WO2024002333A1 - 柔性膜材表面磁性金属颗粒的收集设备、收集方法和检测方法 - Google Patents

柔性膜材表面磁性金属颗粒的收集设备、收集方法和检测方法 Download PDF

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Publication number
WO2024002333A1
WO2024002333A1 PCT/CN2023/104576 CN2023104576W WO2024002333A1 WO 2024002333 A1 WO2024002333 A1 WO 2024002333A1 CN 2023104576 W CN2023104576 W CN 2023104576W WO 2024002333 A1 WO2024002333 A1 WO 2024002333A1
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WO
WIPO (PCT)
Prior art keywords
metal particles
flexible film
magnetic
magnetic metal
film material
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Application number
PCT/CN2023/104576
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English (en)
French (fr)
Inventor
刘科
金骋
武亚红
李学法
张国平
Original Assignee
扬州纳力新材料科技有限公司
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Publication date
Priority claimed from CN202210759828.XA external-priority patent/CN115106191A/zh
Application filed by 扬州纳力新材料科技有限公司 filed Critical 扬州纳力新材料科技有限公司
Publication of WO2024002333A1 publication Critical patent/WO2024002333A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated

Definitions

  • the invention relates to the technical field of surface detection of flexible membrane materials, and in particular, to a collection device for magnetic metal particles on the surface of flexible membrane materials, a method of collecting magnetic metal particles on the surface of flexible membrane materials, and a detection method of magnetic metal particles on the surface of flexible membrane materials.
  • These transmission components are often made of magnetic metals such as iron. Friction and wear will occur during the operation of the transmission components. At this time, some magnetic metal particles will be produced. When these magnetic metal particles fall on the surface of the flexible membrane material, they will affect the surface properties of the membrane material. And when a film material with magnetic metal particles attached to its surface is used in battery assembly, it will also cause greater harm to the battery. For example, magnetic metal particles can pierce the separator and cause a short circuit. At the same time, the attachment of magnetic metal particles can also cause uneven distribution of active materials and affect battery cycle performance. Therefore, removing magnetic metal particles on the surface of flexible membranes is of great significance to improving the performance of flexible membranes.
  • a collection equipment for magnetic metal particles on the surface of flexible film materials including a frame, an unwinding roller, a transmission device, a magnetic part and a winding roller; the transmission device is connected to the frame, and a transmission device is provided on the transmission device channel, the transmission channel has a feed end and a discharge end; the unwinding roller and the rewinding roller are respectively connected to the frame, and the unwinding roller is located at the feeding end of the transmission channel.
  • the winding roller is located at the discharge end of the transmission channel for winding flexible film material;
  • the magnetic component is connected to the frame, and the magnetic component is located on the At least one side of the transmission channel is used to adsorb magnetic metal particles on the surface of the flexible film material.
  • the magnetic component is formed by splicing multiple magnetic blocks in sequence.
  • the magnetic component is reversibly connected to the frame.
  • a guide member is provided on the frame, and the magnetic member is movably connected to the guide member for adjusting the distance between the magnetic member and the transmission channel, thereby adjusting the The distance between the magnetic part and the surface of the flexible membrane.
  • the transmission device includes a guide roller connected to the frame for guiding the flexible film material through the transmission channel.
  • the device for collecting magnetic metal particles on the surface of the flexible film material further includes a pressure roller, the pressure roller is movably connected to the frame, and the distance between the pressure roller and the winding roller is It is adjustable, and the pressure roller can move to abut the flexible film material on the winding roller.
  • the device for collecting magnetic metal particles on the surface of the flexible film material further includes a tension roller, and the tension roller is connected to the frame for adjusting the tension of the flexible film material.
  • the present invention provides another technical solution embodiment, that is, a collection and detection system for magnetic metal particles on the surface of flexible membrane materials including:
  • the device for collecting magnetic metal particles on the surface of flexible membrane materials according to any of the above embodiments;
  • a metal particle transfer module including a tape for pasting magnetic metal particles on the magnetic part, a driving unit that drives the tape to move against and away from the magnetic part;
  • a polarized light detection module is used to detect magnetic metal particles on the tape.
  • a method for collecting magnetic metal particles on the surface of flexible film materials, using the device for collecting magnetic metal particles on the surface of flexible film materials described in any of the above embodiments, the collection method includes the following steps:
  • the magnetic metal particles on the surface of the flexible film material are absorbed by the magnetic component.
  • the transmission speed of the flexible film material is controlled to be greater than or equal to 10 m/min and less than or equal to 100 m/min, preferably 15 m/min ⁇ 80 m/min, and further preferably 20 m/min ⁇ 50 m/min.
  • the distance between the magnetic component and the surface of the flexible film material is controlled to be greater than 0 mm and less than or equal to 20 mm, preferably 1 mm to 15 mm, and further preferably 2 mm to 5 mm.
  • the tension of the flexible film material is controlled to be greater than or equal to 3N and less than or equal to 100N, preferably 5N to 80N, and further preferably 10N to 60N.
  • a method for detecting magnetic metal particles on the surface of flexible membrane materials including the following steps:
  • the magnetic metal particles on the tape are detected by polarized light.
  • the flexible film material is transported mainly through the cooperation of the unwinding roller, the transmission device, the magnetic parts and the winding roller, and the flexible film material is transported through the transmission device.
  • Rewind and unwind flexible membrane materials are used.
  • the magnetic metal particles on the surface of the flexible film material are adsorbed by magnetic components to collect the magnetic metal particles on the surface of the flexible film material.
  • the magnetic metal particles on the surface of the flexible membrane are collected through the above collection equipment, so that the magnetic metal particles on the surface of the flexible membrane are effectively removed, thereby improving the surface condition of the flexible membrane and improving the performance of the flexible membrane.
  • the above-mentioned method of collecting magnetic metal particles on the surface of flexible membrane materials uses the device for collecting magnetic metal particles on the surface of flexible membrane materials.
  • the operation method is simple and easy, and there is no need to rely on complicated equipment. and operation, which can reduce the cost of collecting and removing magnetic metal particles on the surface of flexible membrane materials, and improve the efficiency of collecting and removing magnetic metal particles on the surface of flexible membrane materials.
  • the above-mentioned method for detecting magnetic metal particles on the surface of the flexible film material mainly collects the magnetic metal particles on the surface of the flexible film material to the surface of the magnetic part through the above-mentioned collection method of magnetic metal particles on the surface of the flexible film material, and then collects the magnetic metal particles on the surface of the magnetic part. Transfer to tape and detect magnetic metal particles on the tape.
