Non-contact cast film surface stain and defect dynamic detection device

Abstract

The invention relates to the technical field of defect detection equipment, and discloses a non-contact cast film surface stain and defect dynamic detection device, a formed cast film passes through the lower ends of two groups of limiting rollers and is flatly spread on the top surface of a stainless steel plate after being lifted by an auxiliary roller, and the front end of the cast film is clamped and pulled by a feeding roller to continuously advance; a hydraulic rod adjusts a CCD camera at the bottom of a transverse plate to a proper height and then is fixed, rotating rods at the four corners of a mounting plate synchronously rotate through a second chain, a second gear, a first chain and a first gear through a driving motor to drive spiral strips and spiral sponges to press the two sides of the edge of a film body, and during rotation, a spiral structure pulls the film body towards the outer sides of the four corners; meanwhile, the spiral sponge rotates to wipe and clean the membrane surface; and finally, the CCD camera array shoots the surface image of the film body in a non-contact manner to realize stain and defect detection. The spiral sponge is driven by the spiral strip to dynamically tension and clean, so that scratches of a traditional tensioning roller are avoided, and high-precision detection of the surface of the cast film in a new material is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of defect detection equipment technology, and in particular to a non-contact dynamic detection device for stains and defects on the surface of cast film. Background Technology

[0002] Cast film, as a rapidly developing new type of functional material in recent years, possesses high-performance characteristics that are difficult for traditional films to match due to its unique melt casting and rapid cooling process, enabling precise control of molecular arrangement and microstructure. It has become an important branch with great development potential in the field of new materials. It has not only achieved quality upgrades in traditional fields such as food preservation and pharmaceutical packaging, but also demonstrated a key supporting role in high-end new material applications such as new energy battery separators, flexible electronic substrates, and biomedical protective films. Furthermore, real-time dynamic monitoring of surface stains and defects during its continuous production process is a crucial foundation for ensuring the product quality stability of this new material and promoting its application in a wider range of fields.

[0003] Patent CN119044064B discloses an optical film defect detection device and method, including a frame, a CCD camera, a light panel, conveyor rollers, a motor, and leveling and centering mechanisms. The frame has adjustment cavities on both sides, a CCD camera mounted at the top, and a light panel below it to provide a detection light source. The conveyor rollers at both ends of the frame are driven by motors and are responsible for transporting the optical film. The leveling mechanism is located on both sides of the frame, and the leveling plate connected to the adjustment cavities reciprocates under the drive of the leveling mechanism during transport. The centering mechanism is located in front of the leveling mechanism; when the leveling plate reciprocates, it drives the centering plate to complete the centering displacement. This ensures that the optical film remains centered and flat during detection, effectively improving the quality of defect detection.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: When existing testing equipment uses a tensioning roller to tension and flatten the membrane, spiral scrapers with different rotation directions are set at both ends of its outer wall. When the tensioning roller rotates, it scrapes and tensions the membrane to both sides. However, the spiral scrapers on the outer wall of the tensioning roller are prone to causing rotational cuts to the membrane when it is squeezed. At the same time, when the scraping is obstructed, it is easy to cause shaking scratches to the membrane. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing technology has the disadvantage that when the tensioning roller tensions the film through the spiral scraper with different directions at both ends of the outer wall, it is easy to generate rotational scratches due to compression, and when the scraping is obstructed, it is also easy to cause shaking scratches. To this end, we propose a non-contact dynamic detection device for stains and defects on the surface of cast film.

[0006] To achieve the above objectives, this application adopts the following technical solution: a non-contact dynamic detection device for stains and defects on the surface of cast film, comprising a base and a stainless steel plate fixedly connected to the top of the base. Limiting rollers are fixedly connected to both ends of the top of the stainless steel plate. Support columns are fixedly connected to both sides of the top of the stainless steel plate between the limiting rollers. A mounting plate is fixedly connected to the end of the support columns. Hydraulic rods are fixedly connected to both sides of the lower middle part of the mounting plate. A horizontal plate is fixedly connected to the bottom of the hydraulic rods. CCD cameras are evenly spaced at the lower end of the horizontal plate and suspended above the stainless steel plate. Rotating rods are movably inserted through the four corners of the mounting plate. A first gear is fixedly connected to the outer wall of each rotating rod above the mounting plate. A spiral strip is fixedly connected to the bottom of the rotating rod below the mounting plate. A spiral sponge is fixedly connected to the bottom of the spiral strip. A first chain is fitted onto the outer wall of the first gear. A second gear is fixedly connected to the outer wall of the rotating rod above one of the first gears. A second chain is fitted onto the outer wall of the second gear. A driving component is connected to the other end of the second chain. Feeding rollers and auxiliary rollers are fixedly connected to the top of the base on both sides of the stainless steel plate.

[0007] Preferably, the driving component includes a gantry frame fixedly connected to the top of the mounting plate, a drive motor fixedly connected to the lower end of the top plate of the gantry frame, a drive gear fixedly connected to the outer wall at the bottom of the drive motor transmission shaft, and a movable sleeve on the outer wall of the drive gear at the end of the second chain away from the second gear.

