A flattening device
By using the electromagnet and magnetic clamping mechanism of the flattening device, the problem of deformation of lithium battery electrode sheets after baking was solved, achieving stable flattening of the material strip and improving product quality and pass rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-22
- Publication Date
- 2026-03-24
AI Technical Summary
After the lithium battery electrode sheets are baked, the strip is prone to inverted "U" or "M" shaped deformation, which can lead to problems such as strip breakage, foil wrinkling, and electrode tab folding in subsequent processes, affecting product quality and pass rate.
A flattening device is used, which uses electromagnets and magnetic components to clamp the strip. Through the cooperation of the moving frame and the motion frame, the strip is stretched and flattened along its width. The magnitude of the electromagnet current is adjusted to control the clamping force and avoid excessive stretching.
It effectively eliminates material strip wrinkles, improves product quality and pass rate, avoids material strip damage, and ensures stable flattening effect.
Smart Images
Figure CN116230848B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of battery manufacturing equipment technology, and in particular to a flattening device. Background Technology
[0002] As a new generation of rechargeable power source, lithium batteries have advantages such as high energy density, high operating voltage, wide operating temperature range, long cycle life, and high safety performance. They are the mainstream development direction of rechargeable batteries and have been widely used in various devices that use electricity as a power source, such as mobile phones, computers, and electric vehicles.
[0003] Lithium battery cells are generally produced by winding or stacking electrode sheets. In the process of preparing the electrode sheets, a coating process is required to apply the slurry to the foil. The main process flow of the coating process is: unwinding → coating → baking → rewinding. Figure 1 This is a schematic diagram of the cross-sectional structure of a normal electrode sheet formed after the coating process. The baking temperature is generally 70-140°C. During the baking process, the following... Figure 2 and Figure 3 As shown, both the wet slurry and the foil shrink during baking. However, due to the different shrinkage characteristics of the two materials, the blank area in the middle is prone to deformation (inverted "U" or "M" shape). Electrodes with inverted "U" or "M" shaped deformation will wrinkle when passing through the roller, which can lead to problems such as strip breakage, foil wrinkling, and electrode tab folding in subsequent processes, negatively impacting product quality and yield. Summary of the Invention
[0004] Based on this, it is necessary to provide a flattening device to address the problem that in the existing technology, the blank area of the electrode sheet after baking is prone to inverted "U" or "M" shaped deformation, and the electrode sheet will wrinkle when it passes through the roller. This can lead to problems such as strip breakage, foil wrinkling, and electrode tab folding in subsequent processes, which have an adverse effect on product quality and yield.
[0005] A flattening device is used to flatten a passing material strip. The flattening device includes a flattening unit, which includes a movable frame and two flattening mechanisms. Each flattening mechanism includes a movable frame and a first flattening block and a second flattening block, both of which are disposed on the movable frame. The movable frame is disposed on the movable frame, and a flattening channel is formed between the first flattening block and the second flattening block for the material strip to pass through.
[0006] Each of the flattening mechanisms further includes a first electromagnet and a first magnetic attractor, one of which is mounted on the first flattening block and the other is mounted on the second flattening block; the first electromagnet can drive the first flattening block and the second flattening block to clamp the material strip by applying a magnetic force to the first magnetic attractor;
[0007] The movable frame can be controlled to move along the conveying direction of the material belt, and the two movable frames can be controlled to move closer to or further away from each other relative to the movable frame along the width direction of the material belt.
[0008] In one embodiment, the flattening unit has a flattened state;
[0009] When the flattening unit is in the flattened state, the moving frame moves synchronously with the material belt along the conveying direction of the material belt, the first flattening block and the second flattening block clamp the material belt, and the two moving frames move away from each other relative to the moving frame along the width direction of the material belt.
[0010] In one embodiment, two flattening units are provided, which are arranged at intervals along the conveying direction of the material belt and alternately in the flattened state.
[0011] In one embodiment, each of the flattening mechanisms further includes a first drive member mounted on the motion frame, the first flattening block being connected to the drive end of the first drive member, the first drive member being used to drive the first flattening block to move closer to or away from the material strip.
