Collection Equipment, Collection Method, and Detection Method for Magnetic Metal Particles on the Surface of a Flexible Film Material

Abstract

It is a collection facility, collection method, and detection method for magnetic metal particles on the surface of a flexible film material. In the collection facility (100) for magnetic metal particles on the surface of a flexible film material, in cooperation with an unwinding roller (102), a transport device, a magnetic member (104), and a winding roller (103), the flexible film material (200) is transported by the transport device, and winding and unwinding are performed on the flexible film material (200) by the unwinding roller (102) and the winding roller (103) respectively. In the process of transporting the flexible film material (200), the magnetic member (104) adsorbs metal particles on the surface of the flexible film material (200) to collect magnetic metal particles on the surface of the flexible film material (200). At the same time, by collecting metal particles on the surface of the flexible film material (200) by the above collection facility (100), magnetic metal particles on the surface of the flexible film material (200) are effectively removed, thereby improving the surface state of the flexible film material (200) and improving the use performance of the flexible film material (200).

Description

Technical Field

[0001] The present invention relates to the technical field of detecting the surface of a flexible film material, and particularly to a collecting facility for magnetic metal particles on the surface of a flexible film material, a method for collecting magnetic metal particles on the surface of a flexible film material, and a method for detecting magnetic metal particles on the surface of a flexible film material.

Background Art

[0002] As flexible film materials are becoming increasingly popular, the requirements for the performance of flexible film materials in production are also getting higher and higher. The performance of flexible film materials is mainly manifested in two aspects: the performance of the film material itself and the surface state. The performance of the film material itself directly affects the use of the film material, and the surface state of the film material also has an important impact on the use of the film material. For example, in the manufacturing process of lithium batteries, flexible film materials such as copper foil, aluminum foil, separators, and current collectors are used. In the process of production and use, these flexible film materials usually need to be transported by adopting transmission rollers, or need to be transferred and processed by multiple machines. In this case, some transmission parts such as bearings and gears are used at the connection parts of the transmission rollers. These transmission parts are often made of magnetic metals such as iron. During the operation of the transmission parts, friction and wear may occur. In this case, some magnetic metal particles are generated. When these magnetic metal particles fall onto the surface of the flexible film material, they will affect the surface performance of the film material. And when the film material with magnetic metal particles attached to its surface is applied to the assembly of the battery, it will also cause great harm to the battery. For example, magnetic metal particles can penetrate through the separator and cause a short circuit, and their adhesion can also lead to uneven distribution of the active material, which can also affect the cycle performance of the battery. Therefore, removing magnetic metal particles on the surface of flexible film materials has important significance for improving the use performance of flexible film materials.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Based on this, it is necessary to provide a facility capable of effectively collecting magnetic metal particles on the surface of a flexible film material, a collection method, and a method for detecting magnetic metal particles.

Means for Solving the Problems

[0004] In order to solve the above technical problems, the technical solution of an embodiment of the present invention is as follows. It includes a frame, an unwinding roller, a transport device, a magnetic member, and a winding roller. The transport device is connected to the frame and is provided with a transport passage having a material inlet end and a material outlet end. The unwinding roller and the winding roller are respectively connected to the frame, and the unwinding roller is located at the material inlet end of the transport passage and is used to unwind a flexible film material. The winding roller is located at the material outlet end of the transport passage and is used to wind up the flexible film material. The magnetic member is connected to the frame and is located on at least one side of the transport passage and is a facility for collecting magnetic metal particles on the surface of the flexible film material used to adsorb the magnetic metal particles on the surface of the flexible film material.

[0005] In one of the embodiments, there are a plurality of the magnetic members, and the plurality of magnetic members are respectively provided on both sides of the transport passage.

[0006] In one of the embodiments, the magnetic member is formed by sequentially joining a plurality of magnetic blocks.

[0007] In one of the embodiments, the magnetic member is reversibly connected to the frame.

[0008] In one of the embodiments, the frame is provided with a guide member used to movably connect the magnetic member and adjust the distance between the magnetic member and the surface of the flexible film material by adjusting the distance between the magnetic member and the transport passage.

[0009] In one of the embodiments, the transport device includes a material guide roller that is connected to the frame and used to guide a flexible film material to pass through the transport passage.