[0008] Preferably, movable columns are rotatably connected to the center edges of the top perimeter of the mounting plate, and the movable ring of the middle section of the first chain between adjacent first gears is fitted onto the outer wall of the movable column, and the movable column bends inward to tension the first chain.

[0009] Preferably, the rotating rod includes an outer sleeve rod that is movably installed through the mounting plate and an elastic component that is fixedly connected to the top of the inner cavity of the outer sleeve rod. An inner sleeve rod is fixedly connected to the lower end of the elastic component. The lower end of the inner sleeve rod extends to below the bottom port of the outer sleeve rod. A hanging rod is fixedly connected to the bottom of the inner sleeve rod outside the outer sleeve rod. The lower end of the hanging rod is fixedly connected to the spiral strip.

[0010] Preferably, receiving grooves are respectively provided on the inner walls of both sides of the inner cavity of the outer sleeve rod, and a deflection block is movably connected between the inner walls at the top of the receiving groove. A first magnetic block is embedded on the outer wall of the deflection block on the side away from the elastic component. A movable ring is threaded on the outer wall of the outer sleeve rod corresponding to the receiving groove, and a second magnetic block is fixedly connected on the inner walls of both sides of the movable ring corresponding to the deflection block.

[0011] Preferably, when the movable ring is located at the bottom end of the thread on the outer wall of the outer sleeve rod, the second magnetic block and the first magnetic block are on the same horizontal line, and the same magnetic poles of the second magnetic block and the first magnetic block are set opposite each other.

[0012] Preferably, the auxiliary roller includes a mounting base fixedly connected to both sides of the top of the base and a support roller movably disposed between the side walls at the top of the mounting base, with side baffles fixedly connected to the outer walls of both ends of the support roller.

[0013] Preferably, the idler roller includes an inner cylinder and a shaft fixedly connected to the outer wall of the inner cylinder end. The end of the shaft is movably disposed through the side wall of the mounting seat. A threaded rod is movably disposed between the inner walls of the inner cylinder. Movable sleeves are threadedly connected to the outer walls of both ends of the threaded rod. Deflecting rods are movably connected at even intervals on the outer walls of the movable sleeves. Movable plates are movably disposed at even intervals on the outer walls of the inner cylinder corresponding to the deflecting rods. The end of the movable plate inside the inner cylinder is movably connected to the other end of the deflecting rod. An arc-shaped plate is fixedly connected to the end of the movable plate outside the inner cylinder. An elastic sleeve is sleeved on the outer wall of the arc-shaped plate.

[0014] Preferably, both ends of the threaded rod extend into the interior of the shafts on both sides of the inner cylinder, and one end of the threaded rod extends movably through to the outside of the shaft end on one side of the inner cylinder.

[0015] Preferably, the limiting roller includes a U-shaped plate and L-shaped seats fixedly connected to the top two sides of the U-shaped plate. The bottom of the L-shaped seats is fixedly connected to the top two sides of the stainless steel plate. Fixed plates are fixedly connected at even intervals on the bottom plate of the U-shaped plate. Rollers are movably arranged between the side walls of the fixed plates. The lower end of the rollers movably extends through to the bottom of the U-shaped plate.

[0016] The technical effects and advantages of this invention are as follows:

[0017] In this invention, after the formed film is lifted by auxiliary rollers, it passes under the two sets of limiting rollers and is laid flat on the top surface of a smooth stainless steel plate. The front end of the film is continuously pulled forward by the rolling clamp of the feeding roller. At this time, the hydraulic rod at the bottom of the mounting plate adjusts the height of the CCD camera at the bottom of the horizontal plate and the top surface of the film, and after appropriate focus adjustment, it maintains the working height. The drive motor starts, and through the cooperation of the drive gear, the second chain and the second gear, it drives the rotating rod at one corner of the mounting plate to rotate. Then, under the drive of the first gear and the first chain, it simultaneously pushes the four sets of rotating rods at the four corners of the mounting plate to rotate synchronously. The four sets of rotating rods push four spiral strips carrying spiral sponges to press them against the sides of the film near the edge. Since the rotating rods are all set off from vertical, With the center of gravity of the four spiral strips located on both sides of the center of the film along the axial direction of the limiting roller, the spiral sponge presses the film together and uses the rotational motion to slide and pull the film outwards from the four corners, evenly tensioning and expanding the film on the top surface of the stainless steel plate. This creates a wrinkle-free and stable planar condition for the CCD camera array to perform optical image capture and detection across the entire width of the film. The rotating wiping of the spiral sponge cleans the film surface simultaneously and completely avoids the rotational cuts and vibration scratches of traditional tensioning rollers. The elastic contact mechanism and the non-contact detection method of the CCD camera array eliminate secondary contamination, providing a reliable guarantee for the dynamic detection of surface stains and defects in the cast film of new materials. Attached Figure Description

[0018] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0019] Figure 1 This is a schematic diagram of the overall structure of a non-contact dynamic detection device for surface stains and defects of cast film according to the present invention.