[0012] In one embodiment, the first flattening block has a first iron core portion and a first coil wound around the outside of the first iron core portion, the first iron core portion and the first coil forming the first electromagnet; the first magnetic attractor is disposed on the second flattening block.
[0013] In one embodiment, each of the flattening mechanisms further includes an elastic element, the second flattening block being movably connected to the motion frame, and the two ends of the elastic element abutting against the motion frame and the second flattening block, respectively. The elastic element is used to provide a preload force that causes the second flattening block to have a tendency to move away from the first flattening block.
[0014] In one embodiment, each of the flattening mechanisms further includes a second electromagnet and a second magnetic attractor, one of which is mounted on the movable frame and the other is mounted on the moving frame;
[0015] The second electromagnet can drive the motion frame to move away from the motion frame of the other flattening mechanism along the width direction of the material strip by applying a magnetic force to the second magnetic attractor.
[0016] In one embodiment, the second electromagnet includes a second iron core connected to the moving frame and a second coil wound around the outside of the second iron core; the second magnetic attractor is disposed on the moving frame.
[0017] In one embodiment, each of the flattening mechanisms further includes a reset member connected to the movable frame and the motion frame, the reset member being used to drive the motion frame to move along the width direction of the strip toward the motion frame of another flattening mechanism.
[0018] In one embodiment, each of the flattening mechanisms further includes a first elastic pad and a second elastic pad, the first elastic pad being disposed on the side of the first flattening block facing the second flattening block, and the second elastic pad being disposed on the side of the second flattening block facing the first flattening block.
[0019] In actual use, when it is necessary to stretch and flatten the material strip, the above-mentioned flattening device first controls the moving frame to accelerate along the conveying direction of the material strip until the moving speed of the moving frame is equal to the conveying speed of the material strip. Then, the first electromagnets of the two flattening mechanisms are energized, so that each first electromagnet and its corresponding first magnetic suction component generate a magnetic attraction force, thereby driving the first flattening block and the second flattening block to move closer together until they clamp the material strip. At this time, the two clamping structures clamp the two sides of the material strip in the width direction. Then, the two moving frames are controlled to move away from each other relative to the moving frame in the width direction of the material strip, thereby driving the two clamping structures to move away from each other in the width direction of the material strip, and thus stretching and flattening the material strip in its width direction Y.
[0020] Thus, by using two clamping structures (each clamping structure including a pair of first flattening blocks and second flattening blocks) arranged along the width direction of the strip, the strip is clamped and driven to move away from each other along the width direction of the strip, thereby stretching and flattening the strip along the width direction. Since the clamping force of the first flattening block and the second flattening block on the strip is affected by the magnetic attraction between the first electromagnet and the first magnetic attractor, the current of the first electromagnet can be adjusted according to the wrinkles of the strip, thereby adjusting the clamping force of the first flattening block and the second flattening block on the strip (i.e., the greater the current of the first electromagnet, the greater the clamping force of the first flattening block and the second flattening block on the strip; the greater the current of the first electromagnet, the smaller the clamping force of the first flattening block and the second flattening block on the strip), the strip is prevented from being overstretched and damaged. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of a normal electrode.
[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the abnormal electrode ("M" shaped deformation);
[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the abnormal electrode (inverted "U" shaped deformation);
[0024] Figure 4 This is a schematic diagram of the flattening device in one embodiment of the present invention;
[0025] Figure 5 for Figure 4 Side view of the flattening device shown;
[0026] Figure 6 for Figure 4 A top view of the flattening device shown;
[0027] Figure 7 for Figure 5 A cross-sectional view of the flattening device shown along the EE direction;
[0028] Figure 8 for Figure 7 A magnified view of a portion at point G (clamping strip);
[0029] Figure 9 for Figure 7 The enlarged view of point G shown (with the material strip loosened). Detailed Implementation
[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0035] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0036] Please see Figures 4 to 7 As shown, one embodiment of the present invention provides a flattening device for flattening a passing material strip 100. It should be noted that the material strip 100 can be an electrode material strip after a coating process, or it can be other material strips 100 that need to be flattened, which is not limited here.