[0010] In one of the embodiments, the collecting facility for magnetic metal particles on the surface of the flexible film material is movably connected to the frame, the distance between it and the winding roller is adjustable, and it further includes a pressure roller that can move until it contacts the flexible film material on the winding roller.

[0011] In one of the embodiments, the collecting facility for magnetic metal particles on the surface of the flexible film material further includes a tension roller that is connected to the frame and used to adjust the tension of the flexible film material.

[0012] The present invention provides another embodiment of a technical solution, that is, the collecting facility for magnetic metal particles on the surface of the flexible film material described in any of the above embodiments, an adhesive tape used to adhere magnetic metal particles in a magnetic member, and a metal particle transfer module including a drive unit that drives the adhesive tape to move closer to or away from the magnetic member, and a polarization detection module used to detect magnetic metal particles on the adhesive tape, to provide a system for collecting and detecting magnetic metal particles on the surface of a flexible film material.

[0013] The method for collecting magnetic metal particles on the surface of a flexible film material employs the collecting facility for magnetic metal particles on the surface of the flexible film material described in any of the above embodiments, including the steps of attaching a roll-shaped flexible film material to an unwinding roller and unwinding it, transporting the flexible film material to the winding roller by the transport device and winding it up, and adsorbing magnetic metal particles on the surface of the flexible film material by the magnetic member. Characterized in that

[0014] In one embodiment, the transport speed of the flexible film material is controlled to be 10 m / min or more and 100 m / min or less, preferably controlled to 15 m / min to 80 m / min, and more preferably controlled to 20 m / min to 50 m / min.

[0015] In one embodiment, the distance between the magnetic member and the surface of the flexible film material is controlled to be more than 0 mm and 20 mm or less, preferably controlled to 1 mm to 15 mm, and more preferably controlled to 2 mm to 5 mm.

[0016] In one embodiment, the tension of the flexible film material is controlled to be 3 N or more and 100 N or less, preferably controlled to 5 N to 80 N, and more preferably controlled to 10 N to 60 N.

[0017] The method for detecting magnetic metal particles on the surface of the flexible film material is collecting magnetic metal particles on the surface of the flexible film material by adopting the above collection method; transferring the magnetic metal particles adsorbed on the magnetic member to an adhesive tape; and detecting the magnetic metal particles on the adhesive tape.

[0018] In one embodiment, the magnetic metal particles on the adhesive tape are detected by polarization.

Advantages of the Invention

[0019] In the above-described equipment for collecting magnetic metal particles on the surface of a flexible film material, mainly through the cooperation of an unwinding roller, a transport device, a magnetic member, and a winding roller, the flexible film material is transported by the transport device, and the flexible film material is wound and unwound by the unwinding roller and the winding roller respectively. During the transportation process of the flexible film material, the magnetic member adsorbs the magnetic metal particles on the surface of the flexible film material to collect the magnetic metal particles on the surface of the flexible film material. At the same time, by collecting the magnetic metal particles on the surface of the flexible film material with the above-described collecting equipment, the magnetic metal particles on the surface of the flexible film material are effectively removed, thereby improving the surface state of the flexible film material and improving the use performance of the flexible film material.

[0020] The above-described method for collecting magnetic metal particles on the surface of a flexible film material adopts the equipment for collecting magnetic metal particles on the surface of the flexible film material. When collecting the magnetic metal particles on the surface of the flexible film material, the operation method is simple and easy to perform, and there is no need to rely on complex equipment and operations. It can reduce the cost of collecting and removing magnetic metal particles on the surface of the flexible film material and improve the efficiency of collecting and removing magnetic metal particles on the surface of the flexible film material.

[0021] The above-described method for detecting magnetic metal particles on the surface of a flexible film material mainly collects the magnetic metal particles on the surface of the flexible film material on the surface of the magnetic member by the above-described method for collecting magnetic metal particles on the surface of the flexible film material, then transfers the magnetic metal particles on the surface of the magnetic member to an adhesive tape, and detects the magnetic metal particles on the adhesive tape. In the above-described method for detecting magnetic metal particles on the surface of a flexible film material, the magnetic metal particles transferred to the adhesive tape can represent the surface state of the entire flexible film material as the magnetic metal particles on the entire surface of the flexible film material, and can further improve the authenticity and reliability of the detection.