  • the magnetic metal particles transferred to the tape serve as magnetic metal particles on the surface of the entire flexible film material, which can represent the surface state of the entire flexible film material, thereby improving the authenticity of the detection. and reliability.
  • the size and number of magnetic metal particles can be accurately determined by detecting the particles on the tape through polarized light, and more truly reflects the surface state of the flexible membrane material.
  • Figure 1 is a schematic structural diagram of a device for collecting magnetic metal particles on the surface of a flexible film material in an embodiment of the present invention.
  • connection In the present invention, unless otherwise clearly stated and limited, the terms “installation”, “connection”, “connection”, “fixing” and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or It can be indirectly connected through an intermediary, it can be the internal connection between two elements or the interactive relationship between two elements, unless otherwise expressly limited.
  • fixing and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or It can be indirectly connected through an intermediary, it can be the internal connection between two elements or the interactive relationship between two elements, unless otherwise expressly limited.
  • the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
  • one embodiment of the present invention provides a device 100 for collecting magnetic metal particles on the surface of a flexible film material.
  • the equipment 100 for collecting magnetic metal particles on the surface of flexible film materials includes a frame 101, an unwinding roller 102, a transmission device, a magnetic component 104 and a rewinding roller 105; the transmission device is connected to the frame 101, and a transmission channel is provided on the transmission device.
  • the transmission channel has a feed end and a discharge end; the unwinding roller 102 and the winding roller 105 are respectively connected to the frame 101, and the unwinding roller 102 is located at the feeding end of the transmission channel for unwinding the flexible film material 200.
  • the rolling roller 105 is located at the discharge end of the transmission channel for rolling up the flexible film material 200; the magnetic component 104 is connected to the frame 101, and the magnetic component 104 is located on at least one side of the transmission channel for adsorbing the surface of the flexible film material 200.
  • Magnetic metal particles The device 100 for collecting magnetic metal particles on the surface of the flexible film material in this embodiment mainly uses the cooperation of the unwinding roller 102, the transmission device, the magnetic component 104 and the winding roller 105 to transport the flexible film material 200 through the transmission device.
  • the winding roller 102 and the winding roller 105 respectively wind and unwind the flexible film material 200 .
  • the magnetic metal particles on the surface of the flexible film material 200 are adsorbed by the magnetic component 104 to collect the magnetic metal particles on the surface of the flexible film material 200 .
  • the magnetic metal particles on the surface of the flexible membrane material 200 are collected through the above collection equipment, so that the magnetic metal particles on the surface of the flexible membrane material 200 are effectively removed, thereby improving the surface condition of the flexible membrane material 200 and improving the quality of the flexible membrane material 200 usage performance.
  • a magnetic component 104 is provided on the side to adsorb particles on at least one surface of the flexible film material 200 .
  • magnetic components 104 are provided on both sides of the transmission channel.
  • the multiple magnetic members 104 there are multiple magnetic members 104, and the multiple magnetic members 104 are respectively disposed on both sides of the transmission channel.
  • the number of magnetic components 104 is 2 to 10.
  • the number of magnetic components 104 may be, but is not limited to, 2, 3, 5, 6, 8, etc.
  • the number of magnetic members 104 is two, and the two magnetic members 104 are respectively disposed on both sides of the transmission channel.
  • the number of magnetic components 104 is an even number, and further optionally, the magnetic components 104 on both sides of the transmission channel are staggered. Further optionally, the magnetic components 104 on both sides of the transmission channel are arranged oppositely one by one.
  • the magnetic component 104 is reversibly connected to the frame 101 .
  • the magnetic metal particles adsorbed on the magnetic part 104 can be easily transferred to the tape by turning the magnetic part 104 over.
  • the magnetic component 104 is connected to the frame 101 through a hinge (not shown in the figure).
  • the hinge connection can facilitate the reversible connection of the magnetic component 104 to the frame 101.
  • the buckle is a stainless steel hinge.
  • the magnetic member 104 is a permanent magnet or an electromagnet.
  • the magnetic component 104 is a magnetic component 104 with a magnetic field strength of 8000GS to 20000GS.
  • the magnetic field strength of the magnetic component 104 may be, but is not limited to, 8000GS, 1000GS, 12000GS, 15000GS, 18000GS, etc.
  • the magnetic field strength of the permanent magnet is 8000GS ⁇ 12000GS.
  • the magnetic field strength of the electromagnet is 8000GS ⁇ 20000GS.
  • the magnetic component 104 is composed of multiple magnetic blocks spliced in sequence. Specifically, the magnetic component 104 is composed of multiple magnetic blocks sequentially spliced along its length direction. By splicing multiple magnet blocks into the magnetic component 104, a more uniform magnetic field can be obtained and the dead spots of adsorption can be reduced.
  • the number of magnetic blocks is 2 to 10.
  • the number of magnetic blocks may be but is not limited to 2, 3, 5, 6, 8, etc.
  • the length of the magnetic block is 0.1m ⁇ 0.5m.
  • the length of the magnet block may be, but is not limited to, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm, etc.
  • the plurality of magnet blocks in the magnetic component 104 are the same magnet blocks.
  • the frame 101 is provided with a guide 109, and the magnetic member 104 is movably connected to the guide 109 for adjusting the distance between the magnetic member 104 and the transmission channel, and thereby adjusting the distance between the magnetic member 104 and the flexible film material. 200 distance between surfaces.
  • the guide member 109 it is convenient to adjust the position of the magnetic member 104, thereby adjusting the distance between the magnetic member 104 and the surface of the flexible film material 200, and improving the adsorption effect of the magnetic member 104 on the magnetic metal particles on the surface of the flexible film material 200.
  • the guide 109 is a slide rail. At this time, the magnetic component 104 is slidably connected to the guide component 109 .
  • a slide block is provided on the slide rail.
  • the slide block can slide on the slide rail.
  • the magnetic component 104 is fixed on the slide block, and the sliding of the slide block drives the magnetic component 104 along the slide rail. Slide movement.
  • the magnetic part 104 is installed on the slider through a hinge, the distance between the magnetic part 104 and the surface of the flexible membrane 200 is adjustable, and the magnetic part 104 can be turned over through the hinge, so that it can be conveniently moved
  • the magnetic metal particles adsorbed on the magnetic piece 104 are transferred to the tape.
  • the magnetic part 104 is moved away from the surface of the flexible film material 200 through the guide 109 so that the equipment has enough space to facilitate the tape pasting operation.