[0020] Figure 2 This is a schematic diagram of the installation structure of a non-contact dynamic detection device for surface stains and defects of cast film according to the present invention, including a stainless steel plate, mounting plate, CCD camera, etc.

[0021] Figure 3 This is a schematic diagram of the installation structure of the rotating rod, spiral strip, etc., of a non-contact dynamic detection device for surface stains and defects of cast film according to the present invention.

[0022] Figure 4 This invention relates to a non-contact dynamic detection device for stains and defects on the surface of cast film. Figure 2 Enlarged structural diagram at point A in the middle;

[0023] Figure 5 This invention relates to a non-contact dynamic detection device for stains and defects on the surface of cast film. Figure 2 Enlarged structural diagram at point B;

[0024] Figure 6 This is a schematic diagram of the rotating rod cross-section of a non-contact dynamic detection device for stains and defects on the surface of a cast film according to the present invention;

[0025] Figure 7 This is a schematic diagram of the auxiliary roller structure of a non-contact dynamic detection device for surface stains and defects of cast film according to the present invention;

[0026] Figure 8 This is a schematic diagram of the longitudinal section of the roller of a non-contact dynamic detection device for stains and defects on the surface of cast film according to the present invention;

[0027] Figure 9 This is a schematic diagram of the transverse cross section of the roller of a non-contact dynamic detection device for stains and defects on the surface of cast film according to the present invention;

[0028] Figure 10 This is a schematic diagram of the limiting roller structure of a non-contact dynamic detection device for stains and defects on the surface of cast film according to the present invention;

[0029] Figure 11 This is a schematic diagram of the feeding roller structure of a non-contact dynamic detection device for stains and defects on the surface of cast film according to the present invention.

[0030] In the diagram: 1. Base; 2. Stainless steel plate; 21. Limiting roller; 211. U-shaped plate; 212. L-shaped seat; 213. Fixing plate; 214. Roller; 3. Support column; 4. Mounting plate; 41. Gantry frame; 42. Drive motor; 43. Drive gear; 44. Second chain; 45. Second gear; 46. Movable column; 5. Rotating rod; 501. Outer rod; 502. Elastic component; 503. Inner rod; 504. Hanging rod; 505. Receiving groove; 506. Deflection block; 507 508. First magnetic block; 509. Moving ring; 5000. Second magnetic block; 51. First gear; 52. Spiral strip; 53. Spiral sponge; 6. First chain; 7. Hydraulic rod; 71. Horizontal plate; 72. CCD camera; 8. Feeding roller; 9. Auxiliary roller; 91. Mounting base; 92. Idler roller; 921. Inner cylinder; 922. Moving plate; 923. Threaded rod; 924. Moving sleeve; 925. Deflection rod; 926. Arc plate; 927. Elastic sleeve; 928. Shaft; 93. Side baffle. Detailed Implementation

[0031] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0032] Reference Figures 1-5As shown, the present invention provides a technical solution: a non-contact dynamic detection device for stains and defects on the surface of cast film, comprising a square movable base 1, a stainless steel plate 2 fixed to the upper middle part of the base 1 by laser welding, a limit roller 21 fixedly installed at both ends of the top of the stainless steel plate 2 parallel to the direction of travel of the cast film by bolts, two sets of support columns 3 (each support column 3 is L-shaped, two in each set, for a total of 4) fixedly installed on the two sides of the top edge of the stainless steel plate 2 between the limit rollers 21 by bolts, the top ends of the support columns 3 are welded and fixed to the outer walls of both sides of the mounting plate 4, hydraulic rods 7 are fixedly connected to the lower middle part of the mounting plate 4, a horizontal plate 71 is fixedly connected to the bottom of the hydraulic rods 7, a CCD camera 72 is evenly spaced at the lower end of the horizontal plate 71, the CCD camera 72 is suspended above the stainless steel plate 2, bearings are embedded at the four corners of the mounting plate 4, and rotating rods 5 are fixedly sleeved in each bearing, the rotating rods 5 passing through the mounting plate 4 through the bearings. A first gear 51 is fixedly connected to the outer wall of the rotating rod 5 above the mounting plate 4. The lower end of the first gear 51 is close to the top surface of the mounting plate 4. A spiral strip 52 is fixedly connected to the bottom of the rotating rod 5 below the mounting plate 4. A spiral sponge 53 is fixedly connected to the bottom of the spiral strip 52. After the film material is introduced between the adjacent limiting rollers 21, the film material is spread flat on the top of the stainless steel plate 2. At this time, the four spiral strips 52 located at the four corners of the stainless steel plate 2 carry the spiral sponge 53 and press them together on both sides of the film material near the edge. Two spiral strips 52 parallel to the width line of the film material can cover the width of the film material. A first chain 6 is fitted on the outer wall of the first gear 51. A second gear 45 is fixedly connected to the outer wall of the rotating rod 5 above one of the first gears 51. A second chain 44 is fitted on the outer wall of the second gear 45. The other end of the second chain 44 is connected to a driving component. Feeding rollers 8 and auxiliary rollers 9 are fixedly installed at the two ends of the top of the base 1 by bolts. The feeding rollers 8 and auxiliary rollers 9 are symmetrically arranged about the center line of the stainless steel plate 2.