[0022] Furthermore, when detecting magnetic metal particles on the surface of a flexible film material, by detecting the particles on the adhesive tape with polarized light, the size and number of the magnetic metal particles can be accurately judged, and the surface state of the flexible film material can be more realistically reflected.

Brief Description of the Drawings

[0023]

Figure 1

Explanation of Reference Numerals

[0024] 100... Collecting facility for magnetic metal particles on the surface of a flexible film material, 101... Frame, 102... Unwinding roller, 103... Material guide roller, 104... Magnetic member, 105... Winding roller, 106... Pressure roller, 107... Tension roller, 108... Backup roller, 109... Guide member, 200... Flexible film material.

Modes for Carrying Out the Invention

[0025] In order to make the above objects, features, and advantages of the present invention clearer and easier to understand, the following will describe in detail the specific embodiments of the present invention with reference to the drawings. In the following description, many specific details are described so as to fully understand the present invention. However, the present invention can be implemented in many other forms different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0026] In the description of the present invention, the terms "center", "vertical direction", "horizontal direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc., which indicate the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are merely for facilitating the description of the present invention and simplifying the description, and do not indicate or imply that the mentioned devices or elements must have a specific orientation and be configured and operated in a specific orientation. Therefore, it should not be understood as limiting the present invention.

[0027] In the present invention, unless otherwise clearly defined and limited, terms such as "attach", "connect", "connect", "fix", etc. should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or integrated. It may be a mechanical connection, an electrical connection, directly connected, or indirectly connected through an intermediate medium. It may also be the relationship of internal communication between two elements or the interaction between two elements. Unless otherwise clearly limited, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.

[0028] Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as commonly understood by those skilled in the art. The terms used in the specification of the present invention in this document are only for explaining specific embodiments and are not for limiting the present invention. The term "and / or" used in this document includes any and all combinations of one or more of the related listed items.

[0029] Referring to FIG. 1, an embodiment of the present invention provides a collection facility 100 for magnetic metal particles on the surface of a flexible film material. The collection facility 100 for magnetic metal particles on the surface of the flexible film material includes a frame 101, an unwinding roller 102, a transport device, a magnetic member 104, and a winding roller 105. The transport device is connected to the frame 101 and is provided with a transport passage having a material inlet end and a material outlet end. The unwinding roller 102 and the winding roller 105 are respectively connected to the frame 101. The unwinding roller 102 is located at the material inlet end of the transport passage and is used to unwind the flexible film material 200. The winding roller 105 is located at the material outlet end of the transport passage and is used to wind up the flexible film material 200. The magnetic member 104 is connected to the frame 101 and is located on at least one side of the transport passage and is used to adsorb magnetic metal particles on the surface of the flexible film material 200. In the collection facility 100 for magnetic metal particles on the surface of the flexible film material of this embodiment, mainly through the cooperation of the unwinding roller 102, the transport device, the magnetic member 104, and the winding roller 105, the transport device transports the flexible film material 200, and the unwinding roller 102 and the winding roller 105 respectively wind up and unwind the flexible film material 200. During the transport process of the flexible film material 200, the magnetic member 104 adsorbs the magnetic metal particles on the surface of the flexible film material 200 to collect the magnetic metal particles on the surface of the flexible film material 200. At the same time, by collecting the magnetic metal particles on the surface of the flexible film material 200 by the above collection facility, the magnetic metal particles on the surface of the flexible film material 200 are effectively removed, thereby improving the surface state of the flexible film material 200 and improving the use performance of the flexible film material 200.

[0030] When transporting in the transport passage of the flexible film material 200, since the magnetic member 104 is provided on at least one side of the transport passage, it can be understood that the particles on at least one surface of the flexible film material 200 can be adsorbed. In order to enhance the adsorption effect of the particles on the surface of the flexible film by the magnetic member 104, the magnetic member 104 is provided on both sides of the transport passage.

