A device for detecting the surface flatness of polyvinyl chloride plastic film

Abstract

The invention discloses a device for detecting the surface flatness of a polyvinyl chloride plastic film, which belongs to the technical field of flatness detection. A first support frame is arranged on the top of the table, and a second support frame is arranged on the top of the first support frame; an upper swing plate is connected to the output end of the integrated motor, and a lower swing plate is arranged on the top of the rotating shaft; a linkage shaft is movably installed between the upper swing plate and the lower swing plate, and a lifting shaft is movably connected to the middle of the linkage shaft, and the linkage shaft is movably connected to the piston through the lifting shaft; a brush is arranged at the bottom of the rotating shaft, and multiple groups of sensors are fixedly arranged on the side of the piston; a fan is arranged on the outside of the swing frame, and an air duct inclined downward is arranged at the output end of the fan. The invention can drive the linkage shaft and the mounting seat to swing back and forth freely through the upper swing plate and the lower swing plate, thereby driving the piston to reciprocate along the lifting seat, and at this time, the piston drives the multiple groups of sensors on the lifting arm to reciprocate and detect the film to be tested below multiple times. The design is ingenious and effective, and improves the detection efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of flatness detection, in particular to a device for detecting the surface flatness of a polyvinyl chloride plastic film. Background Art

[0002] The main component of PVC is polyvinyl chloride, which is slightly yellow and translucent and shiny. The transparency is better than polyethylene and polypropylene, but worse than polystyrene. Depending on the amount of additives used, it is divided into soft and hard polyvinyl chloride. Soft products are soft and tough, and feel sticky. The hardness of hard products is higher than low-density polyethylene, but lower than polypropylene, and whitening will occur at the bends. Common products: plates, pipes, soles, toys, doors and windows, wire sheaths, stationery, etc. It is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene. When the film is produced, the film needs to be measured for parameters such as thickness and width after processing to determine the quality of the finished film.

[0003] The patent application with publication number CN118224988A discloses a film conveying thickness measuring device with self-cleaning function, which relates to the field of film technology, including a feeding roller, a receiving roller, a supporting roller and a thickness measuring device body, a dust removal plate and a dust suction plate are arranged between the two groups of the supporting rollers, an air inlet and an air outlet are arranged on both sides of the thickness measuring device body, an air suction pipe is arranged between the air inlet and the dust suction plate, and an air outlet pipe is arranged between the air outlet and the dust removal plate, and a heat dissipation component is arranged inside the thickness measuring device body, and an infrared detection module is arranged inside the side thickness device body, and an infrared detection probe is installed at the bottom of the infrared detection module, and the bottom of the infrared detection probe extends to the outer wall of the thickness measuring device body. The invention cleans the dust adsorbed on the surface of the film by arranging a heat dissipation component, a dust removal plate and a dust suction plate, so as to avoid the adsorption of dust on the surface of the film, which affects the film thickness measurement data, and improves the film thickness measurement effect.

[0004] However, the above-disclosed film thickness measuring device has a general degree of automation, is time-consuming and labor-intensive, cannot automatically clean and collect debris on the film surface, has a general degree of freedom, has poor applicability, and cannot adaptively adjust the swing amplitude of the fan according to the width of the film. Summary of the invention