  • a rotary driving element is installed on the slider, and the rotary driving element is used to drive the magnetic part to flip.
  • the hinge includes a first part fixed on the slider and a second part fixed on the magnetic component 104, and the first part and the second part can rotate relative to each other.
  • the rotary drive element is a motor, the body of which is fixedly mounted on the slider, and the output shaft is connected to the second part. When the rotary drive element is started, it drives the second part to rotate, thereby causing the magnetic member 104 to flip over.
  • the transmission device includes a guide roller 103, and the guide roller 103 is connected to the frame 101 for guiding the flexible film material 200 through the transmission channel. It can also be understood that the guide roller 103 cooperates with the unwinding roller 102 and the winding roller 105 to form a transmission channel. Further, the number of guide rollers 103 is 1 to 20. For example, the number of guide rollers 103 may be, but is not limited to, 2, 3, 5, 6, 8, 10, 12, 15, 18, etc. Furthermore, there are multiple guide rollers 103 .
  • the shape of the transmission channel can be flexibly designed, thereby adjusting the transmission direction of the flexible film material 200, and at the same time, the stability of the transmission of the flexible film material 200 can be improved.
  • the number of guide rollers 103 is nine, and the flexible film material 200 can be stably transported through the arrangement of nine guide rollers 103 .
  • the device 100 for collecting magnetic metal particles on the surface of the flexible film material also includes a pressure roller 106.
  • the pressure roller 106 is movably connected to the frame 101.
  • the distance between the pressure roller 106 and the winding roller 105 is adjustable, and The pressure roller 106 can move to abut the flexible film material 200 on the winding roller 105 .
  • the pressure roller 106 is provided on the frame 101.
  • the device 100 for collecting magnetic metal particles on the surface of the flexible film material also includes a tension roller 107 , which is connected to the frame 101 for adjusting the tension of the flexible film material 200 .
  • the tension roller 107 Through the arrangement of the tension roller 107, the tension of the flexible film material 200 can be adjusted, so that the flexible film material 200 can be transported and rolled up more smoothly.
  • the device 100 for collecting magnetic metal particles on the surface of flexible film materials also includes a backup roller 108 , which is connected to the frame 101 for replacing the guide roller 103 .
  • the spare roller 108 is used to replace the guide roller 103 so that the device 100 for collecting magnetic metal particles on the surface of the flexible film material can work stably.
  • the flexible film material 200 can be transported normally while maintaining On the basis of reducing the use of rollers.
  • ceramic bearings are selected as the bearings in the equipment.
  • protective covers are installed on worn rotating parts to further reduce the impact of particles generated during equipment operation on collection and detection.
  • the device 100 for collecting magnetic metal particles on the surface of the flexible film material is a device for collecting magnetic particles on the surface of the flexible film material 200 .
  • the magnetic particles are particles that can be adsorbed by the magnetic member 104 .
  • Another embodiment of the present invention provides a system for collecting and detecting magnetic metal particles on the surface of flexible film materials, including: the above-mentioned collection device 100 for collecting magnetic metal particles on the surface of flexible film materials, a metal particle transfer module and a polarized light detection module;
  • the metal particle transfer module includes a tape for pasting magnetic metal particles on the magnetic component 104 and a driving unit that drives the tape to move against and away from the magnetic component 104 .
  • the driving unit is a pneumatic cylinder or an electric cylinder.
  • the polarized light detection module is used to detect magnetic metal particles on the tape.
  • the polarized light detection module can emit polarized light, and detect the particles on the tape through the polarized light, so that the size and quantity of the magnetic metal particles can be accurately determined, and the surface state of the flexible film material 200 can be more truly reflected.
  • Another embodiment of the present invention provides a method for collecting magnetic metal particles on the surface of flexible film material 200 .
  • This collection method uses the above-mentioned collection device 100 of magnetic metal particles on the surface of flexible film materials.
  • the collection method includes the following steps: install the roll-shaped flexible film material 200 on the unwinding roller 102 and unwind it, and transport the flexible film material 200 through the transmission device The film is rolled up by the winding roller 105; the magnetic metal particles on the surface of the flexible film material 200 are absorbed by the magnetic member 104.
  • the collection The collection method is simple and easy to operate and does not need to rely on complicated equipment and operations. It can reduce the cost of collecting and removing magnetic metal particles on the surface of the flexible membrane material 200 and improve the efficiency of collecting and removing magnetic metal particles on the surface of the flexible membrane material 200 .
  • the transmission speed of the flexible film material 200 is controlled to be greater than or equal to 10 m/min and less than or equal to 100 m/min.
  • the transmission speed can be designed according to the production plan, order arrangement, etc.
  • the transmission speed of the flexible membrane material 200 is controlled to be 10m/min, 30m/min, 50m/min, 60m/min, 80m/min or 90m/min, etc.
  • the distance between the magnetic member 104 and the surface of the flexible film material 200 is controlled to be greater than 0 mm and less than or equal to 20 mm.
  • the magnetic field strength of the magnetic component 104 gradually weakens from near to far. The smaller the distance between the magnetic component 104 and the surface of the flexible membrane material 200, the greater the interaction strength between the magnetic component 104 and the particles on the surface of the flexible membrane material 200, and the adsorption force will be greater. The better.
  • the distance between the magnetic part 104 and the surface of the flexible membrane 200 mainly depends on the flatness of the flexible membrane 200. The distance must be small and the magnetic part 104 must not touch the surface of the flexible membrane 200.
  • control the distance between the magnetic component 104 and the surface of the flexible film material 200 to be 1 mm, 5 mm, 8 mm, 10 mm, 15 mm or 18 mm, etc.
  • the distance between the control magnetic component 104 and the surface of the flexible film material 200 is 2 mm to 5 mm.
  • the tension of the flexible film material 200 is controlled to be greater than or equal to 3N and less than or equal to 100N.
  • the tension of the flexible membrane material 200 is controlled to be 5N, 10N, 20N, 50N or 80N, etc.
  • the following steps are also included: cleaning the collection device 100 of the magnetic metal particles on the surface of the flexible film material, specifically, cleaning the collection device 100 of the magnetic metal particles on the surface of the flexible film material.
  • the rollers, magnetic parts 104, etc. of the collection equipment are cleaned. More specifically, alcohol, lint-free cloth, tape, etc. are used to clean the rollers, magnetic parts 104, etc. of the collection device.
  • Another embodiment of the present invention provides a method for detecting magnetic metal particles on the surface of flexible film material 200 .