[0031] Specifically, there are a plurality of magnetic members 104, and the plurality of magnetic members 104 are respectively provided on both sides of the transport passage. Preferably, the number of magnetic members 104 is from 2 to 10. For example, the number of magnetic members 104 may be 2, 3, 5, 6, 8, etc., but is not limited thereto. In the embodiment shown in FIG. 1, the number of magnetic members 104 is 2, and the two magnetic members 104 are respectively provided on both sides of the transport passage. Preferably, the number of magnetic members 104 is an even number, and more preferably, the magnetic members 104 on both sides of the transport passage are provided offset. Even more preferably, the magnetic members 104 on both sides of the transport passage are provided facing each other one-to-one.

[0032] In one specific example, the magnetic member 104 is reversibly connected to the frame 101. By reversing the magnetic member 104, the magnetic metal particles adsorbed on the magnetic member 104 can be easily transferred to the adhesive tape. Preferably, the magnetic member 104 and the frame 101 are connected by a hinge (not shown), and the connection method by the hinge can easily realize that the magnetic member 104 is reversibly connected to the frame 101. Specifically, the fastener is a stainless steel hinge.

[0033] In one specific example, the magnetic member 104 is a permanent magnet or an electromagnet. Preferably, the magnetic member 104 is a magnetic member 104 with a magnetic field strength of 8000 GS to 20000 GS. Preferably, the magnetic field strength of the magnetic member 104 may be 8000 GS, 1000 GS, 12000 GS, 15000 GS, 18000 GS, etc., but is not limited thereto. Even more preferably, the magnetic field strength of the permanent magnet is 8000 GS to 12000 GS. The magnetic field strength of the electromagnet is 8000 GS to 20000 GS.

[0034] In one specific example, the magnetic member 104 is formed by sequentially joining a plurality of magnetic blocks. Specifically, the magnetic member 104 is formed by sequentially joining a plurality of magnetic blocks along its length direction. By joining a plurality of magnetic blocks to the magnetic member 104, a more uniform magnetic field can be obtained and adsorption dead angles can be reduced. Preferably, the number of magnetic blocks is 2 to 10. For example, the number of magnetic blocks may be 2, 3, 5, 6, 8, etc., but is not limited thereto. More preferably, the length of the magnetic block is 0.1 m to 0.5 m. For example, the length of the magnetic block may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm, etc., but is not limited thereto. More preferably, the plurality of magnetic blocks in the magnetic member 104 are the same.

[0035] In one specific example, a magnetic member 104 is movably connected to the frame 101, and a guide member 109 is provided for adjusting the distance between the magnetic member 104 and the surface of the flexible film material 200 by adjusting the distance between the magnetic member 104 and the transport passage. By installing the guide member 109, it becomes easy to adjust the distance between the magnetic member 104 and the surface of the flexible film material 200 by adjusting the position of the magnetic member 104, and the adsorption effect of the magnetic metal particles on the surface of the flexible film material 200 by the magnetic member 104 is improved. Preferably, the guide member 109 is a slide rail. In this case, the magnetic member 104 is slidably connected to the guide member 109. To facilitate the attachment of the magnetic member 104, a slider slidable on the slide rail is provided on the slide rail, and by fixing the magnetic member 104 to the slider, it can be understood that the magnetic member 104 can be moved along the slide rail by the sliding of the slider.

[0036] In one specific example, the magnetic member 104 is attached to the slider by a hinge, the distance between the magnetic member 104 and the surface of the flexible film material 200 is adjustable, and since the magnetic member 104 is reversible by the hinge, the magnetic metal particles adsorbed on the magnetic member 104 can be easily transferred to the adhesive tape. When it is necessary to transfer the magnetic metal particles in the magnetic member 104, the guide member 109 moves the magnetic member 104 away from the surface of the flexible film material 200 so that the equipment has sufficient space for the adhesive tape sticking operation. In order for the adhesive tape to adhere to the magnetic metal particles, during the process of the magnetic member 104 sliding or after the magnetic member 104 stops sliding, the magnetic member 104 is reversed so that the adsorption surface changes from facing the surface of the flexible film material to facing away from the frame 100.

[0037] Furthermore, a rotary drive element used to drive the reversal of the magnetic member is attached to the slider. Specifically, the hinge includes a first part fixed to the slider and a second part fixed to the magnetic member 104, and the first part and the second part are relatively rotatable. The rotary drive element is a motor, the motor body is fixedly attached to the slider, the output shaft is connected to the second part, and by driving the rotation of the second part when the rotary drive element is activated, the magnetic member 104 is reversed.