[0033] The spiral sponge 53 refers to a spiral-shaped cleaning component made of porous elastic material, specifically polyurethane foam material formed by CNC machining. Its spiral angle matches the rotation direction of the rotating rod 5, enabling a rolling wiping effect when in contact with the surface of the cast film. The CCD camera 72 array refers to multiple equidistantly distributed industrial-grade optical sensors, specifically a 5-megapixel high-speed camera combined with a coaxial light source, forming a detection area covering the full width of the film material. The power distribution mechanism consisting of the first gear 51, the first chain 6, and the second gear 45 can specifically use a double-row roller chain combined with powder metallurgy gears to ensure that the four sets of rotating rods 5 maintain synchronous rotation speed. The hydraulic rod 7 uses a servo electric cylinder combined with a displacement sensor to achieve precise control of the distance between the CCD camera 72 and the cast film surface, enabling precise focusing of the CCD camera 72.

[0034] The driving component includes a gantry frame 41 fixedly connected to the top of the mounting plate 4. A drive motor 42 is fixedly connected to the lower end of the top plate of the gantry frame 41. A drive gear 43 is fixedly connected to the outer wall at the bottom of the drive shaft of the drive motor 42. The second chain 44 is movablely ferruled on the outer wall of the drive gear 43 at the end away from the second gear 45.

[0035] The portal frame 41 refers to a frame structure with a top crossbeam and two side columns, constructed from welded metal profiles. The top crossbeam and columns form a rigid connection to support the weight of the drive motor 42 and suppress vibration transmission. The drive gear 43 is a power transmission component with a toothed structure, specifically a hardened steel gear. Its tooth parameters precisely mesh with the second chain 44 to ensure synchronous power transmission. The second chain 44 is a closed-loop chain connection mechanism, specifically a roller chain. Through the meshing of chain links and gear teeth, it transmits the rotational power of the drive motor 42 to the second gear 45.

[0036] Specifically, the drive motor 42 is bolted to the bottom of the top plate of the portal frame 41, and its output shaft is keyed to the drive gear 43 for coaxial transmission. When the drive motor 42 starts, the drive gear 43 drives the second chain 44 in a closed-loop motion, and the second chain 44 drives the second gear 45 to rotate synchronously through meshing. Since the second gear 45 is fixed to the top of the rotating rod 5, its rotational motion is transmitted to the spiral strips 52 through the rotating rod 5, realizing the synchronous rotation of multiple sets of spiral strips 52. The meshing transmission between the drive gear 43 and the second chain 44 forms a stable power transmission path, ensuring the consistency of the rotational speed of each rotating rod 5 and eliminating lateral displacement of the membrane caused by asynchronous transmission.

[0037] In use, the cast film, after being lifted by the auxiliary roller 9, passes under the two sets of limiting rollers 21 and is laid flat on the top surface of the smooth stainless steel plate 2. The front end of the film is clamped by the feeding roller 8, which rolls and clamps the subsequent film material to continue moving forward. Four rotating rods 5 push four spiral strips 52 carrying spiral sponges 53 to press the film material on both sides near the edge. The hydraulic rod 7 at the bottom of the mounting plate 4 adjusts the height of the CCD camera 72 at the bottom of the horizontal plate 71 and the top surface of the film. After adjusting the focal length of the CCD camera 72 appropriately, its operating height is maintained so that the CCD camera 72 array can capture images across the entire width of the film. The imaging of the CCD camera 72 is used to detect possible stains or defects on the surface of the film material. At this time, the drive motor 42 is started. The drive motor 42, through the cooperation of the drive gear 43, the second chain 44, and the second gear 45, drives the rotating rod 5 at one corner of the mounting plate 4 to rotate. This, in turn, under the drive of the first gear 51 and the first chain 6, simultaneously pushes the four sets of rotating rods 5 at the four corners of the mounting plate 4 to rotate synchronously. The four sets of rotating rods 5 push four spiral strips 52 carrying spiral sponges 53 to press the top surface of the membrane at the four corners of the stainless steel plate 2. Since the rotating rods 5 are all offset from the membrane centerline perpendicular to the axis of the limiting roller 21, the centers of gravity of the four spiral strips 52 are located on both sides of the membrane centerline and close to the edge of the membrane. At this time, when the four spiral strips 52 rotate synchronously, they simultaneously press the membrane with the spiral sponges 53 in a square matrix. During rotation, the spiral sponge 53 slides the film body outwards from the four corners, resulting in a uniform distribution of film tension and creating stable conditions for high-precision optical inspection. This tensions the film body on the top surface of the stainless steel plate 2, allowing the CCD camera 72 to perform accurate optical inspection of the film body spread out on the top surface of the stainless steel plate 2, avoiding the impact of film wrinkles on the inspection effect. At the same time, the spiral sponge 53 can also wipe the top surface of the film body while rotating, realizing simultaneous operation of surface cleaning and defect inspection of the cast film. The rotating wiping action of the spiral sponge 53 completely avoids the rotational scratches caused by the rotation of the tension roller of the transmission inspection equipment. The elastic contact mechanism avoids the generation of vibration scratches, and the non-contact inspection method of the CCD camera 72 array eliminates secondary contamination.