[0005] The purpose of the present invention is to provide a device for detecting the surface flatness of a polyvinyl chloride plastic film in order to solve the problems that the existing film thickness measuring device has a general degree of automation, is time-consuming and labor-intensive, cannot automatically clean and collect debris on the surface of the film, has a general degree of freedom, poor applicability, and cannot adaptively adjust the swing amplitude of the fan according to the width of the film.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present invention is: a device for detecting the surface flatness of a polyvinyl chloride plastic film, comprising a detection platform, a detection mechanism and a cleaning mechanism, wherein the detection platform comprises a table, a first support frame is arranged on the top of the table, and a second support frame is arranged on the top of the first support frame; the detection mechanism comprises an integrated motor installed on the second support frame, and an output end of the integrated motor is connected with an inclined upper swing plate; a rotating shaft is rotatably arranged on the first support frame, and a lower swing plate cooperating with the upper swing plate is arranged on the top of the rotating shaft; a linkage shaft is movably installed between the upper swing plate and the lower swing plate, and a lifting shaft is movably connected to the middle part of the linkage shaft, and a piston is also movably arranged on the first support frame, and the linkage shaft is movably connected to the piston through the lifting shaft; a brush is arranged at the bottom of the rotating shaft, and multiple groups of sensors are fixedly arranged on the side of the piston; the cleaning mechanism comprises a swing frame movably arranged on the table, a fan is installed on the outer side of the swing frame, and an air duct inclined downward is arranged at the output end of the fan.

[0007] As a further solution of the present invention: the cleaning mechanism also includes an adjustment seat fixedly arranged on the table top, a moving block is slidably arranged inside the adjustment seat, symmetrical lifting slide rails are movably arranged on both sides of the moving block, a horizontal frame is also arranged under the table top, symmetrical vertical plates are arranged on the horizontal frame, a lifting motor is installed on the outer side of the vertical plate, a slider is slidably arranged inside the lifting slide rail, the output end of the lifting motor is connected to a crankshaft, and the other end of the crankshaft is movably connected to the slider.

[0008] As a further solution of the present invention: a sliding cavity is opened inside the adjustment seat, the movement block is slidably arranged in the sliding cavity, and a threaded rod is movably arranged in the middle of the adjustment seat, and the threaded rod penetrates the movement block and is threadedly connected thereto.

[0009] As a further solution of the present invention: a handle is arranged on the outer side of the threaded rod, swing shafts are arranged on both sides of the moving block, and the lifting slide rail is movably arranged on the swing shafts.

[0010] As a further solution of the present invention: a hinge is arranged on the table top, a swing cavity cooperating therewith is arranged on the swing frame, and a limit plate cooperating therewith is also arranged on the table top.

[0011] As a further solution of the present invention: a mounting seat is fixedly arranged in the middle of the linkage shaft, a swing seat is also arranged on the top of the mounting seat, a ball seat is movably installed in the middle of the swing seat, and a spherical meshing cavity is opened inside the ball seat; a universal seat is also rotatably installed on the top of the piston, and an meshing ball movably arranged in the meshing cavity is arranged on the top of the lifting shaft.

[0012] As a further solution of the present invention: a lifting seat cooperating with the piston is arranged on the first support frame, and a penetrating groove is provided on the lifting seat and the first support frame; a lifting arm is fixedly arranged on the outer wall of the piston, and the lifting arm is movably arranged in the groove, and a horizontal plate is arranged at the bottom of the lifting arm, and multiple groups of sensors are installed on the horizontal plate.

[0013] As a further solution of the present invention: fixed rollers are rotatably provided on both sides of the first support frame, symmetrical positioning seats are provided on both sides of the table top, swing arms are movably provided on the inner sides of the positioning seats, moving rollers cooperating with the fixed rollers are provided between the swing arms, a film to be tested is provided between the fixed rollers and the moving rollers, and a reset spring is also provided on the table top, and the top of the reset spring is connected to the swing arm.

[0014] As a further solution of the present invention: a collecting box is further provided at the bottom of the detection platform, and an arc plate is provided on the side of the collecting box.

[0015] As a further solution of the present invention: a bearing cooperating with the rotating shaft is arranged on the first supporting frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can drive the linkage shaft and the mounting seat to swing back and forth freely through the upper swing plate and the lower swing plate, and the mounting seat swings back and forth up and down while intermittently rotating left and right. Thereby driving the piston at the bottom to reciprocate along the lifting seat on the first support frame, and at this time the piston drives the multiple sets of sensors on the lifting arm to reciprocate and detect the film to be tested below multiple times. This design is ingenious and effective, and improves the detection efficiency of the polyvinyl chloride plastic film surface flatness detection device.