[0038] The conveying device is provided with a material guiding roller 103. It can be understood that the material guiding roller 103 is connected to the frame 101 and used to guide the flexible film material 200 to pass through the conveying passage. Also, it can be understood that the material guiding roller 103 cooperates with the unwinding roller 102 and the winding roller 105 to form the conveying passage. Furthermore, the number of the material guiding rollers 103 is from 1 to 20. For example, the number of the material guiding rollers 103 may be 2, 3, 5, 6, 8, 10, 12, 15, 18, etc., but is not limited thereto. Moreover, there are a plurality of the material guiding rollers 103. By installing a plurality of the material guiding rollers 103 and flexibly designing the shape of the conveying passage, the conveying direction of the flexible film material 200 can be adjusted, and the stability of the conveying of the flexible film material 200 can also be enhanced. In the embodiment shown in FIG. 1, the number of the material guiding rollers 103 is 9, and by installing 9 material guiding rollers 103, the flexible film material 200 is stably conveyed.

[0039] In one specific example, the collecting equipment 100 for magnetic metal particles on the surface of the flexible film material further includes a pressure roller 106. The pressure roller 106 is movably connected to the frame 101, the distance between it and the winding roller 105 is adjustable, and it can move until it abuts against the flexible film material 200 on the winding roller 105. By providing the pressure roller 106 on the frame 101, when winding the flexible film material 200, the pressing action of the pressure roller 106 can discharge the air between each layer of the flexible film material 200 on the winding roller 105, making the winding more stable and firm.

[0040] In one specific example, the collecting equipment 100 for magnetic metal particles on the surface of the flexible film material further includes a tension roller 107 which is connected to the frame 101 and used to adjust the tension of the flexible film material 200. By installing the tension roller 107, the tension of the flexible film material 200 can be adjusted, making the conveying and winding of the flexible film material 200 smoother.

[0041] In another specific example, the collecting equipment 100 for magnetic metal particles on the surface of the flexible film material further includes a spare roller 108 connected to the frame 101 and used to replace the material guide roller 103. When the material guide roller 103 is damaged or requires periodic replacement, the spare roller 108 is used to replace the material guide roller 103 so that the collecting equipment 100 for magnetic metal particles on the surface of the flexible film material operates stably.

[0042] In order to reduce the influence on the collection and detection of particles generated by the rotation of the unwinding roller 102, the material guide roller 103, the pressure roller 106, the tension roller 107, the winding roller 105, etc., it can be understood that the use of the rollers can be reduced while the transfer of the flexible film material 200 is normally maintained. Also, in order to reduce the risk of generation of magnetic metal particles during the operation process of the collecting equipment, ceramic bearings are selectively used for the bearings in the equipment. At the same time, by adding and attaching a protective cover to the worn and rotating parts, the influence on the collection and detection of particles generated during the operation of the equipment is further reduced.

[0043] In one specific example, the collecting equipment 100 for magnetic metal particles on the surface of the flexible film material is the collecting equipment for magnetic particles on the surface of the flexible film material 200. Among them, the magnetic particles are particles that can be adsorbed by the magnetic member 104.

[0044] Another embodiment of the present invention provides a collecting and detecting system for magnetic metal particles on the surface of a flexible film material, which includes the above-mentioned collecting equipment 100 for magnetic metal particles on the surface of the flexible film material, a metal particle transfer module, and a polarization detection module. The metal particle transfer module includes an adhesive tape used to adhere magnetic metal particles in the magnetic member 104, and a drive unit that drives the adhesive tape to move closer to or away from the magnetic member 104. When the adhesive tape approaches the magnetic member 104, it adheres the magnetic metal particles in the magnetic member 104, and the drive unit can move the adhesive tape away from the magnetic member 104. The drive unit is an air cylinder or an electric cylinder.

[0045] The polarization detection module is used to detect the magnetic metal particles on the adhesive tape. The polarization detection module can emit polarization, and by detecting the particles on the adhesive tape with the polarization, it can accurately determine the size and number of the magnetic metal particles, and can more realistically reflect the surface state of the flexible film material 200.