[0037] The flattening device includes a flattening unit 1, which includes a movable frame 10 and two flattening mechanisms 20. Each flattening mechanism 20 includes a movable frame 21 and a first flattening block 22 and a second flattening block 23, both mounted on the movable frame 21. The movable frame 21 is mounted on the movable frame 10 and moves with it. A flattening channel (not shown) is formed between the first flattening block 22 and the second flattening block 23 through which the feed strip 100 passes. Each flattening mechanism 20 also includes a first electromagnet 24 and a first magnetic attractor 25. One of the first electromagnet 24 and the first magnetic attractor 25 is mounted on the first flattening block 22, and the other is mounted on the second flattening block 23. The first electromagnet 24 can drive the first flattening block 22 and the second flattening block 23 to clamp the feed strip 100 passing through the flattening channel by applying a magnetic force to the first magnetic attractor 25. In other words, the first flattening block 22 and the second flattening block 23 of each flattening mechanism 20 form a clamping structure 22a for clamping the material belt 100. The moving frame 10 can be controlled to move along the conveying direction X of the material belt 100, thereby driving the two flattening mechanisms 20 to move along the conveying direction X of the material belt 100, that is, driving the two clamping structures 22a to move along the conveying direction X of the material belt 100. The two moving frames 21 can be controlled to move closer to or further away from each other relative to the moving frame 10 along the width direction Y of the material belt 100, thereby driving the two clamping structures 22a to move closer to or further away from each other.
[0038] In actual use, when the aforementioned flattening device needs to stretch the passing material belt 100, firstly, the moving frame 10 is accelerated along the conveying direction X of the material belt 100 until the moving speed of the moving frame 10 is equal to the conveying speed of the material belt 100. Then, the first electromagnets 24 of the two flattening mechanisms 20 are energized, so that each first electromagnet 24 and its corresponding first magnetic suction member 25 generate a magnetic attraction force and attract each other, thereby driving the first flattening block 22 and the second flattening block 23 to move closer to each other until they clamp the passing material belt 100 (see...). Figure 8 (As shown). At this time, the two clamping structures 22a clamp the two sides of the width direction Y of the strip 100 respectively. Then, the two moving frames 21 are controlled to move away from each other relative to the moving frame 10 along the width direction Y of the strip 100, thereby driving the two clamping structures 22a to move away from each other in the width direction Y of the strip 100, thereby stretching and flattening the strip 100 along its width direction Y.
[0039] Thus, the material strip 100 is clamped by two clamping structures 22a (each clamping structure 22a includes a pair of first flattening blocks 22 and second flattening blocks 23) arranged along the width direction Y of the material strip 100, and the two clamping structures 22a are driven to move away from each other along the width direction Y of the material strip 100, thereby stretching and flattening the material strip 100 along the width direction Y. Since the clamping force of the first flattening block 22 and the second flattening block 23 on the strip 100 is affected by the magnetic attraction between the first electromagnet 24 and the first magnetic attractor 25, the current of the first electromagnet 24 can be adjusted according to the wrinkles of the strip 100, thereby adjusting the clamping force of the first flattening block 22 and the second flattening block 23 on the strip 100 (i.e., the greater the current of the first electromagnet 24, the greater the clamping force of the first flattening block 22 and the second flattening block 23 on the strip 100; the greater the current of the first electromagnet 24, the smaller the clamping force of the first flattening block 22 and the second flattening block 23 on the strip 100), thus avoiding excessive stretching of the strip 100 and causing damage to the strip 100.
[0040] In the embodiments of this application, the flattening unit 1 has a flattened state and a non-flattened state. When the flattening unit 1 is in the flattened state: the moving frame 10 moves synchronously with the conveying direction X of the conveyor belt 100; the first flattening block 22 and the second flattening block 23 of the two flattening mechanisms 20 clamp the conveyor belt 100; the two moving frames 21 move away from each other relative to the moving frame 10 along the width direction Y of the conveyor belt 100, thereby driving the two clamping structures 22a to stretch and flatten the conveyor belt 100 along the width direction Y of the conveyor belt 100.