  • the method for detecting magnetic metal particles on the surface of the flexible film material 200 includes the following steps: using the above collection method to collect the magnetic metal particles on the surface of the flexible film material 200; transferring the magnetic metal particles adsorbed by the magnetic member 104 to the tape; and detecting the magnetic properties on the tape. Metal particles are detected.
  • the particles on the surface of the flexible film material 200 are mainly collected to the surface of the magnetic component 104 through the above-mentioned method of collecting magnetic metal particles on the surface of the flexible film material 200, and then the magnetic metal particles on the surface of the magnetic component 104 are transferred to the tape. The magnetic metal particles on the tape were then detected.
  • the magnetic metal particles transferred to the tape serve as magnetic metal particles on the surface of the entire flexible film material 200, which can represent the surface state of the entire flexible film material 200, thereby improving detection. authenticity and reliability.
  • the above-mentioned method for detecting magnetic metal particles on the surface of the flexible film material 200 has a wide range of applications, and can obtain relatively accurate test results for both transparent and opaque flexible film materials 200 .
  • the traditional method mainly uses the scanning electron microscope method and the CCD surface defect detection method.
  • the scanning electron microscope method is to cut the test object from the roll to make a 3mm ⁇ 5mm electron microscope sample, place it on the test sample stage, and use a narrow high-energy electron beam focused by the electron microscope to scan the sample. It interacts with substances to stimulate various physical information. This information is collected, amplified, and re-imaged to characterize the microscopic morphology of the substance.
  • the electron microscope system is equipped with an EDS elemental analysis function to analyze the elemental composition of microscopic surface substances. Whether the surface contains magnetic metal particles.
  • the CCD surface defect detection method is aimed at thin film materials with high light transmittance.
  • the system adopts transmission lighting detection method. Detection, that is, the light source is below the film and the camera captures images above the film.
  • the system collects the production line operating status information in real time through the encoder and starts detection.
  • the system uses the images collected by the camera to process defects through SIMV image analysis software. Because the defects and normal product images are obviously different on the gray scale. Differences allow the system to detect defects and determine the size, location, type and other information of the defects through further calculation and analysis.
  • This CCD surface defect detection method has a narrow application range.
  • the main inspection object is light-transmitting materials, and the application range is narrow. It cannot be used for opaque materials such as copper foil and aluminum foil.
  • the magnetic metal particles on the tape are detected by polarized light.