[0046] Another embodiment of the present invention provides a method for collecting magnetic metal particles on the surface of the flexible film material 200. The collection method employs the above-mentioned collection facility 100 for magnetic metal particles on the surface of the flexible film material, includes the steps of attaching the roll-shaped flexible film material 200 to the unwinding roller 102 and unwinding it, transporting the flexible film material 200 to the winding roller 105 by a transport device and winding it up, and adsorbing the magnetic metal particles on the surface of the flexible film material 200 by a magnetic member. When collecting the magnetic metal particles on the surface of the flexible film material 200, the operation method of the collection method is simple and easy to perform, does not need to depend on complex equipment and operations, can reduce the cost of collecting and removing the magnetic metal particles on the surface of the flexible film material 200, and can improve the efficiency of collecting and removing the magnetic metal particles on the surface of the flexible film material 200.

[0047] Preferably, in the method for collecting magnetic metal particles on the surface of the flexible film material 200, the transport speed of the flexible film material 200 is controlled to be 10 m / min or more and 100 m / min or less. The lower the transport speed of the flexible film material 200, the longer the action time between the magnetic member 104 and the particles on the surface of the flexible film material 200, and the better the adsorption effect. In the actual production process, the transport speed can be designed according to the production plan, schedule, etc. For example, the transport speed of the flexible film material 200 is controlled to be 10 m / min, 30 m / min, 50 m / min, 60 m / min, 80 m / min, or 90 m / min, etc.

[0048] Preferably, in the method for collecting magnetic metal particles on the surface of the flexible film material 200, the distance between the magnetic member 104 and the surface of the flexible film material 200 is controlled to be more than 0 mm and 20 mm or less. The magnetic field strength of the magnetic member 104 gradually weakens from near to far. The smaller the distance between the magnetic member 104 and the surface of the flexible film material 200, the greater the action intensity between the magnetic member 104 and the particles on the surface of the flexible film material 200, and the better the adsorption effect. In the actual production process, the distance between the magnetic member 104 and the surface of the flexible film material 200 is mainly determined by the flatness of the flexible film material 200. It is necessary to reduce the distance and ensure that the magnetic member 104 does not touch the surface of the flexible film material 200 so as to prevent damage to the surface of the flexible film material 200. For example, the distance between the magnetic member 104 and the surface of the flexible film material 200 is controlled to be 1 mm, 5 mm, 8 mm, 10 mm, 15 mm, or 18 mm, etc. Preferably, the distance between the magnetic member 104 and the surface of the flexible film material 200 is controlled to be 2 mm to 5 mm.

[0049] Preferably, in the method for collecting magnetic metal particles on the surface of the flexible film material 200, the tension of the flexible film material 200 is controlled to be 3 N or more and 100 N or less. For example, the tension of the flexible film material 200 is controlled to be 5 N, 10 N, 20 N, 50 N, or 80 N.

[0050] Before attaching the roll-shaped flexible film material 200 to the unwinding roller 102, it can be understood that the collection facility 100 for magnetic metal particles on the surface of the flexible film material is further washed, specifically, the step of washing the rollers of the collection facility, the magnetic member 104, etc. is further included. More specifically, the rollers of the collection facility, the magnetic member 104, etc. are washed using alcohol, lint-free cloth, adhesive tape, etc.

[0051] Another embodiment of the present invention provides a method for detecting magnetic metal particles on the surface of the flexible film material 200. The method for detecting magnetic metal particles on the surface of the flexible film material 200 includes the steps of collecting magnetic metal particles on the surface of the flexible film material 200 by adopting the above collection method, transferring the magnetic metal particles adsorbed on the magnetic member 104 to the adhesive tape, and detecting the magnetic metal particles on the adhesive tape. In this detection method, mainly, after collecting the particles on the surface of the flexible film material 200 on the surface of the magnetic member 104 by the above method for collecting magnetic metal particles on the surface of the flexible film material 200, the magnetic metal particles on the surface of the magnetic member 104 are transferred to the adhesive tape, and then the magnetic metal particles on the adhesive tape are detected. In the above method for detecting magnetic metal particles on the surface of the flexible film material 200, the magnetic metal particles transferred to the adhesive tape can represent the surface state of the entire flexible film material 200 as the magnetic metal particles on the entire surface of the flexible film material 200, and can further improve the authenticity and reliability of the detection. At the same time, the above method for detecting magnetic metal particles on the surface of the flexible film material 200 has a wide application range, and accurate test results can be obtained for both transparent and opaque flexible film materials 200.