[0041] When the flattening unit 1 is in a non-flattened state: the first flattening block 22 and the second flattening block 23 of the two flattening mechanisms 20 both release the material belt 100, and the moving frame 10 returns to the initial position in the opposite direction to the conveying direction X of the material belt 100, in preparation for the next stretching and flattening action.
[0042] Furthermore, two flattening units 1 are configured, arranged at intervals along the conveying direction X of the conveyor belt 100, and alternately in the flattened state. Thus, when one flattening unit 1 is in the flattened state (i.e., when stretching the conveyor belt 100), the other flattening unit 1 is in the non-flattened state (i.e., when the moving frame 10 returns to the initial position). In other words, the two flattening units 1 alternately stretch and flatten the conveyor belt 100, ensuring that the conveyor belt 100 is always in a stretched state, thereby ensuring the flattening effect of the conveyor belt 100.
[0043] In embodiments of this application, each flattening mechanism 20 further includes a first driving member 26 mounted on a motion frame 21. A first flattening block 22 is connected to the driving end of the first driving member 26, enabling the first driving member 26 to drive the first flattening block 22 to move closer to or away from the passing material strip 100. Thus, when the material strip 100 needs to be stretched, firstly, the first driving member 26 drives the first flattening block 22 to move towards the passing material strip 100 (i.e., towards the second flattening block 23) until the first flattening block 22 contacts the material strip 100. Then, the first electromagnet 24 is energized, thereby attracting the first magnetic suction member 25 and driving the second flattening block 23 to move towards the first flattening block 22 until the first flattening block 22 and the second flattening block 23 together clamp the passing material strip 100. Optionally, the first driving member 26 can be a cylinder.
[0044] Please see Figure 7 As shown in the embodiment of this application, the first flattening block 22 has a first iron core portion 241 and a first coil 243 wound around the outside of the first iron core portion 241. The first iron core portion 241 and the first coil 243 form the aforementioned first electromagnet 24. A first magnetic suction member 25 is disposed on the second flattening block 23. Thus, when the first coil 243 is energized, the first electromagnet 24 generates a magnetic attraction force on the first magnetic suction member 25, thereby driving the second flattening block 23 to move closer to the first flattening block 22 under the action of the magnetic attraction force, until it clamps the strip 100 passing between the first flattening block 22 and the second flattening block 23. Furthermore, the clamping force of the first flattening block 22 and the second flattening block 23 on the strip 100 can be adjusted by adjusting the current of the first coil 243, thereby avoiding excessive stretching of the strip 100. Optionally, the first magnetic suction member 25 can be a magnet. Of course, in other embodiments, the first magnetic attractor 25 can also be an iron block or the like, as long as it can be attracted by the first electromagnet 24, and is not limited here.
[0045] Furthermore, each flattening mechanism 20 also includes an elastic element 27. The second flattening block 23 is movably connected to the motion frame 21, and both ends of the elastic element 27 abut against the motion frame 21 and the second flattening block 23, respectively. The elastic element 27 provides a preload force that causes the second flattening block 23 to tend to move away from the first flattening block 22. Thus, when it is necessary to clamp the strip 100, the first coil 243 is energized, thereby generating a magnetic attraction force on the first magnetic suction member 25. Under the action of this magnetic attraction force, the second flattening block 23 overcomes the preload force of the elastic element 27 and moves towards the first flattening block 22 until the second flattening block 23 and the first flattening block 22 clamp the strip 100 between them. When it is necessary to release the strip 100, the first coil 243 is de-energized, causing the magnetic attraction force on the first magnetic suction member 25 to disappear. At this time, the second flattening block 23 moves away from the first flattening block 22 under the action of the preload force provided by the elastic element 27, thereby releasing the strip 100. Alternatively, the elastic element 27 can be a spring.