[0038] Reference Figure 2 and Figure 5 As shown in this embodiment, a rotatable movable column 46 is further provided at the middle edge of the top of the mounting plate 4. The middle section of the first chain 6 between adjacent first gears 51 is fitted with a movable ring on the outer wall of the movable column 46, and the movable column 46 bends inward to tension the first chain 6.

[0039] The movable column 46 is a cylindrical support component, which can be rotatably connected using a metal bushing and bearing. Its curvature matches the chain's movement trajectory. This component constrains the middle section of the chain through a ring, generating radial tension to eliminate transmission backlash. The inward bending refers to the movable column 46's axis forming a concave curve relative to the chain's straight path, with a bending angle ranging from, for example, 5° to 15°. This structure ensures the chain is always subjected to centripetal tension during transmission, increasing the wrap angle between the first chain 6 and the first gear 51 to guarantee stable transmission between them and maintain tension stability.

[0040] Reference Figure 2 and Figure 10 As shown, the limiting roller 21 includes a U-shaped plate 211 and an L-shaped seat 212 fixedly connected to the top two sides of the U-shaped plate 211. The bottom of the L-shaped seat 212 is fixedly connected to the top two sides of the stainless steel plate 2. Fixed plates 213 are fixedly connected at even intervals on the bottom plate of the U-shaped plate 211. Rollers 214 are movably arranged between the side walls of the fixed plates 213. The lower end of the rollers 214 extends movably through to the bottom of the U-shaped plate 211.

[0041] Among them, U-shaped plate 211 refers to a metal load-bearing structure with a U-shaped cross-section. The side plates of U-shaped plate 211 have a certain curvature, which can be achieved by stamping steel plates. Its bottom plate provides an installation plane for the roller assembly. L-shaped seat 212 refers to a support component bent at a right angle, which can be connected to U-shaped plate 211 by welding process, and is used to fix the limiting roller 21 as a whole to the top edge of stainless steel plate 2. Fixed plate 213 refers to a rectangular metal sheet vertically welded to the bottom plate of U-shaped plate 211. It can be arranged in an equidistant manner to form multiple installation positions, and is used to constrain the axial position of roller 214. Roller 214 refers to a smooth cylindrical rotating component, which can be realized by a combination structure of bearing and shaft, and converts sliding friction into rolling contact by rotating around the shaft.

[0042] Specifically, the U-shaped plate 211 is rigidly connected to the stainless steel plate 2 via the L-shaped seat 212, ensuring the stability of the overall structure of the limiting roller 21. The fixed plates 213, evenly distributed on the bottom plate of the U-shaped plate 211, form multiple independent support points, ensuring even force distribution at the edge of the membrane. The roller 214 rotates freely around its axis between the fixed plates 213. When the membrane moves laterally, the roller 214 rotates with the membrane, creating rolling friction between the membrane edge and the limiting mechanism. The lower end of the roller 214 extends below the U-shaped plate 211, effectively contacting the edge area of ​​the membrane without interfering with the U-shaped plate 211, thus avoiding surface scratches caused by rigid contact. This structure replaces the linear scraping of the traditional spiral scraper with multi-point rolling support, eliminating rotational tangential force while maintaining membrane tension.

[0043] Reference Figure 1 and Figure 11 As shown, the feeding roller 8 includes a pad plate fixed to the top of the base 1 by bolts or welding. Support plates are fixed to both ends of the top of the pad plate by bolts. A rotating roller is rotatably arranged between the side walls of the support plates. The positioning shaft at one end of the rotating roller is fixedly connected to the output end of the rotating motor on the side wall of the support plate. A through hole is opened on the side wall of the support plate above the rotating roller. A slider is movably engaged between the side walls of the through hole. A moving roller is rotatably arranged between the side walls of the slider. A piston rod is provided on the top of the support plate. The cylinder of the piston rod is fixed to the top of the support plate. The lower end of the moving rod at the output end of the cylinder extends movably through the through hole, and the lower end of the moving rod is fixedly connected to the top of the slider.

[0044] In use, the cast film to be tested is laid flat on the top of the rotating roller. The piston rod is activated to push the slider downwards in the through hole on the side wall of the support plate, so that the moving roller between the sliders moves down to fit the top of the cast film. The moving roller and the rotating roller are used to roll and clamp the film. After the rotating motor is started, the rotating roller rotates under the drive of the rotating motor, thereby continuously rolling and clamping the film to be tested to move forward, thus realizing continuous dynamic detection and conveying of the formed cast film material.