[0018] 2. The present invention can clean the surface of the film to be tested by the rotating shaft and the brush, and under the blowing of the fan and the air duct, dust and other impurities will fall into the collection box. Under the lifting of the lifting slide rail, the swing frame can be lifted upward, and the inclined air duct can start to blow from the outside of the film to be tested. When it reaches the highest point, the air duct can blow the inside of the film to be tested. The position of the moving block in the adjustment seat can be adjusted by the screw rod, so as to further adjust the swing amplitude of the lifting slide rail, so as to adaptively adjust the highest point of the air duct according to the width of the film to be tested. This design is ingenious and effective, which greatly improves the degree of freedom and cleaning effect of the polyvinyl chloride plastic film surface flatness detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1The three-dimensional structure of the present invention Figure 1 ;

[0021] Figure 2 It is a three-dimensional structural diagram of the detection platform in the present invention;

[0022] Figure 3 It is a partial three-dimensional structural diagram of the detection mechanism in the present invention;

[0023] Figure 4 It is a three-dimensional structural diagram of the linkage shaft in the present invention;

[0024] Figure 5 It is a partial three-dimensional structural diagram of the lifting shaft in the present invention;

[0025] Figure 6 The three-dimensional structure of the present invention Figure 2 ;

[0026] Figure 7 yes Figure 6 A magnified view of the structure at center A;

[0027] Figure 8 It is a three-dimensional structural diagram of the swing frame in the present invention.

[0028] Description of reference numerals:

[0029] 1. Testing table; 101. Table; 102. First support frame; 103. Second support frame; 104. Fixed roller; 105. Positioning seat; 106. Swing arm; 107. Moving roller; 108. Return spring; 109. Collection box; 110. Arc plate; 111. Film to be tested;

[0030] 2. Detection mechanism; 201. Integrated motor; 202. Upper swing plate; 203. Rotating shaft; 204. Bearing; 205. Lower swing plate; 206. Brush; 207. Linkage shaft; 208. Mounting seat; 209. Swinging seat; 210. Ball seat; 211. Engaging cavity; 212. Lifting seat; 213. Slot; 214. Piston; 215. Universal seat; 216. Lifting shaft; 217. Engaging ball; 218. Lifting arm; 219. Horizontal plate; 220. Sensor;

[0031] 3. Cleaning mechanism; 301. Adjusting seat; 302. Sliding cavity; 303. Threaded rod; 304. Handle; 305. Moving block; 306. Swinging shaft; 307. Lifting slide rail; 308. Sliding block; 309. Horizontal frame; 310. Vertical plate; 311. Lifting motor; 312. Crankshaft; 313. Hinge; 314. Limiting plate; 315. Swinging frame; 316. Swinging cavity; 317. Fan; 318. Air duct. DETAILED DESCRIPTION

[0032] The following will be combined with the attached Figures 1 to 8 The technical solution of the present invention is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides a device for detecting the surface flatness of a polyvinyl chloride plastic film by improvement. Figure 1-Figure 8 As shown, it includes a detection table 1, a detection mechanism 2 and a cleaning mechanism 3. The detection table 1 includes a table top 101, a first support frame 102 is arranged on the top of the table top 101, and a second support frame 103 is arranged on the top of the first support frame 102; the detection mechanism 2 includes an integrated motor 201 installed on the second support frame 103, and the output end of the integrated motor 201 is connected to an inclined upper swing plate 202; a rotating shaft 203 is rotatably arranged on the first support frame 102, and a lower swing plate 205 cooperating with the upper swing plate 202 is arranged on the top of the rotating shaft 203; the upper swing plate 202 and the lower swing plate 205 are connected to the upper swing plate 202. A linkage shaft 207 is movably installed between the movable plates 205, and a lifting shaft 216 is movably connected to the middle part of the linkage shaft 207. A piston 214 is also movably arranged on the first support frame 102, and the linkage shaft 207 is movably connected to the piston 214 through the lifting shaft 216; a brush 206 is arranged at the bottom of the rotating shaft 203, and a plurality of groups of sensors 220 are fixedly arranged on the side of the piston 214; the cleaning mechanism 3 includes a swing frame 315 movably arranged on the table 101, a fan 317 is installed on the outer side of the swing frame 315, and an air duct 318 inclined downward is arranged at the output end of the fan 317.

