreases, the pressure sensor 213 will determine that the composite film is loose and control the telescopic rods 211 to complete the rapid adjustment of tension. Through the above scheme, the accuracy of the multi-strand composite film before compression molding and testing is achieved.

[0034] Specifically, the limiting frame 201 is fixed to the top right end of the testing table 1, ensuring the stability of the entire mechanism. Limiting grooves 202 are designed on both the front and rear sides of the limiting frame 201. These grooves 202 provide precise guidance for the sliding of the slide plates 203. The two slide plates 203 can slide smoothly within the limiting grooves 202, ensuring the flexible operation of the mechanism. The slide plates 203 are connected by an H-shaped frame 204. This structure not only enhances the overall stability but also allows the H-shaped frame 204 to slide stably up and down within the limiting grooves 202 on the limiting frame 201. A rotatably connected tension roller 205 is designed on the inner top of the H-shaped frame 204, whose main function is to control the composite material during the transmission process. The membrane is supported and processed. The stretching roller 205 adjusts the tension of the conveyor to ensure the flatness and stability of the composite membrane during the conveying process. To further enhance the adjustment function, two adjusting rings 206 are slidably connected to the outer wall of the stretching roller 205. These two adjusting rings 206 can be precisely adjusted by rotation to accommodate composite membranes of different thicknesses and widths. The front side of the H-frame 204 is also designed with a bidirectional threaded rod 209, the rear end of which passes through the front side of the H-frame 204 and is threaded to two connecting plates 208. The connecting plates 208 and the adjusting rings 206 are integrally molded to ensure the structural strength and durability. The inner side of the adjusting rings 206 is made of wear-resistant material to improve its wear resistance. To ensure the accuracy and service life of the composite film, the adjusting ring 206 can be synchronously driven to adjust inward or outward by rotating the bidirectional threaded rod 209, thereby achieving precise delivery and effectively avoiding deviation during delivery. Furthermore, a groove 207 is provided on the inner top of the H-frame 204, and the tops of the two connecting plates 208 penetrate the inner side of the groove 207 and are fixedly connected to the bottom of the outer wall of the adjusting ring 206. This design further enhances the stability and adjustment precision of the mechanism. The limit adjustment mechanism 2 also includes two fixing plates 210, which are fixedly connected to the left and right sides inside the H-frame 204, providing additional support points for the mechanism. The H-frame 204 and the fixing plates 210... The two fixed plates 210 are supported by telescopic rods 211, ensuring the adaptability of the mechanism under different working conditions. The bottom of each fixed plate 210 is fixed with a force-bearing cylinder 212, and the bottom of each force-bearing cylinder 212 is fixed with a telescopic rod 211, ensuring the stability of the mechanism when subjected to the pressure of the composite film. A pressure sensor 213 is installed on the outer wall of the force-bearing cylinder 212. The pressure sensor 213 can monitor the pressure change of the composite film on the stretching roller 205 in real time. When it detects that the pressure of the composite film on the stretching roller 205 has decreased, the pressure sensor 213 will determine that the composite film has become loose and immediately control the telescopic rod 211 to complete the rapid adjustment of the tension to maintain the tension of the composite film in an ideal state.

[0035] Reference Figure 1 and Figure 2The unwinding assembly includes a roller frame 19, which is fixedly connected to the top right end of the inspection table 1. An unwinding roller 20 is rotatably connected to the inner side of the roller frame 19. The roller frame 19 is installed on one side of the inspection table 1, and the unwinding roller 20 is used to install and place the multi-strand composite film. The winding assembly includes a roller frame 21, which is fixedly connected to the top left end of the inspection table 1. A servo motor 23 is fixedly connected to the rear side of the roller frame 21. The output end of the servo motor 23 passes through the rear side of the roller frame 21 and is fixedly connected to a winding roller 22. When the servo motor 23 is started... When the servo motor 23 drives the take-up roller 22, the multi-strand composite film after testing will be recycled. The top of the testing table 1 is fixedly connected to the mounting frame 25, and the top of the mounting frame 25 is fixedly connected to the cylinder 26. One end of the cylinder 26 passes through the top of the mounting frame 25 and is fixedly connected to the extrusion roller 27. The inner bottom of the mounting frame 25 is rotatably connected to the roller column 24. In order to avoid air bubbles in the compression between the multi-strand composite films, the cylinder 26 is started to drive the extrusion roller 27 to perform secondary extrusion processing on the multi-strand composite film to ensure the accuracy of testing.