[0045] Reference Figures 2-6 As shown, in this embodiment: the rotating rod 5 includes an outer sleeve rod 501 that is movably connected through the mounting plate 4 and an elastic component 502 that is fixedly connected to the top of the inner cavity of the outer sleeve rod 501. An inner sleeve rod 503 is fixedly connected to the lower end of the elastic component 502. The lower end of the inner sleeve rod 503 extends below the bottom port of the outer sleeve rod 501. The inner sleeve rod 503 has a T-shaped structure, with its upper end being a thick rod that movably engages with the inner wall of the inner cavity of the outer sleeve rod 501, and its lower end being a thin rod with a slightly smaller diameter integrally formed. The outer sleeve rod 5... 01. Protrusions are provided on the inner walls of both sides of the bottom port. Slide grooves are provided on the outer walls of both sides of the inner sleeve rod 503 corresponding to the protrusions. When the thin rod at the lower end of the inner sleeve rod 503 is inserted into the bottom port of the outer sleeve rod 501, the protrusions are movably engaged in the slide grooves to prevent relative rotation between the inner sleeve rod 503 and the outer sleeve rod 501. A hanging rod 504 is fixedly connected to the bottom of the inner sleeve rod 503 outside the outer sleeve rod 501. The lower end of the hanging rod 504 is fixedly connected to the apex of the inner end of the spiral strip 52.

[0046] The inner walls of the outer sleeve rod 501 are respectively provided with receiving grooves 505. A deflecting block 506 is movably connected between the inner walls at the top of the receiving groove 505. A first magnetic block 507 is fitted on the outer wall of the deflecting block 506 on the side away from the elastic component 502. A moving ring 508 is threaded on the outer wall of the outer sleeve rod 501 corresponding to the receiving groove 505. A second magnetic block 509 is fixedly connected on the inner walls of the moving ring 508 corresponding to the deflecting block 506.

[0047] When the moving ring 508 is located at the bottom end of the thread on the outer wall of the outer sleeve rod 501, the second magnetic block 509 and the first magnetic block 507 are on the same horizontal line. At this time, the second magnetic block 509 and the first magnetic block 507 are set with the same magnetic poles opposite each other. When the elastic component 502 is in a normal relaxed state, the top thick rod of the inner sleeve rod 503 is located above the deflection block 506.

[0048] The outer sleeve rod 501 is a rigid support structure penetrating the mounting plate 4, which can be formed from metal tubing and provides axial positioning and rotational support for the rotating rod 5. The elastic component 502 is a buffer element located at the top of the inner cavity of the outer sleeve rod 501, which can be a helical spring or elastic pad, used to absorb the impact load when the spiral strip 52 contacts the membrane. The inner sleeve rod 503 is a movable rod nested inside the outer sleeve rod 501, which can be a metal rod with guide grooves, used to transmit the deformation displacement of the elastic component 502. The hanger rod 504 is a rigid connecting component connecting the inner sleeve rod 503 and the spiral strip 52, which can be a metal connecting rod or a composite plastic rod.

[0049] In use, the movable ring 508 on the outer wall of the outer sleeve 501 is rotated and moved to the bottom end of the thread, so that the second magnetic blocks 509 on both sides of the inner wall of the movable ring 508 and the first magnetic blocks 507 in the receiving grooves 505 on both sides of the inner cavity of the outer sleeve 501 are on the same horizontal line. Through the repulsion of the like magnetic poles between the magnetic blocks, the lower end of the deflection block 506 is deflected and pushed out of the port of the receiving groove 505. At this time, the lifting rod 504 is pulled down, and the lifting rod 504 drives the inner sleeve rod 503 in the outer sleeve 501 to slide down until the bottom of the thick rod is in contact with the bottom plate of the inner cavity of the outer sleeve 501. After the top of the thick rod of the inner sleeve rod 503 slides down and squeezes through the inclined lower end of the deflection block 506, the top of the deflection block 506 is supported by the receiving groove 505, so that the deflection block 506... The inclined lower end of the 06 is suspended on the top of the inner sleeve rod 503. The deflection block 506 blocks the stretched elastic component 502 from pulling the inner sleeve rod 503 upward and resetting it, so that the spiral strip 52 at the lower end of the hanging rod 504 is stably pressed onto the top of the film on the top of the stainless steel plate 2. When a new cast film material needs to be replaced for testing, the rotating moving ring 508 moves upward, the second magnetic block 509 is misaligned with the second magnetic block 509, and the bottom of the deflection block 506 automatically deflects and moves into the receiving groove 505 under the action of gravity. The inner sleeve rod 503 automatically resets and moves upward under the action of the elastic component 502, thereby driving the spiral strip 52 at the lower end of the hanging rod 504 to move upward away from the top of the stainless steel plate 2, so as to facilitate the laying of new cast film material on the top of the stainless steel plate 2 for testing. It is convenient to use.

[0050] Reference Figure 1 and Figures 7-9As shown in this embodiment, the auxiliary roller 9 includes a mounting base 91 fixedly connected to both sides of the top of the base 1 and a support roller 92 movably disposed between the side walls of the top of the mounting base 91. Side baffles 93 are fixedly connected to the outer walls of both ends of the support roller 92. A first pulley is fixedly connected to the outer wall of the support roller 92 end outside the mounting base 91 at one end. The mounting base 91 has an L-shaped structure, and a motor is provided on its base plate. A second pulley is provided on the outer wall of the motor output shaft. A belt is sleeved between the first pulley and the second pulley, thereby driving the support roller 92 to assist the cast film to be tested to move forward.