[0052] Regarding the method for detecting magnetic metal particles on the surface of the flexible film material 200, the conventional methods are mainly carried out by adopting the scanning electron microscope method and the CCD surface defect detection method. Specifically, in the scanning electron microscope method, the detection target is cut from the original fabric to prepare an electron microscope sample with a size of 3 mm × 5 mm, placed on the test stage, and the sample is scanned by the focused narrow high-energy electron beam of the electron microscope. Due to the interaction between the light beam and the substance, various physical information is excited, and these information are collected, amplified, and re-imaged to achieve representing the microscopic topography of the substance. Moreover, an EDS element analysis function is arranged in the electron microscope system, and by analyzing the element components of the substance on the microscopic surface, it is analyzed whether magnetic metal particles are contained on the surface. The scanning electron microscope method needs to rely on expensive electron microscope equipment, and moreover, the sampling area is small, there is a large contingency, and it is difficult to reflect the actual surface state of the entire flexible film material. In the CCD surface defect detection method, for a thin film material with high light transmittance, the system adopts a detection method of shining light so as to transmit, that is, the light source is below the thin film and the camera takes an image above the thin film. During the operation of the production line, the system starts detection by collecting the operation state information of the production line in real time by the encoder, and the SIMV image analysis software performs defect processing on the image taken by the camera. Since there are obvious differences in gradation between the images of defects and normal products, the system can find the defects and determine information such as the size, position, and type of the defects through further calculation and analysis. The CCD surface defect detection method has a small scope of use, and the main inspection target is a light-transmitting material, so the scope of use is narrow. Opaque materials such as copper foil and aluminum foil cannot be used.

[0053] In one specific example, magnetic metal particles in the adhesive tape are detected by polarization. When detecting magnetic metal particles on the surface of the flexible film material 200, by detecting the particles in the adhesive tape by polarization, the size and number of the magnetic metal particles can be accurately determined, and the surface state of the flexible film material 200 can be more realistically reflected. Specifically, due to the physical properties of the metal surface, light rays do not enter the metal substance, and it reflects and emits the incident light like a mirror. After the incident light is reflected through the metal surface, the reflected light has the same vibration direction as the incident light. After the incident light passes through the non-metal substance, its vibration direction changes (mainly due to the incident of light into the non-metal substance), and the reflected light that exits after passing through the non-metal substance loses its polarization and its direction also changes. According to this principle, polarized light can pass through a polarizer with the same direction and enter the camera. When the two polarizers are in the cross position (one of them is rotated by 90 degrees), the reflected light after polarization cannot pass through the second polarizer. The magnetic metal particles are black in the cross state, thereby determining whether they are magnetic metal particles, as well as their size and number, and more realistically reflecting the surface state of the flexible film material 200. Preferably, when detecting particles in the adhesive tape by polarization, a JOMES polarization test instrument is adopted to detect the particles in the adhesive tape.

[0054] Preferably, as an example of the selection of the adhesive tape, the adhesive tape includes a Mylar adhesive tape, a cellophane adhesive tape, a double-sided tape or a PP tape. In one specific example, the adhesive tape is a Mylar adhesive tape. During detection, the Mylar adhesive tape is cut into a square with a length and width of 5 mm × 5 mm, and moved 4 cm each time to transfer the particles, and adhered repeatedly 3 times at each position.

[0055] In one specific example, when transferring the particles adsorbed on the magnetic member 104 to the adhesive tape, an adhesive tape is adopted to adhere and transfer the magnetic metal particles adsorbed on the magnetic member 104. Among them, regarding the requirement of transferring the particles, it meets two requirements: the number taken by adhesion for the second time is 30% or less of the sum of the previous two times, and the number taken by adhesion for the last time is 10% or less of the sum of all the previous times. Each technical feature of the embodiments described above can be arbitrarily combined. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as these combinations of technical features do not conflict, they should be regarded as within the scope described in this specification.