[0046] In a specific embodiment, each flattening mechanism 20 further includes a first elastic pad 221 and a second elastic pad 231. The first elastic pad 221 is disposed on the side of the first flattening block 22 facing the second flattening block 23, and the second elastic pad 231 is disposed on the side of the second flattening block 23 facing the first flattening block 22. Thus, when the first flattening block 22 and the second flattening block 23 jointly clamp the material strip 100, the first flattening block 22 contacts one side of the material strip 100 through the first elastic pad 221, and the second flattening block 23 contacts the other side of the material strip 100 through the second elastic pad 231. This protects the material strip 100 from scratches or damage using the first elastic pad 221 and the second elastic pad 231.
[0047] In the embodiments of this application, each flattening mechanism 20 further includes a second electromagnet 28 and a second magnetic chuck 29. The second electromagnet 28 is mounted on the movable frame 10, and the second magnetic chuck 29 is mounted on the moving frame 21. The second electromagnet 28 can drive the moving frame 21 to move away from the moving frame 21 of the other flattening mechanism 20 along the width direction Y of the strip 100 by applying a magnetic force to the second magnetic chuck 29. Thus, when the strip 100 needs to be stretched and flattened, the first flattening block 22 and the second flattening block 23 of the two flattening mechanisms 20 clamp the strip 100, and the second electromagnets 28 of the two flattening mechanisms 20 are energized, so that the two second electromagnets 28 respectively generate a magnetic force on the corresponding second magnetic chuck 29, thereby driving the two moving frames 21 to move away from each other along the width direction Y of the strip 100, that is, driving the two clamping structures 22a to move away from each other along the width direction Y of the strip 100, so as to realize the stretching and flattening of the strip 100 along the width direction Y.
[0048] It should be noted that the speed at which the two moving frames 21 move away from each other is affected by the magnitude of the magnetic force between the second electromagnet 28 and the second magnetic chuck 29, and this magnetic force is in turn affected by the magnitude of the current in the second electromagnet 28. That is, the greater the current in the second electromagnet 28, the greater the magnetic force on the second magnetic chuck 29, the faster the two moving frames 21 move away from each other, and consequently the faster the stretching and flattening speed of the material strip 100. Conversely, the smaller the current in the second electromagnet 28, the smaller the magnetic force on the second magnetic chuck 29, the slower the two moving frames 21 move away from each other, and consequently the slower the stretching and flattening speed of the material strip 100. Therefore, the stretching and flattening speed of the material strip 100 can be adjusted by regulating the current in the second electromagnet 28 according to the degree of wrinkling in the material strip, to ensure the desired stretching and flattening effect.
[0049] Furthermore, the second electromagnet 28 includes a second iron core portion 281 connected to the movable frame 10 and a second coil 283 wound around the outside of the second iron core portion 281, and a second magnetic attractor 29 is disposed on the moving frame 21. Thus, when the second coils 283 of the two second electromagnets 28 are energized, the two second electromagnets 28 respectively generate a magnetic attraction force on their corresponding second magnetic attractors 29, thereby causing the two moving frames 21 to move away from each other relative to the movable frame 10 under the action of this magnetic attraction force. Optionally, the second magnetic attractor 29 can be a magnet. Of course, in other embodiments, the second magnetic attractor 29 can also be an iron block or the like, as long as it can be attracted by the electromagnet, and is not limited here.
[0050] Furthermore, each flattening mechanism 20 also includes a reset member 291 connected to the moving frame 10 and the moving frame 21. This reset member 291 drives the moving frame 21 to move closer to the moving frame 21 of the other flattening mechanism 20 along the width direction Y of the material strip 100, thereby causing the two moving frames 21 to move closer to each other and reset, so as to facilitate the stretching and flattening of the material strip 100 again. It should be noted that the reset member 291 can be a spring reset rod or an electric reset rod, etc., as long as it can drive the moving frame 21 to reset; no limitation is made here.