[0036] Specifically, roller frame 19 is firmly connected to the top right end of the inspection table 1. An unwinding roller 20 is rotatably connected to the inner side of roller frame 19. Its main function is to precisely install and place the multi-strand composite film using the unwinding roller 20. On the other hand, when servo motor 23 starts and drives the take-up roller 22, it effectively recycles the inspected multi-strand composite film, ensuring the smooth operation of the entire inspection process. Furthermore, a mounting frame 25 is fixed to the top of the inspection table 1. A cylinder 26 is fixedly connected to the top of the mounting frame 25. One end of the cylinder 26 passes through the top of the mounting frame 25 and is fixedly connected to the extrusion roller 27. A roller column 24 is installed at the bottom inner side of the mounting frame 25. To prevent air bubbles from forming during the compression process between the multi-strand composite films, the cylinder 26 is activated to drive the extrusion roller 27 to perform a secondary extrusion process on the multi-strand composite film. This process is crucial for ensuring the accuracy of the inspection.

[0037] Working principle: The height of the dust collection hood 6 is adjusted by rotating the adjusting rod 4 to accommodate composite film surfaces of different thicknesses. When the brush roller 8 is in contact with the surface of the composite film, the servo motor 7 is activated to drive the brush roller 8 to rotate, cleaning the dust on the surface of the composite film. Most of the dust flows into the dust collection hood 6. At the same time, the comb plate 9 scrapes off the dust remaining on the brush roller 8, and finally, all the dust falls into the dust collection hood 6. The vacuum cleaner 14 is activated to create negative pressure in the filter box 12, and the dust is injected into the filter box 12 through the air pipe 11 through the dust collection hood 6. The filter plate 15 in the filter box 12 filters the dust, and the excess air is discharged from the other end of the vacuum cleaner 14, achieving thorough treatment of the dust on the surface of the composite film. Finally, the laser thickness gauge 18 uses a laser beam to irradiate the surface of the composite film, and calculates the thickness of the film by measuring the time or angle of the laser reflection. The thickness of the composite film is measured quickly and accurately, and the measurement results can be displayed in real time, which is convenient for operators to adjust production parameters in a timely manner and improve the detection accuracy.

[0038] Furthermore, the stretching roller 205 supports the composite film during the transmission process, adjusting the tension during transmission. Depending on the size of the composite film, the rotating bidirectional threaded rod 209 synchronously drives the adjusting ring 206 to adjust inward or outward. The adjusting ring 206 prevents the multi-strand composite film from shifting. Simultaneously, when the pressure of the composite film on the stretching roller 205 decreases, the pressure sensor 213 detects that the composite film has become loose and controls the telescopic rod 211 to quickly adjust the tension. In this way, the accuracy of the multi-strand composite film before compression molding and testing is ensured.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-layer co-extrusion composite film on-line detection device, comprising a detection table (1), a support frame (3) and a laser thickness gauge (18), characterized in that: The top of the support frame (3) is threaded with an adjusting rod (4), and the bottom end of the adjusting rod (4) is rotatably connected to a mounting bracket (5). Limiting rods (17) are slidably connected to the front and rear sides of the top of the support frame (3). The bottom ends of the two limiting rods (17) are fixedly connected to the top of the mounting bracket (5). A dust collection cover (6) is fixedly connected to the right side of the mounting bracket (5). A servo motor (7) is fixedly connected to the front side of the mounting bracket (5). The output end of the servo motor (7) passes through the mounting bracket (5). (5) is fixedly connected to the front side of the brush roller (8), the dust collection hood (6) is fixedly connected to the inner side of the comb plate (9), the dust collection hood (6) is connected to the right side of the dust collection pipe (10), the bottom of the inner side of the support frame (3) is provided with a dust collection component, the top right end of the test platform (1) is provided with an unwinding component, the top left end of the test platform (1) is provided with a winding component, the top of the test platform (1) is provided with a limit adjustment mechanism (2), and the limit adjustment mechanism (2) is used to perform tensioning and limiting treatment on the composite film.