[0056] The embodiments described above merely illustrate some embodiments of the present invention. Although the description is specific and detailed, it should not be understood as limiting the patent scope of the present invention. Those skilled in the art should note that, on the premise of not departing from the concept of the present invention, several further modifications and improvements can be made, and all of these belong to the protection scope of the present invention. Therefore, the patent protection scope of the present invention should be in accordance with the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. A flexible film material collecting facility for collecting magnetic metal particles on the surface of a flexible film material, comprising a frame, an unwinding roller, a transport device, a magnetic member, and a winding roller, wherein the transport device is connected to the frame and is provided with a transport passage having a material inlet end and a material outlet end; the unwinding roller and the winding roller are each connected to the frame, and the unwinding roller is located at the material inlet end of the transport passage and is used for unwinding the flexible film material, and the winding roller is located at the material outlet end of the transport passage and is used for winding up the flexible film material; and the magnetic member is connected to the frame and is located on at least one side of the transport passage and is used for adsorbing magnetic metal particles on the surface of the flexible film material.

2. There are a plurality of the magnetic members, and the plurality of magnetic members are respectively provided on both sides of the transport passage. The flexible film material collecting facility for collecting magnetic metal particles on the surface of a flexible film material according to claim 1, characterized in that.

3. The magnetic member is formed by sequentially joining a plurality of magnetic blocks. The flexible film material collecting facility for collecting magnetic metal particles on the surface of a flexible film material according to claim 1 or 2, characterized in that.

4. The magnetic member is reversibly connected to the frame. The flexible film material collecting facility for collecting magnetic metal particles on the surface of a flexible film material according to any one of claims 1 to 3, characterized in that.

5. A guide member is provided on the frame, and the magnetic member is movably connected to the guide member to adjust the distance between the magnetic member and the surface of the flexible film material by adjusting the distance between the magnetic member and the transport passage. The flexible film material collecting facility for collecting magnetic metal particles on the surface of a flexible film material according to any one of claims 1 to 4, characterized in that.

6. The transport device further comprises a material guide roller connected to the frame and used for guiding the flexible film material to pass through the transport passage. The flexible film material collecting facility for collecting magnetic metal particles on the surface of a flexible film material according to any one of claims 1 to 5, characterized in that.

7. The flexible film material collecting facility further comprises a pressure roller movably connected to the frame, the distance between the pressure roller and the winding roller being adjustable, and the pressure roller being movable until it abuts against the flexible film material on the winding roller; and / or further comprises a tension roller connected to the frame and used for adjusting the tension of the flexible film material. ​ The collecting equipment for magnetic metal particles on the surface of the flexible film material according to any one of claims 1 to 6, characterized in that...

8. The collecting equipment for magnetic metal particles on the surface of the flexible film material according to any one of claims 1 to 7, a metal particle transfer module comprising an adhesive tape used to adhere magnetic metal particles in the magnetic member, and a drive unit for driving the adhesive tape to move closer to or away from the magnetic member; a polarization detection module used to detect magnetic metal particles on the adhesive tape, A collecting and detecting system for magnetic metal particles on the surface of a flexible film material, characterized in that...

9. Adopting the collecting equipment for magnetic metal particles on the surface of the flexible film material according to any one of claims 1 to 7, the steps of attaching a roll-shaped flexible film material to an unwinding roller and unwinding it, and transporting the flexible film material to the winding roller by the transport device and winding it up; the step of adsorbing magnetic metal particles on the surface of the flexible film material by the magnetic member, A method for collecting magnetic metal particles on the surface of a flexible film material, characterized in that...

10. Controlling the transport speed of the flexible film material to be 10 m / min or more and 100 m / min or less, and / or controlling the distance between the magnetic member and the surface of the flexible film material to be more than 0 mm and 20 mm or less, and / or controlling the tension of the flexible film material to be 3 N or more and 100 N or less, A method for collecting magnetic metal particles on the surface of a flexible film material according to claim 9, characterized in that...

11. The step of collecting magnetic metal particles on the surface of the flexible film material by adopting the collecting method according to claim 10, the step of transferring the magnetic metal particles adsorbed on the magnetic member to the adhesive tape, the step of detecting magnetic metal particles on the adhesive tape, A method for detecting magnetic metal particles on the surface of a flexible film material, characterized in that...

12. Detecting magnetic metal particles on the adhesive tape by polarization, A method for detecting magnetic metal particles on the surface of a flexible film material according to claim 11, characterized in that...

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