  • the particles on the tape can be detected by polarized light, so that the size and quantity of the magnetic metal particles can be accurately determined, and the surface state of the flexible membrane material 200 can be more truly reflected.
  • the physical properties of the metal surface determine that light cannot enter the metal material, and it will reflect the incident light like a mirror. After the incident light is reflected by the metal surface, the reflected light has the same vibration direction as the incident light; after the incident light passes through the non-metallic material, its vibration direction will change (the main reason is that the light enters the interior of the non-metallic material) and passes through the non-metallic material.
  • the reflected light that comes out after entering the non-metallic material is no longer polarized, and its direction will also change.
  • polarized light can enter the camera through polarizers with the same direction.
  • the two polarizers are in a cross position (one of them is rotated 90 degrees), the polarized reflected light cannot pass through the second polarizer.
  • the magnetic metal particles are black in the cross state, so as to determine whether they are magnetic metal particles, as well as their size and quantity, and more truly reflect the surface state of the flexible membrane material 200 .
  • a JOMES polarized light testing instrument to detect the particles on the tape.
  • the tape includes Mylar tape, transparent tape, double-sided tape or PP tape.
  • the tape is Mylar tape.
  • the Mylar tape is cut into a square with a width of 5 mm ⁇ 5 mm, and the particles are transferred by moving 4 cm each time, and the adhesion is repeated three times at each position.
  • the tape is used to perform sticky transfer of the magnetic metal particles adsorbed by the magnetic component 104 .
  • the requirements for particle transfer meet the following two requirements: the number of the second sticking is less than 30% of the sum of the previous two times, and the number of the last sticking is less than 10% of the sum of all previous times.

Abstract

一种柔性膜材表面磁性金属颗粒的收集设备、收集方法和检测方法。柔性膜材表面磁性金属颗粒的收集设备（100）中，通过放卷辊（102）、传输装置、磁性件（104）以及收卷辊（103）的配合，通过传输装置对柔性膜材（200）进行传输，通过放卷辊（102）和收卷辊（103）分别对柔性膜材（200）进行收卷和放卷。在柔性膜材（200）的传输过程中，通过磁性件（104）对柔性膜材（200）表面的金属颗粒进行吸附，以收集柔性膜材（200）表面的磁性金属颗粒。同时，通过上述收集设备（100）对柔性膜材（200）表面的金属颗粒进行收集，使得柔性膜材（200）表面的磁性金属颗粒得到了有效去除，进而可以改善柔性膜材（200）的表面状态，改善柔性膜材（200）的使用性能。

Description

柔性膜材表面磁性金属颗粒的收集设备、收集方法和检测方法 技术领域
本发明涉及柔性膜材表面检测技术领域，尤其是涉及一种柔性膜材表面磁性金属颗粒的收集设备、柔性膜材表面磁性金属颗粒的收集方法以及柔性膜材表面磁性金属颗粒的检测方法。
背景技术
随着柔性膜材的不断普及，生产上对柔性膜材的性能要求也越来越高。对于柔性膜材的性能而言，其主要体现在膜材的自身性能和表面状态这两个方面。膜材的自身性能直接影响到膜材的使用，膜材的表面状态对膜材的使用也具有重要的影响。比如，在锂电池的制备过程中，会使用到诸如铜箔、铝箔隔膜以及集流体等柔性膜材。这些柔性膜材在生产和使用过程中，通常需要通过采用传动辊进行传输，或者需要在多种机器中转运和加工，此时传动辊的连接处会使用到一些比如轴承、齿轮等传动部件，而这些传动部件往往是采用铁等磁性金属制成的。在传动部件工作的过程中会出现摩擦和磨损，此时会产生一些磁性金属颗粒，当这些磁性金属颗粒落到柔性膜材的表面时，会影响膜材的表面性能。并且当将表面附着有磁性金属颗粒的膜材应用到电池的装配中时，也会对电池产生较大的危害。例如，磁性金属颗粒可以刺穿隔膜造成短路，同时磁性金属颗粒的附着也可以导致活性物质分布不均而影响电池循环性能。因此，对柔性膜材表面的磁性金属颗粒进行去除对改善柔性膜材的使用性能具有重要意义。
发明内容
基于此，有必要提供一种能够有效收集柔性膜材表面的磁性金属颗粒的设备以及收集方法和对磁性金属颗粒进行检测的方法。
为了解决以上技术问题，本发明一实施例的技术方案为：