[0034] In this embodiment: the polyvinyl chloride plastic film surface flatness detection device is mainly divided into three parts: a detection platform 1, a detection mechanism 2 and a cleaning mechanism 3. When the device is used, the film 111 to be tested is first passed between the fixed roller 104 and the moving roller 107, and then the fixed rollers 104 on both sides are driven to rotate by an external driving device. When the integrated motor 201 drives the upper swing plate 202 to rotate, the rotating shaft 203 will also rotate relative to the first support frame 102 under the drive of the upper swing plate 202 and the lower swing plate 205. In addition, the upper swing plate 202 and the lower swing plate 205 can also drive the linkage shaft 207 and the mounting seat 208 to swing back and forth freely, and the mounting seat 208 swings back and forth up and down while intermittently reversing rotation left and right, thereby driving the piston 214 at the bottom to reciprocate along the first support frame 102. At this time, the brush at the bottom of the rotating shaft 203 will clean the surface of the film 111 to be tested, and the multiple groups of sensors 220 on the side of the piston 214 will reciprocate up and down to perform multiple tests on the flatness of the film. When the lifting motor 311 drives the slider 308 to rotate through the crankshaft 312, the lifting rail 307 will swing back and forth up and down with the swing shaft 306 as the axis. Under the lifting of the lifting rail 307, the swing frame 315 can be lifted upward, and the inclined air duct 318 can start to blow from the outside of the film 111 to be tested. When it reaches the highest point, the air duct 318 can blow from the inside of the film 111 to be tested.

[0035] See attached Figure 6 -Attached Figure 7 The cleaning mechanism 3 further includes an adjustment seat 301 fixedly arranged on the table 101, a moving block 305 is slidably arranged inside the adjustment seat 301, and symmetrical lifting rails 307 are movably arranged on both sides of the moving block 305. A horizontal frame 309 is also arranged below the table 101, and a symmetrical vertical plate 310 is arranged on the horizontal frame 309. A lifting motor 311 is installed on the outer side of the vertical plate 310. A slider 308 is slidably arranged inside the lifting rail 307, and a crankshaft 312 is connected to the output end of the lifting motor 311, and the other end of the crankshaft 312 is movably connected to the slider 308. A sliding cavity 302 is opened inside the adjustment seat 301, and the moving block 305 is slidably arranged in the sliding cavity 302. A threaded rod 303 is movably arranged in the middle of the adjustment seat 301, and the threaded rod 303 penetrates the moving block 305 and is threadedly connected thereto.

[0036] In this embodiment, when the lifting motor 311 drives the slider 308 to rotate via the crankshaft 312, the lifting rail 307 will swing back and forth up and down with the swing shaft 306 as the axis. Therefore, when the position of the moving block 305 in the adjustment seat 301 is adjusted, that is, the position of the swing shaft 306 relative to the lifting motor 311, the swing amplitude of the lifting rail 307 can be adjusted, so as to lift the swing frame 315.

[0037] See attached Figure 6 -Attached Figure 7 A handle 304 is provided on the outer side of the threaded rod 303 , swing shafts 306 are provided on both sides of the moving block 305 , and a lifting slide rail 307 is movably provided on the swing shaft 306 .