[0051] The mounting base 91 refers to the fixed base supporting the idler roller 92, which can be fixed to the top of the base 1 by welding or bolting to provide a stable support structure. The idler roller 92 is a rotatable cylindrical assembly, which can be rotated by bearings and shafts, and is used to support and transport the film. The side baffle 93 is an annular protrusion structure set at the end of the idler roller 92, which can be formed by processing metal sheet, and is used to limit the lateral displacement of the film.

[0052] The idler roller 92 includes an inner cylinder 921 and a shaft 928 fixedly connected to the outer wall of the end of the inner cylinder 921. A side baffle 93 is fixedly connected to the outer wall of the shaft 928. The end of the shaft 928 is movably connected through the side wall of the mounting seat 91. A threaded rod 923 is movably arranged between the inner walls of the inner cylinder 921. Movable sleeves 924 are threadedly connected to the outer walls of both ends of the threaded rod 923. Deflecting rods 925 are movably connected at even intervals on the outer walls of the movable sleeves 924. Movable plates 922 are movably connected at even intervals on the outer walls of the inner cylinder 921 corresponding to the deflecting rods 925. The end of the movable plate 922 inside the inner cylinder 921 is movably connected to the other end of the deflecting rod 925. An arc-shaped plate 926 is fixedly connected to the end of the movable plate 922 outside the inner cylinder 921. An elastic sleeve 927 is sleeved on the outer wall of the arc-shaped plate 926. Both ends of the threaded rod 923 extend into the interior of the shaft 928 on both sides of the inner cylinder 921, and one end of the threaded rod 923 extends movably through to the outside of the end of the shaft 928 on one side of the inner cylinder 921.

[0053] The inner cylinder 921 refers to the central tubular structure of the idler roller 92, which can be made of aluminum alloy and is used to house the transmission components. The threaded rod 923 refers to a threaded metal rod, which can have a trapezoidal thread structure, and is used to drive the movement of the movable sleeve 924. The movable sleeve 924 refers to a sleeve with internal threads, which can be made of copper alloy and is used to convert the rotational motion of the threaded rod 923 into linear displacement. The deflection rod 925 refers to a linkage mechanism connecting the movable sleeve 924 and the movable plate 922, which can be hinged and is used to convert linear motion into radial displacement. The movable plate 922 refers to a sliding component penetrating the wall of the inner cylinder 921, which can be made of stainless steel and is used to drive the radial movement of the arc-shaped plate 926. The arc-shaped plate 926 refers to a contact component with an arc-shaped outer surface, which can be injection molded from polyurethane material and is used for flexible contact with the membrane. The elastic sleeve 927 refers to an elastic material layer surrounding the arc-shaped plate 926, which can be made of silicone rubber or polyurethane foam and is used to buffer contact pressure.

[0054] Specifically, when the cast film to be tested is placed on top of the roller 92 between the side baffles 93, the cast film is moved forward as the roller 92 rotates. Before the roller 92 starts rotating, the threaded rod 923 is manually rotated on the outside of the shaft 928 at the end of the roller 92 furthest from the motor. When the threaded rod 923 rotates, it drives the moving sleeve 924 to move horizontally. When the moving sleeve 924 moves, it drives the deflection rod 925 to rotate, thereby pushing the moving plate 922 out of the inner cavity of the inner cylinder 921. After the multiple moving plates 922 are pushed out, the elastic sleeve 927 is evenly expanded by the arc plate 926. After the arc plate 926 expands the elastic sleeve 927, it increases the diameter of the roller 92, thereby adjusting the tension of the film placed on top of the roller 92 to a certain extent. This makes it convenient to tension cast film materials of different thicknesses to be tested, and it is easy to use.

[0055] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A non-contact dynamic detection device for stains and defects on the surface of cast film, characterized in that, The system includes a base (1) and a stainless steel plate (2) fixedly connected to the top of the base (1). Limiting rollers (21) are fixedly connected to both ends of the top of the stainless steel plate (2). Support columns (3) are fixedly connected to both sides of the top of the stainless steel plate (2) between the limiting rollers (21). Mounting plates (4) are fixedly connected to the ends of the support columns (3). Hydraulic rods (7) are fixedly connected to both sides of the lower middle part of the mounting plate (4). A horizontal plate (71) is fixedly connected to the bottom of the hydraulic rods (7). CCD cameras (72) are evenly spaced at the lower end of the horizontal plate (71). The CCD cameras (72) are suspended above the stainless steel plate (2). Rotating rods (5) are movably inserted through the four corners of the mounting plate (4). The outer wall of the rotating rod (5) above the mounting plate (4) is fixedly connected with a first gear (51), the bottom of the rotating rod (5) below the mounting plate (4) is fixedly connected with a spiral strip (52), the bottom of the spiral strip (52) is fixedly connected with a spiral sponge (53), the outer wall of the first gear (51) is fitted with a first chain (6), the outer wall of the rotating rod (5) above one of the first gears (51) is fixedly connected with a second gear (45), the outer wall of the second gear (45) is fitted with a second chain (44), the other end of the second chain (44) is connected with a driving component, and the top of the base (1) on both sides of the stainless steel plate (2) is fixedly connected with a feeding roller (8) and an auxiliary roller (9).