一种柔性膜材表面磁性金属颗粒的收集设备，包括机架、放卷辊、传输装置、磁性件以及收卷辊；所述传输装置连接于所述机架，所述传输装置上设有传输通道，所述传输通道具有进料端和出料端；所述放卷辊和所述收卷辊分别连接于所述机架，且所述放卷辊位于所述传输通道的进料端以用于放卷柔性膜材，所述收卷辊位于所述传输通道的出料端以用于收卷柔性膜材；所述磁性件连接于所述机架，且所述磁性件位于所述传输通道的至少一侧以用于吸附柔性膜材表面的磁性金属颗粒。
在其中一个实施例中，所述磁性件有多个，多个所述磁性件分别设于所述传输通道的两侧。
在其中一个实施例中，所述磁性件由多个磁块依次拼接而成。
在其中一个实施例中，所述磁性件可翻转地连接于所述机架上。
在其中一个实施例中，所述机架上设有引导件，所述磁性件活动连接于所述引导件以用于调节所述磁性件与所述传输通道之间的距离，进而调节所述磁性件与柔性膜材的表面之间的距离。
在其中一个实施例中，所述传输装置包括导料辊，所述导料辊连接于所述机架以用于引导柔性膜材穿过所述传输通道。
在其中一个实施例中，所述柔性膜材表面磁性金属颗粒的收集设备还包括压力辊，所述压力辊活动连接于所述机架，所述压力辊与所述收卷辊之间的距离可调，且所述压力辊能够运动至抵接于所述收卷辊上的柔性膜材。
在其中一个实施例中，所述柔性膜材表面磁性金属颗粒的收集设备还包括张力辊，所述张力辊连接于所述机架以用于调节柔性膜材的张力。
本发明提供另一个技术解决方案实施例，即一种柔性膜材表面磁性金属颗粒的收集与检测系统包括：
上述任一实施例所述的柔性膜材表面磁性金属颗粒的收集设备；
金属颗粒转移模块，包括用于粘贴磁性件上的磁性金属颗粒的胶带、驱动胶带贴靠及远离磁性件移动的驱动单元；和
偏振光检测模块，用于检测所述胶带上的磁性金属颗粒。
一种柔性膜材表面磁性金属颗粒的收集方法，采用上述任一实施例中所述的柔性膜材表面磁性金属颗粒的收集设备，所述收集方法包括如下步骤：
将卷状柔性膜材安装到放卷辊上放卷，并将柔性膜材通过所述传输装置传输至所述收卷辊收卷；
通过所述磁性件吸附柔性膜材表面的磁性金属颗粒。
在其中一个实施例中，控制柔性膜材的传输速度大于等于10m/min且小于等于100m/min，优选为15m/min～80m/min，进一步优选为20m/min～50m/min。
在其中一个实施例中，控制所述磁性件与所述柔性膜材的表面之间的距离大于0mm且小于等于20mm，优选为1mm～15mm，进一步优选为2mm～5mm。
在其中一个实施例中，控制柔性膜材的张力大于等于3N且小于等于100N，优选为5N～80N，进一步优选为10N～60N。
一种柔性膜材表面磁性金属颗粒的检测方法，包括如下步骤：
采用所述的收集方法收集柔性膜材表面的磁性金属颗粒；
将所述磁性件吸附的磁性金属颗粒转移到胶带上；
对所述胶带上的磁性金属颗粒进行检测。
在其中一个实施例中，通过偏振光对所述胶带上的磁性金属颗粒进行检测。
上述柔性膜材表面磁性金属颗粒的收集设备中，主要通过放卷辊、传输装置、磁性件以及收卷辊的配合，通过传输装置对柔性膜材进行传输，通过放卷辊和收卷辊分别对柔性膜材进行收卷和放卷。在柔性膜材的传输过程中，通过磁性件对柔性膜材表面的磁性金属颗粒进行吸附，以收集柔性膜材表面的磁性金属颗粒。同时，通过上述收集设备对柔性膜材表面的磁性金属颗粒进行收集，使得柔性膜材表面的磁性金属颗粒得到了有效去除，进而可以改善柔性膜材的表面状态，改善柔性膜材的使用性能。
上述柔性膜材表面磁性金属颗粒的收集方法采用该柔性膜材表面磁性金属颗粒的收集设备，在对柔性膜材表面的磁性金属颗粒进行收集时，操作方法简单易行，不需要依赖复杂的设备和操作，可以降低柔性膜材表面磁性金属颗粒的收集和去除的成本，提高柔性膜材表面磁性金属颗粒的收集和去除的效率。
上述柔性膜材表面磁性金属颗粒的检测方法，主要通过上述柔性膜材表面磁性金属颗粒的收集方法将柔性膜材表面的磁性金属颗粒收集至磁性件的表面，再将磁性件表面的磁性金属颗粒转移到胶带上，然后对胶带上的磁性金属颗粒进行检测。在上述柔性膜材表面磁性金属颗粒的检测方法中，转移到胶带上的磁性金属颗粒作为整个柔性膜材表面的磁性金属颗粒，可以代表整个柔性膜材的表面状态，进而可以提高检测的真实性和可靠性。
进一步地，在对柔性膜材表面磁性金属颗粒进行检测时，通过偏振光对胶带上的颗粒进行检测，可以准确地判断磁性金属颗粒的大小和数量，更加真实地反映柔性膜材的表面状态。
附图说明
图1为本发明一实施例中柔性膜材表面磁性金属颗粒的收集设备的结构示意图。
图中标记说明：
100、柔性膜材表面磁性金属颗粒的收集设备；101、机架；102、放卷辊；
103、导料辊；104、磁性件；105、收卷辊；106、压力辊；107、张力辊；108、备用辊；109、引导件；200、柔性膜材。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本发明。但是本发明能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似改进，因此本发明不受下面公开的具体实施例的限制。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也 可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1，本发明一实施例提供了一种柔性膜材表面磁性金属颗粒的收集设备100。该柔性膜材表面磁性金属颗粒的收集设备100包括机架101、放卷辊102、传输装置、磁性件104以及收卷辊105；传输装置连接于机架101，传输装置上设有传输通道，传输通道具有进料端和出料端；放卷辊102和收卷辊105分别连接于机架101，且放卷辊102位于传输通道的进料端以用于放卷柔性膜材200，收卷辊105位于传输通道的出料端以用于收卷柔性膜材200；磁性件104连接于机架101，且磁性件104位于传输通道的至少一侧以用于吸附柔性膜材200表面的磁性金属颗粒。本实施例的柔性膜材表面磁性金属颗粒的收集设备100中主要通过放卷辊102、传输装置、磁性件104以及收卷辊105的配合，通过传输装置对柔性膜材200进行传输，通过放卷辊102和收卷辊105分别对柔性膜材200进行收卷和放卷。在柔性膜材200的传输过程中，通过磁性件104对柔性膜材200表面的磁性金属颗粒进行吸附，以收集柔性膜材200表面的磁性金属颗粒。同时，通过上述收集设备对柔性膜材200表面的磁性金属颗粒进行收集，使得柔性膜材200表面的磁性金属颗粒得到了有效去除，进而可以改善柔性膜材200的表面状态，改善柔性膜材200的使用性能。
可以理解的是，柔性膜材200在传输通道中传输时，在传输通道的至少一 侧设置磁性件104，可以对柔性膜材200的至少一个表面的颗粒进行吸附。为了提高磁性件104对柔性膜表面的颗粒的吸附效果，在传输通道的两侧均设置磁性件104。
具体地，磁性件104有多个，多个磁性件104分别设于传输通道的两侧。可选地，磁性件104的数量为2个～10个。比如，磁性件104的数量可以是但不限定为2个、3个、5个、6个、8个等。在图1所示的实施例中，磁性件104的数量为2个，2个磁性件104分别设于传输通道的两侧。可选地，磁性件104的数量为偶数个，进一步可选地，传输通道两侧的磁性件104错开设置。进一步地可选地，传输通道两侧的磁性件104分别一一相对设置。
在一个具体的示例中，磁性件104可翻转连接于机架101。通过对磁性件104的翻转可以方便地将磁性件104上吸附的磁性金属颗粒转移到胶带上。可选地，磁性件104与机架101通过合页(图中未示出)连接，通过合页连接的方式可以方便地实现磁性件104可翻转连接于机架101。具体地，卡扣为不锈钢合页。