[0038] In this embodiment, since the threaded rod 303 passes through the moving block 305 and is threadedly connected thereto, a handle 304 structure is designed to facilitate the rotation of the threaded rod 303 and further adjust the position of the moving block 305 in the adjustment seat 301.

[0039] See attached Figure 2 A hinge 313 is provided on the table top 101 , a swing cavity 316 cooperating therewith is provided on the swing frame 315 , and a limit plate 314 cooperating therewith is also provided on the table top 101 .

[0040] In this embodiment, a hinge 313 is provided to ensure that the swing frame 315 swings upward relative to the table 101. A limit plate 314 is provided to limit the swing frame 315 to avoid accidental downward swinging in order to ensure that the fan 317 on the swing frame 315 blows the upper surface of the film 111 to be tested.

[0041] See attached Figure 3 -Attached Figure 5 A mounting seat 208 is fixedly arranged in the middle of the linkage shaft 207, and a swing seat 209 is also arranged on the top of the mounting seat 208. A ball seat 210 is movably installed in the middle of the swing seat 209, and a spherical meshing cavity 211 is opened inside the ball seat 210; a universal seat 215 is also rotatably installed on the top of the piston 214, and an meshing ball 217 movably arranged in the meshing cavity 211 is arranged on the top of the lifting shaft 216.

[0042] In this embodiment, when the integrated motor 201 drives the upper swing plate 202 to rotate, the rotating shaft 203 will also rotate relative to the first support frame 102 under the drive of the upper swing plate 202 and the lower swing plate 205. In addition, the upper swing plate 202 and the lower swing plate 205 can also drive the linkage shaft 207 and the mounting seat 208 to swing back and forth freely, and the mounting seat 208 swings back and forth up and down while intermittently rotating left and right, thereby driving the piston 214 at the bottom to reciprocate along the first support frame 102.

[0043] See attached Figure 2 -Attached Figure 3A lifting seat 212 cooperating with the piston 214 is provided on the first support frame 102, and a through slot 213 is provided on the lifting seat 212 and the first support frame 102; a lifting arm 218 is fixedly provided on the outer wall of the piston 214, and the lifting arm 218 is movably provided in the slot 213, and a cross plate 219 is provided at the bottom of the lifting arm 218, and multiple sets of sensors 220 are installed on the cross plate 219.

[0044] In this embodiment: when the piston 214 reciprocates up and down along the first support frame 102, a lifting seat 212 is designed to further improve the stability during movement. During the detection operation, the surface of the film 111 to be tested must be cleaned first, then the impurities must be cleaned, and finally the film must be tested for flatness, so the fan 317 and the air duct 318 are located between the brush 206 and the horizontal plate 219. In order to further improve the reliability of the detection result and avoid errors, multiple sets of sensors 220 are designed.

[0045] See attached Figure 1 -Attached Figure 3 Fixed rollers 104 are rotatably provided on both sides of the first support frame 102, symmetrical positioning seats 105 are provided on both sides of the table 101, swing arms 106 are movably provided on the inner sides of the positioning seats 105, and moving rollers 107 cooperating with the fixed rollers 104 are provided between the swing arms 106, and a film 111 to be tested is provided between the fixed rollers 104 and the moving rollers 107. A reset spring 108 is also provided on the table 101, and the top of the reset spring 108 is connected to the swing arm 106.

[0046] In this embodiment, in order to prevent wrinkles in the film 111 to be tested, two sets of fixed rollers 104 and moving rollers 107 are designed to tighten the film. The return spring 108 can make the moving roller 107 close to the film, thereby meeting the requirements of the film 111 to be tested with different thicknesses.

[0047] See attached Figure 1 -Attached Figure 2 and attached Figure 6 A collecting box 109 is also provided at the bottom of the testing platform 1 , and an arc plate 110 is provided on the side of the collecting box 109 .