[0051] Furthermore, each flattening mechanism 20 also includes a slide rail 11 and a slider 210. The slide rail 11 is fixedly connected to the movable frame 10, and the slider 210 is fixedly connected to the moving frame 21. The slider 210 slides in conjunction with the slide rail 11, thereby guiding the movement of the moving frame 21 relative to the movable frame 10 by the movement of the slider 210 along the slide rail 11, making the movement of the two moving frames 21 closer to or further away from each other more stable and reliable. It should be noted that, in one embodiment, the slide rail 11 of the two flattening mechanisms 20 can be shared, that is, the sliders 210 of the two flattening mechanisms 20 are arranged on the same slide rail 11. Of course, in other embodiments, each of the two flattening mechanisms 20 is provided with a slide rail 11, as long as it can guide the movement of the two moving frames 21 closer to or further away from each other, and there is no limitation here.
[0052] The operation process of the flattening device is explained below with reference to the accompanying drawings (in which...). Figure 6 (Taking the flattened unit 1 on the left as an example for explanation):
[0053] For ease of description, Figure 6 The two flattening mechanisms 20 of the flattening unit 1 on the left are named the first flattening mechanism 20a and the second flattening mechanism 20b, respectively.
[0054] Initially, the material belt 100 is conveyed to the left, the clamping structure 22a of the first flattening mechanism 20a is located at point A, and the clamping structure 22a of the second flattening mechanism 20b is located at point A'.
[0055] First, the moving frame 10 accelerates along the same direction as the conveying direction X of the material belt 100 until the clamping structure 22a of the first flattening mechanism 20a reaches point B, and simultaneously the clamping structure 22a of the second flattening mechanism 20b reaches point B'. At this time, the moving speed of the moving frame 10 is equal to the conveying speed of the material belt 100. Then, the first driving members 26 of the two flattening mechanisms 20 drive the first flattening block 22 to move toward the material belt 100 until the first flattening block 22 contacts the material belt 100. Furthermore, the first coils 243 of both flattening mechanisms 20 are energized, causing the second flattening block 23 to move toward the first flattening block 22 until the first flattening block 22 and the second flattening block 23 clamp the material belt 100 (i.e., the two clamping structures 22a clamp the material belt 100 from both sides in the width direction Y of the material belt 100), see... Figure 8As shown. Then, the moving frame 10 continues to move at the same speed as the conveyor belt 100, and the second coils 283 of both flattening mechanisms 20 are energized, thereby driving the two moving frames 21 to move relative to the moving frame 10 along the width direction Y of the conveyor belt 100 until the clamping structure 22a of the first flattening mechanism 20a reaches point C, and simultaneously the clamping structure 22a of the second flattening mechanism 20b reaches point C'. At this point, one stretching and flattening of the conveyor belt 100 is completed. Then, the moving frame 10 decelerates and moves along the conveying direction X of the conveyor belt 100 until the clamping structures 22a of the first flattening mechanism 20a and the clamping structures 22a of the second flattening mechanism 20b reach points D and D', respectively. During this process, the first coils 243 of both flattening mechanisms 20 are de-energized, the first driving member 26 drives the first flattening block 22 to move away from the second flattening block 23, and the second flattening block 23 moves away from the first flattening block 22 under the action of the elastic member 27, thereby releasing the material strip 100 (see...). Figure 9 (As shown); the second coils 283 of the two flattening mechanisms 20 are de-energized, and the two moving frames 21 move closer to each other and reset under the action of their respective reset members 291; and when the clamping structure 22a of the first flattening mechanism 20a and the clamping structure 22a of the second flattening mechanism 20b reach points D and D' respectively, the moving speed of the moving frame 10 is 0.
[0056] Then, the moving frame 10 moves in the opposite direction to the conveying direction X of the material belt 100 until it drives the clamping structure 22a of the first flattening mechanism 20a back to point A, and at the same time drives the clamping structure 22a of the second flattening mechanism 20b back to point A'.