在一个具体的示例中，磁性件104为永磁铁或电磁铁。可选地，磁性件104为8000GS～20000GS磁场强度的磁性件104。可选地，磁性件104的磁场强度可以是但不限定为8000GS、1000GS、12000GS、15000GS、18000GS等。进一步可选地，永磁铁的磁场强度为8000GS～12000GS。电磁铁的磁场强度为8000GS～20000GS。
在一个具体的示例中，磁性件104由多个磁块依次拼接而成。具体地，磁性件104由多个磁块沿其长度方向依次拼接而成。通过多个磁块拼接成磁性件104，可以获得更加均匀的磁场，减少吸附死角。可选地，磁块的数量为2～10。譬如，磁块的数量可以是但不限定为2个、3个、5个、6个、8个等。进一步 可选地，磁块的长度为0.1m～0.5m。比如，磁块的长度可以是但不限定为0.1mm、0.2mm、0.3mm、0.4mm或0.5mm等。又一步可选地，磁性件104中多个磁块为相同的磁块。
在一个具体的示例中，机架101上设有引导件109，磁性件104活动连接于引导件109以用于调节磁性件104与传输通道之间的距离，进而调节磁性件104与柔性膜材200的表面之间的距离。通过引导件109的设置，便于对磁性件104的位置进行调节，进而调节磁性件104与柔性膜材200的表面之间的距离，改善磁性件104对柔性膜材200表面磁性金属颗粒的吸附效果。可选地，引导件109为滑轨。此时，磁性件104滑动连接于引导件109。可以理解的是，为了便于磁性件104的安装，在滑轨上设置滑块，滑块可以在滑轨上滑动，磁性件104固定于滑块上，进而通过滑块的滑动带动磁性件104沿滑轨运动。
在一个具体的示例中，磁性件104通过合页安装在滑块上，磁性件104与柔性膜材200的表面之间的距离可调节，并且磁性件104可通过合页翻转，可以方便地将磁性件104上吸附的磁性金属颗粒转移到胶带上。当需要将转移磁性件104磁性金属颗粒时，通过引导件109将磁性件104远离柔性膜材200的表面，使设备具有足够的空间便于胶带粘贴作业，在磁性件104滑动的过程中或者磁性件104停止滑动后，翻转磁性件104使得磁性件104的吸附面由朝向柔性膜材表面转至朝向背离机架100的方向，便于胶带粘贴磁性金属颗粒。
进一步地，滑块上安装有旋转驱动元件，旋转驱动元件用于驱动磁性件翻转。具体而言，合页包括固定在滑块上的第一部分和固定于磁性件104的第二部分，第一部分与第二部分可相对旋转。旋转驱动元件为电机，其机体固定安装在滑块上，输出轴与第二部分连接，旋转驱动元件启动时通过驱动第二部分旋转，从而使磁性件104翻转。
可以理解的是，传输装置包括导料辊103，导料辊103连接于机架101以用于引导柔性膜材200穿过传输通道。还可以理解的是，导料辊103与放卷辊102和收卷辊105配合形成传输通道。进一步地，导料辊103的数量为1～20。比如，导料辊103的数量可以是但不限定为2个、3个、5个、6个、8个、10个、12个、15个、18个等。又进一步地，导料辊103有多个。通过多个导料辊103的设置可以对传输通道的形状进行灵活设计，进而对柔性膜材200的传输方向进行调节，同时也能够提高柔性膜材200传输的稳定性。在图1所示的实施例中，导料辊103的数量为9个，通过9个导料辊103的设置，对柔性膜材200进行稳定传输。
在一个具体的示例中，柔性膜材表面磁性金属颗粒的收集设备100还包括压力辊106，压力辊106活动连接于机架101，压力辊106与收卷辊105之间的距离可调，且压力辊106能够运动至抵接于收卷辊105上的柔性膜材200。在机架101上设置压力辊106，可以在收卷柔性膜材200时，通过压力辊106的挤压作用，排出收卷辊105上各层柔性膜材200之间的空气，使收卷更加稳定和紧实。
在一个具体的示例中，柔性膜材表面磁性金属颗粒的收集设备100还包括张力辊107，张力辊107连接于机架101以用于调节柔性膜材200的张力。通过张力辊107的设置，可以对柔性膜材200的张力进行调节，使柔性膜材200更加顺利地传输和收卷。
在另一个具体的示例中，柔性膜材表面磁性金属颗粒的收集设备100还包括备用辊108，备用辊108连接于机架101以用于替换导料辊103。当导料辊103出现损坏或者需要周期性更换时，使用备用辊108将导料辊103进行替换，使柔性膜材表面磁性金属颗粒的收集设备100稳定工作。
可以理解的是，为了减少放卷辊102、导料辊103、压力辊106、张力辊107以及收卷辊105等的转动产生颗粒对收集和检测的影响，可以在保持柔性膜材200正常转运的基础上，减少辊的使用。另外，为了降低收集设备运行过程中磁性金属颗粒的产生风险，在设备中的轴承选用陶瓷轴承。同时，在磨损转动部件处加装防护罩，进一步减少设备运行时产生的颗粒对收集和检测的影响。
在一个具体的示例中，柔性膜材表面磁性金属颗粒的收集设备100为柔性膜材200表面磁性颗粒的收集设备。其中，磁性颗粒为可以被磁性件104吸附的颗粒。
本发明还有一实施例提供了一种柔性膜材表面磁性金属颗粒的收集与检测系统，包括：上述的柔性膜材表面磁性金属颗粒的收集设备100、金属颗粒转移模块和偏振光检测模块；
金属颗粒转移模块包括用于粘贴磁性件104上的磁性金属颗粒的胶带、驱动胶带贴靠及远离磁性件104移动的驱动单元。胶带贴靠磁性件104时粘贴磁性件104上的磁性金属颗粒，然后驱动单元带动胶带远离磁性件104移动。驱动单元为气缸或电缸。
偏振光检测模块用于检测所述胶带上的磁性金属颗粒。偏振光检测模块可发射偏振光，通过偏振光对胶带上的颗粒进行检测，可以准确地判断磁性金属颗粒的大小和数量，更加真实地反映柔性膜材200的表面状态。
本发明还有一实施例提供了一种柔性膜材200表面磁性金属颗粒的收集方法。该收集方法采用上述柔性膜材表面磁性金属颗粒的收集设备100，收集方法包括如下步骤：将卷状柔性膜材200安装到放卷辊102上放卷，并将柔性膜材200通过传输装置传输至收卷辊105收卷；通过磁性件104吸附柔性膜材200表面的磁性金属颗粒。在对柔性膜材200表面的磁性金属颗粒进行收集时，该收 集方法操作方法简单易行，不需要依赖复杂的设备和操作，可以降低柔性膜材200表面磁性金属颗粒的收集和去除的成本，提高柔性膜材200表面磁性金属颗粒的收集和去除的效率。
可选地，在柔性膜材200表面磁性金属颗粒的收集方法中，控制柔性膜材200的传输速度大于等于10m/min且小于等于100m/min。柔性膜材200的传输速度越小，磁性件104与柔性膜材200表面的颗粒的作用时间越长，吸附效果越好。实际生产过程中可以根据生产计划排单等进行传输速度的设计。比如，控制柔性膜材200的传输速度为10m/min、30m/min、50m/min、60m/min、80m/min或90m/min等。
可选地，在柔性膜材200表面磁性金属颗粒的收集方法中，控制磁性件104与柔性膜材200的表面之间的距离大于0mm且小于等于20mm。磁性件104的磁场强度由近到远是逐渐减弱的，磁性件104与柔性膜材200的表面之间的距离越小，磁性件104与柔性膜材200表面的颗粒的作用强度越大，吸附效果越好。实际生产过程中磁性件104与柔性膜材200的表面之间的距离主要取决于柔性膜材200的平整度，既要距离小，同时需要保证磁性件104不能碰到柔性膜材200的表面，防止柔性膜材200表面的划伤，比如，控制磁性件104与柔性膜材200的表面之间的距离为1mm、5mm、8mm、10mm、15mm或18mm等。优选地，控制磁性件104与柔性膜材200的表面之间的距离为2mm～5mm。
可选地，在柔性膜材200表面磁性金属颗粒的收集方法中，控制柔性膜材200的张力大于等于3N且小于等于100N。比如，控制柔性膜材200的张力为5N、10N、20N、50N或80N等。