[0048] In this embodiment, in order to avoid interference with the test results and reduce errors, impurities or dust on the surface of the film 111 to be tested will be separated from the film by the rotation and cleaning of the brush 206, and at this time, the impurities will fall into the collection box 109 under the blowing of the fan 317 and the air duct 318. In order to further improve the collection effect, an arc plate 110 is designed.

[0049] See attached Figure 1 -Attached Figure 2 A bearing 204 that cooperates with the rotating shaft 203 is provided on the first support frame 102 .

[0050] In this embodiment, in order to ensure that the rotating shaft 203 and the brush 206 can rotate freely relative to the first support frame 102 so as to clean the film 111 to be tested, a bearing 204 is designed.

[0051] In this embodiment: when the device is used, the film 111 to be tested is first passed between the fixed roller 104 and the moving roller 107, and then the fixed rollers 104 on both sides are driven to rotate by an external driving device. When the integrated motor 201 drives the upper swing plate 202 to rotate, the rotating shaft 203 will also rotate relative to the first support frame 102 under the drive of the upper swing plate 202 and the lower swing plate 205. In addition, the upper swing plate 202 and the lower swing plate 205 can also drive the linkage shaft 207 and the mounting seat 208 to swing back and forth freely, and the mounting seat 208 swings back and forth up and down while intermittently reversing rotation left and right, thereby driving the piston 214 at the bottom to reciprocate along the first support frame 102. At this time, the brush at the bottom of the rotating shaft 203 will clean the surface of the film 111 to be tested, and the multiple sets of sensors 220 on the side of the piston 214 will reciprocate up and down to perform multiple tests on the flatness of the film. When the lifting motor 311 drives the slider 308 to rotate through the crankshaft 312, the lifting rail 307 will swing back and forth up and down with the swing shaft 306 as the axis. Under the lifting of the lifting rail 307, the swing frame 315 can be lifted upward, and the inclined air duct 318 can start to blow from the outside of the film 111 to be tested. When it reaches the highest point, the air duct 318 can blow from the inside of the film 111 to be tested.

[0052] For films 111 of different widths to be tested, when the swing amplitude of the swing frame 315 needs to be adjusted, the threaded rod 303 is rotated by the handle 304. When the motion block 305 slides inward, that is, closer to the lifting motor 311, the swing amplitude of the lifting rail 307 becomes larger, thereby meeting the needs of wider films. When the motion block 305 slides outward, that is, farther away from the lifting motor 311, the swing amplitude of the lifting rail 307 becomes smaller.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. A device for detecting the surface flatness of a polyvinyl chloride plastic film, comprising a detection platform (1), a detection mechanism (2) and a cleaning mechanism (3), characterized in that: The detection table (1) comprises a table top (101), a first support frame (102) is arranged on the top of the table top (101), and a second support frame (103) is arranged on the top of the first support frame (102); The detection mechanism (2) comprises an integrated motor (201) mounted on the second support frame (103), the output end of the integrated motor (201) being connected to an inclined upper swing plate (202); a rotating shaft (203) being rotatably arranged on the first support frame (102), a lower swing plate (205) cooperating with the upper swing plate (202) being arranged on the top of the rotating shaft (203); a linkage shaft (207) being movably arranged between the upper swing plate (202) and the lower swing plate (205), a lifting shaft (216) being movably connected to the middle part of the linkage shaft (207), a piston (214) being movably arranged on the first support frame (102), the linkage shaft (207) being movably connected to the piston (214) via the lifting shaft (216); a brush (206) being arranged at the bottom of the rotating shaft (203), and a plurality of groups of sensors (220) being fixedly arranged on the side of the piston (214); The cleaning mechanism (3) comprises a swing frame (315) movably arranged on the table top (101), a fan (317) is installed on the outer side of the swing frame (315), and an air duct (318) inclined downward is arranged at the output end of the fan (317); the cleaning mechanism (3) also comprises an adjustment seat (301) fixedly arranged on the table top (101), a moving block (305) is slidably arranged inside the adjustment seat (301), and symmetrical lifting slide rails (307) are movably arranged on both sides of the moving block (305), and the table top (101) is provided with a plurality of movable rails (307). 01), a horizontal frame (309) is also arranged below the lifting rail (307), and a symmetrical vertical plate (310) is arranged on the horizontal frame (309), and a lifting motor (311) is installed on the outer side of the vertical plate (310), and a slider (308) is slidably arranged inside the lifting rail (307), and the output end of the lifting motor (311) is connected to a crankshaft (312), and the other end of the crankshaft (312) is movably connected to the slider (308); under the lifting of the lifting rail (307), the swing frame (315) drives the air duct (318) to swing up and down.