[0057] It should be noted that the two flattening units 1 alternately stretch and flatten the strip 100 according to the above steps to ensure that the strip 100 is always in a stretched state, so as to ensure the flattening effect of the strip 100.
[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0059] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.
Claims
1. A flattening device for flattening a passing material strip (100), characterized in that, The flattening device includes a flattening unit (1), which includes a movable frame (10) and two flattening mechanisms (20); each flattening mechanism (20) includes a movable frame (21) disposed on the movable frame (10) and a first flattening block (22) and a second flattening block (23) disposed on the movable frame (21), and a flattening channel for the material strip (100) to pass through is formed between the first flattening block (22) and the second flattening block (23); Each of the flattening mechanisms (20) further includes a first electromagnet (24) and a first magnetic attractor (25), one of which is mounted on the first flattening block (22) and the other is mounted on the second flattening block (23); the first electromagnet (24) can drive the first flattening block (22) and the second flattening block (23) to clamp the strip (100) by applying a magnetic force to the first magnetic attractor (25). The movable frame (10) can be controlled to move along the conveying direction X of the material belt (100), and the two moving frames (21) can be controlled to move closer to or further away from each other relative to the movable frame (10) along the width direction Y of the material belt (100). Each of the flattening mechanisms (20) further includes a second electromagnet (28) and a second magnetic attractor (29), one of which is mounted on the movable frame (10) and the other is mounted on the moving frame (21); the second electromagnet (28) is capable of moving the moving frame (21) away from the moving frame (21) of the other flattening mechanism (20) by applying a magnetic force to the second magnetic attractor (29).
2. The flattening device according to claim 1, characterized in that, The flattening unit (1) has a flattened state; When the flattening unit (1) is in the flattened state, the moving frame (10) moves synchronously with the material belt (100) along the conveying direction X of the material belt (100), the first flattening block (22) and the second flattening block (23) clamp the material belt (100), and the two moving frames (21) move away from each other relative to the moving frame (10) along the width direction Y of the material belt (100).
3. The flattening device according to claim 2, characterized in that, The flattening unit (1) is configured as two units, which are arranged at intervals along the conveying direction X of the material belt (100) and alternately in the flattened state.
4. The flattening device according to claim 1, characterized in that, Each of the flattening mechanisms (20) further includes a first drive member (26) mounted on the motion frame (21), the first flattening block (22) being connected to the drive end of the first drive member (26), and the first drive member (26) being used to drive the first flattening block (22) to move closer to or away from the material strip (100).
5. The flattening device according to claim 1, characterized in that, The first flattening block (22) has a first iron core (241) and a first coil (243) wound around the outside of the first iron core (241), the first iron core (241) and the first coil (243) forming the first electromagnet (24); the first magnetic attractor (25) is disposed on the second flattening block (23).
6. The flattening device according to claim 5, characterized in that, Each of the flattening mechanisms (20) further includes an elastic element (27), the second flattening block (23) is movably connected to the motion frame (21), and the two ends of the elastic element (27) abut against the motion frame (21) and the second flattening block (23) respectively. The elastic element (27) is used to provide a preload force that causes the second flattening block (23) to have a tendency to move away from the first flattening block (22).
7. The flattening device according to claim 1, characterized in that, The second electromagnet (28) includes a second iron core (281) connected to the moving frame (10) and a second coil (283) wound around the outside of the second iron core (281); the second magnetic attractor (29) is disposed on the moving frame (21).
8. The flattening device according to claim 1, characterized in that, Each of the flattening mechanisms (20) further includes a reset member (291) connected to the moving frame (10) and the moving frame (21), the reset member (291) being used to drive the moving frame (21) to move along the width direction Y of the strip (100) toward the moving frame (21) of the other flattening mechanism (20).
9. The flattening device according to claim 1, characterized in that, Each of the flattening mechanisms (20) further includes a first elastic pad (221) and a second elastic pad (231), the first elastic pad (221) being disposed on the side of the first flattening block (22) facing the second flattening block (23), and the second elastic pad (231) being disposed on the side of the second flattening block (23) facing the first flattening block (22).
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