2. The on-line detection device for multilayer co-extrusion composite film according to claim 1, characterized in that: The limiting adjustment mechanism (2) includes a limiting frame (201), which is fixedly connected to the top right end of the detection table (1). Limiting grooves (202) are provided on both the front and rear sides of the limiting frame (201). Slide plates (203) are slidably connected to the inner sides of both limiting grooves (202). H-shaped frames (204) are fixedly connected between adjacent slide plates (203). A stretching roller (205) is rotatably connected to the top inner side of the H-shaped frame (204). Two adjusting rings (206) are slidably connected to the outer wall of the H-shaped frame (204). A two-way threaded rod (209) is rotatably connected to the front side of the H-shaped frame (204). The rear end of the two-way threaded rod (209) passes through the front side of the H-shaped frame (204) and is threadedly connected to two connecting plates (208). A sliding groove (207) is opened on the top of the inner side of the H-shaped frame (204). The tops of the two connecting plates (208) pass through the inner side of the sliding groove (207) and are fixedly connected to the bottom of the outer wall of the adjusting ring (206).

3. The online detection device for multilayer co-extruded composite films according to claim 2, characterized in that: The limit adjustment mechanism (2) also includes two fixing plates (210). The two fixing plates (210) are fixedly connected to the left and right sides inside the H-shaped frame (204). The bottom of the two fixing plates (210) is fixedly connected to a force-bearing cylinder (212). The bottom end of the two force-bearing cylinders (212) is fixedly connected to a telescopic rod (211). The outer wall of the two force-bearing cylinders (212) is equipped with a pressure sensor (213).

4. The online detection device for multilayer co-extruded composite films according to claim 1, characterized in that: The dust collection assembly includes a filter box (12), which is fixedly connected to the bottom inner side of the test platform (1). A connecting pipe (13) is connected to the front side of the filter box (12), and a vacuum cleaner (14) is connected to one end of the connecting pipe (13). An air pipe (11) is connected to the rear side of the filter box (12), and a filter plate (15) is slidably connected to the right side of the filter box (12).

5. The online detection device for multilayer co-extruded composite films according to claim 4, characterized in that: One end of the air pipe (11) passes through the top of the support frame (3) and is connected to the telescopic pipe (16), and the bottom end of the telescopic pipe (16) is connected to the top of the vacuum pipe (10).

6. The online detection device for multilayer co-extruded composite films according to claim 1, characterized in that: The unwinding assembly includes a roller frame (19), which is fixedly connected to the top right end of the inspection table (1), and an unwinding roller (20) is rotatably connected to the inner side of the roller frame (19).

7. The online detection device for multilayer co-extruded composite films according to claim 1, characterized in that: The winding assembly includes a second roller frame (21), which is fixedly connected to the top left end of the inspection table (1). A second servo motor (23) is fixedly connected to the rear side of the second roller frame (21). The output end of the second servo motor (23) passes through the rear side of the second roller frame (21) and is fixedly connected to a winding roller (22).

8. The online detection device for multilayer co-extruded composite films according to claim 1, characterized in that: The top of the testing platform (1) is fixedly connected to a second mounting frame (25), and the top of the second mounting frame (25) is fixedly connected to a cylinder (26). One end of the cylinder (26) passes through the top of the second mounting frame (25) and is fixedly connected to a squeezing roller (27). The bottom inner side of the second mounting frame (25) is rotatably connected to a roller column (24).

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