2. A polyvinyl chloride plastic film surface flatness detection device according to claim 1, characterized in that: The adjusting seat (301) has a sliding cavity (302) formed inside, and the moving block (305) is slidably arranged in the sliding cavity (302). A threaded rod (303) is movably arranged in the middle of the adjusting seat (301), and the threaded rod (303) passes through the moving block (305) and is threadedly connected thereto.

3. A device for detecting the surface flatness of a polyvinyl chloride plastic film according to claim 2, characterized in that: A handle (304) is arranged on the outer side of the threaded rod (303), swing shafts (306) are arranged on both sides of the moving block (305), and the lifting slide rail (307) is movably arranged on the swing shaft (306).

4. A device for detecting the surface flatness of a polyvinyl chloride plastic film according to any one of claims 1 to 3, characterized in that: The table top (101) is provided with a hinge (313), the swing frame (315) is provided with a swing cavity (316) matched therewith, and the table top (101) is also provided with a limit plate (314) matched therewith.

5. A polyvinyl chloride plastic film surface flatness detection device according to claim 1, characterized in that: A mounting seat (208) is fixedly arranged in the middle of the linkage shaft (207), a swing seat (209) is also arranged on the top of the mounting seat (208), a ball seat (210) is movably arranged in the middle of the swing seat (209), and a spherical meshing cavity (211) is provided inside the ball seat (210); a universal seat (215) is also rotatably arranged on the top of the piston (214), and a meshing ball (217) movably arranged in the meshing cavity (211) is arranged on the top of the lifting shaft (216).

6. A device for detecting the surface flatness of a polyvinyl chloride plastic film according to any one of claims 1 to 3, characterized in that: The first support frame (102) is provided with a lifting seat (212) cooperating with the piston (214), and the lifting seat (212) and the first support frame (102) are provided with a through slot (213); a lifting arm (218) is fixedly provided on the outer wall of the piston (214), and the lifting arm (218) is movably provided in the slot (213), and a cross plate (219) is provided at the bottom of the lifting arm (218), and a plurality of groups of sensors (220) are installed on the cross plate (219).

7. A device for detecting the surface flatness of a polyvinyl chloride plastic film according to any one of claims 1 to 3, characterized in that: Fixed rollers (104) are rotatably arranged on both sides of the first support frame (102); symmetrical positioning seats (105) are arranged on both sides of the table top (101); swing arms (106) are movably arranged inside the positioning seats (105); a moving roller (107) cooperating with the fixed roller (104) is arranged between the swing arms (106); a film (111) to be tested is arranged between the fixed roller (104) and the moving roller (107); a reset spring (108) is also arranged on the table top (101); and the top of the reset spring (108) is connected to the swing arm (106).

8. A device for detecting the surface flatness of a polyvinyl chloride plastic film according to any one of claims 1 to 3, characterized in that: A collection box (109) is also provided at the bottom of the detection platform (1), and an arc plate (110) is provided on the side of the collection box (109).

9. A device for detecting the surface flatness of a polyvinyl chloride plastic film according to any one of claims 1 to 3, characterized in that: The first support frame (102) is provided with a bearing (204) that cooperates with the rotating shaft (203).

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