可以理解的是，将卷状柔性膜材200安装到放卷辊102上之前还包括如下步骤：对柔性膜材表面磁性金属颗粒的收集设备100进行清洗，具体地，对收 集设备的辊、磁性件104等进行清洗。更具体地，使用酒精、无尘布以及胶带等对收集设备的辊、磁性件104等进行清洗。
本发明还有一实施例提供了一种柔性膜材200表面磁性金属颗粒的检测方法。该柔性膜材200表面磁性金属颗粒的检测方法包括如下步骤：采用上述收集方法收集柔性膜材200表面的磁性金属颗粒；将磁性件104吸附的磁性金属颗粒转移到胶带上；对胶带上的磁性金属颗粒进行检测。该检测方法中，主要通过上述柔性膜材200表面磁性金属颗粒的收集方法将柔性膜材200表面的颗粒收集至磁性件104的表面，再将磁性件104表面的磁性金属颗粒转移到胶带上，然后对所述胶带上的磁性金属颗粒进行检测。在上述柔性膜材200表面磁性金属颗粒的检测方法中，转移到胶带上的磁性金属颗粒作为整个柔性膜材200表面的磁性金属颗粒，可以代表整个柔性膜材200的表面状态，进而可以提高检测的真实性和可靠性。同时，上述柔性膜材200表面磁性金属颗粒的检测方法适用范围广泛，对透明和不透明的柔性膜材200均能够获得较为准确的测试结果。
关于柔性膜材200表面磁性金属颗粒的检测方法，传统的方式主要采用扫描电镜法和CCD表面瑕疵检测法进行。具体为，扫描电镜法是将检测对象在卷料上裁剪下来，制成3mm×5mm大小的电镜样品，置于测试载样台，利用电镜聚焦的很窄的高能电子束来扫描样品，通过光束与物质间的相互作用，来激发各种物理信息，对这些信息收集、放大、再成像以达到对物质微观形貌表征，并且电镜系统配置EDS元素分析功能，通过分析微观表面物质的元素成分分析表面是否含有磁性金属颗粒。该扫描电镜法需要依赖昂贵的电镜设备，且取样面积较小，存在较大的偶然性，难以反应整个柔性膜材的真实表面状态。CCD表面瑕疵检测法针对透光率高的薄膜材料，系统采用透射的打光检测方式进行 检测，即光源在薄膜的下方，相机在薄膜的上方进行图像拍摄。产线运行时，系统通过编码器实时的采集产线运行状态信息并开始检测，系统将相机采集到的图像通过SIMV图像分析软件进行瑕疵处理，由于瑕疵与正常产品的图像在灰阶上存在明显差异，从而使得系统能够发现瑕疵，并通过进一步的计算、分析来确定瑕疵的大小、位置、类型等信息。该CCD表面瑕疵检测法使用范围较小，主要检查对象为透光材料，使用范围较窄。对于铜箔、铝箔等不透光材料无法使用。
在一个具体的示例中，通过偏振光对所述胶带上的磁性金属颗粒进行检测。在对柔性膜材200表面磁性金属颗粒进行检测时，通过偏振光对胶带上的颗粒进行检测，可以准确地判断磁性金属颗粒的大小和数量，更加真实地反映柔性膜材200的表面状态。具体地，金属表面的物理特性决定了光线不能进入金属物质，它会像镜子般把入射光反射出去。入射光在经由金属表面反射后，其反射光与入射光具有相同的振动方向；入射光在经过非金属物质后，其振动方向会发生改变(主要原因是光射入非金属物质内部)，经过非金属物质内部后再出来的反射光不再具有偏振性，其方向也会发生改变。利用这一原理偏振光可以穿过具有相同方向的偏振镜进入摄像机，当两个偏振镜处于十字交叉位置(其中一个转动90度)，偏振后的反射光不能穿过第二个偏振镜。磁性金属颗粒在十字交叉状态下是黑色，从而判断是否是磁性金属颗粒，以及其大小和数量，更加真实地反映柔性膜材200的表面状态。可选地，通过偏振光对胶带上的颗粒进行检测时，采用JOMES偏振光测试仪器对胶带上的颗粒进行检测。
可选地，作为胶带的选择示例，胶带包括麦拉胶带、透明胶带、双面胶或PP胶。在一个具体的示例中，胶带为麦拉胶带，在检测时，将麦拉胶带裁成长宽为5mm×5mm的方块，每次移动4cm进行颗粒转移，每个位置重复粘附3次。
在一个具体的示例中，将磁性件104吸附的颗粒转移到胶带上时，采用胶带将磁性件104吸附的磁性金属颗粒进行粘黏转移。其中，颗粒转移的要求满足以下两个要求：第二次粘取的数量是前两次总和的30％以下，以及最后一次粘取数量小于前面所有次总和的10％以下。以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准，说明书及附图可以用于解释权利要求的内容。

Claims (12)

  1. 一种柔性膜材表面磁性金属颗粒的收集设备，其特征在于，包括机架、放卷辊、传输装置、磁性件以及收卷辊；所述传输装置连接于所述机架，所述传输装置上设有传输通道，所述传输通道具有进料端和出料端；所述放卷辊和所述收卷辊分别连接于所述机架，且所述放卷辊位于所述传输通道的进料端以用于放卷柔性膜材，所述收卷辊位于所述传输通道的出料端以用于收卷柔性膜材；所述磁性件连接于所述机架，且所述磁性件位于所述传输通道的至少一侧以用于吸附柔性膜材表面的磁性金属颗粒。
  2. 根据权利要求1所述的柔性膜材表面磁性金属颗粒的收集设备，其特征在于，所述磁性件有多个，多个所述磁性件分别设于所述传输通道的两侧。
  3. 根据权利要求1或2所述的柔性膜材表面磁性金属颗粒的收集设备，其特征在于，所述磁性件由多个磁块依次拼接而成。
  4. 根据权利要求1～3中任一项所述的柔性膜材表面磁性金属颗粒的收集设备，其特征在于，所述磁性件可翻转地连接于所述机架上。
  5. 根据权利要求1～4中任一项所述的柔性膜材表面磁性金属颗粒的收集设备，其特征在于，所述机架上设有引导件，所述磁性件活动连接于所述引导件以用于调节所述磁性件与所述传输通道之间的距离，进而调节所述磁性件与柔性膜材的表面之间的距离。
  6. 根据权利要求1～5中任一项所述的柔性膜材表面磁性金属颗粒的收集设备，其特征在于，所述传输装置包括导料辊，所述导料辊连接于所述机架以用于引导柔性膜材穿过所述传输通道。
  7. 根据权利要求1～6中任一项所述的柔性膜材表面磁性金属颗粒的收集设备，其特征在于，还包括压力辊，所述压力辊活动连接于所述机架，所述压力辊与所述收卷辊之间的距离可调，且所述压力辊能够运动至抵接于所述收卷辊 上的柔性膜材；和/或，
    还包括张力辊，所述张力辊连接于所述机架以用于调节柔性膜材的张力。
  8. 一种柔性膜材表面磁性金属颗粒的收集与检测系统，其特征在于，包括：
    权利要求1～7中任一项所述的柔性膜材表面磁性金属颗粒的收集设备；
    金属颗粒转移模块，包括用于粘贴磁性件上的磁性金属颗粒的胶带、驱动胶带贴靠及远离磁性件移动的驱动单元；和
    偏振光检测模块，用于检测所述胶带上的磁性金属颗粒。
  9. 一种柔性膜材表面磁性金属颗粒的收集方法，其特征在于，采用权利要求1～7中任一项所述的柔性膜材表面磁性金属颗粒的收集设备，所述收集方法包括如下步骤：
    将卷状柔性膜材安装到放卷辊上放卷，并将柔性膜材通过所述传输装置传输至所述收卷辊收卷；
    通过所述磁性件吸附柔性膜材表面的磁性金属颗粒。
  10. 根据权利要求9所述的柔性膜材表面磁性金属颗粒的收集方法，其特征在于，控制柔性膜材的传输速度大于等于10m/min且小于等于100m/min；和/或，
    控制所述磁性件与所述柔性膜材的表面之间的距离大于0mm且小于等于20mm；和/或，
    控制柔性膜材的张力大于等于3N且小于等于100N。
  11. 一种柔性膜材表面磁性金属颗粒的检测方法，其特征在于，包括如下步骤：
    采用权利要求10所述的收集方法收集柔性膜材表面的磁性金属颗粒；
    将所述磁性件吸附的磁性金属颗粒转移到胶带上；
    对所述胶带上的磁性金属颗粒进行检测。
  12. 根据权利要求11所述的柔性膜材表面磁性金属颗粒的检测方法，其特征在于，通过偏振光对所述胶带上的磁性金属颗粒进行检测。
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