2. The non-contact dynamic detection device for stains and defects on the surface of cast film according to claim 1, characterized in that: The driving component includes a gantry frame (41) fixedly connected to the top of the mounting plate (4). A drive motor (42) is fixedly connected to the lower end of the top plate of the gantry frame (41). A drive gear (43) is fixedly connected to the outer wall at the bottom of the drive shaft of the drive motor (42). The second chain (44) is movable on the outer wall of the drive gear (43) at the end away from the second gear (45).

3. The non-contact dynamic detection device for stains and defects on the surface of cast film according to claim 1, characterized in that: The mounting plate (4) has movable columns (46) rotatably connected to the middle edge of the top four sides. The middle section of the first chain (6) between adjacent first gears (51) is fitted with a movable ring on the outer wall of the movable column (46). The movable column (46) bends inward to tension the first chain (6).

4. The non-contact dynamic detection device for stains and defects on the surface of cast film according to claim 1, characterized in that: The rotating rod (5) includes an outer rod (501) that is movably connected through the mounting plate (4) and an elastic component (502) fixedly connected to the top of the inner cavity of the outer rod (501). The lower end of the elastic component (502) is fixedly connected to an inner rod (503). The lower end of the inner rod (503) extends to below the bottom port of the outer rod (501). The bottom of the inner rod (503) outside the outer rod (501) is fixedly connected to a hanging rod (504). The lower end of the hanging rod (504) is fixedly connected to a spiral strip (52).

5. The non-contact dynamic detection device for stains and defects on the surface of cast film according to claim 4, characterized in that: The inner walls of the outer sleeve rod (501) are respectively provided with receiving grooves (505). A deflection block (506) is movably connected between the inner walls at the top of the receiving groove (505). A first magnetic block (507) is fitted on the outer wall of the deflection block (506) on the side away from the elastic component (502). A moving ring (508) is threaded on the outer wall of the outer sleeve rod (501) corresponding to the receiving groove (505). A second magnetic block (509) is fixedly connected on the inner walls of the moving ring (508) on both sides corresponding to the deflection block (506).

6. The non-contact dynamic detection device for stains and defects on the surface of cast film according to claim 5, characterized in that: When the moving ring (508) is located at the bottom end of the thread on the outer wall of the outer sleeve rod (501), the second magnetic block (509) and the first magnetic block (507) are on the same horizontal line. At this time, the second magnetic block (509) and the first magnetic block (507) have the same magnetic poles facing each other.

7. The non-contact dynamic detection device for stains and defects on the surface of cast film according to claim 1, characterized in that: The auxiliary roller (9) includes a mounting seat (91) fixedly connected to both sides of the top of the base (1) and a support roller (92) movably disposed between the side walls at the top of the mounting seat (91). Side baffles (93) are fixedly connected to the outer walls at both ends of the support roller (92).

8. The non-contact dynamic detection device for stains and defects on the surface of cast film according to claim 7, characterized in that: The idler roller (92) includes an inner cylinder (921) and a shaft (928) fixedly connected to the outer wall of the end of the inner cylinder (921). The end of the shaft (928) is movably connected through the side wall of the mounting base (91). A threaded rod (923) is movably arranged between the inner walls of the inner cylinder (921). Movable sleeves (924) are threadedly connected to the outer walls of both ends of the threaded rod (923). Deflection rods (925) are movably connected at even intervals on the outer walls of the movable sleeves (924). Movable plates (922) are movably connected at even intervals on the outer walls of the inner cylinder (921) corresponding to the deflection rods (925). The end of the movable plate (922) inside the inner cylinder (921) is movably connected to the other end of the deflection rod (925). An arc-shaped plate (926) is fixedly connected to the end of the movable plate (922) outside the inner cylinder (921). An elastic sleeve (927) is sleeved on the outer wall of the arc-shaped plate (926).

9. The non-contact dynamic detection device for stains and defects on the surface of cast film according to claim 1, characterized in that: The two ends of the threaded rod (923) extend into the shaft (928) on both sides of the inner cylinder (921), and one end of the threaded rod (923) extends through to the outside of the end of the shaft (928) on one side of the inner cylinder (921).

10. The non-contact dynamic detection device for stains and defects on the surface of cast film according to claim 1, characterized in that: The limiting roller (21) includes a U-shaped plate (211) and an L-shaped seat (212) fixedly connected to the top two sides of the U-shaped plate (211). The bottom of the L-shaped seat (212) is fixedly connected to the top two sides of the stainless steel plate (2). Fixed plates (213) are fixedly connected at even intervals on the bottom plate of the U-shaped plate (211). Rollers (214) are movably arranged between the side walls of the fixed plates (213). The lower end of the rollers (214) extends movably through to the bottom of the U-shaped plate (211).

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